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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 

Pull s390 updates from Heiko Carstens:
 "Since Martin is on vacation you get the s390 pull request from me:

   - Host large page support for KVM guests. As the patches have large
     impact on arch/s390/mm/ this series goes out via both the KVM and
     the s390 tree.

   - Add an option for no compression to the "Kernel compression mode"
     menu, this will come in handy with the rework of the early boot
     code.

   - A large rework of the early boot code that will make life easier
     for KASAN and KASLR. With the rework the bootable uncompressed
     image is not generated anymore, only the bzImage is available. For
     debuggung purposes the new "no compression" option is used.

   - Re-enable the gcc plugins as the issue with the latent entropy
     plugin is solved with the early boot code rework.

   - More spectre relates changes:
      + Detect the etoken facility and remove expolines automatically.
      + Add expolines to a few more indirect branches.

   - A rewrite of the common I/O layer trace points to make them
     consumable by 'perf stat'.

   - Add support for format-3 PCI function measurement blocks.

   - Changes for the zcrypt driver:
      + Add attributes to indicate the load of cards and queues.
      + Restructure some code for the upcoming AP device support in KVM.

   - Build flags improvements in various Makefiles.

   - A few fixes for the kdump support.

   - A couple of patches for gcc 8 compile warning cleanup.

   - Cleanup s390 specific proc handlers.

   - Add s390 support to the restartable sequence self tests.

   - Some PTR_RET vs PTR_ERR_OR_ZERO cleanup.

   - Lots of bug fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (107 commits)
  s390/dasd: fix hanging offline processing due to canceled worker
  s390/dasd: fix panic for failed online processing
  s390/mm: fix addressing exception after suspend/resume
  rseq/selftests: add s390 support
  s390: fix br_r1_trampoline for machines without exrl
  s390/lib: use expoline for all bcr instructions
  s390/numa: move initial setup of node_to_cpumask_map
  s390/kdump: Fix elfcorehdr size calculation
  s390/cpum_sf: save TOD clock base in SDBs for time conversion
  KVM: s390: Add huge page enablement control
  s390/mm: Add huge page gmap linking support
  s390/mm: hugetlb pages within a gmap can not be freed
  KVM: s390: Add skey emulation fault handling
  s390/mm: Add huge pmd storage key handling
  s390/mm: Clear skeys for newly mapped huge guest pmds
  s390/mm: Clear huge page storage keys on enable_skey
  s390/mm: Add huge page dirty sync support
  s390/mm: Add gmap pmd invalidation and clearing
  s390/mm: Add gmap pmd notification bit setting
  s390/mm: Add gmap pmd linking
  ...
This commit is contained in:
Linus Torvalds 2018-08-13 19:07:17 -07:00
parent 13e091b6dd 669f3765b7
commit 85a0b791bc
107 changed files with 2375 additions and 1097 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
Documentation/virtual/kvm/api.txt
View File

@ -4391,6 +4391,22 @@ all such vmexits.
Do not enable KVM_FEATURE_PV_UNHALT if you disable HLT exits.
7.14 KVM_CAP_S390_HPAGE_1M
Architectures: s390
Parameters: none
Returns: 0 on success, -EINVAL if hpage module parameter was not set
or cmma is enabled
With this capability the KVM support for memory backing with 1m pages
through hugetlbfs can be enabled for a VM. After the capability is
enabled, cmma can't be enabled anymore and pfmfi and the storage key
interpretation are disabled. If cmma has already been enabled or the
hpage module parameter is not set to 1, -EINVAL is returned.
While it is generally possible to create a huge page backed VM without
this capability, the VM will not be able to run.
8. Other capabilities.
----------------------

1
MAINTAINERS
View File

@ -12408,7 +12408,6 @@ F: drivers/pci/hotplug/s390_pci_hpc.c
S390 VFIO-CCW DRIVER
M: Cornelia Huck <cohuck@redhat.com>
M: Dong Jia Shi <bjsdjshi@linux.ibm.com>
M: Halil Pasic <pasic@linux.ibm.com>
L: linux-s390@vger.kernel.org
L: kvm@vger.kernel.org

1
arch/s390/Kconfig
View File

@ -145,6 +145,7 @@ config S390
select HAVE_KERNEL_LZ4
select HAVE_KERNEL_LZMA
select HAVE_KERNEL_LZO
select HAVE_KERNEL_UNCOMPRESSED
select HAVE_KERNEL_XZ
select HAVE_KPROBES
select HAVE_KRETPROBES

42
arch/s390/Makefile
View File

@ -14,8 +14,18 @@ LD_BFD := elf64-s390
LDFLAGS := -m elf64_s390
KBUILD_AFLAGS_MODULE += -fPIC
KBUILD_CFLAGS_MODULE += -fPIC
KBUILD_CFLAGS += -m64
KBUILD_AFLAGS += -m64
KBUILD_CFLAGS += -m64
aflags_dwarf := -Wa,-gdwarf-2
KBUILD_AFLAGS_DECOMPRESSOR := -m64 -D__ASSEMBLY__
KBUILD_AFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),$(aflags_dwarf))
KBUILD_CFLAGS_DECOMPRESSOR := -m64 -O2
KBUILD_CFLAGS_DECOMPRESSOR += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
KBUILD_CFLAGS_DECOMPRESSOR += -fno-delete-null-pointer-checks -msoft-float
KBUILD_CFLAGS_DECOMPRESSOR += -fno-asynchronous-unwind-tables
KBUILD_CFLAGS_DECOMPRESSOR += $(call cc-option,-ffreestanding)
KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO),-g)
KBUILD_CFLAGS_DECOMPRESSOR += $(if $(CONFIG_DEBUG_INFO_DWARF4), $(call cc-option, -gdwarf-4,))
UTS_MACHINE := s390x
STACK_SIZE := 16384
CHECKFLAGS += -D__s390__ -D__s390x__
@ -52,18 +62,14 @@ cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include
#
cflags-$(CONFIG_FRAME_POINTER) += -fno-optimize-sibling-calls
# old style option for packed stacks
ifeq ($(call cc-option-yn,-mkernel-backchain),y)
cflags-$(CONFIG_PACK_STACK) += -mkernel-backchain -D__PACK_STACK
aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
endif
# new style option for packed stacks
ifeq ($(call cc-option-yn,-mpacked-stack),y)
cflags-$(CONFIG_PACK_STACK) += -mpacked-stack -D__PACK_STACK
aflags-$(CONFIG_PACK_STACK) += -D__PACK_STACK
endif
KBUILD_AFLAGS_DECOMPRESSOR += $(aflags-y)
KBUILD_CFLAGS_DECOMPRESSOR += $(cflags-y)
ifeq ($(call cc-option-yn,-mstack-size=8192 -mstack-guard=128),y)
cflags-$(CONFIG_CHECK_STACK) += -mstack-size=$(STACK_SIZE)
ifneq ($(call cc-option-yn,-mstack-size=8192),y)
@ -71,8 +77,11 @@ cflags-$(CONFIG_CHECK_STACK) += -mstack-guard=$(CONFIG_STACK_GUARD)
endif
endif
ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
cflags-$(CONFIG_WARN_DYNAMIC_STACK) += -mwarn-dynamicstack
ifdef CONFIG_WARN_DYNAMIC_STACK
ifeq ($(call cc-option-yn,-mwarn-dynamicstack),y)
KBUILD_CFLAGS += -mwarn-dynamicstack
KBUILD_CFLAGS_DECOMPRESSOR += -mwarn-dynamicstack
endif
endif
ifdef CONFIG_EXPOLINE
@ -82,6 +91,7 @@ ifdef CONFIG_EXPOLINE
CC_FLAGS_EXPOLINE += -mindirect-branch-table
export CC_FLAGS_EXPOLINE
cflags-y += $(CC_FLAGS_EXPOLINE) -DCC_USING_EXPOLINE
aflags-y += -DCC_USING_EXPOLINE
endif
endif
@ -102,11 +112,12 @@ KBUILD_CFLAGS += -mbackchain -msoft-float $(cflags-y)
KBUILD_CFLAGS += -pipe -fno-strength-reduce -Wno-sign-compare
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables $(cfi)
KBUILD_AFLAGS += $(aflags-y) $(cfi)
export KBUILD_AFLAGS_DECOMPRESSOR
export KBUILD_CFLAGS_DECOMPRESSOR
OBJCOPYFLAGS := -O binary
head-y := arch/s390/kernel/head.o
head-y += arch/s390/kernel/head64.o
head-y := arch/s390/kernel/head64.o
# See arch/s390/Kbuild for content of core part of the kernel
core-y += arch/s390/
@ -121,7 +132,7 @@ boot := arch/s390/boot
syscalls := arch/s390/kernel/syscalls
tools := arch/s390/tools
all: image bzImage
all: bzImage
#KBUILD_IMAGE is necessary for packaging targets like rpm-pkg, deb-pkg...
KBUILD_IMAGE := $(boot)/bzImage
@ -129,7 +140,7 @@ KBUILD_IMAGE := $(boot)/bzImage
install: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $@
image bzImage: vmlinux
bzImage: vmlinux
$(Q)$(MAKE) $(build)=$(boot) $(boot)/$@
zfcpdump:
@ -152,8 +163,7 @@ archprepare:
# Don't use tabs in echo arguments
define archhelp
echo '* image - Kernel image for IPL ($(boot)/image)'
echo '* bzImage - Compressed kernel image for IPL ($(boot)/bzImage)'
echo '* bzImage - Kernel image for IPL ($(boot)/bzImage)'
echo ' install - Install kernel using'
echo ' (your) ~/bin/$(INSTALLKERNEL) or'
echo ' (distribution) /sbin/$(INSTALLKERNEL) or'

122
arch/s390/appldata/appldata_base.c
View File

@ -206,35 +206,28 @@ static int
appldata_timer_handler(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
unsigned int len;
char buf[2];
int timer_active = appldata_timer_active;
int zero = 0;
int one = 1;
int rc;
struct ctl_table ctl_entry = {
.procname = ctl->procname,
.data = &timer_active,
.maxlen = sizeof(int),
.extra1 = &zero,
.extra2 = &one,
};
rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
if (rc < 0 || !write)
return rc;
if (!*lenp || *ppos) {
*lenp = 0;
return 0;
}
if (!write) {
strncpy(buf, appldata_timer_active ? "1\n" : "0\n",
ARRAY_SIZE(buf));
len = strnlen(buf, ARRAY_SIZE(buf));
if (len > *lenp)
len = *lenp;
if (copy_to_user(buffer, buf, len))
return -EFAULT;
goto out;
}
len = *lenp;
if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
return -EFAULT;
spin_lock(&appldata_timer_lock);
if (buf[0] == '1')
if (timer_active)
__appldata_vtimer_setup(APPLDATA_ADD_TIMER);
else if (buf[0] == '0')
else
__appldata_vtimer_setup(APPLDATA_DEL_TIMER);
spin_unlock(&appldata_timer_lock);
out:
*lenp = len;
*ppos += len;
return 0;
}
@ -248,37 +241,24 @@ static int
appldata_interval_handler(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
unsigned int len;
int interval;
char buf[16];
int interval = appldata_interval;
int one = 1;
int rc;
struct ctl_table ctl_entry = {
.procname = ctl->procname,
.data = &interval,
.maxlen = sizeof(int),
.extra1 = &one,
};
if (!*lenp || *ppos) {
*lenp = 0;
return 0;
}
if (!write) {
len = sprintf(buf, "%i\n", appldata_interval);
if (len > *lenp)
len = *lenp;
if (copy_to_user(buffer, buf, len))
return -EFAULT;
goto out;
}
len = *lenp;
if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
return -EFAULT;
interval = 0;
sscanf(buf, "%i", &interval);
if (interval <= 0)
return -EINVAL;
rc = proc_dointvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
if (rc < 0 || !write)
return rc;
spin_lock(&appldata_timer_lock);
appldata_interval = interval;
__appldata_vtimer_setup(APPLDATA_MOD_TIMER);
spin_unlock(&appldata_timer_lock);
out:
*lenp = len;
*ppos += len;
return 0;
}
@ -293,10 +273,17 @@ appldata_generic_handler(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
struct appldata_ops *ops = NULL, *tmp_ops;
unsigned int len;
int rc, found;
char buf[2];
struct list_head *lh;
int rc, found;
int active;
int zero = 0;
int one = 1;
struct ctl_table ctl_entry = {
.data = &active,
.maxlen = sizeof(int),
.extra1 = &zero,
.extra2 = &one,
};
found = 0;
mutex_lock(&appldata_ops_mutex);
@ -317,31 +304,15 @@ appldata_generic_handler(struct ctl_table *ctl, int write,
}
mutex_unlock(&appldata_ops_mutex);
if (!*lenp || *ppos) {
*lenp = 0;
active = ops->active;
rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
if (rc < 0 || !write) {
module_put(ops->owner);
return 0;
}
if (!write) {
strncpy(buf, ops->active ? "1\n" : "0\n", ARRAY_SIZE(buf));
len = strnlen(buf, ARRAY_SIZE(buf));
if (len > *lenp)
len = *lenp;
if (copy_to_user(buffer, buf, len)) {
module_put(ops->owner);
return -EFAULT;
}
goto out;
}
len = *lenp;
if (copy_from_user(buf, buffer,
len > sizeof(buf) ? sizeof(buf) : len)) {
module_put(ops->owner);
return -EFAULT;
return rc;
}
mutex_lock(&appldata_ops_mutex);
if ((buf[0] == '1') && (ops->active == 0)) {
if (active && (ops->active == 0)) {
// protect work queue callback
if (!try_module_get(ops->owner)) {
mutex_unlock(&appldata_ops_mutex);
@ -359,7 +330,7 @@ appldata_generic_handler(struct ctl_table *ctl, int write,
module_put(ops->owner);
} else
ops->active = 1;
} else if ((buf[0] == '0') && (ops->active == 1)) {
} else if (!active && (ops->active == 1)) {
ops->active = 0;
rc = appldata_diag(ops->record_nr, APPLDATA_STOP_REC,
(unsigned long) ops->data, ops->size,
@ -370,9 +341,6 @@ appldata_generic_handler(struct ctl_table *ctl, int write,
module_put(ops->owner);
}
mutex_unlock(&appldata_ops_mutex);
out:
*lenp = len;
*ppos += len;
module_put(ops->owner);
return 0;
}

45
arch/s390/boot/Makefile
View File

@ -3,19 +3,52 @@
# Makefile for the linux s390-specific parts of the memory manager.
#
targets := image
targets += bzImage
subdir- := compressed
KCOV_INSTRUMENT := n
GCOV_PROFILE := n
UBSAN_SANITIZE := n
$(obj)/image: vmlinux FORCE
$(call if_changed,objcopy)
KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
#
# Use -march=z900 for als.c to be able to print an error
# message if the kernel is started on a machine which is too old
#
ifneq ($(CC_FLAGS_MARCH),-march=z900)
AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH)
AFLAGS_head.o += -march=z900
AFLAGS_REMOVE_mem.o += $(CC_FLAGS_MARCH)
AFLAGS_mem.o += -march=z900
CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH)
CFLAGS_als.o += -march=z900
CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH)
CFLAGS_sclp_early_core.o += -march=z900
endif
CFLAGS_sclp_early_core.o += -I$(srctree)/drivers/s390/char
obj-y := head.o als.o ebcdic.o sclp_early_core.o mem.o
targets := bzImage startup.a $(obj-y)
subdir- := compressed
OBJECTS := $(addprefix $(obj)/,$(obj-y))
$(obj)/bzImage: $(obj)/compressed/vmlinux FORCE
$(call if_changed,objcopy)
$(obj)/compressed/vmlinux: FORCE
$(obj)/compressed/vmlinux: $(obj)/startup.a FORCE
$(Q)$(MAKE) $(build)=$(obj)/compressed $@
quiet_cmd_ar = AR $@
cmd_ar = rm -f $@; $(AR) rcsTP$(KBUILD_ARFLAGS) $@ $(filter $(OBJECTS), $^)
$(obj)/startup.a: $(OBJECTS) FORCE
$(call if_changed,ar)
install: $(CONFIGURE) $(obj)/bzImage
sh -x $(srctree)/$(obj)/install.sh $(KERNELRELEASE) $(obj)/bzImage \
System.map "$(INSTALL_PATH)"
chkbss := $(OBJECTS)
chkbss-target := $(obj)/startup.a
include $(srctree)/arch/s390/scripts/Makefile.chkbss

20
arch/s390/kernel/als.c → arch/s390/boot/als.c
View File

@ -3,12 +3,10 @@
* Copyright IBM Corp. 2016
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <asm/processor.h>
#include <asm/facility.h>
#include <asm/lowcore.h>
#include <asm/sclp.h>
#include "entry.h"
/*
* The code within this file will be called very early. It may _not_
@ -18,9 +16,9 @@
* For temporary objects the stack (16k) should be used.
*/
static unsigned long als[] __initdata = { FACILITIES_ALS };
static unsigned long als[] = { FACILITIES_ALS };
static void __init u16_to_hex(char *str, u16 val)
static void u16_to_hex(char *str, u16 val)
{
int i, num;
@ -33,9 +31,9 @@ static void __init u16_to_hex(char *str, u16 val)
*str = '\0';
}
static void __init print_machine_type(void)
static void print_machine_type(void)
{
static char mach_str[80] __initdata = "Detected machine-type number: ";
static char mach_str[80] = "Detected machine-type number: ";
char type_str[5];
struct cpuid id;
@ -46,7 +44,7 @@ static void __init print_machine_type(void)
sclp_early_printk(mach_str);
}
static void __init u16_to_decimal(char *str, u16 val)
static void u16_to_decimal(char *str, u16 val)
{
int div = 1;
@ -60,9 +58,9 @@ static void __init u16_to_decimal(char *str, u16 val)
*str = '\0';
}
static void __init print_missing_facilities(void)
static void print_missing_facilities(void)
{
static char als_str[80] __initdata = "Missing facilities: ";
static char als_str[80] = "Missing facilities: ";
unsigned long val;
char val_str[6];
int i, j, first;
@ -95,7 +93,7 @@ static void __init print_missing_facilities(void)
sclp_early_printk("See Principles of Operations for facility bits\n");
}
static void __init facility_mismatch(void)
static void facility_mismatch(void)
{
sclp_early_printk("The Linux kernel requires more recent processor hardware\n");
print_machine_type();
@ -103,7 +101,7 @@ static void __init facility_mismatch(void)
disabled_wait(0x8badcccc);
}
void __init verify_facilities(void)
void verify_facilities(void)
{
int i;

1
arch/s390/boot/compressed/.gitignore vendored
View File

@ -1,4 +1,5 @@
sizes.h
vmlinux
vmlinux.lds
vmlinux.scr.lds
vmlinux.bin.full

59
arch/s390/boot/compressed/Makefile
View File

@ -6,39 +6,29 @@
#
KCOV_INSTRUMENT := n
targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
targets += misc.o piggy.o sizes.h head.o
KBUILD_CFLAGS := -m64 -D__KERNEL__ -O2
KBUILD_CFLAGS += -DDISABLE_BRANCH_PROFILING -D__NO_FORTIFY
KBUILD_CFLAGS += $(cflags-y) -fno-delete-null-pointer-checks -msoft-float
KBUILD_CFLAGS += -fno-asynchronous-unwind-tables
KBUILD_CFLAGS += $(call cc-option,-mpacked-stack)
KBUILD_CFLAGS += $(call cc-option,-ffreestanding)
GCOV_PROFILE := n
UBSAN_SANITIZE := n
OBJECTS := $(addprefix $(objtree)/arch/s390/kernel/, head.o ebcdic.o als.o)
OBJECTS += $(objtree)/drivers/s390/char/sclp_early_core.o
OBJECTS += $(obj)/head.o $(obj)/misc.o $(obj)/piggy.o
obj-y := $(if $(CONFIG_KERNEL_UNCOMPRESSED),,head.o misc.o) piggy.o
targets := vmlinux.lds vmlinux vmlinux.bin vmlinux.bin.gz vmlinux.bin.bz2
targets += vmlinux.bin.xz vmlinux.bin.lzma vmlinux.bin.lzo vmlinux.bin.lz4
targets += vmlinux.scr.lds $(obj-y) $(if $(CONFIG_KERNEL_UNCOMPRESSED),,sizes.h)
KBUILD_AFLAGS := $(KBUILD_AFLAGS_DECOMPRESSOR)
KBUILD_CFLAGS := $(KBUILD_CFLAGS_DECOMPRESSOR)
OBJECTS := $(addprefix $(obj)/,$(obj-y))
LDFLAGS_vmlinux := --oformat $(LD_BFD) -e startup -T
$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS)
$(obj)/vmlinux: $(obj)/vmlinux.lds $(objtree)/arch/s390/boot/startup.a $(OBJECTS)
$(call if_changed,ld)
TRIM_HEAD_SIZE := 0x11000
sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - $(TRIM_HEAD_SIZE))/p'
# extract required uncompressed vmlinux symbols and adjust them to reflect offsets inside vmlinux.bin
sed-sizes := -e 's/^\([0-9a-fA-F]*\) . \(__bss_start\|_end\)$$/\#define SZ\2 (0x\1 - 0x100000)/p'
quiet_cmd_sizes = GEN $@
cmd_sizes = $(NM) $< | sed -n $(sed-sizes) > $@
quiet_cmd_trim_head = TRIM $@
cmd_trim_head = tail -c +$$(($(TRIM_HEAD_SIZE) + 1)) $< > $@
$(obj)/sizes.h: vmlinux
$(call if_changed,sizes)
@ -48,21 +38,18 @@ $(obj)/head.o: $(obj)/sizes.h
CFLAGS_misc.o += -I$(objtree)/$(obj)
$(obj)/misc.o: $(obj)/sizes.h
OBJCOPYFLAGS_vmlinux.bin.full := -R .comment -S
$(obj)/vmlinux.bin.full: vmlinux
OBJCOPYFLAGS_vmlinux.bin := -R .comment -S
$(obj)/vmlinux.bin: vmlinux
$(call if_changed,objcopy)
$(obj)/vmlinux.bin: $(obj)/vmlinux.bin.full
$(call if_changed,trim_head)
vmlinux.bin.all-y := $(obj)/vmlinux.bin
suffix-$(CONFIG_KERNEL_GZIP) := gz
suffix-$(CONFIG_KERNEL_BZIP2) := bz2
suffix-$(CONFIG_KERNEL_LZ4) := lz4
suffix-$(CONFIG_KERNEL_LZMA) := lzma
suffix-$(CONFIG_KERNEL_LZO) := lzo
suffix-$(CONFIG_KERNEL_XZ) := xz
suffix-$(CONFIG_KERNEL_GZIP) := .gz
suffix-$(CONFIG_KERNEL_BZIP2) := .bz2
suffix-$(CONFIG_KERNEL_LZ4) := .lz4
suffix-$(CONFIG_KERNEL_LZMA) := .lzma
suffix-$(CONFIG_KERNEL_LZO) := .lzo
suffix-$(CONFIG_KERNEL_XZ) := .xz
$(obj)/vmlinux.bin.gz: $(vmlinux.bin.all-y)
$(call if_changed,gzip)
@ -78,5 +65,9 @@ $(obj)/vmlinux.bin.xz: $(vmlinux.bin.all-y)
$(call if_changed,xzkern)
LDFLAGS_piggy.o := -r --format binary --oformat $(LD_BFD) -T
$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/vmlinux.bin.$(suffix-y)
$(obj)/piggy.o: $(obj)/vmlinux.scr.lds $(obj)/vmlinux.bin$(suffix-y)
$(call if_changed,ld)
chkbss := $(filter-out $(obj)/misc.o $(obj)/piggy.o,$(OBJECTS))
chkbss-target := $(obj)/vmlinux.bin
include $(srctree)/arch/s390/scripts/Makefile.chkbss

8
arch/s390/boot/compressed/head.S
View File

@ -15,7 +15,7 @@
#include "sizes.h"
__HEAD
ENTRY(startup_continue)
ENTRY(startup_decompressor)
basr %r13,0 # get base
.LPG1:
# setup stack
@ -23,7 +23,7 @@ ENTRY(startup_continue)
aghi %r15,-160
brasl %r14,decompress_kernel
# Set up registers for memory mover. We move the decompressed image to
# 0x11000, where startup_continue of the decompressed image is supposed
# 0x100000, where startup_continue of the decompressed image is supposed
# to be.
lgr %r4,%r2
lg %r2,.Loffset-.LPG1(%r13)
@ -33,7 +33,7 @@ ENTRY(startup_continue)
la %r1,0x200
mvc 0(mover_end-mover,%r1),mover-.LPG1(%r13)
# When the memory mover is done we pass control to
# arch/s390/kernel/head64.S:startup_continue which lives at 0x11000 in
# arch/s390/kernel/head64.S:startup_continue which lives at 0x100000 in
# the decompressed image.
lgr %r6,%r2
br %r1
@ -47,6 +47,6 @@ mover_end:
.Lstack:
.quad 0x8000 + (1<<(PAGE_SHIFT+THREAD_SIZE_ORDER))
.Loffset:
.quad 0x11000
.quad 0x100000
.Lmvsize:
.quad SZ__bss_start

37
arch/s390/boot/compressed/misc.c
View File

@ -71,43 +71,6 @@ static int puts(const char *s)
return 0;
}
void *memset(void *s, int c, size_t n)
{
char *xs;
xs = s;
while (n--)
*xs++ = c;
return s;
}
void *memcpy(void *dest, const void *src, size_t n)
{
const char *s = src;
char *d = dest;
while (n--)
*d++ = *s++;
return dest;
}
void *memmove(void *dest, const void *src, size_t n)
{
const char *s = src;
char *d = dest;
if (d <= s) {
while (n--)
*d++ = *s++;
} else {
d += n;
s += n;
while (n--)
*--d = *--s;
}
return dest;
}
static void error(char *x)
{
unsigned long long psw = 0x000a0000deadbeefULL;

15
arch/s390/boot/compressed/vmlinux.lds.S
View File

@ -23,13 +23,10 @@ SECTIONS
*(.text.*)
_etext = . ;
}
.rodata.compressed : {
*(.rodata.compressed)
}
.rodata : {
_rodata = . ;
*(.rodata) /* read-only data */
*(.rodata.*)
*(EXCLUDE_FILE (*piggy.o) .rodata.compressed)
_erodata = . ;
}
.data : {
@ -38,6 +35,15 @@ SECTIONS
*(.data.*)
_edata = . ;
}
startup_continue = 0x100000;
#ifdef CONFIG_KERNEL_UNCOMPRESSED
. = 0x100000;
#else
. = ALIGN(8);
#endif
.rodata.compressed : {
*(.rodata.compressed)
}
. = ALIGN(256);
.bss : {
_bss = . ;
@ -54,5 +60,6 @@ SECTIONS
*(.eh_frame)
*(__ex_table)
*(*__ksymtab*)
*(___kcrctab*)
}
}

4
arch/s390/boot/compressed/vmlinux.scr → arch/s390/boot/compressed/vmlinux.scr.lds.S
View File

@ -2,10 +2,14 @@
SECTIONS
{
.rodata.compressed : {
#ifndef CONFIG_KERNEL_UNCOMPRESSED
input_len = .;
LONG(input_data_end - input_data) input_data = .;
#endif
*(.data)
#ifndef CONFIG_KERNEL_UNCOMPRESSED
output_len = . - 4;
input_data_end = .;
#endif
}
}

2
arch/s390/boot/ebcdic.c Normal file
View File

@ -0,0 +1,2 @@
// SPDX-License-Identifier: GPL-2.0
#include "../kernel/ebcdic.c"

11
arch/s390/kernel/head.S → arch/s390/boot/head.S
View File

@ -272,14 +272,14 @@ iplstart:
.org 0x10000
ENTRY(startup)
j .Lep_startup_normal
.org 0x10008
.org EP_OFFSET
#
# This is a list of s390 kernel entry points. At address 0x1000f the number of
# valid entry points is stored.
#
# IMPORTANT: Do not change this table, it is s390 kernel ABI!
#
.ascii "S390EP"
.ascii EP_STRING
.byte 0x00,0x01
#
# kdump startup-code at 0x10010, running in 64 bit absolute addressing mode
@ -310,10 +310,11 @@ ENTRY(startup_kdump)
l %r15,.Lstack-.LPG0(%r13)
ahi %r15,-STACK_FRAME_OVERHEAD
brasl %r14,verify_facilities
# For uncompressed images, continue in
# arch/s390/kernel/head64.S. For compressed images, continue in
# arch/s390/boot/compressed/head.S.
#ifdef CONFIG_KERNEL_UNCOMPRESSED
jg startup_continue
#else
jg startup_decompressor
#endif
.Lstack:
.long 0x8000 + (1<<(PAGE_SHIFT+THREAD_SIZE_ORDER))

0
arch/s390/kernel/head_kdump.S → arch/s390/boot/head_kdump.S
View File

2
arch/s390/boot/mem.S Normal file
View File

@ -0,0 +1,2 @@
/* SPDX-License-Identifier: GPL-2.0 */
#include "../lib/mem.S"

2
arch/s390/boot/sclp_early_core.c Normal file
View File

@ -0,0 +1,2 @@
// SPDX-License-Identifier: GPL-2.0
#include "../../../drivers/s390/char/sclp_early_core.c"

4
arch/s390/hypfs/hypfs_diag.c
View File

@ -497,7 +497,7 @@ static int hypfs_create_cpu_files(struct dentry *cpus_dir, void *cpu_info)
}
diag224_idx2name(cpu_info__ctidx(diag204_info_type, cpu_info), buffer);
rc = hypfs_create_str(cpu_dir, "type", buffer);
return PTR_RET(rc);
return PTR_ERR_OR_ZERO(rc);
}
static void *hypfs_create_lpar_files(struct dentry *systems_dir, void *part_hdr)
@ -544,7 +544,7 @@ static int hypfs_create_phys_cpu_files(struct dentry *cpus_dir, void *cpu_info)
return PTR_ERR(rc);
diag224_idx2name(phys_cpu__ctidx(diag204_info_type, cpu_info), buffer);
rc = hypfs_create_str(cpu_dir, "type", buffer);
return PTR_RET(rc);
return PTR_ERR_OR_ZERO(rc);
}
static void *hypfs_create_phys_files(struct dentry *parent_dir, void *phys_hdr)

6
arch/s390/hypfs/inode.c
View File

@ -36,7 +36,7 @@ struct hypfs_sb_info {
kuid_t uid; /* uid used for files and dirs */
kgid_t gid; /* gid used for files and dirs */
struct dentry *update_file; /* file to trigger update */
time_t last_update; /* last update time in secs since 1970 */
time64_t last_update; /* last update, CLOCK_MONOTONIC time */
struct mutex lock; /* lock to protect update process */
};
@ -52,7 +52,7 @@ static void hypfs_update_update(struct super_block *sb)
struct hypfs_sb_info *sb_info = sb->s_fs_info;
struct inode *inode = d_inode(sb_info->update_file);
sb_info->last_update = get_seconds();
sb_info->last_update = ktime_get_seconds();
inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
}
@ -179,7 +179,7 @@ static ssize_t hypfs_write_iter(struct kiocb *iocb, struct iov_iter *from)
* to restart data collection in this case.
*/
mutex_lock(&fs_info->lock);
if (fs_info->last_update == get_seconds()) {
if (fs_info->last_update == ktime_get_seconds()) {
rc = -EBUSY;
goto out;
}

286
arch/s390/include/asm/ap.h
View File

@ -46,6 +46,50 @@ struct ap_queue_status {
unsigned int _pad2 : 16;
};
/**
* ap_intructions_available() - Test if AP instructions are available.
*
* Returns 0 if the AP instructions are installed.
*/
static inline int ap_instructions_available(void)
{
register unsigned long reg0 asm ("0") = AP_MKQID(0, 0);
register unsigned long reg1 asm ("1") = -ENODEV;
register unsigned long reg2 asm ("2");
asm volatile(
" .long 0xb2af0000\n" /* PQAP(TAPQ) */
"0: la %0,0\n"
"1:\n"
EX_TABLE(0b, 1b)
: "+d" (reg1), "=d" (reg2)
: "d" (reg0)
: "cc");
return reg1;
}
/**
* ap_tapq(): Test adjunct processor queue.
* @qid: The AP queue number
* @info: Pointer to queue descriptor
*
* Returns AP queue status structure.
*/
static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info)
{
register unsigned long reg0 asm ("0") = qid;
register struct ap_queue_status reg1 asm ("1");
register unsigned long reg2 asm ("2");
asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */
: "=d" (reg1), "=d" (reg2)
: "d" (reg0)
: "cc");
if (info)
*info = reg2;
return reg1;
}
/**
* ap_test_queue(): Test adjunct processor queue.
* @qid: The AP queue number
@ -54,10 +98,57 @@ struct ap_queue_status {
*
* Returns AP queue status structure.
*/
struct ap_queue_status ap_test_queue(ap_qid_t qid,
int tbit,
unsigned long *info);
static inline struct ap_queue_status ap_test_queue(ap_qid_t qid,
int tbit,
unsigned long *info)
{
if (tbit)
qid |= 1UL << 23; /* set T bit*/
return ap_tapq(qid, info);
}
/**
* ap_pqap_rapq(): Reset adjunct processor queue.
* @qid: The AP queue number
*
* Returns AP queue status structure.
*/
static inline struct ap_queue_status ap_rapq(ap_qid_t qid)
{
register unsigned long reg0 asm ("0") = qid | (1UL << 24);
register struct ap_queue_status reg1 asm ("1");
asm volatile(
".long 0xb2af0000" /* PQAP(RAPQ) */
: "=d" (reg1)
: "d" (reg0)
: "cc");
return reg1;
}
/**
* ap_pqap_zapq(): Reset and zeroize adjunct processor queue.
* @qid: The AP queue number
*
* Returns AP queue status structure.
*/
static inline struct ap_queue_status ap_zapq(ap_qid_t qid)
{
register unsigned long reg0 asm ("0") = qid | (2UL << 24);
register struct ap_queue_status reg1 asm ("1");
asm volatile(
".long 0xb2af0000" /* PQAP(ZAPQ) */
: "=d" (reg1)
: "d" (reg0)
: "cc");
return reg1;
}
/**
* struct ap_config_info - convenience struct for AP crypto
* config info as returned by the ap_qci() function.
*/
struct ap_config_info {
unsigned int apsc : 1; /* S bit */
unsigned int apxa : 1; /* N bit */
@ -74,50 +165,189 @@ struct ap_config_info {
unsigned char _reserved4[16];
} __aligned(8);
/*
* ap_query_configuration(): Fetch cryptographic config info
/**
* ap_qci(): Get AP configuration data
*
* Returns the ap configuration info fetched via PQAP(QCI).
* On success 0 is returned, on failure a negative errno
* is returned, e.g. if the PQAP(QCI) instruction is not
* available, the return value will be -EOPNOTSUPP.
* Returns 0 on success, or -EOPNOTSUPP.
*/
int ap_query_configuration(struct ap_config_info *info);
static inline int ap_qci(struct ap_config_info *config)
{
register unsigned long reg0 asm ("0") = 4UL << 24;
register unsigned long reg1 asm ("1") = -EOPNOTSUPP;
register struct ap_config_info *reg2 asm ("2") = config;
asm volatile(
".long 0xb2af0000\n" /* PQAP(QCI) */
"0: la %0,0\n"
"1:\n"
EX_TABLE(0b, 1b)
: "+d" (reg1)
: "d" (reg0), "d" (reg2)
: "cc", "memory");
return reg1;
}
/*
* struct ap_qirq_ctrl - convenient struct for easy invocation
* of the ap_queue_irq_ctrl() function. This struct is passed
* as GR1 parameter to the PQAP(AQIC) instruction. For details
* please see the AR documentation.
* of the ap_aqic() function. This struct is passed as GR1
* parameter to the PQAP(AQIC) instruction. For details please
* see the AR documentation.
*/
struct ap_qirq_ctrl {
unsigned int _res1 : 8;
unsigned int zone : 8; /* zone info */
unsigned int ir : 1; /* ir flag: enable (1) or disable (0) irq */
unsigned int zone : 8; /* zone info */
unsigned int ir : 1; /* ir flag: enable (1) or disable (0) irq */
unsigned int _res2 : 4;
unsigned int gisc : 3; /* guest isc field */
unsigned int gisc : 3; /* guest isc field */
unsigned int _res3 : 6;
unsigned int gf : 2; /* gisa format */
unsigned int gf : 2; /* gisa format */
unsigned int _res4 : 1;
unsigned int gisa : 27; /* gisa origin */
unsigned int gisa : 27; /* gisa origin */
unsigned int _res5 : 1;
unsigned int isc : 3; /* irq sub class */
unsigned int isc : 3; /* irq sub class */
};
/**
* ap_queue_irq_ctrl(): Control interruption on a AP queue.
* ap_aqic(): Control interruption for a specific AP.
* @qid: The AP queue number
* @qirqctrl: struct ap_qirq_ctrl, see above
* @qirqctrl: struct ap_qirq_ctrl (64 bit value)
* @ind: The notification indicator byte
*
* Returns AP queue status.
*
* Control interruption on the given AP queue.
* Just a simple wrapper function for the low level PQAP(AQIC)
* instruction available for other kernel modules.
*/
struct ap_queue_status ap_queue_irq_ctrl(ap_qid_t qid,
struct ap_qirq_ctrl qirqctrl,
void *ind);
static inline struct ap_queue_status ap_aqic(ap_qid_t qid,
struct ap_qirq_ctrl qirqctrl,
void *ind)
{
register unsigned long reg0 asm ("0") = qid | (3UL << 24);
register struct ap_qirq_ctrl reg1_in asm ("1") = qirqctrl;
register struct ap_queue_status reg1_out asm ("1");
register void *reg2 asm ("2") = ind;
asm volatile(
".long 0xb2af0000" /* PQAP(AQIC) */
: "=d" (reg1_out)
: "d" (reg0), "d" (reg1_in), "d" (reg2)
: "cc");
return reg1_out;
}
/*
* union ap_qact_ap_info - used together with the
* ap_aqic() function to provide a convenient way
* to handle the ap info needed by the qact function.
*/
union ap_qact_ap_info {
unsigned long val;
struct {
unsigned int : 3;
unsigned int mode : 3;
unsigned int : 26;
unsigned int cat : 8;
unsigned int : 8;
unsigned char ver[2];
};
};
/**
* ap_qact(): Query AP combatibility type.
* @qid: The AP queue number
* @apinfo: On input the info about the AP queue. On output the
* alternate AP queue info provided by the qact function
* in GR2 is stored in.
*
* Returns AP queue status. Check response_code field for failures.
*/
static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,
union ap_qact_ap_info *apinfo)
{
register unsigned long reg0 asm ("0") = qid | (5UL << 24)
| ((ifbit & 0x01) << 22);
register unsigned long reg1_in asm ("1") = apinfo->val;
register struct ap_queue_status reg1_out asm ("1");
register unsigned long reg2 asm ("2");
asm volatile(
".long 0xb2af0000" /* PQAP(QACT) */
: "+d" (reg1_in), "=d" (reg1_out), "=d" (reg2)
: "d" (reg0)
: "cc");
apinfo->val = reg2;
return reg1_out;
}
/**
* ap_nqap(): Send message to adjunct processor queue.
* @qid: The AP queue number
* @psmid: The program supplied message identifier
* @msg: The message text
* @length: The message length
*
* Returns AP queue status structure.
* Condition code 1 on NQAP can't happen because the L bit is 1.
* Condition code 2 on NQAP also means the send is incomplete,
* because a segment boundary was reached. The NQAP is repeated.
*/
static inline struct ap_queue_status ap_nqap(ap_qid_t qid,
unsigned long long psmid,
void *msg, size_t length)
{
register unsigned long reg0 asm ("0") = qid | 0x40000000UL;
register struct ap_queue_status reg1 asm ("1");
register unsigned long reg2 asm ("2") = (unsigned long) msg;
register unsigned long reg3 asm ("3") = (unsigned long) length;
register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32);
register unsigned long reg5 asm ("5") = psmid & 0xffffffff;
asm volatile (
"0: .long 0xb2ad0042\n" /* NQAP */
" brc 2,0b"
: "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3)
: "d" (reg4), "d" (reg5)
: "cc", "memory");
return reg1;
}
/**
* ap_dqap(): Receive message from adjunct processor queue.
* @qid: The AP queue number
* @psmid: Pointer to program supplied message identifier
* @msg: The message text
* @length: The message length
*
* Returns AP queue status structure.
* Condition code 1 on DQAP means the receive has taken place
* but only partially. The response is incomplete, hence the
* DQAP is repeated.
* Condition code 2 on DQAP also means the receive is incomplete,
* this time because a segment boundary was reached. Again, the
* DQAP is repeated.
* Note that gpr2 is used by the DQAP instruction to keep track of
* any 'residual' length, in case the instruction gets interrupted.
* Hence it gets zeroed before the instruction.
*/
static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
unsigned long long *psmid,
void *msg, size_t length)
{
register unsigned long reg0 asm("0") = qid | 0x80000000UL;
register struct ap_queue_status reg1 asm ("1");
register unsigned long reg2 asm("2") = 0UL;
register unsigned long reg4 asm("4") = (unsigned long) msg;
register unsigned long reg5 asm("5") = (unsigned long) length;
register unsigned long reg6 asm("6") = 0UL;
register unsigned long reg7 asm("7") = 0UL;
asm volatile(
"0: .long 0xb2ae0064\n" /* DQAP */
" brc 6,0b\n"
: "+d" (reg0), "=d" (reg1), "+d" (reg2),
"+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7)
: : "cc", "memory");
*psmid = (((unsigned long long) reg6) << 32) + reg7;
return reg1;
}
#endif /* _ASM_S390_AP_H_ */

12
arch/s390/include/asm/cpu_mf.h
View File

@ -2,7 +2,7 @@
/*
* CPU-measurement facilities
*
* Copyright IBM Corp. 2012
* Copyright IBM Corp. 2012, 2018
* Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
* Jan Glauber <jang@linux.vnet.ibm.com>
*/
@ -139,8 +139,14 @@ struct hws_trailer_entry {
unsigned char timestamp[16]; /* 16 - 31 timestamp */
unsigned long long reserved1; /* 32 -Reserved */
unsigned long long reserved2; /* */
unsigned long long progusage1; /* 48 - reserved for programming use */
unsigned long long progusage2; /* */
union { /* 48 - reserved for programming use */
struct {
unsigned int clock_base:1; /* in progusage2 */
unsigned long long progusage1:63;
unsigned long long progusage2;
};
unsigned long long progusage[2];
};
} __packed;
/* Load program parameter */

10
arch/s390/include/asm/gmap.h
View File

@ -9,6 +9,14 @@
#ifndef _ASM_S390_GMAP_H
#define _ASM_S390_GMAP_H
/* Generic bits for GMAP notification on DAT table entry changes. */
#define GMAP_NOTIFY_SHADOW 0x2
#define GMAP_NOTIFY_MPROT 0x1
/* Status bits only for huge segment entries */
#define _SEGMENT_ENTRY_GMAP_IN 0x8000 /* invalidation notify bit */
#define _SEGMENT_ENTRY_GMAP_UC 0x4000 /* dirty (migration) */
/**
* struct gmap_struct - guest address space
* @list: list head for the mm->context gmap list
@ -132,4 +140,6 @@ void gmap_pte_notify(struct mm_struct *, unsigned long addr, pte_t *,
int gmap_mprotect_notify(struct gmap *, unsigned long start,
unsigned long len, int prot);
void gmap_sync_dirty_log_pmd(struct gmap *gmap, unsigned long dirty_bitmap[4],
unsigned long gaddr, unsigned long vmaddr);
#endif /* _ASM_S390_GMAP_H */

5
arch/s390/include/asm/hugetlb.h
View File

@ -37,7 +37,10 @@ static inline int prepare_hugepage_range(struct file *file,
return 0;
}
#define arch_clear_hugepage_flags(page) do { } while (0)
static inline void arch_clear_hugepage_flags(struct page *page)
{
clear_bit(PG_arch_1, &page->flags);
}
static inline void huge_pte_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, unsigned long sz)

2
arch/s390/include/asm/lowcore.h
View File

@ -185,7 +185,7 @@ struct lowcore {
/* Transaction abort diagnostic block */
__u8 pgm_tdb[256]; /* 0x1800 */
__u8 pad_0x1900[0x2000-0x1900]; /* 0x1900 */
} __packed;
} __packed __aligned(8192);
#define S390_lowcore (*((struct lowcore *) 0))

2
arch/s390/include/asm/mmu.h
View File

@ -24,6 +24,8 @@ typedef struct {
unsigned int uses_skeys:1;
/* The mmu context uses CMM. */
unsigned int uses_cmm:1;
/* The gmaps associated with this context are allowed to use huge pages. */
unsigned int allow_gmap_hpage_1m:1;
} mm_context_t;
#define INIT_MM_CONTEXT(name) \

1
arch/s390/include/asm/mmu_context.h
View File

@ -32,6 +32,7 @@ static inline int init_new_context(struct task_struct *tsk,
mm->context.has_pgste = 0;
mm->context.uses_skeys = 0;
mm->context.uses_cmm = 0;
mm->context.allow_gmap_hpage_1m = 0;
#endif
switch (mm->context.asce_limit) {
case _REGION2_SIZE:

4
arch/s390/include/asm/nospec-insn.h
View File

@ -8,7 +8,7 @@
#ifdef __ASSEMBLY__
#ifdef CONFIG_EXPOLINE
#ifdef CC_USING_EXPOLINE
_LC_BR_R1 = __LC_BR_R1
@ -189,7 +189,7 @@ _LC_BR_R1 = __LC_BR_R1
.macro BASR_EX rsave,rtarget,ruse=%r1
basr \rsave,\rtarget
.endm
#endif
#endif /* CC_USING_EXPOLINE */
#endif /* __ASSEMBLY__ */

5
arch/s390/include/asm/pci.h
View File

@ -51,6 +51,10 @@ struct zpci_fmb_fmt2 {
u64 max_work_units;
};
struct zpci_fmb_fmt3 {
u64 tx_bytes;
};
struct zpci_fmb {
u32 format : 8;
u32 fmt_ind : 24;
@ -66,6 +70,7 @@ struct zpci_fmb {
struct zpci_fmb_fmt0 fmt0;
struct zpci_fmb_fmt1 fmt1;
struct zpci_fmb_fmt2 fmt2;
struct zpci_fmb_fmt3 fmt3;
};
} __packed __aligned(128);

13
arch/s390/include/asm/pgtable.h
View File

@ -268,8 +268,10 @@ static inline int is_module_addr(void *addr)
#define _REGION_ENTRY_BITS_LARGE 0xffffffff8000fe2fUL
/* Bits in the segment table entry */
#define _SEGMENT_ENTRY_BITS 0xfffffffffffffe33UL
#define _SEGMENT_ENTRY_BITS_LARGE 0xfffffffffff0ff33UL
#define _SEGMENT_ENTRY_BITS 0xfffffffffffffe33UL
#define _SEGMENT_ENTRY_BITS_LARGE 0xfffffffffff0ff33UL
#define _SEGMENT_ENTRY_HARDWARE_BITS 0xfffffffffffffe30UL
#define _SEGMENT_ENTRY_HARDWARE_BITS_LARGE 0xfffffffffff00730UL
#define _SEGMENT_ENTRY_ORIGIN_LARGE ~0xfffffUL /* large page address */
#define _SEGMENT_ENTRY_ORIGIN ~0x7ffUL/* page table origin */
#define _SEGMENT_ENTRY_PROTECT 0x200 /* segment protection bit */
@ -1101,7 +1103,8 @@ int ptep_shadow_pte(struct mm_struct *mm, unsigned long saddr,
pte_t *sptep, pte_t *tptep, pte_t pte);
void ptep_unshadow_pte(struct mm_struct *mm, unsigned long saddr, pte_t *ptep);
bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long address);
bool ptep_test_and_clear_uc(struct mm_struct *mm, unsigned long address,
pte_t *ptep);
int set_guest_storage_key(struct mm_struct *mm, unsigned long addr,
unsigned char key, bool nq);
int cond_set_guest_storage_key(struct mm_struct *mm, unsigned long addr,
@ -1116,6 +1119,10 @@ int set_pgste_bits(struct mm_struct *mm, unsigned long addr,
int get_pgste(struct mm_struct *mm, unsigned long hva, unsigned long *pgstep);
int pgste_perform_essa(struct mm_struct *mm, unsigned long hva, int orc,
unsigned long *oldpte, unsigned long *oldpgste);
void gmap_pmdp_csp(struct mm_struct *mm, unsigned long vmaddr);
void gmap_pmdp_invalidate(struct mm_struct *mm, unsigned long vmaddr);
void gmap_pmdp_idte_local(struct mm_struct *mm, unsigned long vmaddr);
void gmap_pmdp_idte_global(struct mm_struct *mm, unsigned long vmaddr);
/*
* Certain architectures need to do special things when PTEs

6
arch/s390/include/asm/purgatory.h
View File

@ -13,11 +13,5 @@
int verify_sha256_digest(void);
extern u64 kernel_entry;
extern u64 kernel_type;
extern u64 crash_start;
extern u64 crash_size;
#endif /* __ASSEMBLY__ */
#endif /* _S390_PURGATORY_H_ */

1
arch/s390/include/asm/qdio.h
View File

@ -262,7 +262,6 @@ struct qdio_outbuf_state {
void *user;
};
#define QDIO_OUTBUF_STATE_FLAG_NONE 0x00
#define QDIO_OUTBUF_STATE_FLAG_PENDING 0x01
#define CHSC_AC1_INITIATE_INPUTQ 0x80

2
arch/s390/include/asm/sections.h
View File

@ -4,6 +4,4 @@
#include <asm-generic/sections.h>
extern char _ehead[];
#endif

4
arch/s390/include/asm/setup.h
View File

@ -9,8 +9,10 @@
#include <linux/const.h>
#include <uapi/asm/setup.h>
#define EP_OFFSET 0x10008
#define EP_STRING "S390EP"
#define PARMAREA 0x10400
#define PARMAREA_END 0x11000
/*
* Machine features detected in early.c

10
arch/s390/include/uapi/asm/chsc.h
View File

@ -23,29 +23,29 @@ struct chsc_async_header {
__u32 key : 4;
__u32 : 28;
struct subchannel_id sid;
} __attribute__ ((packed));
};
struct chsc_async_area {
struct chsc_async_header header;
__u8 data[CHSC_SIZE - sizeof(struct chsc_async_header)];
} __attribute__ ((packed));
};
struct chsc_header {
__u16 length;
__u16 code;
} __attribute__ ((packed));
};
struct chsc_sync_area {
struct chsc_header header;
__u8 data[CHSC_SIZE - sizeof(struct chsc_header)];
} __attribute__ ((packed));
};
struct chsc_response_struct {
__u16 length;
__u16 code;
__u32 parms;
__u8 data[CHSC_SIZE - 2 * sizeof(__u16) - sizeof(__u32)];
} __attribute__ ((packed));
};
struct chsc_chp_cd {
struct chp_id chpid;

24
arch/s390/kernel/Makefile
View File

@ -9,38 +9,20 @@ ifdef CONFIG_FUNCTION_TRACER
CFLAGS_REMOVE_ftrace.o = $(CC_FLAGS_FTRACE)
# Do not trace early setup code
CFLAGS_REMOVE_als.o = $(CC_FLAGS_FTRACE)
CFLAGS_REMOVE_early.o = $(CC_FLAGS_FTRACE)
CFLAGS_REMOVE_early_nobss.o = $(CC_FLAGS_FTRACE)
endif
GCOV_PROFILE_als.o := n
GCOV_PROFILE_early.o := n
GCOV_PROFILE_early_nobss.o := n
KCOV_INSTRUMENT_als.o := n
KCOV_INSTRUMENT_early.o := n
KCOV_INSTRUMENT_early_nobss.o := n
UBSAN_SANITIZE_als.o := n
UBSAN_SANITIZE_early.o := n
UBSAN_SANITIZE_early_nobss.o := n
#
# Use -march=z900 for als.c to be able to print an error
# message if the kernel is started on a machine which is too old
#
ifneq ($(CC_FLAGS_MARCH),-march=z900)
CFLAGS_REMOVE_als.o += $(CC_FLAGS_MARCH)
CFLAGS_REMOVE_als.o += $(CC_FLAGS_EXPOLINE)
CFLAGS_als.o += -march=z900
AFLAGS_REMOVE_head.o += $(CC_FLAGS_MARCH)
AFLAGS_head.o += -march=z900
endif
CFLAGS_als.o += -D__NO_FORTIFY
#
# Passing null pointers is ok for smp code, since we access the lowcore here.
#
@ -61,13 +43,13 @@ CFLAGS_ptrace.o += -DUTS_MACHINE='"$(UTS_MACHINE)"'
obj-y := traps.o time.o process.o base.o early.o setup.o idle.o vtime.o
obj-y += processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
obj-y += debug.o irq.o ipl.o dis.o diag.o vdso.o als.o early_nobss.o
obj-y += debug.o irq.o ipl.o dis.o diag.o vdso.o early_nobss.o
obj-y += sysinfo.o jump_label.o lgr.o os_info.o machine_kexec.o pgm_check.o
obj-y += runtime_instr.o cache.o fpu.o dumpstack.o guarded_storage.o sthyi.o
obj-y += entry.o reipl.o relocate_kernel.o kdebugfs.o alternative.o
obj-y += nospec-branch.o
extra-y += head.o head64.o vmlinux.lds
extra-y += head64.o vmlinux.lds
obj-$(CONFIG_SYSFS) += nospec-sysfs.o
CFLAGS_REMOVE_nospec-branch.o += $(CC_FLAGS_EXPOLINE)
@ -99,5 +81,5 @@ obj-$(CONFIG_TRACEPOINTS) += trace.o
obj-y += vdso64/
obj-$(CONFIG_COMPAT) += vdso32/
chkbss := head.o head64.o als.o early_nobss.o
chkbss := head64.o early_nobss.o
include $(srctree)/arch/s390/scripts/Makefile.chkbss

104
arch/s390/kernel/crash_dump.c
View File

@ -306,6 +306,15 @@ static void *kzalloc_panic(int len)
return rc;
}
static const char *nt_name(Elf64_Word type)
{
const char *name = "LINUX";
if (type == NT_PRPSINFO || type == NT_PRSTATUS || type == NT_PRFPREG)
name = KEXEC_CORE_NOTE_NAME;
return name;
}
/*
* Initialize ELF note
*/
@ -332,11 +341,26 @@ static void *nt_init_name(void *buf, Elf64_Word type, void *desc, int d_len,
static inline void *nt_init(void *buf, Elf64_Word type, void *desc, int d_len)
{
const char *note_name = "LINUX";
return nt_init_name(buf, type, desc, d_len, nt_name(type));
}
if (type == NT_PRPSINFO || type == NT_PRSTATUS || type == NT_PRFPREG)
note_name = KEXEC_CORE_NOTE_NAME;
return nt_init_name(buf, type, desc, d_len, note_name);
/*
* Calculate the size of ELF note
*/
static size_t nt_size_name(int d_len, const char *name)
{
size_t size;
size = sizeof(Elf64_Nhdr);
size += roundup(strlen(name) + 1, 4);
size += roundup(d_len, 4);
return size;
}
static inline size_t nt_size(Elf64_Word type, int d_len)
{
return nt_size_name(d_len, nt_name(type));
}
/*
@ -374,6 +398,29 @@ static void *fill_cpu_elf_notes(void *ptr, int cpu, struct save_area *sa)
return ptr;
}
/*
* Calculate size of ELF notes per cpu
*/
static size_t get_cpu_elf_notes_size(void)
{
struct save_area *sa = NULL;
size_t size;
size = nt_size(NT_PRSTATUS, sizeof(struct elf_prstatus));
size += nt_size(NT_PRFPREG, sizeof(elf_fpregset_t));
size += nt_size(NT_S390_TIMER, sizeof(sa->timer));
size += nt_size(NT_S390_TODCMP, sizeof(sa->todcmp));
size += nt_size(NT_S390_TODPREG, sizeof(sa->todpreg));
size += nt_size(NT_S390_CTRS, sizeof(sa->ctrs));
size += nt_size(NT_S390_PREFIX, sizeof(sa->prefix));
if (MACHINE_HAS_VX) {
size += nt_size(NT_S390_VXRS_HIGH, sizeof(sa->vxrs_high));
size += nt_size(NT_S390_VXRS_LOW, sizeof(sa->vxrs_low));
}
return size;
}
/*
* Initialize prpsinfo note (new kernel)
*/
@ -429,6 +476,30 @@ static void *nt_vmcoreinfo(void *ptr)
return nt_init_name(ptr, 0, vmcoreinfo, size, "VMCOREINFO");
}
static size_t nt_vmcoreinfo_size(void)
{
const char *name = "VMCOREINFO";
char nt_name[11];
Elf64_Nhdr note;
void *addr;
if (copy_oldmem_kernel(&addr, &S390_lowcore.vmcore_info, sizeof(addr)))
return 0;
if (copy_oldmem_kernel(&note, addr, sizeof(note)))
return 0;
memset(nt_name, 0, sizeof(nt_name));
if (copy_oldmem_kernel(nt_name, addr + sizeof(note),
sizeof(nt_name) - 1))
return 0;
if (strcmp(nt_name, name) != 0)
return 0;
return nt_size_name(note.n_descsz, name);
}
/*
* Initialize final note (needed for /proc/vmcore code)
*/
@ -539,6 +610,27 @@ static void *notes_init(Elf64_Phdr *phdr, void *ptr, u64 notes_offset)
return ptr;
}
static size_t get_elfcorehdr_size(int mem_chunk_cnt)
{
size_t size;
size = sizeof(Elf64_Ehdr);
/* PT_NOTES */
size += sizeof(Elf64_Phdr);
/* nt_prpsinfo */
size += nt_size(NT_PRPSINFO, sizeof(struct elf_prpsinfo));
/* regsets */
size += get_cpu_cnt() * get_cpu_elf_notes_size();
/* nt_vmcoreinfo */
size += nt_vmcoreinfo_size();
/* nt_final */
size += sizeof(Elf64_Nhdr);
/* PT_LOADS */
size += mem_chunk_cnt * sizeof(Elf64_Phdr);
return size;
}
/*
* Create ELF core header (new kernel)
*/
@ -566,8 +658,8 @@ int elfcorehdr_alloc(unsigned long long *addr, unsigned long long *size)
mem_chunk_cnt = get_mem_chunk_cnt();
alloc_size = 0x1000 + get_cpu_cnt() * 0x4a0 +
mem_chunk_cnt * sizeof(Elf64_Phdr);
alloc_size = get_elfcorehdr_size(mem_chunk_cnt);
hdr = kzalloc_panic(alloc_size);
/* Init elf header */
ptr = ehdr_init(hdr, mem_chunk_cnt);

12
arch/s390/kernel/early.c
View File

@ -331,8 +331,20 @@ static void __init setup_boot_command_line(void)
append_to_cmdline(append_ipl_scpdata);
}
static void __init check_image_bootable(void)
{
if (!memcmp(EP_STRING, (void *)EP_OFFSET, strlen(EP_STRING)))
return;
sclp_early_printk("Linux kernel boot failure: An attempt to boot a vmlinux ELF image failed.\n");
sclp_early_printk("This image does not contain all parts necessary for starting up. Use\n");
sclp_early_printk("bzImage or arch/s390/boot/compressed/vmlinux instead.\n");
disabled_wait(0xbadb007);
}
void __init startup_init(void)
{
check_image_bootable();
time_early_init();
init_kernel_storage_key();
lockdep_off();

1
arch/s390/kernel/entry.h
View File

@ -83,7 +83,6 @@ long sys_s390_sthyi(unsigned long function_code, void __user *buffer, u64 __user
DECLARE_PER_CPU(u64, mt_cycles[8]);
void verify_facilities(void);
void gs_load_bc_cb(struct pt_regs *regs);
void set_fs_fixup(void);

43
arch/s390/kernel/head64.S
View File

@ -48,11 +48,23 @@ ENTRY(startup_continue)
# Early machine initialization and detection functions.
#
brasl %r14,startup_init
lpswe .Lentry-.LPG1(13) # jump to _stext in primary-space,
# virtual and never return ...
# check control registers
stctg %c0,%c15,0(%r15)
oi 6(%r15),0x60 # enable sigp emergency & external call
oi 4(%r15),0x10 # switch on low address proctection
lctlg %c0,%c15,0(%r15)
lam 0,15,.Laregs-.LPG1(%r13) # load acrs needed by uaccess
brasl %r14,start_kernel # go to C code
#
# We returned from start_kernel ?!? PANIK
#
basr %r13,0
lpswe .Ldw-.(%r13) # load disabled wait psw
.align 16
.LPG1:
.Lentry:.quad 0x0000000180000000,_stext
.Lctl: .quad 0x04040000 # cr0: AFP registers & secondary space
.quad 0 # cr1: primary space segment table
.quad .Lduct # cr2: dispatchable unit control table
@ -85,30 +97,5 @@ ENTRY(startup_continue)
.endr
.Llinkage_stack:
.long 0,0,0x89000000,0,0,0,0x8a000000,0
ENTRY(_ehead)
.org 0x100000 - 0x11000 # head.o ends at 0x11000
#
# startup-code, running in absolute addressing mode
#
ENTRY(_stext)
basr %r13,0 # get base
.LPG3:
# check control registers
stctg %c0,%c15,0(%r15)
oi 6(%r15),0x60 # enable sigp emergency & external call
oi 4(%r15),0x10 # switch on low address proctection
lctlg %c0,%c15,0(%r15)
lam 0,15,.Laregs-.LPG3(%r13) # load acrs needed by uaccess
brasl %r14,start_kernel # go to C code
#
# We returned from start_kernel ?!? PANIK
#
basr %r13,0
lpswe .Ldw-.(%r13) # load disabled wait psw
.align 8
.Ldw: .quad 0x0002000180000000,0x0000000000000000
.Laregs:.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0

12
arch/s390/kernel/nospec-branch.c
View File

@ -35,6 +35,8 @@ early_param("nospec", nospec_setup_early);
static int __init nospec_report(void)
{
if (test_facility(156))
pr_info("Spectre V2 mitigation: etokens\n");
if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable)
pr_info("Spectre V2 mitigation: execute trampolines\n");
if (__test_facility(82, S390_lowcore.alt_stfle_fac_list))
@ -56,7 +58,15 @@ early_param("nospectre_v2", nospectre_v2_setup_early);
void __init nospec_auto_detect(void)
{
if (IS_ENABLED(CC_USING_EXPOLINE)) {
if (test_facility(156)) {
/*
* The machine supports etokens.
* Disable expolines and disable nobp.
*/
if (IS_ENABLED(CC_USING_EXPOLINE))
nospec_disable = 1;
__clear_facility(82, S390_lowcore.alt_stfle_fac_list);
} else if (IS_ENABLED(CC_USING_EXPOLINE)) {
/*
* The kernel has been compiled with expolines.
* Keep expolines enabled and disable nobp.

2
arch/s390/kernel/nospec-sysfs.c
View File

@ -13,6 +13,8 @@ ssize_t cpu_show_spectre_v1(struct device *dev,
ssize_t cpu_show_spectre_v2(struct device *dev,
struct device_attribute *attr, char *buf)
{
if (test_facility(156))
return sprintf(buf, "Mitigation: etokens\n");
if (IS_ENABLED(CC_USING_EXPOLINE) && !nospec_disable)
return sprintf(buf, "Mitigation: execute trampolines\n");
if (__test_facility(82, S390_lowcore.alt_stfle_fac_list))

14
arch/s390/kernel/perf_cpum_sf.c
View File

@ -2,7 +2,7 @@
/*
* Performance event support for the System z CPU-measurement Sampling Facility
*
* Copyright IBM Corp. 2013
* Copyright IBM Corp. 2013, 2018
* Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
*/
#define KMSG_COMPONENT "cpum_sf"
@ -1587,6 +1587,17 @@ static void aux_buffer_free(void *data)
"%lu SDBTs\n", num_sdbt);
}
static void aux_sdb_init(unsigned long sdb)
{
struct hws_trailer_entry *te;
te = (struct hws_trailer_entry *)trailer_entry_ptr(sdb);
/* Save clock base */
te->clock_base = 1;
memcpy(&te->progusage2, &tod_clock_base[1], 8);
}
/*
* aux_buffer_setup() - Setup AUX buffer for diagnostic mode sampling
* @cpu: On which to allocate, -1 means current
@ -1666,6 +1677,7 @@ static void *aux_buffer_setup(int cpu, void **pages, int nr_pages,
/* Tail is the entry in a SDBT */
*tail = (unsigned long)pages[i];
aux->sdb_index[i] = (unsigned long)pages[i];
aux_sdb_init((unsigned long)pages[i]);
}
sfb->num_sdb = nr_pages;

6
arch/s390/kernel/perf_regs.c
View File

@ -12,9 +12,6 @@ u64 perf_reg_value(struct pt_regs *regs, int idx)
{
freg_t fp;
if (WARN_ON_ONCE((u32)idx >= PERF_REG_S390_MAX))
return 0;
if (idx >= PERF_REG_S390_R0 && idx <= PERF_REG_S390_R15)
return regs->gprs[idx];
@ -33,7 +30,8 @@ u64 perf_reg_value(struct pt_regs *regs, int idx)
if (idx == PERF_REG_S390_PC)
return regs->psw.addr;
return regs->gprs[idx];
WARN_ON_ONCE((u32)idx >= PERF_REG_S390_MAX);
return 0;
}
#define REG_RESERVED (~((1UL << PERF_REG_S390_MAX) - 1))

4
arch/s390/kernel/setup.c
View File

@ -674,12 +674,12 @@ static void __init reserve_kernel(void)
#ifdef CONFIG_DMA_API_DEBUG
/*
* DMA_API_DEBUG code stumbles over addresses from the
* range [_ehead, _stext]. Mark the memory as reserved
* range [PARMAREA_END, _stext]. Mark the memory as reserved
* so it is not used for CONFIG_DMA_API_DEBUG=y.
*/
memblock_reserve(0, PFN_PHYS(start_pfn));
#else
memblock_reserve(0, (unsigned long)_ehead);
memblock_reserve(0, PARMAREA_END);
memblock_reserve((unsigned long)_stext, PFN_PHYS(start_pfn)
- (unsigned long)_stext);
#endif

4
arch/s390/kernel/sysinfo.c
View File

@ -59,6 +59,8 @@ int stsi(void *sysinfo, int fc, int sel1, int sel2)
}
EXPORT_SYMBOL(stsi);
#ifdef CONFIG_PROC_FS
static bool convert_ext_name(unsigned char encoding, char *name, size_t len)
{
switch (encoding) {
@ -301,6 +303,8 @@ static int __init sysinfo_create_proc(void)
}
device_initcall(sysinfo_create_proc);
#endif /* CONFIG_PROC_FS */
/*
* Service levels interface.
*/

44
arch/s390/kernel/topology.c
View File

@ -579,41 +579,33 @@ early_param("topology", topology_setup);
static int topology_ctl_handler(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
unsigned int len;
int enabled = topology_is_enabled();
int new_mode;
char buf[2];
int zero = 0;
int one = 1;
int rc;
struct ctl_table ctl_entry = {
.procname = ctl->procname,
.data = &enabled,
.maxlen = sizeof(int),
.extra1 = &zero,
.extra2 = &one,
};
rc = proc_douintvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
if (rc < 0 || !write)
return rc;
if (!*lenp || *ppos) {
*lenp = 0;
return 0;
}
if (!write) {
strncpy(buf, topology_is_enabled() ? "1\n" : "0\n",
ARRAY_SIZE(buf));
len = strnlen(buf, ARRAY_SIZE(buf));
if (len > *lenp)
len = *lenp;
if (copy_to_user(buffer, buf, len))
return -EFAULT;
goto out;
}
len = *lenp;
if (copy_from_user(buf, buffer, len > sizeof(buf) ? sizeof(buf) : len))
return -EFAULT;
if (buf[0] != '0' && buf[0] != '1')
return -EINVAL;
mutex_lock(&smp_cpu_state_mutex);
new_mode = topology_get_mode(buf[0] == '1');
new_mode = topology_get_mode(enabled);
if (topology_mode != new_mode) {
topology_mode = new_mode;
topology_schedule_update();
}
mutex_unlock(&smp_cpu_state_mutex);
topology_flush_work();
out:
*lenp = len;
*ppos += len;
return 0;
return rc;
}
static struct ctl_table topology_ctl_table[] = {

2
arch/s390/kernel/vdso.c
View File

@ -47,7 +47,7 @@ static struct page **vdso64_pagelist;
*/
unsigned int __read_mostly vdso_enabled = 1;
static int vdso_fault(const struct vm_special_mapping *sm,
static vm_fault_t vdso_fault(const struct vm_special_mapping *sm,
struct vm_area_struct *vma, struct vm_fault *vmf)
{
struct page **vdso_pagelist;

13
arch/s390/kernel/vmlinux.lds.S
View File

@ -19,7 +19,7 @@
OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
OUTPUT_ARCH(s390:64-bit)
ENTRY(startup)
ENTRY(startup_continue)
jiffies = jiffies_64;
PHDRS {
@ -30,16 +30,12 @@ PHDRS {
SECTIONS
{
. = 0x00000000;
. = 0x100000;
_stext = .; /* Start of text section */
.text : {
/* Text and read-only data */
_text = .;
HEAD_TEXT
/*
* E.g. perf doesn't like symbols starting at address zero,
* therefore skip the initial PSW and channel program located
* at address zero and let _text start at 0x200.
*/
_text = 0x200;
TEXT_TEXT
SCHED_TEXT
CPUIDLE_TEXT
@ -47,6 +43,7 @@ SECTIONS
KPROBES_TEXT
IRQENTRY_TEXT
SOFTIRQENTRY_TEXT
*(.text.*_indirect_*)
*(.fixup)
*(.gnu.warning)
} :text = 0x0700

82
arch/s390/kvm/kvm-s390.c
View File

@ -172,6 +172,10 @@ static int nested;
module_param(nested, int, S_IRUGO);
MODULE_PARM_DESC(nested, "Nested virtualization support");
/* allow 1m huge page guest backing, if !nested */
static int hpage;
module_param(hpage, int, 0444);
MODULE_PARM_DESC(hpage, "1m huge page backing support");
/*
* For now we handle at most 16 double words as this is what the s390 base
@ -475,6 +479,11 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_S390_AIS_MIGRATION:
r = 1;
break;
case KVM_CAP_S390_HPAGE_1M:
r = 0;
if (hpage)
r = 1;
break;
case KVM_CAP_S390_MEM_OP:
r = MEM_OP_MAX_SIZE;
break;
@ -511,19 +520,30 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
}
static void kvm_s390_sync_dirty_log(struct kvm *kvm,
struct kvm_memory_slot *memslot)
struct kvm_memory_slot *memslot)
{
int i;
gfn_t cur_gfn, last_gfn;
unsigned long address;
unsigned long gaddr, vmaddr;
struct gmap *gmap = kvm->arch.gmap;
DECLARE_BITMAP(bitmap, _PAGE_ENTRIES);
/* Loop over all guest pages */
/* Loop over all guest segments */
cur_gfn = memslot->base_gfn;
last_gfn = memslot->base_gfn + memslot->npages;
for (cur_gfn = memslot->base_gfn; cur_gfn <= last_gfn; cur_gfn++) {
address = gfn_to_hva_memslot(memslot, cur_gfn);
for (; cur_gfn <= last_gfn; cur_gfn += _PAGE_ENTRIES) {
gaddr = gfn_to_gpa(cur_gfn);
vmaddr = gfn_to_hva_memslot(memslot, cur_gfn);
if (kvm_is_error_hva(vmaddr))
continue;
bitmap_zero(bitmap, _PAGE_ENTRIES);
gmap_sync_dirty_log_pmd(gmap, bitmap, gaddr, vmaddr);
for (i = 0; i < _PAGE_ENTRIES; i++) {
if (test_bit(i, bitmap))
mark_page_dirty(kvm, cur_gfn + i);
}
if (test_and_clear_guest_dirty(gmap->mm, address))
mark_page_dirty(kvm, cur_gfn);
if (fatal_signal_pending(current))
return;
cond_resched();
@ -667,6 +687,27 @@ static int kvm_vm_ioctl_enable_cap(struct kvm *kvm, struct kvm_enable_cap *cap)
VM_EVENT(kvm, 3, "ENABLE: CAP_S390_GS %s",
r ? "(not available)" : "(success)");
break;
case KVM_CAP_S390_HPAGE_1M:
mutex_lock(&kvm->lock);
if (kvm->created_vcpus)
r = -EBUSY;
else if (!hpage || kvm->arch.use_cmma)
r = -EINVAL;
else {
r = 0;
kvm->mm->context.allow_gmap_hpage_1m = 1;
/*
* We might have to create fake 4k page
* tables. To avoid that the hardware works on
* stale PGSTEs, we emulate these instructions.
*/
kvm->arch.use_skf = 0;
kvm->arch.use_pfmfi = 0;
}
mutex_unlock(&kvm->lock);
VM_EVENT(kvm, 3, "ENABLE: CAP_S390_HPAGE %s",
r ? "(not available)" : "(success)");
break;
case KVM_CAP_S390_USER_STSI:
VM_EVENT(kvm, 3, "%s", "ENABLE: CAP_S390_USER_STSI");
kvm->arch.user_stsi = 1;
@ -714,10 +755,13 @@ static int kvm_s390_set_mem_control(struct kvm *kvm, struct kvm_device_attr *att
if (!sclp.has_cmma)
break;
ret = -EBUSY;
VM_EVENT(kvm, 3, "%s", "ENABLE: CMMA support");
mutex_lock(&kvm->lock);
if (!kvm->created_vcpus) {
if (kvm->created_vcpus)
ret = -EBUSY;
else if (kvm->mm->context.allow_gmap_hpage_1m)
ret = -EINVAL;
else {
kvm->arch.use_cmma = 1;
/* Not compatible with cmma. */
kvm->arch.use_pfmfi = 0;
@ -1540,6 +1584,7 @@ static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
uint8_t *keys;
uint64_t hva;
int srcu_idx, i, r = 0;
bool unlocked;
if (args->flags != 0)
return -EINVAL;
@ -1564,9 +1609,11 @@ static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
if (r)
goto out;
i = 0;
down_read(&current->mm->mmap_sem);
srcu_idx = srcu_read_lock(&kvm->srcu);
for (i = 0; i < args->count; i++) {
while (i < args->count) {
unlocked = false;
hva = gfn_to_hva(kvm, args->start_gfn + i);
if (kvm_is_error_hva(hva)) {
r = -EFAULT;
@ -1580,8 +1627,14 @@ static long kvm_s390_set_skeys(struct kvm *kvm, struct kvm_s390_skeys *args)
}
r = set_guest_storage_key(current->mm, hva, keys[i], 0);
if (r)
break;
if (r) {
r = fixup_user_fault(current, current->mm, hva,
FAULT_FLAG_WRITE, &unlocked);
if (r)
break;
}
if (!r)
i++;
}
srcu_read_unlock(&kvm->srcu, srcu_idx);
up_read(&current->mm->mmap_sem);
@ -4082,6 +4135,11 @@ static int __init kvm_s390_init(void)
return -ENODEV;
}
if (nested && hpage) {
pr_info("nested (vSIE) and hpage (huge page backing) can currently not be activated concurrently");
return -EINVAL;
}
for (i = 0; i < 16; i++)
kvm_s390_fac_base[i] |=
S390_lowcore.stfle_fac_list[i] & nonhyp_mask(i);

105
arch/s390/kvm/priv.c
View File

@ -246,9 +246,10 @@ static int try_handle_skey(struct kvm_vcpu *vcpu)
static int handle_iske(struct kvm_vcpu *vcpu)
{
unsigned long addr;
unsigned long gaddr, vmaddr;
unsigned char key;
int reg1, reg2;
bool unlocked;
int rc;
vcpu->stat.instruction_iske++;
@ -262,18 +263,28 @@ static int handle_iske(struct kvm_vcpu *vcpu)
kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
addr = kvm_s390_logical_to_effective(vcpu, addr);
addr = kvm_s390_real_to_abs(vcpu, addr);
addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(addr));
if (kvm_is_error_hva(addr))
gaddr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
gaddr = kvm_s390_logical_to_effective(vcpu, gaddr);
gaddr = kvm_s390_real_to_abs(vcpu, gaddr);
vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(gaddr));
if (kvm_is_error_hva(vmaddr))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
retry:
unlocked = false;
down_read(&current->mm->mmap_sem);
rc = get_guest_storage_key(current->mm, addr, &key);
up_read(&current->mm->mmap_sem);
rc = get_guest_storage_key(current->mm, vmaddr, &key);
if (rc) {
rc = fixup_user_fault(current, current->mm, vmaddr,
FAULT_FLAG_WRITE, &unlocked);
if (!rc) {
up_read(&current->mm->mmap_sem);
goto retry;
}
}
if (rc)
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
up_read(&current->mm->mmap_sem);
vcpu->run->s.regs.gprs[reg1] &= ~0xff;
vcpu->run->s.regs.gprs[reg1] |= key;
return 0;
@ -281,8 +292,9 @@ static int handle_iske(struct kvm_vcpu *vcpu)
static int handle_rrbe(struct kvm_vcpu *vcpu)
{
unsigned long addr;
unsigned long vmaddr, gaddr;
int reg1, reg2;
bool unlocked;
int rc;
vcpu->stat.instruction_rrbe++;
@ -296,19 +308,27 @@ static int handle_rrbe(struct kvm_vcpu *vcpu)
kvm_s390_get_regs_rre(vcpu, &reg1, &reg2);
addr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
addr = kvm_s390_logical_to_effective(vcpu, addr);
addr = kvm_s390_real_to_abs(vcpu, addr);
addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(addr));
if (kvm_is_error_hva(addr))
gaddr = vcpu->run->s.regs.gprs[reg2] & PAGE_MASK;
gaddr = kvm_s390_logical_to_effective(vcpu, gaddr);
gaddr = kvm_s390_real_to_abs(vcpu, gaddr);
vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(gaddr));
if (kvm_is_error_hva(vmaddr))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
retry:
unlocked = false;
down_read(&current->mm->mmap_sem);
rc = reset_guest_reference_bit(current->mm, addr);
up_read(&current->mm->mmap_sem);
rc = reset_guest_reference_bit(current->mm, vmaddr);
if (rc < 0) {
rc = fixup_user_fault(current, current->mm, vmaddr,
FAULT_FLAG_WRITE, &unlocked);
if (!rc) {
up_read(&current->mm->mmap_sem);
goto retry;
}
}
if (rc < 0)
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
up_read(&current->mm->mmap_sem);
kvm_s390_set_psw_cc(vcpu, rc);
return 0;
}
@ -323,6 +343,7 @@ static int handle_sske(struct kvm_vcpu *vcpu)
unsigned long start, end;
unsigned char key, oldkey;
int reg1, reg2;
bool unlocked;
int rc;
vcpu->stat.instruction_sske++;
@ -355,19 +376,28 @@ static int handle_sske(struct kvm_vcpu *vcpu)
}
while (start != end) {
unsigned long addr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
unsigned long vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
unlocked = false;
if (kvm_is_error_hva(addr))
if (kvm_is_error_hva(vmaddr))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
down_read(&current->mm->mmap_sem);
rc = cond_set_guest_storage_key(current->mm, addr, key, &oldkey,
rc = cond_set_guest_storage_key(current->mm, vmaddr, key, &oldkey,
m3 & SSKE_NQ, m3 & SSKE_MR,
m3 & SSKE_MC);
up_read(&current->mm->mmap_sem);
if (rc < 0)
if (rc < 0) {
rc = fixup_user_fault(current, current->mm, vmaddr,
FAULT_FLAG_WRITE, &unlocked);
rc = !rc ? -EAGAIN : rc;
}
if (rc == -EFAULT)
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
start += PAGE_SIZE;
up_read(&current->mm->mmap_sem);
if (rc >= 0)
start += PAGE_SIZE;
}
if (m3 & (SSKE_MC | SSKE_MR)) {
@ -948,15 +978,16 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
}
while (start != end) {
unsigned long useraddr;
unsigned long vmaddr;
bool unlocked = false;
/* Translate guest address to host address */
useraddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
if (kvm_is_error_hva(useraddr))
vmaddr = gfn_to_hva(vcpu->kvm, gpa_to_gfn(start));
if (kvm_is_error_hva(vmaddr))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
if (vcpu->run->s.regs.gprs[reg1] & PFMF_CF) {
if (clear_user((void __user *)useraddr, PAGE_SIZE))
if (clear_user((void __user *)vmaddr, PAGE_SIZE))
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
}
@ -966,14 +997,20 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
if (rc)
return rc;
down_read(&current->mm->mmap_sem);
rc = cond_set_guest_storage_key(current->mm, useraddr,
rc = cond_set_guest_storage_key(current->mm, vmaddr,
key, NULL, nq, mr, mc);
up_read(&current->mm->mmap_sem);
if (rc < 0)
if (rc < 0) {
rc = fixup_user_fault(current, current->mm, vmaddr,
FAULT_FLAG_WRITE, &unlocked);
rc = !rc ? -EAGAIN : rc;
}
if (rc == -EFAULT)
return kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
}
start += PAGE_SIZE;
up_read(&current->mm->mmap_sem);
if (rc >= 0)
start += PAGE_SIZE;
}
}
if (vcpu->run->s.regs.gprs[reg1] & PFMF_FSC) {
if (psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_64BIT) {

16
arch/s390/lib/mem.S
View File

@ -17,7 +17,7 @@
ENTRY(memmove)
ltgr %r4,%r4
lgr %r1,%r2
bzr %r14
jz .Lmemmove_exit
aghi %r4,-1
clgr %r2,%r3
jnh .Lmemmove_forward
@ -36,6 +36,7 @@ ENTRY(memmove)
.Lmemmove_forward_remainder:
larl %r5,.Lmemmove_mvc
ex %r4,0(%r5)
.Lmemmove_exit:
BR_EX %r14
.Lmemmove_reverse:
ic %r0,0(%r4,%r3)
@ -65,7 +66,7 @@ EXPORT_SYMBOL(memmove)
*/
ENTRY(memset)
ltgr %r4,%r4
bzr %r14
jz .Lmemset_exit
ltgr %r3,%r3
jnz .Lmemset_fill
aghi %r4,-1
@ -80,6 +81,7 @@ ENTRY(memset)
.Lmemset_clear_remainder:
larl %r3,.Lmemset_xc
ex %r4,0(%r3)
.Lmemset_exit:
BR_EX %r14
.Lmemset_fill:
cghi %r4,1
@ -115,7 +117,7 @@ EXPORT_SYMBOL(memset)
*/
ENTRY(memcpy)
ltgr %r4,%r4
bzr %r14
jz .Lmemcpy_exit
aghi %r4,-1
srlg %r5,%r4,8
ltgr %r5,%r5
@ -124,6 +126,7 @@ ENTRY(memcpy)
.Lmemcpy_remainder:
larl %r5,.Lmemcpy_mvc
ex %r4,0(%r5)
.Lmemcpy_exit:
BR_EX %r14
.Lmemcpy_loop:
mvc 0(256,%r1),0(%r3)
@ -145,9 +148,9 @@ EXPORT_SYMBOL(memcpy)
.macro __MEMSET bits,bytes,insn
ENTRY(__memset\bits)
ltgr %r4,%r4
bzr %r14
jz .L__memset_exit\bits
cghi %r4,\bytes
je .L__memset_exit\bits
je .L__memset_store\bits
aghi %r4,-(\bytes+1)
srlg %r5,%r4,8
ltgr %r5,%r5
@ -163,8 +166,9 @@ ENTRY(__memset\bits)
larl %r5,.L__memset_mvc\bits
ex %r4,0(%r5)
BR_EX %r14
.L__memset_exit\bits:
.L__memset_store\bits:
\insn %r3,0(%r2)
.L__memset_exit\bits:
BR_EX %r14
.L__memset_mvc\bits:
mvc \bytes(1,%r1),0(%r1)

74
arch/s390/mm/cmm.c
View File

@ -191,12 +191,7 @@ static void cmm_set_timer(void)
del_timer(&cmm_timer);
return;
}
if (timer_pending(&cmm_timer)) {
if (mod_timer(&cmm_timer, jiffies + cmm_timeout_seconds*HZ))
return;
}
cmm_timer.expires = jiffies + cmm_timeout_seconds*HZ;
add_timer(&cmm_timer);
mod_timer(&cmm_timer, jiffies + cmm_timeout_seconds * HZ);
}
static void cmm_timer_fn(struct timer_list *unused)
@ -251,45 +246,42 @@ static int cmm_skip_blanks(char *cp, char **endp)
return str != cp;
}
static struct ctl_table cmm_table[];
static int cmm_pages_handler(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
char buf[16], *p;
unsigned int len;
long nr;
long nr = cmm_get_pages();
struct ctl_table ctl_entry = {
.procname = ctl->procname,
.data = &nr,
.maxlen = sizeof(long),
};
int rc;
if (!*lenp || (*ppos && !write)) {
*lenp = 0;
return 0;
}
rc = proc_doulongvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
if (rc < 0 || !write)
return rc;
if (write) {
len = *lenp;
if (copy_from_user(buf, buffer,
len > sizeof(buf) ? sizeof(buf) : len))
return -EFAULT;
buf[sizeof(buf) - 1] = '\0';
cmm_skip_blanks(buf, &p);
nr = simple_strtoul(p, &p, 0);
if (ctl == &cmm_table[0])
cmm_set_pages(nr);
else
cmm_add_timed_pages(nr);
} else {
if (ctl == &cmm_table[0])
nr = cmm_get_pages();
else
nr = cmm_get_timed_pages();
len = sprintf(buf, "%ld\n", nr);
if (len > *lenp)
len = *lenp;
if (copy_to_user(buffer, buf, len))
return -EFAULT;
}
*lenp = len;
*ppos += len;
cmm_set_pages(nr);
return 0;
}
static int cmm_timed_pages_handler(struct ctl_table *ctl, int write,
void __user *buffer, size_t *lenp,
loff_t *ppos)
{
long nr = cmm_get_timed_pages();
struct ctl_table ctl_entry = {
.procname = ctl->procname,
.data = &nr,
.maxlen = sizeof(long),
};
int rc;
rc = proc_doulongvec_minmax(&ctl_entry, write, buffer, lenp, ppos);
if (rc < 0 || !write)
return rc;
cmm_add_timed_pages(nr);
return 0;
}
@ -338,7 +330,7 @@ static struct ctl_table cmm_table[] = {
{
.procname = "cmm_timed_pages",
.mode = 0644,
.proc_handler = cmm_pages_handler,
.proc_handler = cmm_timed_pages_handler,
},
{
.procname = "cmm_timeout",

4
arch/s390/mm/extmem.c
View File

@ -80,7 +80,7 @@ struct qin64 {
struct dcss_segment {
struct list_head list;
char dcss_name[8];
char res_name[15];
char res_name[16];
unsigned long start_addr;
unsigned long end;
atomic_t ref_count;
@ -433,7 +433,7 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
memcpy(&seg->res_name, seg->dcss_name, 8);
EBCASC(seg->res_name, 8);
seg->res_name[8] = '\0';
strncat(seg->res_name, " (DCSS)", 7);
strlcat(seg->res_name, " (DCSS)", sizeof(seg->res_name));
seg->res->name = seg->res_name;
rc = seg->vm_segtype;
if (rc == SEG_TYPE_SC ||

2
arch/s390/mm/fault.c
View File

@ -502,6 +502,8 @@ static inline int do_exception(struct pt_regs *regs, int access)
/* No reason to continue if interrupted by SIGKILL. */
if ((fault & VM_FAULT_RETRY) && fatal_signal_pending(current)) {
fault = VM_FAULT_SIGNAL;
if (flags & FAULT_FLAG_RETRY_NOWAIT)
goto out_up;
goto out;
}
if (unlikely(fault & VM_FAULT_ERROR))

454
arch/s390/mm/gmap.c
View File

@ -2,8 +2,10 @@
/*
* KVM guest address space mapping code
*
* Copyright IBM Corp. 2007, 2016
* Copyright IBM Corp. 2007, 2016, 2018
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
* David Hildenbrand <david@redhat.com>
* Janosch Frank <frankja@linux.vnet.ibm.com>
*/
#include <linux/kernel.h>
@ -521,6 +523,9 @@ void gmap_unlink(struct mm_struct *mm, unsigned long *table,
rcu_read_unlock();
}
static void gmap_pmdp_xchg(struct gmap *gmap, pmd_t *old, pmd_t new,
unsigned long gaddr);
/**
* gmap_link - set up shadow page tables to connect a host to a guest address
* @gmap: pointer to guest mapping meta data structure
@ -541,6 +546,7 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
u64 unprot;
int rc;
BUG_ON(gmap_is_shadow(gmap));
@ -584,8 +590,8 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
return -EFAULT;
pmd = pmd_offset(pud, vmaddr);
VM_BUG_ON(pmd_none(*pmd));
/* large pmds cannot yet be handled */
if (pmd_large(*pmd))
/* Are we allowed to use huge pages? */
if (pmd_large(*pmd) && !gmap->mm->context.allow_gmap_hpage_1m)
return -EFAULT;
/* Link gmap segment table entry location to page table. */
rc = radix_tree_preload(GFP_KERNEL);
@ -596,10 +602,22 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
if (*table == _SEGMENT_ENTRY_EMPTY) {
rc = radix_tree_insert(&gmap->host_to_guest,
vmaddr >> PMD_SHIFT, table);
if (!rc)
*table = pmd_val(*pmd);
} else
rc = 0;
if (!rc) {
if (pmd_large(*pmd)) {
*table = (pmd_val(*pmd) &
_SEGMENT_ENTRY_HARDWARE_BITS_LARGE)
| _SEGMENT_ENTRY_GMAP_UC;
} else
*table = pmd_val(*pmd) &
_SEGMENT_ENTRY_HARDWARE_BITS;
}
} else if (*table & _SEGMENT_ENTRY_PROTECT &&
!(pmd_val(*pmd) & _SEGMENT_ENTRY_PROTECT)) {
unprot = (u64)*table;
unprot &= ~_SEGMENT_ENTRY_PROTECT;
unprot |= _SEGMENT_ENTRY_GMAP_UC;
gmap_pmdp_xchg(gmap, (pmd_t *)table, __pmd(unprot), gaddr);
}
spin_unlock(&gmap->guest_table_lock);
spin_unlock(ptl);
radix_tree_preload_end();
@ -690,6 +708,12 @@ void gmap_discard(struct gmap *gmap, unsigned long from, unsigned long to)
vmaddr |= gaddr & ~PMD_MASK;
/* Find vma in the parent mm */
vma = find_vma(gmap->mm, vmaddr);
/*
* We do not discard pages that are backed by
* hugetlbfs, so we don't have to refault them.
*/
if (vma && is_vm_hugetlb_page(vma))
continue;
size = min(to - gaddr, PMD_SIZE - (gaddr & ~PMD_MASK));
zap_page_range(vma, vmaddr, size);
}
@ -864,7 +888,128 @@ static int gmap_pte_op_fixup(struct gmap *gmap, unsigned long gaddr,
*/
static void gmap_pte_op_end(spinlock_t *ptl)
{
spin_unlock(ptl);
if (ptl)
spin_unlock(ptl);
}
/**
* gmap_pmd_op_walk - walk the gmap tables, get the guest table lock
* and return the pmd pointer
* @gmap: pointer to guest mapping meta data structure
* @gaddr: virtual address in the guest address space
*
* Returns a pointer to the pmd for a guest address, or NULL
*/
static inline pmd_t *gmap_pmd_op_walk(struct gmap *gmap, unsigned long gaddr)
{
pmd_t *pmdp;
BUG_ON(gmap_is_shadow(gmap));
spin_lock(&gmap->guest_table_lock);
pmdp = (pmd_t *) gmap_table_walk(gmap, gaddr, 1);
if (!pmdp || pmd_none(*pmdp)) {
spin_unlock(&gmap->guest_table_lock);
return NULL;
}
/* 4k page table entries are locked via the pte (pte_alloc_map_lock). */
if (!pmd_large(*pmdp))
spin_unlock(&gmap->guest_table_lock);
return pmdp;
}
/**
* gmap_pmd_op_end - release the guest_table_lock if needed
* @gmap: pointer to the guest mapping meta data structure
* @pmdp: pointer to the pmd
*/
static inline void gmap_pmd_op_end(struct gmap *gmap, pmd_t *pmdp)
{
if (pmd_large(*pmdp))
spin_unlock(&gmap->guest_table_lock);
}
/*
* gmap_protect_pmd - remove access rights to memory and set pmd notification bits
* @pmdp: pointer to the pmd to be protected
* @prot: indicates access rights: PROT_NONE, PROT_READ or PROT_WRITE
* @bits: notification bits to set
*
* Returns:
* 0 if successfully protected
* -EAGAIN if a fixup is needed
* -EINVAL if unsupported notifier bits have been specified
*
* Expected to be called with sg->mm->mmap_sem in read and
* guest_table_lock held.
*/
static int gmap_protect_pmd(struct gmap *gmap, unsigned long gaddr,
pmd_t *pmdp, int prot, unsigned long bits)
{
int pmd_i = pmd_val(*pmdp) & _SEGMENT_ENTRY_INVALID;
int pmd_p = pmd_val(*pmdp) & _SEGMENT_ENTRY_PROTECT;
pmd_t new = *pmdp;
/* Fixup needed */
if ((pmd_i && (prot != PROT_NONE)) || (pmd_p && (prot == PROT_WRITE)))
return -EAGAIN;
if (prot == PROT_NONE && !pmd_i) {
pmd_val(new) |= _SEGMENT_ENTRY_INVALID;
gmap_pmdp_xchg(gmap, pmdp, new, gaddr);
}
if (prot == PROT_READ && !pmd_p) {
pmd_val(new) &= ~_SEGMENT_ENTRY_INVALID;
pmd_val(new) |= _SEGMENT_ENTRY_PROTECT;
gmap_pmdp_xchg(gmap, pmdp, new, gaddr);
}
if (bits & GMAP_NOTIFY_MPROT)
pmd_val(*pmdp) |= _SEGMENT_ENTRY_GMAP_IN;
/* Shadow GMAP protection needs split PMDs */
if (bits & GMAP_NOTIFY_SHADOW)
return -EINVAL;
return 0;
}
/*
* gmap_protect_pte - remove access rights to memory and set pgste bits
* @gmap: pointer to guest mapping meta data structure
* @gaddr: virtual address in the guest address space
* @pmdp: pointer to the pmd associated with the pte
* @prot: indicates access rights: PROT_NONE, PROT_READ or PROT_WRITE
* @bits: notification bits to set
*
* Returns 0 if successfully protected, -ENOMEM if out of memory and
* -EAGAIN if a fixup is needed.
*
* Expected to be called with sg->mm->mmap_sem in read
*/
static int gmap_protect_pte(struct gmap *gmap, unsigned long gaddr,
pmd_t *pmdp, int prot, unsigned long bits)
{
int rc;
pte_t *ptep;
spinlock_t *ptl = NULL;
unsigned long pbits = 0;
if (pmd_val(*pmdp) & _SEGMENT_ENTRY_INVALID)
return -EAGAIN;
ptep = pte_alloc_map_lock(gmap->mm, pmdp, gaddr, &ptl);
if (!ptep)
return -ENOMEM;
pbits |= (bits & GMAP_NOTIFY_MPROT) ? PGSTE_IN_BIT : 0;
pbits |= (bits & GMAP_NOTIFY_SHADOW) ? PGSTE_VSIE_BIT : 0;
/* Protect and unlock. */
rc = ptep_force_prot(gmap->mm, gaddr, ptep, prot, pbits);
gmap_pte_op_end(ptl);
return rc;
}
/*
@ -883,30 +1028,45 @@ static void gmap_pte_op_end(spinlock_t *ptl)
static int gmap_protect_range(struct gmap *gmap, unsigned long gaddr,
unsigned long len, int prot, unsigned long bits)
{
unsigned long vmaddr;
spinlock_t *ptl;
pte_t *ptep;
unsigned long vmaddr, dist;
pmd_t *pmdp;
int rc;
BUG_ON(gmap_is_shadow(gmap));
while (len) {
rc = -EAGAIN;
ptep = gmap_pte_op_walk(gmap, gaddr, &ptl);
if (ptep) {
rc = ptep_force_prot(gmap->mm, gaddr, ptep, prot, bits);
gmap_pte_op_end(ptl);
pmdp = gmap_pmd_op_walk(gmap, gaddr);
if (pmdp) {
if (!pmd_large(*pmdp)) {
rc = gmap_protect_pte(gmap, gaddr, pmdp, prot,
bits);
if (!rc) {
len -= PAGE_SIZE;
gaddr += PAGE_SIZE;
}
} else {
rc = gmap_protect_pmd(gmap, gaddr, pmdp, prot,
bits);
if (!rc) {
dist = HPAGE_SIZE - (gaddr & ~HPAGE_MASK);
len = len < dist ? 0 : len - dist;
gaddr = (gaddr & HPAGE_MASK) + HPAGE_SIZE;
}
}
gmap_pmd_op_end(gmap, pmdp);
}
if (rc) {
if (rc == -EINVAL)
return rc;
/* -EAGAIN, fixup of userspace mm and gmap */
vmaddr = __gmap_translate(gmap, gaddr);
if (IS_ERR_VALUE(vmaddr))
return vmaddr;
rc = gmap_pte_op_fixup(gmap, gaddr, vmaddr, prot);
if (rc)
return rc;
continue;
}
gaddr += PAGE_SIZE;
len -= PAGE_SIZE;
}
return 0;
}
@ -935,7 +1095,7 @@ int gmap_mprotect_notify(struct gmap *gmap, unsigned long gaddr,
if (!MACHINE_HAS_ESOP && prot == PROT_READ)
return -EINVAL;
down_read(&gmap->mm->mmap_sem);
rc = gmap_protect_range(gmap, gaddr, len, prot, PGSTE_IN_BIT);
rc = gmap_protect_range(gmap, gaddr, len, prot, GMAP_NOTIFY_MPROT);
up_read(&gmap->mm->mmap_sem);
return rc;
}
@ -1474,6 +1634,7 @@ struct gmap *gmap_shadow(struct gmap *parent, unsigned long asce,
unsigned long limit;
int rc;
BUG_ON(parent->mm->context.allow_gmap_hpage_1m);
BUG_ON(gmap_is_shadow(parent));
spin_lock(&parent->shadow_lock);
sg = gmap_find_shadow(parent, asce, edat_level);
@ -1526,7 +1687,7 @@ struct gmap *gmap_shadow(struct gmap *parent, unsigned long asce,
down_read(&parent->mm->mmap_sem);
rc = gmap_protect_range(parent, asce & _ASCE_ORIGIN,
((asce & _ASCE_TABLE_LENGTH) + 1) * PAGE_SIZE,
PROT_READ, PGSTE_VSIE_BIT);
PROT_READ, GMAP_NOTIFY_SHADOW);
up_read(&parent->mm->mmap_sem);
spin_lock(&parent->shadow_lock);
new->initialized = true;
@ -2092,6 +2253,225 @@ void ptep_notify(struct mm_struct *mm, unsigned long vmaddr,
}
EXPORT_SYMBOL_GPL(ptep_notify);
static void pmdp_notify_gmap(struct gmap *gmap, pmd_t *pmdp,
unsigned long gaddr)
{
pmd_val(*pmdp) &= ~_SEGMENT_ENTRY_GMAP_IN;
gmap_call_notifier(gmap, gaddr, gaddr + HPAGE_SIZE - 1);
}
/**
* gmap_pmdp_xchg - exchange a gmap pmd with another
* @gmap: pointer to the guest address space structure
* @pmdp: pointer to the pmd entry
* @new: replacement entry
* @gaddr: the affected guest address
*
* This function is assumed to be called with the guest_table_lock
* held.
*/
static void gmap_pmdp_xchg(struct gmap *gmap, pmd_t *pmdp, pmd_t new,
unsigned long gaddr)
{
gaddr &= HPAGE_MASK;
pmdp_notify_gmap(gmap, pmdp, gaddr);
pmd_val(new) &= ~_SEGMENT_ENTRY_GMAP_IN;
if (MACHINE_HAS_TLB_GUEST)
__pmdp_idte(gaddr, (pmd_t *)pmdp, IDTE_GUEST_ASCE, gmap->asce,
IDTE_GLOBAL);
else if (MACHINE_HAS_IDTE)
__pmdp_idte(gaddr, (pmd_t *)pmdp, 0, 0, IDTE_GLOBAL);
else
__pmdp_csp(pmdp);
*pmdp = new;
}
static void gmap_pmdp_clear(struct mm_struct *mm, unsigned long vmaddr,
int purge)
{
pmd_t *pmdp;
struct gmap *gmap;
unsigned long gaddr;
rcu_read_lock();
list_for_each_entry_rcu(gmap, &mm->context.gmap_list, list) {
spin_lock(&gmap->guest_table_lock);
pmdp = (pmd_t *)radix_tree_delete(&gmap->host_to_guest,
vmaddr >> PMD_SHIFT);
if (pmdp) {
gaddr = __gmap_segment_gaddr((unsigned long *)pmdp);
pmdp_notify_gmap(gmap, pmdp, gaddr);
WARN_ON(pmd_val(*pmdp) & ~(_SEGMENT_ENTRY_HARDWARE_BITS_LARGE |
_SEGMENT_ENTRY_GMAP_UC));
if (purge)
__pmdp_csp(pmdp);
pmd_val(*pmdp) = _SEGMENT_ENTRY_EMPTY;
}
spin_unlock(&gmap->guest_table_lock);
}
rcu_read_unlock();
}
/**
* gmap_pmdp_invalidate - invalidate all affected guest pmd entries without
* flushing
* @mm: pointer to the process mm_struct
* @vmaddr: virtual address in the process address space
*/
void gmap_pmdp_invalidate(struct mm_struct *mm, unsigned long vmaddr)
{
gmap_pmdp_clear(mm, vmaddr, 0);
}
EXPORT_SYMBOL_GPL(gmap_pmdp_invalidate);
/**
* gmap_pmdp_csp - csp all affected guest pmd entries
* @mm: pointer to the process mm_struct
* @vmaddr: virtual address in the process address space
*/
void gmap_pmdp_csp(struct mm_struct *mm, unsigned long vmaddr)
{
gmap_pmdp_clear(mm, vmaddr, 1);
}
EXPORT_SYMBOL_GPL(gmap_pmdp_csp);
/**
* gmap_pmdp_idte_local - invalidate and clear a guest pmd entry
* @mm: pointer to the process mm_struct
* @vmaddr: virtual address in the process address space
*/
void gmap_pmdp_idte_local(struct mm_struct *mm, unsigned long vmaddr)
{
unsigned long *entry, gaddr;
struct gmap *gmap;
pmd_t *pmdp;
rcu_read_lock();
list_for_each_entry_rcu(gmap, &mm->context.gmap_list, list) {
spin_lock(&gmap->guest_table_lock);
entry = radix_tree_delete(&gmap->host_to_guest,
vmaddr >> PMD_SHIFT);
if (entry) {
pmdp = (pmd_t *)entry;
gaddr = __gmap_segment_gaddr(entry);
pmdp_notify_gmap(gmap, pmdp, gaddr);
WARN_ON(*entry & ~(_SEGMENT_ENTRY_HARDWARE_BITS_LARGE |
_SEGMENT_ENTRY_GMAP_UC));
if (MACHINE_HAS_TLB_GUEST)
__pmdp_idte(gaddr, pmdp, IDTE_GUEST_ASCE,
gmap->asce, IDTE_LOCAL);
else if (MACHINE_HAS_IDTE)
__pmdp_idte(gaddr, pmdp, 0, 0, IDTE_LOCAL);
*entry = _SEGMENT_ENTRY_EMPTY;
}
spin_unlock(&gmap->guest_table_lock);
}
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(gmap_pmdp_idte_local);
/**
* gmap_pmdp_idte_global - invalidate and clear a guest pmd entry
* @mm: pointer to the process mm_struct
* @vmaddr: virtual address in the process address space
*/
void gmap_pmdp_idte_global(struct mm_struct *mm, unsigned long vmaddr)
{
unsigned long *entry, gaddr;
struct gmap *gmap;
pmd_t *pmdp;
rcu_read_lock();
list_for_each_entry_rcu(gmap, &mm->context.gmap_list, list) {
spin_lock(&gmap->guest_table_lock);
entry = radix_tree_delete(&gmap->host_to_guest,
vmaddr >> PMD_SHIFT);
if (entry) {
pmdp = (pmd_t *)entry;
gaddr = __gmap_segment_gaddr(entry);
pmdp_notify_gmap(gmap, pmdp, gaddr);
WARN_ON(*entry & ~(_SEGMENT_ENTRY_HARDWARE_BITS_LARGE |
_SEGMENT_ENTRY_GMAP_UC));
if (MACHINE_HAS_TLB_GUEST)
__pmdp_idte(gaddr, pmdp, IDTE_GUEST_ASCE,
gmap->asce, IDTE_GLOBAL);
else if (MACHINE_HAS_IDTE)
__pmdp_idte(gaddr, pmdp, 0, 0, IDTE_GLOBAL);
else
__pmdp_csp(pmdp);
*entry = _SEGMENT_ENTRY_EMPTY;
}
spin_unlock(&gmap->guest_table_lock);
}
rcu_read_unlock();
}
EXPORT_SYMBOL_GPL(gmap_pmdp_idte_global);
/**
* gmap_test_and_clear_dirty_pmd - test and reset segment dirty status
* @gmap: pointer to guest address space
* @pmdp: pointer to the pmd to be tested
* @gaddr: virtual address in the guest address space
*
* This function is assumed to be called with the guest_table_lock
* held.
*/
bool gmap_test_and_clear_dirty_pmd(struct gmap *gmap, pmd_t *pmdp,
unsigned long gaddr)
{
if (pmd_val(*pmdp) & _SEGMENT_ENTRY_INVALID)
return false;
/* Already protected memory, which did not change is clean */
if (pmd_val(*pmdp) & _SEGMENT_ENTRY_PROTECT &&
!(pmd_val(*pmdp) & _SEGMENT_ENTRY_GMAP_UC))
return false;
/* Clear UC indication and reset protection */
pmd_val(*pmdp) &= ~_SEGMENT_ENTRY_GMAP_UC;
gmap_protect_pmd(gmap, gaddr, pmdp, PROT_READ, 0);
return true;
}
/**
* gmap_sync_dirty_log_pmd - set bitmap based on dirty status of segment
* @gmap: pointer to guest address space
* @bitmap: dirty bitmap for this pmd
* @gaddr: virtual address in the guest address space
* @vmaddr: virtual address in the host address space
*
* This function is assumed to be called with the guest_table_lock
* held.
*/
void gmap_sync_dirty_log_pmd(struct gmap *gmap, unsigned long bitmap[4],
unsigned long gaddr, unsigned long vmaddr)
{
int i;
pmd_t *pmdp;
pte_t *ptep;
spinlock_t *ptl;
pmdp = gmap_pmd_op_walk(gmap, gaddr);
if (!pmdp)
return;
if (pmd_large(*pmdp)) {
if (gmap_test_and_clear_dirty_pmd(gmap, pmdp, gaddr))
bitmap_fill(bitmap, _PAGE_ENTRIES);
} else {
for (i = 0; i < _PAGE_ENTRIES; i++, vmaddr += PAGE_SIZE) {
ptep = pte_alloc_map_lock(gmap->mm, pmdp, vmaddr, &ptl);
if (!ptep)
continue;
if (ptep_test_and_clear_uc(gmap->mm, vmaddr, ptep))
set_bit(i, bitmap);
spin_unlock(ptl);
}
}
gmap_pmd_op_end(gmap, pmdp);
}
EXPORT_SYMBOL_GPL(gmap_sync_dirty_log_pmd);
static inline void thp_split_mm(struct mm_struct *mm)
{
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
@ -2168,17 +2548,45 @@ EXPORT_SYMBOL_GPL(s390_enable_sie);
* Enable storage key handling from now on and initialize the storage
* keys with the default key.
*/
static int __s390_enable_skey(pte_t *pte, unsigned long addr,
unsigned long next, struct mm_walk *walk)
static int __s390_enable_skey_pte(pte_t *pte, unsigned long addr,
unsigned long next, struct mm_walk *walk)
{
/* Clear storage key */
ptep_zap_key(walk->mm, addr, pte);
return 0;
}
static int __s390_enable_skey_hugetlb(pte_t *pte, unsigned long addr,
unsigned long hmask, unsigned long next,
struct mm_walk *walk)
{
pmd_t *pmd = (pmd_t *)pte;
unsigned long start, end;
struct page *page = pmd_page(*pmd);
/*
* The write check makes sure we do not set a key on shared
* memory. This is needed as the walker does not differentiate
* between actual guest memory and the process executable or
* shared libraries.
*/
if (pmd_val(*pmd) & _SEGMENT_ENTRY_INVALID ||
!(pmd_val(*pmd) & _SEGMENT_ENTRY_WRITE))
return 0;
start = pmd_val(*pmd) & HPAGE_MASK;
end = start + HPAGE_SIZE - 1;
__storage_key_init_range(start, end);
set_bit(PG_arch_1, &page->flags);
return 0;
}
int s390_enable_skey(void)
{
struct mm_walk walk = { .pte_entry = __s390_enable_skey };
struct mm_walk walk = {
.hugetlb_entry = __s390_enable_skey_hugetlb,
.pte_entry = __s390_enable_skey_pte,
};
struct mm_struct *mm = current->mm;
struct vm_area_struct *vma;
int rc = 0;

24
arch/s390/mm/hugetlbpage.c
View File

@ -123,6 +123,29 @@ static inline pte_t __rste_to_pte(unsigned long rste)
return pte;
}
static void clear_huge_pte_skeys(struct mm_struct *mm, unsigned long rste)
{
struct page *page;
unsigned long size, paddr;
if (!mm_uses_skeys(mm) ||
rste & _SEGMENT_ENTRY_INVALID)
return;
if ((rste & _REGION_ENTRY_TYPE_MASK) == _REGION_ENTRY_TYPE_R3) {
page = pud_page(__pud(rste));
size = PUD_SIZE;
paddr = rste & PUD_MASK;
} else {
page = pmd_page(__pmd(rste));
size = PMD_SIZE;
paddr = rste & PMD_MASK;
}
if (!test_and_set_bit(PG_arch_1, &page->flags))
__storage_key_init_range(paddr, paddr + size - 1);
}
void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, pte_t pte)
{
@ -137,6 +160,7 @@ void set_huge_pte_at(struct mm_struct *mm, unsigned long addr,
rste |= _REGION_ENTRY_TYPE_R3 | _REGION3_ENTRY_LARGE;
else
rste |= _SEGMENT_ENTRY_LARGE;
clear_huge_pte_skeys(mm, rste);
pte_val(*ptep) = rste;
}

2
arch/s390/mm/page-states.c
View File

@ -271,7 +271,7 @@ void arch_set_page_states(int make_stable)
list_for_each(l, &zone->free_area[order].free_list[t]) {
page = list_entry(l, struct page, lru);
if (make_stable)
set_page_stable_dat(page, 0);
set_page_stable_dat(page, order);
else
set_page_unused(page, order);
}

6
arch/s390/mm/pageattr.c
View File

@ -14,7 +14,7 @@
static inline unsigned long sske_frame(unsigned long addr, unsigned char skey)
{
asm volatile(".insn rrf,0xb22b0000,%[skey],%[addr],9,0"
asm volatile(".insn rrf,0xb22b0000,%[skey],%[addr],1,0"
: [addr] "+a" (addr) : [skey] "d" (skey));
return addr;
}
@ -23,8 +23,6 @@ void __storage_key_init_range(unsigned long start, unsigned long end)
{
unsigned long boundary, size;
if (!PAGE_DEFAULT_KEY)
return;
while (start < end) {
if (MACHINE_HAS_EDAT1) {
/* set storage keys for a 1MB frame */
@ -37,7 +35,7 @@ void __storage_key_init_range(unsigned long start, unsigned long end)
continue;
}
}
page_set_storage_key(start, PAGE_DEFAULT_KEY, 0);
page_set_storage_key(start, PAGE_DEFAULT_KEY, 1);
start += PAGE_SIZE;
}
}

2
arch/s390/mm/pgalloc.c
View File

@ -28,7 +28,7 @@ static struct ctl_table page_table_sysctl[] = {
.data = &page_table_allocate_pgste,
.maxlen = sizeof(int),
.mode = S_IRUGO | S_IWUSR,
.proc_handler = proc_dointvec,
.proc_handler = proc_dointvec_minmax,
.extra1 = &page_table_allocate_pgste_min,
.extra2 = &page_table_allocate_pgste_max,
},

159
arch/s390/mm/pgtable.c
View File

@ -347,18 +347,27 @@ static inline void pmdp_idte_local(struct mm_struct *mm,
mm->context.asce, IDTE_LOCAL);
else
__pmdp_idte(addr, pmdp, 0, 0, IDTE_LOCAL);
if (mm_has_pgste(mm) && mm->context.allow_gmap_hpage_1m)
gmap_pmdp_idte_local(mm, addr);
}
static inline void pmdp_idte_global(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp)
{
if (MACHINE_HAS_TLB_GUEST)
if (MACHINE_HAS_TLB_GUEST) {
__pmdp_idte(addr, pmdp, IDTE_NODAT | IDTE_GUEST_ASCE,
mm->context.asce, IDTE_GLOBAL);
else if (MACHINE_HAS_IDTE)
if (mm_has_pgste(mm) && mm->context.allow_gmap_hpage_1m)
gmap_pmdp_idte_global(mm, addr);
} else if (MACHINE_HAS_IDTE) {
__pmdp_idte(addr, pmdp, 0, 0, IDTE_GLOBAL);
else
if (mm_has_pgste(mm) && mm->context.allow_gmap_hpage_1m)
gmap_pmdp_idte_global(mm, addr);
} else {
__pmdp_csp(pmdp);
if (mm_has_pgste(mm) && mm->context.allow_gmap_hpage_1m)
gmap_pmdp_csp(mm, addr);
}
}
static inline pmd_t pmdp_flush_direct(struct mm_struct *mm,
@ -392,6 +401,8 @@ static inline pmd_t pmdp_flush_lazy(struct mm_struct *mm,
cpumask_of(smp_processor_id()))) {
pmd_val(*pmdp) |= _SEGMENT_ENTRY_INVALID;
mm->context.flush_mm = 1;
if (mm_has_pgste(mm))
gmap_pmdp_invalidate(mm, addr);
} else {
pmdp_idte_global(mm, addr, pmdp);
}
@ -399,6 +410,24 @@ static inline pmd_t pmdp_flush_lazy(struct mm_struct *mm,
return old;
}
static pmd_t *pmd_alloc_map(struct mm_struct *mm, unsigned long addr)
{
pgd_t *pgd;
p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
pgd = pgd_offset(mm, addr);
p4d = p4d_alloc(mm, pgd, addr);
if (!p4d)
return NULL;
pud = pud_alloc(mm, p4d, addr);
if (!pud)
return NULL;
pmd = pmd_alloc(mm, pud, addr);
return pmd;
}
pmd_t pmdp_xchg_direct(struct mm_struct *mm, unsigned long addr,
pmd_t *pmdp, pmd_t new)
{
@ -693,40 +722,14 @@ void ptep_zap_key(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
/*
* Test and reset if a guest page is dirty
*/
bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long addr)
bool ptep_test_and_clear_uc(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
{
spinlock_t *ptl;
pgd_t *pgd;
p4d_t *p4d;
pud_t *pud;
pmd_t *pmd;
pgste_t pgste;
pte_t *ptep;
pte_t pte;
bool dirty;
int nodat;
pgd = pgd_offset(mm, addr);
p4d = p4d_alloc(mm, pgd, addr);
if (!p4d)
return false;
pud = pud_alloc(mm, p4d, addr);
if (!pud)
return false;
pmd = pmd_alloc(mm, pud, addr);
if (!pmd)
return false;
/* We can't run guests backed by huge pages, but userspace can
* still set them up and then try to migrate them without any
* migration support.
*/
if (pmd_large(*pmd))
return true;
ptep = pte_alloc_map_lock(mm, pmd, addr, &ptl);
if (unlikely(!ptep))
return false;
pgste = pgste_get_lock(ptep);
dirty = !!(pgste_val(pgste) & PGSTE_UC_BIT);
pgste_val(pgste) &= ~PGSTE_UC_BIT;
@ -742,21 +745,43 @@ bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long addr)
*ptep = pte;
}
pgste_set_unlock(ptep, pgste);
spin_unlock(ptl);
return dirty;
}
EXPORT_SYMBOL_GPL(test_and_clear_guest_dirty);
EXPORT_SYMBOL_GPL(ptep_test_and_clear_uc);
int set_guest_storage_key(struct mm_struct *mm, unsigned long addr,
unsigned char key, bool nq)
{
unsigned long keyul;
unsigned long keyul, paddr;
spinlock_t *ptl;
pgste_t old, new;
pmd_t *pmdp;
pte_t *ptep;
ptep = get_locked_pte(mm, addr, &ptl);
pmdp = pmd_alloc_map(mm, addr);
if (unlikely(!pmdp))
return -EFAULT;
ptl = pmd_lock(mm, pmdp);
if (!pmd_present(*pmdp)) {
spin_unlock(ptl);
return -EFAULT;
}
if (pmd_large(*pmdp)) {
paddr = pmd_val(*pmdp) & HPAGE_MASK;
paddr |= addr & ~HPAGE_MASK;
/*
* Huge pmds need quiescing operations, they are
* always mapped.
*/
page_set_storage_key(paddr, key, 1);
spin_unlock(ptl);
return 0;
}
spin_unlock(ptl);
ptep = pte_alloc_map_lock(mm, pmdp, addr, &ptl);
if (unlikely(!ptep))
return -EFAULT;
@ -767,14 +792,14 @@ int set_guest_storage_key(struct mm_struct *mm, unsigned long addr,
pgste_val(new) |= (keyul & (_PAGE_CHANGED | _PAGE_REFERENCED)) << 48;
pgste_val(new) |= (keyul & (_PAGE_ACC_BITS | _PAGE_FP_BIT)) << 56;
if (!(pte_val(*ptep) & _PAGE_INVALID)) {
unsigned long address, bits, skey;
unsigned long bits, skey;
address = pte_val(*ptep) & PAGE_MASK;
skey = (unsigned long) page_get_storage_key(address);
paddr = pte_val(*ptep) & PAGE_MASK;
skey = (unsigned long) page_get_storage_key(paddr);
bits = skey & (_PAGE_CHANGED | _PAGE_REFERENCED);
skey = key & (_PAGE_ACC_BITS | _PAGE_FP_BIT);
/* Set storage key ACC and FP */
page_set_storage_key(address, skey, !nq);
page_set_storage_key(paddr, skey, !nq);
/* Merge host changed & referenced into pgste */
pgste_val(new) |= bits << 52;
}
@ -830,11 +855,32 @@ EXPORT_SYMBOL(cond_set_guest_storage_key);
int reset_guest_reference_bit(struct mm_struct *mm, unsigned long addr)
{
spinlock_t *ptl;
unsigned long paddr;
pgste_t old, new;
pmd_t *pmdp;
pte_t *ptep;
int cc = 0;
ptep = get_locked_pte(mm, addr, &ptl);
pmdp = pmd_alloc_map(mm, addr);
if (unlikely(!pmdp))
return -EFAULT;
ptl = pmd_lock(mm, pmdp);
if (!pmd_present(*pmdp)) {
spin_unlock(ptl);
return -EFAULT;
}
if (pmd_large(*pmdp)) {
paddr = pmd_val(*pmdp) & HPAGE_MASK;
paddr |= addr & ~HPAGE_MASK;
cc = page_reset_referenced(paddr);
spin_unlock(ptl);
return cc;
}
spin_unlock(ptl);
ptep = pte_alloc_map_lock(mm, pmdp, addr, &ptl);
if (unlikely(!ptep))
return -EFAULT;
@ -843,7 +889,8 @@ int reset_guest_reference_bit(struct mm_struct *mm, unsigned long addr)
pgste_val(new) &= ~PGSTE_GR_BIT;
if (!(pte_val(*ptep) & _PAGE_INVALID)) {
cc = page_reset_referenced(pte_val(*ptep) & PAGE_MASK);
paddr = pte_val(*ptep) & PAGE_MASK;
cc = page_reset_referenced(paddr);
/* Merge real referenced bit into host-set */
pgste_val(new) |= ((unsigned long) cc << 53) & PGSTE_HR_BIT;
}
@ -862,18 +909,42 @@ EXPORT_SYMBOL(reset_guest_reference_bit);
int get_guest_storage_key(struct mm_struct *mm, unsigned long addr,
unsigned char *key)
{
unsigned long paddr;
spinlock_t *ptl;
pgste_t pgste;
pmd_t *pmdp;
pte_t *ptep;
ptep = get_locked_pte(mm, addr, &ptl);
pmdp = pmd_alloc_map(mm, addr);
if (unlikely(!pmdp))
return -EFAULT;
ptl = pmd_lock(mm, pmdp);
if (!pmd_present(*pmdp)) {
/* Not yet mapped memory has a zero key */
spin_unlock(ptl);
*key = 0;
return 0;
}
if (pmd_large(*pmdp)) {
paddr = pmd_val(*pmdp) & HPAGE_MASK;
paddr |= addr & ~HPAGE_MASK;
*key = page_get_storage_key(paddr);
spin_unlock(ptl);
return 0;
}
spin_unlock(ptl);
ptep = pte_alloc_map_lock(mm, pmdp, addr, &ptl);
if (unlikely(!ptep))
return -EFAULT;
pgste = pgste_get_lock(ptep);
*key = (pgste_val(pgste) & (PGSTE_ACC_BITS | PGSTE_FP_BIT)) >> 56;
paddr = pte_val(*ptep) & PAGE_MASK;
if (!(pte_val(*ptep) & _PAGE_INVALID))
*key = page_get_storage_key(pte_val(*ptep) & PAGE_MASK);
*key = page_get_storage_key(paddr);
/* Reflect guest's logical view, not physical */
*key |= (pgste_val(pgste) & (PGSTE_GR_BIT | PGSTE_GC_BIT)) >> 48;
pgste_set_unlock(ptep, pgste);

2
arch/s390/net/bpf_jit_comp.c
View File

@ -485,8 +485,6 @@ static void bpf_jit_epilogue(struct bpf_jit *jit, u32 stack_depth)
/* br %r1 */
_EMIT2(0x07f1);
} else {
/* larl %r1,.+14 */
EMIT6_PCREL_RILB(0xc0000000, REG_1, jit->prg + 14);
/* ex 0,S390_lowcore.br_r1_tampoline */
EMIT4_DISP(0x44000000, REG_0, REG_0,
offsetof(struct lowcore, br_r1_trampoline));

16
arch/s390/numa/numa.c
View File

@ -134,26 +134,14 @@ void __init numa_setup(void)
{
pr_info("NUMA mode: %s\n", mode->name);
nodes_clear(node_possible_map);
/* Initially attach all possible CPUs to node 0. */
cpumask_copy(&node_to_cpumask_map[0], cpu_possible_mask);
if (mode->setup)
mode->setup();
numa_setup_memory();
memblock_dump_all();
}
/*
* numa_init_early() - Initialization initcall
*
* This runs when only one CPU is online and before the first
* topology update is called for by the scheduler.
*/
static int __init numa_init_early(void)
{
/* Attach all possible CPUs to node 0 for now. */
cpumask_copy(&node_to_cpumask_map[0], cpu_possible_mask);
return 0;
}
early_initcall(numa_init_early);
/*
* numa_init_late() - Initialization initcall
*

8
arch/s390/pci/pci_debug.c
View File

@ -48,6 +48,10 @@ static char *pci_fmt2_names[] = {
"Maximum work units",
};
static char *pci_fmt3_names[] = {
"Transmitted bytes",
};
static char *pci_sw_names[] = {
"Allocated pages",
"Mapped pages",
@ -112,6 +116,10 @@ static int pci_perf_show(struct seq_file *m, void *v)
pci_fmb_show(m, pci_fmt2_names, ARRAY_SIZE(pci_fmt2_names),
&zdev->fmb->fmt2.consumed_work_units);
break;
case 3:
pci_fmb_show(m, pci_fmt3_names, ARRAY_SIZE(pci_fmt3_names),
&zdev->fmb->fmt3.tx_bytes);
break;
default:
seq_puts(m, "Unknown format\n");
}

9
arch/s390/purgatory/Makefile
View File

@ -7,13 +7,13 @@ purgatory-y := head.o purgatory.o string.o sha256.o mem.o
targets += $(purgatory-y) purgatory.ro kexec-purgatory.c
PURGATORY_OBJS = $(addprefix $(obj)/,$(purgatory-y))
$(obj)/sha256.o: $(srctree)/lib/sha256.c
$(obj)/sha256.o: $(srctree)/lib/sha256.c FORCE
$(call if_changed_rule,cc_o_c)
$(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S
$(obj)/mem.o: $(srctree)/arch/s390/lib/mem.S FORCE
$(call if_changed_rule,as_o_S)
$(obj)/string.o: $(srctree)/arch/s390/lib/string.c
$(obj)/string.o: $(srctree)/arch/s390/lib/string.c FORCE
$(call if_changed_rule,cc_o_c)
LDFLAGS_purgatory.ro := -e purgatory_start -r --no-undefined -nostdlib
@ -21,8 +21,9 @@ LDFLAGS_purgatory.ro += -z nodefaultlib
KBUILD_CFLAGS := -fno-strict-aliasing -Wall -Wstrict-prototypes
KBUILD_CFLAGS += -Wno-pointer-sign -Wno-sign-compare
KBUILD_CFLAGS += -fno-zero-initialized-in-bss -fno-builtin -ffreestanding
KBUILD_CFLAGS += -c -MD -Os -m64 -msoft-float
KBUILD_CFLAGS += -c -MD -Os -m64 -msoft-float -fno-common
KBUILD_CFLAGS += $(call cc-option,-fno-PIE)
KBUILD_AFLAGS := $(filter-out -DCC_USING_EXPOLINE,$(KBUILD_AFLAGS))
$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE
$(call if_changed,ld)

45
arch/s390/purgatory/head.S
View File

@ -243,33 +243,26 @@ gprregs:
.quad 0
.endr
purgatory_sha256_digest:
.global purgatory_sha256_digest
.rept 32 /* SHA256_DIGEST_SIZE */
.byte 0
.endr
/* Macro to define a global variable with name and size (in bytes) to be
* shared with C code.
*
* Add the .size and .type attribute to satisfy checks on the Elf_Sym during
* purgatory load.
*/
.macro GLOBAL_VARIABLE name,size
\name:
.global \name
.size \name,\size
.type \name,object
.skip \size,0
.endm
purgatory_sha_regions:
.global purgatory_sha_regions
.rept 16 * __KEXEC_SHA_REGION_SIZE /* KEXEC_SEGMENTS_MAX */
.byte 0
.endr
kernel_entry:
.global kernel_entry
.quad 0
kernel_type:
.global kernel_type
.quad 0
crash_start:
.global crash_start
.quad 0
crash_size:
.global crash_size
.quad 0
GLOBAL_VARIABLE purgatory_sha256_digest,32
GLOBAL_VARIABLE purgatory_sha_regions,16*__KEXEC_SHA_REGION_SIZE
GLOBAL_VARIABLE kernel_entry,8
GLOBAL_VARIABLE kernel_type,8
GLOBAL_VARIABLE crash_start,8
GLOBAL_VARIABLE crash_size,8
.align PAGE_SIZE
stack:

9
arch/s390/purgatory/purgatory.c
View File

@ -12,15 +12,6 @@
#include <linux/string.h>
#include <asm/purgatory.h>
struct kexec_sha_region purgatory_sha_regions[KEXEC_SEGMENT_MAX];
u8 purgatory_sha256_digest[SHA256_DIGEST_SIZE];
u64 kernel_entry;
u64 kernel_type;
u64 crash_start;
u64 crash_size;
int verify_sha256_digest(void)
{
struct kexec_sha_region *ptr, *end;

11
arch/s390/scripts/Makefile.chkbss
View File

@ -2,13 +2,22 @@
quiet_cmd_chkbss = CHKBSS $<
define cmd_chkbss
rm -f $@; \
if ! $(OBJDUMP) -j .bss -w -h $< | awk 'END { if ($$3) exit 1 }'; then \
echo "error: $< .bss section is not empty" >&2; exit 1; \
fi; \
touch $@;
endef
$(obj)/built-in.a: $(patsubst %, $(obj)/%.chkbss, $(chkbss))
chkbss-target ?= $(obj)/built-in.a
ifneq (,$(findstring /,$(chkbss)))
chkbss-files := $(patsubst %, %.chkbss, $(chkbss))
else
chkbss-files := $(patsubst %, $(obj)/%.chkbss, $(chkbss))
endif
$(chkbss-target): $(chkbss-files)
targets += $(notdir $(chkbss-files))
%.o.chkbss: %.o
$(call cmd,chkbss)

4
arch/s390/tools/gen_opcode_table.c
View File

@ -257,7 +257,7 @@ static void add_to_group(struct gen_opcode *desc, struct insn *insn, int offset)
if (!desc->group)
exit(EXIT_FAILURE);
group = &desc->group[desc->nr_groups - 1];
strncpy(group->opcode, insn->opcode, 2);
memcpy(group->opcode, insn->opcode, 2);
group->type = insn->type;
group->offset = offset;
group->count = 1;
@ -283,7 +283,7 @@ static void print_opcode_table(struct gen_opcode *desc)
continue;
add_to_group(desc, insn, offset);
if (strncmp(opcode, insn->opcode, 2)) {
strncpy(opcode, insn->opcode, 2);
memcpy(opcode, insn->opcode, 2);
printf("\t/* %.2s */ \\\n", opcode);
}
print_opcode(insn, offset);

17
drivers/s390/block/dasd.c
View File

@ -73,8 +73,8 @@ static int dasd_alloc_queue(struct dasd_block *);
static void dasd_setup_queue(struct dasd_block *);
static void dasd_free_queue(struct dasd_block *);
static int dasd_flush_block_queue(struct dasd_block *);
static void dasd_device_tasklet(struct dasd_device *);
static void dasd_block_tasklet(struct dasd_block *);
static void dasd_device_tasklet(unsigned long);
static void dasd_block_tasklet(unsigned long);
static void do_kick_device(struct work_struct *);
static void do_restore_device(struct work_struct *);
static void do_reload_device(struct work_struct *);
@ -125,8 +125,7 @@ struct dasd_device *dasd_alloc_device(void)
dasd_init_chunklist(&device->erp_chunks, device->erp_mem, PAGE_SIZE);
spin_lock_init(&device->mem_lock);
atomic_set(&device->tasklet_scheduled, 0);
tasklet_init(&device->tasklet,
(void (*)(unsigned long)) dasd_device_tasklet,
tasklet_init(&device->tasklet, dasd_device_tasklet,
(unsigned long) device);
INIT_LIST_HEAD(&device->ccw_queue);
timer_setup(&device->timer, dasd_device_timeout, 0);
@ -166,8 +165,7 @@ struct dasd_block *dasd_alloc_block(void)
atomic_set(&block->open_count, -1);
atomic_set(&block->tasklet_scheduled, 0);
tasklet_init(&block->tasklet,
(void (*)(unsigned long)) dasd_block_tasklet,
tasklet_init(&block->tasklet, dasd_block_tasklet,
(unsigned long) block);
INIT_LIST_HEAD(&block->ccw_queue);
spin_lock_init(&block->queue_lock);
@ -2064,8 +2062,9 @@ EXPORT_SYMBOL_GPL(dasd_flush_device_queue);
/*
* Acquire the device lock and process queues for the device.
*/
static void dasd_device_tasklet(struct dasd_device *device)
static void dasd_device_tasklet(unsigned long data)
{
struct dasd_device *device = (struct dasd_device *) data;
struct list_head final_queue;
atomic_set (&device->tasklet_scheduled, 0);
@ -2783,8 +2782,9 @@ static void __dasd_block_start_head(struct dasd_block *block)
* block layer request queue, creates ccw requests, enqueues them on
* a dasd_device and processes ccw requests that have been returned.
*/
static void dasd_block_tasklet(struct dasd_block *block)
static void dasd_block_tasklet(unsigned long data)
{
struct dasd_block *block = (struct dasd_block *) data;
struct list_head final_queue;
struct list_head *l, *n;
struct dasd_ccw_req *cqr;
@ -3127,6 +3127,7 @@ static int dasd_alloc_queue(struct dasd_block *block)
block->tag_set.nr_hw_queues = nr_hw_queues;
block->tag_set.queue_depth = queue_depth;
block->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
block->tag_set.numa_node = NUMA_NO_NODE;
rc = blk_mq_alloc_tag_set(&block->tag_set);
if (rc)

2
drivers/s390/block/dasd_alias.c
View File

@ -708,7 +708,7 @@ static int reset_summary_unit_check(struct alias_lcu *lcu,
struct ccw1 *ccw;
cqr = lcu->rsu_cqr;
strncpy((char *) &cqr->magic, "ECKD", 4);
memcpy((char *) &cqr->magic, "ECKD", 4);
ASCEBC((char *) &cqr->magic, 4);
ccw = cqr->cpaddr;
ccw->cmd_code = DASD_ECKD_CCW_RSCK;

2
drivers/s390/block/dasd_devmap.c
View File

@ -426,7 +426,7 @@ dasd_add_busid(const char *bus_id, int features)
if (!devmap) {
/* This bus_id is new. */
new->devindex = dasd_max_devindex++;
strncpy(new->bus_id, bus_id, DASD_BUS_ID_SIZE);
strlcpy(new->bus_id, bus_id, DASD_BUS_ID_SIZE);
new->features = features;
new->device = NULL;
list_add(&new->list, &dasd_hashlists[hash]);

12
drivers/s390/block/dasd_eckd.c
View File

@ -1780,6 +1780,9 @@ static void dasd_eckd_uncheck_device(struct dasd_device *device)
struct dasd_eckd_private *private = device->private;
int i;
if (!private)
return;
dasd_alias_disconnect_device_from_lcu(device);
private->ned = NULL;
private->sneq = NULL;
@ -2035,8 +2038,11 @@ static int dasd_eckd_basic_to_ready(struct dasd_device *device)
static int dasd_eckd_online_to_ready(struct dasd_device *device)
{
cancel_work_sync(&device->reload_device);
cancel_work_sync(&device->kick_validate);
if (cancel_work_sync(&device->reload_device))
dasd_put_device(device);
if (cancel_work_sync(&device->kick_validate))
dasd_put_device(device);
return 0;
};
@ -3535,7 +3541,7 @@ static int prepare_itcw(struct itcw *itcw,
dcw = itcw_add_dcw(itcw, pfx_cmd, 0,
&pfxdata, sizeof(pfxdata), total_data_size);
return PTR_RET(dcw);
return PTR_ERR_OR_ZERO(dcw);
}
static struct dasd_ccw_req *dasd_eckd_build_cp_tpm_track(

4
drivers/s390/block/dasd_eer.c
View File

@ -313,7 +313,7 @@ static void dasd_eer_write_standard_trigger(struct dasd_device *device,
ktime_get_real_ts64(&ts);
header.tv_sec = ts.tv_sec;
header.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
strncpy(header.busid, dev_name(&device->cdev->dev),
strlcpy(header.busid, dev_name(&device->cdev->dev),
DASD_EER_BUSID_SIZE);
spin_lock_irqsave(&bufferlock, flags);
@ -356,7 +356,7 @@ static void dasd_eer_write_snss_trigger(struct dasd_device *device,
ktime_get_real_ts64(&ts);
header.tv_sec = ts.tv_sec;
header.tv_usec = ts.tv_nsec / NSEC_PER_USEC;
strncpy(header.busid, dev_name(&device->cdev->dev),
strlcpy(header.busid, dev_name(&device->cdev->dev),
DASD_EER_BUSID_SIZE);
spin_lock_irqsave(&bufferlock, flags);

1
drivers/s390/block/scm_blk.c
View File

@ -455,6 +455,7 @@ int scm_blk_dev_setup(struct scm_blk_dev *bdev, struct scm_device *scmdev)
bdev->tag_set.nr_hw_queues = nr_requests;
bdev->tag_set.queue_depth = nr_requests_per_io * nr_requests;
bdev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;
bdev->tag_set.numa_node = NUMA_NO_NODE;
ret = blk_mq_alloc_tag_set(&bdev->tag_set);
if (ret)

5
drivers/s390/char/Makefile
View File

@ -12,11 +12,6 @@ GCOV_PROFILE_sclp_early_core.o := n
KCOV_INSTRUMENT_sclp_early_core.o := n
UBSAN_SANITIZE_sclp_early_core.o := n
ifneq ($(CC_FLAGS_MARCH),-march=z900)
CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_MARCH)
CFLAGS_sclp_early_core.o += -march=z900
endif
CFLAGS_sclp_early_core.o += -D__NO_FORTIFY
CFLAGS_REMOVE_sclp_early_core.o += $(CC_FLAGS_EXPOLINE)

28
drivers/s390/char/keyboard.c
View File

@ -334,37 +334,41 @@ do_kdsk_ioctl(struct kbd_data *kbd, struct kbentry __user *user_kbe,
int cmd, int perm)
{
struct kbentry tmp;
unsigned long kb_index, kb_table;
ushort *key_map, val, ov;
if (copy_from_user(&tmp, user_kbe, sizeof(struct kbentry)))
return -EFAULT;
kb_index = (unsigned long) tmp.kb_index;
#if NR_KEYS < 256
if (tmp.kb_index >= NR_KEYS)
if (kb_index >= NR_KEYS)
return -EINVAL;
#endif
kb_table = (unsigned long) tmp.kb_table;
#if MAX_NR_KEYMAPS < 256
if (tmp.kb_table >= MAX_NR_KEYMAPS)
if (kb_table >= MAX_NR_KEYMAPS)
return -EINVAL;
kb_table = array_index_nospec(kb_table , MAX_NR_KEYMAPS);
#endif
switch (cmd) {
case KDGKBENT:
key_map = kbd->key_maps[tmp.kb_table];
key_map = kbd->key_maps[kb_table];
if (key_map) {
val = U(key_map[tmp.kb_index]);
val = U(key_map[kb_index]);
if (KTYP(val) >= KBD_NR_TYPES)
val = K_HOLE;
} else
val = (tmp.kb_index ? K_HOLE : K_NOSUCHMAP);
val = (kb_index ? K_HOLE : K_NOSUCHMAP);
return put_user(val, &user_kbe->kb_value);
case KDSKBENT:
if (!perm)
return -EPERM;
if (!tmp.kb_index && tmp.kb_value == K_NOSUCHMAP) {
if (!kb_index && tmp.kb_value == K_NOSUCHMAP) {
/* disallocate map */
key_map = kbd->key_maps[tmp.kb_table];
key_map = kbd->key_maps[kb_table];
if (key_map) {
kbd->key_maps[tmp.kb_table] = NULL;
kbd->key_maps[kb_table] = NULL;
kfree(key_map);
}
break;
@ -375,18 +379,18 @@ do_kdsk_ioctl(struct kbd_data *kbd, struct kbentry __user *user_kbe,
if (KVAL(tmp.kb_value) > kbd_max_vals[KTYP(tmp.kb_value)])
return -EINVAL;
if (!(key_map = kbd->key_maps[tmp.kb_table])) {
if (!(key_map = kbd->key_maps[kb_table])) {
int j;
key_map = kmalloc(sizeof(plain_map),
GFP_KERNEL);
if (!key_map)
return -ENOMEM;
kbd->key_maps[tmp.kb_table] = key_map;
kbd->key_maps[kb_table] = key_map;
for (j = 0; j < NR_KEYS; j++)
key_map[j] = U(K_HOLE);
}
ov = U(key_map[tmp.kb_index]);
ov = U(key_map[kb_index]);
if (tmp.kb_value == ov)
break; /* nothing to do */
/*
@ -395,7 +399,7 @@ do_kdsk_ioctl(struct kbd_data *kbd, struct kbentry __user *user_kbe,
if (((ov == K_SAK) || (tmp.kb_value == K_SAK)) &&
!capable(CAP_SYS_ADMIN))
return -EPERM;
key_map[tmp.kb_index] = U(tmp.kb_value);
key_map[kb_index] = U(tmp.kb_value);
break;
}
return 0;

2
drivers/s390/char/monwriter.c
View File

@ -61,7 +61,7 @@ static int monwrite_diag(struct monwrite_hdr *myhdr, char *buffer, int fcn)
struct appldata_product_id id;
int rc;
strncpy(id.prod_nr, "LNXAPPL", 7);
memcpy(id.prod_nr, "LNXAPPL", 7);
id.prod_fn = myhdr->applid;
id.record_nr = myhdr->record_num;
id.version_nr = myhdr->version;

38
drivers/s390/char/sclp_async.c
View File

@ -64,42 +64,18 @@ static struct notifier_block call_home_panic_nb = {
.priority = INT_MAX,
};
static int proc_handler_callhome(struct ctl_table *ctl, int write,
void __user *buffer, size_t *count,
loff_t *ppos)
{
unsigned long val;
int len, rc;
char buf[3];
if (!*count || (*ppos && !write)) {
*count = 0;
return 0;
}
if (!write) {
len = snprintf(buf, sizeof(buf), "%d\n", callhome_enabled);
rc = copy_to_user(buffer, buf, sizeof(buf));
if (rc != 0)
return -EFAULT;
} else {
len = *count;
rc = kstrtoul_from_user(buffer, len, 0, &val);
if (rc)
return rc;
if (val != 0 && val != 1)
return -EINVAL;
callhome_enabled = val;
}
*count = len;
*ppos += len;
return 0;
}
static int zero;
static int one = 1;
static struct ctl_table callhome_table[] = {
{
.procname = "callhome",
.data = &callhome_enabled,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_handler_callhome,
.proc_handler = proc_dointvec_minmax,
.extra1 = &zero,
.extra2 = &one,
},
{}
};

8
drivers/s390/char/tape_3590.c
View File

@ -113,16 +113,16 @@ static int crypt_enabled(struct tape_device *device)
static void ext_to_int_kekl(struct tape390_kekl *in,
struct tape3592_kekl *out)
{
int i;
int len;
memset(out, 0, sizeof(*out));
if (in->type == TAPE390_KEKL_TYPE_HASH)
out->flags |= 0x40;
if (in->type_on_tape == TAPE390_KEKL_TYPE_HASH)
out->flags |= 0x80;
strncpy(out->label, in->label, 64);
for (i = strlen(in->label); i < sizeof(out->label); i++)
out->label[i] = ' ';
len = min(sizeof(out->label), strlen(in->label));
memcpy(out->label, in->label, len);
memset(out->label + len, ' ', sizeof(out->label) - len);
ASCEBC(out->label, sizeof(out->label));
}

6
drivers/s390/char/tape_class.c
View File

@ -54,10 +54,10 @@ struct tape_class_device *register_tape_dev(
if (!tcd)
return ERR_PTR(-ENOMEM);
strncpy(tcd->device_name, device_name, TAPECLASS_NAME_LEN);
strlcpy(tcd->device_name, device_name, TAPECLASS_NAME_LEN);
for (s = strchr(tcd->device_name, '/'); s; s = strchr(s, '/'))
*s = '!';
strncpy(tcd->mode_name, mode_name, TAPECLASS_NAME_LEN);
strlcpy(tcd->mode_name, mode_name, TAPECLASS_NAME_LEN);
for (s = strchr(tcd->mode_name, '/'); s; s = strchr(s, '/'))
*s = '!';
@ -77,7 +77,7 @@ struct tape_class_device *register_tape_dev(
tcd->class_device = device_create(tape_class, device,
tcd->char_device->dev, NULL,
"%s", tcd->device_name);
rc = PTR_RET(tcd->class_device);
rc = PTR_ERR_OR_ZERO(tcd->class_device);
if (rc)
goto fail_with_cdev;
rc = sysfs_create_link(

21
drivers/s390/cio/chp.c
View File

@ -471,14 +471,17 @@ int chp_new(struct chp_id chpid)
{
struct channel_subsystem *css = css_by_id(chpid.cssid);
struct channel_path *chp;
int ret;
int ret = 0;
mutex_lock(&css->mutex);
if (chp_is_registered(chpid))
return 0;
chp = kzalloc(sizeof(struct channel_path), GFP_KERNEL);
if (!chp)
return -ENOMEM;
goto out;
chp = kzalloc(sizeof(struct channel_path), GFP_KERNEL);
if (!chp) {
ret = -ENOMEM;
goto out;
}
/* fill in status, etc. */
chp->chpid = chpid;
chp->state = 1;
@ -505,21 +508,20 @@ int chp_new(struct chp_id chpid)
put_device(&chp->dev);
goto out;
}
mutex_lock(&css->mutex);
if (css->cm_enabled) {
ret = chp_add_cmg_attr(chp);
if (ret) {
device_unregister(&chp->dev);
mutex_unlock(&css->mutex);
goto out;
}
}
css->chps[chpid.id] = chp;
mutex_unlock(&css->mutex);
goto out;
out_free:
kfree(chp);
out:
mutex_unlock(&css->mutex);
return ret;
}
@ -585,8 +587,7 @@ static void chp_process_crw(struct crw *crw0, struct crw *crw1,
switch (crw0->erc) {
case CRW_ERC_IPARM: /* Path has come. */
case CRW_ERC_INIT:
if (!chp_is_registered(chpid))
chp_new(chpid);
chp_new(chpid);
chsc_chp_online(chpid);
break;
case CRW_ERC_PERRI: /* Path has gone. */

18
drivers/s390/cio/chsc.c
View File

@ -91,7 +91,7 @@ struct chsc_ssd_area {
u16 sch; /* subchannel */
u8 chpid[8]; /* chpids 0-7 */
u16 fla[8]; /* full link addresses 0-7 */
} __attribute__ ((packed));
} __packed __aligned(PAGE_SIZE);
int chsc_get_ssd_info(struct subchannel_id schid, struct chsc_ssd_info *ssd)
{
@ -319,7 +319,7 @@ struct chsc_sei {
struct chsc_sei_nt2_area nt2_area;
u8 nt_area[PAGE_SIZE - 24];
} u;
} __packed;
} __packed __aligned(PAGE_SIZE);
/*
* Node Descriptor as defined in SA22-7204, "Common I/O-Device Commands"
@ -841,7 +841,7 @@ int __chsc_do_secm(struct channel_subsystem *css, int enable)
u32 : 4;
u32 fmt : 4;
u32 : 16;
} __attribute__ ((packed)) *secm_area;
} *secm_area;
unsigned long flags;
int ret, ccode;
@ -1014,7 +1014,7 @@ int chsc_get_channel_measurement_chars(struct channel_path *chp)
u32 cmg : 8;
u32 zeroes3;
u32 data[NR_MEASUREMENT_CHARS];
} __attribute__ ((packed)) *scmc_area;
} *scmc_area;
chp->shared = -1;
chp->cmg = -1;
@ -1142,7 +1142,7 @@ int __init chsc_get_cssid(int idx)
u8 cssid;
u32 : 24;
} list[0];
} __packed *sdcal_area;
} *sdcal_area;
int ret;
spin_lock_irq(&chsc_page_lock);
@ -1192,7 +1192,7 @@ chsc_determine_css_characteristics(void)
u32 reserved4;
u32 general_char[510];
u32 chsc_char[508];
} __attribute__ ((packed)) *scsc_area;
} *scsc_area;
spin_lock_irqsave(&chsc_page_lock, flags);
memset(chsc_page, 0, PAGE_SIZE);
@ -1236,7 +1236,7 @@ int chsc_sstpc(void *page, unsigned int op, u16 ctrl, u64 *clock_delta)
unsigned int rsvd3[3];
u64 clock_delta;
unsigned int rsvd4[2];
} __attribute__ ((packed)) *rr;
} *rr;
int rc;
memset(page, 0, PAGE_SIZE);
@ -1261,7 +1261,7 @@ int chsc_sstpi(void *page, void *result, size_t size)
unsigned int rsvd0[3];
struct chsc_header response;
char data[];
} __attribute__ ((packed)) *rr;
} *rr;
int rc;
memset(page, 0, PAGE_SIZE);
@ -1284,7 +1284,7 @@ int chsc_siosl(struct subchannel_id schid)
u32 word3;
struct chsc_header response;
u32 word[11];
} __attribute__ ((packed)) *siosl_area;
} *siosl_area;
unsigned long flags;
int ccode;
int rc;

18
drivers/s390/cio/chsc.h
View File

@ -15,12 +15,12 @@
#define NR_MEASUREMENT_CHARS 5
struct cmg_chars {
u32 values[NR_MEASUREMENT_CHARS];
} __attribute__ ((packed));
};
#define NR_MEASUREMENT_ENTRIES 8
struct cmg_entry {
u32 values[NR_MEASUREMENT_ENTRIES];
} __attribute__ ((packed));
};
struct channel_path_desc_fmt1 {
u8 flags;
@ -38,7 +38,7 @@ struct channel_path_desc_fmt1 {
u8 s:1;
u8 f:1;
u32 zeros[2];
} __attribute__ ((packed));
};
struct channel_path_desc_fmt3 {
struct channel_path_desc_fmt1 fmt1_desc;
@ -59,7 +59,7 @@ struct css_chsc_char {
u32:7;
u32 pnso:1; /* bit 116 */
u32:11;
}__attribute__((packed));
} __packed;
extern struct css_chsc_char css_chsc_characteristics;
@ -82,7 +82,7 @@ struct chsc_ssqd_area {
struct chsc_header response;
u32:32;
struct qdio_ssqd_desc qdio_ssqd;
} __packed;
} __packed __aligned(PAGE_SIZE);
struct chsc_scssc_area {
struct chsc_header request;
@ -102,7 +102,7 @@ struct chsc_scssc_area {
u32 reserved[1004];
struct chsc_header response;
u32:32;
} __packed;
} __packed __aligned(PAGE_SIZE);
struct chsc_scpd {
struct chsc_header request;
@ -120,7 +120,7 @@ struct chsc_scpd {
struct chsc_header response;
u32:32;
u8 data[0];
} __packed;
} __packed __aligned(PAGE_SIZE);
struct chsc_sda_area {
struct chsc_header request;
@ -199,7 +199,7 @@ struct chsc_scm_info {
u32 reserved2[10];
u64 restok;
struct sale scmal[248];
} __packed;
} __packed __aligned(PAGE_SIZE);
int chsc_scm_info(struct chsc_scm_info *scm_area, u64 token);
@ -243,7 +243,7 @@ struct chsc_pnso_area {
struct qdio_brinfo_entry_l3_ipv4 l3_ipv4[0];
struct qdio_brinfo_entry_l2 l2[0];
} entries;
} __packed;
} __packed __aligned(PAGE_SIZE);
int chsc_pnso_brinfo(struct subchannel_id schid,
struct chsc_pnso_area *brinfo_area,

77
drivers/s390/cio/cio.c
View File

@ -526,76 +526,6 @@ int cio_disable_subchannel(struct subchannel *sch)
}
EXPORT_SYMBOL_GPL(cio_disable_subchannel);
static int cio_check_devno_blacklisted(struct subchannel *sch)
{
if (is_blacklisted(sch->schid.ssid, sch->schib.pmcw.dev)) {
/*
* This device must not be known to Linux. So we simply
* say that there is no device and return ENODEV.
*/
CIO_MSG_EVENT(6, "Blacklisted device detected "
"at devno %04X, subchannel set %x\n",
sch->schib.pmcw.dev, sch->schid.ssid);
return -ENODEV;
}
return 0;
}
/**
* cio_validate_subchannel - basic validation of subchannel
* @sch: subchannel structure to be filled out
* @schid: subchannel id
*
* Find out subchannel type and initialize struct subchannel.
* Return codes:
* 0 on success
* -ENXIO for non-defined subchannels
* -ENODEV for invalid subchannels or blacklisted devices
* -EIO for subchannels in an invalid subchannel set
*/
int cio_validate_subchannel(struct subchannel *sch, struct subchannel_id schid)
{
char dbf_txt[15];
int ccode;
int err;
sprintf(dbf_txt, "valsch%x", schid.sch_no);
CIO_TRACE_EVENT(4, dbf_txt);
/*
* The first subchannel that is not-operational (ccode==3)
* indicates that there aren't any more devices available.
* If stsch gets an exception, it means the current subchannel set
* is not valid.
*/
ccode = stsch(schid, &sch->schib);
if (ccode) {
err = (ccode == 3) ? -ENXIO : ccode;
goto out;
}
sch->st = sch->schib.pmcw.st;
sch->schid = schid;
switch (sch->st) {
case SUBCHANNEL_TYPE_IO:
case SUBCHANNEL_TYPE_MSG:
if (!css_sch_is_valid(&sch->schib))
err = -ENODEV;
else
err = cio_check_devno_blacklisted(sch);
break;
default:
err = 0;
}
if (err)
goto out;
CIO_MSG_EVENT(4, "Subchannel 0.%x.%04x reports subchannel type %04X\n",
sch->schid.ssid, sch->schid.sch_no, sch->st);
out:
return err;
}
/*
* do_cio_interrupt() handles all normal I/O device IRQ's
*/
@ -719,6 +649,7 @@ struct subchannel *cio_probe_console(void)
{
struct subchannel_id schid;
struct subchannel *sch;
struct schib schib;
int sch_no, ret;
sch_no = cio_get_console_sch_no();
@ -728,7 +659,11 @@ struct subchannel *cio_probe_console(void)
}
init_subchannel_id(&schid);
schid.sch_no = sch_no;
sch = css_alloc_subchannel(schid);
ret = stsch(schid, &schib);
if (ret)
return ERR_PTR(-ENODEV);
sch = css_alloc_subchannel(schid, &schib);
if (IS_ERR(sch))
return sch;

1
drivers/s390/cio/cio.h
View File

@ -119,7 +119,6 @@ DECLARE_PER_CPU(struct irb, cio_irb);
#define to_subchannel(n) container_of(n, struct subchannel, dev)
extern int cio_validate_subchannel (struct subchannel *, struct subchannel_id);
extern int cio_enable_subchannel(struct subchannel *, u32);
extern int cio_disable_subchannel (struct subchannel *);
extern int cio_cancel (struct subchannel *);

82
drivers/s390/cio/css.c
View File

@ -25,6 +25,7 @@
#include "css.h"
#include "cio.h"
#include "blacklist.h"
#include "cio_debug.h"
#include "ioasm.h"
#include "chsc.h"
@ -168,18 +169,53 @@ static void css_subchannel_release(struct device *dev)
kfree(sch);
}
struct subchannel *css_alloc_subchannel(struct subchannel_id schid)
static int css_validate_subchannel(struct subchannel_id schid,
struct schib *schib)
{
int err;
switch (schib->pmcw.st) {
case SUBCHANNEL_TYPE_IO:
case SUBCHANNEL_TYPE_MSG:
if (!css_sch_is_valid(schib))
err = -ENODEV;
else if (is_blacklisted(schid.ssid, schib->pmcw.dev)) {
CIO_MSG_EVENT(6, "Blacklisted device detected "
"at devno %04X, subchannel set %x\n",
schib->pmcw.dev, schid.ssid);
err = -ENODEV;
} else
err = 0;
break;
default:
err = 0;
}
if (err)
goto out;
CIO_MSG_EVENT(4, "Subchannel 0.%x.%04x reports subchannel type %04X\n",
schid.ssid, schid.sch_no, schib->pmcw.st);
out:
return err;
}
struct subchannel *css_alloc_subchannel(struct subchannel_id schid,
struct schib *schib)
{
struct subchannel *sch;
int ret;
ret = css_validate_subchannel(schid, schib);
if (ret < 0)
return ERR_PTR(ret);
sch = kzalloc(sizeof(*sch), GFP_KERNEL | GFP_DMA);
if (!sch)
return ERR_PTR(-ENOMEM);
ret = cio_validate_subchannel(sch, schid);
if (ret < 0)
goto err;
sch->schid = schid;
sch->schib = *schib;
sch->st = schib->pmcw.st;
ret = css_sch_create_locks(sch);
if (ret)
@ -244,8 +280,7 @@ static void ssd_register_chpids(struct chsc_ssd_info *ssd)
for (i = 0; i < 8; i++) {
mask = 0x80 >> i;
if (ssd->path_mask & mask)
if (!chp_is_registered(ssd->chpid[i]))
chp_new(ssd->chpid[i]);
chp_new(ssd->chpid[i]);
}
}
@ -382,12 +417,12 @@ int css_register_subchannel(struct subchannel *sch)
return ret;
}
static int css_probe_device(struct subchannel_id schid)
static int css_probe_device(struct subchannel_id schid, struct schib *schib)
{
struct subchannel *sch;
int ret;
sch = css_alloc_subchannel(schid);
sch = css_alloc_subchannel(schid, schib);
if (IS_ERR(sch))
return PTR_ERR(sch);
@ -436,23 +471,23 @@ EXPORT_SYMBOL_GPL(css_sch_is_valid);
static int css_evaluate_new_subchannel(struct subchannel_id schid, int slow)
{
struct schib schib;
int ccode;
if (!slow) {
/* Will be done on the slow path. */
return -EAGAIN;
}
if (stsch(schid, &schib)) {
/* Subchannel is not provided. */
return -ENXIO;
}
if (!css_sch_is_valid(&schib)) {
/* Unusable - ignore. */
return 0;
}
CIO_MSG_EVENT(4, "event: sch 0.%x.%04x, new\n", schid.ssid,
schid.sch_no);
/*
* The first subchannel that is not-operational (ccode==3)
* indicates that there aren't any more devices available.
* If stsch gets an exception, it means the current subchannel set
* is not valid.
*/
ccode = stsch(schid, &schib);
if (ccode)
return (ccode == 3) ? -ENXIO : ccode;
return css_probe_device(schid);
return css_probe_device(schid, &schib);
}
static int css_evaluate_known_subchannel(struct subchannel *sch, int slow)
@ -1081,6 +1116,11 @@ static int __init channel_subsystem_init(void)
if (ret)
goto out_wq;
/* Register subchannels which are already in use. */
cio_register_early_subchannels();
/* Start initial subchannel evaluation. */
css_schedule_eval_all();
return ret;
out_wq:
destroy_workqueue(cio_work_q);
@ -1120,10 +1160,6 @@ int css_complete_work(void)
*/
static int __init channel_subsystem_init_sync(void)
{
/* Register subchannels which are already in use. */
cio_register_early_subchannels();
/* Start initial subchannel evaluation. */
css_schedule_eval_all();
css_complete_work();
return 0;
}

3
drivers/s390/cio/css.h
View File

@ -103,7 +103,8 @@ extern void css_driver_unregister(struct css_driver *);
extern void css_sch_device_unregister(struct subchannel *);
extern int css_register_subchannel(struct subchannel *);
extern struct subchannel *css_alloc_subchannel(struct subchannel_id);
extern struct subchannel *css_alloc_subchannel(struct subchannel_id,
struct schib *schib);
extern struct subchannel *get_subchannel_by_schid(struct subchannel_id);
extern int css_init_done;
extern int max_ssid;

5
drivers/s390/cio/qdio_main.c
View File

@ -631,21 +631,20 @@ static inline unsigned long qdio_aob_for_buffer(struct qdio_output_q *q,
unsigned long phys_aob = 0;
if (!q->use_cq)
goto out;
return 0;
if (!q->aobs[bufnr]) {
struct qaob *aob = qdio_allocate_aob();
q->aobs[bufnr] = aob;
}
if (q->aobs[bufnr]) {
q->sbal_state[bufnr].flags = QDIO_OUTBUF_STATE_FLAG_NONE;
q->sbal_state[bufnr].aob = q->aobs[bufnr];
q->aobs[bufnr]->user1 = (u64) q->sbal_state[bufnr].user;
phys_aob = virt_to_phys(q->aobs[bufnr]);
WARN_ON_ONCE(phys_aob & 0xFF);
}
out:
q->sbal_state[bufnr].flags = 0;
return phys_aob;
}

102
drivers/s390/cio/trace.h
View File

@ -30,6 +30,17 @@ DECLARE_EVENT_CLASS(s390_class_schib,
__field(u16, schno)
__field(u16, devno)
__field_struct(struct schib, schib)
__field(u8, pmcw_ena)
__field(u8, pmcw_st)
__field(u8, pmcw_dnv)
__field(u16, pmcw_dev)
__field(u8, pmcw_lpm)
__field(u8, pmcw_pnom)
__field(u8, pmcw_lpum)
__field(u8, pmcw_pim)
__field(u8, pmcw_pam)
__field(u8, pmcw_pom)
__field(u64, pmcw_chpid)
__field(int, cc)
),
TP_fast_assign(
@ -38,18 +49,29 @@ DECLARE_EVENT_CLASS(s390_class_schib,
__entry->schno = schid.sch_no;
__entry->devno = schib->pmcw.dev;
__entry->schib = *schib;
__entry->pmcw_ena = schib->pmcw.ena;
__entry->pmcw_st = schib->pmcw.ena;
__entry->pmcw_dnv = schib->pmcw.dnv;
__entry->pmcw_dev = schib->pmcw.dev;
__entry->pmcw_lpm = schib->pmcw.lpm;
__entry->pmcw_pnom = schib->pmcw.pnom;
__entry->pmcw_lpum = schib->pmcw.lpum;
__entry->pmcw_pim = schib->pmcw.pim;
__entry->pmcw_pam = schib->pmcw.pam;
__entry->pmcw_pom = schib->pmcw.pom;
memcpy(&__entry->pmcw_chpid, &schib->pmcw.chpid, 8);
__entry->cc = cc;
),
TP_printk("schid=%x.%x.%04x cc=%d ena=%d st=%d dnv=%d dev=%04x "
"lpm=0x%02x pnom=0x%02x lpum=0x%02x pim=0x%02x pam=0x%02x "
"pom=0x%02x chpids=%016llx",
__entry->cssid, __entry->ssid, __entry->schno, __entry->cc,
__entry->schib.pmcw.ena, __entry->schib.pmcw.st,
__entry->schib.pmcw.dnv, __entry->schib.pmcw.dev,
__entry->schib.pmcw.lpm, __entry->schib.pmcw.pnom,
__entry->schib.pmcw.lpum, __entry->schib.pmcw.pim,
__entry->schib.pmcw.pam, __entry->schib.pmcw.pom,
*((u64 *) __entry->schib.pmcw.chpid)
__entry->pmcw_ena, __entry->pmcw_st,
__entry->pmcw_dnv, __entry->pmcw_dev,
__entry->pmcw_lpm, __entry->pmcw_pnom,
__entry->pmcw_lpum, __entry->pmcw_pim,
__entry->pmcw_pam, __entry->pmcw_pom,
__entry->pmcw_chpid
)
);
@ -89,6 +111,13 @@ TRACE_EVENT(s390_cio_tsch,
__field(u8, ssid)
__field(u16, schno)
__field_struct(struct irb, irb)
__field(u8, scsw_dcc)
__field(u8, scsw_pno)
__field(u8, scsw_fctl)
__field(u8, scsw_actl)
__field(u8, scsw_stctl)
__field(u8, scsw_dstat)
__field(u8, scsw_cstat)
__field(int, cc)
),
TP_fast_assign(
@ -96,15 +125,22 @@ TRACE_EVENT(s390_cio_tsch,
__entry->ssid = schid.ssid;
__entry->schno = schid.sch_no;
__entry->irb = *irb;
__entry->scsw_dcc = scsw_cc(&irb->scsw);
__entry->scsw_pno = scsw_pno(&irb->scsw);
__entry->scsw_fctl = scsw_fctl(&irb->scsw);
__entry->scsw_actl = scsw_actl(&irb->scsw);
__entry->scsw_stctl = scsw_stctl(&irb->scsw);
__entry->scsw_dstat = scsw_dstat(&irb->scsw);
__entry->scsw_cstat = scsw_cstat(&irb->scsw);
__entry->cc = cc;
),
TP_printk("schid=%x.%x.%04x cc=%d dcc=%d pno=%d fctl=0x%x actl=0x%x "
"stctl=0x%x dstat=0x%x cstat=0x%x",
__entry->cssid, __entry->ssid, __entry->schno, __entry->cc,
scsw_cc(&__entry->irb.scsw), scsw_pno(&__entry->irb.scsw),
scsw_fctl(&__entry->irb.scsw), scsw_actl(&__entry->irb.scsw),
scsw_stctl(&__entry->irb.scsw),
scsw_dstat(&__entry->irb.scsw), scsw_cstat(&__entry->irb.scsw)
__entry->scsw_dcc, __entry->scsw_pno,
__entry->scsw_fctl, __entry->scsw_actl,
__entry->scsw_stctl,
__entry->scsw_dstat, __entry->scsw_cstat
)
);
@ -122,6 +158,9 @@ TRACE_EVENT(s390_cio_tpi,
__field(u8, cssid)
__field(u8, ssid)
__field(u16, schno)
__field(u8, adapter_IO)
__field(u8, isc)
__field(u8, type)
),
TP_fast_assign(
__entry->cc = cc;
@ -136,11 +175,14 @@ TRACE_EVENT(s390_cio_tpi,
__entry->cssid = __entry->tpi_info.schid.cssid;
__entry->ssid = __entry->tpi_info.schid.ssid;
__entry->schno = __entry->tpi_info.schid.sch_no;
__entry->adapter_IO = __entry->tpi_info.adapter_IO;
__entry->isc = __entry->tpi_info.isc;
__entry->type = __entry->tpi_info.type;
),
TP_printk("schid=%x.%x.%04x cc=%d a=%d isc=%d type=%d",
__entry->cssid, __entry->ssid, __entry->schno, __entry->cc,
__entry->tpi_info.adapter_IO, __entry->tpi_info.isc,
__entry->tpi_info.type
__entry->adapter_IO, __entry->isc,
__entry->type
)
);
@ -299,16 +341,20 @@ TRACE_EVENT(s390_cio_interrupt,
__field(u8, cssid)
__field(u8, ssid)
__field(u16, schno)
__field(u8, isc)
__field(u8, type)
),
TP_fast_assign(
__entry->tpi_info = *tpi_info;
__entry->cssid = __entry->tpi_info.schid.cssid;
__entry->ssid = __entry->tpi_info.schid.ssid;
__entry->schno = __entry->tpi_info.schid.sch_no;
__entry->cssid = tpi_info->schid.cssid;
__entry->ssid = tpi_info->schid.ssid;
__entry->schno = tpi_info->schid.sch_no;
__entry->isc = tpi_info->isc;
__entry->type = tpi_info->type;
),
TP_printk("schid=%x.%x.%04x isc=%d type=%d",
__entry->cssid, __entry->ssid, __entry->schno,
__entry->tpi_info.isc, __entry->tpi_info.type
__entry->isc, __entry->type
)
);
@ -321,11 +367,13 @@ TRACE_EVENT(s390_cio_adapter_int,
TP_ARGS(tpi_info),
TP_STRUCT__entry(
__field_struct(struct tpi_info, tpi_info)
__field(u8, isc)
),
TP_fast_assign(
__entry->tpi_info = *tpi_info;
__entry->isc = tpi_info->isc;
),
TP_printk("isc=%d", __entry->tpi_info.isc)
TP_printk("isc=%d", __entry->isc)
);
/**
@ -339,16 +387,30 @@ TRACE_EVENT(s390_cio_stcrw,
TP_STRUCT__entry(
__field_struct(struct crw, crw)
__field(int, cc)
__field(u8, slct)
__field(u8, oflw)
__field(u8, chn)
__field(u8, rsc)
__field(u8, anc)
__field(u8, erc)
__field(u16, rsid)
),
TP_fast_assign(
__entry->crw = *crw;
__entry->cc = cc;
__entry->slct = crw->slct;
__entry->oflw = crw->oflw;
__entry->chn = crw->chn;
__entry->rsc = crw->rsc;
__entry->anc = crw->anc;
__entry->erc = crw->erc;
__entry->rsid = crw->rsid;
),
TP_printk("cc=%d slct=%d oflw=%d chn=%d rsc=%d anc=%d erc=0x%x "
"rsid=0x%x",
__entry->cc, __entry->crw.slct, __entry->crw.oflw,
__entry->crw.chn, __entry->crw.rsc, __entry->crw.anc,
__entry->crw.erc, __entry->crw.rsid
__entry->cc, __entry->slct, __entry->oflw,
__entry->chn, __entry->rsc, __entry->anc,
__entry->erc, __entry->rsid
)
);

236
drivers/s390/crypto/ap_asm.h
View File

@ -1,236 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright IBM Corp. 2016
* Author(s): Martin Schwidefsky <schwidefsky@de.ibm.com>
*
* Adjunct processor bus inline assemblies.
*/
#ifndef _AP_ASM_H_
#define _AP_ASM_H_
#include <asm/isc.h>
/**
* ap_intructions_available() - Test if AP instructions are available.
*
* Returns 0 if the AP instructions are installed.
*/
static inline int ap_instructions_available(void)
{
register unsigned long reg0 asm ("0") = AP_MKQID(0, 0);
register unsigned long reg1 asm ("1") = -ENODEV;
register unsigned long reg2 asm ("2") = 0UL;
asm volatile(
" .long 0xb2af0000\n" /* PQAP(TAPQ) */
"0: la %1,0\n"
"1:\n"
EX_TABLE(0b, 1b)
: "+d" (reg0), "+d" (reg1), "+d" (reg2) : : "cc");
return reg1;
}
/**
* ap_tapq(): Test adjunct processor queue.
* @qid: The AP queue number
* @info: Pointer to queue descriptor
*
* Returns AP queue status structure.
*/
static inline struct ap_queue_status ap_tapq(ap_qid_t qid, unsigned long *info)
{
register unsigned long reg0 asm ("0") = qid;
register struct ap_queue_status reg1 asm ("1");
register unsigned long reg2 asm ("2") = 0UL;
asm volatile(".long 0xb2af0000" /* PQAP(TAPQ) */
: "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc");
if (info)
*info = reg2;
return reg1;
}
/**
* ap_pqap_rapq(): Reset adjunct processor queue.
* @qid: The AP queue number
*
* Returns AP queue status structure.
*/
static inline struct ap_queue_status ap_rapq(ap_qid_t qid)
{
register unsigned long reg0 asm ("0") = qid | 0x01000000UL;
register struct ap_queue_status reg1 asm ("1");
register unsigned long reg2 asm ("2") = 0UL;
asm volatile(
".long 0xb2af0000" /* PQAP(RAPQ) */
: "+d" (reg0), "=d" (reg1), "+d" (reg2) : : "cc");
return reg1;
}
/**
* ap_aqic(): Control interruption for a specific AP.
* @qid: The AP queue number
* @qirqctrl: struct ap_qirq_ctrl (64 bit value)
* @ind: The notification indicator byte
*
* Returns AP queue status.
*/
static inline struct ap_queue_status ap_aqic(ap_qid_t qid,
struct ap_qirq_ctrl qirqctrl,
void *ind)
{
register unsigned long reg0 asm ("0") = qid | (3UL << 24);
register struct ap_qirq_ctrl reg1_in asm ("1") = qirqctrl;
register struct ap_queue_status reg1_out asm ("1");
register void *reg2 asm ("2") = ind;
asm volatile(
".long 0xb2af0000" /* PQAP(AQIC) */
: "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2)
:
: "cc");
return reg1_out;
}
/**
* ap_qci(): Get AP configuration data
*
* Returns 0 on success, or -EOPNOTSUPP.
*/
static inline int ap_qci(void *config)
{
register unsigned long reg0 asm ("0") = 0x04000000UL;
register unsigned long reg1 asm ("1") = -EINVAL;
register void *reg2 asm ("2") = (void *) config;
asm volatile(
".long 0xb2af0000\n" /* PQAP(QCI) */
"0: la %1,0\n"
"1:\n"
EX_TABLE(0b, 1b)
: "+d" (reg0), "+d" (reg1), "+d" (reg2)
:
: "cc", "memory");
return reg1;
}
/*
* union ap_qact_ap_info - used together with the
* ap_aqic() function to provide a convenient way
* to handle the ap info needed by the qact function.
*/
union ap_qact_ap_info {
unsigned long val;
struct {
unsigned int : 3;
unsigned int mode : 3;
unsigned int : 26;
unsigned int cat : 8;
unsigned int : 8;
unsigned char ver[2];
};
};
/**
* ap_qact(): Query AP combatibility type.
* @qid: The AP queue number
* @apinfo: On input the info about the AP queue. On output the
* alternate AP queue info provided by the qact function
* in GR2 is stored in.
*
* Returns AP queue status. Check response_code field for failures.
*/
static inline struct ap_queue_status ap_qact(ap_qid_t qid, int ifbit,
union ap_qact_ap_info *apinfo)
{
register unsigned long reg0 asm ("0") = qid | (5UL << 24)
| ((ifbit & 0x01) << 22);
register unsigned long reg1_in asm ("1") = apinfo->val;
register struct ap_queue_status reg1_out asm ("1");
register unsigned long reg2 asm ("2") = 0;
asm volatile(
".long 0xb2af0000" /* PQAP(QACT) */
: "+d" (reg0), "+d" (reg1_in), "=d" (reg1_out), "+d" (reg2)
: : "cc");
apinfo->val = reg2;
return reg1_out;
}
/**
* ap_nqap(): Send message to adjunct processor queue.
* @qid: The AP queue number
* @psmid: The program supplied message identifier
* @msg: The message text
* @length: The message length
*
* Returns AP queue status structure.
* Condition code 1 on NQAP can't happen because the L bit is 1.
* Condition code 2 on NQAP also means the send is incomplete,
* because a segment boundary was reached. The NQAP is repeated.
*/
static inline struct ap_queue_status ap_nqap(ap_qid_t qid,
unsigned long long psmid,
void *msg, size_t length)
{
register unsigned long reg0 asm ("0") = qid | 0x40000000UL;
register struct ap_queue_status reg1 asm ("1");
register unsigned long reg2 asm ("2") = (unsigned long) msg;
register unsigned long reg3 asm ("3") = (unsigned long) length;
register unsigned long reg4 asm ("4") = (unsigned int) (psmid >> 32);
register unsigned long reg5 asm ("5") = psmid & 0xffffffff;
asm volatile (
"0: .long 0xb2ad0042\n" /* NQAP */
" brc 2,0b"
: "+d" (reg0), "=d" (reg1), "+d" (reg2), "+d" (reg3)
: "d" (reg4), "d" (reg5)
: "cc", "memory");
return reg1;
}
/**
* ap_dqap(): Receive message from adjunct processor queue.
* @qid: The AP queue number
* @psmid: Pointer to program supplied message identifier
* @msg: The message text
* @length: The message length
*
* Returns AP queue status structure.
* Condition code 1 on DQAP means the receive has taken place
* but only partially. The response is incomplete, hence the
* DQAP is repeated.
* Condition code 2 on DQAP also means the receive is incomplete,
* this time because a segment boundary was reached. Again, the
* DQAP is repeated.
* Note that gpr2 is used by the DQAP instruction to keep track of
* any 'residual' length, in case the instruction gets interrupted.
* Hence it gets zeroed before the instruction.
*/
static inline struct ap_queue_status ap_dqap(ap_qid_t qid,
unsigned long long *psmid,
void *msg, size_t length)
{
register unsigned long reg0 asm("0") = qid | 0x80000000UL;
register struct ap_queue_status reg1 asm ("1");
register unsigned long reg2 asm("2") = 0UL;
register unsigned long reg4 asm("4") = (unsigned long) msg;
register unsigned long reg5 asm("5") = (unsigned long) length;
register unsigned long reg6 asm("6") = 0UL;
register unsigned long reg7 asm("7") = 0UL;
asm volatile(
"0: .long 0xb2ae0064\n" /* DQAP */
" brc 6,0b\n"
: "+d" (reg0), "=d" (reg1), "+d" (reg2),
"+d" (reg4), "+d" (reg5), "+d" (reg6), "+d" (reg7)
: : "cc", "memory");
*psmid = (((unsigned long long) reg6) << 32) + reg7;
return reg1;
}
#endif /* _AP_ASM_H_ */

25
drivers/s390/crypto/ap_bus.c
View File

@ -36,7 +36,6 @@
#include <linux/debugfs.h>
#include "ap_bus.h"
#include "ap_asm.h"
#include "ap_debug.h"
/*
@ -174,24 +173,6 @@ static inline int ap_qact_available(void)
return 0;
}
/**
* ap_test_queue(): Test adjunct processor queue.
* @qid: The AP queue number
* @tbit: Test facilities bit
* @info: Pointer to queue descriptor
*
* Returns AP queue status structure.
*/
struct ap_queue_status ap_test_queue(ap_qid_t qid,
int tbit,
unsigned long *info)
{
if (tbit)
qid |= 1UL << 23; /* set T bit*/
return ap_tapq(qid, info);
}
EXPORT_SYMBOL(ap_test_queue);
/*
* ap_query_configuration(): Fetch cryptographic config info
*
@ -200,7 +181,7 @@ EXPORT_SYMBOL(ap_test_queue);
* is returned, e.g. if the PQAP(QCI) instruction is not
* available, the return value will be -EOPNOTSUPP.
*/
int ap_query_configuration(struct ap_config_info *info)
static inline int ap_query_configuration(struct ap_config_info *info)
{
if (!ap_configuration_available())
return -EOPNOTSUPP;
@ -493,7 +474,7 @@ static int ap_poll_thread_start(void)
return 0;
mutex_lock(&ap_poll_thread_mutex);
ap_poll_kthread = kthread_run(ap_poll_thread, NULL, "appoll");
rc = PTR_RET(ap_poll_kthread);
rc = PTR_ERR_OR_ZERO(ap_poll_kthread);
if (rc)
ap_poll_kthread = NULL;
mutex_unlock(&ap_poll_thread_mutex);
@ -1261,7 +1242,7 @@ static int __init ap_module_init(void)
/* Create /sys/devices/ap. */
ap_root_device = root_device_register("ap");
rc = PTR_RET(ap_root_device);
rc = PTR_ERR_OR_ZERO(ap_root_device);
if (rc)
goto out_bus;

1
drivers/s390/crypto/ap_bus.h
View File

@ -15,6 +15,7 @@
#include <linux/device.h>
#include <linux/types.h>
#include <asm/isc.h>
#include <asm/ap.h>
#define AP_DEVICES 256 /* Number of AP devices. */

1
drivers/s390/crypto/ap_card.c
View File

@ -14,7 +14,6 @@
#include <asm/facility.h>
#include "ap_bus.h"
#include "ap_asm.h"
/*
* AP card related attributes.

20
drivers/s390/crypto/ap_queue.c
View File

@ -14,26 +14,6 @@
#include <asm/facility.h>
#include "ap_bus.h"
#include "ap_asm.h"
/**
* ap_queue_irq_ctrl(): Control interruption on a AP queue.
* @qirqctrl: struct ap_qirq_ctrl (64 bit value)
* @ind: The notification indicator byte
*
* Returns AP queue status.
*
* Control interruption on the given AP queue.
* Just a simple wrapper function for the low level PQAP(AQIC)
* instruction available for other kernel modules.
*/
struct ap_queue_status ap_queue_irq_ctrl(ap_qid_t qid,
struct ap_qirq_ctrl qirqctrl,
void *ind)
{
return ap_aqic(qid, qirqctrl, ind);
}
EXPORT_SYMBOL(ap_queue_irq_ctrl);
/**
* ap_queue_enable_interruption(): Enable interruption on an AP queue.

2
drivers/s390/crypto/pkey_api.c
View File

@ -699,7 +699,7 @@ static int query_crypto_facility(u16 cardnr, u16 domain,
/* fill request cprb param block with FQ request */
preqparm = (struct fqreqparm *) preqcblk->req_parmb;
memcpy(preqparm->subfunc_code, "FQ", 2);
strncpy(preqparm->rule_array, keyword, sizeof(preqparm->rule_array));
memcpy(preqparm->rule_array, keyword, sizeof(preqparm->rule_array));
preqparm->rule_array_len =
sizeof(preqparm->rule_array_len) + sizeof(preqparm->rule_array);
preqparm->lv1.len = sizeof(preqparm->lv1);

12
drivers/s390/crypto/zcrypt_card.c
View File

@ -83,9 +83,21 @@ static ssize_t zcrypt_card_online_store(struct device *dev,
static DEVICE_ATTR(online, 0644, zcrypt_card_online_show,
zcrypt_card_online_store);
static ssize_t zcrypt_card_load_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zcrypt_card *zc = to_ap_card(dev)->private;
return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zc->load));
}
static DEVICE_ATTR(load, 0444, zcrypt_card_load_show, NULL);
static struct attribute *zcrypt_card_attrs[] = {
&dev_attr_type.attr,
&dev_attr_online.attr,
&dev_attr_load.attr,
NULL,
};

20
drivers/s390/crypto/zcrypt_cca_key.h
View File

@ -99,7 +99,7 @@ struct cca_pvt_ext_CRT_sec {
* @mex: pointer to user input data
* @p: pointer to memory area for the key
*
* Returns the size of the key area or -EFAULT
* Returns the size of the key area or negative errno value.
*/
static inline int zcrypt_type6_mex_key_en(struct ica_rsa_modexpo *mex, void *p)
{
@ -118,6 +118,15 @@ static inline int zcrypt_type6_mex_key_en(struct ica_rsa_modexpo *mex, void *p)
unsigned char *temp;
int i;
/*
* The inputdatalength was a selection criteria in the dispatching
* function zcrypt_rsa_modexpo(). However, do a plausibility check
* here to make sure the following copy_from_user() can't be utilized
* to compromise the system.
*/
if (WARN_ON_ONCE(mex->inputdatalength > 512))
return -EINVAL;
memset(key, 0, sizeof(*key));
key->pubHdr = static_pub_hdr;
@ -178,6 +187,15 @@ static inline int zcrypt_type6_crt_key(struct ica_rsa_modexpo_crt *crt, void *p)
struct cca_public_sec *pub;
int short_len, long_len, pad_len, key_len, size;
/*
* The inputdatalength was a selection criteria in the dispatching
* function zcrypt_rsa_crt(). However, do a plausibility check
* here to make sure the following copy_from_user() can't be utilized
* to compromise the system.
*/
if (WARN_ON_ONCE(crt->inputdatalength > 512))
return -EINVAL;
memset(key, 0, sizeof(*key));
short_len = (crt->inputdatalength + 1) / 2;

20
drivers/s390/crypto/zcrypt_msgtype6.c
View File

@ -246,7 +246,7 @@ int speed_idx_ep11(int req_type)
* @ap_msg: pointer to AP message
* @mex: pointer to user input data
*
* Returns 0 on success or -EFAULT.
* Returns 0 on success or negative errno value.
*/
static int ICAMEX_msg_to_type6MEX_msgX(struct zcrypt_queue *zq,
struct ap_message *ap_msg,
@ -272,6 +272,14 @@ static int ICAMEX_msg_to_type6MEX_msgX(struct zcrypt_queue *zq,
} __packed * msg = ap_msg->message;
int size;
/*
* The inputdatalength was a selection criteria in the dispatching
* function zcrypt_rsa_modexpo(). However, make sure the following
* copy_from_user() never exceeds the allocated buffer space.
*/
if (WARN_ON_ONCE(mex->inputdatalength > PAGE_SIZE))
return -EINVAL;
/* VUD.ciphertext */
msg->length = mex->inputdatalength + 2;
if (copy_from_user(msg->text, mex->inputdata, mex->inputdatalength))
@ -307,7 +315,7 @@ static int ICAMEX_msg_to_type6MEX_msgX(struct zcrypt_queue *zq,
* @ap_msg: pointer to AP message
* @crt: pointer to user input data
*
* Returns 0 on success or -EFAULT.
* Returns 0 on success or negative errno value.
*/
static int ICACRT_msg_to_type6CRT_msgX(struct zcrypt_queue *zq,
struct ap_message *ap_msg,
@ -334,6 +342,14 @@ static int ICACRT_msg_to_type6CRT_msgX(struct zcrypt_queue *zq,
} __packed * msg = ap_msg->message;
int size;
/*
* The inputdatalength was a selection criteria in the dispatching
* function zcrypt_rsa_crt(). However, make sure the following
* copy_from_user() never exceeds the allocated buffer space.
*/
if (WARN_ON_ONCE(crt->inputdatalength > PAGE_SIZE))
return -EINVAL;
/* VUD.ciphertext */
msg->length = crt->inputdatalength + 2;
if (copy_from_user(msg->text, crt->inputdata, crt->inputdatalength))

12
drivers/s390/crypto/zcrypt_queue.c
View File

@ -75,8 +75,20 @@ static ssize_t zcrypt_queue_online_store(struct device *dev,
static DEVICE_ATTR(online, 0644, zcrypt_queue_online_show,
zcrypt_queue_online_store);
static ssize_t zcrypt_queue_load_show(struct device *dev,
struct device_attribute *attr,
char *buf)
{
struct zcrypt_queue *zq = to_ap_queue(dev)->private;
return snprintf(buf, PAGE_SIZE, "%d\n", atomic_read(&zq->load));
}
static DEVICE_ATTR(load, 0444, zcrypt_queue_load_show, NULL);
static struct attribute *zcrypt_queue_attrs[] = {
&dev_attr_online.attr,
&dev_attr_load.attr,
NULL,
};

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