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powerpc fixes for 4.11 #3 

Five fairly small fixes for things that went in this cycle.
 
 A fairly large patch to rework the CAS logic on Power9, necessitated by a late
 change to the firmware API, and we can't boot without it.
 
 Three fixes going to stable, allowing more instructions to be emulated on LE,
 fixing a boot crash on 32-bit Freescale BookE machines, and the OPAL XICS
 workaround.
 
 And a patch from me to sort the selects under CONFIG PPC. Annoying churn, but
 worth it in the long run, and best for it to go in now to avoid conflicts.
 
 Thanks to:
   Alexey Kardashevskiy, Anton Blanchard, Balbir Singh, Gautham R. Shenoy,
   Laurentiu Tudor, Nicholas Piggin, Paul Mackerras, Ravi Bangoria, Sachin Sant,
   Shile Zhang, Suraj Jitindar Singh.
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Merge tag 'powerpc-4.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Five fairly small fixes for things that went in this cycle.

  A fairly large patch to rework the CAS logic on Power9, necessitated
  by a late change to the firmware API, and we can't boot without it.

  Three fixes going to stable, allowing more instructions to be emulated
  on LE, fixing a boot crash on 32-bit Freescale BookE machines, and the
  OPAL XICS workaround.

  And a patch from me to sort the selects under CONFIG PPC. Annoying
  churn, but worth it in the long run, and best for it to go in now to
  avoid conflicts.

  Thanks to:
    Alexey Kardashevskiy, Anton Blanchard, Balbir Singh, Gautham R.
    Shenoy, Laurentiu Tudor, Nicholas Piggin, Paul Mackerras, Ravi
    Bangoria, Sachin Sant, Shile Zhang, Suraj Jitindar Singh"

* tag 'powerpc-4.11-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc: Sort the selects under CONFIG_PPC
  powerpc/64: Fix L1D cache shape vector reporting L1I values
  powerpc/64: Avoid panic during boot due to divide by zero in init_cache_info()
  powerpc: Update to new option-vector-5 format for CAS
  powerpc: Parse the command line before calling CAS
  powerpc/xics: Work around limitations of OPAL XICS priority handling
  powerpc/64: Fix checksum folding in csum_add()
  powerpc/powernv: Fix opal tracepoints with JUMP_LABEL=n
  powerpc/booke: Fix boot crash due to null hugepd
  powerpc: Fix compiling a BE kernel with a powerpc64le toolchain
  selftest/powerpc: Fix false failures for skipped tests
  powerpc/powernv: Fix bug due to labeling ambiguity in power_enter_stop
  powerpc/64: Invalidate process table caching after setting process table
  powerpc: emulate_step() tests for load/store instructions
  powerpc: Emulation support for load/store instructions on LE
This commit is contained in:
Linus Torvalds 2017-03-07 10:46:10 -08:00
parent 8c2c8ed8b8 a7d2475af7
commit f7d6a7283a
20 changed files with 746 additions and 141 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

164
arch/powerpc/Kconfig
View File

@ -80,93 +80,99 @@ config ARCH_HAS_DMA_SET_COHERENT_MASK
config PPC
bool
default y
select BUILDTIME_EXTABLE_SORT
#
# Please keep this list sorted alphabetically.
#
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_DMA_SET_COHERENT_MASK
select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE
select ARCH_HAS_SG_CHAIN
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_MIGHT_HAVE_PC_SERIO
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
select ARCH_USE_BUILTIN_BSWAP
select ARCH_USE_CMPXCHG_LOCKREF if PPC64
select ARCH_WANT_IPC_PARSE_VERSION
select BINFMT_ELF
select ARCH_HAS_ELF_RANDOMIZE
select BUILDTIME_EXTABLE_SORT
select CLONE_BACKWARDS
select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
select EDAC_ATOMIC_SCRUB
select EDAC_SUPPORT
select GENERIC_ATOMIC64 if PPC32
select GENERIC_CLOCKEVENTS
select GENERIC_CLOCKEVENTS_BROADCAST if SMP
select GENERIC_CMOS_UPDATE
select GENERIC_CPU_AUTOPROBE
select GENERIC_IRQ_SHOW
select GENERIC_IRQ_SHOW_LEVEL
select GENERIC_SMP_IDLE_THREAD
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select GENERIC_TIME_VSYSCALL_OLD
select HAVE_ARCH_AUDITSYSCALL
select HAVE_ARCH_HARDENED_USERCOPY
select HAVE_ARCH_JUMP_LABEL
select HAVE_ARCH_KGDB
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
select HAVE_CBPF_JIT if !PPC64
select HAVE_CONTEXT_TRACKING if PPC64
select HAVE_DEBUG_KMEMLEAK
select HAVE_DEBUG_STACKOVERFLOW
select HAVE_DMA_API_DEBUG
select HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
select HAVE_EBPF_JIT if PPC64
select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_FUNCTION_TRACER
select HAVE_GCC_PLUGINS
select HAVE_GENERIC_RCU_GUP
select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
select HAVE_IDE
select HAVE_IOREMAP_PROT
select HAVE_IRQ_EXIT_ON_IRQ_STACK
select HAVE_KERNEL_GZIP
select HAVE_KPROBES
select HAVE_KRETPROBES
select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
select HAVE_MEMBLOCK
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_MOD_ARCH_SPECIFIC
select HAVE_NMI if PERF_EVENTS
select HAVE_OPROFILE
select HAVE_OPTPROBES if PPC64
select HAVE_PERF_EVENTS
select HAVE_PERF_EVENTS_NMI if PPC64
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
select HAVE_RCU_TABLE_FREE if SMP
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_VIRT_CPU_ACCOUNTING
select IRQ_DOMAIN
select IRQ_FORCED_THREADING
select MODULES_USE_ELF_RELA
select NO_BOOTMEM
select OF
select OF_EARLY_FLATTREE
select OF_RESERVED_MEM
select HAVE_FTRACE_MCOUNT_RECORD
select HAVE_DYNAMIC_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS if MPROFILE_KERNEL
select HAVE_FUNCTION_TRACER
select HAVE_FUNCTION_GRAPH_TRACER
select HAVE_GCC_PLUGINS
select OLD_SIGACTION if PPC32
select OLD_SIGSUSPEND
select SPARSE_IRQ
select SYSCTL_EXCEPTION_TRACE
select VIRT_TO_BUS if !PPC64
select HAVE_IDE
select HAVE_IOREMAP_PROT
select HAVE_EFFICIENT_UNALIGNED_ACCESS if !(CPU_LITTLE_ENDIAN && POWER7_CPU)
select HAVE_KPROBES
select HAVE_OPTPROBES if PPC64
select HAVE_ARCH_KGDB
select HAVE_KRETPROBES
select HAVE_ARCH_TRACEHOOK
select HAVE_MEMBLOCK
select HAVE_MEMBLOCK_NODE_MAP
select HAVE_DMA_API_DEBUG
select HAVE_OPROFILE
select HAVE_DEBUG_KMEMLEAK
select ARCH_HAS_SG_CHAIN
select GENERIC_ATOMIC64 if PPC32
select HAVE_PERF_EVENTS
select HAVE_PERF_REGS
select HAVE_PERF_USER_STACK_DUMP
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_HW_BREAKPOINT if PERF_EVENTS && (PPC_BOOK3S || PPC_8xx)
select ARCH_WANT_IPC_PARSE_VERSION
select SPARSE_IRQ
select IRQ_DOMAIN
select GENERIC_IRQ_SHOW
select GENERIC_IRQ_SHOW_LEVEL
select IRQ_FORCED_THREADING
select HAVE_RCU_TABLE_FREE if SMP
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_CBPF_JIT if !PPC64
select HAVE_EBPF_JIT if PPC64
select HAVE_ARCH_JUMP_LABEL
select ARCH_HAVE_NMI_SAFE_CMPXCHG
select ARCH_HAS_GCOV_PROFILE_ALL
select GENERIC_SMP_IDLE_THREAD
select GENERIC_CMOS_UPDATE
select GENERIC_TIME_VSYSCALL_OLD
select GENERIC_CLOCKEVENTS
select GENERIC_CLOCKEVENTS_BROADCAST if SMP
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select GENERIC_STRNCPY_FROM_USER
select GENERIC_STRNLEN_USER
select HAVE_MOD_ARCH_SPECIFIC
select MODULES_USE_ELF_RELA
select CLONE_BACKWARDS
select ARCH_USE_BUILTIN_BSWAP
select OLD_SIGSUSPEND
select OLD_SIGACTION if PPC32
select HAVE_DEBUG_STACKOVERFLOW
select HAVE_IRQ_EXIT_ON_IRQ_STACK
select ARCH_USE_CMPXCHG_LOCKREF if PPC64
select HAVE_ARCH_AUDITSYSCALL
select ARCH_SUPPORTS_ATOMIC_RMW
select DCACHE_WORD_ACCESS if PPC64 && CPU_LITTLE_ENDIAN
select NO_BOOTMEM
select HAVE_GENERIC_RCU_GUP
select HAVE_PERF_EVENTS_NMI if PPC64
select HAVE_NMI if PERF_EVENTS
select EDAC_SUPPORT
select EDAC_ATOMIC_SCRUB
select ARCH_HAS_DMA_SET_COHERENT_MASK
select ARCH_HAS_DEVMEM_IS_ALLOWED
select HAVE_ARCH_SECCOMP_FILTER
select ARCH_HAS_UBSAN_SANITIZE_ALL
select ARCH_SUPPORTS_DEFERRED_STRUCT_PAGE_INIT
select HAVE_LIVEPATCH if HAVE_DYNAMIC_FTRACE_WITH_REGS
select GENERIC_CPU_AUTOPROBE
select HAVE_VIRT_CPU_ACCOUNTING
select ARCH_HAS_SCALED_CPUTIME if VIRT_CPU_ACCOUNTING_NATIVE
select HAVE_ARCH_HARDENED_USERCOPY
select HAVE_KERNEL_GZIP
select HAVE_CONTEXT_TRACKING if PPC64
#
# Please keep this list sorted alphabetically.
#
config GENERIC_CSUM
def_bool n

11
arch/powerpc/Makefile
View File

@ -72,8 +72,15 @@ GNUTARGET := powerpc
MULTIPLEWORD := -mmultiple
endif
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
ifdef CONFIG_PPC64
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mcall-aixdesc)
aflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mabi=elfv1)
aflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mabi=elfv2
endif
cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mlittle-endian
cflags-$(CONFIG_CPU_BIG_ENDIAN) += $(call cc-option,-mbig-endian)
ifneq ($(cc-name),clang)
cflags-$(CONFIG_CPU_LITTLE_ENDIAN) += -mno-strict-align
endif
@ -113,7 +120,9 @@ ifeq ($(CONFIG_CPU_LITTLE_ENDIAN),y)
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2,$(call cc-option,-mcall-aixdesc))
AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv2)
else
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcall-aixdesc)
AFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mabi=elfv1)
endif
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mcmodel=medium,$(call cc-option,-mminimal-toc))
CFLAGS-$(CONFIG_PPC64) += $(call cc-option,-mno-pointers-to-nested-functions)

2
arch/powerpc/include/asm/checksum.h
View File

@ -112,7 +112,7 @@ static inline __wsum csum_add(__wsum csum, __wsum addend)
#ifdef __powerpc64__
res += (__force u64)addend;
return (__force __wsum)((u32)res + (res >> 32));
return (__force __wsum) from64to32(res);
#else
asm("addc %0,%0,%1;"
"addze %0,%0;"

4
arch/powerpc/include/asm/cpuidle.h
View File

@ -70,8 +70,8 @@ static inline void report_invalid_psscr_val(u64 psscr_val, int err)
std r0,0(r1); \
ptesync; \
ld r0,0(r1); \
1: cmpd cr0,r0,r0; \
bne 1b; \
236: cmpd cr0,r0,r0; \
bne 236b; \
IDLE_INST; \
#define IDLE_STATE_ENTER_SEQ_NORET(IDLE_INST) \

4
arch/powerpc/include/asm/elf.h
View File

@ -144,8 +144,8 @@ extern int arch_setup_additional_pages(struct linux_binprm *bprm,
#define ARCH_DLINFO_CACHE_GEOMETRY \
NEW_AUX_ENT(AT_L1I_CACHESIZE, ppc64_caches.l1i.size); \
NEW_AUX_ENT(AT_L1I_CACHEGEOMETRY, get_cache_geometry(l1i)); \
NEW_AUX_ENT(AT_L1D_CACHESIZE, ppc64_caches.l1i.size); \
NEW_AUX_ENT(AT_L1D_CACHEGEOMETRY, get_cache_geometry(l1i)); \
NEW_AUX_ENT(AT_L1D_CACHESIZE, ppc64_caches.l1d.size); \
NEW_AUX_ENT(AT_L1D_CACHEGEOMETRY, get_cache_geometry(l1d)); \
NEW_AUX_ENT(AT_L2_CACHESIZE, ppc64_caches.l2.size); \
NEW_AUX_ENT(AT_L2_CACHEGEOMETRY, get_cache_geometry(l2)); \
NEW_AUX_ENT(AT_L3_CACHESIZE, ppc64_caches.l3.size); \

2
arch/powerpc/include/asm/nohash/pgtable.h
View File

@ -230,7 +230,7 @@ static inline int hugepd_ok(hugepd_t hpd)
return ((hpd_val(hpd) & 0x4) != 0);
#else
/* We clear the top bit to indicate hugepd */
return ((hpd_val(hpd) & PD_HUGE) == 0);
return (hpd_val(hpd) && (hpd_val(hpd) & PD_HUGE) == 0);
#endif
}

7
arch/powerpc/include/asm/ppc-opcode.h
View File

@ -284,6 +284,13 @@
#define PPC_INST_BRANCH_COND 0x40800000
#define PPC_INST_LBZCIX 0x7c0006aa
#define PPC_INST_STBCIX 0x7c0007aa
#define PPC_INST_LWZX 0x7c00002e
#define PPC_INST_LFSX 0x7c00042e
#define PPC_INST_STFSX 0x7c00052e
#define PPC_INST_LFDX 0x7c0004ae
#define PPC_INST_STFDX 0x7c0005ae
#define PPC_INST_LVX 0x7c0000ce
#define PPC_INST_STVX 0x7c0001ce
/* macros to insert fields into opcodes */
#define ___PPC_RA(a) (((a) & 0x1f) << 16)

18
arch/powerpc/include/asm/prom.h
View File

@ -160,12 +160,18 @@ struct of_drconf_cell {
#define OV5_PFO_HW_ENCR 0x1120 /* PFO Encryption Accelerator */
#define OV5_SUB_PROCESSORS 0x1501 /* 1,2,or 4 Sub-Processors supported */
#define OV5_XIVE_EXPLOIT 0x1701 /* XIVE exploitation supported */
#define OV5_MMU_RADIX_300 0x1880 /* ISA v3.00 radix MMU supported */
#define OV5_MMU_HASH_300 0x1840 /* ISA v3.00 hash MMU supported */
#define OV5_MMU_SEGM_RADIX 0x1820 /* radix mode (no segmentation) */
#define OV5_MMU_PROC_TBL 0x1810 /* hcall selects SLB or proc table */
#define OV5_MMU_SLB 0x1800 /* always use SLB */
#define OV5_MMU_GTSE 0x1808 /* Guest translation shootdown */
/* MMU Base Architecture */
#define OV5_MMU_SUPPORT 0x18C0 /* MMU Mode Support Mask */
#define OV5_MMU_HASH 0x1800 /* Hash MMU Only */
#define OV5_MMU_RADIX 0x1840 /* Radix MMU Only */
#define OV5_MMU_EITHER 0x1880 /* Hash or Radix Supported */
#define OV5_MMU_DYNAMIC 0x18C0 /* Hash or Radix Can Switch Later */
#define OV5_NMMU 0x1820 /* Nest MMU Available */
/* Hash Table Extensions */
#define OV5_HASH_SEG_TBL 0x1980 /* In Memory Segment Tables Available */
#define OV5_HASH_GTSE 0x1940 /* Guest Translation Shoot Down Avail */
/* Radix Table Extensions */
#define OV5_RADIX_GTSE 0x1A40 /* Guest Translation Shoot Down Avail */
/* Option Vector 6: IBM PAPR hints */
#define OV6_LINUX 0x02 /* Linux is our OS */

10
arch/powerpc/kernel/idle_book3s.S
View File

@ -276,19 +276,21 @@ power_enter_stop:
*/
andis. r4,r3,PSSCR_EC_ESL_MASK_SHIFTED
clrldi r3,r3,60 /* r3 = Bits[60:63] = Requested Level (RL) */
bne 1f
bne .Lhandle_esl_ec_set
IDLE_STATE_ENTER_SEQ(PPC_STOP)
li r3,0 /* Since we didn't lose state, return 0 */
b pnv_wakeup_noloss
.Lhandle_esl_ec_set:
/*
* Check if the requested state is a deep idle state.
*/
1: LOAD_REG_ADDRBASE(r5,pnv_first_deep_stop_state)
LOAD_REG_ADDRBASE(r5,pnv_first_deep_stop_state)
ld r4,ADDROFF(pnv_first_deep_stop_state)(r5)
cmpd r3,r4
bge 2f
bge .Lhandle_deep_stop
IDLE_STATE_ENTER_SEQ_NORET(PPC_STOP)
2:
.Lhandle_deep_stop:
/*
* Entering deep idle state.
* Clear thread bit in PACA_CORE_IDLE_STATE, save SPRs to

120
arch/powerpc/kernel/prom_init.c
View File

@ -168,6 +168,14 @@ static unsigned long __initdata prom_tce_alloc_start;
static unsigned long __initdata prom_tce_alloc_end;
#endif
static bool __initdata prom_radix_disable;
struct platform_support {
bool hash_mmu;
bool radix_mmu;
bool radix_gtse;
};
/* Platforms codes are now obsolete in the kernel. Now only used within this
* file and ultimately gone too. Feel free to change them if you need, they
* are not shared with anything outside of this file anymore
@ -626,6 +634,12 @@ static void __init early_cmdline_parse(void)
prom_memory_limit = ALIGN(prom_memory_limit, 0x1000000);
#endif
}
opt = strstr(prom_cmd_line, "disable_radix");
if (opt) {
prom_debug("Radix disabled from cmdline\n");
prom_radix_disable = true;
}
}
#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
@ -695,6 +709,8 @@ struct option_vector5 {
u8 byte22;
u8 intarch;
u8 mmu;
u8 hash_ext;
u8 radix_ext;
} __packed;
struct option_vector6 {
@ -850,8 +866,9 @@ struct ibm_arch_vec __cacheline_aligned ibm_architecture_vec = {
.reserved3 = 0,
.subprocessors = 1,
.intarch = 0,
.mmu = OV5_FEAT(OV5_MMU_RADIX_300) | OV5_FEAT(OV5_MMU_HASH_300) |
OV5_FEAT(OV5_MMU_PROC_TBL) | OV5_FEAT(OV5_MMU_GTSE),
.mmu = 0,
.hash_ext = 0,
.radix_ext = 0,
},
/* option vector 6: IBM PAPR hints */
@ -990,6 +1007,92 @@ static int __init prom_count_smt_threads(void)
}
static void __init prom_parse_mmu_model(u8 val,
struct platform_support *support)
{
switch (val) {
case OV5_FEAT(OV5_MMU_DYNAMIC):
case OV5_FEAT(OV5_MMU_EITHER): /* Either Available */
prom_debug("MMU - either supported\n");
support->radix_mmu = !prom_radix_disable;
support->hash_mmu = true;
break;
case OV5_FEAT(OV5_MMU_RADIX): /* Only Radix */
prom_debug("MMU - radix only\n");
if (prom_radix_disable) {
/*
* If we __have__ to do radix, we're better off ignoring
* the command line rather than not booting.
*/
prom_printf("WARNING: Ignoring cmdline option disable_radix\n");
}
support->radix_mmu = true;
break;
case OV5_FEAT(OV5_MMU_HASH):
prom_debug("MMU - hash only\n");
support->hash_mmu = true;
break;
default:
prom_debug("Unknown mmu support option: 0x%x\n", val);
break;
}
}
static void __init prom_parse_platform_support(u8 index, u8 val,
struct platform_support *support)
{
switch (index) {
case OV5_INDX(OV5_MMU_SUPPORT): /* MMU Model */
prom_parse_mmu_model(val & OV5_FEAT(OV5_MMU_SUPPORT), support);
break;
case OV5_INDX(OV5_RADIX_GTSE): /* Radix Extensions */
if (val & OV5_FEAT(OV5_RADIX_GTSE)) {
prom_debug("Radix - GTSE supported\n");
support->radix_gtse = true;
}
break;
}
}
static void __init prom_check_platform_support(void)
{
struct platform_support supported = {
.hash_mmu = false,
.radix_mmu = false,
.radix_gtse = false
};
int prop_len = prom_getproplen(prom.chosen,
"ibm,arch-vec-5-platform-support");
if (prop_len > 1) {
int i;
u8 vec[prop_len];
prom_debug("Found ibm,arch-vec-5-platform-support, len: %d\n",
prop_len);
prom_getprop(prom.chosen, "ibm,arch-vec-5-platform-support",
&vec, sizeof(vec));
for (i = 0; i < prop_len; i += 2) {
prom_debug("%d: index = 0x%x val = 0x%x\n", i / 2
, vec[i]
, vec[i + 1]);
prom_parse_platform_support(vec[i], vec[i + 1],
&supported);
}
}
if (supported.radix_mmu && supported.radix_gtse) {
/* Radix preferred - but we require GTSE for now */
prom_debug("Asking for radix with GTSE\n");
ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_RADIX);
ibm_architecture_vec.vec5.radix_ext = OV5_FEAT(OV5_RADIX_GTSE);
} else if (supported.hash_mmu) {
/* Default to hash mmu (if we can) */
prom_debug("Asking for hash\n");
ibm_architecture_vec.vec5.mmu = OV5_FEAT(OV5_MMU_HASH);
} else {
/* We're probably on a legacy hypervisor */
prom_debug("Assuming legacy hash support\n");
}
}
static void __init prom_send_capabilities(void)
{
@ -997,6 +1100,9 @@ static void __init prom_send_capabilities(void)
prom_arg_t ret;
u32 cores;
/* Check ibm,arch-vec-5-platform-support and fixup vec5 if required */
prom_check_platform_support();
root = call_prom("open", 1, 1, ADDR("/"));
if (root != 0) {
/* We need to tell the FW about the number of cores we support.
@ -2993,6 +3099,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
*/
prom_check_initrd(r3, r4);
/*
* Do early parsing of command line
*/
early_cmdline_parse();
#if defined(CONFIG_PPC_PSERIES) || defined(CONFIG_PPC_POWERNV)
/*
* On pSeries, inform the firmware about our capabilities
@ -3008,11 +3119,6 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4,
if (of_platform != PLATFORM_POWERMAC)
copy_and_flush(0, kbase, 0x100, 0);
/*
* Do early parsing of command line
*/
early_cmdline_parse();
/*
* Initialize memory management within prom_init
*/

3
arch/powerpc/kernel/setup_64.c
View File

@ -408,7 +408,10 @@ static void init_cache_info(struct ppc_cache_info *info, u32 size, u32 lsize,
info->line_size = lsize;
info->block_size = bsize;
info->log_block_size = __ilog2(bsize);
if (bsize)
info->blocks_per_page = PAGE_SIZE / bsize;
else
info->blocks_per_page = 0;
if (sets == 0)
info->assoc = 0xffff;

1
arch/powerpc/lib/Makefile
View File

@ -20,6 +20,7 @@ obj64-y += copypage_64.o copyuser_64.o usercopy_64.o mem_64.o hweight_64.o \
obj64-$(CONFIG_SMP) += locks.o
obj64-$(CONFIG_ALTIVEC) += vmx-helper.o
obj64-$(CONFIG_KPROBES_SANITY_TEST) += test_emulate_step.o
obj-y += checksum_$(BITS).o checksum_wrappers.o

20
arch/powerpc/lib/sstep.c
View File

@ -1799,8 +1799,6 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
goto instr_done;
case LARX:
if (regs->msr & MSR_LE)
return 0;
if (op.ea & (size - 1))
break; /* can't handle misaligned */
if (!address_ok(regs, op.ea, size))
@ -1823,8 +1821,6 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
goto ldst_done;
case STCX:
if (regs->msr & MSR_LE)
return 0;
if (op.ea & (size - 1))
break; /* can't handle misaligned */
if (!address_ok(regs, op.ea, size))
@ -1849,8 +1845,6 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
goto ldst_done;
case LOAD:
if (regs->msr & MSR_LE)
return 0;
err = read_mem(&regs->gpr[op.reg], op.ea, size, regs);
if (!err) {
if (op.type & SIGNEXT)
@ -1862,8 +1856,6 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
#ifdef CONFIG_PPC_FPU
case LOAD_FP:
if (regs->msr & MSR_LE)
return 0;
if (size == 4)
err = do_fp_load(op.reg, do_lfs, op.ea, size, regs);
else
@ -1872,15 +1864,11 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
#endif
#ifdef CONFIG_ALTIVEC
case LOAD_VMX:
if (regs->msr & MSR_LE)
return 0;
err = do_vec_load(op.reg, do_lvx, op.ea & ~0xfUL, regs);
goto ldst_done;
#endif
#ifdef CONFIG_VSX
case LOAD_VSX:
if (regs->msr & MSR_LE)
return 0;
err = do_vsx_load(op.reg, do_lxvd2x, op.ea, regs);
goto ldst_done;
#endif
@ -1903,8 +1891,6 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
goto instr_done;
case STORE:
if (regs->msr & MSR_LE)
return 0;
if ((op.type & UPDATE) && size == sizeof(long) &&
op.reg == 1 && op.update_reg == 1 &&
!(regs->msr & MSR_PR) &&
@ -1917,8 +1903,6 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
#ifdef CONFIG_PPC_FPU
case STORE_FP:
if (regs->msr & MSR_LE)
return 0;
if (size == 4)
err = do_fp_store(op.reg, do_stfs, op.ea, size, regs);
else
@ -1927,15 +1911,11 @@ int __kprobes emulate_step(struct pt_regs *regs, unsigned int instr)
#endif
#ifdef CONFIG_ALTIVEC
case STORE_VMX:
if (regs->msr & MSR_LE)
return 0;
err = do_vec_store(op.reg, do_stvx, op.ea & ~0xfUL, regs);
goto ldst_done;
#endif
#ifdef CONFIG_VSX
case STORE_VSX:
if (regs->msr & MSR_LE)
return 0;
err = do_vsx_store(op.reg, do_stxvd2x, op.ea, regs);
goto ldst_done;
#endif

434
arch/powerpc/lib/test_emulate_step.c Normal file
View File

@ -0,0 +1,434 @@
/*
* Simple sanity test for emulate_step load/store instructions.
*
* Copyright IBM Corp. 2016
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#define pr_fmt(fmt) "emulate_step_test: " fmt
#include <linux/ptrace.h>
#include <asm/sstep.h>
#include <asm/ppc-opcode.h>
#define IMM_L(i) ((uintptr_t)(i) & 0xffff)
/*
* Defined with TEST_ prefix so it does not conflict with other
* definitions.
*/
#define TEST_LD(r, base, i) (PPC_INST_LD | ___PPC_RT(r) | \
___PPC_RA(base) | IMM_L(i))
#define TEST_LWZ(r, base, i) (PPC_INST_LWZ | ___PPC_RT(r) | \
___PPC_RA(base) | IMM_L(i))
#define TEST_LWZX(t, a, b) (PPC_INST_LWZX | ___PPC_RT(t) | \
___PPC_RA(a) | ___PPC_RB(b))
#define TEST_STD(r, base, i) (PPC_INST_STD | ___PPC_RS(r) | \
___PPC_RA(base) | ((i) & 0xfffc))
#define TEST_LDARX(t, a, b, eh) (PPC_INST_LDARX | ___PPC_RT(t) | \
___PPC_RA(a) | ___PPC_RB(b) | \
__PPC_EH(eh))
#define TEST_STDCX(s, a, b) (PPC_INST_STDCX | ___PPC_RS(s) | \
___PPC_RA(a) | ___PPC_RB(b))
#define TEST_LFSX(t, a, b) (PPC_INST_LFSX | ___PPC_RT(t) | \
___PPC_RA(a) | ___PPC_RB(b))
#define TEST_STFSX(s, a, b) (PPC_INST_STFSX | ___PPC_RS(s) | \
___PPC_RA(a) | ___PPC_RB(b))
#define TEST_LFDX(t, a, b) (PPC_INST_LFDX | ___PPC_RT(t) | \
___PPC_RA(a) | ___PPC_RB(b))
#define TEST_STFDX(s, a, b) (PPC_INST_STFDX | ___PPC_RS(s) | \
___PPC_RA(a) | ___PPC_RB(b))
#define TEST_LVX(t, a, b) (PPC_INST_LVX | ___PPC_RT(t) | \
___PPC_RA(a) | ___PPC_RB(b))
#define TEST_STVX(s, a, b) (PPC_INST_STVX | ___PPC_RS(s) | \
___PPC_RA(a) | ___PPC_RB(b))
#define TEST_LXVD2X(s, a, b) (PPC_INST_LXVD2X | VSX_XX1((s), R##a, R##b))
#define TEST_STXVD2X(s, a, b) (PPC_INST_STXVD2X | VSX_XX1((s), R##a, R##b))
static void __init init_pt_regs(struct pt_regs *regs)
{
static unsigned long msr;
static bool msr_cached;
memset(regs, 0, sizeof(struct pt_regs));
if (likely(msr_cached)) {
regs->msr = msr;
return;
}
asm volatile("mfmsr %0" : "=r"(regs->msr));
regs->msr |= MSR_FP;
regs->msr |= MSR_VEC;
regs->msr |= MSR_VSX;
msr = regs->msr;
msr_cached = true;
}
static void __init show_result(char *ins, char *result)
{
pr_info("%-14s : %s\n", ins, result);
}
static void __init test_ld(void)
{
struct pt_regs regs;
unsigned long a = 0x23;
int stepped = -1;
init_pt_regs(&regs);
regs.gpr[3] = (unsigned long) &a;
/* ld r5, 0(r3) */
stepped = emulate_step(&regs, TEST_LD(5, 3, 0));
if (stepped == 1 && regs.gpr[5] == a)
show_result("ld", "PASS");
else
show_result("ld", "FAIL");
}
static void __init test_lwz(void)
{
struct pt_regs regs;
unsigned int a = 0x4545;
int stepped = -1;
init_pt_regs(&regs);
regs.gpr[3] = (unsigned long) &a;
/* lwz r5, 0(r3) */
stepped = emulate_step(&regs, TEST_LWZ(5, 3, 0));
if (stepped == 1 && regs.gpr[5] == a)
show_result("lwz", "PASS");
else
show_result("lwz", "FAIL");
}
static void __init test_lwzx(void)
{
struct pt_regs regs;
unsigned int a[3] = {0x0, 0x0, 0x1234};
int stepped = -1;
init_pt_regs(&regs);
regs.gpr[3] = (unsigned long) a;
regs.gpr[4] = 8;
regs.gpr[5] = 0x8765;
/* lwzx r5, r3, r4 */
stepped = emulate_step(&regs, TEST_LWZX(5, 3, 4));
if (stepped == 1 && regs.gpr[5] == a[2])
show_result("lwzx", "PASS");
else
show_result("lwzx", "FAIL");
}
static void __init test_std(void)
{
struct pt_regs regs;
unsigned long a = 0x1234;
int stepped = -1;
init_pt_regs(&regs);
regs.gpr[3] = (unsigned long) &a;
regs.gpr[5] = 0x5678;
/* std r5, 0(r3) */
stepped = emulate_step(&regs, TEST_STD(5, 3, 0));
if (stepped == 1 || regs.gpr[5] == a)
show_result("std", "PASS");
else
show_result("std", "FAIL");
}
static void __init test_ldarx_stdcx(void)
{
struct pt_regs regs;
unsigned long a = 0x1234;
int stepped = -1;
unsigned long cr0_eq = 0x1 << 29; /* eq bit of CR0 */
init_pt_regs(&regs);
asm volatile("mfcr %0" : "=r"(regs.ccr));
/*** ldarx ***/
regs.gpr[3] = (unsigned long) &a;
regs.gpr[4] = 0;
regs.gpr[5] = 0x5678;
/* ldarx r5, r3, r4, 0 */
stepped = emulate_step(&regs, TEST_LDARX(5, 3, 4, 0));
/*
* Don't touch 'a' here. Touching 'a' can do Load/store
* of 'a' which result in failure of subsequent stdcx.
* Instead, use hardcoded value for comparison.
*/
if (stepped <= 0 || regs.gpr[5] != 0x1234) {
show_result("ldarx / stdcx.", "FAIL (ldarx)");
return;
}
/*** stdcx. ***/
regs.gpr[5] = 0x9ABC;
/* stdcx. r5, r3, r4 */
stepped = emulate_step(&regs, TEST_STDCX(5, 3, 4));
/*
* Two possible scenarios that indicates successful emulation
* of stdcx. :
* 1. Reservation is active and store is performed. In this
* case cr0.eq bit will be set to 1.
* 2. Reservation is not active and store is not performed.
* In this case cr0.eq bit will be set to 0.
*/
if (stepped == 1 && ((regs.gpr[5] == a && (regs.ccr & cr0_eq))
|| (regs.gpr[5] != a && !(regs.ccr & cr0_eq))))
show_result("ldarx / stdcx.", "PASS");
else
show_result("ldarx / stdcx.", "FAIL (stdcx.)");
}
#ifdef CONFIG_PPC_FPU
static void __init test_lfsx_stfsx(void)
{
struct pt_regs regs;
union {
float a;
int b;
} c;
int cached_b;
int stepped = -1;
init_pt_regs(&regs);
/*** lfsx ***/
c.a = 123.45;
cached_b = c.b;
regs.gpr[3] = (unsigned long) &c.a;
regs.gpr[4] = 0;
/* lfsx frt10, r3, r4 */
stepped = emulate_step(&regs, TEST_LFSX(10, 3, 4));
if (stepped == 1)
show_result("lfsx", "PASS");
else
show_result("lfsx", "FAIL");
/*** stfsx ***/
c.a = 678.91;
/* stfsx frs10, r3, r4 */
stepped = emulate_step(&regs, TEST_STFSX(10, 3, 4));
if (stepped == 1 && c.b == cached_b)
show_result("stfsx", "PASS");
else
show_result("stfsx", "FAIL");
}
static void __init test_lfdx_stfdx(void)
{
struct pt_regs regs;
union {
double a;
long b;
} c;
long cached_b;
int stepped = -1;
init_pt_regs(&regs);
/*** lfdx ***/
c.a = 123456.78;
cached_b = c.b;
regs.gpr[3] = (unsigned long) &c.a;
regs.gpr[4] = 0;
/* lfdx frt10, r3, r4 */
stepped = emulate_step(&regs, TEST_LFDX(10, 3, 4));
if (stepped == 1)
show_result("lfdx", "PASS");
else
show_result("lfdx", "FAIL");
/*** stfdx ***/
c.a = 987654.32;
/* stfdx frs10, r3, r4 */
stepped = emulate_step(&regs, TEST_STFDX(10, 3, 4));
if (stepped == 1 && c.b == cached_b)
show_result("stfdx", "PASS");
else
show_result("stfdx", "FAIL");
}
#else
static void __init test_lfsx_stfsx(void)
{
show_result("lfsx", "SKIP (CONFIG_PPC_FPU is not set)");
show_result("stfsx", "SKIP (CONFIG_PPC_FPU is not set)");
}
static void __init test_lfdx_stfdx(void)
{
show_result("lfdx", "SKIP (CONFIG_PPC_FPU is not set)");
show_result("stfdx", "SKIP (CONFIG_PPC_FPU is not set)");
}
#endif /* CONFIG_PPC_FPU */
#ifdef CONFIG_ALTIVEC
static void __init test_lvx_stvx(void)
{
struct pt_regs regs;
union {
vector128 a;
u32 b[4];
} c;
u32 cached_b[4];
int stepped = -1;
init_pt_regs(&regs);
/*** lvx ***/
cached_b[0] = c.b[0] = 923745;
cached_b[1] = c.b[1] = 2139478;
cached_b[2] = c.b[2] = 9012;
cached_b[3] = c.b[3] = 982134;
regs.gpr[3] = (unsigned long) &c.a;
regs.gpr[4] = 0;
/* lvx vrt10, r3, r4 */
stepped = emulate_step(&regs, TEST_LVX(10, 3, 4));
if (stepped == 1)
show_result("lvx", "PASS");
else
show_result("lvx", "FAIL");
/*** stvx ***/
c.b[0] = 4987513;
c.b[1] = 84313948;
c.b[2] = 71;
c.b[3] = 498532;
/* stvx vrs10, r3, r4 */
stepped = emulate_step(&regs, TEST_STVX(10, 3, 4));
if (stepped == 1 && cached_b[0] == c.b[0] && cached_b[1] == c.b[1] &&
cached_b[2] == c.b[2] && cached_b[3] == c.b[3])
show_result("stvx", "PASS");
else
show_result("stvx", "FAIL");
}
#else
static void __init test_lvx_stvx(void)
{
show_result("lvx", "SKIP (CONFIG_ALTIVEC is not set)");
show_result("stvx", "SKIP (CONFIG_ALTIVEC is not set)");
}
#endif /* CONFIG_ALTIVEC */
#ifdef CONFIG_VSX
static void __init test_lxvd2x_stxvd2x(void)
{
struct pt_regs regs;
union {
vector128 a;
u32 b[4];
} c;
u32 cached_b[4];
int stepped = -1;
init_pt_regs(&regs);
/*** lxvd2x ***/
cached_b[0] = c.b[0] = 18233;
cached_b[1] = c.b[1] = 34863571;
cached_b[2] = c.b[2] = 834;
cached_b[3] = c.b[3] = 6138911;
regs.gpr[3] = (unsigned long) &c.a;
regs.gpr[4] = 0;
/* lxvd2x vsr39, r3, r4 */
stepped = emulate_step(&regs, TEST_LXVD2X(39, 3, 4));
if (stepped == 1)
show_result("lxvd2x", "PASS");
else
show_result("lxvd2x", "FAIL");
/*** stxvd2x ***/
c.b[0] = 21379463;
c.b[1] = 87;
c.b[2] = 374234;
c.b[3] = 4;
/* stxvd2x vsr39, r3, r4 */
stepped = emulate_step(&regs, TEST_STXVD2X(39, 3, 4));
if (stepped == 1 && cached_b[0] == c.b[0] && cached_b[1] == c.b[1] &&
cached_b[2] == c.b[2] && cached_b[3] == c.b[3])
show_result("stxvd2x", "PASS");
else
show_result("stxvd2x", "FAIL");
}
#else
static void __init test_lxvd2x_stxvd2x(void)
{
show_result("lxvd2x", "SKIP (CONFIG_VSX is not set)");
show_result("stxvd2x", "SKIP (CONFIG_VSX is not set)");
}
#endif /* CONFIG_VSX */
static int __init test_emulate_step(void)
{
test_ld();
test_lwz();
test_lwzx();
test_std();
test_ldarx_stdcx();
test_lfsx_stfsx();
test_lfdx_stfdx();
test_lvx_stvx();
test_lxvd2x_stxvd2x();
return 0;
}
late_initcall(test_emulate_step);

42
arch/powerpc/mm/init_64.c
View File

@ -356,18 +356,42 @@ static void early_check_vec5(void)
unsigned long root, chosen;
int size;
const u8 *vec5;
u8 mmu_supported;
root = of_get_flat_dt_root();
chosen = of_get_flat_dt_subnode_by_name(root, "chosen");
if (chosen == -FDT_ERR_NOTFOUND)
return;
vec5 = of_get_flat_dt_prop(chosen, "ibm,architecture-vec-5", &size);
if (!vec5)
return;
if (size <= OV5_INDX(OV5_MMU_RADIX_300) ||
!(vec5[OV5_INDX(OV5_MMU_RADIX_300)] & OV5_FEAT(OV5_MMU_RADIX_300)))
/* Hypervisor doesn't support radix */
if (chosen == -FDT_ERR_NOTFOUND) {
cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX;
return;
}
vec5 = of_get_flat_dt_prop(chosen, "ibm,architecture-vec-5", &size);
if (!vec5) {
cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX;
return;
}
if (size <= OV5_INDX(OV5_MMU_SUPPORT)) {
cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX;
return;
}
/* Check for supported configuration */
mmu_supported = vec5[OV5_INDX(OV5_MMU_SUPPORT)] &
OV5_FEAT(OV5_MMU_SUPPORT);
if (mmu_supported == OV5_FEAT(OV5_MMU_RADIX)) {
/* Hypervisor only supports radix - check enabled && GTSE */
if (!early_radix_enabled()) {
pr_warn("WARNING: Ignoring cmdline option disable_radix\n");
}
if (!(vec5[OV5_INDX(OV5_RADIX_GTSE)] &
OV5_FEAT(OV5_RADIX_GTSE))) {
pr_warn("WARNING: Hypervisor doesn't support RADIX with GTSE\n");
}
/* Do radix anyway - the hypervisor said we had to */
cur_cpu_spec->mmu_features |= MMU_FTR_TYPE_RADIX;
} else if (mmu_supported == OV5_FEAT(OV5_MMU_HASH)) {
/* Hypervisor only supports hash - disable radix */
cur_cpu_spec->mmu_features &= ~MMU_FTR_TYPE_RADIX;
}
}
void __init mmu_early_init_devtree(void)
@ -383,7 +407,7 @@ void __init mmu_early_init_devtree(void)
* even though the ibm,architecture-vec-5 property created by
* skiboot doesn't have the necessary bits set.
*/
if (early_radix_enabled() && !(mfmsr() & MSR_HV))
if (!(mfmsr() & MSR_HV))
early_check_vec5();
if (early_radix_enabled())

4
arch/powerpc/mm/pgtable-radix.c
View File

@ -186,6 +186,10 @@ static void __init radix_init_pgtable(void)
*/
register_process_table(__pa(process_tb), 0, PRTB_SIZE_SHIFT - 12);
pr_info("Process table %p and radix root for kernel: %p\n", process_tb, init_mm.pgd);
asm volatile("ptesync" : : : "memory");
asm volatile(PPC_TLBIE_5(%0,%1,2,1,1) : :
"r" (TLBIEL_INVAL_SET_LPID), "r" (0));
asm volatile("eieio; tlbsync; ptesync" : : : "memory");
}
static void __init radix_init_partition_table(void)

4
arch/powerpc/platforms/powernv/opal-wrappers.S
View File

@ -39,8 +39,8 @@ opal_tracepoint_refcount:
BEGIN_FTR_SECTION; \
b 1f; \
END_FTR_SECTION(0, 1); \
ld r12,opal_tracepoint_refcount@toc(r2); \
cmpdi r12,0; \
ld r11,opal_tracepoint_refcount@toc(r2); \
cmpdi r11,0; \
bne- LABEL; \
1:

10
arch/powerpc/sysdev/xics/icp-opal.c
View File

@ -91,6 +91,16 @@ static unsigned int icp_opal_get_irq(void)
static void icp_opal_set_cpu_priority(unsigned char cppr)
{
/*
* Here be dragons. The caller has asked to allow only IPI's and not
* external interrupts. But OPAL XIVE doesn't support that. So instead
* of allowing no interrupts allow all. That's still not right, but
* currently the only caller who does this is xics_migrate_irqs_away()
* and it works in that case.
*/
if (cppr >= DEFAULT_PRIORITY)
cppr = LOWEST_PRIORITY;
xics_set_base_cppr(cppr);
opal_int_set_cppr(cppr);
iosync();

17
arch/powerpc/sysdev/xics/xics-common.c
View File

@ -20,6 +20,7 @@
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/delay.h>
#include <asm/prom.h>
#include <asm/io.h>
@ -198,9 +199,6 @@ void xics_migrate_irqs_away(void)
/* Remove ourselves from the global interrupt queue */
xics_set_cpu_giq(xics_default_distrib_server, 0);
/* Allow IPIs again... */
icp_ops->set_priority(DEFAULT_PRIORITY);
for_each_irq_desc(virq, desc) {
struct irq_chip *chip;
long server;
@ -255,6 +253,19 @@ void xics_migrate_irqs_away(void)
unlock:
raw_spin_unlock_irqrestore(&desc->lock, flags);
}
/* Allow "sufficient" time to drop any inflight IRQ's */
mdelay(5);
/*
* Allow IPIs again. This is done at the very end, after migrating all
* interrupts, the expectation is that we'll only get woken up by an IPI
* interrupt beyond this point, but leave externals masked just to be
* safe. If we're using icp-opal this may actually allow all
* interrupts anyway, but that should be OK.
*/
icp_ops->set_priority(DEFAULT_PRIORITY);
}
#endif /* CONFIG_HOTPLUG_CPU */

6
tools/testing/selftests/powerpc/harness.c
View File

@ -114,9 +114,11 @@ int test_harness(int (test_function)(void), char *name)
rc = run_test(test_function, name);
if (rc == MAGIC_SKIP_RETURN_VALUE)
if (rc == MAGIC_SKIP_RETURN_VALUE) {
test_skip(name);
else
/* so that skipped test is not marked as failed */
rc = 0;
} else
test_finish(name, rc);
return rc;