Commit Graph

30197 Commits

Author SHA1 Message Date
Sam Ravnborg f54c88cb6c sparc: remove NO_PROC_ID - it is no longer used
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:33:54 -08:00
Sam Ravnborg 65579f3cfb sparc: drop get_tbr() in traps.h
get_tbr() has no users in the whole tree -drop it.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:33:05 -08:00
Sam Ravnborg 220483fec0 sparc: fix warning in userspace header traps.h
Fix following warning:
traps.h:23: extern's make no sense in userspace

Add an ifdef __KERNEL__ block that cover the
extern definition and a few related things that neither
is for userspace.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:32:34 -08:00
Sam Ravnborg fffeeb4137 sparc: fix warnings in userspace header byteorder.h
Fix following warnings in byteorder.h:

byteorder.h:4: include of <linux/types.h> is preferred over <asm/types.h>
byteorder.h:9: leaks CONFIG_SPARC32 to userspace where it is not valid
byteorder.h:13: leaks CONFIG_SPARC64 to userspace where it is not valid
byteorder.h:14: found __[us]{8,16,32,64} type without #include <linux/types.h>
byteorder.h:47: leaks CONFIG_SPARC64 to userspace where it is not valid

- changed to use include <linux/types.h> as suggested
- use preprocessor defined symbols to distingush between 32 and 64 bit

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:31:58 -08:00
Sam Ravnborg 2ef4c01e18 sparc: fix warning in userspace header jsflash.h
Fix following warnings in jsflash.h:

jsflash.h:11: include of <linux/types.h> is preferred over <asm/types.h>
jsflash.h:24: found __[us]{8,16,32,64} type without #include <linux/types.h>

Fixed by changing the include to <linux/types.h>

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:31:13 -08:00
Sam Ravnborg 7c59d28d0e sparc: unify openprom.h
After the preparational steps the unification was simple.

The linux_prom_pci_registers definition did not look like
it could be unified at first look since the structure is assigned
using prop_getproperty() / of_get_property() so the structure
is assumed to come direct form the prom.

The LINUX_OPPROM_MAGIC was kept even if it is not used by the kernel
on the assumption that userspace may require it.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:15:25 -08:00
Sam Ravnborg 640cc590bd sparc64: delete unused linux_prom64_ranges from openprom_64.h
It was not used over the whole tree - so drop it.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:14:35 -08:00
Sam Ravnborg bb5b52bbd5 sparc: prepare openprom for unification
Align the sparc and sparc64 versions so differences are minimal.
A few data types are changed to better reflect there actual usage.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:13:52 -08:00
Sam Ravnborg b608c3fe3c sparc: remove linux_prom_pci_assigned_addresses from openprom_32.h
It is not used anywhere in the tree so drop it.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:12:40 -08:00
Sam Ravnborg 3011618d9a sparc: remove ebus definitions from openprom*.h
Looks like leftovers from the removal of the special ebus layer.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:10:48 -08:00
Sam Ravnborg 1eae29bcc2 sparc: unify siginfo.h
Trivial unification where the sparc64 specific
parts are protected using a signle ifdef/endif pair.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 21:10:04 -08:00
Rusty Russell 0999769e6c cris: define __fls
Like fls, but can't be handed 0 and returns the bit number.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-01-03 15:37:14 +10:30
Sam Ravnborg f3ec38d513 sparc: unify ptrace.h
The two ptrace.h implementations are very alike but
the small differences required two set of ifdef/else/endif pairs.

The definition of reg_window32 could have been shared but
that would have required several updates in sparc32 code as
all printk formatting for example assume it is longs.

sparc_stackf looked like anohter candidate to share if the 32
bit was renamed to sparc_stackf32.
But it contains two pointers in the sparc32 version which would
have been 64 bit in the sparc64 version so it was non-trivial.
Using a set of accessor macros could do the trick if pursued later.

The sparc64 specific definitions are not protected by
ifdef - as it should not be required to do so.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:42:12 -08:00
Sam Ravnborg bd703d88a2 sparc: unify sigcontext.h
With the renamed types in place the unification was straightforward.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:34:46 -08:00
Sam Ravnborg 4d7b92ad57 sparc: add '32' suffix to reg_window, sigcontext, __siginfo_t
Renaming a few types to contain a 32 suffix makes the
type names compatible with sparc64 and thus makes sharing
between the two a lot easier.

Note: None of these definitions are expected part of the
stable ABI towards userspace.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:32:59 -08:00
Sam Ravnborg ece93487c3 sparc: unify signal.h
They were almost identical and with the preapration
patch nothing was needed to be added.

The unified version contains a few sparc64 only definitions
but they are kept as is and not protected by ifdef/endif.
The unified version exports a bit more to userspace then the
32 bit version did.
This is not considered fatal.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:21:06 -08:00
Sam Ravnborg 55d646feee sparc64: prepare signal_64 for unification
o add a sparc32 only definition
o fix a few style issues (white space errors etc).
o include compiler.h (for __user)

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:17:47 -08:00
David S. Miller a0381a9480 sparc: Kill bogus comment about IRQF_SHARED in pci_psycho.c
Noticed by Geert Uytterhoeven.

Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 19:12:46 -08:00
Sam Ravnborg 12aa0b1732 sparc: unify stat.h
To my suprise struct stat64 was not equal on sparc 32 and sparc64,
so there was really nothing to share here.
Unify the files by adding their respective content to stat.h.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 18:48:21 -08:00
Sam Ravnborg 085219f79c sparc32: use proper types in struct stat
Like sparc64 use proper types in struct stat

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 18:47:34 -08:00
Sam Ravnborg 104e28059d sparc32: drop __old_kernel_stat
sparc32 does not define __ARCH_WANT_OLD_STAT so
we do not use this structure neither do we support it.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 18:39:10 -08:00
Sam Ravnborg a508228a9e sparc: unify posix_types.h
The posix types differed so much in their definition
that they are kept in separate blocks.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 18:35:29 -08:00
Sam Ravnborg a66963a966 sparc: delete unused config symbols
There is no need to define a config symbol if
it is never set to any value. Undefined symbols equal
to 'n'.

GENERIC_GPIO looks like it is similar but
it is set using select in some other file so
it must be kept.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-02 18:14:04 -08:00
Linus Torvalds 56635f7e61 Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild-next:
  kbuild: ignore a few files in headers_check
  kbuild: add checks for include of linux/types in userspace headers
  kbuild: drop debugging leftover in tags.sh
  kbuild: document environment variables
  kbuild: make *config usage docs
  kbuild: disable sparse warning "returning void-valued expression"
  kbuild: in headers_install autoconvert asm/inline/volatile to __xxx__
  kbuild: check for leaked CONFIG_ symbols to userspace
  headers_check.pl: disallow extern's
  kconfig: improve error messages for bad source statements
  kconfig: struct property commented
  kconfig: add comments to symbol flags
  kconfig: explain symbol value defaults
  m68k: fix recursive dependency in Kconfig
2009-01-02 15:56:54 -08:00
Ingo Molnar 47dabdc7fc Merge branches 'x86/cleanups', 'x86/fpu' and 'x86/urgent' into x86/core 2009-01-02 22:41:52 +01:00
Ingo Molnar 923a789b49 Merge branch 'linus' into x86/cleanups
Conflicts:
	arch/x86/kernel/reboot.c
2009-01-02 22:41:36 +01:00
Roland Dreier 79ff56ebd3 swiotlb: add missing __init annotations
Impact: cleanup, reduce kernel size a bit

The current kernel build warns:

    WARNING: vmlinux.o(.text+0x11458): Section mismatch in reference from the function swiotlb_alloc_boot() to the function .init.text:__alloc_bootmem_low()
    The function swiotlb_alloc_boot() references
    the function __init __alloc_bootmem_low().
    This is often because swiotlb_alloc_boot lacks a __init
    annotation or the annotation of __alloc_bootmem_low is wrong.

    WARNING: vmlinux.o(.text+0x1011f2): Section mismatch in reference from the function swiotlb_late_init_with_default_size() to the function .init.text:__alloc_bootmem_low()
    The function swiotlb_late_init_with_default_size() references
    the function __init __alloc_bootmem_low().
    This is often because swiotlb_late_init_with_default_size lacks a __init
    annotation or the annotation of __alloc_bootmem_low is wrong.

and indeed the functions calling __alloc_bootmem_low() can be marked
__init as well.

Signed-off-by: Roland Dreier <rolandd@cisco.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-02 21:52:39 +01:00
Linus Torvalds b840d79631 Merge branch 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (66 commits)
  x86: export vector_used_by_percpu_irq
  x86: use logical apicid in x2apic_cluster's x2apic_cpu_mask_to_apicid_and()
  sched: nominate preferred wakeup cpu, fix
  x86: fix lguest used_vectors breakage, -v2
  x86: fix warning in arch/x86/kernel/io_apic.c
  sched: fix warning in kernel/sched.c
  sched: move test_sd_parent() to an SMP section of sched.h
  sched: add SD_BALANCE_NEWIDLE at MC and CPU level for sched_mc>0
  sched: activate active load balancing in new idle cpus
  sched: bias task wakeups to preferred semi-idle packages
  sched: nominate preferred wakeup cpu
  sched: favour lower logical cpu number for sched_mc balance
  sched: framework for sched_mc/smt_power_savings=N
  sched: convert BALANCE_FOR_xx_POWER to inline functions
  x86: use possible_cpus=NUM to extend the possible cpus allowed
  x86: fix cpu_mask_to_apicid_and to include cpu_online_mask
  x86: update io_apic.c to the new cpumask code
  x86: Introduce topology_core_cpumask()/topology_thread_cpumask()
  x86: xen: use smp_call_function_many()
  x86: use work_on_cpu in x86/kernel/cpu/mcheck/mce_amd_64.c
  ...

Fixed up trivial conflict in kernel/time/tick-sched.c manually
2009-01-02 11:44:09 -08:00
Sam Ravnborg cfb2a494bb m68k: fix recursive dependency in Kconfig
We had a recursive dependency between MMU_MOTOROLA and MMU_SUN3
Fix it by dropping the unused dependencies on MMU_MOTOROLA.

MMU_MOTOROLA is set to y only using select so any dependencies
are anyway ignored.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
2009-01-02 20:43:20 +01:00
Linus Torvalds 597b0d2162 Merge branch 'kvm-updates/2.6.29' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm
* 'kvm-updates/2.6.29' of git://git.kernel.org/pub/scm/linux/kernel/git/avi/kvm: (140 commits)
  KVM: MMU: handle large host sptes on invlpg/resync
  KVM: Add locking to virtual i8259 interrupt controller
  KVM: MMU: Don't treat a global pte as such if cr4.pge is cleared
  MAINTAINERS: Maintainership changes for kvm/ia64
  KVM: ia64: Fix kvm_arch_vcpu_ioctl_[gs]et_regs()
  KVM: x86: Rework user space NMI injection as KVM_CAP_USER_NMI
  KVM: VMX: Fix pending NMI-vs.-IRQ race for user space irqchip
  KVM: fix handling of ACK from shared guest IRQ
  KVM: MMU: check for present pdptr shadow page in walk_shadow
  KVM: Consolidate userspace memory capability reporting into common code
  KVM: Advertise the bug in memory region destruction as fixed
  KVM: use cpumask_var_t for cpus_hardware_enabled
  KVM: use modern cpumask primitives, no cpumask_t on stack
  KVM: Extract core of kvm_flush_remote_tlbs/kvm_reload_remote_mmus
  KVM: set owner of cpu and vm file operations
  anon_inodes: use fops->owner for module refcount
  x86: KVM guest: kvm_get_tsc_khz: return khz, not lpj
  KVM: MMU: prepopulate the shadow on invlpg
  KVM: MMU: skip global pgtables on sync due to cr3 switch
  KVM: MMU: collapse remote TLB flushes on root sync
  ...
2009-01-02 11:41:11 -08:00
Ingo Brueckl e8e3232627 Fix compiler warning in arch/x86/mm/init_32.c
Signed-off-by: Ingo Brueckl <ib@wupperonline.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-02 10:27:32 -08:00
Jaswinder Singh Rajput 103ceffb95 x86: mpparse.c fix style problems
Impact: cleanup, fix style problems, more readable

Fixes style problems:

 WARNING: Use #include <linux/smp.h> instead of <asm/smp.h>
 WARNING: Use #include <linux/acpi.h> instead of <asm/acpi.h>
 WARNING: suspect code indent for conditional statements (8, 17)
 WARNING: space prohibited between function name and open parenthesis '('

total: 0 errors, 5 warnings

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-02 19:24:28 +01:00
Jaswinder Singh Rajput dceb4521c8 x86: nmi.c fix style problems
Impact: cleanup, fix style problems

Fixes style problems:

 WARNING: Use #include <linux/smp.h> instead of <asm/smp.h>
 WARNING: Use #include <linux/nmi.h> instead of <asm/nmi.h>

total: 0 errors, 2 warnings

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-02 19:03:38 +01:00
Jaswinder Singh Rajput 423a54058f x86: ldt.c fix style problems
Impact: cleanup

Fixes style problems:

 WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h>
 ERROR: space required before the open parenthesis '('

total: 1 errors, 1 warnings

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-02 17:46:24 +01:00
Jaswinder Singh Rajput f634fa9411 x86: cpuid.c fix style problems
Impact: cleanup

Fixes style problems:

 WARNING: Use #include <linux/uaccess.h> instead of <asm/uaccess.h>
 ERROR: "foo * bar" should be "foo *bar"
 ERROR: trailing whitespace
 WARNING: usage of NR_CPUS is often wrong - consider using cpu_possible(), num_possible_cpus(), for_each_possible_cpu(), etc

total: 2 errors, 2 warnings

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-02 17:46:23 +01:00
Cliff Wickman 46814dded1 x86, UV: remove erroneous BAU initialization
Impact: fix crash on x86/UV

UV is the SGI "UltraViolet" machine, which is x86_64 based.
BAU is the "Broadcast Assist Unit", used for TLB shootdown in UV.

This patch removes the allocation and initialization of an unused table.

This table is left over from a development test mode.  It is unused in
the present code.

And it was incorrectly initialized: 8 entries allocated but 17 initialized,
causing slab corruption.

This patch should go into 2.6.27 and 2.6.28 as well as the current tree.

Diffed against 2.6.28 (linux-next, 12/30/08)

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-02 17:26:25 +01:00
Ravikiran G Thirumalai 26799a6311 x86: fix incorrect __read_mostly on _boot_cpu_pda
The pda rework (commit 3461b0af02)
to remove static boot cpu pdas introduced a performance bug.

_boot_cpu_pda is the actual pda used by the boot cpu and is definitely
not "__read_mostly" and ended up polluting the read mostly section with
writes.  This bug caused regression of about 8-10% on certain syscall
intensive workloads.

Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Acked-by: Mike Travis <travis@sgi.com>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-02 17:16:29 +01:00
Ingo Brueckl a9067d5376 x86: convert permanent_kmaps_init() from macro to inline
Impact: cleanup

This compiler warning:

  arch/x86/mm/init_32.c:515: warning: unused variable 'pgd_base'

triggers because permanent_kmaps_init() is a CPP macro in the
!CONFIG_HIGHMEM case, that does not tell the compiler that the
'pgd_base' parameter is used.

Convert permanent_kmaps_init() (and set_highmem_pages_init()) to
C inline functions - which gives the parameter a proper type and
which gets rid of the compiler warning as well.

Signed-off-by: Ingo Brueckl <ib@wupperonline.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-02 15:41:03 +01:00
Cyrill Gorcunov c64d8996bd x86: early_printk - use sizeof instead of hardcoded number
Impact: cleanup

Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-02 10:27:46 +01:00
Linus Torvalds b58602a4ba Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (34 commits)
  nfsd race fixes: jfs
  nfsd race fixes: reiserfs
  nfsd race fixes: ext4
  nfsd race fixes: ext3
  nfsd race fixes: ext2
  nfsd/create race fixes, infrastructure
  filesystem notification: create fs/notify to contain all fs notification
  fs/block_dev.c: __read_mostly improvement and sb_is_blkdev_sb utilization
  kill ->dir_notify()
  filp_cachep can be static in fs/file_table.c
  fix f_count description in Documentation/filesystems/files.txt
  make INIT_FS use the __RW_LOCK_UNLOCKED initialization
  take init_fs to saner place
  kill vfs_permission
  pass a struct path * to may_open
  kill walk_init_root
  remove incorrect comment in inode_permission
  expand some comments (d_path / seq_path)
  correct wrong function name of d_put in kernel document and source comment
  fix switch_names() breakage in short-to-short case
  ...
2008-12-31 15:57:56 -08:00
Rusty Russell d036e67b40 cpumask: convert kernel/irq
Impact: Reduce stack usage, use new cpumask API.  ALPHA mod!

Main change is that irq_default_affinity becomes a cpumask_var_t, so
treat it as a pointer (this effects alpha).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-01-01 10:12:26 +10:30
Rusty Russell 333af15341 cpumask: Introduce topology_core_cpumask()/topology_thread_cpumask(): ia64
Impact: New API

The old topology_core_siblings() and topology_thread_siblings() return
a cpumask_t; these new ones return a (const) struct cpumask *.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
2009-01-01 10:12:21 +10:30
Rusty Russell 9150641dd1 cpumask: Introduce topology_core_cpumask()/topology_thread_cpumask(): powerpc
Impact: New API

The old topology_core_siblings() and topology_thread_siblings() return
a cpumask_t; these new ones return a (const) struct cpumask *.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
2009-01-01 10:12:21 +10:30
Rusty Russell 2bb23a63f2 cpumask: Introduce topology_core_cpumask()/topology_thread_cpumask(): s390
Impact: New API

The old topology_core_siblings() and topology_thread_siblings() return
a cpumask_t; these new ones return a (const) struct cpumask *.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
2009-01-01 10:12:20 +10:30
Rusty Russell 78fd744f82 cpumask: Introduce topology_core_cpumask()/topology_thread_cpumask(): sparc
Impact: New API

The old topology_core_siblings() and topology_thread_siblings() return
a cpumask_t; these new ones return a (const) struct cpumask *.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
2009-01-01 10:12:20 +10:30
Rusty Russell 0db5d3d2f5 m68knommu: define __fls
Like fls, but can't be handed 0 and returns the bit number.

(I broke this arch in linux-next by using __fls in generic code).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-01-01 10:12:18 +10:30
Rusty Russell ccec25ff69 blackfin: define __fls
Like fls, but can't be handed 0 and returns the bit number.

(I broke this arch in linux-next by using __fls in generic code).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Mike Frysinger <vapier@gentoo.org>
2009-01-01 10:12:17 +10:30
Rusty Russell 96b8d4c19d avr32: define __fls
Like fls, but can't be handed 0 and returns the bit number.

(I broke this arch in linux-next by using __fls in generic code).

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-01-01 10:12:16 +10:30
Rusty Russell 165ac433fa parisc: remove gratuitous cpu_online_map declaration.
This is defined in linux/cpumask.h (included in this file already),
and this is now defined differently.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Cc: linux-parisc@vger.kernel.org
2009-01-01 10:12:16 +10:30
Rusty Russell 9e2f913df7 percpu: fix percpu accessors to potentially !cpu_possible() cpus: m32r
Impact: CPU iterator bugfixes

Percpu areas are only allocated for possible cpus.  In general, you
shouldn't access random cpu's percpu areas.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Hirokazu Takata <takata@linux-m32r.org>
2009-01-01 10:12:14 +10:30
Rusty Russell f320786063 cpumask: Remove IA64 definition of total_cpus now it's in core code
Impact: fix IA64 compile

Fortunately, they have exactly the same semantics.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2009-01-01 10:12:13 +10:30
Al Viro 18d8fda7c3 take init_fs to saner place
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-12-31 18:07:42 -05:00
Nick Piggin c2452f3278 shrink struct dentry
struct dentry is one of the most critical structures in the kernel. So it's
sad to see it going neglected.

With CONFIG_PROFILING turned on (which is probably the common case at least
for distros and kernel developers), sizeof(struct dcache) == 208 here
(64-bit). This gives 19 objects per slab.

I packed d_mounted into a hole, and took another 4 bytes off the inline
name length to take the padding out from the end of the structure. This
shinks it to 200 bytes. I could have gone the other way and increased the
length to 40, but I'm aiming for a magic number, read on...

I then got rid of the d_cookie pointer. This shrinks it to 192 bytes. Rant:
why was this ever a good idea? The cookie system should increase its hash
size or use a tree or something if lookups are a problem. Also the "fast
dcookie lookups" in oprofile should be moved into the dcookie code -- how
can oprofile possibly care about the dcookie_mutex? It gets dropped after
get_dcookie() returns so it can't be providing any sort of protection.

At 192 bytes, 21 objects fit into a 4K page, saving about 3MB on my system
with ~140 000 entries allocated. 192 is also a multiple of 64, so we get
nice cacheline alignment on 64 and 32 byte line systems -- any given dentry
will now require 3 cachelines to touch all fields wheras previously it
would require 4.

I know the inline name size was chosen quite carefully, however with the
reduction in cacheline footprint, it should actually be just about as fast
to do a name lookup for a 36 character name as it was before the patch (and
faster for other sizes). The memory footprint savings for names which are
<= 32 or > 36 bytes long should more than make up for the memory cost for
33-36 byte names.

Performance is a feature...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2008-12-31 18:07:38 -05:00
Linus Torvalds db200df0b3 Merge branch 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  sparseirq: move __weak symbols into separate compilation unit
  sparseirq: work around __weak alias bug
  sparseirq: fix hang with !SPARSE_IRQ
  sparseirq: set lock_class for legacy irq when sparse_irq is selected
  sparseirq: work around compiler optimizing away __weak functions
  sparseirq: fix desc->lock init
  sparseirq: do not printk when migrating IRQ descriptors
  sparseirq: remove duplicated arch_early_irq_init()
  irq: simplify for_each_irq_desc() usage
  proc: remove ifdef CONFIG_SPARSE_IRQ from stat.c
  irq: for_each_irq_desc() move to irqnr.h
  hrtimer: remove #include <linux/irq.h>
2008-12-31 09:00:59 -08:00
Marcelo Tosatti 8791723920 KVM: MMU: handle large host sptes on invlpg/resync
The invlpg and sync walkers lack knowledge of large host sptes,
descending to non-existant pagetable level.

Stop at directory level in such case.

Fixes SMP Windows XP with hugepages.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:49 +02:00
Avi Kivity 3f353858c9 KVM: Add locking to virtual i8259 interrupt controller
While most accesses to the i8259 are with the kvm mutex taken, the call
to kvm_pic_read_irq() is not.  We can't easily take the kvm mutex there
since the function is called with interrupts disabled.

Fix by adding a spinlock to the virtual interrupt controller.  Since we
can't send an IPI under the spinlock (we also take the same spinlock in
an irq disabled context), we defer the IPI until the spinlock is released.
Similarly, we defer irq ack notifications until after spinlock release to
avoid lock recursion.

Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:48 +02:00
Avi Kivity 25e2343246 KVM: MMU: Don't treat a global pte as such if cr4.pge is cleared
The pte.g bit is meaningless if global pages are disabled; deferring
mmu page synchronization on these ptes will lead to the guest using stale
shadow ptes.

Fixes Vista x86 smp bootloader failure.

Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:48 +02:00
Jes Sorensen 042b26edf0 KVM: ia64: Fix kvm_arch_vcpu_ioctl_[gs]et_regs()
Fix kvm_arch_vcpu_ioctl_[gs]et_regs() to do something meaningful on
ia64. Old versions could never have worked since they required
pointers to be set in the ioctl payload which were never being set by
the ioctl handler for get_regs.

In addition reserve extra space for future extensions.

The change of layout of struct kvm_regs doesn't require adding a new
CAP since get/set regs never worked on ia64 until now.

This version doesn't support copying the KVM kernel stack in/out of
the kernel. This should be implemented in a seperate ioctl call if
ever needed.

Signed-off-by: Jes Sorensen <jes@sgi.com>
Acked-by : Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:47 +02:00
Jan Kiszka 4531220b71 KVM: x86: Rework user space NMI injection as KVM_CAP_USER_NMI
There is no point in doing the ready_for_nmi_injection/
request_nmi_window dance with user space. First, we don't do this for
in-kernel irqchip anyway, while the code path is the same as for user
space irqchip mode. And second, there is nothing to loose if a pending
NMI is overwritten by another one (in contrast to IRQs where we have to
save the number). Actually, there is even the risk of raising spurious
NMIs this way because the reason for the held-back NMI might already be
handled while processing the first one.

Therefore this patch creates a simplified user space NMI injection
interface, exporting it under KVM_CAP_USER_NMI and dropping the old
KVM_CAP_NMI capability. And this time we also take care to provide the
interface only on archs supporting NMIs via KVM (right now only x86).

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:47 +02:00
Jan Kiszka 264ff01d55 KVM: VMX: Fix pending NMI-vs.-IRQ race for user space irqchip
As with the kernel irqchip, don't allow an NMI to stomp over an already
injected IRQ; instead wait for the IRQ injection to be completed.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:47 +02:00
Marcelo Tosatti eb64f1e8cd KVM: MMU: check for present pdptr shadow page in walk_shadow
walk_shadow assumes the caller verified validity of the pdptr pointer in
question, which is not the case for the invlpg handler.

Fixes oops during Solaris 10 install.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:46 +02:00
Avi Kivity ca9edaee1a KVM: Consolidate userspace memory capability reporting into common code
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:46 +02:00
Eduardo Habkost e93353c93a x86: KVM guest: kvm_get_tsc_khz: return khz, not lpj
kvm_get_tsc_khz() currently returns the previously-calculated preset_lpj
value, but it is in loops-per-jiffy, not kHz. The current code works
correctly only when HZ=1000.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:44 +02:00
Marcelo Tosatti ad218f85e3 KVM: MMU: prepopulate the shadow on invlpg
If the guest executes invlpg, peek into the pagetable and attempt to
prepopulate the shadow entry.

Also stop dirty fault updates from interfering with the fork detector.

2% improvement on RHEL3/AIM7.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:44 +02:00
Marcelo Tosatti 6cffe8ca4a KVM: MMU: skip global pgtables on sync due to cr3 switch
Skip syncing global pages on cr3 switch (but not on cr4/cr0). This is
important for Linux 32-bit guests with PAE, where the kmap page is
marked as global.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:44 +02:00
Marcelo Tosatti b1a368218a KVM: MMU: collapse remote TLB flushes on root sync
Collapse remote TLB flushes on root sync.

kernbench is 2.7% faster on 4-way guest. Improvements have been seen
with other loads such as AIM7.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:43 +02:00
Marcelo Tosatti 60c8aec6e2 KVM: MMU: use page array in unsync walk
Instead of invoking the handler directly collect pages into
an array so the caller can work with it.

Simplifies TLB flush collapsing.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:43 +02:00
Amit Shah fbce554e94 KVM: x86 emulator: Fix handling of VMMCALL instruction
The VMMCALL instruction doesn't get recognised and isn't processed
by the emulator.

This is seen on an Intel host that tries to execute the VMMCALL
instruction after a guest live migrates from an AMD host.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:43 +02:00
Guillaume Thouvenin 9bf8ea42fe KVM: x86 emulator: add the emulation of shld and shrd instructions
Add emulation of shld and shrd instructions

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:43 +02:00
Guillaume Thouvenin d175226a5f KVM: x86 emulator: add the assembler code for three operands
Add the assembler code for instruction with three operands and one
operand is stored in ECX register

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:42 +02:00
Guillaume Thouvenin bfcadf83ec KVM: x86 emulator: add a new "implied 1" Src decode type
Add SrcOne operand type when we need to decode an implied '1' like with
regular shift instruction

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:42 +02:00
Guillaume Thouvenin 0dc8d10f7d KVM: x86 emulator: add Src2 decode set
Instruction like shld has three operands, so we need to add a Src2
decode set. We start with Src2None, Src2CL, and Src2ImmByte, Src2One to
support shld/shrd and we will expand it later.

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:42 +02:00
Guillaume Thouvenin 45ed60b371 KVM: x86 emulator: Extend the opcode descriptor
Extend the opcode descriptor to 32 bits. This is needed by the
introduction of a new Src2 operand type.

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:41 +02:00
Hollis Blanchard 7b7015914b KVM: ppc: mostly cosmetic updates to the exit timing accounting code
The only significant changes were to kvmppc_exit_timing_write() and
kvmppc_exit_timing_show(), both of which were dramatically simplified.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:41 +02:00
Hollis Blanchard 73e75b416f KVM: ppc: Implement in-kernel exit timing statistics
Existing KVM statistics are either just counters (kvm_stat) reported for
KVM generally or trace based aproaches like kvm_trace.
For KVM on powerpc we had the need to track the timings of the different exit
types. While this could be achieved parsing data created with a kvm_trace
extension this adds too much overhead (at least on embedded PowerPC) slowing
down the workloads we wanted to measure.

Therefore this patch adds a in-kernel exit timing statistic to the powerpc kvm
code. These statistic is available per vm&vcpu under the kvm debugfs directory.
As this statistic is low, but still some overhead it can be enabled via a
.config entry and should be off by default.

Since this patch touched all powerpc kvm_stat code anyway this code is now
merged and simplified together with the exit timing statistic code (still
working with exit timing disabled in .config).

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:41 +02:00
Hollis Blanchard c5fbdffbda KVM: ppc: save and restore guest mappings on context switch
Store shadow TLB entries in memory, but only use it on host context switch
(instead of every guest entry). This improves performance for most workloads on
440 by reducing the guest TLB miss rate.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:09 +02:00
Hollis Blanchard 7924bd4109 KVM: ppc: directly insert shadow mappings into the hardware TLB
Formerly, we used to maintain a per-vcpu shadow TLB and on every entry to the
guest would load this array into the hardware TLB. This consumed 1280 bytes of
memory (64 entries of 16 bytes plus a struct page pointer each), and also
required some assembly to loop over the array on every entry.

Instead of saving a copy in memory, we can just store shadow mappings directly
into the hardware TLB, accepting that the host kernel will clobber these as
part of the normal 440 TLB round robin. When we do that we need less than half
the memory, and we have decreased the exit handling time for all guest exits,
at the cost of increased number of TLB misses because the host overwrites some
guest entries.

These savings will be increased on processors with larger TLBs or which
implement intelligent flush instructions like tlbivax (which will avoid the
need to walk arrays in software).

In addition to that and to the code simplification, we have a greater chance of
leaving other host userspace mappings in the TLB, instead of forcing all
subsequent tasks to re-fault all their mappings.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:09 +02:00
Hollis Blanchard c0ca609c5f powerpc/44x: declare tlb_44x_index for use in C code
KVM currently ignores the host's round robin TLB eviction selection, instead
maintaining its own TLB state and its own round robin index. However, by
participating in the normal 44x TLB selection, we can drop the alternate TLB
processing in KVM. This results in a significant performance improvement,
since that processing currently must be done on *every* guest exit.

Accordingly, KVM needs to be able to access and increment tlb_44x_index.
(KVM on 440 cannot be a module, so there is no need to export this symbol.)

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:09 +02:00
Hollis Blanchard 891686188f KVM: ppc: support large host pages
KVM on 440 has always been able to handle large guest mappings with 4K host
pages -- we must, since the guest kernel uses 256MB mappings.

This patch makes KVM work when the host has large pages too (tested with 64K).

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:07 +02:00
Hannes Eder efff9e538f KVM: VMX: fix sparse warning
Impact: make global function static

  arch/x86/kvm/vmx.c:134:3: warning: symbol 'vmx_capability' was not declared. Should it be static?

Signed-off-by: Hannes Eder <hannes@hanneseder.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:06 +02:00
Avi Kivity f3fd92fbdb KVM: Remove extraneous semicolon after do/while
Notices by Guillaume Thouvenin.

Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:05 +02:00
Avi Kivity 2b48cc75b2 KVM: x86 emulator: fix popf emulation
Set operand type and size to get correct writeback behavior.

Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:05 +02:00
Avi Kivity cf5de4f886 KVM: x86 emulator: fix ret emulation
'ret' did not set the operand type or size for the destination, so
writeback ignored it.

Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:05 +02:00
Avi Kivity 8a09b6877f KVM: x86 emulator: switch 'pop reg' instruction to emulate_pop()
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:04 +02:00
Avi Kivity 781d0edc5f KVM: x86 emulator: allow pop from mmio
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:04 +02:00
Avi Kivity faa5a3ae39 KVM: x86 emulator: Extract 'pop' sequence into a function
Switch 'pop r/m' instruction to use the new function.

Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:04 +02:00
Christian Borntraeger 6692cef30b KVM: s390: Fix memory leak of vcpu->run
The s390 backend of kvm never calls kvm_vcpu_uninit. This causes
a memory leak of vcpu->run pages.
Lets call kvm_vcpu_uninit in kvm_arch_vcpu_destroy to free
the vcpu->run.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:03 +02:00
Christian Borntraeger d329c035e7 KVM: s390: Fix refcounting and allow module unload
Currently it is impossible to unload the kvm module on s390.
This patch fixes kvm_arch_destroy_vm to release all cpus.
This make it possible to unload the module.

In addition we stop messing with the module refcount in arch code.

Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:03 +02:00
Avi Kivity 6b7ad61ffb KVM: x86 emulator: consolidate emulation of two operand instructions
No need to repeat the same assembly block over and over.

Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:03 +02:00
Avi Kivity dda96d8f1b KVM: x86 emulator: reduce duplication in one operand emulation thunks
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:03 +02:00
Marcelo Tosatti ecc5589f19 KVM: MMU: optimize set_spte for page sync
The write protect verification in set_spte is unnecessary for page sync.

Its guaranteed that, if the unsync spte was writable, the target page
does not have a write protected shadow (if it had, the spte would have
been write protected under mmu_lock by rmap_write_protect before).

Same reasoning applies to mark_page_dirty: the gfn has been marked as
dirty via the pagefault path.

The cost of hash table and memslot lookups are quite significant if the
workload is pagetable write intensive resulting in increased mmu_lock
contention.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:02 +02:00
Glauber Costa 423cd25a5a x86: KVM guest: sign kvmclock as paravirt
Currently, we only set the KVM paravirt signature in case
of CONFIG_KVM_GUEST. However, it is possible to have it turned
off, while CONFIG_KVM_CLOCK is turned on. This is also a paravirt
case, and should be shown accordingly.

Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:00 +02:00
Avi Kivity df203ec9a7 KVM: VMX: Conditionally request interrupt window after injecting irq
If we're injecting an interrupt, and another one is pending, request
an interrupt window notification so we don't have excess latency on the
second interrupt.

This shouldn't happen in practice since an EOI will be issued, giving a second
chance to request an interrupt window, but...

Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:55:00 +02:00
Xiantao Zhang 8fe0736763 KVM: ia64: Clean up vmm_ivt.S using tab to indent every line
Using tab for indentation for vmm_ivt.S.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:54:59 +02:00
Xiantao Zhang 9f7d5bb5e2 KVM: ia64: Add handler for crashed vmm
Since vmm runs in an isolated address space and it is just a copy
of host's kvm-intel module, so once vmm crashes, we just crash all guests
running on it instead of crashing whole kernel.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:54:59 +02:00
Xiantao Zhang 5e2be19832 KVM: ia64: Add some debug points to provide crash infomation
Use printk infrastructure to print out some debug info once VM crashes.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:54:59 +02:00
Xiantao Zhang 7d63797815 KVM: ia64: Define printk function for kvm-intel module
kvm-intel module is relocated to an isolated address space
with kernel, so it can't call host kernel's printk for debug
purpose. In the module, we implement the printk to output debug
info of vmm.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:54:59 +02:00
Eduardo Habkost d176720d34 x86: disable VMX on all CPUs on reboot
On emergency_restart, we may need to use an NMI to disable virtualization
on all CPUs. We do that using nmi_shootdown_cpus() if VMX is enabled.

Note: With this patch, we will run the NMI stuff only when the CPU where
emergency_restart() was called has VMX enabled. This should work on most
cases because KVM enables VMX on all CPUs, but we may miss the small
window where KVM is doing that. Also, I don't know if all code using
VMX out there always enable VMX on all CPUs like KVM does. We have two
other alternatives for that:

a) Have an API that all code that enables VMX on any CPU should use
   to tell the kernel core that it is going to enable VMX on the CPUs.
b) Always call nmi_shootdown_cpus() if the CPU supports VMX. This is
   a bit intrusive and more risky, as it would run nmi_shootdown_cpus()
   on emergency_reboot() even on systems where virtualization is never
   enabled.

Finding a proper point to hook the nmi_shootdown_cpus() call isn't
trivial, as the non-emergency machine_restart() (that doesn't need the
NMI tricks) uses machine_emergency_restart() directly.

The solution to make this work without adding a new function or argument
to machine_ops was setting a 'reboot_emergency' flag that tells if
native_machine_emergency_restart() needs to do the virt cleanup or not.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:54:58 +02:00
Eduardo Habkost 2340b62f77 kdump: forcibly disable VMX and SVM on machine_crash_shutdown()
We need to disable virtualization extensions on all CPUs before booting
the kdump kernel, otherwise the kdump kernel booting will fail, and
rebooting after the kdump kernel did its task may also fail.

We do it using cpu_emergency_vmxoff() and cpu_emergency_svm_disable(),
that should always work, because those functions check if the CPUs
support SVM or VMX before doing their tasks.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:30 +02:00
Eduardo Habkost 0f3e9eeba0 x86: cpu_emergency_svm_disable() function
This function can be used by the reboot or kdump code to forcibly
disable SVM on the CPU.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:30 +02:00
Eduardo Habkost 2c8dceebb2 KVM: SVM: move svm_hardware_disable() code to asm/virtext.h
Create cpu_svm_disable() function.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:30 +02:00
Eduardo Habkost 63d1142f8f KVM: SVM: move has_svm() code to asm/virtext.h
Use a trick to keep the printk()s on has_svm() working as before. gcc
will take care of not generating code for the 'msg' stuff when the
function is called with a NULL msg argument.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:29 +02:00
Eduardo Habkost 6aa07a0d77 x86: cpu_emergency_vmxoff() function
Add cpu_emergency_vmxoff() and its friends: cpu_vmx_enabled() and
__cpu_emergency_vmxoff().

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:29 +02:00
Eduardo Habkost 710ff4a855 KVM: VMX: extract kvm_cpu_vmxoff() from hardware_disable()
Along with some comments on why it is different from the core cpu_vmxoff()
function.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:29 +02:00
Eduardo Habkost 1e9931146c x86: asm/virtext.h: add cpu_vmxoff() inline function
Unfortunately we can't use exactly the same code from vmx
hardware_disable(), because the KVM function uses the
__kvm_handle_fault_on_reboot() tricks.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:29 +02:00
Eduardo Habkost 6210e37b12 KVM: VMX: move cpu_has_kvm_support() to an inline on asm/virtext.h
It will be used by core code on kdump and reboot, to disable
vmx if needed.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:28 +02:00
Eduardo Habkost eca70fc567 KVM: VMX: move ASM_VMX_* definitions from asm/kvm_host.h to asm/vmx.h
Those definitions will be used by code outside KVM, so move it outside
of a KVM-specific source file.

Those definitions are used only on kvm/vmx.c, that already includes
asm/vmx.h, so they can be moved safely.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:28 +02:00
Eduardo Habkost c2cedf7be2 KVM: SVM: move svm.h to include/asm
svm.h will be used by core code that is independent of KVM, so I am
moving it outside the arch/x86/kvm directory.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:28 +02:00
Eduardo Habkost 13673a90f1 KVM: VMX: move vmx.h to include/asm
vmx.h will be used by core code that is independent of KVM, so I am
moving it outside the arch/x86/kvm directory.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:27 +02:00
Hollis Blanchard fe4e771d5c KVM: ppc: fix userspace mapping invalidation on context switch
We used to defer invalidating userspace TLB entries until jumping out of the
kernel. This was causing MMU weirdness most easily triggered by using a pipe in
the guest, e.g. "dmesg | tail". I believe the problem was that after the guest
kernel changed the PID (part of context switch), the old process's mappings
were still present, and so copy_to_user() on the "return to new process" path
ended up using stale mappings.

Testing with large pages (64K) exposed the problem, probably because with 4K
pages, pressure on the TLB faulted all process A's mappings out before the
guest kernel could insert any for process B.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:26 +02:00
Hollis Blanchard df9b856c45 KVM: ppc: use prefetchable mappings for guest memory
Bare metal Linux on 440 can "overmap" RAM in the kernel linear map, so that it
can use large (256MB) mappings even if memory isn't a multiple of 256MB. To
prevent the hardware prefetcher from loading from an invalid physical address
through that mapping, it's marked Guarded.

However, KVM must ensure that all guest mappings are backed by real physical
RAM (since a deliberate access through a guarded mapping could still cause a
machine check). Accordingly, we don't need to make our mappings guarded, so
let's allow prefetching as the designers intended.

Curiously this patch didn't affect performance at all on the quick test I
tried, but it's clearly the right thing to do anyways and may improve other
workloads.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:26 +02:00
Hollis Blanchard bf5d4025c9 KVM: ppc: use MMUCR accessor to obtain TID
We have an accessor; might as well use it.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:25 +02:00
Xiantao Zhang 30ed5bb685 KVM: ia64: Remove some macro definitions in asm-offsets.c.
Use kernel's corresponding macro instead.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:25 +02:00
Hollis Blanchard 74ef740da6 KVM: ppc: fix Kconfig constraints
Make sure that CONFIG_KVM cannot be selected without processor support
(currently, 440 is the only processor implementation available).

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:25 +02:00
Nitin A Kamble 0fdf8e59fa KVM: Fix cpuid iteration on multiple leaves per eac
The code to traverse the cpuid data array list for counting type of leaves is
currently broken.

This patches fixes the 2 things in it.

 1. Set the 1st counting entry's flag KVM_CPUID_FLAG_STATE_READ_NEXT. Without
    it the code will never find a valid entry.

 2. Also the stop condition in the for loop while looking for the next unflaged
    entry is broken. It needs to stop when it find one matching entry;
    and in the case of count of 1, it will be the same entry found in this
    iteration.

Signed-Off-By: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:24 +02:00
Nitin A Kamble 0853d2c1d8 KVM: Fix cpuid leaf 0xb loop termination
For cpuid leaf 0xb the bits 8-15 in ECX register define the end of counting
leaf.      The previous code was using bits 0-7 for this purpose, which is
a bug.

Signed-off-by: Nitin A Kamble <nitin.a.kamble@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:24 +02:00
Hollis Blanchard fcfdbd266a KVM: ppc: improve trap emulation
set ESR[PTR] when emulating a guest trap. This allows Linux guests to
properly handle WARN_ON() (i.e. detect that it's a non-fatal trap).

Also remove debugging printk in trap emulation.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:24 +02:00
Hollis Blanchard d4cf3892e5 KVM: ppc: optimize irq delivery path
In kvmppc_deliver_interrupt is just one case left in the switch and it is a
rare one (less than 8%) when looking at the exit numbers. Therefore we can
at least drop the switch/case and if an if. I inserted an unlikely too, but
that's open for discussion.

In kvmppc_can_deliver_interrupt all frequent cases are in the default case.
I know compilers are smart but we can make it easier for them. By writing
down all options and removing the default case combined with the fact that
ithe values are constants 0..15 should allow the compiler to write an easy
jump table.
Modifying kvmppc_can_deliver_interrupt pointed me to the fact that gcc seems
to be unable to reduce priority_exception[x] to a build time constant.
Therefore I changed the usage of the translation arrays in the interrupt
delivery path completely. It is now using priority without translation to irq
on the full irq delivery path.
To be able to do that ivpr regs are stored by their priority now.

Additionally the decision made in kvmppc_can_deliver_interrupt is already
sufficient to get the value of interrupt_msr_mask[x]. Therefore we can replace
the 16x4byte array used here with a single 4byte variable (might still be one
miss, but the chance to find this in cache should be better than the right
entry of the whole array).

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:23 +02:00
Hollis Blanchard 9ab80843c0 KVM: ppc: optimize find first bit
Since we use a unsigned long here anyway we can use the optimized __ffs.

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:23 +02:00
Hollis Blanchard 1b6766c7f3 KVM: ppc: optimize kvm stat handling
Currently we use an unnecessary if&switch to detect some cases.
To be honest we don't need the ligh_exits counter anyway, because we can
calculate it out of others. Sum_exits can also be calculated, so we can
remove that too.
MMIO, DCR  and INTR can be counted on other places without these
additional control structures (The INTR case was never hit anyway).

The handling of BOOKE_INTERRUPT_EXTERNAL/BOOKE_INTERRUPT_DECREMENTER is
similar, but we can avoid the additional if when copying 3 lines of code.
I thought about a goto there to prevent duplicate lines, but rewriting three
lines should be better style than a goto cross switch/case statements (its
also not enough code to justify a new inline function).

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:23 +02:00
Hollis Blanchard b8fd68ac8d KVM: ppc: fix set regs to take care of msr change
When changing some msr bits e.g. problem state we need to take special
care of that. We call the function in our mtmsr emulation (not needed for
wrtee[i]), but we don't call kvmppc_set_msr if we change msr via set_regs
ioctl.
It's a corner case we never hit so far, but I assume it should be
kvmppc_set_msr in our arch set regs function (I found it because it is also
a corner case when using pv support which would miss the update otherwise).

Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:23 +02:00
Hollis Blanchard 5cf8ca2214 KVM: ppc: adjust vcpu types to support 64-bit cores
However, some of these fields could be split into separate per-core structures
in the future.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:22 +02:00
Hollis Blanchard db93f5745d KVM: ppc: create struct kvm_vcpu_44x and introduce container_of() accessor
This patch doesn't yet move all 44x-specific data into the new structure, but
is the first step down that path. In the future we may also want to create a
struct kvm_vcpu_booke.

Based on patch from Liu Yu <yu.liu@freescale.com>.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:22 +02:00
Hollis Blanchard 5cbb5106f5 KVM: ppc: Move the last bits of 44x code out of booke.c
Needed to port to other Book E processors.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:22 +02:00
Hollis Blanchard 75f74f0dbe KVM: ppc: refactor instruction emulation into generic and core-specific pieces
Cores provide 3 emulation hooks, implemented for example in the new
4xx_emulate.c:
kvmppc_core_emulate_op
kvmppc_core_emulate_mtspr
kvmppc_core_emulate_mfspr

Strictly speaking the last two aren't necessary, but provide for more
informative error reporting ("unknown SPR").

Long term I'd like to have instruction decoding autogenerated from tables of
opcodes, and that way we could aggregate universal, Book E, and core-specific
instructions more easily and without redundant switch statements.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:21 +02:00
Hollis Blanchard c381a04313 ppc: Create disassemble.h to extract instruction fields
This is used in a couple places in KVM, but isn't KVM-specific.

However, this patch doesn't modify other in-kernel emulation code:
- xmon uses a direct copy of ppc_opc.c from binutils
- emulate_instruction() doesn't need it because it can use a series
  of mask tests.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:21 +02:00
Hollis Blanchard 9dd921cfea KVM: ppc: Refactor powerpc.c to relocate 440-specific code
This introduces a set of core-provided hooks. For 440, some of these are
implemented by booke.c, with the rest in (the new) 44x.c.

Note that these hooks are link-time, not run-time. Since it is not possible to
build a single kernel for both e500 and 440 (for example), using function
pointers would only add overhead.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:52:21 +02:00
Hollis Blanchard d9fbd03d24 KVM: ppc: combine booke_guest.c and booke_host.c
The division was somewhat artificial and cumbersome, and had no functional
benefit anyways: we can only guests built for the real host processor.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:50 +02:00
Hollis Blanchard 0f55dc481e KVM: ppc: Rename "struct tlbe" to "struct kvmppc_44x_tlbe"
This will ease ports to other cores.

Also remove unused "struct kvm_tlb" while we're at it.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:50 +02:00
Hollis Blanchard a0d7b9f246 KVM: ppc: Move 440-specific TLB code into 44x_tlb.c
This will make it easier to provide implementations for other cores.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:50 +02:00
Izik Eidus 2843099fee KVM: MMU: Fix aliased gfns treated as unaliased
Some areas of kvm x86 mmu are using gfn offset inside a slot without
unaliasing the gfn first.  This patch makes sure that the gfn will be
unaliased and add gfn_to_memslot_unaliased() to save the calculating
of the gfn unaliasing in case we have it unaliased already.

Signed-off-by: Izik Eidus <ieidus@redhat.com>
Acked-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:50 +02:00
Sheng Yang 6eb55818c0 KVM: Enable Function Level Reset for assigned device
Ideally, every assigned device should in a clear condition before and after
assignment, so that the former state of device won't affect later work.
Some devices provide a mechanism named Function Level Reset, which is
defined in PCI/PCI-e document. We should execute it before and after device
assignment.

(But sadly, the feature is new, and most device on the market now don't
support it. We are considering using D0/D3hot transmit to emulate it later,
but not that elegant and reliable as FLR itself.)

[Update: Reminded by Xiantao, execute FLR after we ensure that the device can
be assigned to the guest.]

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:49 +02:00
Xiantao Zhang 853dafb62b KVM: ia64: Remove lock held by halted vcpu
Remove the lock protection for kvm halt logic, otherwise,
once other vcpus want to acquire the lock, and they have to
wait all vcpus are waken up from halt.

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:49 +02:00
Xiantao Zhang a917f7af39 KVM: ia64: Re-organize data sturure of guests' data area
1. Increase the size of data area to 64M
2. Support more vcpus and memory, 128 vcpus and 256G memory are supported
   for guests.
3. Add the boundary check for memory and vcpu allocation.

With this patch, kvm guest's data area looks as follow:
  *
  *            +----------------------+  ------- KVM_VM_DATA_SIZE
  *            |     vcpu[n]'s data   |   |     ___________________KVM_STK_OFFSET
  *            |                      |   |    /                   |
  *            |        ..........    |   |   /vcpu's struct&stack |
  *            |        ..........    |   |  /---------------------|---- 0
  *            |     vcpu[5]'s data   |   | /       vpd            |
  *            |     vcpu[4]'s data   |   |/-----------------------|
  *            |     vcpu[3]'s data   |   /         vtlb           |
  *            |     vcpu[2]'s data   |  /|------------------------|
  *            |     vcpu[1]'s data   |/  |         vhpt           |
  *            |     vcpu[0]'s data   |____________________________|
  *            +----------------------+   |
  *            |    memory dirty log  |   |
  *            +----------------------+   |
  *            |    vm's data struct  |   |
  *            +----------------------+   |
  *            |                      |   |
  *            |                      |   |
  *            |                      |   |
  *            |                      |   |
  *            |                      |   |
  *            |                      |   |
  *            |                      |   |
  *            |   vm's p2m table  |      |
  *            |                      |   |
  *            |                      |   |
  *            |                      |   |  |
  * vm's data->|                      |   |  |
  *            +----------------------+ ------- 0
  * To support large memory, needs to increase the size of p2m.
  * To support more vcpus, needs to ensure it has enough space to
  * hold vcpus' data.
  */

Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:49 +02:00
Guillaume Thouvenin 1d5a4d9b92 KVM: VMX: Handle mmio emulation when guest state is invalid
If emulate_invalid_guest_state is enabled, the emulator is called
when guest state is invalid.  Until now, we reported an mmio failure
when emulate_instruction() returned EMULATE_DO_MMIO.  This patch adds
the case where emulate_instruction() failed and an MMIO emulation
is needed.

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:48 +02:00
Guillaume Thouvenin e93f36bcfa KVM: allow emulator to adjust rip for emulated pio instructions
If we call the emulator we shouldn't call skip_emulated_instruction()
in the first place, since the emulator already computes the next rip
for us. Thus we move ->skip_emulated_instruction() out of
kvm_emulate_pio() and into handle_io() (and the svm equivalent). We
also replaced "return 0" by "break" in the "do_io:" case because now
the shadow register state needs to be committed. Otherwise eip will never
be updated.

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:48 +02:00
Amit Shah c0d09828c8 KVM: SVM: Set the 'busy' flag of the TR selector
The busy flag of the TR selector is not set by the hardware. This breaks
migration from amd hosts to intel hosts.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:48 +02:00
Amit Shah 25022acc3d KVM: SVM: Set the 'g' bit of the cs selector for cross-vendor migration
The hardware does not set the 'g' bit of the cs selector and this breaks
migration from amd hosts to intel hosts. Set this bit if the segment
limit is beyond 1 MB.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:48 +02:00
Amit Shah b8222ad2e5 KVM: x86: Fix typo in function name
get_segment_descritptor_dtable() contains an obvious type.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:47 +02:00
Jan Kiszka cc6e462cd5 KVM: x86: Optimize NMI watchdog delivery
As suggested by Avi, this patch introduces a counter of VCPUs that have
LVT0 set to NMI mode. Only if the counter > 0, we push the PIT ticks via
all LAPIC LVT0 lines to enable NMI watchdog support.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:47 +02:00
Jan Kiszka 8fdb2351d5 KVM: x86: Fix and refactor NMI watchdog emulation
This patch refactors the NMI watchdog delivery patch, consolidating
tests and providing a proper API for delivering watchdog events.

An included micro-optimization is to check only for apic_hw_enabled in
kvm_apic_local_deliver (the test for LVT mask is covering the
soft-disabled case already).

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:46 +02:00
Guillaume Thouvenin 291fd39bfc KVM: x86 emulator: Add decode entries for 0x04 and 0x05 opcodes (add acc, imm)
Add decode entries for 0x04 and 0x05 (ADD) opcodes, execution is already
implemented.

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:46 +02:00
Sheng Yang 6fe639792c KVM: VMX: Move private memory slot position
PCI device assignment would map guest MMIO spaces as separate slot, so it is
possible that the device has more than 2 MMIO spaces and overwrite current
private memslot.

The patch move private memory slot to the top of userspace visible memory slots.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:46 +02:00
Sheng Yang 291f26bc0f KVM: MMU: Extend kvm_mmu_page->slot_bitmap size
Otherwise set_bit() for private memory slot(above KVM_MEMORY_SLOTS) would
corrupted memory in 32bit host.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:45 +02:00
Sheng Yang d73fa29a9b KVM: Clean up kvm_x86_emulate.h
Remove one left improper comment of removed CR2.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:45 +02:00
Sheng Yang 64d4d52175 KVM: Enable MTRR for EPT
The effective memory type of EPT is the mixture of MSR_IA32_CR_PAT and memory
type field of EPT entry.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:45 +02:00
Sheng Yang 74be52e3e6 KVM: Add local get_mtrr_type() to support MTRR
For EPT memory type support.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:45 +02:00
Sheng Yang 468d472f3f KVM: VMX: Add PAT support for EPT
GUEST_PAT support is a new feature introduced by Intel Core i7 architecture.
With this, cpu would save/load guest and host PAT automatically, for EPT memory
type in guest depends on MSR_IA32_CR_PAT.

Also add save/restore for MSR_IA32_CR_PAT.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:44 +02:00
Sheng Yang 0bed3b568b KVM: Improve MTRR structure
As well as reset mmu context when set MTRR.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:44 +02:00
Sheng Yang 932d27a791 x86: Export some definition of MTRR
For KVM can reuse the type define, and need them to support shadow MTRR.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:44 +02:00
Sheng Yang b558bc0a25 x86: Rename mtrr_state struct and macro names
Prepare for exporting them.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:44 +02:00
Gleb Natapov 5f179287fa KVM: call kvm_arch_vcpu_reset() instead of the kvm_x86_ops callback
Call kvm_arch_vcpu_reset() instead of directly using arch callback.
The function does additional things.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:43 +02:00
Jan Kiszka 3b86cd9967 KVM: VMX: work around lacking VNMI support
Older VMX supporting CPUs do not provide the "Virtual NMI" feature for
tracking the NMI-blocked state after injecting such events. For now
KVM is unable to inject NMIs on those CPUs.

Derived from Sheng Yang's suggestion to use the IRQ window notification
for detecting the end of NMI handlers, this patch implements virtual
NMI support without impact on the host's ability to receive real NMIs.
The downside is that the given approach requires some heuristics that
can cause NMI nesting in vary rare corner cases.

The approach works as follows:
 - inject NMI and set a software-based NMI-blocked flag
 - arm the IRQ window start notification whenever an NMI window is
   requested
 - if the guest exits due to an opening IRQ window, clear the emulated
   NMI-blocked flag
 - if the guest net execution time with NMI-blocked but without an IRQ
   window exceeds 1 second, force NMI-blocked reset and inject anyway

This approach covers most practical scenarios:
 - succeeding NMIs are seperated by at least one open IRQ window
 - the guest may spin with IRQs disabled (e.g. due to a bug), but
   leaving the NMI handler takes much less time than one second
 - the guest does not rely on strict ordering or timing of NMIs
   (would be problematic in virtualized environments anyway)

Successfully tested with the 'nmi n' monitor command, the kgdbts
testsuite on smp guests (additional patches required to add debug
register support to kvm) + the kernel's nmi_watchdog=1, and a Siemens-
specific board emulation (+ guest) that comes with its own NMI
watchdog mechanism.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:43 +02:00
Jan Kiszka 487b391d6e KVM: VMX: Provide support for user space injected NMIs
This patch adds the required bits to the VMX side for user space
injected NMIs. As with the preexisting in-kernel irqchip support, the
CPU must provide the "virtual NMI" feature for proper tracking of the
NMI blocking state.

Based on the original patch by Sheng Yang.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:43 +02:00
Jan Kiszka c4abb7c9cd KVM: x86: Support for user space injected NMIs
Introduces the KVM_NMI IOCTL to the generic x86 part of KVM for
injecting NMIs from user space and also extends the statistic report
accordingly.

Based on the original patch by Sheng Yang.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:42 +02:00
Jan Kiszka 26df99c6c5 KVM: Kick NMI receiving VCPU
Kick the NMI receiving VCPU in case the triggering caller runs in a
different context.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:42 +02:00
Jan Kiszka 0496fbb973 KVM: x86: VCPU with pending NMI is runnabled
Ensure that a VCPU with pending NMIs is considered runnable.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:42 +02:00
Jan Kiszka 23930f9521 KVM: x86: Enable NMI Watchdog via in-kernel PIT source
LINT0 of the LAPIC can be used to route PIT events as NMI watchdog ticks
into the guest. This patch aligns the in-kernel irqchip emulation with
the user space irqchip with already supports this feature. The trick is
to route PIT interrupts to all LAPIC's LVT0 lines.

Rebased and slightly polished patch originally posted by Sheng Yang.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:41 +02:00
Jan Kiszka 66a5a347c2 KVM: VMX: fix real-mode NMI support
Fix NMI injection in real-mode with the same pattern we perform IRQ
injection.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:41 +02:00
Jan Kiszka f460ee43e2 KVM: VMX: refactor IRQ and NMI window enabling
do_interrupt_requests and vmx_intr_assist go different way for
achieving the same: enabling the nmi/irq window start notification.
Unify their code over enable_{irq|nmi}_window, get rid of a redundant
call to enable_intr_window instead of direct enable_nmi_window
invocation and unroll enable_intr_window for both in-kernel and user
space irq injection accordingly.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:41 +02:00
Jan Kiszka 33f089ca5a KVM: VMX: refactor/fix IRQ and NMI injectability determination
There are currently two ways in VMX to check if an IRQ or NMI can be
injected:
 - vmx_{nmi|irq}_enabled and
 - vcpu.arch.{nmi|interrupt}_window_open.
Even worse, one test (at the end of vmx_vcpu_run) uses an inconsistent,
likely incorrect logic.

This patch consolidates and unifies the tests over
{nmi|interrupt}_window_open as cache + vmx_update_window_states
for updating the cache content.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:40 +02:00
Jan Kiszka 448fa4a9c5 KVM: x86: Reset pending/inject NMI state on CPU reset
CPU reset invalidates pending or already injected NMIs, therefore reset
the related state variables.

Based on original patch by Gleb Natapov.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:40 +02:00
Jan Kiszka 60637aacfd KVM: VMX: Support for NMI task gates
Properly set GUEST_INTR_STATE_NMI and reset nmi_injected when a
task-switch vmexit happened due to a task gate being used for handling
NMIs. Also avoid the false warning about valid vectoring info in
kvm_handle_exit.

Based on original patch by Gleb Natapov.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:40 +02:00
Jan Kiszka e4a41889ec KVM: VMX: Use INTR_TYPE_NMI_INTR instead of magic value
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:40 +02:00
Jan Kiszka a26bf12afb KVM: VMX: include all IRQ window exits in statistics
irq_window_exits only tracks IRQ window exits due to user space
requests, nmi_window_exits include all exits. The latter makes more
sense, so let's adjust irq_window_exits accounting.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:39 +02:00
Guillaume Thouvenin 2786b014ec KVM: x86 emulator: consolidate push reg
This patch consolidate the emulation of push reg instruction.

Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@bull.net>
Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
Signed-off-by: Avi Kivity <avi@redhat.com>
2008-12-31 16:51:39 +02:00
Martin Schwidefsky c742b31c03 [PATCH] fast vdso implementation for CLOCK_THREAD_CPUTIME_ID
The extract cpu time instruction (ectg) instruction allows the user
process to get the current thread cputime without calling into the
kernel. The code that uses the instruction needs to switch to the
access registers mode to get access to the per-cpu info page that
contains the two base values that are needed to calculate the current
cputime from the CPU timer with the ectg instruction.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-12-31 15:11:49 +01:00
Martin Schwidefsky 9cfb9b3c3a [PATCH] improve idle cputime accounting
Distinguish the cputime of the idle process where idle is actually using
cpu cycles from the cputime where idle is sleeping on an enabled wait psw.
The former is accounted as system time, the later as idle time.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-12-31 15:11:48 +01:00
Martin Schwidefsky 6f43092441 [PATCH] improve precision of idle time detection.
Increase the precision of the idle time calculation that is exported
to user space via /sys/devices/system/cpu/cpu<x>/idle_time_us

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-12-31 15:11:47 +01:00
Martin Schwidefsky aa5e97ce4b [PATCH] improve precision of process accounting.
The unit of the cputime accouting values that are stored per process is
currently a microsecond. The CPU timer has a maximum granularity of
2**-12 microseconds. There is no benefit in storing the per process values
in the lesser precision and there is the disadvantage that the backend
has to do the rounding to microseconds. The better solution is to use
the maximum granularity of the CPU timer as cputime unit.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-12-31 15:11:47 +01:00
Martin Schwidefsky 79741dd357 [PATCH] idle cputime accounting
The cpu time spent by the idle process actually doing something is
currently accounted as idle time. This is plain wrong, the architectures
that support VIRT_CPU_ACCOUNTING=y can do better: distinguish between the
time spent doing nothing and the time spent by idle doing work. The first
is accounted with account_idle_time and the second with account_system_time.
The architectures that use the account_xxx_time interface directly and not
the account_xxx_ticks interface now need to do the check for the idle
process in their arch code. In particular to improve the system vs true
idle time accounting the arch code needs to measure the true idle time
instead of just testing for the idle process.
To improve the tick based accounting as well we would need an architecture
primitive that can tell us if the pt_regs of the interrupted context
points to the magic instruction that halts the cpu.

In addition idle time is no more added to the stime of the idle process.
This field now contains the system time of the idle process as it should
be. On systems without VIRT_CPU_ACCOUNTING this will always be zero as
every tick that occurs while idle is running will be accounted as idle
time.

This patch contains the necessary common code changes to be able to
distinguish idle system time and true idle time. The architectures with
support for VIRT_CPU_ACCOUNTING need some changes to exploit this.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-12-31 15:11:46 +01:00
Martin Schwidefsky 457533a7d3 [PATCH] fix scaled & unscaled cputime accounting
The utimescaled / stimescaled fields in the task structure and the
global cpustat should be set on all architectures. On s390 the calls
to account_user_time_scaled and account_system_time_scaled never have
been added. In addition system time that is accounted as guest time
to the user time of a process is accounted to the scaled system time
instead of the scaled user time.
To fix the bugs and to prevent future forgetfulness this patch merges
account_system_time_scaled into account_system_time and
account_user_time_scaled into account_user_time.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Jeremy Fitzhardinge <jeremy@xensource.com>
Cc: Chris Wright <chrisw@sous-sol.org>
Cc: Michael Neuling <mikey@neuling.org>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-12-31 15:11:46 +01:00
Rusty Russell 2ca1a61583 Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:

	arch/x86/kernel/io_apic.c
2008-12-31 23:05:57 +10:30
Linus Torvalds ab70537c32 Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus:
  lguest: struct device - replace bus_id with dev_name()
  lguest: move the initial guest page table creation code to the host
  kvm-s390: implement config_changed for virtio on s390
  virtio_console: support console resizing
  virtio: add PCI device release() function
  virtio_blk: fix type warning
  virtio: block: dynamic maximum segments
  virtio: set max_segment_size and max_sectors to infinite.
  virtio: avoid implicit use of Linux page size in balloon interface
  virtio: hand virtio ring alignment as argument to vring_new_virtqueue
  virtio: use KVM_S390_VIRTIO_RING_ALIGN instead of relying on pagesize
  virtio: use LGUEST_VRING_ALIGN instead of relying on pagesize
  virtio: Don't use PAGE_SIZE for vring alignment in virtio_pci.
  virtio: rename 'pagesize' arg to vring_init/vring_size
  virtio: Don't use PAGE_SIZE in virtio_pci.c
  virtio: struct device - replace bus_id with dev_name(), dev_set_name()
  virtio-pci queue allocation not page-aligned
2008-12-30 17:37:25 -08:00
Linus Torvalds 14a3c4ab0e Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (407 commits)
  [ARM] pxafb: add support for overlay1 and overlay2 as framebuffer devices
  [ARM] pxafb: cleanup of the timing checking code
  [ARM] pxafb: cleanup of the color format manipulation code
  [ARM] pxafb: add palette format support for LCCR4_PAL_FOR_3
  [ARM] pxafb: add support for FBIOPAN_DISPLAY by dma braching
  [ARM] pxafb: allow pxafb_set_par() to start from arbitrary yoffset
  [ARM] pxafb: allow video memory size to be configurable
  [ARM] pxa: add document on the MFP design and how to use it
  [ARM] sa1100_wdt: don't assume CLOCK_TICK_RATE to be a constant
  [ARM] rtc-sa1100: don't assume CLOCK_TICK_RATE to be a constant
  [ARM] pxa/tavorevb: update board support (smartpanel LCD + keypad)
  [ARM] pxa: Update eseries defconfig
  [ARM] 5352/1: add w90p910-plat config file
  [ARM] s3c: S3C options should depend on PLAT_S3C
  [ARM] mv78xx0: implement GPIO and GPIO interrupt support
  [ARM] Kirkwood: implement GPIO and GPIO interrupt support
  [ARM] Orion: share GPIO IRQ handling code
  [ARM] Orion: share GPIO handling code
  [ARM] s3c: define __io using the typesafe version
  [ARM] S3C64XX: Ensure CPU_V6 is selected
  ...
2008-12-30 17:36:49 -08:00
Linus Torvalds 526ea064f9 Merge branch 'oprofile-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'oprofile-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  oprofile: select RING_BUFFER
  ring_buffer: adding EXPORT_SYMBOLs
  oprofile: fix lost sample counter
  oprofile: remove nr_available_slots()
  oprofile: port to the new ring_buffer
  ring_buffer: add remaining cpu functions to ring_buffer.h
  oprofile: moving cpu_buffer_reset() to cpu_buffer.h
  oprofile: adding cpu_buffer_entries()
  oprofile: adding cpu_buffer_write_commit()
  oprofile: adding cpu buffer r/w access functions
  ftrace: remove unused function arg in trace_iterator_increment()
  ring_buffer: update description for ring_buffer_alloc()
  oprofile: set values to default when creating oprofilefs
  oprofile: implement switch/case in buffer_sync.c
  x86/oprofile: cleanup IBS init/exit functions in op_model_amd.c
  x86/oprofile: reordering IBS code in op_model_amd.c
  oprofile: fix typo
  oprofile: whitspace changes only
  oprofile: update comment for oprofile_add_sample()
  oprofile: comment cleanup
2008-12-30 17:31:25 -08:00
Linus Torvalds 6de71484cf Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-next-2.6: (98 commits)
  sparc: move select of ARCH_SUPPORTS_MSI
  sparc: drop SUN_IO
  sparc: unify sections.h
  sparc: use .data.init_task section for init_thread_union
  sparc: fix array overrun check in of_device_64.c
  sparc: unify module.c
  sparc64: prepare module_64.c for unification
  sparc64: use bit neutral Elf symbols
  sparc: unify module.h
  sparc: introduce CONFIG_BITS
  sparc: fix hardirq.h removal fallout
  sparc64: do not export pus_fs_struct
  sparc: use sparc64 version of scatterlist.h
  sparc: Commonize memcmp assembler.
  sparc: Unify strlen assembler.
  sparc: Add asm/asm.h
  sparc: Kill memcmp_32.S code which has been ifdef'd out for centuries.
  sparc: replace for_each_cpu_mask_nr with for_each_cpu
  sparc: fix sparse warnings in irq_32.c
  sparc: add include guards to kernel.h
  ...
2008-12-30 17:23:31 -08:00
Linus Torvalds 1dff81f20c Merge branch 'for-2.6.29' of git://git.kernel.dk/linux-2.6-block
* 'for-2.6.29' of git://git.kernel.dk/linux-2.6-block: (43 commits)
  bio: get rid of bio_vec clearing
  bounce: don't rely on a zeroed bio_vec list
  cciss: simplify parameters to deregister_disk function
  cfq-iosched: fix race between exiting queue and exiting task
  loop: Do not call loop_unplug for not configured loop device.
  loop: Flush possible running bios when loop device is released.
  alpha: remove dead BIO_VMERGE_BOUNDARY
  Get rid of CONFIG_LSF
  block: make blk_softirq_init() static
  block: use min_not_zero in blk_queue_stack_limits
  block: add one-hit cache for disk partition lookup
  cfq-iosched: remove limit of dispatch depth of max 4 times quantum
  nbd: tell the block layer that it is not a rotational device
  block: get rid of elevator_t typedef
  aio: make the lookup_ioctx() lockless
  bio: add support for inlining a number of bio_vecs inside the bio
  bio: allow individual slabs in the bio_set
  bio: move the slab pointer inside the bio_set
  bio: only mempool back the largest bio_vec slab cache
  block: don't use plugging on SSD devices
  ...
2008-12-30 17:20:05 -08:00
Linus Torvalds 179475a3b4 Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, sparseirq: clean up Kconfig entry
  x86: turn CONFIG_SPARSE_IRQ off by default
  sparseirq: fix numa_migrate_irq_desc dependency and comments
  sparseirq: add kernel-doc notation for new member in irq_desc, -v2
  locking, irq: enclose irq_desc_lock_class in CONFIG_LOCKDEP
  sparseirq, xen: make sure irq_desc is allocated for interrupts
  sparseirq: fix !SMP building, #2
  x86, sparseirq: move irq_desc according to smp_affinity, v7
  proc: enclose desc variable of show_stat() in CONFIG_SPARSE_IRQ
  sparse irqs: add irqnr.h to the user headers list
  sparse irqs: handle !GENIRQ platforms
  sparseirq: fix !SMP && !PCI_MSI && !HT_IRQ build
  sparseirq: fix Alpha build failure
  sparseirq: fix typo in !CONFIG_IO_APIC case
  x86, MSI: pass irq_cfg and irq_desc
  x86: MSI start irq numbering from nr_irqs_gsi
  x86: use NR_IRQS_LEGACY
  sparse irq_desc[] array: core kernel and x86 changes
  genirq: record IRQ_LEVEL in irq_desc[]
  irq.h: remove padding from irq_desc on 64bits
2008-12-30 16:20:19 -08:00
Linus Torvalds bb758e9637 Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  hrtimers: fix warning in kernel/hrtimer.c
  x86: make sure we really have an hpet mapping before using it
  x86: enable HPET on Fujitsu u9200
  linux/timex.h: cleanup for userspace
  posix-timers: simplify de_thread()->exit_itimers() path
  posix-timers: check ->it_signal instead of ->it_pid to validate the timer
  posix-timers: use "struct pid*" instead of "struct task_struct*"
  nohz: suppress needless timer reprogramming
  clocksource, acpi_pm.c: put acpi_pm_read_slow() under CONFIG_PCI
  nohz: no softirq pending warnings for offline cpus
  hrtimer: removing all ur callback modes, fix
  hrtimer: removing all ur callback modes, fix hotplug
  hrtimer: removing all ur callback modes
  x86: correct link to HPET timer specification
  rtc-cmos: export second NVRAM bank

Fixed up conflicts in sound/drivers/pcsp/pcsp.c and sound/core/hrtimer.c
manually.
2008-12-30 16:16:21 -08:00
Linus Torvalds 5f34fe1cfc Merge branch 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (63 commits)
  stacktrace: provide save_stack_trace_tsk() weak alias
  rcu: provide RCU options on non-preempt architectures too
  printk: fix discarding message when recursion_bug
  futex: clean up futex_(un)lock_pi fault handling
  "Tree RCU": scalable classic RCU implementation
  futex: rename field in futex_q to clarify single waiter semantics
  x86/swiotlb: add default swiotlb_arch_range_needs_mapping
  x86/swiotlb: add default phys<->bus conversion
  x86: unify pci iommu setup and allow swiotlb to compile for 32 bit
  x86: add swiotlb allocation functions
  swiotlb: consolidate swiotlb info message printing
  swiotlb: support bouncing of HighMem pages
  swiotlb: factor out copy to/from device
  swiotlb: add arch hook to force mapping
  swiotlb: allow architectures to override phys<->bus<->phys conversions
  swiotlb: add comment where we handle the overflow of a dma mask on 32 bit
  rcu: fix rcutorture behavior during reboot
  resources: skip sanity check of busy resources
  swiotlb: move some definitions to header
  swiotlb: allow architectures to override swiotlb pool allocation
  ...

Fix up trivial conflicts in
  arch/x86/kernel/Makefile
  arch/x86/mm/init_32.c
  include/linux/hardirq.h
as per Ingo's suggestions.
2008-12-30 16:10:19 -08:00
Jaswinder Singh Rajput 7820b75643 x86: xsave.c: restore_user_xstate should be static
Impact: cleanup, reduce kernel size a bit, avoid sparse warning

Fixes sparse warning:
arch/x86/kernel/xsave.c:162:5: warning: symbol 'restore_user_xstate' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-12-30 13:31:41 -08:00
Jaswinder Singh Rajput fa95826fe0 x86: uv_bau.h: fix dubious bitfield
Impact: cleanup, avoid sparse warnings

declare bitfield as unsigned to avoid dubious bitfield issue

 CHECK   arch/x86/kernel/tlb_64.c
arch/x86/include/asm/uv/uv_bau.h:136:22: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:138:25: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:140:15: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:143:14: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:146:14: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:149:18: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:151:18: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:155:14: error: dubious one-bit signed bitfield
arch/x86/include/asm/uv/uv_bau.h:159:18: error: dubious one-bit signed bitfield
arch/x86/include/asm/uv/uv_bau.h:173:19: error: dubious one-bit signed bitfield
arch/x86/include/asm/uv/uv_bau.h:181:16: error: dubious one-bit signed bitfield
arch/x86/include/asm/uv/uv_bau.h:185:18: error: dubious one-bit signed bitfield
arch/x86/include/asm/uv/uv_bau.h:188:16: error: dubious one-bit signed bitfield

 CHECK   arch/x86/kernel/tlb_uv.c
arch/x86/include/asm/uv/uv_bau.h:136:22: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:138:25: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:140:15: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:143:14: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:146:14: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:149:18: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:151:18: warning: dubious bitfield without explicit `signed' or `unsigned'
arch/x86/include/asm/uv/uv_bau.h:155:14: error: dubious one-bit signed bitfield
arch/x86/include/asm/uv/uv_bau.h:159:18: error: dubious one-bit signed bitfield
arch/x86/include/asm/uv/uv_bau.h:173:19: error: dubious one-bit signed bitfield
arch/x86/include/asm/uv/uv_bau.h:181:16: error: dubious one-bit signed bitfield
arch/x86/include/asm/uv/uv_bau.h:185:18: error: dubious one-bit signed bitfield
arch/x86/include/asm/uv/uv_bau.h:188:16: error: dubious one-bit signed bitfield

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-12-30 13:31:37 -08:00
Jaswinder Singh Rajput ec8c842a52 x86: apic.c: xapic_icr_read and x2apic_icr_read should be static
Impact: cleanup, reduce kernel size a bit, avoid sparse warning

Fixes sparse warning:
arch/x86/kernel/apic.c:270:5: warning: symbol 'x2apic_icr_read' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-12-30 13:31:28 -08:00
Dmitry Torokhov 1dd3294677 Merge branch 'next' into for-linus 2008-12-30 01:10:06 -08:00
Jaswinder Singh Rajput c62e9d56ea x86: bios_uv.c: uv_systab should be static
Impact: cleanup, reduce kernel size a bit, avoid sparse warning

Fixes sparse warning:
arch/x86/kernel/bios_uv.c:28:18: warning: symbol 'uv_systab' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-12-29 22:08:28 -08:00
Jaswinder Singh Rajput 4d08d97f52 x86: genx2apic_phys.c: x2apic_send_IPI_self and init_x2apic_ldr should be static
Impact: cleanup, reduce kernel size a bit, avoid sparse warnings

Fixes sparse warnings:
arch/x86/kernel/genx2apic_phys.c:164:6: warning: symbol 'x2apic_send_IPI_self' was not declared. Should it be static?
arch/x86/kernel/genx2apic_phys.c:169:6: warning: symbol 'init_x2apic_ldr' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-12-29 22:08:22 -08:00
Jaswinder Singh Rajput 557f687c87 x86: amd_iommu.c: prealloc_protection_domains should be static
Impact: cleanup, reduce kernel size a bit, avoid sparse warning

Fixes sparse warning:
arch/x86/kernel/amd_iommu.c:1299:6: warning: symbol 'prealloc_protection_domains' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-12-29 22:08:17 -08:00
Jaswinder Singh Rajput 412a1be265 x86: amd_iommu_init.c: iommu_enable and iommu_enable_event_logging should be static
Impact: cleanup, reduce kernel size a bit, avoid sparse warning

Fixes sparse warning:
arch/x86/kernel/amd_iommu_init.c:246:13: warning: symbol 'iommu_enable' was not declared. Should it be static?
arch/x86/kernel/amd_iommu_init.c:259:13: warning: symbol 'iommu_enable_event_logging' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-12-29 22:08:12 -08:00
Matias Zabaljauregui 58a2456644 lguest: move the initial guest page table creation code to the host
This patch moves the initial guest page table creation code to the host,
so the launcher keeps working with PAE enabled configs.

Signed-off-by: Matias Zabaljauregui <zabaljauregui@gmail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
2008-12-30 09:26:11 +10:30
Rusty Russell db40598863 virtio: use KVM_S390_VIRTIO_RING_ALIGN instead of relying on pagesize
This doesn't really matter, since s390 pagesize is 4k anyway.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
2008-12-30 09:26:03 +10:30
Rusty Russell 33edcf133b Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 2008-12-30 08:02:35 +10:30
Russell King 47992cbdae Merge branch 'for-rmk' of git://git.kernel.org/pub/scm/linux/kernel/git/ycmiao/pxa-linux-2.6 into devel 2008-12-29 18:08:11 +00:00
Jaswinder Singh Rajput 824877111c x86, pci: move arch/x86/pci/pci.h to arch/x86/include/asm/pci_x86.h
Impact: cleanup

Now that arch/x86/pci/pci.h is used in a number of other places as well,
move the lowlevel x86 pci definitions into the architecture include files.
(not to be confused with the existing arch/x86/include/asm/pci.h file,
which provides public details about x86 PCI)

Tested on: X86_32_UP, X86_32_SMP and X86_64_SMP

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-29 18:17:36 +01:00
Jaswinder Singh Rajput c854c91979 x86_64: pci-gart_64.c iommu_fullflush should be static
Impact: cleanup, reduce kernel size a bit, avoid sparse warning

Fixes sparse warning:

  arch/x86/kernel/pci-gart_64.c:55:5: warning: symbol 'iommu_fullflush' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-29 18:17:33 +01:00
Jaswinder Singh Rajput cbafbc826b x86: efi.c declare add_efi_memmap before they get used
Impact: cleanup, avoid sparse warning

Fixes this sparse warning:

  arch/x86/kernel/efi.c:67:5: warning: symbol 'add_efi_memmap' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-29 18:17:32 +01:00
Jaswinder Singh Rajput 7f3e632f9d x86: io_apic.c io_apic_sync should be static
Impact: cleanup, reduce kernel size a bit, avoid sparse warning

Fixes sparse warning:

  arch/x86/kernel/io_apic.c:709:6: warning: symbol 'io_apic_sync' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-29 18:17:31 +01:00
Jaswinder Singh Rajput a1ae299dfb x86: apic.c declare pic_mode before they get used
Impact: cleanup, avoid sparse warning

In asm/mpspec.h moved out pic_mode from CONFIG_X86_32 as it is common
for both 32 and 64 bit.

Fixes this sparse warning for x86_64:

  arch/x86/kernel/apic.c:128:5: warning: symbol 'pic_mode' was not declared. Should it be static?

Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-29 18:17:30 +01:00
Yong Yao e0ee629878 Input: add support for enhanced rotary controller on pxa930 and pxa935
Signed-off-by: Yong Yao <yaoyong@marvell.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-12-29 04:59:16 -08:00
Yong Yao 105ca2398f Input: add support for trackball on pxa930 and pxa935
Signed-off-by: Yong Yao <yaoyong@marvell.com>
Signed-off-by: Eric Miao <eric.miao@marvell.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
2008-12-29 04:58:58 -08:00