Commit Graph

57831 Commits

Author SHA1 Message Date
Linus Torvalds 19504828b4 Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  perf tools: Fix sample size bit operations
  perf tools: Fix ommitted mmap data update on remap
  watchdog: Change the default timeout and configure nmi watchdog period based on watchdog_thresh
  watchdog: Disable watchdog when thresh is zero
  watchdog: Only disable/enable watchdog if neccessary
  watchdog: Fix rounding bug in get_sample_period()
  perf tools: Propagate event parse error handling
  perf tools: Robustify dynamic sample content fetch
  perf tools: Pre-check sample size before parsing
  perf tools: Move evlist sample helpers to evlist area
  perf tools: Remove junk code in mmap size handling
  perf tools: Check we are able to read the event size on mmap
2011-05-23 09:25:52 -07:00
Linus Torvalds 57d19e80f4 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
  b43: fix comment typo reqest -> request
  Haavard Skinnemoen has left Atmel
  cris: typo in mach-fs Makefile
  Kconfig: fix copy/paste-ism for dell-wmi-aio driver
  doc: timers-howto: fix a typo ("unsgined")
  perf: Only include annotate.h once in tools/perf/util/ui/browsers/annotate.c
  md, raid5: Fix spelling error in comment ('Ofcourse' --> 'Of course').
  treewide: fix a few typos in comments
  regulator: change debug statement be consistent with the style of the rest
  Revert "arm: mach-u300/gpio: Fix mem_region resource size miscalculations"
  audit: acquire creds selectively to reduce atomic op overhead
  rtlwifi: don't touch with treewide double semicolon removal
  treewide: cleanup continuations and remove logging message whitespace
  ath9k_hw: don't touch with treewide double semicolon removal
  include/linux/leds-regulator.h: fix syntax in example code
  tty: fix typo in descripton of tty_termios_encode_baud_rate
  xtensa: remove obsolete BKL kernel option from defconfig
  m68k: fix comment typo 'occcured'
  arch:Kconfig.locks Remove unused config option.
  treewide: remove extra semicolons
  ...
2011-05-23 09:12:26 -07:00
Linus Torvalds 710421cc7d Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (346 commits)
  ASoC: core: Don't set "(null)" as a driver name
  ALSA: hda - Use LPIB for ATI/AMD chipsets as default
  Revert "ALSA: hda - Use position_fix=3 as default for AMD chipsets"
  ASoC: Tegra: Fix compile when debugfs not enabled
  ASoC: spdif-dit: Add missing MODULE_*
  SOUND: OSS: Remove Au1550 driver.
  ALSA: hda - add Intel Panther Point HDMI codec id
  ALSA: emu10k1 - Add dB range to Bass and Treble for SB Live!
  ALSA: hda - Remove PCM mixer elements from Virtual Master of realtek
  ALSA: hda - Fix input-src parse in patch_analog.c
  ASoC: davinci-mcasp: enable ping-pong SRAM buffers
  ASoC: add iPAQ hx4700 machine driver
  ASoC: Asahi Kasei AK4641 codec driver
  ALSA: hda - Enable Realtek ALC269 codec input layer beep
  ALSA: intel8x0m: enable AMD8111 modem
  ALSA: HDA: Add jack detection for HDMI
  ALSA: sound, core, pcm_lib: fix xrun_log
  ASoC: Max98095: Move existing NULL check before pointer dereference.
  ALSA: sound, core, pcm_lib: xrun_log: log also in_interrupt
  ALSA: usb-audio - Add support for USB X-Fi S51 Pro
  ...
2011-05-23 08:52:38 -07:00
Linus Torvalds d7ef64a9f9 Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86: Eliminate various 'set but not used' warnings
  x86, SMEP: Fix section mismatch warnings
  x86, amd: Use _safe() msr access for GartTlbWlk disable code
2011-05-23 08:51:55 -07:00
Linus Torvalds f4b10bc60a Merge branch 'kvm-updates/2.6.40' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.40' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (131 commits)
  KVM: MMU: Use ptep_user for cmpxchg_gpte()
  KVM: Fix kvm mmu_notifier initialization order
  KVM: Add documentation for KVM_CAP_NR_VCPUS
  KVM: make guest mode entry to be rcu quiescent state
  KVM: x86 emulator: Make jmp far emulation into a separate function
  KVM: x86 emulator: Rename emulate_grpX() to em_grpX()
  KVM: x86 emulator: Remove unused arg from emulate_pop()
  KVM: x86 emulator: Remove unused arg from writeback()
  KVM: x86 emulator: Remove unused arg from read_descriptor()
  KVM: x86 emulator: Remove unused arg from seg_override()
  KVM: Validate userspace_addr of memslot when registered
  KVM: MMU: Clean up gpte reading with copy_from_user()
  KVM: PPC: booke: add sregs support
  KVM: PPC: booke: save/restore VRSAVE (a.k.a. USPRG0)
  KVM: PPC: use ticks, not usecs, for exit timing
  KVM: PPC: fix exit accounting for SPRs, tlbwe, tlbsx
  KVM: PPC: e500: emulate SVR
  KVM: VMX: Cache vmcs segment fields
  KVM: x86 emulator: consolidate segment accessors
  KVM: VMX: Avoid reading %rip unnecessarily when handling exceptions
  ...
2011-05-23 08:42:08 -07:00
Mandeep Singh Baines 4eec42f392 watchdog: Change the default timeout and configure nmi watchdog period based on watchdog_thresh
Before the conversion of the NMI watchdog to perf event, the
watchdog timeout was 5 seconds. Now it is 60 seconds. For my
particular application, netbooks, 5 seconds was a better
timeout. With a short timeout, we catch faults earlier and are
able to send back a panic. With a 60 second timeout, the user is
unlikely to wait and will instead hit the power button, causing
us to lose the panic info.

This change configures the NMI period to watchdog_thresh and
sets the softlockup_thresh to watchdog_thresh * 2. In addition,
watchdog_thresh was reduced to 10 seconds as suggested by Ingo
Molnar.

Signed-off-by: Mandeep Singh Baines <msb@chromium.org>
Cc: Marcin Slusarz <marcin.slusarz@gmail.com>
Cc: Don Zickus <dzickus@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Link: http://lkml.kernel.org/r/1306127423-3347-4-git-send-email-msb@chromium.org
Signed-off-by: Ingo Molnar <mingo@elte.hu>
LKML-Reference: <20110517071642.GF22305@elte.hu>
2011-05-23 11:58:59 +02:00
Linus Torvalds e98bae7592 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: (28 commits)
  sparc32: fix build, fix missing cpu_relax declaration
  SCHED_TTWU_QUEUE is not longer needed since sparc32 now implements IPI
  sparc32,leon: Remove unnecessary page_address calls in LEON DMA API.
  sparc: convert old cpumask API into new one
  sparc32, sun4d: Implemented SMP IPIs support for SUN4D machines
  sparc32, sun4m: Implemented SMP IPIs support for SUN4M machines
  sparc32,leon: Implemented SMP IPIs for LEON CPU
  sparc32: implement SMP IPIs using the generic functions
  sparc32,leon: SMP power down implementation
  sparc32,leon: added some SMP comments
  sparc: add {read,write}*_be routines
  sparc32,leon: don't rely on bootloader to mask IRQs
  sparc32,leon: operate on boot-cpu IRQ controller registers
  sparc32: always define boot_cpu_id
  sparc32: removed unused code, implemented by generic code
  sparc32: avoid build warning at mm/percpu.c:1647
  sparc32: always register a PROM based early console
  sparc32: probe for cpu info only during startup
  sparc: consolidate show_cpuinfo in cpu.c
  sparc32,leon: implement genirq CPU affinity
  ...
2011-05-22 22:06:24 -07:00
Linus Torvalds 82da65dab5 x86: setup_smep needs to be __cpuinit
The setup_smep function gets calle at resume time too, and is thus not a
pure __init function.  When marked as __init, it gets thrown out after
the kernel has initialized, and when the kernel is suspended and
resumed, the code will no longer be around, and we'll get a nice "kernel
tried to execute NX-protected page" oops because the page is no longer
marked executable.

Reported-and-tested-by: Parag Warudkar <parag.lkml@gmail.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: "H. Peter Anvin" <hpa@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2011-05-22 21:44:13 -07:00
Sam Ravnborg f400bdb1d6 sparc32: fix build, fix missing cpu_relax declaration
Fix following sparc (32 bit) build error:

  CC      arch/sparc/kernel/asm-offsets.s
In file included from include/linux/seqlock.h:29:0,
                 from include/linux/time.h:8,
                 from include/linux/timex.h:56,
                 from include/linux/sched.h:57,
                 from arch/sparc/kernel/asm-offsets.c:13:
include/linux/spinlock.h: In function 'spin_unlock_wait':
include/linux/spinlock.h:360:2: error: implicit declaration of function 'cpu_relax'

Most likely caused by commit e66eed651f ("list: remove
prefetching from regular list iterators") due to include
changes.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
2011-05-22 21:41:35 -07:00
Linus Torvalds 17238005f3 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/parisc-2.6:
  [PARISC] wire up syncfs syscall
  [PARISC] wire up the fhandle syscalls
  [PARISC] wire up clock_adjtime syscall
  [PARISC] wire up fanotify syscalls
  [PARISC] prevent speculative re-read on cache flush
  [PARISC] only make executable areas executable
  [PARISC] fix pacache .size with new binutils
2011-05-22 12:38:40 -07:00
Takuya Yoshikawa c8cfbb555e KVM: MMU: Use ptep_user for cmpxchg_gpte()
The address of the gpte was already calculated and stored in ptep_user
before entering cmpxchg_gpte().

This patch makes cmpxchg_gpte() to use that to make it clear that we
are using the same address during walk_addr_generic().

Note that the unlikely annotations are used to show that the conditions
are something unusual rather than for performance.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-05-22 08:48:14 -04:00
Takuya Yoshikawa d2f62766d5 KVM: x86 emulator: Make jmp far emulation into a separate function
We introduce em_jmp_far().

We also call this from em_grp45() to stop treating modrm_reg == 5 case
separately in the group 5 emulation.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:48:06 -04:00
Takuya Yoshikawa 51187683cb KVM: x86 emulator: Rename emulate_grpX() to em_grpX()
The prototypes are changed appropriately.

We also replaces "goto grp45;" with simple em_grp45() call.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:48:05 -04:00
Takuya Yoshikawa 3b9be3bf2e KVM: x86 emulator: Remove unused arg from emulate_pop()
The opt of emulate_grp1a() is also removed.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:48:03 -04:00
Takuya Yoshikawa adddcecf92 KVM: x86 emulator: Remove unused arg from writeback()
Remove inline at this chance.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:48:00 -04:00
Takuya Yoshikawa 509cf9fe11 KVM: x86 emulator: Remove unused arg from read_descriptor()
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:47:59 -04:00
Takuya Yoshikawa c1ed6dea81 KVM: x86 emulator: Remove unused arg from seg_override()
In addition, one comma at the end of a statement is replaced with a
semicolon.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:47:57 -04:00
Takuya Yoshikawa fa3d315a4c KVM: Validate userspace_addr of memslot when registered
This way, we can avoid checking the user space address many times when
we read the guest memory.

Although we can do the same for write if we check which slots are
writable, we do not care write now: reading the guest memory happens
more often than writing.

[avi: change VERIFY_READ to VERIFY_WRITE]

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:47:56 -04:00
Takuya Yoshikawa 12cb814f3b KVM: MMU: Clean up gpte reading with copy_from_user()
When we optimized walk_addr_generic() by not using the generic guest
memory reader, we replaced copy_from_user() with get_user():

  commit e30d2a170506830d5eef5e9d7990c5aedf1b0a51
  KVM: MMU: Optimize guest page table walk

  commit 15e2ac9a43d4d7d08088e404fddf2533a8e7d52e
  KVM: MMU: Fix 64-bit paging breakage on x86_32

But as Andi pointed out later, copy_from_user() does the same as
get_user() as long as we give a constant size to it.

So we use copy_from_user() to clean up the code.

The only, noticeable, regression introduced by this is 64-bit gpte
reading on x86_32 hosts needed for PAE guests.

But this can be mitigated by implementing 8-byte get_user() for x86_32,
if needed.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:47:54 -04:00
Scott Wood 5ce941ee42 KVM: PPC: booke: add sregs support
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-22 08:47:53 -04:00
Scott Wood eab176722f KVM: PPC: booke: save/restore VRSAVE (a.k.a. USPRG0)
Linux doesn't use USPRG0 (now renamed VRSAVE in the architecture, even
when Altivec isn't involved), but a guest might.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-22 08:47:50 -04:00
Stuart Yoder 1a040b26c5 KVM: PPC: use ticks, not usecs, for exit timing
Convert to microseconds when displaying
(with fix from Bharat Bhushan <Bharat.Bhushan@freescale.com>).

This reduces rounding error with large quantities of short exits.

Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-22 08:47:49 -04:00
Scott Wood 49ea06957b KVM: PPC: fix exit accounting for SPRs, tlbwe, tlbsx
The exit type setting for mfspr/mtspr is moved from 44x to toplevel SPR
emulation.  This enables it on e500, and makes sure that all SPRs
are covered.

Exit accounting for tlbwe and tlbsx is added to e500.

Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-22 08:47:47 -04:00
Scott Wood 90d34b0e45 KVM: PPC: e500: emulate SVR
Return the actual host SVR for now, as we already do for PVR.  Eventually
we may support Qemu overriding PVR/SVR if the situation is appropriate,
once we implement KVM_SET_SREGS on e500.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2011-05-22 08:47:46 -04:00
Avi Kivity 2fb92db1ec KVM: VMX: Cache vmcs segment fields
Since the emulator now checks segment limits and access rights, it
generates a lot more accesses to the vmcs segment fields.  Undo some
of the performance hit by cacheing those fields in a read-only cache
(the entire cache is invalidated on any write, or on guest exit).

Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:47:45 -04:00
Avi Kivity 1aa366163b KVM: x86 emulator: consolidate segment accessors
Instead of separate accessors for the segment selector and cached descriptor,
use one accessor for both.  This simplifies the code somewhat.

Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:47:39 -04:00
Avi Kivity 0a434bb2bf KVM: VMX: Avoid reading %rip unnecessarily when handling exceptions
Avoids a VMREAD.

Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:40:01 -04:00
Joe Perches ae8cc05955 KVM: SVM: Make dump_vmcb static, reduce text
dump_vmcb isn't used outside this module, make it static.
Shrink text and object by ~1% by standardizing formats.

$ size arch/x86/kvm/svm.o*
   text	   data	    bss	    dec	    hex	filename
  52910	    580	  10072	  63562	   f84a	arch/x86/kvm/svm.o.new
  53563	    580	  10072	  64215	   fad7	arch/x86/kvm/svm.o.old

Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:40:00 -04:00
Takuya Yoshikawa 8f74d8e168 KVM: MMU: Fix 64-bit paging breakage on x86_32
Fix regression introduced by
  commit e30d2a170506830d5eef5e9d7990c5aedf1b0a51
  KVM: MMU: Optimize guest page table walk

On x86_32, get_user() does not support 64-bit values and we fail to
build KVM at the point of 64-bit paging.

This patch fixes this by using get_user() twice for that condition.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Reported-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:58 -04:00
Jeff Mahoney b74323dc2b KVM: ia64: fix sparse warnings
This patch fixes some sparse warning about "dubious one-bit signed bitfield."

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Originally-by: Jan Blunck <jblunck@suse.de>
Signed-off-by: Jan Blunck <jblunck@suse.de>
Acked-by: Xiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:57 -04:00
BrillyWu@viatech.com.cn 4429d5dc11 KVM: Add CPUID support for VIA CPU
The CPUIDs for Centaur are added, and then the features of
PadLock hardware engine on VIA CPU, such as "ace", "ace_en"
and so on, can be passed into the kvm guest.

Signed-off-by: Brilly Wu <brillywu@viatech.com.cn>
Signed-off-by: Kary Jin <karyjin@viatech.com.cn>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:55 -04:00
Gleb Natapov 2aab2c5b2b KVM: call cache_all_regs() only once during instruction emulation
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:54 -04:00
Gleb Natapov 0004c7c257 KVM: Fix compound mmio
mmio_index should be taken into account when copying data from
userspace.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:52 -04:00
Gleb Natapov 4947e7cd0e KVM: emulator: Propagate fault in far jump emulation
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:51 -04:00
Gleb Natapov 8d7d810255 KVM: mmio_fault_cr2 is not used
Remove unused variable mmio_fault_cr2.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:49 -04:00
Avi Kivity 46561646ce KVM: x86 emulator: consolidate group handling
Move all groups into a single field and handle them in a single place.  This
saves bits when we add more group types (3 bits -> 7 groups types).

Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:48 -04:00
Avi Kivity 781e0743af KVM: MMU: Add unlikely() annotations to walk_addr_generic()
walk_addr_generic() is a hot path and is also hard for the cpu to predict -
some of the parameters (fetch_fault in particular) vary wildly from
invocation to invocation.

Add unlikely() annotations where appropriate; all walk failures are
considered unlikely, as are cases where we have to mark the accessed or
dirty bit, as they are slow paths both in kvm and on real processors.

Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:46 -04:00
Takuya Yoshikawa 62aaa2f05a KVM: x86 emulator: Use opcode::execute for PUSHF/POPF (9C/9D)
For this, em_pushf/popf() are introduced.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:45 -04:00
Takuya Yoshikawa b96a7fad02 KVM: x86 emulator: Use opcode::execute for PUSHA/POPA (60/61)
For this, emulate_pusha/popa() are converted to em_pusha/popa().

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:43 -04:00
Takuya Yoshikawa c54fe50469 KVM: x86 emulator: Use opcode::execute for POP reg (58-5F)
In addition, the RET emulation is changed to call em_pop() to remove
the pop_instruction label.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:41 -04:00
Takuya Yoshikawa d67fc27ae2 KVM: x86 emulator: Use opcode::execute for Group 1, CMPS and SCAS
The following instructions are changed to use opcode::execute.

Group 1 (80-83)
  ADD (00-05), OR (08-0D), ADC (10-15), SBB (18-1D), AND (20-25),
  SUB (28-2D), XOR (30-35), CMP (38-3D)

CMPS (A6-A7), SCAS (AE-AF)

The last two do the same as CMP in the emulator, so em_cmp() is used.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:40 -04:00
Takuya Yoshikawa 6e2ca7d180 KVM: MMU: Optimize guest page table walk
This patch optimizes the guest page table walk by using get_user()
instead of copy_from_user().

With this patch applied, paging64_walk_addr_generic() has become
about 0.5us to 1.0us faster on my Phenom II machine with NPT on.

Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:38 -04:00
Avi Kivity 40e19b519c KVM: SVM: Get rid of x86_intercept_map::valid
By reserving 0 as an invalid x86_intercept_stage, we no longer
need to store a valid flag in x86_intercept_map.

Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:37 -04:00
Avi Kivity 5ef39c71d8 KVM: x86 emulator: Use opcode::execute for 0F 01 opcode
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:35 -04:00
Avi Kivity 68152d8812 KVM: x86 emulator: Don't force #UD for 0F 01 /5
While it isn't defined, no need to force a #UD.  If it becomes defined
in the future this can cause wierd problems for the guest.

Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:34 -04:00
Avi Kivity 26d05cc740 KVM: x86 emulator: move 0F 01 sub-opcodes into their own functions
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:32 -04:00
Randy Dunlap d42244499f KVM: x86 emulator: fix const value warning on i386 in svm insn RAX check
arch/x86/kvm/emulate.c:2598: warning: integer constant is too large for 'long' type

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:30 -04:00
Clemens Noss cfb223753c KVM: x86 emulator: avoid calling wbinvd() macro
Commit 0b56652e33c72092956c651ab6ceb9f0ad081153 fails to build:

  CC [M]  arch/x86/kvm/emulate.o
arch/x86/kvm/emulate.c: In function 'x86_emulate_insn':
arch/x86/kvm/emulate.c:4095:25: error: macro "wbinvd" passed 1 arguments, but takes just 0
arch/x86/kvm/emulate.c:4095:3: warning: statement with no effect
make[2]: *** [arch/x86/kvm/emulate.o] Error 1
make[1]: *** [arch/x86/kvm] Error 2
make: *** [arch/x86] Error 2

Work around this for now.

Signed-off-by: Clemens Noss <cnoss@gmx.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:29 -04:00
Roedel, Joerg a78484c60e KVM: MMU: Make cmpxchg_gpte aware of nesting too
This patch makes the cmpxchg_gpte() function aware of the
difference between l1-gfns and l2-gfns when nested
virtualization is in use.  This fixes a potential
data-corruption problem in the l1-guest and makes the code
work correct (at least as correct as the hardware which is
emulated in this code) again.

Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:26 -04:00
Avi Kivity 13db70eca6 KVM: x86 emulator: drop x86_emulate_ctxt::vcpu
No longer used.

Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22 08:39:24 -04:00