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2011-03-17call_function_many: add missing orderingMilton Miller1-13/+33
Paul McKenney's review pointed out two problems with the barriers in the 2.6.38 update to the smp call function many code. First, a barrier that would force the func and info members of data to be visible before their consumption in the interrupt handler was missing. This can be solved by adding a smp_wmb between setting the func and info members and setting setting the cpumask; this will pair with the existing and required smp_rmb ordering the cpumask read before the read of refs. This placement avoids the need a second smp_rmb in the interrupt handler which would be executed on each of the N cpus executing the call request. (I was thinking this barrier was present but was not). Second, the previous write to refs (establishing the zero that we the interrupt handler was testing from all cpus) was performed by a third party cpu. This would invoke transitivity which, as a recient or concurrent addition to memory-barriers.txt now explicitly states, would require a full smp_mb(). However, we know the cpumask will only be set by one cpu (the data owner) and any preivous iteration of the mask would have cleared by the reading cpu. By redundantly writing refs to 0 on the owning cpu before the smp_wmb, the write to refs will follow the same path as the writes that set the cpumask, which in turn allows us to keep the barrier in the interrupt handler a smp_rmb instead of promoting it to a smp_mb (which will be be executed by N cpus for each of the possible M elements on the list). I moved and expanded the comment about our (ab)use of the rcu list primitives for the concurrent walk earlier into this function. I considered moving the first two paragraphs to the queue list head and lock, but felt it would have been too disconected from the code. Cc: Paul McKinney <[email protected]> Cc: [email protected] (2.6.32 and later) Signed-off-by: Milton Miller <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-03-17call_function_many: fix list delete vs add raceMilton Miller1-7/+13
Peter pointed out there was nothing preventing the list_del_rcu in smp_call_function_interrupt from running before the list_add_rcu in smp_call_function_many. Fix this by not setting refs until we have gotten the lock for the list. Take advantage of the wmb in list_add_rcu to save an explicit additional one. I tried to force this race with a udelay before the lock & list_add and by mixing all 64 online cpus with just 3 random cpus in the mask, but was unsuccessful. Still, inspection shows a valid race, and the fix is a extension of the existing protection window in the current code. Cc: [email protected] (v2.6.32 and later) Reported-by: Peter Zijlstra <[email protected]> Signed-off-by: Milton Miller <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-03-17mm: PageBuddy and mapcount robustnessAndrea Arcangeli2-4/+11
Change the _mapcount value indicating PageBuddy from -2 to -128 for more robusteness against page_mapcount() undeflows. Use reset_page_mapcount instead of __ClearPageBuddy in bad_page to ignore the previous retval of PageBuddy(). Signed-off-by: Andrea Arcangeli <[email protected]> Reported-by: Hugh Dickins <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-03-17arch/tile: support newer binutils assembler shift semanticsChris Metcalf3-9/+29
This change supports building the kernel with newer binutils where a shift of greater than the word size is no longer interpreted silently as modulo the word size, but instead generates a warning. Signed-off-by: Chris Metcalf <[email protected]>
2011-03-17Merge tag 'v2.6.38' of ↵Chris Metcalf545-2464/+4801
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into for-linus
2011-03-17Merge branch 'for_linus' of ↵Linus Torvalds163-17/+19408
git://git.kernel.org/pub/scm/linux/kernel/git/epip/linux-2.6-unicore32 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/epip/linux-2.6-unicore32: (40 commits) unicore32: rewrite arch-specific tlb.h to use asm-generic version unicore32: modify io_p2v and io_v2p macros, and adjust PKUNITY_mmio_BASEs unicore32: replace unicore32-specific iomap functions with generic lib implementation unicore32 machine related: add frame buffer driver for pkunity-v3 soc unicore32 machine related files: add i2c bus drivers for pkunity-v3 soc unicore32 io: redefine __REG(x) and re-use readl/writel funcs unicore32 i8042 upgrade and bugfix: adjust resource request region type unicore32 upgrade to v2.6.38-rc5: add one more paramter for pte_alloc_map call unicore32 i8042: adjust io funcs of i8042-unicore32io.h unicore32: rename PKUNITY_IOSPACE_BASE to PKUNITY_MMIO_BASE unicore32: modify function names and parameters for irq_chips unicore32: remove unused lines in arch/unicore32/include/asm/irq.h unicore32 time.c: change calculate method for clock_event_device unicore32: ADD MAINTAINER for unicore32 architecture unicore32 machine related files: ps2 driver unicore32 machine related files: pci bus handling unicore32 machine related files: hardware registers unicore32 machine related files: core files unicore32 additional architecture files: boot process unicore32 additional architecture files: low-level lib: misc ... Acked-by: Arnd Bergmann <[email protected]>
2011-03-17Merge branch 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6Linus Torvalds19-178/+248
* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6: [S390] kexec: Disable ftrace during kexec [S390] support XZ compressed kernel [S390] css_bus_type: make it static [S390] css_driver: remove duplicate members [S390] css: remove subchannel private [S390] css: move chsc_private to drv_data [S390] css: move io_private to drv_data [S390] cio: move cdev pointer to io_subchannel_private [S390] cio: move options to io_sch_private [S390] cio: move asms to generic header [S390] cio: move orb definitions to separate header [S390] Write protect module text and RO data [S390] dasd: get rid of compile warning [S390] remove superfluous check from do_IRQ [S390] remove redundant stack check option
2011-03-17Merge branch 'sh-latest' of ↵Linus Torvalds25-552/+1250
git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6 * 'sh-latest' of git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6: (34 commits) sh: Convert to generic show_interrupts. sh: Wire up new fhandle and clock_adjtime syscalls. sh: modify platform_device for sh_eth driver sh: add GETHER's platform_device in board-sh7757lcr sh: update sh7757lcr_defconfig sh: add platform_device of tmio_mmc and sh_mmcif to sh7757lcr sh: dmaengine support for SH7757 sh: add mmc clock in clock-sh7757 sh: add spi_board_info in sh7757lcr sh: add platform_device for SPI sh: add USB_ARCH_HAS_EHCI and OHCI for SH7757 sh: Rename cpuidle states to fit general conventions serial: sh-sci: fix deadlock when resuming from S3 sleep sh: Enable CONFIG_GCOV_PROFILE_ALL for sh sh: Fix up async PCIe probing on SMP. serial: sh-sci: Kill off the special earlyprintk device. serial: sh-sci: Use dev_name() for region reservations. serial: sh-sci: Fix up earlyprintk port mapping. serial: sh-sci: Limit early console to one device. serial: sh-sci: Fix up break timer scheduling race. ...
2011-03-17Merge git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6Linus Torvalds17-1054/+787
* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/fbdev-2.6: fbdev: sh_mobile_lcdc: Add YUV framebuffer support viafb: split pll configs up viafb: remove duplicated clock storage viafb: always return the best possible clock viafb: remove duplicated clock information fbdev: sh_mobile_lcdcfb: add backlight support viafb: factor lcd scaling parameters out viafb: strip some structures viafb: remove unused data_mode and device_type viafb: kill lcd_panel_id video via: make local variables static video via: fix iomem access video/via: drop deprecated (and unused) i2c_adapter.id
2011-03-17RPC: killing RPC tasks races fixedStanislav Kinsbursky1-1/+3
RPC task RPC_TASK_QUEUED bit is set must be checked before trying to wake up task rpc_killall_tasks() because task->tk_waitqueue can not be set (equal to NULL). Also, as Trond Myklebust mentioned, such approach (instead of checking tk_waitqueue to NULL) allows us to "optimise away the call to rpc_wake_up_queued_task() altogether for those tasks that aren't queued". Here is an example of dereferencing of tk_waitqueue equal to NULL: CPU 0 CPU 1 CPU 2 -------------------- --------------------- -------------------------- nfs4_run_open_task rpc_run_task rpc_execute rpc_set_active rpc_make_runnable (waiting) rpc_async_schedule nfs4_open_prepare nfs_wait_on_sequence nfs_umount_begin rpc_killall_tasks rpc_wake_up_task rpc_wake_up_queued_task spin_lock(tk_waitqueue == NULL) BUG() rpc_sleep_on spin_lock(&q->lock) __rpc_sleep_on task->tk_waitqueue = q Signed-off-by: Stanislav Kinsbursky <[email protected]> Cc: [email protected] Signed-off-by: Trond Myklebust <[email protected]>
2011-03-17xprt: remove redundant check[email protected]1-1/+1
remove redundant check. Signed-off-by: Jinqiu Yang <[email protected]> Signed-off-by: Trond Myklebust <[email protected]>
2011-03-17SUNRPC: Convert struct rpc_xprt to use atomic_t countersTrond Myklebust2-10/+9
Signed-off-by: Trond Myklebust <[email protected]>
2011-03-17SUNRPC: Ensure we always run the tk_callback before tk_actionTrond Myklebust1-8/+6
This fixes a race in which the task->tk_callback() puts the rpc_task to sleep, setting a new callback. Under certain circumstances, the current code may end up executing the task->tk_action before it gets round to the callback. Signed-off-by: Trond Myklebust <[email protected]> Cc: [email protected]
2011-03-17Merge branch 'drm-core-next' of ↵Linus Torvalds181-6429/+9262
git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6 * 'drm-core-next' of git://git.kernel.org/pub/scm/linux/kernel/git/airlied/drm-2.6: (177 commits) drm/radeon: fixup refcounts in radeon dumb create ioctl. drm: radeon: *_cs_packet_parse_vline() cleanup radeon: merge list_del()/list_add_tail() to list_move_tail() drm: Retry i2c transfer of EDID block after failure drm/radeon/kms: fix typo in atom overscan setup drm: Hold the mode mutex whilst probing for sysfs status drm/nouveau: fix __nouveau_fence_wait performance drm/nv40: attempt to reserve just enough vram for all 32 channels drm/nv50: check for vm traps on every gr irq drm/nv50: decode vm faults some more drm/nouveau: add nouveau_enum_find() util function drm/nouveau: properly handle pushbuffer check failures drm/nvc0: remove vm hack forcing large/small pages to not share a PDE drm/i915: disable opregion lid detection for now. drm/i915: Only wait on a pending flip if we intend to write to the buffer drm/i915/dp: Sanity check eDP existence drm: add cap bit to denote if dumb ioctl is available or not. drm/core: add ioctl to query device/driver capabilities drm/radeon/kms: allow max clock of 340 Mhz on hdmi 1.3+ drm/radeon/kms: add cayman pci ids ...
2011-03-17KVM: unbreak userspace that does not sets tss addressGleb Natapov1-0/+13
Commit 6440e5967bc broke old userspaces that do not set tss address before entering vcpu. Unbreak it by setting tss address to a safe value on the first vcpu entry. New userspaces should set tss address, so print warning in case it doesn't. Signed-off-by: Gleb Natapov <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2011-03-17KVM: MMU: cleanup pte write pathXiao Guangrong3-56/+32
This patch does: - call vcpu->arch.mmu.update_pte directly - use gfn_to_pfn_atomic in update_pte path The suggestion is from Avi. Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: MMU: introduce a common function to get no-dirty-logged slotXiao Guangrong1-20/+17
Cleanup the code of pte_prefetch_gfn_to_memslot and mapping_level_dirty_bitmap Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: fix rcu usage in init_rmode_* functionsXiao Guangrong1-4/+8
fix: [ 3494.671786] stack backtrace: [ 3494.671789] Pid: 10527, comm: qemu-system-x86 Not tainted 2.6.38-rc6+ #23 [ 3494.671790] Call Trace: [ 3494.671796] [] ? lockdep_rcu_dereference+0x9d/0xa5 [ 3494.671826] [] ? kvm_memslots+0x6b/0x73 [kvm] [ 3494.671834] [] ? gfn_to_memslot+0x16/0x4f [kvm] [ 3494.671843] [] ? gfn_to_hva+0x16/0x27 [kvm] [ 3494.671851] [] ? kvm_write_guest_page+0x31/0x83 [kvm] [ 3494.671861] [] ? kvm_clear_guest_page+0x1a/0x1c [kvm] [ 3494.671867] [] ? vmx_set_tss_addr+0x83/0x122 [kvm_intel] and: [ 8328.789599] stack backtrace: [ 8328.789601] Pid: 18736, comm: qemu-system-x86 Not tainted 2.6.38-rc6+ #23 [ 8328.789603] Call Trace: [ 8328.789609] [] ? lockdep_rcu_dereference+0x9d/0xa5 [ 8328.789621] [] ? kvm_memslots+0x6b/0x73 [kvm] [ 8328.789628] [] ? gfn_to_memslot+0x16/0x4f [kvm] [ 8328.789635] [] ? gfn_to_hva+0x16/0x27 [kvm] [ 8328.789643] [] ? kvm_write_guest_page+0x31/0x83 [kvm] [ 8328.789699] [] ? kvm_clear_guest_page+0x1a/0x1c [kvm] [ 8328.789713] [] ? vmx_create_vcpu+0x316/0x3c8 [kvm_intel] Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: fix kvmclock regression due to missing clock updateNikola Ciprich1-1/+1
commit 387b9f97750444728962b236987fbe8ee8cc4f8c moved kvm_request_guest_time_update(vcpu), breaking 32bit SMP guests using kvm-clock. Fix this by moving (new) clock update function to proper place. Signed-off-by: Nikola Ciprich <[email protected]> Acked-by: Zachary Amsden <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: emulator: Fix permission checking in io permission bitmapGleb Natapov1-3/+2
Currently if io port + len crosses 8bit boundary in io permission bitmap the check may allow IO that otherwise should not be allowed. The patch fixes that. Signed-off-by: Gleb Natapov <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: emulator: Fix io permission checking for 64bit guestGleb Natapov3-21/+35
Current implementation truncates upper 32bit of TR base address during IO permission bitmap check. The patch fixes this. Reported-and-tested-by: Francis Moreau <[email protected]> Signed-off-by: Gleb Natapov <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: SVM: Load %gs earlier if CONFIG_X86_32_LAZY_GS=nAvi Kivity1-0/+5
With CONFIG_CC_STACKPROTECTOR, we need a valid %gs at all times, so disable lazy reload and do an eager reload immediately after the vmexit. Reported-by: IVAN ANGELOV <[email protected]> Acked-By: Joerg Roedel <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: x86: Remove useless regs_page pointer from kvm_lapicTakuya Yoshikawa3-7/+5
Access to this page is mostly done through the regs member which holds the address to this page. The exceptions are in vmx_vcpu_reset() and kvm_free_lapic() and these both can easily be converted to using regs. Signed-off-by: Takuya Yoshikawa <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: improve comment on rcu use in irqfd_deassignMichael S. Tsirkin1-2/+3
The RCU use in kvm_irqfd_deassign is tricky: we have rcu_assign_pointer but no synchronize_rcu: synchronize_rcu is done by kvm_irq_routing_update which we share a spinlock with. Fix up a comment in an attempt to make this clearer. Signed-off-by: Michael S. Tsirkin <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: MMU: remove unused macrosXiao Guangrong2-8/+0
These macros are not used, so removed Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: MMU: cleanup page alloc and freeXiao Guangrong1-5/+5
Using __get_free_page instead of alloc_page and page_address, using free_page instead of __free_page and virt_to_page Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: MMU: do not record gfn in kvm_mmu_pte_writeXiao Guangrong3-7/+2
No need to record the gfn to verifier the pte has the same mode as current vcpu, it's because we only speculatively update the pte only if the pte and vcpu have the same mode Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: MMU: move mmu pages calculated out of mmu lockXiao Guangrong1-5/+5
kvm_mmu_calculate_mmu_pages need to walk all memslots and it's protected by kvm->slots_lock, so move it out of mmu spinlock Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: MMU: set spte accessed bit properlyXiao Guangrong1-1/+1
Set spte accessed bit only if guest_initiated == 1 that means the really accessed Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: MMU: fix kvm_mmu_slot_remove_write_access dropping intermediate W bitsXiao Guangrong1-2/+7
Only remove write access in the last sptes. Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: Start lock documentationJan Kiszka1-0/+25
The goal of this document shall be - overview of all locks used in KVM core - provide details on the scope of each lock - explain the lock type, specifically of a raw spin locks - provide a lock ordering guide Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: better readability of efer_reserved_bitsLai Jiangshan1-2/+3
use EFER_SCE, EFER_LME and EFER_LMA instead of magic numbers. Signed-off-by: Lai Jiangshan <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: Clear async page fault hash after switching to real modeLai Jiangshan1-1/+3
The hash array of async gfns may still contain some left gfns after kvm_clear_async_pf_completion_queue() called, need to clear them. Signed-off-by: Lai Jiangshan <[email protected]> Acked-by: Gleb Natapov <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: VMX: Initialize vm86 TSS only once.Gleb Natapov1-22/+6
Currently vm86 task is initialized on each real mode entry and vcpu reset. Initialization is done by zeroing TSS and updating relevant fields. But since all vcpus are using the same TSS there is a race where one vcpu may use TSS while other vcpu is initializing it, so the vcpu that uses TSS will see wrong TSS content and will behave incorrectly. Fix that by initializing TSS only once. Signed-off-by: Gleb Natapov <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: VMX: update live TR selector if it changes in real modeGleb Natapov1-0/+1
When rmode.vm86 is active TR descriptor is updated with vm86 task values, but selector is left intact. vmx_set_segment() makes sure that if TR register is written into while vm86 is active the new values are saved for use after vm86 is deactivated, but since selector is not updated on vm86 activation/deactivation new value is lost. Fix this by writing new selector into vmcs immediately. Signed-off-by: Gleb Natapov <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: VMX: add the __noclone attribute to vmx_vcpu_runLai Jiangshan1-1/+1
The changelog of 104f226 said "adds the __noclone attribute", but it was missing in its patch. I think it is still needed. Signed-off-by: Lai Jiangshan <[email protected]> Acked-by: Andi Kleen <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2011-03-17KVM: x86: Convert tsc_write_lock to raw_spinlockJan Kiszka2-4/+4
Code under this lock requires non-preemptibility. Ensure this also over -rt by converting it to raw spinlock. Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: remove isr_ack logic from PICGleb Natapov2-27/+2
isr_ack logic was added by e48258009d to avoid unnecessary IPIs. Back then it made sense, but now the code checks that vcpu is ready to accept interrupt before sending IPI, so this logic is no longer needed. The patch removes it. Fixes a regression with Debian/Hurd. Signed-off-by: Gleb Natapov <[email protected]> Reported-and-tested-by: Jonathan Nieder <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: VMX: fix detection of BIOS disabling VMXJoseph Cihula1-2/+8
This patch fixes the logic used to detect whether BIOS has disabled VMX, for the case where VMX is enabled only under SMX, but tboot is not active. Signed-off-by: Joseph Cihula <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: Convert kvm_lock to raw_spinlockJan Kiszka4-23/+23
Code under this lock requires non-preemptibility. Ensure this also over -rt by converting it to raw spinlock. Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: SVM: check for progress after IRET interceptionAvi Kivity1-1/+9
When we enable an NMI window, we ask for an IRET intercept, since the IRET re-enables NMIs. However, the IRET intercept happens before the instruction executes, while the NMI window architecturally opens afterwards. To compensate for this mismatch, we only open the NMI window in the following exit, assuming that the IRET has by then executed; however, this assumption is not always correct; we may exit due to a host interrupt or page fault, without having executed the instruction. Fix by checking for forward progress by recording and comparing the IRET's rip. This is somewhat of a hack, since an unchaging rip does not mean that no forward progress has been made, but is the simplest fix for now. Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: Fix race between nmi injection and enabling nmi windowAvi Kivity2-1/+4
The interrupt injection logic looks something like if an nmi is pending, and nmi injection allowed inject nmi if an nmi is pending request exit on nmi window the problem is that "nmi is pending" can be set asynchronously by the PIT; if it happens to fire between the two if statements, we will request an nmi window even though nmi injection is allowed. On SVM, this has disasterous results, since it causes eflags.TF to be set in random guest code. The fix is simple; make nmi_pending synchronous using the standard vcpu->requests mechanism; this ensures the code above is completely synchronous wrt nmi_pending. Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: use yield_to instead of sleep in kvm_vcpu_on_spinRik van Riel2-10/+48
Instead of sleeping in kvm_vcpu_on_spin, which can cause gigantic slowdowns of certain workloads, we instead use yield_to to get another VCPU in the same KVM guest to run sooner. This seems to give a 10-15% speedup in certain workloads. Signed-off-by: Rik van Riel <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: keep track of which task is running a KVM vcpuRik van Riel2-0/+11
Keep track of which task is running a KVM vcpu. This helps us figure out later what task to wake up if we want to boost a vcpu that got preempted. Unfortunately there are no guarantees that the same task always keeps the same vcpu, so we can only track the task across a single "run" of the vcpu. Signed-off-by: Rik van Riel <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17export pid symbols needed for kvm_vcpu_on_spinRik van Riel2-0/+3
Export the symbols required for a race-free kvm_vcpu_on_spin. Signed-off-by: Rik van Riel <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2011-03-17KVM: Drop ad-hoc vendor specific instruction restrictionAvi Kivity1-28/+5
Use the new support in the emulator, and drop the ad-hoc code in x86.c. Signed-off-by: Avi Kivity <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2011-03-17KVM: x86 emulator: vendor specific instructionsAvi Kivity2-3/+10
Mark some instructions as vendor specific, and allow the caller to request emulation only of vendor specific instructions. This is useful in some circumstances (responding to a #UD fault). Signed-off-by: Avi Kivity <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2011-03-17KVM: Drop bogus x86_decode_insn() error checkAvi Kivity1-3/+0
x86_decode_insn() doesn't return X86EMUL_* values, so the check for X86EMUL_PROPOGATE_FAULT will always fail. There is a proper check later on, so there is no need for a replacement for this code. Signed-off-by: Avi Kivity <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2011-03-17KVM: x86: Drop obsolete warning about INIT on runnable VCPUJan Kiszka1-4/+0
This warning was once used for debugging QEMU user space. Though uncommon, it is actually possible to send an INIT request to a running VCPU. So better drop this warning before someone misuses it to flood kernel logs this way. Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2011-03-17KVM: x86: release kvmclock page on resetGlauber Costa1-8/+12
When a vcpu is reset, kvmclock page keeps being written to this days. This is wrong and inconsistent: a cpu reset should take it to its initial state. Signed-off-by: Glauber Costa <[email protected]> CC: Jan Kiszka <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
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