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# Date Author Comment
4a043713 05/02/2011 03:51 pm Paolo Bonzini

kvm: use qemu_free consistently

Signed-off-by: Paolo Bonzini <>
Signed-off-by: Marcelo Tosatti <>

0c31b744 05/02/2011 02:24 pm Glauber Costa

kvm: use kernel-provided para_features instead of statically coming up with new capabilities

Use the features provided by KVM_GET_SUPPORTED_CPUID directly to
mask out features from guest-visible cpuid.

The old get_para_features() mechanism is kept for older kernels that do not implement it....

bb4ea393 03/16/2011 10:11 pm Jan Kiszka

kvm: Align kvm_arch_handle_exit to kvm_cpu_exec changes

Make the return code of kvm_arch_handle_exit directly usable for
kvm_cpu_exec. This is straightforward for x86 and ppc, just s390
would require more work. Avoid this for now by pushing the return code...

2a4dac83 03/16/2011 10:11 pm Jan Kiszka

kvm: x86: Reorder functions in kvm.c

Required for next patch which will access guest debug services from
kvm_arch_handle_exit. No functional changes.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

f2574737 03/16/2011 10:11 pm Jan Kiszka

kvm: x86: Push kvm_arch_debug to kvm_arch_handle_exit

There are no generic bits remaining in the handling of KVM_EXIT_DEBUG.
So push its logic completely into arch hands, i.e. only x86 so far.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

4601f7b0 03/16/2011 10:11 pm Jan Kiszka

kvm: x86: Do not leave halt if interrupts are disabled

When an external interrupt is pending but IF is cleared, we must not
leave the halt state prematurely.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

0c03266a 03/16/2011 10:11 pm Jan Kiszka

kvm: x86: Synchronize PAT MSR with the kernel

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

c34d440a 03/15/2011 06:19 am Jan Kiszka

kvm: x86: Consolidate TCG and KVM MCE injection code

This switches KVM's MCE injection path to cpu_x86_inject_mce, both for
SIGBUS and monitor initiated events. This means we prepare the MCA MSRs
in the VCPUState also for KVM.

We have to drop the MSRs writeback restrictions for this purpose which...

32a42024 03/15/2011 06:19 am Jan Kiszka

kvm: x86: Clean up kvm_setup_mce

There is nothing to abstract here. Fold kvm_setup_mce into its caller
and fix up the error reporting (return code of kvm_vcpu_ioctl holds the
error value).

Signed-off-by: Jan Kiszka <>
CC: Huang Ying <>...

75d49497 03/15/2011 06:19 am Jan Kiszka

kvm: x86: Fail kvm_arch_init_vcpu if MCE initialization fails

There is no reason to continue if the kernel claims to support MCE but
then fails to process our request.

Signed-off-by: Jan Kiszka <>
CC: Huang Ying <>...

3c85e74f 03/15/2011 06:19 am Huang Ying

KVM, MCE, unpoison memory address across reboot

In Linux kernel HWPoison processing implementation, the virtual
address in processes mapping the error physical memory page is marked
as HWPoison. So that, the further accessing to the virtual
address will kill corresponding processes with SIGBUS....

419fb20a 03/15/2011 06:19 am Jan Kiszka

kvm: x86: Move MCE functions together

Pure function suffling to avoid multiple #ifdef KVM_CAP_MCE sections,
no functional changes. While at it, annotate some #ifdef sections.

Signed-off-by: Jan Kiszka <>
CC: Huang Ying <>...

99036865 03/15/2011 06:19 am Jan Kiszka

kvm: Rename kvm_arch_process_irqchip_events to async_events

We will broaden the scope of this function on x86 beyond irqchip events.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

ab443475 03/15/2011 06:19 am Jan Kiszka

kvm: x86: Inject pending MCE events on state writeback

The current way of injecting MCE events without updating of and
synchronizing with the CPUState is broken and causes spurious
corruptions of the MCE-related parts of the CPUState.

As a first step towards a fix, enhance the state writeback code with...

b7680cb6 03/13/2011 04:44 pm Jan Kiszka

Refactor thread retrieval and check

We have qemu_cpu_self and qemu_thread_self. The latter is retrieving the
current thread, the former is checking for equality (using CPUState). We
also have qemu_thread_equal which is only used like qemu_cpu_self.

This refactors the interfaces, creating qemu_cpu_is_self and...

b8cc45d6 02/14/2011 04:39 pm Glauber Costa

kvm: make tsc stable over migration and machine start

If the machine is stopped, we should not record two different tsc values
upon a save operation. The same problem happens with kvmclock.

But kvmclock is taking a different diretion, being now seen as a separate...

6792a57b 02/14/2011 04:39 pm Jan Kiszka

kvm: Separate TCG from KVM cpu execution

Mixing up TCG bits with KVM already led to problems around eflags
emulation on x86. Moreover, quite some code that TCG requires on cpu
enty/exit is useless for KVM. So dispatch between tcg_cpu_exec and
kvm_cpu_exec as early as possible....

db1669bc 02/14/2011 04:39 pm Jan Kiszka

kvm: x86: Prepare VCPU loop for in-kernel irqchip

Effectively no functional change yet as kvm_irqchip_in_kernel still only
returns 0, but this patch will allow qemu-kvm to adopt the VCPU loop of
upsteam KVM.

Signed-off-by: Jan Kiszka <>...

7a39fe58 02/14/2011 04:39 pm Jan Kiszka

kvm: Drop return values from kvm_arch_pre/post_run

We do not check them, and the only arch with non-empty implementations
always returns 0 (this is also true for qemu-kvm).

Signed-off-by: Jan Kiszka <>
CC: Alexander Graf <>...

ce377af3 02/14/2011 04:39 pm Jan Kiszka

kvm: x86: Catch and report failing IRQ and NMI injections

We do not need to abort, but the user should be notified that weird
things go on.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

a1b87fe0 02/14/2011 04:39 pm Jan Kiszka

kvm: Provide sigbus services arch-independently

Provide arch-independent kvm_on_sigbus* stubs to remove the #ifdef'ery
from cpus.c. This patch also fixes --disable-kvm build by providing the
missing kvm_on_sigbus_vcpu kvm-stub.

Signed-off-by: Jan Kiszka <>...

9ccfac9e 02/14/2011 04:39 pm Jan Kiszka

kvm: Unconditionally reenter kernel after IO exits

KVM requires to reenter the kernel after IO exits in order to complete
instruction emulation. Failing to do so will leave the kernel state
inconsistently behind. To ensure that we will get back ASAP, we issue a...

b3a98367 02/01/2011 11:32 pm Anthony Liguori

Merge remote branch 'qemu-kvm/uq/master' into staging

aliguori: fix build with !defined(KVM_CAP_ASYNC_PF)

Signed-off-by: Anthony Liguori <>

94a8d39a 01/23/2011 06:27 am Jan Kiszka

kvm: Consolidate must-have capability checks

Instead of splattering the code with #ifdefs and runtime checks for
capabilities we cannot work without anyway, provide central test
infrastructure for verifying their availability both at build and
runtime.

Signed-off-by: Jan Kiszka <>...

11076198 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Rework identity map and TSS setup for larger BIOS sizes

In order to support loading BIOSes > 256K, reorder the code, adjusting
the base if the kernel supports moving the identity map.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

d8f771d9 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Implicitly clear nmi_injected/pending on reset

All CPUX86State variables before CPU_COMMON are automatically cleared on
reset. Reorder nmi_injected and nmi_pending to avoid having to touch
them explicitly.

Signed-off-by: Jan Kiszka <>...

c5999bfc 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Only read/write MSR_KVM_ASYNC_PF_EN if supported

If the kernel does not support KVM_CAP_ASYNC_PF, it also does not know
about the related MSR. So skip it during state synchronization in that
case. Fixes annoying kernel warnings.

Signed-off-by: Jan Kiszka <>...

0d75a9ec 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Align kvm_arch_put_registers code with comment

The ordering doesn't matter in this case, but better keep it consistent.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

c14750e8 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Prepare kvm_get_mp_state for in-kernel irqchip

This code path will not yet be taken as we still lack in-kernel irqchip
support. But qemu-kvm can already make use of it and drop its own
mp_state access services.

Signed-off-by: Jan Kiszka <>...

3390e7f7 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Remove redundant mp_state initialization

kvm_arch_reset_vcpu initializes mp_state, and that function is invoked
right after kvm_arch_init_vcpu.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

1a5e9d2f 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Fix xcr0 reset mismerge

For unknown reasons, xcr0 reset ended up in kvm_arch_update_guest_debug
on upstream merge. Fix this and also remove the misleading comment (1 is
THE reset value).

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

c3a3a7d3 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Refactor msr_star/hsave_pa setup and checks

Simplify kvm_has_msr_star/hsave_pa to booleans and push their one-time
initialization into kvm_arch_init. Also handle potential errors of that
setup procedure.

Signed-off-by: Jan Kiszka <>...

ff5c186b 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Reset paravirtual MSRs

Make sure to write the cleared MSR_KVM_SYSTEM_TIME, MSR_KVM_WALL_CLOCK,
and MSR_KVM_ASYNC_PF_EN to the kernel state so that a freshly booted
guest cannot be disturbed by old values.

Signed-off-by: Jan Kiszka <>...

521f0798 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Fix !CONFIG_KVM_PARA build

If we lack kvm_para.h, MSR_KVM_ASYNC_PF_EN is not defined. The change in
kvm_arch_init_vcpu is just for consistency reasons.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

cad1e282 01/23/2011 06:27 am Jan Kiszka

kvm: Drop smp_cpus argument from init functions

No longer used.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

646042e1 01/23/2011 06:27 am Jan Kiszka

kvm: x86: Swallow KVM_EXIT_SET_TPR

This exit only triggers activity in the common exit path, but we should
accept it in order to be able to detect unknown exit types.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

73aaec4a 01/23/2011 06:27 am Jan Kiszka

kvm: Stop on all fatal exit reasons

Ensure that we stop the guest whenever we face a fatal or unknown exit
reason. If we stop, we also have to enforce a cpu loop exit.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

bb44e0d1 01/23/2011 06:27 am Jan Kiszka

kvm: Improve reporting of fatal errors

Report KVM_EXIT_UNKNOWN, KVM_EXIT_FAIL_ENTRY, and KVM_EXIT_EXCEPTION
with more details to stderr. The latter two are so far x86-only, so move
them into the arch-specific handler. Integrate the Intel real mode
warning on KVM_EXIT_FAIL_ENTRY that qemu-kvm carries, but actually...

31ce5e0c 01/21/2011 06:05 pm Jin Dongming

Add "broadcast" option for mce command

When the following test case is injected with mce command, maybe user could not
get the expected result.
DATA
command cpu bank status mcg_status addr misc
(qemu) mce 1 1 0xbd00000000000000 0x05 0x1234 0x8c...

2bd3e04c 01/21/2011 06:05 pm Jin Dongming

Add function for checking mca broadcast of CPU

Add function for checking whether current CPU support mca broadcast.

Signed-off-by: Jin Dongming <>
Signed-off-by: Marcelo Tosatti <>

6643e2f0 01/21/2011 06:05 pm Jin Dongming

kvm: introduce kvm_mce_in_progress

Share same error handing, and rename this function after
MCIP (Machine Check In Progress) flag.

Signed-off-by: Hidetoshi Seto <>
Signed-off-by: Jin Dongming <>...

e387c338 01/21/2011 06:05 pm Jin Dongming

kvm: kvm_mce_inj_* subroutines for templated error injections

Refactor codes for maintainability.

Signed-off-by: Hidetoshi Seto <>
Signed-off-by: Jin Dongming <>
Signed-off-by: Marcelo Tosatti <>

7cc2cc3e 01/21/2011 06:05 pm Jin Dongming

kvm: introduce kvm_inject_x86_mce_on

Pass a table instead of multiple args.

Note:

kvm_inject_x86_mce(env, bank, status, mcg_status, addr, misc,
abort_on_error);

is equal to:

struct kvm_x86_mce mce = {
.bank = bank,...
acaa7550 01/21/2011 06:05 pm Jan Kiszka

kvm: x86: Fix DPL write back of segment registers

The DPL is stored in the flags and not in the selector. In fact, the RPL
may differ from the DPL at some point in time, and so we were corrupting
the guest state so far.

Signed-off-by: Jan Kiszka <>...

3980e302 01/21/2011 06:05 pm Jan Kiszka

kvm: x86: Remove obsolete SS.RPL/DPL aligment

This seems to date back to the days KVM didn't support real mode. The
check is no longer needed and, even worse, is corrupting the guest state
in case SS.RPL != DPL.

Signed-off-by: Jan Kiszka <>...

95c077c9 01/21/2011 06:05 pm Jan Kiszka

kvm: x86: Prevent sign extension of DR7 in guest debugging mode

This unbreaks guest debugging when the 4th hardware breakpoint used for
guest debugging is a watchpoint of 4 or 8 byte lenght. The 31st bit of
DR7 is set in that case and used to cause a sign extension to the high...

b9bec74b 01/21/2011 06:05 pm Jan Kiszka

kvm: x86: Fix a few coding style violations

No functional changes.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Avi Kivity <>

276ce815 01/21/2011 06:05 pm Lai Jiangshan

kvm: Enable user space NMI injection for kvm guest

Make use of the new KVM_NMI IOCTL to send NMIs into the KVM guest if the
user space raised them. (example: qemu monitor's "nmi" command)

Signed-off-by: Lai Jiangshan <>
Acked-by: Jan Kiszka <>...

14a09518 01/21/2011 06:05 pm Lai Jiangshan

kvm: convert kvm_ioctl(KVM_CHECK_EXTENSION) to kvm_check_extension()

simple cleanup and use existing helper: kvm_check_extension().

Signed-off-by: Lai Jiangshan <>
Signed-off-by: Marcelo Tosatti <>

f6584ee2 11/16/2010 04:40 pm Gleb Natapov

Add support for async page fault to qemu

Add save/restore of MSR for migration and cpuid bit.

Signed-off-by: Gleb Natapov <>
Signed-off-by: Marcelo Tosatti <>

25d2e361 10/21/2010 06:37 pm Marcelo Tosatti

kvm: save/restore x86-64 MSRs on x86-64 kernels

Signed-off-by: Marcelo Tosatti <>

384331a6 10/21/2010 06:37 pm Marcelo Tosatti

kvm: writeback SMP TSCs on migration only

commit 6389c45441269baa2873e6feafebd17105ddeaf6
Author: Jan Kiszka <>
Date: Mon Mar 1 18:17:26 2010 +0100

qemu-kvm: Cleanup/fix TSC and PV clock writeback

Signed-off-by: Marcelo Tosatti <>

75b10c43 10/21/2010 06:37 pm Marcelo Tosatti

kvm: factor out kvm_has_msr_star

And add kvm_has_msr_hsave_pa(), to avoid warnings on older
kernels without support.

Signed-off-by: Marcelo Tosatti <>

aa851e36 10/21/2010 06:37 pm Marcelo Tosatti

kvm: add save/restore of MSR_VM_HSAVE_PA

commit 2bba4446746add456ceeb0e8359a43032a2ea333
Author: Alexander Graf <>
Date: Thu Dec 18 15:38:32 2008 +0100

Enable nested SVM support in userspace

Signed-off-by: Marcelo Tosatti <>

d8da8574 10/21/2010 06:12 pm Hidetoshi Seto

Fix build on !KVM_CAP_MCE

This patch removes following warnings:

target-i386/kvm.c: In function 'kvm_put_msrs':
target-i386/kvm.c:782: error: unused variable 'i'
target-i386/kvm.c: In function 'kvm_get_msrs':
target-i386/kvm.c:1083: error: label at end of compound statement...

f71ac88f 10/21/2010 06:11 pm Hidetoshi Seto

x86, mce: broadcast mce depending on the cpu version

There is no reason why SRAO event received by the main thread
is the only one that being broadcasted.

According to the x86 ASDM vol.3A 15.10.4.1,
MCE signal is broadcast on processor version 06H_EH or later....

f8502cfb 10/21/2010 06:09 pm Hidetoshi Seto

x86, mce: ignore SRAO only when MCG_SER_P is available

And restruct this block to call kvm_mce_in_exception() only when it is
required.

Signed-off-by: Hidetoshi Seto <>
Signed-off-by: Marcelo Tosatti <>

296acb64 10/21/2010 12:15 am Joerg Roedel

Add svm cpuid features

This patch adds the svm cpuid feature flags to the qemu
intialization path. It also adds the svm features available
on phenom to its cpu-definition and extends the host cpu
type to support all svm features KVM can provide.

Signed-off-by: Joerg Roedel <>...

e7701825 10/21/2010 12:15 am Marcelo Tosatti

kvm: x86: add mce support

Port qemu-kvm's MCE support

commit c68b2374c9048812f488e00ffb95db66c0bc07a7
Author: Huang Ying <>
Date: Mon Jul 20 10:00:53 2009 +0800

Add MCE simulation support to qemu/kvm
KVM ioctls are used to initialize MCE simulation and inject MCE. The...
c0532a76 10/21/2010 12:15 am Marcelo Tosatti

MCE: Relay UCR MCE to guest

Port qemu-kvm's

commit 4b62fff1101a7ad77553147717a8bd3bf79df7ef
Author: Huang Ying <>
Date: Mon Sep 21 10:43:25 2009 +0800

MCE: Relay UCR MCE to guest
UCR (uncorrected recovery) MCE is supported in recent Intel CPUs,...
57780495 10/21/2010 12:15 am Marcelo Tosatti

Add savevm/loadvm support for MCE

Port qemu-kvm's

commit 1bab5d11545d8de5facf46c28630085a2f9651ae
Author: Huang Ying <>
Date: Wed Mar 3 16:52:46 2010 +0800

Add savevm/loadvm support for MCE
MCE registers are saved/load into/from CPUState in...
0f53994f 10/21/2010 12:15 am Marcelo Tosatti

Fix memory leak in register save load due to xsave support

From: Avi Kivity <>
Signed-off-by: Marcelo Tosatti <>

c958a8bd 06/28/2010 07:06 pm Sheng Yang

kvm: Extend kvm_arch_get_supported_cpuid() to support index

Would use it later for XSAVE related CPUID.

Signed-off-by: Sheng Yang <>
Signed-off-by: Marcelo Tosatti <>

f1665b21 06/28/2010 07:06 pm Sheng Yang

kvm: Enable XSAVE live migration support

Signed-off-by: Sheng Yang <>
Signed-off-by: Marcelo Tosatti <>

ddced198 06/28/2010 07:06 pm Marcelo Tosatti

kvm: init mp_state

Signed-off-by: Marcelo Tosatti <>
Signed-off-by: Avi Kivity <>

408392b3 06/28/2010 07:06 pm Sheng Yang

kvm: Fix cpu_is_bsp() compilation warning

Signed-off-by: Sheng Yang <>
Signed-off-by: Avi Kivity <>

4a942cea 06/19/2010 10:42 am Blue Swirl

apic: avoid passing CPUState from CPU code

Pass only APICState when accessing APIC from CPU code.

Signed-off-by: Blue Swirl <>

c1667e40 05/11/2010 11:07 pm Gleb Natapov

kvm: fix 80000001.EDX supported bit filtering

On AMD some bits from 1.EDX are reported in 80000001.EDX. The mask used
to copy bits from 1.EDX to 80000001.EDX is incorrect resulting in
unsupported features passed into a guest.

Signed-off-by: Gleb Natapov <>...

4513d923 05/11/2010 08:03 pm Gleb Natapov

Do not stop VM if emulation failed in userspace.

Continue vcpu execution in case emulation failure happened while vcpu
was in userspace. In this case #UD will be injected into the guest
allowing guest OS to kill offending process and continue.

Signed-off-by: Gleb Natapov <>...

dbaa07c4 05/11/2010 08:02 pm Jan Kiszka

kvm: validate context for kvm cpu get/put operations

Validate that KVM vcpu state is only read/written from cpu thread itself
or that cpu is stopped.

Signed-off-by: Marcelo Tosatti <>
Signed-off-by: Avi Kivity <>

0af691d7 05/11/2010 08:02 pm Marcelo Tosatti

kvm: enable smp > 1

Process INIT/SIPI requests and enable -smp > 1.

Signed-off-by: Marcelo Tosatti <>
Signed-off-by: Avi Kivity <>

ff44f1a3 04/26/2010 05:28 pm Jan Kiszka

KVM: x86: Add debug register saving and restoring

Make use of the new KVM_GET/SET_DEBUGREGS to save/restore the x86 debug
registers.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Marcelo Tosatti <>

20420430 04/26/2010 05:28 pm Sheng Yang

kvm: allow qemu to set EPT identity mapping address

If we use larger BIOS image than current 256KB, we would need move reserved
TSS and EPT identity mapping pages. Currently TSS support this, but not
EPT.

Signed-off-by: Marcelo Tosatti <>...

8c0d577e 04/18/2010 05:22 pm Blue Swirl

kvm: avoid collision with dprintf macro in stdio.h, spotted by clang

Fixes clang errors:
CC i386-softmmu/kvm.o
/src/qemu/target-i386/kvm.c:40:9: error: 'dprintf' macro redefined
In file included from /src/qemu/target-i386/kvm.c:21:
In file included from /src/qemu/qemu-common.h:27:...

457dfed6 03/13/2010 05:50 pm Andre Przywara

x86/cpuid: remove unnecessary kvm_trim function

Correct me if I am wrong, but kvm_trim looks like a really bloated
implementation of a bitwise AND. So remove this function and replace
it with the real stuff(TM).

Signed-off-by: Andre Przywara <>...

ea643051 03/04/2010 05:29 am Jan Kiszka

KVM: x86: Restrict writeback of VCPU state

Do not write nmi_pending, sipi_vector, and mpstate unless we at least go
through a reset. And TSC as well as KVM wallclocks should only be
written on full sync, otherwise we risk to drop some time on state
read-modify-write....

ea375f9a 03/04/2010 05:29 am Jan Kiszka

KVM: Rework VCPU state writeback API

This grand cleanup drops all reset and vmsave/load related
synchronization points in favor of four(!) generic hooks:

- cpu_synchronize_all_states in qemu_savevm_state_complete
(initial sync from kernel before vmsave)...

b0b1d690 03/04/2010 05:29 am Jan Kiszka

KVM: Rework of guest debug state writing

So far we synchronized any dirty VCPU state back into the kernel before
updating the guest debug state. This was a tribute to a deficite in x86
kernels before 2.6.33. But as this is an arch-dependent issue, it is
better handle in the x86 part of KVM and remove the writeback point for...

35bed8ee 03/01/2010 05:29 am Paul Brook

Move ioport.h out of cpu-all.h

Only include ioport.h where it is actually needed.

Signed-off-by: Paul Brook <>

724c6893 02/23/2010 12:16 am Anthony Liguori

Merge remote branch 'qemu-kvm/uq/master' into staging

62f734a0 02/21/2010 11:41 am Jes Sorensen

kvm: Kill CR3_CACHE feature references

Remove all references to KVM_CR3_CACHE as it was never implemented.

Signed-off-by: Jes Sorensen <>
Signed-off-by: Avi Kivity <>

4c5b10b7 02/19/2010 11:53 pm Jes Sorensen

QEMU e820 reservation patch

Hi,

Kevin and I have agreed on the approach for this one now. So here is
the latest version of the patch for QEMU, submitting e820 reservation
entries via fw_cfg.

Cheers,
Jes

Use qemu-cfg to provide the BIOS with an optional table of e820 entries....

19ccb8ea 02/03/2010 11:47 pm Jan Kiszka

KVM: x86: Fix up misreported CPU features

From qemu-kvm: Kernels before 2.6.30 misreported some essential CPU
features via KVM_GET_SUPPORTED_CPUID. Fix them up.

Signed-off-by: Jan Kiszka <>

aee028b9 02/03/2010 11:47 pm Jan Kiszka

KVM: Request setting of nmi_pending and sipi_vector

The final version of VCPU events in 2.6.33 will allow to skip
nmi_pending and sipi_vector on KVM_SET_VCPU_EVENTS. For now let's write
them unconditionally, which is unproblematic for upstream due to missing...

bb0300dc 01/14/2010 01:14 am Gleb Natapov

Add KVM paravirt cpuid leaf

Initialize KVM paravirt cpuid leaf and allow user to control guest
visible PV features through -cpu flag.

Signed-off-by: Gleb Natapov <>
Signed-off-by: Anthony Liguori <>

e73223a5 01/11/2010 05:56 pm Gleb Natapov

remove pending exception on vcpu reset.

Without this qemu can even start on kvm modules with events support
since default value of exception_injected in zero and this is #DE
exception.

Signed-off-by: Gleb Natapov <>
Signed-off-by: Anthony Liguori <>

31827373 12/18/2009 07:26 pm Jan Kiszka

kvm: x86: Use separate exception_injected CPUState field

Marcelo correctly remarked that there are usage conflicts between QEMU
core code and KVM /wrt exception_index. So spend a separate field and
also save/restore it properly.

Signed-off-by: Jan Kiszka <>...

1a03675d 12/12/2009 03:59 pm Glauber Costa

v2: properly save kvm system time msr registers

Currently, the msrs involved in setting up pvclock are not saved over
migration and/or save/restore. This patch puts their value in special
fields in our CPUState, and deal with them using vmstate.

kvm also has to account for it, by including them in the msr list...

6fb6d245 12/07/2009 04:45 pm Jan Kiszka

kvm: x86: Fix initial kvm_has_msr_star

KVM_GET_MSR_INDEX_LIST returns -E2BIG when the provided space is too
small for all MSRs. But this is precisely the error we trigger with the
initial request in order to obtain that size. Do not fail in that case.

This caused a subtle corruption of the guest state as MSR_STAR was not...

a0fb002c 12/03/2009 11:25 pm Jan Kiszka

kvm: x86: Add support for VCPU event states

This patch extends the qemu-kvm state sync logic with support for
KVM_GET/SET_VCPU_EVENTS, giving access to yet missing exception,
interrupt and NMI states.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Anthony Liguori <>

5a2e3c2e 12/03/2009 11:25 pm Jan Kiszka

kvm: x86: Fix merge artifact of f8d926e9 about mp_state

Signed-off-by: Jan Kiszka <>
Signed-off-by: Anthony Liguori <>

caa5af0f 11/17/2009 04:49 pm Jan Kiszka

kvm: Add arch reset handler

Will be required by succeeding changes.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Anthony Liguori <>

0e607a80 11/17/2009 04:49 pm Jan Kiszka

kvm: x86: Refactor use of interrupt_bitmap

Drop interrupt_bitmap from the cpustate and solely rely on the integer
interupt_injected. This prepares us for the new injected-interrupt
interface, which will deprecate the bitmap, while preserving
compatibility....

9bdbe550 11/12/2009 07:23 pm Hollis Blanchard

kvm: Move KVM mp_state accessors to i386-specific code

Unbreaks PowerPC and S390 KVM builds.

Signed-off-by: Hollis Blanchard <>
Signed-off-by: Anthony Liguori <>

38972938 09/25/2009 10:52 pm Juan Quintela

gcc wants 1st static and then const

Signed-off-by: Juan Quintela <>
Signed-off-by: Blue Swirl <>

d9db889f 07/10/2009 09:44 pm Jan Kiszka

kvm: Work around borken MSR_GET_INDEX_LIST

Allocate enough memory for KVM_GET_MSR_INDEX_LIST as older kernels shot
far beyond their limits, corrupting user space memory.

Signed-off-by: Jan Kiszka <>
Signed-off-by: Anthony Liguori <>

6c0d7ee8 06/29/2009 09:52 pm Andre Przywara

preserve the hypervisor bit while KVM trims the CPUID bits

The KVM kernel will disable all bits in CPUID which are not present in
the host. As this is mostly true for the hypervisor bit (1.ecx),
preserve its value before the trim and restore it afterwards....

6c1f42fe 06/29/2009 09:52 pm Andre Przywara

fix KVMs GET_SUPPORTED_CPUID feature usage

If we want to trim the user provided CPUID bits for KVM to be not greater
than that of the host, we should not remove the bits after we sent
them to the kernel.
This fixes the masking of features that are not present on the host by...

f8d926e9 05/22/2009 06:50 pm Jan Kiszka

kvm: x86: Save/restore KVM-specific CPU states

Save and restore all so far neglected KVM-specific CPU states. Handling
the TSC stabilizes migration in KVM mode. The interrupt_bitmap and
mp_state are currently unused, but will become relevant for in-kernel...

76ae317f 05/20/2009 05:12 pm Mark McLoughlin

kvm: work around supported cpuid ioctl() brokenness

KVM_GET_SUPPORTED_CPUID has been known to fail to return -E2BIG
when it runs out of entries. Detect this by always trying again
with a bigger table if the ioctl() fills the table.

Signed-off-by: Mark McLoughlin <>