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kvm: expose tsc deadline timer feature to guest
This patch exposes tsc deadline timer feature to guest if1). in-kernel irqchip is used, and2). kvm has emulated tsc deadline timer, and3). user authorize the feature exposing via cpu or +/ tsc-deadline...
target-i386: Pass X86CPU to do_cpu_{init,sipi}()
Allows to use cpu_reset() in place of cpu_state_reset().
Signed-off-by: Andreas Färber <afaerber@suse.de>Reviewed-by: Igor Mammedov <imammedo@redhat.com>
target-i386: Don't overuse CPUState
Scripted conversion: sed -i "s/CPUState/CPUX86State/g" target-i386/*.[hc] sed -i "s/#define CPUX86State/#define CPUState/" target-i386/cpu.h
Signed-off-by: Andreas Färber <afaerber@suse.de>Acked-by: Anthony Liguori <aliguori@us.ibm.com>
kvm: fill in padding to help valgrind
valgrind warns about padding fields which are passedto vcpu ioctls uninitialized.This is not an error in practice because kvm ignored padding.Since the ioctls in question are off data path andthe cost is zero anyway, initialize padding to 0...
target-i386: Add infrastructure for reporting TPR MMIO accesses
This will allow the APIC core to file a TPR access report. Depending onthe accelerator and kernel irqchip mode, it will either be deliveredright away or queued for later reporting.
In TCG mode, we can restart the triggering instruction and can therefore...
kvm: Synchronize cpu state in kvm_arch_stop_on_emulation_error()
Call to kvm_cpu_synchronize_state() is missing.kvm_arch_stop_on_emulation_error may look at outdated registers here.
Signed-off-by: Gleb Natapov <gleb@redhat.com>Signed-off-by: Avi Kivity <avi@redhat.com>...
kvm: Allow to set shadow MMU size
Introduce the KVM-specific machine option kvm_shadow_mem. It allows toset a custom shadow MMU size for the virtual machine. This is useful forstress testing e.g.
Only x86 supports this for now, but it is in principle a generic...
kvm: Implement kvm_irqchip_in_kernel like kvm_enabled
To both avoid that kvm_irqchip_in_kernel always has to be paired withkvm_enabled and that the former ends up in a function call, implement itlike the latter. This means keeping the state in a global variable and...
kvm: Introduce core services for in-kernel irqchip support
Add the basic infrastructure to active in-kernel irqchip support, injectinterrupts into these models, and maintain IRQ routes.
Routing is optional and depends on the host arch supportingKVM_CAP_IRQ_ROUTING. When it's not available on x86, we looe the HPET as...
kvm: x86: Add user space part for in-kernel APIC
This introduces the alternative APIC device which makes use of KVM'sin-kernel device model. External NMI injection via LINT1 is emulated bychecking the current state of the in-kernel APIC, only injecting a NMI...
hyper-v: initialize Hyper-V CPUID leaves.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Merge remote-tracking branch 'qemu-kvm/memory/page_desc' into staging
kvm: x86: Avoid runtime allocation of xsave buffer
Keep a per-VCPU xsave buffer for kvm_put/get_xsave instead ofcontinuously allocating and freeing it on state sync.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
kvm: x86: Drop redundant apic base and tpr update from kvm_get_sregs
The latter was already commented out, the former is redundant as well.We always get the latest changes after return from the guest viakvm_arch_post_run.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>...
kvm: x86: Use symbols for all xsave field
Field 0 (FCW+FSW) and 1 (FTW+FOP) were hard-coded so far.
kvm: switch kvm slots to use host virtual address instead of ram_addr_t
This simplifies a later switch to the memory API in slot management.
Signed-off-by: Avi Kivity <avi@redhat.com>
Fix typo: runnning -> running
One n too many for running, need we say more.
Signed-Off-By: Vagrant Cascadian <vagrant@freegeek.org>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
i386: wire up MSR_IA32_MISC_ENABLE
It's needed for its default value - bit 0 specifies that "rep movs" isgood enough for memcpy, and Linux may use a slower memcpu if it is not set,depending on cpu family/model.
Signed-off-by: Avi Kivity <avi@redhat.com>...
kvm: support TSC deadline MSR with subsection
KVM add emulation of lapic tsc deadline timer for guest.This patch is co-operation work at qemu side.
Use subsections to save/restore the field (mtosatti).
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>...
Revert "kvm: support TSC deadline MSR"
This reverts commit bfc2455ddbb41148494a084d15777e6bed7533c3.New patch with subsections will follow.
kvm: support TSC deadline MSR
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Replace the VMSTOP macros with a proper state type
Today, when notifying a VM state change with vm_state_notify(),we pass a VMSTOP macro as the 'reason' argument. This is not idealbecause the VMSTOP macros tell why qemu stopped and not exactlywhat the current VM state is....
Drop the vm_running global variable
Use runstate_is_running() instead, which is introduced by this commit.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
kvm: remove unnecessary assignments
Avoid these warnings from clang analyzer:/src/qemu/target-i386/kvm.c:772:5: warning: Value stored to 'cwd' is never read cwd = swd = twd = 0;/src/qemu/target-i386/kvm.c:772:11: warning: Although the value stored to 'swd' is used in the enclosing expression, the value is never actually read from 'swd'...
Use new macro QEMU_PACKED for packed structures
Most changes were made using these commands:
git grep -la '__attribute__((packed))'|xargs perl -pi -e 's/__attribute__\(\(packed\)\)/QEMU_PACKED/'git grep -la '__attribute__ ((packed))'|xargs perl -pi -e 's/__attribute__ \(\(packed\)\)/QEMU_PACKED/'...
Fix up some style nits of last uq/master merge
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Use glib memory allocation and free functions
qemu_malloc/qemu_free no longer exist after this commit.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Remove #ifdef KVM_CAP_TSC_CONTROL
qemu-x86: Set tsc_khz in kvm when supported
Make use of the KVM_TSC_CONTROL feature if available.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
KVM: Fix XSAVE feature bit enumeration
When iterating through the XSAVE feature enumeration CPUID leaf (0xD)we should not stop at the first zero EAX, but instead keep scanningsince there are gaps in the enumeration (ECX=1 for instance).This fixes the proper usage of AVX in KVM guests....
kvm: x86: Pass KVMState to kvm_arch_get_supported_cpuid
kvm_arch_get_supported_cpuid checks for global cpuid restrictions, itdoes not require any CPUState reference. Changing its interface allowsto call it before any VCPU is initialized.
CC: Eduardo Habkost <ehabkost@redhat.com>...
kvm: x86: Drop KVM_CAP build dependencies
No longer needed with accompanied kernel headers.
kvm: Drop CONFIG_KVM_PARA
The kvm_para.h header is now always available.
kvm: x86: Save/restore FPU OP, IP and DP
These FPU states are properly maintained by KVM but not yet by TCG. Sofar we unconditionally set them to 0 in the guest which may causestate corruptions, though not with modern guests.
To avoid breaking backward migration, use a conditional subsection that...
kvm: Add CPUID support for VIA CPU
When KVM is running on VIA CPU with host cpu's model, thefeautures of VIA CPU will be passed into kvm guest by callingthe CPUID instruction for Centaur.
Signed-off-by: BrillyWu<brillywu@viatech.com.cn>Signed-off-by: KaryJin<karyjin@viatech.com.cn>...
kvm: use qemu_free consistently
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
kvm: use kernel-provided para_features instead of statically coming up with new capabilities
Use the features provided by KVM_GET_SUPPORTED_CPUID directly tomask out features from guest-visible cpuid.
The old get_para_features() mechanism is kept for older kernels that do not implement it....
kvm: Align kvm_arch_handle_exit to kvm_cpu_exec changes
Make the return code of kvm_arch_handle_exit directly usable forkvm_cpu_exec. This is straightforward for x86 and ppc, just s390would require more work. Avoid this for now by pushing the return code...
kvm: x86: Reorder functions in kvm.c
Required for next patch which will access guest debug services fromkvm_arch_handle_exit. No functional changes.
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.
kvm: x86: Do not leave halt if interrupts are disabled
When an external interrupt is pending but IF is cleared, we must notleave the halt state prematurely.
kvm: x86: Synchronize PAT MSR with the kernel
kvm: x86: Consolidate TCG and KVM MCE injection code
This switches KVM's MCE injection path to cpu_x86_inject_mce, both forSIGBUS and monitor initiated events. This means we prepare the MCA MSRsin the VCPUState also for KVM.
We have to drop the MSRs writeback restrictions for this purpose which...
kvm: x86: Clean up kvm_setup_mce
There is nothing to abstract here. Fold kvm_setup_mce into its callerand fix up the error reporting (return code of kvm_vcpu_ioctl holds theerror value).
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>CC: Huang Ying <ying.huang@intel.com>...
kvm: x86: Fail kvm_arch_init_vcpu if MCE initialization fails
There is no reason to continue if the kernel claims to support MCE butthen fails to process our request.
KVM, MCE, unpoison memory address across reboot
In Linux kernel HWPoison processing implementation, the virtualaddress in processes mapping the error physical memory page is markedas HWPoison. So that, the further accessing to the virtualaddress will kill corresponding processes with SIGBUS....
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.
kvm: Rename kvm_arch_process_irqchip_events to async_events
We will broaden the scope of this function on x86 beyond irqchip events.
kvm: x86: Inject pending MCE events on state writeback
The current way of injecting MCE events without updating of andsynchronizing with the CPUState is broken and causes spuriouscorruptions of the MCE-related parts of the CPUState.
As a first step towards a fix, enhance the state writeback code with...
Refactor thread retrieval and check
We have qemu_cpu_self and qemu_thread_self. The latter is retrieving thecurrent thread, the former is checking for equality (using CPUState). Wealso have qemu_thread_equal which is only used like qemu_cpu_self.
This refactors the interfaces, creating qemu_cpu_is_self and...
kvm: make tsc stable over migration and machine start
If the machine is stopped, we should not record two different tsc valuesupon a save operation. The same problem happens with kvmclock.
But kvmclock is taking a different diretion, being now seen as a separate...
kvm: Separate TCG from KVM cpu execution
Mixing up TCG bits with KVM already led to problems around eflagsemulation on x86. Moreover, quite some code that TCG requires on cpuenty/exit is useless for KVM. So dispatch between tcg_cpu_exec andkvm_cpu_exec as early as possible....
kvm: x86: Prepare VCPU loop for in-kernel irqchip
Effectively no functional change yet as kvm_irqchip_in_kernel still onlyreturns 0, but this patch will allow qemu-kvm to adopt the VCPU loop ofupsteam KVM.
kvm: Drop return values from kvm_arch_pre/post_run
We do not check them, and the only arch with non-empty implementationsalways returns 0 (this is also true for qemu-kvm).
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>CC: Alexander Graf <agraf@suse.de>...
kvm: x86: Catch and report failing IRQ and NMI injections
We do not need to abort, but the user should be notified that weirdthings go on.
kvm: Provide sigbus services arch-independently
Provide arch-independent kvm_on_sigbus* stubs to remove the #ifdef'eryfrom cpus.c. This patch also fixes --disable-kvm build by providing themissing kvm_on_sigbus_vcpu kvm-stub.
kvm: Unconditionally reenter kernel after IO exits
KVM requires to reenter the kernel after IO exits in order to completeinstruction emulation. Failing to do so will leave the kernel stateinconsistently behind. To ensure that we will get back ASAP, we issue a...
Merge remote branch 'qemu-kvm/uq/master' into staging
aliguori: fix build with !defined(KVM_CAP_ASYNC_PF)
kvm: Consolidate must-have capability checks
Instead of splattering the code with #ifdefs and runtime checks forcapabilities we cannot work without anyway, provide central testinfrastructure for verifying their availability both at build andruntime.
kvm: x86: Rework identity map and TSS setup for larger BIOS sizes
In order to support loading BIOSes > 256K, reorder the code, adjustingthe base if the kernel supports moving the identity map.
kvm: x86: Implicitly clear nmi_injected/pending on reset
All CPUX86State variables before CPU_COMMON are automatically cleared onreset. Reorder nmi_injected and nmi_pending to avoid having to touchthem explicitly.
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 knowabout the related MSR. So skip it during state synchronization in thatcase. Fixes annoying kernel warnings.
kvm: x86: Align kvm_arch_put_registers code with comment
The ordering doesn't matter in this case, but better keep it consistent.
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 irqchipsupport. But qemu-kvm can already make use of it and drop its ownmp_state access services.
kvm: x86: Remove redundant mp_state initialization
kvm_arch_reset_vcpu initializes mp_state, and that function is invokedright after kvm_arch_init_vcpu.
kvm: x86: Fix xcr0 reset mismerge
For unknown reasons, xcr0 reset ended up in kvm_arch_update_guest_debugon upstream merge. Fix this and also remove the misleading comment (1 isTHE reset value).
kvm: x86: Refactor msr_star/hsave_pa setup and checks
Simplify kvm_has_msr_star/hsave_pa to booleans and push their one-timeinitialization into kvm_arch_init. Also handle potential errors of thatsetup procedure.
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 bootedguest cannot be disturbed by old values.
kvm: x86: Fix !CONFIG_KVM_PARA build
If we lack kvm_para.h, MSR_KVM_ASYNC_PF_EN is not defined. The change inkvm_arch_init_vcpu is just for consistency reasons.
kvm: Drop smp_cpus argument from init functions
No longer used.
kvm: x86: Swallow KVM_EXIT_SET_TPR
This exit only triggers activity in the common exit path, but we shouldaccept it in order to be able to detect unknown exit types.
kvm: Stop on all fatal exit reasons
Ensure that we stop the guest whenever we face a fatal or unknown exitreason. If we stop, we also have to enforce a cpu loop exit.
kvm: Improve reporting of fatal errors
Report KVM_EXIT_UNKNOWN, KVM_EXIT_FAIL_ENTRY, and KVM_EXIT_EXCEPTIONwith more details to stderr. The latter two are so far x86-only, so movethem into the arch-specific handler. Integrate the Intel real modewarning on KVM_EXIT_FAIL_ENTRY that qemu-kvm carries, but actually...
Add "broadcast" option for mce command
When the following test case is injected with mce command, maybe user could notget the expected result. DATA command cpu bank status mcg_status addr misc (qemu) mce 1 1 0xbd00000000000000 0x05 0x1234 0x8c...
Add function for checking mca broadcast of CPU
Add function for checking whether current CPU support mca broadcast.
Signed-off-by: Jin Dongming <jin.dongming@np.css.fujitsu.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
kvm: introduce kvm_mce_in_progress
Share same error handing, and rename this function afterMCIP (Machine Check In Progress) flag.
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>Signed-off-by: Jin Dongming <jin.dongming@np.css.fujitsu.com>...
kvm: kvm_mce_inj_* subroutines for templated error injections
Refactor codes for maintainability.
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>Signed-off-by: Jin Dongming <jin.dongming@np.css.fujitsu.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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,...
kvm: x86: Fix DPL write back of segment registers
The DPL is stored in the flags and not in the selector. In fact, the RPLmay differ from the DPL at some point in time, and so we were corruptingthe guest state so far.
kvm: x86: Remove obsolete SS.RPL/DPL aligment
This seems to date back to the days KVM didn't support real mode. Thecheck is no longer needed and, even worse, is corrupting the guest statein case SS.RPL != DPL.
kvm: x86: Prevent sign extension of DR7 in guest debugging mode
This unbreaks guest debugging when the 4th hardware breakpoint used forguest debugging is a watchpoint of 4 or 8 byte lenght. The 31st bit ofDR7 is set in that case and used to cause a sign extension to the high...
kvm: x86: Fix a few coding style violations
No functional changes.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>Signed-off-by: Avi Kivity <avi@redhat.com>
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 theuser space raised them. (example: qemu monitor's "nmi" command)
Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com>Acked-by: Jan Kiszka <jan.kiszka@siemens.com>...
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 <laijs@cn.fujitsu.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Add support for async page fault to qemu
Add save/restore of MSR for migration and cpuid bit.
Signed-off-by: Gleb Natapov <gleb@redhat.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
kvm: save/restore x86-64 MSRs on x86-64 kernels
kvm: writeback SMP TSCs on migration only
commit 6389c45441269baa2873e6feafebd17105ddeaf6Author: Jan Kiszka <jan.kiszka@siemens.com>Date: Mon Mar 1 18:17:26 2010 +0100
qemu-kvm: Cleanup/fix TSC and PV clock writeback
kvm: factor out kvm_has_msr_star
And add kvm_has_msr_hsave_pa(), to avoid warnings on olderkernels without support.
kvm: add save/restore of MSR_VM_HSAVE_PA
commit 2bba4446746add456ceeb0e8359a43032a2ea333Author: Alexander Graf <agraf@suse.de>Date: Thu Dec 18 15:38:32 2008 +0100
Enable nested SVM support in userspace
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...
x86, mce: broadcast mce depending on the cpu version
There is no reason why SRAO event received by the main threadis 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....
x86, mce: ignore SRAO only when MCG_SER_P is available
And restruct this block to call kvm_mce_in_exception() only when it isrequired.
Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Add svm cpuid features
This patch adds the svm cpuid feature flags to the qemuintialization path. It also adds the svm features availableon phenom to its cpu-definition and extends the host cputype to support all svm features KVM can provide.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>...
kvm: x86: add mce support
Port qemu-kvm's MCE support
commit c68b2374c9048812f488e00ffb95db66c0bc07a7Author: Huang Ying <ying.huang@intel.com>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...
MCE: Relay UCR MCE to guest
Port qemu-kvm's
commit 4b62fff1101a7ad77553147717a8bd3bf79df7efAuthor: Huang Ying <ying.huang@intel.com>Date: Mon Sep 21 10:43:25 2009 +0800
UCR (uncorrected recovery) MCE is supported in recent Intel CPUs,...
Add savevm/loadvm support for MCE
commit 1bab5d11545d8de5facf46c28630085a2f9651aeAuthor: Huang Ying <ying.huang@intel.com>Date: Wed Mar 3 16:52:46 2010 +0800
MCE registers are saved/load into/from CPUState in...
Fix memory leak in register save load due to xsave support
From: Avi Kivity <avi@redhat.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
kvm: Enable XSAVE live migration support
Signed-off-by: Sheng Yang <sheng@linux.intel.com>Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
kvm: init mp_state
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>Signed-off-by: Avi Kivity <avi@redhat.com>
kvm: Fix cpu_is_bsp() compilation warning
Signed-off-by: Sheng Yang <sheng@linux.intel.com>Signed-off-by: Avi Kivity <avi@redhat.com>