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2015-09-16i386/kvm: Hyper-v crash msrs set/get'ers and migrationAndrey Smetanin
KVM Hyper-V based guests can notify hypervisor about occurred guest crash by writing into Hyper-V crash MSR's. This patch does handling and migration of HV_X64_MSR_CRASH_P0-P4, HV_X64_MSR_CRASH_CTL msrs. User can enable these MSR's by 'hv-crash' option. Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com> Signed-off-by: Denis V. Lunev <den@openvz.org> CC: Paolo Bonzini <pbonzini@redhat.com> CC: Andreas Färber <afaerber@suse.de> Message-Id: <1435924905-8926-13-git-send-email-den@openvz.org> [Folks, stop abrviating variable names!!! Also fix compilation on non-Linux/x86. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-06-12migration: Use normal VMStateDescriptions for SubsectionsJuan Quintela
We create optional sections with this patch. But we already have optional subsections. Instead of having two mechanism that do the same, we can just generalize it. For subsections we just change: - Add a needed function to VMStateDescription - Remove VMStateSubsection (after removal of the needed function it is just a VMStateDescription) - Adjust the whole tree, moving the needed function to the corresponding VMStateDescription Signed-off-by: Juan Quintela <quintela@redhat.com>
2015-06-05target-i386: use memory API to implement SMRAMPaolo Bonzini
Remove cpu_smm_register and cpu_smm_update. Instead, each CPU address space gets an extra region which is an alias of /machine/smram. This extra region is enabled or disabled as the CPU enters/exits SMM. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-26target-i386: make xmm_regs 512-bit widePaolo Bonzini
Right now, the AVX512 registers are split in many different fields: xmm_regs for the low 128 bits of the first 16 registers, ymmh_regs for the next 128 bits of the same first 16 registers, zmmh_regs for the next 256 bits of the same first 16 registers, and finally hi16_zmm_regs for the full 512 bits of the second 16 bit registers. This makes it simple to move data in and out of the xsave region, but would be a nightmare for a hypothetical TCG implementation and leads to a proliferation of [XYZ]MM_[BWLSQD] macros. Instead, this patch marshals data manually from the xsave region to a single 32x512-bit array, simplifying the macro jungle and clarifying which bits are in which vmstate subsection. The migration format is unaffected. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2015-01-26target-i386: use vmstate_offset_sub_array for AVX registersPaolo Bonzini
After the next patch, each vmstate field will extract parts of a larger (32x512-bit) array, so we cannot check the vmstate field against the type of the array. While changing this, change the macros to accept the index of the first element (which will not be 0 for Hi16_ZMM_REGS) instead of the number of elements (which is always CPU_NB_REGS). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-12-15target-i386: get/set/migrate XSAVES stateWanpeng Li
Add xsaves related definition, it also adds corresponding part to kvm_get/put, and vmstate. Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-10-24target-i386: add Intel AVX-512 supportChao Peng
Add AVX512 feature bits, register definition and corresponding xsave/vmstate support. Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-09-18target-i386: update fp status fixPavel Dovgalyuk
This patch introduces cpu_set_fpuc() function, which changes fpuc field of the CPU state and calls update_fp_status() function. These calls update status of softfloat library and prevent bugs caused by non-coherent rounding settings of the FPU and softfloat. v2 changes: * Added missed calls and intoduced setter function (as suggested by TeLeMan) Reviewed-by: TeLeMan <geleman@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
2014-08-25x86: Use common variable range MTRR countsAlex Williamson
We currently define the number of variable range MTRR registers as 8 in the CPUX86State structure and vmstate, but use MSR_MTRRcap_VCNT (also 8) to report to guests the number available. Change this to use MSR_MTRRcap_VCNT consistently. Signed-off-by: Alex Williamson <alex.williamson@redhat.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com> Cc: qemu-stable@nongnu.org Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-25target-i386: block migration and savevm if invariant tsc is exposedMarcelo Tosatti
Invariant TSC documentation mentions that "invariant TSC will run at a constant rate in all ACPI P-, C-. and T-states". This is not the case if migration to a host with different TSC frequency is allowed, or if savevm is performed. So block migration/savevm. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> [AF+mtosatti: Updated error message] Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-06-16savevm: Remove all the unneeded version_minimum_id_old (x86)Juan Quintela
After previous Peter patch, they are redundant. This way we don't assign them except when needed. Once there, there were lots of case where the ".fields" indentation was wrong: .fields = (VMStateField []) { and .fields = (VMStateField []) { Change all the combinations to: .fields = (VMStateField[]){ The biggest problem (appart from aesthetics) was that checkpatch complained when we copy&pasted the code from one place to another. Signed-off-by: Juan Quintela <quintela@redhat.com> Acked-by: Alexey Kardashevskiy <aik@ozlabs.ru> Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
2014-05-21target-i386: get CPL from SS.DPLPaolo Bonzini
CS.RPL is not equal to the CPL in the few instructions between setting CR0.PE and reloading CS. We get this right in the common case, because writes to CR0 do not modify the CPL, but it would not be enough if an SMI comes exactly during that brief period. Were this to happen, the RSM instruction would erroneously set CPL to the low two bits of the real-mode selector; and if they are not 00, the next instruction fetch cannot access the code segment and causes a triple fault. However, SS.DPL *is* always equal to the CPL. In real processors (AMD only) there is a weird case of SYSRET setting SS.DPL=SS.RPL from the STAR register while forcing CPL=3, but we do not emulate that. Tested-by: Kevin O'Connor <kevin@koconnor.net> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-04-05target-i386: reorder fields in cpu/msr_hyperv_hypercall subsectionPaolo Bonzini
The subsection already exists in one well-known enterprise Linux distribution, but for some strange reason the fields were swapped when forward-porting the patch to upstream. Limit headaches for said enterprise Linux distributor when the time will come to rebase their version of QEMU. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-id: 1396452782-21473-1-git-send-email-pbonzini@redhat.com Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2014-03-13cputlb: Change tlb_flush() argument to CPUStateAndreas Färber
Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13exec: Change cpu_breakpoint_{insert,remove{,_by_ref,_all}} argumentAndreas Färber
Use CPUState. Allows to clean up CPUArchState in gdbstub. Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-03-13exec: Change cpu_watchpoint_{insert,remove{,_by_ref,_all}} argumentAndreas Färber
Use CPUState. This lets us drop a few local env usages. Signed-off-by: Andreas Färber <afaerber@suse.de>
2014-02-03kvm: add support for hyper-v timersVadim Rozenfeld
http://msdn.microsoft.com/en-us/library/windows/hardware/ff541625%28v=vs.85%29.aspx This code is generic for activating reference time counter or virtual reference time stamp counter Signed-off-by: Vadim Rozenfeld <vrozenfe@redhat.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-02-03kvm: make hyperv vapic assist page migratableVadim Rozenfeld
Signed-off-by: Vadim Rozenfeld <vrozenfe@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-02-03kvm: make hyperv hypercall and guest os id MSRs migratable.Vadim Rozenfeld
Signed-off-by: Vadim Rozenfeld <vrozenfe@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-12-12target-i386: Intel MPXLiu Jinsong
Add some MPX related definiation, and hardcode sizes and offsets of xsave features 3 and 4. It also add corresponding part to kvm_get/put_xsave, and vmstate. Signed-off-by: Liu Jinsong <jinsong.liu@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-09-20fix steal time MSR vmsd callback to proper opaque typeMarcelo Tosatti
Convert steal time MSR vmsd callback pointer to proper X86CPU type. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-08-09kvm: migrate vPMU statePaolo Bonzini
Reviewed-by: Gleb Natapov <gnatapov@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-07-25Initialize IA32_FEATURE_CONTROL MSR in reset and migrationArthur Chunqi Li
The recent KVM patch adds IA32_FEATURE_CONTROL support. QEMU needs to clear this MSR when reset vCPU and keep the value of it when migration. This patch add this feature. Signed-off-by: Arthur Chunqi Li <yzt356@gmail.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-07-23Fix real mode guest segments dpl value in savevmOrit Wasserman
Older KVM version put invalid value in the segments registers dpl field for real mode guests (0x3). This breaks migration from those hosts to hosts with unrestricted guest support. We detect it by checking CS dpl value for real mode guest and fix the dpl values of all the segment registers. Signed-off-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2013-07-23Fix real mode guest migrationOrit Wasserman
Older KVM versions save CS dpl value to an invalid value for real mode guests (0x3). This patch detect this situation when loading CPU state and set all the segments dpl to zero. This will allow migration from older KVM on host without unrestricted guest to hosts with restricted guest support. For example migration from a Penryn host (with kernel 2.6.32) to a Westmere host (for real mode guest) will fail with "kvm: unhandled exit 80000021". Signed-off-by: Orit Wasserman <owasserm@redhat.com> Reviewed-by: Juan Quintela <quintela@redhat.com> Signed-off-by: Juan Quintela <quintela@redhat.com>
2013-04-17target-i386: kvm: save/restore steal time MSRMarcelo Tosatti
Read and write steal time MSR, so that reporting is functional across migration. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-08hw: move headers to include/Paolo Bonzini
Many of these should be cleaned up with proper qdev-/QOM-ification. Right now there are many catch-all headers in include/hw/ARCH depending on cpu.h, and this makes it necessary to compile these files per-target. However, fixing this does not belong in these patches. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2013-03-12cpu: Move halted and interrupt_request fields to CPUStateAndreas Färber
Both fields are used in VMState, thus need to be moved together. Explicitly zero them on reset since they were located before breakpoints. Pass PowerPCCPU to kvmppc_handle_halt(). Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-03-12target-i386: Update VMStateDescription to X86CPUAndreas Färber
Expose vmstate_cpu as vmstate_x86_cpu and hook it up to CPUClass::vmsd. Adapt opaques and VMState fields to X86CPU. Drop cpu_{save,load}(). Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-01-15target-i386: Define DR7 bit field constantsliguang
Implicit use of dr7 bit field is a little hard to understand, so define constants for them and use them consistently. Signed-off-by: liguang <lig.fnst@cn.fujitsu.com> Signed-off-by: Andreas Färber <afaerber@suse.de>
2013-01-02Merge remote-tracking branch 'qemu-kvm/uq/master' into stagingAnthony Liguori
* qemu-kvm/uq/master: qemu-kvm/pci-assign: 64 bits bar emulation target-i386: Enabling IA32_TSC_ADJUST for QEMU KVM guest VMs Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-12-19softmmu: move include files to include/sysemu/Paolo Bonzini
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2012-12-14target-i386: Enabling IA32_TSC_ADJUST for QEMU KVM guest VMsWill Auld
CPUID.7.0.EBX[1]=1 indicates IA32_TSC_ADJUST MSR 0x3b is supported Basic design is to emulate the MSR by allowing reads and writes to the hypervisor vcpu specific locations to store the value of the emulated MSRs. In this way the IA32_TSC_ADJUST value will be included in all reads to the TSC MSR whether through rdmsr or rdtsc. As this is a new MSR that the guest may access and modify its value needs to be migrated along with the other MRSs. The changes here are specifically for recognizing when IA32_TSC_ADJUST is enabled in CPUID and code added for migrating its value. Signed-off-by: Will Auld <will.auld@intel.com> Reviewed-by: Andreas Färber <afaerber@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-29kvm: get/set PV EOI MSRMichael S. Tsirkin
Support get/set of new PV EOI MSR, for migration. Add an optional section for MSR value - send it out in case MSR was changed from the default value (0). Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2012-03-14target-i386: Don't overuse CPUStateAndreas Färber
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>
2011-10-24i386: wire up MSR_IA32_MISC_ENABLEAvi Kivity
It's needed for its default value - bit 0 specifies that "rep movs" is good 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> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-10-24kvm: support TSC deadline MSR with subsectionLiu, Jinsong
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> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-10-24Revert "kvm: support TSC deadline MSR"Marcelo Tosatti
This reverts commit bfc2455ddbb41148494a084d15777e6bed7533c3. New patch with subsections will follow. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-10-03kvm: support TSC deadline MSRLiu, Jinsong
KVM add emulation of lapic tsc deadline timer for guest. This patch is co-operation work at qemu side. Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-06-26Remove exec-all.h include directivesBlue Swirl
Most exec-all.h include directives are now useless, remove them. Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
2011-06-21kvm: fix FPU state subsectionMarcelo Tosatti
There is no need to specify version on the subsection fields. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-06-19kvm: x86: Save/restore FPU OP, IP and DPJan Kiszka
These FPU states are properly maintained by KVM but not yet by TCG. So far we unconditionally set them to 0 in the guest which may cause state corruptions, though not with modern guests. To avoid breaking backward migration, use a conditional subsection that is only written if any of the three fields is non-zero. The guest's FNINIT clears them frequently, and cleared IA32_MISC_ENABLE MSR[2] reduces the probability of non-zero values further so that this subsection is not expected to restrict migration in any common scenario. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-06-03target-i386: remove old code handling float64Aurelien Jarno
Now that target-i386 uses softfloat, floatx80 is always available and there is no need anymore to have code handling both float64 and floax80. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2011-03-22Revert "x86: Save/restore PAT MSR"Anthony Liguori
This reverts commit c995b495b9d6e60ab1e390bd398a22425d0b3c8c. From Jan Kiszka: Ouch, indeed. Moreover, CPU_SAVE_VERSION was not updated (likely the reason for the breakage). Thanks for debugging this! Anthony (or whoever), please revert this unneeded commit in qemu.git. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2011-03-16x86: Save/restore PAT MSRJan Kiszka
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-11-16Add support for async page fault to qemuGleb Natapov
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>
2010-06-28kvm: Enable XSAVE live migration supportSheng Yang
Signed-off-by: Sheng Yang <sheng@linux.intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-03-04KVM: Rework VCPU state writeback APIJan Kiszka
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) - cpu_synchronize_all_post_init in qemu_loadvm_state (writeback after vmload) - cpu_synchronize_all_post_init in main after machine init - cpu_synchronize_all_post_reset in qemu_system_reset (writeback after system reset) These writeback points + the existing one of VCPU exec after cpu_synchronize_state map on three levels of writeback: - KVM_PUT_RUNTIME_STATE (during runtime, other VCPUs continue to run) - KVM_PUT_RESET_STATE (on synchronous system reset, all VCPUs stopped) - KVM_PUT_FULL_STATE (on init or vmload, all VCPUs stopped as well) This level is passed to the arch-specific VCPU state writing function that will decide which concrete substates need to be written. That way, no writer of load, save or reset functions that interact with in-kernel KVM states will ever have to worry about synchronization again. That also means that a lot of reasons for races, segfaults and deadlocks are eliminated. cpu_synchronize_state remains untouched, just as Anthony suggested. We continue to need it before reading or writing of VCPU states that are also tracked by in-kernel KVM subsystems. Consequently, this patch removes many cpu_synchronize_state calls that are now redundant, just like remaining explicit register syncs. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2009-12-18Revert "kvm: x86: Save/restore exception_index"Anthony Liguori
This reverts commit ebbc8a3d8e76d0402f8a08c10c0f32e24715d41d. As suggested by Jan Kiszka, "It was obsoleted by d1793b836f8f123b961c613de1bb1c0c185c84cc and now saves/restores a useless field." Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
2009-12-18kvm: x86: Use separate exception_injected CPUState fieldJan Kiszka
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 <jan.kiszka@siemens.com> Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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