Radim Krčmář dc6fb79de4 KVM: x86: fix backward migration with async_PF ...

commit fe2a3027e7 upstream.

Guests on new hypersiors might set KVM_ASYNC_PF_DELIVERY_AS_PF_VMEXIT
bit when enabling async_PF, but this bit is reserved on old hypervisors,
which results in a failure upon migration.

To avoid breaking different cases, we are checking for CPUID feature bit
before enabling the feature and nothing else.

Fixes: 52a5c155cf ("KVM: async_pf: Let guest support delivery of async_pf from guest mode")
Cc: <stable@vger.kernel.org>
Reviewed-by: Wanpeng Li <wanpengli@tencent.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
[jwang: port to 4.14]
Signed-off-by: Jack Wang <jinpu.wang@profitbricks.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2018-03-11 16:23:23 +01:00

..

cpuid.c

KVM: x86: fix backward migration with async_PF

2018-03-11 16:23:23 +01:00

cpuid.h

KVM/x86: Update the reverse_cpuid list to include CPUID_7_EDX

2018-02-07 11:12:25 -08:00

debugfs.c

kvm: x86: export TSC information to user-space

2016-09-16 16:57:48 +02:00

emulate.c

KVM: x86: Make indirect calls in emulator speculation safe

2018-02-07 11:12:17 -08:00

hyperv.c

KVM: X86: implement the logic for spinlock optimization

2017-08-08 10:57:43 +02:00

hyperv.h

kvm: x86: hyperv: make VP_INDEX managed by userspace

2017-07-14 16:28:18 +02:00

i8254.c

KVM: x86: take slots_lock in kvm_free_pit

2017-07-12 22:38:26 +02:00

i8254.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

i8259.c

KVM: x86: simplify pic_ioport_read()

2017-04-12 20:17:15 +02:00

ioapic.c

KVM: x86: ioapic: Preserve read-only values in the redirection table

2018-02-03 17:38:57 +01:00

ioapic.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

irq_comm.c

KVM: x86: don't hold kvm->lock in KVM_SET_GSI_ROUTING

2017-05-02 14:45:45 +02:00

irq.c

KVM: x86: get rid of pic_irqchip()

2017-04-12 20:17:13 +02:00

irq.h

KVM: x86: don't hold kvm->lock in KVM_SET_GSI_ROUTING

2017-05-02 14:45:45 +02:00

Kconfig

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

kvm_cache_regs.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

lapic.c

KVM: x86: fix vcpu initialization with userspace lapic

2018-03-08 22:41:25 -08:00

lapic.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

Makefile

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mmu_audit.c

KVM: MMU: Add 5 level EPT & Shadow page table support.

2017-08-24 18:09:17 +02:00

mmu.c

KVM: X86: Fix SMRAM accessing even if VM is shutdown

2018-03-08 22:41:23 -08:00

mmu.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mmutrace.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

mtrr.c

KVM: x86: generalize guest_cpuid_has_ helpers

2017-08-07 16:11:50 +02:00

page_track.c

mm: introduce kv[mz]alloc helpers

2017-05-08 17:15:12 -07:00

paging_tmpl.h

KVM: x86: extend usage of RET_MMIO_PF_* constants

2018-03-08 22:41:23 -08:00

pmu_amd.c

perf/x86/amd: Make HW_CACHE_REFERENCES and HW_CACHE_MISSES measure L2

2016-09-16 16:19:49 +02:00

pmu_intel.c

KVM: x86/vPMU: fix undefined shift in intel_pmu_refresh()

2017-05-19 19:59:27 +02:00

pmu.c

KVM: x86: never specify a sample period for virtualized in_tx_cp counters

2017-03-01 14:19:46 +01:00

pmu.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

svm.c

KVM/VMX: Optimize vmx_vcpu_run() and svm_vcpu_run() by marking the RDMSR path as unlikely()

2018-03-08 22:41:24 -08:00

trace.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

tss.h

License cleanup: add SPDX GPL-2.0 license identifier to files with no license

2017-11-02 11:10:55 +01:00

vmx.c

KVM/VMX: Optimize vmx_vcpu_run() and svm_vcpu_run() by marking the RDMSR path as unlikely()

2018-03-08 22:41:24 -08:00

x86.c

KVM/x86: remove WARN_ON() for when vm_munmap() fails

2018-03-08 22:41:25 -08:00

x86.h

KVM: nVMX: Fix bug of injecting L2 exception into L1

2018-02-16 20:23:03 +01:00