KVM: vmx: Introduce handle_unexpected_vmexit and handle WAITPKG vmexit

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As the latest Intel 64 and IA-32 Architectures Software Developer's
Manual, UMWAIT and TPAUSE instructions cause a VM exit if the
RDTSC exiting and enable user wait and pause VM-execution
controls are both 1.

Because KVM never enable RDTSC exiting, the vm-exit for UMWAIT and TPAUSE
should never happen. Considering EXIT_REASON_XSAVES and
EXIT_REASON_XRSTORS is also unexpected VM-exit for KVM. Introduce a common
exit helper handle_unexpected_vmexit() to handle these unexpected VM-exit.

Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
Co-developed-by: Jingqi Liu <jingqi.liu@intel.com>
Signed-off-by: Jingqi Liu <jingqi.liu@intel.com>
Signed-off-by: Tao Xu <tao3.xu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Tao Xu 2019-07-16 14:55:51 +08:00 • committed by Paolo Bonzini

parent 6e3ba4abce

commit bf653b78f9

3 changed files with 21 additions and 17 deletions

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6

arch/x86/include/uapi/asm/vmx.h

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4

arch/x86/kvm/vmx/nested.c

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28

arch/x86/kvm/vmx/vmx.c

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