KVM: x86: Refactor can_emulate_instruction() return to be more expressive

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Refactor and rename can_emulate_instruction() to allow vendor code to
return more than true/false, e.g. to explicitly differentiate between
"retry", "fault", and "unhandleable".  For now, just do the plumbing, a
future patch will expand SVM's implementation to signal outright failure
if KVM attempts EMULTYPE_SKIP on an SEV guest.

No functional change intended (or rather, none that are visible to the
guest or userspace).

Link: https://lore.kernel.org/r/20230825013621.2845700-4-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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This commit is contained in:

Sean Christopherson 2023-08-24 18:36:20 -07:00

parent bc3d7c5570

commit aeb904f6b9

5 changed files with 35 additions and 29 deletions

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2

arch/x86/include/asm/kvm-x86-ops.h

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arch/x86/include/asm/kvm_host.h

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31

arch/x86/kvm/svm/svm.c

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arch/x86/kvm/vmx/vmx.c

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arch/x86/kvm/x86.c

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