Re: [kvm-unit-tests PATCH 2/4] x86: emulator.c cleanup: Use ASM_TRY for the UD_VECTOR cases

On Wed, Aug 03, 2022, Michal Luczaj wrote:

For #UD handling use ASM_TRY() instead of handle_exception().

Suggested-by: Sean Christopherson seanjc@google.com Signed-off-by: Michal Luczaj mhal@rbox.co

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I've noticed test_illegal_movbe() does not execute with KVM_FEP. Just making sure: is it intentional?

It's intentional. FEP isn't needed because KVM emulates MOVBE on #UD when it's not supported by the host, e.g. to allow migrating to an older host.

GP(EmulateOnUD | ModRM, &three_byte_0f_38_f0), GP(EmulateOnUD | ModRM, &three_byte_0f_38_f1),