KVM: x86: Check EMULTYPE_WRITE_PF_TO_SP before unprotecting gfn

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Don't bother unprotecting the target gfn if EMULTYPE_WRITE_PF_TO_SP is
set, as KVM will simply report the emulation failure to userspace.  This
will allow converting reexecute_instruction() to use
kvm_mmu_unprotect_gfn_instead_retry() instead of kvm_mmu_unprotect_page().

Link: https://lore.kernel.org/r/20240831001538.336683-17-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2024-08-30 17:15:31 -07:00

parent 6205257395

commit 19ab2c8be0

1 changed files with 19 additions and 9 deletions

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arch/x86/kvm/x86.c

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