KVM: x86: Drop .post_leave_smm(), i.e. the manual post-RSM MMU reset

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Drop the .post_leave_smm() emulator callback, which at this point is just
a wrapper to kvm_mmu_reset_context().  The manual context reset is
unnecessary, because unlike enter_smm() which calls vendor MSR/CR helpers
directly, em_rsm() bounces through the KVM helpers, e.g. kvm_set_cr4(),
which are responsible for processing side effects.  em_rsm() is already
subtly relying on this behavior as it doesn't manually do
kvm_update_cpuid_runtime(), e.g. to recognize CR4.OSXSAVE changes.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210609185619.992058-9-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2021-06-09 11:56:18 -07:00 • committed by Paolo Bonzini

parent 1270e647c8

commit 0128116550

3 changed files with 8 additions and 9 deletions

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10

arch/x86/kvm/emulate.c

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1

arch/x86/kvm/kvm_emulate.h

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arch/x86/kvm/x86.c

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