KVM: x86/mmu: Set CR4.PKE/LA57 in MMU role iff long mode is active

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Don't set cr4_pke or cr4_la57 in the MMU role if long mode isn't active,
which is required for protection keys and 5-level paging to be fully
enabled.  Ignoring the bit avoids unnecessary reconfiguration on reuse,
and also means consumers of mmu_role don't need to manually check for
long mode.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210622175739.3610207-28-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2021-06-22 10:57:12 -07:00 • committed by Paolo Bonzini

parent ca8d664f50

commit 84c679f5f5

1 changed files with 4 additions and 2 deletions

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arch/x86/kvm/mmu/mmu.c

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