KVM: nVMX: Don't evaluate "emulation required" on nested VM-Exit

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Use the "internal" variants of setting segment registers when stuffing
state on nested VM-Exit in order to skip the "emulation required"
updates.  VM-Exit must always go to protected mode, and all segments are
mostly hardcoded (to valid values) on VM-Exit.  The bits of the segments
that aren't hardcoded are explicitly checked during VM-Enter, e.g. the
selector RPLs must all be zero.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210713163324.627647-30-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2021-07-13 09:33:07 -07:00 • committed by Paolo Bonzini

parent 1dd7a4f18f

commit 816be9e9be

3 changed files with 11 additions and 13 deletions

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16

arch/x86/kvm/vmx/nested.c

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6

arch/x86/kvm/vmx/vmx.c

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2

arch/x86/kvm/vmx/vmx.h

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