KVM: nVMX: Explicitly check for valid guest state for !unrestricted guest

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Call guest_state_valid() directly instead of querying emulation_required
when checking if L1 is attempting VM-Enter with invalid guest state.
If emulate_invalid_guest_state is false, KVM will fixup segment regs to
avoid emulation and will never set emulation_required, i.e. KVM will
incorrectly miss the associated consistency checks because the nested
path stuffs segments directly into vmcs02.

Opportunsitically add Consistency Check tracing to make future debug
suck a little less.

Fixes: 2bb8cafea8 ("KVM: vVMX: signal failure for nested VMEntry if emulation_required")
Fixes: 3184a995f7 ("KVM: nVMX: fix vmentry failure code when L2 state would require emulation")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200923184452.980-4-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Sean Christopherson 2020-09-23 11:44:48 -07:00 • committed by Paolo Bonzini

parent b89d5ad00e

commit 2ba4493a8b

3 changed files with 10 additions and 7 deletions

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2

arch/x86/kvm/vmx/nested.c

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arch/x86/kvm/vmx/vmx.c

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7

arch/x86/kvm/vmx/vmx.h

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