KVM: nVMX: Treat eVMCS as enabled for guest iff Hyper-V is also enabled

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When querying whether or not eVMCS is enabled on behalf of the guest,
treat eVMCS as enable if and only if Hyper-V is enabled/exposed to the
guest.

Note, flows that come from the host, e.g. KVM_SET_NESTED_STATE, must NOT
check for Hyper-V being enabled as KVM doesn't require guest CPUID to be
set before most ioctls().

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Link: https://lore.kernel.org/r/20220830133737.1539624-7-vkuznets@redhat.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

This commit is contained in:

Sean Christopherson 2022-08-30 15:37:10 +02:00 • committed by Paolo Bonzini

parent 3be29eb7b5

commit 85ab071af8

4 changed files with 18 additions and 6 deletions

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3

arch/x86/kvm/vmx/evmcs.c

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arch/x86/kvm/vmx/nested.c

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arch/x86/kvm/vmx/vmx.c

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arch/x86/kvm/vmx/vmx.h

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