KVM: VMX: Add helpers to query Intel PT mode

Browse source

Add helpers to query which of the (two) supported PT modes is active.
The primary motivation is to help document that there is a third PT mode
(host-only) that's currently not supported by KVM.  As is, it's not
obvious that PT_MODE_SYSTEM != !PT_MODE_HOST_GUEST and vice versa, e.g.
that "pt_mode == PT_MODE_SYSTEM" and "pt_mode != PT_MODE_HOST_GUEST" are
two distinct checks.

No functional change intended.

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

This commit is contained in:

Sean Christopherson 2020-03-02 15:56:22 -08:00 • committed by Paolo Bonzini

parent 0eee8f9d9d

commit 2ef7619d43

4 changed files with 34 additions and 16 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

18

arch/x86/kvm/vmx/capabilities.h

View file

2

arch/x86/kvm/vmx/nested.c

View file

26

arch/x86/kvm/vmx/vmx.c

View file

4

arch/x86/kvm/vmx/vmx.h

View file