KVM: x86: Check for host supported fields in shadow vmcs
authorBandan Das <bsd@redhat.com>
Mon, 21 Apr 2014 19:20:14 +0000 (15:20 -0400)
committerPaolo Bonzini <pbonzini@redhat.com>
Mon, 28 Apr 2014 09:14:51 +0000 (11:14 +0200)
commitfe2b201b3be91575857227da7ef21f661bc460b1
treedd1d04f0273b4cdc23d3882395e31e0d2ed4c4c2
parente8e249d78e0600cb892c87992b6c8c9ea3b301ae
KVM: x86: Check for host supported fields in shadow vmcs

We track shadow vmcs fields through two static lists,
one for read only and another for r/w fields. However, with
addition of new vmcs fields, not all fields may be supported on
all hosts. If so, copy_vmcs12_to_shadow() trying to vmwrite on
unsupported hosts will result in a vmwrite error. For example, commit
36be0b9deb23161 introduced GUEST_BNDCFGS, which is not supported
by all processors. Filter out host unsupported fields before
letting guests use shadow vmcs

Signed-off-by: Bandan Das <bsd@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/vmx.c