| commit | c469268cd523245cc58255f6696e0c295485cb0b | [log] [tgz] |
|---|---|---|
| author | Paolo Bonzini <pbonzini@redhat.com> | Thu Aug 24 11:59:31 2017 +0200 |
| committer | Paolo Bonzini <pbonzini@redhat.com> | Fri Aug 25 09:28:02 2017 +0200 |
| tree | b29e228414a3b176926a4860918444d34b5565b6 | |
| parent | bb9b52bd51dcb17b965a30167d0812902c1b9927 [diff] |
KVM: x86: block guest protection keys unless the host has them enabled If the host has protection keys disabled, we cannot read and write the guest PKRU---RDPKRU and WRPKRU fail with #GP(0) if CR4.PKE=0. Block the PKU cpuid bit in that case. This ensures that guest_CR4.PKE=1 implies host_CR4.PKE=1. Fixes: 1be0e61c1f255faaeab04a390e00c8b9b9042870 Cc: stable@vger.kernel.org Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>