On 07/14/20 16:27, Lendacky, Thomas wrote: > From: Tom Lendacky <thomas.lenda...@amd.com> > > BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198 > > Under SEV-ES, a CPUID intercept generates a #VC exception. VMGEXIT must be > used to allow the hypervisor to handle this intercept. > > Add support to construct the required GHCB values to support a CPUID NAE > event. Additionally, CPUID 0x0000_000d (CPUID_EXTENDED_STATE) requires > XCR0 to be supplied in the GHCB, so add support to issue the XGETBV > instruction. > > Cc: Jordan Justen <jordan.l.jus...@intel.com> > Cc: Laszlo Ersek <ler...@redhat.com> > Cc: Ard Biesheuvel <ard.biesheu...@arm.com> > Acked-by: Laszlo Ersek <ler...@redhat.com> > Signed-off-by: Tom Lendacky <thomas.lenda...@amd.com> > --- > OvmfPkg/Library/VmgExitLib/VmgExitVcHandler.c | 60 +++++++++++++++++++ > 1 file changed, 60 insertions(+)
Thanks for the comment updates, my ACK stands. Laszlo -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#62621): https://edk2.groups.io/g/devel/message/62621 Mute This Topic: https://groups.io/mt/75499834/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-
