Hi Ray and Rahul, Any comment on this patch ? If you are okay with the approach then can I get Ack or R-b ?
-Brijesh On 10/22/21 11:13 PM, Brijesh Singh via groups.io wrote: > BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3275 > > Version 2 of the GHCB specification added a new VMGEXIT that the guest > could use for querying the hypervisor features. One of the immediate > users for it will be an AP creation code. When SEV-SNP is enabled, the > guest can use the newly added AP_CREATE VMGEXIT to create the APs. > > The MpInitLib will check the hypervisor feature, and if AP_CREATE is > available, it will use it. > > See GHCB spec version 2 for more details on the VMGEXIT. > > Cc: Michael Roth <michael.r...@amd.com> > Cc: Ray Ni <ray...@intel.com> > Cc: Rahul Kumar <rahul1.ku...@intel.com> > Cc: Eric Dong <eric.d...@intel.com> > Cc: James Bottomley <j...@linux.ibm.com> > Cc: Min Xu <min.m...@intel.com> > Cc: Jiewen Yao <jiewen....@intel.com> > Cc: Tom Lendacky <thomas.lenda...@amd.com> > Cc: Jordan Justen <jordan.l.jus...@intel.com> > Cc: Ard Biesheuvel <ardb+tianoc...@kernel.org> > Cc: Erdem Aktas <erdemak...@google.com> > Cc: Gerd Hoffmann <kra...@redhat.com> > Acked-by: Gerd Hoffmann <kra...@redhat.com> > Signed-off-by: Brijesh Singh <brijesh.si...@amd.com> > --- > UefiCpuPkg/UefiCpuPkg.dec | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec > index 62acb291f309..7de66fde674c 100644 > --- a/UefiCpuPkg/UefiCpuPkg.dec > +++ b/UefiCpuPkg/UefiCpuPkg.dec > @@ -396,5 +396,10 @@ [PcdsDynamic, PcdsDynamicEx] > # @Prompt SEV-ES Status > gUefiCpuPkgTokenSpaceGuid.PcdSevEsIsEnabled|FALSE|BOOLEAN|0x60000016 > > + ## This dynamic PCD contains the hypervisor features value obtained > through the GHCB HYPERVISOR > + # features VMGEXIT defined in the version 2 of GHCB spec. > + # @Prompt GHCB Hypervisor Features > + gUefiCpuPkgTokenSpaceGuid.PcdGhcbHypervisorFeatures|0x0|UINT64|0x60000018 > + > [UserExtensions.TianoCore."ExtraFiles"] > UefiCpuPkgExtra.uni -=-=-=-=-=-=-=-=-=-=-=- Groups.io Links: You receive all messages sent to this group. View/Reply Online (#82611): https://edk2.groups.io/g/devel/message/82611 Mute This Topic: https://groups.io/mt/86566145/21656 Group Owner: devel+ow...@edk2.groups.io Unsubscribe: https://edk2.groups.io/g/devel/unsub [arch...@mail-archive.com] -=-=-=-=-=-=-=-=-=-=-=-