Acked-by: Ray Ni <ray...@intel.com> > -----Original Message----- > From: Brijesh Singh <brijesh.si...@amd.com> > Sent: Thursday, November 11, 2021 6:15 AM > To: devel@edk2.groups.io > Cc: James Bottomley <j...@linux.ibm.com>; Xu, Min M <min.m...@intel.com>; > Yao, Jiewen <jiewen....@intel.com>; > Tom Lendacky <thomas.lenda...@amd.com>; Justen, Jordan L > <jordan.l.jus...@intel.com>; Ard Biesheuvel > <ardb+tianoc...@kernel.org>; Erdem Aktas <erdemak...@google.com>; Michael > Roth <michael.r...@amd.com>; Gerd > Hoffmann <kra...@redhat.com>; Kinney, Michael D <michael.d.kin...@intel.com>; > Liming Gao > <gaolim...@byosoft.com.cn>; Liu, Zhiguang <zhiguang....@intel.com>; Ni, Ray > <ray...@intel.com>; Kumar, Rahul1 > <rahul1.ku...@intel.com>; Dong, Eric <eric.d...@intel.com>; Brijesh Singh > <brijesh.si...@amd.com>; Michael Roth > <michael.r...@amd.com> > Subject: [PATCH v12 23/32] UefiCpuPkg: add PcdGhcbHypervisorFeatures > > 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 > -- > 2.25.1
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