[edk2-devel] [RFC PATCH v4 09/27] UefiCpuPkg: Define the SEV-SNP specific dynamic PCDs

Brijesh Singh via groups.io brijesh.singh=amd.com at groups.io
Mon Jun 28 17:42:05 UTC 2021

BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3275

Define the PCDs used by the MpInitLib while creating the AP when SEV-SNP
is active in the guest VM.

Cc: Ray Ni <ray.ni at intel.com>
Cc: Rahul Kumar <rahul1.kumar at intel.com>
Cc: Eric Dong <eric.dong at intel.com>
Cc: James Bottomley <jejb at linux.ibm.com>
Cc: Min Xu <min.m.xu at intel.com>
Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Tom Lendacky <thomas.lendacky at amd.com>
Cc: Jordan Justen <jordan.l.justen at intel.com>
Cc: Ard Biesheuvel <ardb+tianocore at kernel.org>
Cc: Laszlo Ersek <lersek at redhat.com>
Cc: Erdem Aktas <erdemaktas at google.com>
Signed-off-by: Brijesh Singh <brijesh.singh at amd.com>
 UefiCpuPkg/UefiCpuPkg.dec | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/UefiCpuPkg/UefiCpuPkg.dec b/UefiCpuPkg/UefiCpuPkg.dec
index 62acb291f309..0ec25871a50f 100644
--- a/UefiCpuPkg/UefiCpuPkg.dec
+++ b/UefiCpuPkg/UefiCpuPkg.dec
@@ -396,5 +396,16 @@ [PcdsDynamic, PcdsDynamicEx]
   # @Prompt SEV-ES Status
+  ## This dynamic PCD indicates whether SEV-SNP is enabled
+  #   TRUE  - SEV-SNP is enabled
+  #   FALSE - SEV-SNP is not enabled
+  # @Prompt SEV-SNP Status
+  gUefiCpuPkgTokenSpaceGuid.PcdSevSnpIsEnabled|FALSE|BOOLEAN|0x60000017
+  ## 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

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