[edk2-devel] [RFC PATCH v2 34/44] UefiCpuPkg/MpInitLib: Update CPU MP data with a flag to indicate if SEV-ES is active
Lendacky, Thomas
thomas.lendacky at amd.com
Thu Sep 19 19:53:02 UTC 2019
From: Tom Lendacky <thomas.lendacky at amd.com>
BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=2198
When starting APs in an SMP configuration, the AP needs to know if it is
running as an SEV-ES guest in order to assign a GHCB page.
Add a field to the CPU_MP_DATA structure that will indicate if SEV-ES is
active. This new field is set during MP library initialization with the
PCD value PcdSevEsActive. This flag can then be used to determine if
SEV-ES is active.
Cc: Eric Dong <eric.dong at intel.com>
Cc: Ray Ni <ray.ni at intel.com>
Cc: Laszlo Ersek <lersek at redhat.com>
Signed-off-by: Tom Lendacky <thomas.lendacky at amd.com>
---
UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf | 1 +
UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf | 1 +
UefiCpuPkg/Library/MpInitLib/MpLib.h | 2 ++
UefiCpuPkg/Library/MpInitLib/MpLib.c | 1 +
4 files changed, 5 insertions(+)
diff --git a/UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf b/UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf
index 37b3f64e578a..557507e9a466 100644
--- a/UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf
+++ b/UefiCpuPkg/Library/MpInitLib/DxeMpInitLib.inf
@@ -68,4 +68,5 @@ [Pcd]
gUefiCpuPkgTokenSpaceGuid.PcdCpuApLoopMode ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuApTargetCstate ## SOMETIMES_CONSUMES
gEfiMdeModulePkgTokenSpaceGuid.PcdCpuStackGuard ## CONSUMES
+ gEfiMdeModulePkgTokenSpaceGuid.PcdSevEsActive ## CONSUMES
diff --git a/UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf b/UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf
index 82b77b63ea87..f26ffd5a2ef5 100644
--- a/UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf
+++ b/UefiCpuPkg/Library/MpInitLib/PeiMpInitLib.inf
@@ -59,6 +59,7 @@ [Pcd]
gUefiCpuPkgTokenSpaceGuid.PcdCpuMicrocodePatchRegionSize ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuApLoopMode ## CONSUMES
gUefiCpuPkgTokenSpaceGuid.PcdCpuApTargetCstate ## SOMETIMES_CONSUMES
+ gEfiMdeModulePkgTokenSpaceGuid.PcdSevEsActive ## CONSUMES
[Guids]
gEdkiiS3SmmInitDoneGuid
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.h b/UefiCpuPkg/Library/MpInitLib/MpLib.h
index 107872b3679c..1dfe9a9cd756 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.h
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.h
@@ -260,6 +260,8 @@ struct _CPU_MP_DATA {
// driver.
//
BOOLEAN WakeUpByInitSipiSipi;
+
+ BOOLEAN SevEsActive;
};
extern EFI_GUID mCpuInitMpLibHobGuid;
diff --git a/UefiCpuPkg/Library/MpInitLib/MpLib.c b/UefiCpuPkg/Library/MpInitLib/MpLib.c
index d6f84c6f45c0..3e20900ec7bc 100644
--- a/UefiCpuPkg/Library/MpInitLib/MpLib.c
+++ b/UefiCpuPkg/Library/MpInitLib/MpLib.c
@@ -1657,6 +1657,7 @@ MpInitLibInitialize (
CpuMpData->MicrocodePatchAddress = OldCpuMpData->MicrocodePatchAddress;
}
InitializeSpinLock(&CpuMpData->MpLock);
+ CpuMpData->SevEsActive = PcdGetBool (PcdSevEsActive);
//
// Make sure no memory usage outside of the allocated buffer.
--
2.17.1
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