[v1] OvmfPkg: Disable PcdFirstTimeWakeUpAPsBySipi.

[edk2-devel] [PATCH] OvmfPkg: Disable PcdFirstTimeWakeUpAPsBySipi.

Yuanhao Xie posted 1 patch 8 months, 2 weeks ago

Diff against v1
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OvmfPkg/AmdSev/AmdSevX64.dsc | 7 +++++++
1 file changed, 7 insertions(+)

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[edk2-devel] [PATCH] OvmfPkg: Disable PcdFirstTimeWakeUpAPsBySipi.

Posted by Yuanhao Xie 8 months, 2 weeks ago

Deactivate PcdFirstTimeWakeUpAPsBySipi for AMD SEV and SNP to preserve
the original execution of INIT-SIPI-SIPI.

Cc: Eric Dong <eric.dong@intel.com>
Cc: Ray Ni <ray.ni@intel.com>
Cc: Rahul Kumar <rahul1.kumar@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Signed-off-by: Yuanhao Xie <yuanhao.xie@intel.com>
---
 OvmfPkg/AmdSev/AmdSevX64.dsc | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/OvmfPkg/AmdSev/AmdSevX64.dsc b/OvmfPkg/AmdSev/AmdSevX64.dsc
index 2c6ed7c974..af52438fb2 100644
--- a/OvmfPkg/AmdSev/AmdSevX64.dsc
+++ b/OvmfPkg/AmdSev/AmdSevX64.dsc
@@ -467,6 +467,13 @@
 
   gEfiMdeModulePkgTokenSpaceGuid.PcdConInConnectOnDemand|TRUE
   gUefiOvmfPkgTokenSpaceGuid.PcdBootRestrictToFirmware|TRUE
+  #
+  # PcdFirstTimeWakeUpAPsBySipi determines whether to employ
+  # SIPI instead of the INIT-SIPI-SIPI sequence during APs
+  # initialization. Deactivate this parameter for AMD SEV and
+  #  SNP to preserve the original execution of INIT-SIPI-SIPI.
+  #
+  gUefiCpuPkgTokenSpaceGuid.PcdFirstTimeWakeUpAPsBySipi|FALSE
 
 ################################################################################
 #
-- 
2.36.1.windows.1



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