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From: "Kubacki, Michael A" <michael.a.kubacki@intel.com>
To: devel@edk2.groups.io
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Laszlo Ersek <lersek@redhat.com>,
	Liming Gao <liming.gao@intel.com>,
	Jordan Justen <jordan.l.justen@intel.com>,
	Hao A Wu <hao.a.wu@intel.com>
Subject: [PATCH V6 09/10] OvmfPkg: Disable variable runtime cache
Date: Wed, 30 Oct 2019 23:45:09 -0700	[thread overview]
Message-ID: <20191031064510.23948-10-michael.a.kubacki@intel.com> (raw)
In-Reply-To: <20191031064510.23948-1-michael.a.kubacki@intel.com>

Sets gEfiMdeModulePkgTokenSpaceGuid.PcdEnableVariableRuntimeCache
to FALSE in OvmfPkgIa32.dsc, OvmfPkgIa32X64.dsc, and OvmfPkgX64.dsc
so that when SMM_REQUIRE is TRUE, the SMM variable driver will not
use the runtime variable cache.

This is done for OvmfPkg because it currently depends upon a SMM
variable GetVariable ()implementation as a simple method to exercise
the SMM driver stack. This allows the following commands to be used
for variables such as Boot####, BootOrder, and BootNext to test SMM
timing and stability differences on the BSP (e.g. CPU#0) vs an
AP (e.g. CPU#1).
 # taskset -c 0 efibootmgr
 # taskset -c 1 efibootmgr

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Liming Gao <liming.gao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Hao A Wu <hao.a.wu@intel.com>
Signed-off-by: Michael Kubacki <michael.a.kubacki@intel.com>
---
 OvmfPkg/OvmfPkgIa32.dsc    | 1 +
 OvmfPkg/OvmfPkgIa32X64.dsc | 1 +
 OvmfPkg/OvmfPkgX64.dsc     | 1 +
 3 files changed, 3 insertions(+)

diff --git a/OvmfPkg/OvmfPkgIa32.dsc b/OvmfPkg/OvmfPkgIa32.dsc
index 05bb6ae136..d350b75630 100644
--- a/OvmfPkg/OvmfPkgIa32.dsc
+++ b/OvmfPkg/OvmfPkgIa32.dsc
@@ -431,6 +431,7 @@
 !if $(SMM_REQUIRE) == TRUE
   gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire|TRUE
   gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmEnableBspElection|FALSE
+  gEfiMdeModulePkgTokenSpaceGuid.PcdEnableVariableRuntimeCache|FALSE
 !endif
 
 [PcdsFixedAtBuild]
diff --git a/OvmfPkg/OvmfPkgIa32X64.dsc b/OvmfPkg/OvmfPkgIa32X64.dsc
index 4a75a0332e..1ef82cafe4 100644
--- a/OvmfPkg/OvmfPkgIa32X64.dsc
+++ b/OvmfPkg/OvmfPkgIa32X64.dsc
@@ -436,6 +436,7 @@
 !if $(SMM_REQUIRE) == TRUE
   gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire|TRUE
   gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmEnableBspElection|FALSE
+  gEfiMdeModulePkgTokenSpaceGuid.PcdEnableVariableRuntimeCache|FALSE
 !endif
 
 [PcdsFixedAtBuild]
diff --git a/OvmfPkg/OvmfPkgX64.dsc b/OvmfPkg/OvmfPkgX64.dsc
index ed54181180..232815c08e 100644
--- a/OvmfPkg/OvmfPkgX64.dsc
+++ b/OvmfPkg/OvmfPkgX64.dsc
@@ -436,6 +436,7 @@
 !if $(SMM_REQUIRE) == TRUE
   gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire|TRUE
   gUefiCpuPkgTokenSpaceGuid.PcdCpuSmmEnableBspElection|FALSE
+  gEfiMdeModulePkgTokenSpaceGuid.PcdEnableVariableRuntimeCache|FALSE
 !endif
 
 [PcdsFixedAtBuild]
-- 
2.16.2.windows.1


  parent reply	other threads:[~2019-10-31  6:46 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-10-31  6:45 [PATCH V6 00/10] UEFI Variable SMI Reduction Kubacki, Michael A
2019-10-31  6:45 ` [PATCH V6 01/10] MdeModulePkg/Variable: Consolidate common parsing functions Kubacki, Michael A
2019-10-31  6:45 ` [PATCH V6 02/10] MdeModulePkg/Variable: Parameterize GetNextVariableInternal () stores Kubacki, Michael A
2019-10-31  6:45 ` [PATCH V6 03/10] MdeModulePkg/Variable: Parameterize VARIABLE_INFO_ENTRY buffer Kubacki, Michael A
2019-10-31  6:45 ` [PATCH V6 04/10] MdeModulePkg/Variable: Parameterize auth status in VariableParsing Kubacki, Michael A
2019-10-31  6:45 ` [PATCH V6 05/10] MdeModulePkg/Variable: Add a file for NV variable functions Kubacki, Michael A
2019-10-31  6:45 ` [PATCH V6 06/10] MdeModulePkg VariableInfo: Always consider RT DXE and SMM stats Kubacki, Michael A
2019-10-31  6:45 ` [PATCH V6 07/10] MdeModulePkg/Variable: Add RT GetVariable() cache support Kubacki, Michael A
2019-10-31  6:45 ` [PATCH V6 08/10] MdeModulePkg/Variable: Add RT GetNextVariableName() " Kubacki, Michael A
2019-10-31  6:45 ` Kubacki, Michael A [this message]
2019-10-31  6:45 ` [PATCH V6 10/10] MdeModulePkg: Enable variable runtime cache by default Kubacki, Michael A
2019-11-01  1:32 ` [edk2-devel] [PATCH V6 00/10] UEFI Variable SMI Reduction Wang, Jian J

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