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OvmfPkg: remove PcdCsmEnable 

PcdCsmEnable was introduced in commits 50f911d25d ("OvmfPkg: introduce
PcdCsmEnable feature flag", 2020-02-05) and 75839f977d
("OvmfPkg/PlatformPei: detect SMRAM at default SMBASE (for real)",
2020-02-05). Remove it, and substitute constant FALSE wherever it has been
evaluated thus far.

Regression test: after building OVMF IA32X64 with -D SMM_REQUIRE, and
booting it on Q35, the log still contains

> Q35SmramAtDefaultSmbaseInitialization: SMRAM at default SMBASE found

Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
https://bugzilla.tianocore.org/show_bug.cgi?id=4588
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Message-Id: <20231110235820.644381-3-lersek@redhat.com>
Reviewed-by: Jiewen Yao <Jiewen.yao@intel.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Acked-by: Corvin Köhne <corvink@FreeBSD.org>
Acked-by: Gerd Hoffmann <kraxel@redhat.com>
This commit is contained in:
Laszlo Ersek 2023-11-11 00:57:45 +01:00 committed by mergify[bot]
parent 506cc670c0
commit 3099db510e
8 changed files with 13 additions and 34 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
OvmfPkg/IntelTdx/IntelTdxX64.dsc
View File

@ -378,7 +378,6 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdInstallAcpiSdtProtocol|TRUE
!ifdef $(CSM_ENABLE)
!error "CSM is being torn down"
gUefiOvmfPkgTokenSpaceGuid.PcdCsmEnable|TRUE
!endif
!if $(SECURE_BOOT_ENABLE) == TRUE
gUefiOvmfPkgTokenSpaceGuid.PcdSecureBootSupported|TRUE

5
OvmfPkg/OvmfPkg.dec
View File

@ -497,8 +497,3 @@
## This feature flag indicates the firmware build supports secure boot.
gUefiOvmfPkgTokenSpaceGuid.PcdSecureBootSupported|FALSE|BOOLEAN|0x6d
## Informs modules (including pre-DXE-phase modules) whether the platform
# firmware contains a CSM (Compatibility Support Module).
#
gUefiOvmfPkgTokenSpaceGuid.PcdCsmEnable|FALSE|BOOLEAN|0x35

1
OvmfPkg/OvmfPkgIa32.dsc
View File

@ -473,7 +473,6 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdInstallAcpiSdtProtocol|TRUE
!ifdef $(CSM_ENABLE)
!error "CSM is being torn down"
gUefiOvmfPkgTokenSpaceGuid.PcdCsmEnable|TRUE
!endif
!if $(SMM_REQUIRE) == TRUE
gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire|TRUE

1
OvmfPkg/OvmfPkgIa32X64.dsc
View File

@ -480,7 +480,6 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdInstallAcpiSdtProtocol|TRUE
!ifdef $(CSM_ENABLE)
!error "CSM is being torn down"
gUefiOvmfPkgTokenSpaceGuid.PcdCsmEnable|TRUE
!endif
!if $(SMM_REQUIRE) == TRUE
gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire|TRUE

1
OvmfPkg/OvmfPkgX64.dsc
View File

@ -499,7 +499,6 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdInstallAcpiSdtProtocol|TRUE
!ifdef $(CSM_ENABLE)
!error "CSM is being torn down"
gUefiOvmfPkgTokenSpaceGuid.PcdCsmEnable|TRUE
!endif
!if $(SMM_REQUIRE) == TRUE
gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire|TRUE

1
OvmfPkg/OvmfXen.dsc
View File

@ -365,7 +365,6 @@
gEfiMdeModulePkgTokenSpaceGuid.PcdInstallAcpiSdtProtocol|TRUE
!ifdef $(CSM_ENABLE)
!error "CSM is being torn down"
gUefiOvmfPkgTokenSpaceGuid.PcdCsmEnable|TRUE
!endif
[PcdsFixedAtBuild]

36
OvmfPkg/PlatformPei/MemDetect.c
View File

@ -89,32 +89,22 @@ Q35SmramAtDefaultSmbaseInitialization (
)
{
RETURN_STATUS PcdStatus;
UINTN CtlReg;
UINT8 CtlRegVal;
ASSERT (PlatformInfoHob->HostBridgeDevId == INTEL_Q35_MCH_DEVICE_ID);
PlatformInfoHob->Q35SmramAtDefaultSmbase = FALSE;
if (FeaturePcdGet (PcdCsmEnable)) {
DEBUG ((
DEBUG_INFO,
"%a: SMRAM at default SMBASE not checked due to CSM\n",
__func__
));
} else {
UINTN CtlReg;
UINT8 CtlRegVal;
CtlReg = DRAMC_REGISTER_Q35 (MCH_DEFAULT_SMBASE_CTL);
PciWrite8 (CtlReg, MCH_DEFAULT_SMBASE_QUERY);
CtlRegVal = PciRead8 (CtlReg);
PlatformInfoHob->Q35SmramAtDefaultSmbase = (BOOLEAN)(CtlRegVal ==
MCH_DEFAULT_SMBASE_IN_RAM);
DEBUG ((
DEBUG_INFO,
"%a: SMRAM at default SMBASE %a\n",
__func__,
PlatformInfoHob->Q35SmramAtDefaultSmbase ? "found" : "not found"
));
}
CtlReg = DRAMC_REGISTER_Q35 (MCH_DEFAULT_SMBASE_CTL);
PciWrite8 (CtlReg, MCH_DEFAULT_SMBASE_QUERY);
CtlRegVal = PciRead8 (CtlReg);
PlatformInfoHob->Q35SmramAtDefaultSmbase = (BOOLEAN)(CtlRegVal ==
MCH_DEFAULT_SMBASE_IN_RAM);
DEBUG ((
DEBUG_INFO,
"%a: SMRAM at default SMBASE %a\n",
__func__,
PlatformInfoHob->Q35SmramAtDefaultSmbase ? "found" : "not found"
));
PcdStatus = PcdSetBoolS (
PcdQ35SmramAtDefaultSmbase,

1
OvmfPkg/PlatformPei/PlatformPei.inf
View File

@ -133,7 +133,6 @@
gUefiOvmfPkgTokenSpaceGuid.PcdOvmfSnpSecretsSize
[FeaturePcd]
gUefiOvmfPkgTokenSpaceGuid.PcdCsmEnable
gUefiOvmfPkgTokenSpaceGuid.PcdSmmSmramRequire
[Ppis]