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From: "Dhaval Sharma" <dhaval@rivosinc.com>
To: devel@edk2.groups.io
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>,
Jiewen Yao <jiewen.yao@intel.com>,
Jordan Justen <jordan.l.justen@intel.com>,
Gerd Hoffmann <kraxel@redhat.com>,
Sunil V L <sunilvl@ventanamicro.com>,
Andrei Warkentin <andrei.warkentin@intel.com>,
Laszlo Ersek <lersek@redhat.com>,
Pedro Falcato <pedro.falcato@gmail.com>
Subject: [edk2-devel] [PATCH v10 5/5] OvmfPkg/RiscVVirt: Override for RISC-V CPU Features
Date: Wed, 13 Dec 2023 20:29:31 +0530
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This PCD provides a way for platform to override any
HW features that are default enabled by previous stages
of FW (like OpenSBI). For the case where previous/prev
stage has disabled the feature, this override is not
useful and its usage should be avoided.
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Sunil V L <sunilvl@ventanamicro.com>
Cc: Andrei Warkentin <andrei.warkentin@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Pedro Falcato <pedro.falcato@gmail.com>
Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
Acked-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Andrei Warkentin <andrei.warkentin@...>
---
Notes:
V10:
- Only keep CMO feature bitmask bit to disabled. Unimplemented bits
remain 1.
V8:
- Added RV tag
V7:
- Added RB tag
v6:
- Modify PCD name according to changes made in Baselib implementation
V5:
- Introduce PCD for platform
OvmfPkg/RiscVVirt/RiscVVirt.dsc.inc | 1 +
1 file changed, 1 insertion(+)
diff --git a/OvmfPkg/RiscVVirt/RiscVVirt.dsc.inc b/OvmfPkg/RiscVVirt/RiscVV=
irt.dsc.inc
index fe320525153f..a050f1ffc1d4 100644
--- a/OvmfPkg/RiscVVirt/RiscVVirt.dsc.inc
+++ b/OvmfPkg/RiscVVirt/RiscVVirt.dsc.inc
@@ -203,6 +203,7 @@ [PcdsFeatureFlag]
gEfiMdeModulePkgTokenSpaceGuid.PcdInstallAcpiSdtProtocol|TRUE=0D
=0D
[PcdsFixedAtBuild.common]=0D
+ gEfiMdePkgTokenSpaceGuid.PcdRiscVFeatureOverride|0xFFFFFFFE=0D
gEfiMdePkgTokenSpaceGuid.PcdMaximumUnicodeStringLength|1000000=0D
gEfiMdePkgTokenSpaceGuid.PcdMaximumAsciiStringLength|1000000=0D
gEfiMdePkgTokenSpaceGuid.PcdMaximumLinkedListLength|0=0D
--=20
2.39.2
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