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OvmfPkg/RiscVVirt: Update README for CLANGDWARF support 

Update the README with instruction to build using CLANGDWARF
toolchain.

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: Andrei Warkentin <andrei.warkentin@intel.com>

Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
Acked-by: Ard Biesheuvel <ardb@kernel.org>
Tested-by: Ard Biesheuvel <ardb@kernel.org> # Debian clang version 14.0.6
This commit is contained in:
Sunil V L 2023-07-11 21:13:35 +05:30 committed by mergify[bot]
parent 3f49462558
commit 677f2c6f15
1 changed files with 25 additions and 3 deletions
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OvmfPkg/RiscVVirt/README.md
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@ -12,24 +12,46 @@ The minimum QEMU version required is
[7efd65423a](https://github.com/qemu/qemu/commit/7efd65423ab22e6f5890ca08ae40c84d6660242f)
which supports separate pflash devices for EDK2 code and variable storage.
## Get edk2 sources
git clone --recurse-submodule git@github.com:tianocore/edk2.git
## Build
### Using GCC toolchain
**Prerequisite**: RISC-V GNU compiler toolchain should be installed.
export WORKSPACE=`pwd`
export GCC5_RISCV64_PREFIX=riscv64-linux-gnu-
export PACKAGES_PATH=$WORKSPACE/edk2
export EDK_TOOLS_PATH=$WORKSPACE/edk2/BaseTools
source edk2/edksetup.sh
source edk2/edksetup.sh --reconfig
make -C edk2/BaseTools
source edk2/edksetup.sh BaseTools
build -a RISCV64 --buildtarget RELEASE -p OvmfPkg/RiscVVirt/RiscVVirtQemu.dsc -t GCC5
### Using CLANGDWARF toolchain (clang + lld)
**Prerequisite**: LLVM toolchain with clang and lld should be installed.
export WORKSPACE=`pwd`
export CLANGDWARF_BIN=/usr/bin/
export PACKAGES_PATH=$WORKSPACE/edk2
export EDK_TOOLS_PATH=$WORKSPACE/edk2/BaseTools
source edk2/edksetup.sh --reconfig
make -C edk2/BaseTools
source edk2/edksetup.sh BaseTools
build -a RISCV64 --buildtarget RELEASE -p OvmfPkg/RiscVVirt/RiscVVirtQemu.dsc -t CLANGDWARF
After a successful build, two files namely **RISCV_VIRT_CODE.fd** and **RISCV_VIRT_VARS.fd** are created.
## Test
Below example shows how to boot openSUSE Tumbleweed E20.
1) RISC-V QEMU pflash devices should be of of size 32MiB.
`truncate -s 32M Build/RiscVVirtQemu/RELEASE_GCC5/FV/RISCV_VIRT_CODE.fd`
`truncate -s 32M RISCV_VIRT_CODE.fd`
`truncate -s 32M Build/RiscVVirtQemu/RELEASE_GCC5/FV/RISCV_VIRT_VARS.fd`
`truncate -s 32M RISCV_VIRT_VARS.fd`
2) Running QEMU