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OvmfPkg/RiscVVirt/README: explain the "acpi=off" machine property 

"acpi=off" is arguably unusual with UEFI guest OSes; add a note to explain
it. Original explanation by Drew Jones.

Cc: Andrei Warkentin <andrei.warkentin@intel.com>
Cc: Andrew Jones <ajones@ventanamicro.com>
Cc: Ard Biesheuvel <ardb+tianocore@kernel.org>
Cc: Gerd Hoffmann <kraxel@redhat.com>
Cc: Jiewen Yao <jiewen.yao@intel.com>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Sunil V L <sunilvl@ventanamicro.com>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Sunil V L <sunilvl@ventanamicro.com>
This commit is contained in:
Laszlo Ersek 2023-09-13 11:08:14 +02:00 committed by mergify[bot]
parent 5242bae5dd
commit 1bfd63ac39
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OvmfPkg/RiscVVirt/README.md
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@ -70,6 +70,11 @@ Below example shows how to boot openSUSE Tumbleweed E20.
-device virtio-blk-device,drive=hd0 \ -device virtio-blk-device,drive=hd0 \
-drive file=openSUSE-Tumbleweed-RISC-V-E20-efi.riscv64.raw,format=raw,id=hd0 -drive file=openSUSE-Tumbleweed-RISC-V-E20-efi.riscv64.raw,format=raw,id=hd0
Note: the `acpi=off` machine property is specified because Linux guest
support for ACPI (that is, the ACPI consumer side) is a work in progress.
Currently, `acpi=off` is recommended unless you are developing ACPI support
yourself.
## Test with your own OpenSBI binary ## Test with your own OpenSBI binary
Using the above QEMU command line, **RISCV_VIRT_CODE.fd** is launched by the Using the above QEMU command line, **RISCV_VIRT_CODE.fd** is launched by the
OpenSBI binary that is bundled with QEMU. You can build your own OpenSBI binary OpenSBI binary that is bundled with QEMU. You can build your own OpenSBI binary