Changeset 105670 in vbox for trunk/src/VBox/Devices/EFI/FirmwareNew/OvmfPkg/RiscVVirt/README.md

Timestamp:

Aug 14, 2024 1:16:30 PM (8 months ago)

Author:

vboxsync

svn:sync-xref-src-repo-rev:

164367

Message:

Devices/EFI/FirmwareNew: Merge edk2-stable-202405 and make it build on aarch64, bugref:4643

Location:

trunk/src/VBox/Devices/EFI/FirmwareNew

Files:

• . (modified) (1 prop)
• OvmfPkg/RiscVVirt/README.md (modified) (1 diff)

trunk/src/VBox/Devices/EFI/FirmwareNew/OvmfPkg/RiscVVirt/README.md

@@ -70 +70 @@
         -device virtio-blk-device,drive=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.
+
+3) Running QEMU with direct kernel boot
+
+    The following example boots the same guest, but loads the kernel image and
+    the initial RAM disk (which were extracted from
+    `openSUSE-Tumbleweed-RISC-V-E20-efi.riscv64.raw`) from the host filesystem.
+    It also sets the guest kernel command line on the QEMU command line.
+
+        CMDLINE=(root=UUID=76d9b92d-09e9-4df0-8262-c1a7a466f2bc
+                 systemd.show_status=1
+                 ignore_loglevel
+                 console=ttyS0
+                 earlycon=uart8250,mmio,0x10000000)
+
+        qemu-system-riscv64 \
+        -M virt,pflash0=pflash0,pflash1=pflash1,acpi=off \
+        -m 4096 -smp 2 \
+        -serial mon:stdio \
+        -device virtio-gpu-pci -full-screen \
+        -device qemu-xhci \
+        -device usb-kbd \
+        -device virtio-rng-pci \
+        -blockdev node-name=pflash0,driver=file,read-only=on,filename=RISCV_VIRT_CODE.fd \
+        -blockdev node-name=pflash1,driver=file,filename=RISCV_VIRT_VARS.fd \
+        -netdev user,id=net0 \
+        -device virtio-net-pci,netdev=net0 \
+        -device virtio-blk-device,drive=hd0 \
+        -drive file=openSUSE-Tumbleweed-RISC-V-E20-efi.riscv64.raw,format=raw,id=hd0 \
+        -kernel Image-6.5.2-1-default \
+        -initrd initrd-6.5.2-1-default \
+        -append "${CMDLINE[*]}"
+
+## Test with your own OpenSBI binary
+Using the above QEMU command lines, **RISCV_VIRT_CODE.fd** is launched by the
+OpenSBI binary that is bundled with QEMU. You can build your own OpenSBI binary
+as well:
+
+    OPENSBI_DIR=...
+    git clone https://github.com/riscv/opensbi.git $OPENSBI_DIR
+    make -C $OPENSBI_DIR \
+        -j $(getconf _NPROCESSORS_ONLN) \
+        CROSS_COMPILE=riscv64-linux-gnu- \
+        PLATFORM=generic
+
+then specify that binary for QEMU, with the following additional command line
+option:
+
+    -bios $OPENSBI_DIR/build/platform/generic/firmware/fw_dynamic.bin
+
+Note that the above only makes a difference with software emulation (which you
+can force with `-M accel=tcg`). With hardware virtualization (`-M accel=kvm`),
+KVM services the SBI (Supervisor Binary Interface) calls internally, therefore
+any OpenSBI binary specified with `-bios` is rejected.