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The --bios argument is added as an alternative to the kernel positional argument. The BIOS runs in unreal mode (16-bit cs selector set to the end of 32-bit address space), which matches the default state KVM puts the segment and data registers into. Example usage: Build u-boot with "make qemu-x86_defconfig && make" Run crosvm with "crosvm_wrapper.sh run --bios=u-boot.rom" This produces the following message: """ U-Boot 2019.01-00017-gdc76aabe6a-dirty (May 21 2019 - 12:17:02 -0700) CPU: DRAM: 16 MiB unable to get online cpu number: -19 Warning: MP init failure Model: QEMU x86 (I440FX) Net: No ethernet found. error: can't find etc/table-loader Hit any key to stop autoboot: 0 => """ At this point the u-boot shell works with stdin/stdout, but virtual disks passed with --rwdisk weren't immediately visible from running "virtio scan" and "virtio info". This change puts the bios loading together with the linux kernel loading code since there is a lot of overlap in functionality. Bug: b/133358982 Test: ./crosvm_wrapper.sh run --mem=4097 --bios=u-boot.rom Change-Id: I65b0e1044233af662a642c592d35b106217f3c13 Reviewed-on: https://chromium-review.googlesource.com/1622648 Commit-Ready: Daniel Verkamp <dverkamp@chromium.org> Tested-by: Daniel Verkamp <dverkamp@chromium.org> Tested-by: kokoro <noreply+kokoro@google.com> Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org> Reviewed-by: Daniel Verkamp <dverkamp@chromium.org> |
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| .. | ||
| src | ||
| build.rs | ||
| Cargo.toml | ||
| host_cpuid.c | ||