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QEMU: Enable xsaveopt cpu feature #28

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Sep 8, 2021
Merged

QEMU: Enable xsaveopt cpu feature #28

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d723ef2
QEMU: Enable xsaveopt cpu feature
mkroening Sep 7, 2021
892be5e
Upgrade to latest QEMU
mkroening Sep 7, 2021
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4 changes: 2 additions & 2 deletions .github/workflows/x86_64.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -59,7 +59,7 @@ jobs:
- name: Install qemu (windows)
uses: crazy-max/ghaction-chocolatey@v1
with:
args: install qemu --version=2020.08.14
args: install qemu
if: ${{ matrix.os == 'windows-latest' }}
- name: Set path to qemu/nasm (Windows)
run: |
Expand All @@ -80,4 +80,4 @@ jobs:
if: ${{ matrix.os == 'windows-latest' }}
- name: Test loader
run:
qemu-system-x86_64 -display none -smp 1 -m 64M -serial stdio -kernel target/x86_64-unknown-hermit-loader/debug/rusty-loader -initrd data/x86_64/hello_world -cpu qemu64,apic,fsgsbase,rdtscp,xsave,fxsr,rdrand
qemu-system-x86_64 -display none -smp 1 -m 64M -serial stdio -kernel target/x86_64-unknown-hermit-loader/debug/rusty-loader -initrd data/x86_64/hello_world -cpu qemu64,apic,fsgsbase,rdtscp,xsave,xsaveopt,fxsr,rdrand
2 changes: 1 addition & 1 deletion README.md
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Expand Up @@ -20,7 +20,7 @@ Afterwards, the loader is stored in `target/x86_64-unknown-hermit-loader/debug/`
As final step the unikernel application `app` can be booted with following command:

```bash
$ qemu-system-x86_64 -display none -smp 1 -m 64M -serial stdio -kernel path_to_loader/rusty-loader -initrd path_to_app/app -cpu qemu64,apic,fsgsbase,rdtscp,xsave,fxsr
$ qemu-system-x86_64 -display none -smp 1 -m 64M -serial stdio -kernel path_to_loader/rusty-loader -initrd path_to_app/app -cpu qemu64,apic,fsgsbase,rdtscp,xsave,xsaveopt,fxsr
```

It is important to enable the processor features _fsgsbase_ and _rdtscp_ because it is a prerequisite to boot RustyHermit.
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