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Groups > linux.kernel > #1685782
| From | Borislav Petkov <bp@alien8.de> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH] x86/kernel/cpu/amd.c: don't apply the lahf_lm workaround in a hypervisor |
| Date | 2017-07-12 15:50 +0200 |
| Message-ID | <u2qbD-pT-3@gated-at.bofh.it> (permalink) |
| References | <u2kfT-5aW-15@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Wed, Jul 12, 2017 at 03:19:56AM -0400, Mikulas Patocka wrote:
> When I start a virtual machine, kvm complains about accesses to an unknown
> MSR ("vcpu0 unhandled rdmsr: 0xc001100d"). This is caused by the code in
> init_amd_k8 that tries to work around a BIOS bug that incorrectly sets
> lahf_lm.
No need - there are a lot of qemu configurations which cause the
unhandled MSR warning so no need to pollute the kernel unnecessarily.
The warning is harmless at that.
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
--
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[PATCH] x86/kernel/cpu/amd.c: don't apply the lahf_lm workaround in a hypervisor Mikulas Patocka <mpatocka@redhat.com> - 2017-07-12 09:30 +0200
Re: [PATCH] x86/kernel/cpu/amd.c: don't apply the lahf_lm workaround in a hypervisor Borislav Petkov <bp@alien8.de> - 2017-07-12 15:50 +0200
Re: [PATCH] x86/kernel/cpu/amd.c: don't apply the lahf_lm workaround in a hypervisor Mikulas Patocka <mpatocka@redhat.com> - 2017-07-13 04:30 +0200
Re: [PATCH] x86/kernel/cpu/amd.c: don't apply the lahf_lm workaround in a hypervisor Borislav Petkov <bp@alien8.de> - 2017-07-13 08:40 +0200
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