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| author | anish <anish@FreeBSD.org> | 2016-04-11 05:09:43 +0000 |
|---|---|---|
| committer | anish <anish@FreeBSD.org> | 2016-04-11 05:09:43 +0000 |
| commit | 3d3fd1fdc947b21f5c141f4fe17f9e26b0bcd592 (patch) | |
| tree | 45dabfbe72618cbf6867f69c5aabf4c4d0b7c34f /sys/amd64 | |
| parent | 7e6f8b31670ae92494f9510a48d7d589492dec6a (diff) | |
| download | FreeBSD-src-3d3fd1fdc947b21f5c141f4fe17f9e26b0bcd592.zip FreeBSD-src-3d3fd1fdc947b21f5c141f4fe17f9e26b0bcd592.tar.gz | |
Allow guest writes to AMD microcode update[0xc0010020] MSR without updating actual hardware MSR. This allows guest microcode update to go through which otherwise failing because wrmsr() was returning EINVAL.
Submitted by:Yamagi Burmeister
Approved by:grehan
MFC after:2 weeks
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/vmm/amd/svm_msr.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sys/amd64/vmm/amd/svm_msr.c b/sys/amd64/vmm/amd/svm_msr.c index 088751a..49208a3 100644 --- a/sys/amd64/vmm/amd/svm_msr.c +++ b/sys/amd64/vmm/amd/svm_msr.c @@ -156,6 +156,11 @@ svm_wrmsr(struct svm_softc *sc, int vcpu, u_int num, uint64_t val, bool *retu) * Ignore writes to the "Interrupt Pending Message" MSR. */ break; + case MSR_K8_UCODE_UPDATE: + /* + * Ignore writes to microcode update register. + */ + break; default: error = EINVAL; break; |
