Messages in this thread | | | From | "Kang, Luwei" <> | Subject | RE: [PATCH v1 7/8] KVM: x86: Expose PEBS feature to guest | Date | Thu, 31 Oct 2019 04:21:08 +0000 |
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> > > > Expose PEBS feature to guest by IA32_MISC_ENABLE[bit12]. > > > > IA32_MISC_ENABLE[bit12] is Processor Event Based Sampling (PEBS) > > > > Unavailable (RO) flag: > > > > 1 = PEBS is not supported; 0 = PEBS is supported. > > > > > > Why does it make sense to expose this on SVM? > > > > Thanks for the review. This patch won't expose the pebs feature to SVM and return not supported. > > AFAICT it exposes/emulates an Intel MSR on AMD, which is just weird.
I checked with the "AMD64 Architecture Programmer's Manual" and didn't found this register (IA32_MISC_ENABLE). Will move this register to vmx.c in next version.
Thanks, Luwei Kang
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