[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH 15/19] x86/vmce: emulate MSR_IA32_MCG_EXT_CTL
>>> On 23.02.17 at 09:54, <haozhong.zhang@xxxxxxxxx> wrote: > On 02/23/17 00:53 -0700, Jan Beulich wrote: >> >>> On 23.02.17 at 05:26, <haozhong.zhang@xxxxxxxxx> wrote: >> > On 02/22/17 08:36 -0700, Jan Beulich wrote: >> >> >>> On 17.02.17 at 07:39, <haozhong.zhang@xxxxxxxxx> wrote: >> >> All of this said - is this really a per-vCPU property, instead of a >> >> per-domain one? >> > >> > Per-vCPU. At least it can be set in the per-CPU way. Patch 16, which >> > implements the vLMCE injection, checks this per-vcpu flag when >> > injecting vMCE. If the flag is cleared, vMCE (w/ MCG_STATUS_LMCE >> > removed) will be broadcast to all vcpus. >> >> You answer my question based on the mechanics of your patches, >> but the question was from a conceptual / architectural perspective. >> > > LMCE can be enabled by SW in the per-CPU way on the real hardware, > i.e. it can be enabled on some CPUs while disabled on others. > lmce_enabled is to track whether guest SW enables LMCE on a vcpu, so > it should be a per-vcpu property. Good point. Jan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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