Anthony Liguori wrote:
Huang Ying wrote:
The related MSRs are emulated. MCE capability is exported via
extension KVM_CAP_MCE and ioctl KVM_X86_GET_MCE_CAP_SUPPORTED. A new
vcpu ioctl command KVM_X86_SETUP_MCE is used to setup MCE emulation
such as the mcg_cap. MCE is injected via vcpu ioctl command
KVM_X86_SET_MCE. Extended machine-check state (MCG_EXT_P) and CMCI are
not simulated.
Maybe I'm missing something, but couldn't this be implemented entirely
within userspace? There's nothing VT/SVM specific about this. If the
issue is setting these MSRs from userspace via KVM_SET_MSRS isn't
enough, perhaps we should add userspace MSR handling.
You also need to inject the MCE.
--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.
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