lkml.org 
[lkml]   [2009]   [Apr]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    Date
    From
    SubjectRe: [PATCH] Add MCE support to KVM
    Huang Ying wrote:
    >> I'm okay with an ioctl to setup MCE, but just make sure userspace has
    >> all the information to know what the kernel can do rather than the
    >> try-and-see-if-it-works approach. We can publish this information via
    >> KVM_CAP things, or via another ioctl (see KVM_GET_SUPPORTED_CPUID2 for
    >> an example).
    >>
    >
    > Yes. MCE support should be published by KVM_CAP_MCE and other features
    > can be published via reading the default value of MSR_IA32_MCG_CAP.
    >

    A problem with this is that you can only read an MSR after a vcpu has
    been created. But if you're writing a program to detect what features
    are available (for example, when checking features common to a migration
    pool), you don't want to create a vpcu (you could, but it's hacky).

    --
    I have a truly marvellous patch that fixes the bug which this
    signature is too narrow to contain.



    \
     
     \ /
      Last update: 2009-04-14 12:47    [W:0.023 / U:31.908 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site