[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] machine check support in HVM guests
On 27/11/06 14:59, "Jan Beulich" <jbeulich@xxxxxxxxxx> wrote: >> No, I'm not saying that. I was simply expecting that it would be easy to >> fake out a very minimal machine-check emulation where nothing ever goes >> wrong. :-) If that involves GPFing on some MSR accesses, those are easy to >> inject into an HVM guest I believe. > > That wasn't my concern, I know that's simple. But the guest may not be > prepared to handle a GP fault here - after all, if CPUID says MCA is > supported, there is no reason the guest should use recovery methods > around accessing the respective MSRs. Likewise, if returning zero, the > guest may BUG(), as it may (validly) assert there's at least one bank of > MSRs supported. And so on... Then we support one bank of MSRs, store writes to those (so the contents can be read back) but do not act on the writes? I never got the impression machine check setup was very complicated. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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