Messages in this thread | | | Date | Mon, 20 Apr 2009 09:52:49 +0200 | From | Gerd Hoffmann <> | Subject | Re: [PATCH] Add MCE support to KVM |
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On 04/19/09 10:33, Avi Kivity wrote: > Anthony Liguori wrote: >> Why not introduce a new exit type for MSR reads/writes that aren't >> handled by the kernel? You just need a bit on the return that >> indicates whether to GPF because of an invalid MSR access.
Yes, please.
> Right now everything in the vcpu is emulated in the kernel. Everything > else is emulated either in the kernel (irqchip) or in userspace. This > makes things easier to understand, and is more future friendly if more > cpu features become virtualized by hardware. > > While these are not compelling reasons, they at least lean the balance > in favour of a kernel implementation.
The xen pv-on-hvm drivers use an msr to indicate "please place the hypercall page here". Handling that in kernel isn't an option IMHO.
cheers, Gerd
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