[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v1 2/2] hvm/svm: Enable EMUL_UNIMPLEMENTED events on svm
On 05/18/2018 07:00 PM, Tamas K Lengyel wrote: > On Fri, May 18, 2018 at 9:32 AM, Jan Beulich <JBeulich@xxxxxxxx> wrote: >>>>> On 11.05.18 at 13:11, <aisaila@xxxxxxxxxxxxxxx> wrote: >>> Signed-off-by: Alexandru Isaila <aisaila@xxxxxxxxxxxxxxx> >> >> It would be helpful to know whether this patch depends on patch 1 in any way. >> If it doesn't, with Tamas'es ack this could go in independent of the other >> one. >> For conveying such information a cover letter is usually helpful. > > The two types of events are independent, you can trigger emulation > without mem_access restrictions, although that is the one mostly used. Indeed, it usually only makes sense to emulate an instruction that has caused a page fault vm_event (something that's accessing a restricted page), but it is possible to set the emulate flag when replying to a CR or MSR write event. We've waited this long to send this patch out because at least our use cases always only involve emulating as a response to page fault events (for MSR and CR writes we are only interested in being able to deny the write) - but functionally there's no reason why this patch needs to wait for the mem_access one. Thanks, Razvan _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxxx https://lists.xenproject.org/mailman/listinfo/xen-devel
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