[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH v3.1 01/15] xen/x86: remove XENFEAT_hvm_pirqs for PVHv2 guests
On Thu, Nov 03, 2016 at 06:52:16AM -0600, Jan Beulich wrote: > >>> On 03.11.16 at 13:35, <roger.pau@xxxxxxxxxx> wrote: > > --- a/docs/misc/hvmlite.markdown > > +++ b/docs/misc/hvmlite.markdown > > @@ -75,3 +75,38 @@ info structure that's passed at boot time (field > > rsdp_paddr). > > > > Description of paravirtualized devices will come from XenStore, just as > > it's > > done for HVM guests. > > + > > +## Interrupts ## > > + > > +### Interrupts from physical devices ### > > + > > +Interrupts from physical devices are delivered using native methods, this > > is > > +done in order to take advantage of new hardware assisted virtualization > > +functions, like posted interrupts. > > Okay, that's a reason for this to be optional (iirc AMD doesn't > have posted interrupts so far), not for all the physdev ops being They do, it is called AVIC. AMD posted an RFC patch to implement that: https://lists.xenproject.org/archives/html/xen-devel/2016-09/msg01815.html And it is mentioned at page 505 in the 24593 (Rev 3.26) manual. > made not work at all. The more that I think I did point out before > that there is at least one case where interrupt delivery info > needs to be made available to Xen despite Dom0 not setting up > an IO-APIC entry, and hence a physdev op is the only way to > communicate that information. > > Jan > _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx https://lists.xen.org/xen-devel
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