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Re: [Xen-devel] [PATCH] xen: do not loose level interrupt notifications
| To: | Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH] xen: do not loose level interrupt notifications |
| From: | Keir Fraser <keir.xen@xxxxxxxxx> |
| Date: | Thu, 27 Oct 2011 13:17:16 +0100 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Stefan Bader <stefan.bader@xxxxxxxxxxxxx>, Jan Beulich <JBeulich@xxxxxxxxxx> |
| Delivery-date: | Thu, 27 Oct 2011 05:50:52 -0700 |
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| Thread-topic: | [Xen-devel] [PATCH] xen: do not loose level interrupt notifications |
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On 27/10/2011 12:42, "Stefano Stabellini" <stefano.stabellini@xxxxxxxxxxxxx> wrote: >> Is PV-HVM so different? > > Yes, it is. In the PV on HVM case we need to reassert an emulated > interrupt if the guest EOIs it without quenching the interrupt in the > ISR. > We are doing it already in the emulated code path but we are not doing > it for interrupts that have been remapped into pirqs. > > That said, if we don't care about the PV case we can simplify the patch, > I am appending a new one that only takes care of the PV on HVM case. Ah yes, when we are *emulating* an INTx line, either for an emulated device or because we are doing MSI-INTx emulation, we do have to remember to reassert. That makes sense. -- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel |
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