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Re: [Xen-devel] [PATCH 0/6] MSI-INTx interrupt translation for HVM
| To: | Shohei Fujiwara <fujiwara-sxa@xxxxxxxxxxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [PATCH 0/6] MSI-INTx interrupt translation for HVM |
| From: | Keir Fraser <keir.fraser@xxxxxxxxxxxxx> |
| Date: | Mon, 02 Mar 2009 08:47:53 +0000 |
| Cc: | "xen-devel@xxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxx>, Qing He <qing.he@xxxxxxxxx> |
| Delivery-date: | Mon, 02 Mar 2009 00:48:20 -0800 |
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| Thread-topic: | [Xen-devel] [PATCH 0/6] MSI-INTx interrupt translation for HVM |
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On 02/03/2009 07:19, "Shohei Fujiwara" <fujiwara-sxa@xxxxxxxxxxxxxxx> wrote:
> Today, I found the hypervisor issues EOI ASAP. So Qing's explanation
> reflected the implementation of the hypervisor.
>
> xen/drivers/passthrough/io.c:
> void hvm_dirq_assist(struct vcpu *v)
> {
> ...
> if ( hvm_irq_dpci->mirq[irq].flags & HVM_IRQ_DPCI_TRANSLATE )
> {
> /* for translated MSI to INTx interrupt, eoi as early as
> possible */
> __msi_pirq_eoi(d, irq);
> }
Ah, well the passthrough-specific logic is not something I'm so familiar
with! That above code indeed doesn't look correct. :-)
-- Keir
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