[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] [IOEMU] Fix wrong INTx for pass-through device
On Mon, Dec 28, 2009 at 03:04:59PM +0800, Zhai, Edwin wrote: > Simon, > For the pass-through device's INTx emulation, we follow the policy: > if virtual function 0, use INTA#, otherwise use hardware value. > However, this policy only apply when bind_pt_pci_irq to xen, and > always use physical value when exporting to guest. This discrepancy > cause different INTx, thus different GSI in xen and guest, so that > interrupts never got injected to guest. E.g. when assigning a USB > controller with non-zero function(00:1d.2) to guest as 00:4.0, xen > will see INTA#, while guest see INTC#. > > This simple patch can fix it. Could you pls. review it? Hi Edwin, that seems reasonable to me. I will have time to review this more thoroughly tomorrow. > > Thanks, > > -- > best rgds, > edwin > > Signed-Off-By: Zhai Edwin <edwin.zhai@xxxxxxxxx> > > diff --git a/hw/pass-through.c b/hw/pass-through.c > index e7bd386..a08c0bf 100644 > --- a/hw/pass-through.c > +++ b/hw/pass-through.c > @@ -2710,7 +2710,8 @@ static uint32_t pt_status_reg_init(struct pt_dev *ptdev, > static uint32_t pt_irqpin_reg_init(struct pt_dev *ptdev, > struct pt_reg_info_tbl *reg, uint32_t real_offset) > { > - return ptdev->dev.config[real_offset]; > + /* Translate xen INTx value to hw */ > + return pci_intx(ptdev) + 1; > } > > /* initialize BAR */ > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxxxxxxxx > http://lists.xensource.com/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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