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Re: [Qemu-devel] [PATCH 0/2] Generic PCIe host bridge legacy interrupts


From: Pranavkumar Sawargaonkar
Subject: Re: [Qemu-devel] [PATCH 0/2] Generic PCIe host bridge legacy interrupts routing support
Date: Fri, 17 Apr 2015 16:00:39 +0530

Hi PMM,

On 17 April 2015 at 15:23, Peter Maydell <address@hidden> wrote:
> On 17 April 2015 at 09:55, Pranavkumar Sawargaonkar
> <address@hidden> wrote:
>> This patch adds:
>> - Function to determine an irq number from qemu_irq.
>> - Function to determine and route legacy interrupts to a VM.
>
> Can you describe in more detail what this patch series
> is supposed to do, please? Interrupt routing already
> works fine, via the interrupt controller...

GPEX driver is not registering a callback to route INTx and
pci_device_route_intx_to_irq() throws a following warning
"PCI: Bug - unimplemented PCI INTx routing".
It also returns -1 as an interrupt number as well as marking it as a
disabled one.
Hence to complete the GPEX driver in terms of INTx routing I have
added this patch but at the same time routing works without this
patchset :) .

>
> thanks
> -- PMM

Thanks,
Pranav



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