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Re: [Qemu-devel] MSI broken?


From: Gerd Hoffmann
Subject: Re: [Qemu-devel] MSI broken?
Date: Wed, 03 Nov 2010 13:40:59 +0100
User-agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.2.9) Gecko/20100827 Red Hat/3.1.3-1.el6 Thunderbird/3.1.3

On 11/03/10 13:34, Isaku Yamahata wrote:
On Wed, Nov 03, 2010 at 12:03:15PM +0100, Gerd Hoffmann wrote:
  Hi,

What is the status if the recently merged MSI support?

I'm trying to use it to add msi support to the intel-hda driver (current
wip patch attached).  Everything works fine up to the point where it
comes to delivering the interrupt to the guest.  msi_notify pretends to
signal the guest:

msi_notify:243 intel-hda:30 notify vector 0x0 address: 0xfee01008 data:
0x4151

The guest never ever receives this interrupt though:

address@hidden ~]# grep hda /proc/interrupts
  43:          0   PCI-MSI-edge      hda_intel

Ideas anyone?

Let's track it down futher.
Were acpi_mem_writel() and apic_send_msi() in hw/apic.c called or not?

No such function in my tree (savannah/master).

Looks like some bits needed for msi are not merged yet?

cheers,
  Gerd



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