Re: [Qemu-devel] [PATCH] qemu: msi irq allocation api

[Michael S. Tsirkin]

On Thu, May 21, 2009 at 02:23:20PM +0100, Paul Brook wrote:
> > > MSI provides multiple edge triggered interrupts, whereas traditional mode
> > > provides a single level triggered interrupt. My guess is most devices
> > > will want to treat these differently anyway.
> >
> > So, is qemu_send_msi better than qemu_set_irq.
> 
> Neither. pci_send_msi, which is a trivial wrapper around stl_phys.

I guess I'll start with that. This only works if target_phys_addr_t is
a 64 bit field (because MSI addresses are typically outside the 32 bit
memory space), I guess the simplest solution is to disable MSI if it's
not so.

-- 
MST