Re: kern/60144: virtio(4) cache coherence issue

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

> Date: Fri, 22 May 2026 13:48:30 +0900
> From: Tetsuya Isaki <isaki%pastel-flower.jp@localhost>
> 
> At Mon, 18 May 2026 23:29:58 +0000,
> Taylor R Campbell wrote:
> > Isaki-san: Can you verify that this patch works?
> 
> It worked with these three patches applied.  Thank you!
> - sys/arch/virt68k/virt68k/bus_dma.c,v 1.5 (I tested it on -11)
> - sys/dev/pci/ld_virtio.c (from kern/60182)
> - sys/dev/pci/virtio.c (this patch)

Great, thanks!

> By the way, one spurious interrupt has still occurred.
> 
> ...
> virtio1: allocated 24576 byte for virtqueue 0 for I/O request, size 32
> virtio1: using 16384 byte (1024 entries) indirect descriptors
> virtio1: interrupting at gfpic4 irq 2 (IPL 5)
> ld1: 8192 MB, 4161 cyl, 64 head, 63 sec, 512 bytes/sect x 16777216 sectors (0 bytes/physsect)
> Spurious interrupt on CPU ipl 5

Just to confirm, is there anything else at gfpic4 irq 2 ipl 5, or is
the interrupt definitely meant for, but not acknowledged by, virtio1?