Re: Failing no-vgic-v3 test

[Sebastian Ott]

On Mon, 27 Oct 2025, Sascha Bischoff wrote:
> On Mon, 2025-10-27 at 12:37 +0100, Sebastian Ott wrote:
> > on an ampere altra I've got a sad selftest:
> >
> > [root@virtlab-arm11 kvm]# ./arm64/no-vgic-v3
> > Random seed: 0x6b8b4567
> > ==== Test Assertion Failure ====
> >    arm64/no-vgic-v3.c:66: handled
> >    pid=3793 tid=3793 errno=4 - Interrupted system call
> >       1  0x0000000000402feb: test_run_vcpu at no-vgic-v3.c:128
> >       2  0x000000000040214f: test_guest_no_gicv3 at no-vgic-v3.c:155
> > (discriminator 17)
> >       3   (inlined by) main at no-vgic-v3.c:174 (discriminator 17)
> >       4  0x0000ffff873eb587: ?? ??:0
> >       5  0x0000ffff873eb65f: ?? ??:0
> >       6  0x00000000004022af: _start at ??:?
> >    ICC_PMR_EL1 no read trap
> >
> > This is a guest without VGICv3 on GICv3 HW. The test expects UNDEF on
> > reg
> > access - which is not happening since:
> >
> > 3193287ddffb KVM: arm64: gic-v3: Only set ICH_HCR traps for v2-on-v3
> > or v3 guests
> I posted a fix for that the other day:
>
> https://lore.kernel.org/all/20251021094358.1963807-1-sascha.bischoff@xxxxxxx/
>
> Could you please try the fix and confirm if it works for you?

Yes, that did the trick - thanks!
Sebastian