[PATCH v2 0/2] KVM: arm64: Assorted vgic fixes for 6.14
Oliver Upton
oliver.upton at linux.dev
Wed Feb 12 20:59:49 PST 2025
On Wed, Feb 12, 2025 at 06:25:56PM +0000, Marc Zyngier wrote:
> Alexander, while fuzzing KVM/arm64, found an annoying set of problems,
> all stemming from the fact that the vgic can be initialised or
> destroyed in parallel with the rest of the guest still being live.
>
> Yes, this is annoying.
>
> This second version takes a different approach at the problem,
> plugging the glaring hole we have between vgic creation and private
> interrupt allocation.
>
> Although this is more invasive, I'm more confident about this one than
> the initial version I posted a week ago.
Much better place now! Here's to the next pile of syzkaller bugs :)
Reviewed-by: Oliver Upton <oliver.upton at linux.dev>
> Alex, I'd very much appreciate your testing on this.
I too would like to see the tires kicked before we pick this up, if it
isn't too much trouble Alex.
> Marc Zyngier (2):
> KVM: arm64: timer: Drop warning on failed interrupt signalling
> KVM: arm64: vgic: Hoist SGI/PPI alloc from vgic_init() to
> kvm_create_vgic()
>
> arch/arm64/kvm/arch_timer.c | 16 ++++---
> arch/arm64/kvm/vgic/vgic-init.c | 74 ++++++++++++++++-----------------
> 2 files changed, 44 insertions(+), 46 deletions(-)
>
> --
> 2.39.2
>
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