Re: [PATCH 0/7] KVM: arm64: Fix cross-CPU vcpu pausing

[Fuad Tabba <fuad.tabba@linux.dev>]

Hi Marc,

On Thu, 15 Oct 2026 11:05:32 +0100, Marc Zyngier <maz@kernel.org> wrote:
[...]
> This series addresses these defects, and builds on top of it to:
>
> - add pausing to a single vcpu in addition to the full VM pausing
>
> - convert LPI disabling and the MOVALL command to vcpu pausing
>
> Patches on top of -rc6, most of them being Cc stable without any
> qualification (this has been broken for as long as I can remember).

I'll send a couple of nits on patches 2 and 5 as replies to those
patches.

For the series:
Reviewed-by: Fuad Tabba <fuad.tabba@linux.dev>

Tested on QEMU on top of -rc6: npVM and pVM boots in pKVM, npVM boots
with nVHE and VHE hosts, and vgic_irq and vgic_lpi_stress in all three
and with kvm-arm.mode=nested. My reproducer has vcpu 0 clear vcpu 1's
EnableLPIs while the LPI is in vcpu 1's LR: on -rc6 the LPI is still
pending on vcpu 1 afterwards, and with the series it isn't. With my
vgic-its v2 [1] on top, my MOVALL selftest and my shared LPI and DISCARD
reproducers pass, including with PROVE_LOCKING and with debug hooks
that force the DISCARD race.

Tested-by: Fuad Tabba <fuad.tabba@linux.dev>

v2 of "Fix LPI double mapping and DISCARD" [1] applies on top of this
series as it is. Would you take it as it is, or would you like me to
respin it?

Cheers,
/fuad

[1] https://lore.kernel.org/all/20261013081646.933312-1-fuad.tabba@linux.dev/