On Thu, 03 Oct 2019 16:46:37 +0100,
Eric Auger <eric.au...@redhat.com> wrote:
>
> Since 4.18, KVM/ARM exposes a KVM_MAX_VCPUS equal to 512. However it was
> reported [1] that a VM with more than 256 vcpus cannot be launched. 5.4
> fixes the situation with 2 patches:
> - one upgrade of the KVM_IRQ_LINE API [2] supporting a vcpu id encoded
> on 12 bits,
> - the reduction of KVM IO devices consumed by each GICv3 redistributor [3]
>
> This series uses the new KVM_IRQ_LINE API and also checks the associated
> capability (KVM_CAP_ARM_IRQ_LINE_LAYOUT_2) in machvirt.
>
> Without the series, as soon as the -smp arguments exceeds 256, QEMU exits
> with "kvm_set_irq: Invalid argument".
FWIW, and for the whole series:
Acked-by: Marc Zyngier <m...@kernel.org>
M.
--
Jazz is not dead, it just smells funny.
