[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [Qemu-arm] [PATCH] KVM: arm/arm64: vgic: Use a single IO device per
|
From: |
Marc Zyngier |
|
Subject: |
Re: [Qemu-arm] [PATCH] KVM: arm/arm64: vgic: Use a single IO device per redistributor |
|
Date: |
Sun, 25 Aug 2019 11:04:35 +0100 |
|
User-agent: |
Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM/1.14.9 (Gojō) APEL/10.8 EasyPG/1.0.0 Emacs/26 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) |
On Fri, 23 Aug 2019 18:33:30 +0100,
Eric Auger <address@hidden> wrote:
>
> At the moment we use 2 IO devices per GICv3 redistributor: one
> one for the RD_base frame and one for the SGI_base frame.
>
> Instead we can use a single IO device per redistributor (the 2
> frames are contiguous). This saves slots on the KVM_MMIO_BUS
> which is currently limited to NR_IOBUS_DEVS (1000).
>
> This change allows to instantiate up to 512 redistributors and may
> speed the guest boot with a large number of VCPUs.
>
> Signed-off-by: Eric Auger <address@hidden>
Yup, that's exactly what I was hoping for. A very nice cleanup, and no
need to increase NR_IOBUS_DEVS for the foreseeable future.
I've applied this to -next.
Thanks,
M.
--
Jazz is not dead, it just smells funny.