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Re: [PATCH v2 6/6] hw/arm/virt: kvm: allow gicv3 by default if v2 cannot
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From: |
Richard Henderson |
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Subject: |
Re: [PATCH v2 6/6] hw/arm/virt: kvm: allow gicv3 by default if v2 cannot work |
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Date: |
Sun, 1 Mar 2020 09:58:50 -0800 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.4.1 |
On 3/1/20 2:40 AM, Eric Auger wrote:
> At the moment if the end-user does not specify the gic-version along
> with KVM acceleration, v2 is set by default. However most of the
> systems now have GICv3 and sometimes they do not support GICv2
> compatibility.
>
> This patch keeps the default v2 selection in all cases except
> in the KVM accelerated mode when either
> - the host does not support GICv2 in-kernel emulation or
> - number of VCPUS exceeds 8.
>
> Those cases did not work anyway so we do not break any compatibility.
> Now we get v3 selected in such a case.
>
> Signed-off-by: Eric Auger <address@hidden>
> Reported-by: Dr. David Alan Gilbert <address@hidden>
> ---
> hw/arm/virt.c | 14 +++++++++++++-
> 1 file changed, 13 insertions(+), 1 deletion(-)
Reviewed-by: Richard Henderson <address@hidden>
r~
- [PATCH v2 2/6] hw/arm/virt: Use VIRT_GIC_VERSION defines, (continued)
- [PATCH v2 2/6] hw/arm/virt: Use VIRT_GIC_VERSION defines, Eric Auger, 2020/03/01
- [PATCH v2 3/6] hw/arm/virt: Introduce finalize_gic_version(), Eric Auger, 2020/03/01
- [PATCH v2 4/6] target/arm/kvm: Let kvm_arm_vgic_probe() return a bitmap, Eric Auger, 2020/03/01
- [PATCH v2 5/6] hw/arm/virt: kvm: Check the chosen gic version is supported by the host, Eric Auger, 2020/03/01
- [PATCH v2 6/6] hw/arm/virt: kvm: allow gicv3 by default if v2 cannot work, Eric Auger, 2020/03/01
- Re: [PATCH v2 0/6] hw/arm/virt: kvm: allow gicv3 by default if v2 cannot work, Andrew Jones, 2020/03/02