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Re: [Qemu-arm] [Qemu-devel] [PATCH 11/13] target/arm/cpu64: max cpu: Int
From: |
Markus Armbruster |
Subject: |
Re: [Qemu-arm] [Qemu-devel] [PATCH 11/13] target/arm/cpu64: max cpu: Introduce sve-vls-map |
Date: |
Mon, 13 May 2019 17:25:23 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/26.1 (gnu/linux) |
Andrew Jones <address@hidden> writes:
> Introduce another cpu property to control SVE vector lengths,
> sve-vls-map, which allows the user to explicitly select the
> set of vector lengths the guest can use. The map must conform
> to QEMU's limits and architectural constraints, checked when
> the property is set. Inconsistencies with sve-max-vq are also
> checked. The bit number of a set bit in the map represents the
> allowed vector length in number of quadwords.
>
> Note, as the map is implemented with a single 64-bit word we
> currently only support up to 8192-bit vectors. As QEMU and
> KVM only support up to 2048-bit vectors then this sufficient
> now, and probably for some time. Extending the bitmap beyond
> a single word will likely require changing the property to
> a string and adding yet another parser to QEMU.
>
> Signed-off-by: Andrew Jones <address@hidden>
Please add an example of how the new property should be used on the
command line to your commit message. I'd ask for a documentation update
as well if we had any to update.
- Re: [Qemu-arm] [Qemu-devel] [PATCH 05/13] target/arm/kvm: Add kvm_arch_get/put_sve, (continued)
- [Qemu-arm] [PATCH 03/13] HACK: linux header update, Andrew Jones, 2019/05/12
- [Qemu-arm] [PATCH 11/13] target/arm/cpu64: max cpu: Introduce sve-vls-map, Andrew Jones, 2019/05/12
- Re: [Qemu-arm] [PATCH 11/13] target/arm/cpu64: max cpu: Introduce sve-vls-map, Dave Martin, 2019/05/13
- Re: [Qemu-arm] [Qemu-devel] [PATCH 11/13] target/arm/cpu64: max cpu: Introduce sve-vls-map, Andrew Jones, 2019/05/13
- Re: [Qemu-arm] [Qemu-devel] [PATCH 11/13] target/arm/cpu64: max cpu: Introduce sve-vls-map, Dave Martin, 2019/05/13
- Re: [Qemu-arm] [Qemu-devel] [PATCH 11/13] target/arm/cpu64: max cpu: Introduce sve-vls-map, Andrew Jones, 2019/05/13
- Re: [Qemu-arm] [Qemu-devel] [PATCH 11/13] target/arm/cpu64: max cpu: Introduce sve-vls-map, Dave Martin, 2019/05/13
- Re: [Qemu-arm] [Qemu-devel] [PATCH 11/13] target/arm/cpu64: max cpu: Introduce sve-vls-map, Andrew Jones, 2019/05/13
- Re: [Qemu-arm] [Qemu-devel] [PATCH 11/13] target/arm/cpu64: max cpu: Introduce sve-vls-map, Dave Martin, 2019/05/13
Re: [Qemu-arm] [Qemu-devel] [PATCH 11/13] target/arm/cpu64: max cpu: Introduce sve-vls-map,
Markus Armbruster <=
[Qemu-arm] [PATCH 08/13] target/arm/monitor: Add query-sve-vector-lengths, Andrew Jones, 2019/05/12
Re: [Qemu-arm] [PATCH 00/13] target/arm/kvm: enable SVE in guests, Peter Maydell, 2019/05/13
Re: [Qemu-arm] [PATCH 00/13] target/arm/kvm: enable SVE in guests, Andrea Bolognani, 2019/05/13