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Date: Thu, 19 Mar 2020 16:33:39 -0400
From: "Jon Mason" <jdmason@kudzu.us>
To: meta-arm@lists.yoctoproject.org
Subject: Re: [meta-arm] [PATCH] foundation: disable Scalable Vector Extension (SVE)
Message-ID: <20200319203338.GD27467@kudzu.us>
References: <20200318120146.24154-1-rahul.singh@arm.com>
 <6540BF0E-DAF6-4BEE-AA99-AC6FBE4D96AE@arm.com>
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On Thu, Mar 19, 2020 at 08:02:43AM +0000, Bertrand Marquis wrote:
> 
> 
> On 18 Mar 2020, at 12:01, Rahul Singh via Lists.Yoctoproject.Org<http://Lists.Yoctoproject.Org> <rahul.singh=arm.com@lists.yoctoproject.org<mailto:rahul.singh=arm.com@lists.yoctoproject.org>> wrote:
> 
> When foundation platform is booted with SVE enabled in linux
> kernel and with Xen hypervisor, linux kernel is stopped by a
> trap catched by Xen during early boot as Xen is configuring
> the coprocessor to trap access to SVE to EL2.Disabling the SVE
> in foundation to boot the guest and host.

Applied to the master branch of meta-arm.

Thanks,
Jon

> 
> Change-Id: I862540a46686f1fb5343a3143da61db6073bb1d3
> Signed-off-by: Rahul Singh <rahul.singh@arm.com<mailto:rahul.singh@arm.com>>
> ---
> .../recipes-devtools/fvp-common/files/start-foundation-armv8.sh | 2 ++
> 1 file changed, 2 insertions(+)
> 
> diff --git a/meta-arm-bsp/recipes-devtools/fvp-common/files/start-foundation-armv8.sh b/meta-arm-bsp/recipes-devtools/fvp-common/files/start-foundation-armv8.sh
> index 1df4fd8..e014124 100755
> --- a/meta-arm-bsp/recipes-devtools/fvp-common/files/start-foundation-armv8.sh
> +++ b/meta-arm-bsp/recipes-devtools/fvp-common/files/start-foundation-armv8.sh
> @@ -41,9 +41,11 @@ FOUNDATION_PLAT_EXE="Foundation_Platform"
> 
> # Foundation Platform arguments
> # 4 cores
> +# Disable Scalable Vector Extension (SVE)
> # gicv3 emulation (required for hardware virtualisation)
> FOUNDATION_PLAT_ARGS=" \
>     --cores=4 \
> +    --no-sve \
>     --gicv3"
> 
> # Foundation Platform user arguments
> --
> 2.17.1
> 
> 
> Reviewed-by: Bertrand Marquis <bertrand.marquis@arm.com<mailto:bertrand.marquis@arm.com>>
> 

>