[PATCH v8 38/43] arm64: RME: Configure max SVE vector length for a Realm

[Gavin Shan]

On 4/16/25 11:42 PM, Steven Price wrote:
> From: Jean-Philippe Brucker <jean-philippe at linaro.org>
> 
> Obtain the max vector length configured by userspace on the vCPUs, and
> write it into the Realm parameters. By default the vCPU is configured
> with the max vector length reported by RMM, and userspace can reduce it
> with a write to KVM_REG_ARM64_SVE_VLS.
> 
> Signed-off-by: Jean-Philippe Brucker <jean-philippe at linaro.org>
> Signed-off-by: Steven Price <steven.price at arm.com>
> ---
> Changes since v6:
>   * Rename max_vl/realm_max_vl to vl/last_vl - there is nothing "maximum"
>     about them, we're just checking that all realms have the same vector
>     length
> ---
>   arch/arm64/kvm/guest.c |  3 ++-
>   arch/arm64/kvm/rme.c   | 42 ++++++++++++++++++++++++++++++++++++++++++
>   2 files changed, 44 insertions(+), 1 deletion(-)
> 

Reviewed-by: Gavin Shan <gshan at redhat.com>