Re: [PATCH v8 05/12] arm/sve: save/restore SVE context switch

[Julien Grall <julien@xxxxxxx>]

Hi Luca,

On 31/05/2023 08:24, Luca Fancellu wrote:
> Save/restore context switch for SVE, allocate memory to contain
> the Z0-31 registers whose length is maximum 2048 bits each and
> FFR who can be maximum 256 bits, the allocated memory depends on
> how many bits is the vector length for the domain and how many bits
> are supported by the platform.
>
> Save P0-15 whose length is maximum 256 bits each, in this case the
> memory used is from the fpregs field in struct vfp_state,
> because V0-31 are part of Z0-31 and this space would have been
> unused for SVE domain otherwise.
>
> Create zcr_el{1,2} fields in arch_vcpu, initialise zcr_el2 on vcpu
> creation given the requested vector length and restore it on
> context switch, save/restore ZCR_EL1 value as well.
>
> List import macros from Linux in README.LinuxPrimitives.
>
> Signed-off-by: Luca Fancellu <luca.fancellu@xxxxxxx>
Acked-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall