Re: [PATCH RESEND 6.1 04/12] arm64/fpsimd: Stop using TIF_SVE to manage register saving in KVM

[Sasha Levin <sashal@kernel.org>]

[ Sasha's backport helper bot ]

Hi,

✅ All tests passed successfully. No issues detected.
No action required from the submitter.

The upstream commit SHA1 provided is correct: 62021cc36add7b2c015b837f7893f2fb4b8c2586

Status in newer kernel trees:
6.14.y | Present (exact SHA1)
6.13.y | Present (exact SHA1)
6.12.y | Present (exact SHA1)
6.6.y | Present (exact SHA1)

Note: The patch differs from the upstream commit:
---
1:  62021cc36add7 ! 1:  237bad63ed267 arm64/fpsimd: Stop using TIF_SVE to manage register saving in KVM
    @@ Metadata
      ## Commit message ##
         arm64/fpsimd: Stop using TIF_SVE to manage register saving in KVM
     
    +    [ Upstream commit 62021cc36add7b2c015b837f7893f2fb4b8c2586 ]
    +
         Now that we are explicitly telling the host FP code which register state
         it needs to save we can remove the manipulation of TIF_SVE from the KVM
         code, simplifying it and allowing us to optimise our handling of normal
    @@ Commit message
         Reviewed-by: Marc Zyngier <maz@kernel.org>
         Link: https://lore.kernel.org/r/20221115094640.112848-5-broonie@kernel.org
         Signed-off-by: Will Deacon <will@kernel.org>
    +    [ Mark: trivial backport ]
    +    Signed-off-by: Mark Rutland <mark.rutland@arm.com>
    +    Signed-off-by: Mark Brown <broonie@kernel.org>
     
      ## arch/arm64/kernel/fpsimd.c ##
     @@ arch/arm64/kernel/fpsimd.c: static void task_fpsimd_load(void)
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-6.6.y        |  Success    |  Success   |