Re: [PATCH 5.10 10/14] arm64: proton-pack: Expose whether the branchy loop k value

[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: a1152be30a043d2d4dcb1683415f328bf3c51978

WARNING: Author mismatch between patch and upstream commit:
Backport author: Pu Lehui<pulehui@huaweicloud.com>
Commit author: James Morse<james.morse@arm.com>

Status in newer kernel trees:
6.15.y | Present (exact SHA1)
6.14.y | Present (different SHA1: 00565e8c0860)
6.12.y | Present (different SHA1: f2aebb8ec64d)
6.6.y | Present (different SHA1: 73591041a551)
6.1.y | Present (different SHA1: 497771234133)
5.15.y | Not found

Note: The patch differs from the upstream commit:
---
1:  a1152be30a043 ! 1:  dbc31c5fa6e85 arm64: proton-pack: Expose whether the branchy loop k value
    @@ Metadata
      ## Commit message ##
         arm64: proton-pack: Expose whether the branchy loop k value
     
    +    [ Upstream commit a1152be30a043d2d4dcb1683415f328bf3c51978 ]
    +
         Add a helper to expose the k value of the branchy loop. This is needed
         by the BPF JIT to generate the mitigation sequence in BPF programs.
     
         Signed-off-by: James Morse <james.morse@arm.com>
         Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
    +    Signed-off-by: Pu Lehui <pulehui@huawei.com>
     
      ## arch/arm64/include/asm/spectre.h ##
    -@@ arch/arm64/include/asm/spectre.h: enum mitigation_state arm64_get_meltdown_state(void);
    +@@ arch/arm64/include/asm/spectre.h: void spectre_v4_enable_task_mitigation(struct task_struct *tsk);
      
      enum mitigation_state arm64_get_spectre_bhb_state(void);
      bool is_spectre_bhb_affected(const struct arm64_cpu_capabilities *entry, int scope);
---

Results of testing on various branches:

| Branch                    | Patch Apply | Build Test |
|---------------------------|-------------|------------|
| stable/linux-5.15.y       |  Success    |  Success   |