Re: [PATCH 5.10 07/14] arm64: errata: Add KRYO 2XX/3XX/4XX silver cores to Spectre BHB safe list

[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: 0c9fc6e652cd5aed48c5f700c32b7642bea7f453

WARNING: Author mismatch between patch and upstream commit:
Backport author: Pu Lehui<pulehui@huaweicloud.com>
Commit author: Douglas Anderson<dianders@chromium.org>

Status in newer kernel trees:
6.15.y | Present (exact SHA1)
6.14.y | Present (different SHA1: 8b5a68a204a7)
6.12.y | Present (different SHA1: 20c105f58769)
6.6.y | Present (different SHA1: db8a657980e7)
6.1.y | Present (different SHA1: 75791c0441bd)
5.15.y | Present (different SHA1: 0b08172a635d)

Note: The patch differs from the upstream commit:
---
1:  0c9fc6e652cd5 ! 1:  2c972033c21bc arm64: errata: Add KRYO 2XX/3XX/4XX silver cores to Spectre BHB safe list
    @@ Metadata
      ## Commit message ##
         arm64: errata: Add KRYO 2XX/3XX/4XX silver cores to Spectre BHB safe list
     
    +    [ Upstream commit 0c9fc6e652cd5aed48c5f700c32b7642bea7f453 ]
    +
         Qualcomm has confirmed that, much like Cortex A53 and A55, KRYO
         2XX/3XX/4XX silver cores are unaffected by Spectre BHB. Add them to
         the safe list.
    @@ Commit message
         Acked-by: Trilok Soni <quic_tsoni@quicinc.com>
         Link: https://lore.kernel.org/r/20250107120555.v4.3.Iab8dbfb5c9b1e143e7a29f410bce5f9525a0ba32@changeid
         Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
    +    Signed-off-by: Pu Lehui <pulehui@huawei.com>
     
      ## arch/arm64/kernel/proton-pack.c ##
     @@ arch/arm64/kernel/proton-pack.c: static bool is_spectre_bhb_safe(int scope)
---

Results of testing on various branches:

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