x86/CPU/AMD: Rework Zen family detection and other fun

[PATCH 00/13] x86/CPU/AMD: Rework Zen family detection and other fun

Posted by Borislav Petkov 2 years ago

From: "Borislav Petkov (AMD)" <bp@alien8.de>

Add Zen generation flags which will be used to check on what type of Zen
the kernel runs. Distribute the per-generation init work into the
respective functions and cleanup amd.c properly.

As a result, drop the errata checking gunk which is not needed anymore.

There should be no functionality change resulting from these changes.

Borislav Petkov (AMD) (13):
  x86/CPU/AMD: Add ZenX generations flags
  x86/CPU/AMD: Carve out the erratum 1386 fix
  x86/CPU/AMD: Move the Zen3 BTC_NO detection to the Zen3 init function
  x86/CPU/AMD: Move erratum 1076 fix into the Zen1 init function
  x86/CPU/AMD: Call the spectral chicken in the Zen2 init function
  x86/CPU/AMD: Rename init_amd_zn() to init_amd_zen_common()
  x86/CPU/AMD: Move Zenbleed check to the Zen2 init function
  x86/CPU/AMD: Move the DIV0 bug detection to the Zen1 init function
  x86/CPU/AMD: Get rid of amd_erratum_1054[]
  x86/CPU/AMD: Get rid of amd_erratum_383[]
  x86/CPU/AMD: Get rid of amd_erratum_400[]
  x86/CPU/AMD: Get rid of amd_erratum_1485[]
  x86/CPU/AMD: Drop now unused CPU erratum checking function

 arch/x86/include/asm/cpufeatures.h |   6 +-
 arch/x86/kernel/cpu/amd.c          | 266 ++++++++++++++---------------
 2 files changed, 135 insertions(+), 137 deletions(-)

-- 
2.42.0.rc0.25.ga82fb66fed25

Re: [PATCH 00/13] x86/CPU/AMD: Rework Zen family detection and other fun

Posted by Nikolay Borisov 2 years ago


On 20.11.23 г. 12:41 ч., Borislav Petkov wrote:
> From: "Borislav Petkov (AMD)" <bp@alien8.de>
> 
> Add Zen generation flags which will be used to check on what type of Zen
> the kernel runs. Distribute the per-generation init work into the
> respective functions and cleanup amd.c properly.
> 
> As a result, drop the errata checking gunk which is not needed anymore.
> 
> There should be no functionality change resulting from these changes.
> 
> Borislav Petkov (AMD) (13):
>    x86/CPU/AMD: Add ZenX generations flags
>    x86/CPU/AMD: Carve out the erratum 1386 fix
>    x86/CPU/AMD: Move the Zen3 BTC_NO detection to the Zen3 init function
>    x86/CPU/AMD: Move erratum 1076 fix into the Zen1 init function
>    x86/CPU/AMD: Call the spectral chicken in the Zen2 init function
>    x86/CPU/AMD: Rename init_amd_zn() to init_amd_zen_common()
>    x86/CPU/AMD: Move Zenbleed check to the Zen2 init function
>    x86/CPU/AMD: Move the DIV0 bug detection to the Zen1 init function
>    x86/CPU/AMD: Get rid of amd_erratum_1054[]
>    x86/CPU/AMD: Get rid of amd_erratum_383[]
>    x86/CPU/AMD: Get rid of amd_erratum_400[]
>    x86/CPU/AMD: Get rid of amd_erratum_1485[]
>    x86/CPU/AMD: Drop now unused CPU erratum checking function
> 
>   arch/x86/include/asm/cpufeatures.h |   6 +-
>   arch/x86/kernel/cpu/amd.c          | 266 ++++++++++++++---------------
>   2 files changed, 135 insertions(+), 137 deletions(-)
> 

The whole series LGTM:

Reviewed-by: Nikolay Borisov <nik.borisov@suse.com >