linux-kernel - Re: [PATCH v2 03/16] x86/mce/amd: Remove smca_banks

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Message-ID: <20250217141733.GD591070@yaz-khff2.amd.com>
Date: Mon, 17 Feb 2025 09:17:33 -0500
From: Yazen Ghannam <yazen.ghannam@....com>
To: "Zhuo, Qiuxu" <qiuxu.zhuo@...el.com>
Cc: "x86@...nel.org" <x86@...nel.org>, "Luck, Tony" <tony.luck@...el.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-edac@...r.kernel.org" <linux-edac@...r.kernel.org>,
	"Smita.KoralahalliChannabasappa@....com" <Smita.KoralahalliChannabasappa@....com>
Subject: Re: [PATCH v2 03/16] x86/mce/amd: Remove smca_banks_map

On Mon, Feb 17, 2025 at 07:57:47AM +0000, Zhuo, Qiuxu wrote:
> > From: Yazen Ghannam <yazen.ghannam@....com>
> > Sent: Friday, February 14, 2025 12:46 AM
> > To: x86@...nel.org; Luck, Tony <tony.luck@...el.com>
> > Cc: linux-kernel@...r.kernel.org; linux-edac@...r.kernel.org;
> > Smita.KoralahalliChannabasappa@....com; Yazen Ghannam
> > <yazen.ghannam@....com>
> > Subject: [PATCH v2 03/16] x86/mce/amd: Remove smca_banks_map
> > 
> > The MCx_MISC0[BlkPtr] field was used on legacy systems to hold a register
> > offset for the next MCx_MISC* register. In this way, an implementation-
> > specific number of registers can be discovered at runtime.
> > 
> > The MCAX/SMCA register space simplifies this by always including the
> > MCx_MISC[1-4] registers. The MCx_MISC0[BlkPtr] field is used to indicate
> > (true/false) whether any MCx_MISC[1-4] registers are present.
> > But it does not indicate which ones nor how many. Therefore, all the registers
> 
> s/nor/or     (suggested by AI 😊)
> OR
> s/does not indicate/indicates neither
> 

Hmm, okay, I think the second one.

  "But it indicates neither which ones nor how many".

I guess this falls under "Using 'nor' without a correlative pair".
https://www.learngrammar.net/a/how-to-use-nor-properly-in-a-sentence

:)

> > are accessed and their bits are checked.
> > 
> > AMD systems generally enforce a Read-as-Zero/Writes-Ignored policy for
> > unused registers. Therefore, there is no harm to read an unused register. This
> > is already done in practice for most of the MCx_MISC registers.
> > 
> > Remove the smca_banks_map variable as it is effectively redundant.
> > 
> > Signed-off-by: Yazen Ghannam <yazen.ghannam@....com>
> 
> Aside from the small nit above,
> 
>     Reviewed-by: Qiuxu Zhuo <qiuxu.zhuo@...el.com> 

Thanks,
Yazen