linux-kernel - Re: [PATCH v9 05/22] x86/cea: Use array indexing to simplify exception stack access

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Message-ID: <c65a332e-93e7-4329-a694-c9791ab589b2@intel.com>
Date: Mon, 27 Oct 2025 08:49:48 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: "Xin Li (Intel)" <xin@...or.com>, linux-kernel@...r.kernel.org,
 kvm@...r.kernel.org, linux-doc@...r.kernel.org
Cc: pbonzini@...hat.com, seanjc@...gle.com, corbet@....net,
 tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
 dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com, luto@...nel.org,
 peterz@...radead.org, andrew.cooper3@...rix.com, chao.gao@...el.com,
 hch@...radead.org, sohil.mehta@...el.com
Subject: Re: [PATCH v9 05/22] x86/cea: Use array indexing to simplify
 exception stack access

On 10/26/25 13:18, Xin Li (Intel) wrote:
> Refactor struct cea_exception_stacks to leverage array indexing for
> exception stack access, improving code clarity and eliminating the
> need for the ESTACKS_MEMBERS() macro.
> 
> Convert __this_cpu_ist_{bottom,top}_va() from macros to functions,
> allowing removal of the now-obsolete CEA_ESTACK_BOT and CEA_ESTACK_TOP
> macros.
> 
> Also drop CEA_ESTACK_SIZE, which just duplicated EXCEPTION_STKSZ.
> 
> Signed-off-by: Xin Li (Intel) <xin@...or.com>
> ---
> 
> Change in v9:
> * Refactor first and then export in a separate patch (Dave Hansen).

Thanks for the changes. This also removes the extra union{} that was in
the last version for padding.

Acked-by: Dave Hansen <dave.hansen@...ux.intel.com>