linux-kernel - Re: [PATCHv9 12/16] x86/traps: Generalize #GP address decode and hint code

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Message-ID: <28173e1d-274e-4c37-9f2a-e3845bfd4d7b@intel.com>
Date: Tue, 8 Jul 2025 21:59:59 -0700
From: Sohil Mehta <sohil.mehta@...el.com>
To: "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>, Andy Lutomirski
	<luto@...nel.org>, Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar
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	<dave.hansen@...ux.intel.com>, <x86@...nel.org>, "H. Peter Anvin"
	<hpa@...or.com>, Peter Zijlstra <peterz@...radead.org>, Ard Biesheuvel
	<ardb@...nel.org>, "Paul E. McKenney" <paulmck@...nel.org>, Josh Poimboeuf
	<jpoimboe@...nel.org>, Xiongwei Song <xiongwei.song@...driver.com>, Xin Li
	<xin3.li@...el.com>, "Mike Rapoport (IBM)" <rppt@...nel.org>, Brijesh Singh
	<brijesh.singh@....com>, Michael Roth <michael.roth@....com>, Tony Luck
	<tony.luck@...el.com>, Alexey Kardashevskiy <aik@....com>, Alexander Shishkin
	<alexander.shishkin@...ux.intel.com>
CC: Jonathan Corbet <corbet@....net>, Ingo Molnar <mingo@...nel.org>, "Pawan
 Gupta" <pawan.kumar.gupta@...ux.intel.com>, Daniel Sneddon
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	<linux-doc@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
	<linux-efi@...r.kernel.org>, <linux-mm@...ck.org>
Subject: Re: [PATCHv9 12/16] x86/traps: Generalize #GP address decode and hint
 code

On 7/7/2025 1:03 AM, Kirill A. Shutemov wrote:
> In most cases, an access causing a LASS violation results in a general
> protection exception (#GP); for stack accesses (those due to
> stack-oriented instructions, as well as accesses that implicitly or
> explicitly use the SS segment register), a stack fault (#SS) is
> generated.
> 
> Handlers for #GP and #SS will now share code to decode the exception
> address and retrieve the exception hint string.
> 
> The helper, enum, and array should be renamed as they are no longer
> specific to #GP.
> 
> No functional change intended.
> 
> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> ---
>  arch/x86/kernel/dumpstack.c |  6 ++--
>  arch/x86/kernel/traps.c     | 58 ++++++++++++++++++-------------------
>  2 files changed, 32 insertions(+), 32 deletions(-)
> 

Reviewed-by: Sohil Mehta <sohil.mehta@...el.com>