linux-kernel - Re: [PATCH v2 1/1] x86/fred/signal: Prevent single-step upon ERETU completion

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Message-ID: <e4f1120b-0bff-4f01-8fe7-5e394a254020@intel.com>
Date: Thu, 22 May 2025 10:22:56 -0700
From: Dave Hansen <dave.hansen@...el.com>
To: "Xin Li (Intel)" <xin@...or.com>, linux-kernel@...r.kernel.org
Cc: tglx@...utronix.de, mingo@...hat.com, bp@...en8.de,
 dave.hansen@...ux.intel.com, x86@...nel.org, hpa@...or.com,
 peterz@...radead.org, andrew.cooper3@...rix.com, stable@...r.kernel.org
Subject: Re: [PATCH v2 1/1] x86/fred/signal: Prevent single-step upon ERETU
 completion

On 5/22/25 10:17, Xin Li (Intel) wrote:
> Clear the software event flag in the augmented SS to prevent infinite
> SIGTRAP handler loop if TF is used without an external debugger.

Do you have a test case for this? It seems like the kind of thing we'd
want in selftests/.