From: Andrew Cooper <andrew.cooper3@citrix.com>
To: Dave Hansen <dave.hansen@intel.com>,
"Xin Li (Intel)" <xin@zytor.com>,
linux-kernel@vger.kernel.org
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
peterz@infradead.org, stable@vger.kernel.org
Subject: Re: [PATCH v2 1/1] x86/fred/signal: Prevent single-step upon ERETU completion
Date: Thu, 22 May 2025 18:53:16 +0100 [thread overview]
Message-ID: <ad8d3a12-25f3-4d57-8f34-950b7967f92b@citrix.com> (raw)
In-Reply-To: <e4f1120b-0bff-4f01-8fe7-5e394a254020@intel.com>
On 22/05/2025 6:22 pm, Dave Hansen wrote:
> 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/.
Hmm.
This was a behaviour intentionally changed in FRED so traps wouldn't get
lost if an exception where to occur.
What precise case is triggering this?
~Andrew
next prev parent reply other threads:[~2025-05-22 17:53 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-05-22 17:17 Xin Li (Intel)
2025-05-22 17:22 ` Dave Hansen
2025-05-22 17:26 ` Xin Li
2025-05-22 17:53 ` Andrew Cooper [this message]
2025-05-22 21:28 ` H. Peter Anvin
2025-05-23 0:10 ` Andrew Cooper
2025-05-23 3:48 ` H. Peter Anvin
2025-05-23 0:57 ` Xin Li
2025-05-23 7:42 ` H. Peter Anvin
2025-05-23 17:21 ` Xin Li
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