From: Borislav Petkov <bp@alien8.de>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: Maciej Wieczor-Retman <m.wieczorretman@pm.me>,
tglx@kernel.org, peterz@infradead.org, xin@zytor.com,
maciej.wieczor-retman@intel.com, babu.moger@amd.com,
chang.seok.bae@intel.com, sohil.mehta@intel.com,
dave.hansen@linux.intel.com, jpoimboe@kernel.org,
elena.reshetova@intel.com, pawan.kumar.gupta@linux.intel.com,
ak@linux.intel.com, darwi@linutronix.de, mingo@redhat.com,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v11 3/4] x86/cpu: Do a sanity check on required feature bits
Date: Mon, 23 Mar 2026 21:58:41 +0100 [thread overview]
Message-ID: <20260323205841.GFacGpgZDBOCCG9Y5u@fat_crate.local> (raw)
In-Reply-To: <e59fc661-6e27-49ca-9582-cf8dd99585e8@zytor.com>
On Mon, Mar 23, 2026 at 01:24:25PM -0700, H. Peter Anvin wrote:
> > So what are we really "fixing" here...?
> You can make the same argument about #MC for example: why bother trying to get
> a message out when the CPU is literally telling you that your system just broke?
I don't think you're parsing me right: do you have actual, real-life use cases
for which you want this or is this something hypothetical?
Because from where I'm standing, this sounds like let's slap another checking
function somewhere, we won't hit it ever but just in case, let's be prepared.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2026-03-23 20:59 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-20 12:50 [PATCH v11 0/4] x86: Capability bits fix and required bits sanity check Maciej Wieczor-Retman
2026-03-20 12:50 ` [PATCH v11 1/4] x86/cpu: Clear feature bits disabled at compile-time Maciej Wieczor-Retman
2026-03-20 12:50 ` [PATCH v11 2/4] x86/cpu: Check if feature string is non-zero Maciej Wieczor-Retman
2026-03-23 14:24 ` Borislav Petkov
2026-03-23 15:52 ` Maciej Wieczor-Retman
2026-03-23 16:23 ` Borislav Petkov
2026-03-23 16:58 ` Maciej Wieczor-Retman
2026-03-23 17:51 ` Borislav Petkov
2026-03-23 18:11 ` Maciej Wieczor-Retman
2026-03-23 18:15 ` H. Peter Anvin
2026-03-20 12:50 ` [PATCH v11 3/4] x86/cpu: Do a sanity check on required feature bits Maciej Wieczor-Retman
2026-03-21 0:31 ` Pawan Gupta
2026-03-21 5:58 ` Maciej Wieczór-Retman
2026-03-23 18:16 ` Pawan Gupta
2026-03-23 18:33 ` Maciej Wieczor-Retman
2026-03-26 18:36 ` Maciej Wieczor-Retman
2026-03-26 19:04 ` Pawan Gupta
2026-03-26 19:11 ` Maciej Wieczor-Retman
2026-03-28 1:52 ` H. Peter Anvin
2026-03-28 2:01 ` H. Peter Anvin
2026-03-30 9:47 ` Maciej Wieczor-Retman
2026-03-30 10:09 ` Maciej Wieczor-Retman
2026-03-30 16:01 ` Pawan Gupta
2026-03-30 21:24 ` David Laight
2026-03-31 8:12 ` Maciej Wieczor-Retman
2026-03-31 13:29 ` Maciej Wieczor-Retman
2026-03-23 16:31 ` Borislav Petkov
2026-03-23 17:05 ` Maciej Wieczor-Retman
2026-03-23 17:55 ` Borislav Petkov
2026-03-23 18:43 ` H. Peter Anvin
2026-03-23 18:43 ` H. Peter Anvin
2026-03-23 19:19 ` Borislav Petkov
2026-03-23 20:24 ` H. Peter Anvin
2026-03-23 20:58 ` Borislav Petkov [this message]
2026-03-23 21:40 ` H. Peter Anvin
2026-03-23 21:50 ` Borislav Petkov
2026-03-23 21:56 ` Borislav Petkov
2026-03-23 22:03 ` H. Peter Anvin
2026-03-23 22:09 ` Borislav Petkov
2026-03-24 1:16 ` H. Peter Anvin
2026-03-20 12:50 ` [PATCH v11 4/4] x86/cpu: Clear feature bits whose dependencies were cleared Maciej Wieczor-Retman
2026-03-23 16:35 ` Borislav Petkov
2026-03-23 17:23 ` Maciej Wieczor-Retman
2026-03-23 17:59 ` Borislav Petkov
2026-03-23 18:18 ` Maciej Wieczor-Retman
2026-03-23 18:57 ` H. Peter Anvin
2026-03-23 19:30 ` Borislav Petkov
2026-03-25 9:33 ` Maciej Wieczor-Retman
2026-03-23 19:33 ` Ahmed S. Darwish
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