linux-kernel - Re: [PATCH v3 03/10] x86/traps: Decode 0xEA #UD

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Message-ID: <101d4be1-9090-4d3f-8f21-d1ab6ecb79cd@citrix.com>
Date: Wed, 19 Feb 2025 16:47:10 +0000
From: Andrew Cooper <andrew.cooper3@...rix.com>
To: Peter Zijlstra <peterz@...radead.org>, x86@...nel.org
Cc: linux-kernel@...r.kernel.org, alyssa.milburn@...el.com,
 scott.d.constable@...el.com, joao@...rdrivepizza.com, jpoimboe@...nel.org,
 jose.marchesi@...cle.com, hjl.tools@...il.com, ndesaulniers@...gle.com,
 samitolvanen@...gle.com, nathan@...nel.org, ojeda@...nel.org,
 kees@...nel.org, alexei.starovoitov@...il.com, mhiramat@...nel.org,
 jmill@....edu
Subject: Re: [PATCH v3 03/10] x86/traps: Decode 0xEA #UD

On 19/02/2025 4:21 pm, Peter Zijlstra wrote:
> FineIBT will start using 0xEA as #UD
>
> Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>

FINEIBT probably ought to gain a "depends on X86_64" too, or this is
going to go wrong in a very fun way.

~Andrew