From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6D4792144D4 for ; Wed, 19 Feb 2025 17:51:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739987509; cv=none; b=ijUkxLWYhU9nwgET343xMAsKO671DfiGrE57gRbXYdZvD30N/jtxH8CFI2n64yv2jCQXBknWr3vSUb21hAmJ6jXTsCY/aVi2MsXXbJK0GE6N2Qbv+MvY2al/GBV5GtIrbylJQtb7TZg3QTFYvATzwV3g3Utp8joqV8hTLO7Rlos= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739987509; c=relaxed/simple; bh=/ff/0UXg38aLKctMxnvl4lnVr5VfBll5+fjnRPFJIaY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=cVB3yTUxXPojldRJvYUVTD9K7drb1VjdpV73pj2jw0dBGP+48UL8F066asyqQiLriMajnbcKylpjs+aaaxZd9ZD/oJ1hTULJoV72tIzpXIEdw3oGRqlnVUY3Gw+xjqiu+OqOArdaWoVPDYuH5s4nRERFmnK+K1P04gb2ZoDUIWU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=Xrm3ZVYw; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="Xrm3ZVYw" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CBAB9C4CEE0; Wed, 19 Feb 2025 17:51:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1739987508; bh=/ff/0UXg38aLKctMxnvl4lnVr5VfBll5+fjnRPFJIaY=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Xrm3ZVYwqo9lWjAu1UeDN/ZPOARWANfqIiLsNRgQjzigWtrX53M8XXYbBf7LVRUvq /p1a8beL96o7lRI38FrZEdcg39tcOegeeKZtVkXvux6n3+7T/SqbAq2E89/1hcstF8 TMFbQ0Vl6KGZM9l92uKB3WpTQH8FauXfkPU2HiPUceR+uQh/e0EIcqnDeyCyRjWXdv 86gRVUTdhzRktYct0gjh2ZSzoGPQ6VwpW9aETXCTzDUNAzMqjDQmuVn3XKm+Qp3Udn R6lC+QvKr1hL93hDUY+QOCTjeswChuCcZyGzg0Wp9+p0HVF8IAQQLgHHP5LgYJ+32p 2Cpo5TCpo4oEQ== Date: Wed, 19 Feb 2025 09:51:45 -0800 From: Kees Cook To: Peter Zijlstra Cc: x86@kernel.org, linux-kernel@vger.kernel.org, alyssa.milburn@intel.com, scott.d.constable@intel.com, joao@overdrivepizza.com, andrew.cooper3@citrix.com, jpoimboe@kernel.org, jose.marchesi@oracle.com, hjl.tools@gmail.com, ndesaulniers@google.com, samitolvanen@google.com, nathan@kernel.org, ojeda@kernel.org, alexei.starovoitov@gmail.com, mhiramat@kernel.org, jmill@asu.edu Subject: Re: [PATCH v3 02/10] x86/ibt: Add exact_endbr() helper Message-ID: <202502190951.8772BC254@keescook> References: <20250219162107.880673196@infradead.org> <20250219163514.475718637@infradead.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250219163514.475718637@infradead.org> On Wed, Feb 19, 2025 at 05:21:09PM +0100, Peter Zijlstra wrote: > For when we want to exactly match ENDBR, and not everything that we > can scribble it with. > > Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Kees Cook -- Kees Cook