From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from draig.lan ([185.126.160.109]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-aba532581cesm199366366b.45.2025.02.13.13.17.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 13 Feb 2025 13:17:44 -0800 (PST) Received: from draig (localhost [IPv6:::1]) by draig.lan (Postfix) with ESMTP id 3BA375F7DE; Thu, 13 Feb 2025 21:17:43 +0000 (GMT) From: =?utf-8?Q?Alex_Benn=C3=A9e?= To: Kashyap Chamarthy Cc: qemu-devel@nongnu.org, maz@kernel.org, Joel Stanley , Ninad Palsule , qemu-arm@nongnu.org, Andrew Jeffery , Peter Maydell , Alexandre Iooss , Jamin Lin , =?utf-8?Q?C=C3=A9dric?= Le Goater , "Edgar E. Iglesias" , Eric Auger , Yi Liu , Hao Wu , Tyrone Ting , sebott@redhat.com, Steven Lee , Zhenzhong Duan , Troy Lee , Alistair Francis Subject: Re: [PATCH v2 2/3] docs/cpu-features: Update "PAuth" (Pointer Authentication) details In-Reply-To: <20250213135032.2987289-3-kchamart@redhat.com> (Kashyap Chamarthy's message of "Thu, 13 Feb 2025 14:50:30 +0100") References: <20250213135032.2987289-1-kchamart@redhat.com> <20250213135032.2987289-3-kchamart@redhat.com> User-Agent: mu4e 1.12.8; emacs 29.4 Date: Thu, 13 Feb 2025 21:17:43 +0000 Message-ID: <87pljlpmrs.fsf@draig.linaro.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-TUID: XvAz3AhGLJEz Kashyap Chamarthy writes: > PAuth (Pointer Authentication), a security feature in software, is > relevant for both KVM and QEMU. Relect this fact into the docs: > > - For KVM, `pauth` is a binary, "on" vs "off" option. The host CPU > will choose the cryptographic algorithm. > > - For TCG, however, along with `pauth`, a couple of properties can be > controlled -- they're are related to cryptographic algorithm choice. > > Thanks to Peter Maydell and Marc Zyngier for explaining more about PAuth > on IRC (#qemu, OFTC). > > Signed-off-by: Kashyap Chamarthy Reviewed-by: Alex Benn=C3=A9e --=20 Alex Benn=C3=A9e Virtualisation Tech Lead @ Linaro