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b=GROJXJV6thfdkh43yYiA7pMg6bBQOIT85UIY2BBvW8PraCp8lSdVh2HkPBenDk/W /uvBXAk2Ifa3F59oU81IugDQqew4NSWDNheGx1gqXwDilghN9z52Wz1u1DLyO7Nks 2JLS9Wg0xELMgi7KO5HSpdQHpSzGkxluC12HgFhgao3jJHCtRyhN90Nda4nMHd1jy j/BQ+Aly9EfDuXasZ2tAaJH0N+9F4LNBV15+U52UYNBeH4OyGwhh0tufCb9xTPI5h YQROsq3dFwBx8zzRhTeNYg1jMNd0lsTG4c1Q0ne/8Vdy2QZtZREsd6GP3goBG0Tn8 trZoKtyNx7aQUL9dgQ== X-UI-Sender-Class: 724b4f7f-cbec-4199-ad4e-598c01a50d3a Received: from mx-amd-b650.users.agdsn.de ([141.30.226.129]) by mail.gmx.net (mrgmx105 [212.227.17.168]) with ESMTPSA (Nemesis) id 1MMofc-1rMCzO1mZI-00Inal; Tue, 27 Feb 2024 15:55:06 +0100 From: Armin Wolf To: Shyam-sundar.S-k@amd.com Cc: hdegoede@redhat.com, ilpo.jarvinen@linux.intel.com, platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v2 1/2] platform/x86/amd/pmf: Do not use readl() for policy buffer access Date: Tue, 27 Feb 2024 15:54:59 +0100 Message-Id: <20240227145500.299683-1-W_Armin@gmx.de> X-Mailer: git-send-email 2.39.2 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-Provags-ID: V03:K1:8KiUowxFm24zflRHFezo2yJ/cJrOmOMZY/AlS3xfkTVnNy3VTYI +ddf09NQGCU6gAYOyOdu/nk3Kf6bSDjeekjJT8paBINFzSi2kIDQDFy4v7hmdAdm1xkrS10 nUr7QTQ4bB11MfW2BpVnXbmBo3fil38YTEamanCLMeV1c/oHvXPx6tzmA3DpCfKiQGXR4/v 73uB/UMRQr0gl4KvkoK8Q== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:a4bzPwQIcSM=;Eb8EQESCSjhnNAP1ad25UgGA6P6 b8CyjvkK1xvlXuGq7oXhYdLvjJ7nS6I39M41B/dYxMWP1hUbOguCBF21UfXqMeBjAv1+P6Mi9 BD6sCqAzPaVkviWaj9AEt+lwz2jaKcy4PLm1bDbdjk665kllTTUSc+sOb6qv/+9u4PE3ECl/B rhYeuTb5L9O7P3sc8xyBGYM49S8WPNUsVaD05DuLAcIau/5FIlxsLwaFYLFH0J89b6ClWTb5A +Bv+vWOCcerPMMIv3fRO91jem2Jp9kR/9oVgiRksFQlH5dkEydAww+H5l5c2tB0ba2FcEt1dr KXMSo/I7BKFEZo6OO4Qb0hNR+jDC+zT6ByEB8DANNp37Hc3EhN4qlZ29yJawsA3UGbC1/Gpon yrlYr7cgLM4/gD7ceezsCF/pzgovJx3vjF5J4qNIWKvp3HocBlZaApq54ourw8us1Kz+yPtrL NWMzaXslIXCp7ohAfHz91rS7GQTOb9Lmvw1iK+pr2Hw1zrTN6TLQuHQc6SW7jey56AaByJssk yK9r+uKWMcyqOSZ/BRSIeqVPiMHNnTliXbxITPDGuUaqVWjTKe8fNxPzW9CUmrC8t3aS8TCiI 3wAxrRL8S1goLkwgucNcycDsxFWbXkNf/CtO46890G0mkdjJRTHAzOlSi7jNqR69Qll2tZ3af 5PEUVIXfrEVreyvxUE/ZTiXLAfw6oFJzJQg6nvmM5J5iBv9Vyc6qOaPwFrLmyR6le1vLeow8I ce/mcmRDaMUGguGlzZhhak1BMZuX/0l/n4GkM8Qrc1d7Tro0Xb7EvmLbd9y265o3EZRBdg87N 5GM6JvBI44a+TWTjJ65sB8wVXFT++AsaYCtBMMlif35QU= X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792061803502136850 X-GMAIL-MSGID: 1792064353998113588 The policy buffer is allocated using normal memory allocation functions, so readl() should not be used on it. Compile-tested only. Signed-off-by: Armin Wolf --- Changes since v1: - get the full dword instead of only 8 bits --- drivers/platform/x86/amd/pmf/tee-if.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) -- 2.39.2 diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c index 16973bebf55f..b3491268b6a0 100644 --- a/drivers/platform/x86/amd/pmf/tee-if.c +++ b/drivers/platform/x86/amd/pmf/tee-if.c @@ -249,8 +249,8 @@ static int amd_pmf_start_policy_engine(struct amd_pmf_dev *dev) u32 cookie, length; int res; - cookie = readl(dev->policy_buf + POLICY_COOKIE_OFFSET); - length = readl(dev->policy_buf + POLICY_COOKIE_LEN); + cookie = *(u32 *)(dev->policy_buf + POLICY_COOKIE_OFFSET); + length = *(u32 *)(dev->policy_buf + POLICY_COOKIE_LEN); if (cookie != POLICY_SIGN_COOKIE || !length) return -EINVAL;