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b=c0MEvqrLpDu70Jk33JtQbIIL3fUa9sTy35IY8UOIk0VLjsJiCFQVGeXN3L+KyjDs jHkdtbcDSPswuytfPIhzI3ZZyar6B7SgdirnUFc2KTJ/LlDegphMZiPo31ExskrfG LnkvVXZiGy9UWKlVHjMuJ9nzcaN9W29uOSmcgaFXQlGgaSES/eg5oi1KeMQnNLDS7 XsueaguuGM59/SXCLgGWbYACaRzL6WFHGtkzgRAu4omW/NCbb/JHoIWWTxwiQbFKp NYV6eDYBZFPXBWhulxRzVCoRj0oyF44lPIyoe/OZQgWYpIeoUMGlmyMTgF4uXZpeb cZjWCctw5NJ8/P1ucw== 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 (mrgmx004 [212.227.17.190]) with ESMTPSA (Nemesis) id 1MbAcs-1r3QOs2Sfw-00beWD; Tue, 27 Feb 2024 15:05:02 +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 1/2] platform/x86/amd/pmf: Do not use readl() for policy buffer access Date: Tue, 27 Feb 2024 15:04:59 +0100 Message-Id: <20240227140500.98077-1-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:C6aJtexdwYmUh9Ddv7QlNY/6bRDo3vx1aY3rneKfsYaNVPw/Plg JqNWbcFLJ8FcYdUI/IyCq3iNw57NBDmbNi0sSjbbDxopWqLVulKRm8L3fm5LeoMaYGV2Scg pTP8/rQGx/T1IqD0k/yZa7g2Ev0bGLyKOFQwJlELfOuoBqZ7nTgK1Pa09uDs7M1EqtYpO0H c2QlGTsmkAwpAB1ijInnw== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:elZWmxoBk8Y=;CxMYko5Aj/lRL5QnnxQnlfAlxNu ViGcnuNGRP5uql0hSD4VvVnx7Q4z44KAFVsx3Eb8KnlH3+EP/O8uU3e2d2AW4Q2V2xSpxzE/E gyp1wZbVuC/OSt+VgQLvPYfXZnx/rsLXoo4zZQR1LKzjHZmVkSj2+jlPEAorHj9onsmOoOo94 YV3hmgl2jI1V+8W539C4yovoHGHWq2XRTd/eyVBOxcygpzMjT8feKmxEBUGO2J44WLXFEmdHT xBILXLLcAgtIZfMsmZfcti6DsJ+hnCs8n+Ix1Eh3glcvdnlNRR+pCnNt+dkwBU2ZLpqYBEMSI Sbb8MrtLZmAX/ydicobnURYz9R2HWfC8bdoiqykPcd/T3tvlq691bNZ87nTRYcjQml85l5BpN YlkhhMjjhyZQDbtQJRXBW1YpqscY0L5y/ckH98iu4jlXveFUxyAXu8wSAEbZL8QrcwWYkVl8d 9dU4s5DCqLO61HhCBRtr9caPDIgH4PDUMCqIuA9fgz2MRAQiv2uuo398ObP535Lxtn6c+TpsI vwgQcnEXLKC9EesbuvdLIIeeKmG8XTXH90xp7mzopIpMWz3afT2blRrYZ4qyKHPAQaJmuxOEm CRG1SgAU1OHBicVDBShf407zrPsXUo1HjNpa4pYhi8GLc7mnPQQK1xOaXLnUMGrPONdNxvcIm HR5WmcMWXoTFfWUC8dUwwj2WuS+v12UjpEByi9MUyjJeCTgAgvJdy32oIPn19Xckyc/wKuwd0 QpCJPj5S2so4cEKRMEPOUEZNPH3x4frWPkQI9fKgf1dJT9GEj9uWhNC9952msROp8w1rda1pC tORionmXDgUl998fi/xgtaVwbapabigUmax82zymLNDro= X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1792061803502136850 X-GMAIL-MSGID: 1792061803502136850 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 --- 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..70d09103ab18 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 = dev->policy_buf[POLICY_COOKIE_OFFSET]; + length = dev->policy_buf[POLICY_COOKIE_LEN]; if (cookie != POLICY_SIGN_COOKIE || !length) return -EINVAL;