From: Armin Wolf Date: Mon, 4 Mar 2024 20:50:03 +0000 (+0100) Subject: platform/x86/amd/pmf: Do not use readl() for policy buffer access X-Git-Tag: v6.8.2~165 X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=faedc22c0c991b8860181d102414960ce3512f7e;p=thirdparty%2Fkernel%2Fstable.git platform/x86/amd/pmf: Do not use readl() for policy buffer access [ Upstream commit e42dddce83a0578a518cb7078930c8269a6083af ] The policy buffer is allocated using normal memory allocation functions, so readl() should not be used on it. Compile-tested only. Fixes: 7c45534afa44 ("platform/x86/amd/pmf: Add support for PMF Policy Binary") Signed-off-by: Armin Wolf Reviewed-by: Shyam Sundar S K Link: https://lore.kernel.org/r/20240304205005.10078-3-W_Armin@gmx.de Reviewed-by: Ilpo Järvinen Signed-off-by: Ilpo Järvinen Signed-off-by: Sasha Levin --- diff --git a/drivers/platform/x86/amd/pmf/tee-if.c b/drivers/platform/x86/amd/pmf/tee-if.c index dcbe8f85e1229..4ebfe0f5a7fb2 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) { dev_dbg(dev->dev, "cookie doesn't match\n");