From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 807FFEFCBD4 for ; Mon, 16 Mar 2026 07:23:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2F70410E2FE; Mon, 16 Mar 2026 07:23:18 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="SZDfm4sF"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) by gabe.freedesktop.org (Postfix) with ESMTPS id EFADB10E303 for ; Mon, 16 Mar 2026 07:23:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1773645797; x=1805181797; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=47VKoQYDkWv2tzbnKOFCXxXvAH+nspEI5oRz9Pwv7sg=; b=SZDfm4sF3nMI2hK3ZgKw+YKAcHhk5Y5umMUFV3lRETdu0TgvU3tc0AZ1 GjVpiGLvgWA18eItfJzHkAM7cpG9fAOAuCwIHjrZCHQGFUgY/H97S1UZ8 snMX/tWr54Zn3scdfZ9JF5n5atOs3SvKaiAFBcrPOGTM7b85vKxKrHE1J gz+gpYxZPbY9BHuBLvcfD8hpN8ryOrLZXAjF8xWiVT7MSry3IVgTfoq3w ILBPFt2EgAit3z8nhEZEavI3F5WGuvwMftGWagel790Z2CW5K+u5mvtXp lvwyqfNfb2HIoWNax/toyLsDpWiEyVzES1O124Xvxy4dnuu+1SutmUtf/ w==; X-CSE-ConnectionGUID: /5ko2ZukSjyHCXewxkVqqg== X-CSE-MsgGUID: W0y5KTJETpmu4O4wCtCc6A== X-IronPort-AV: E=McAfee;i="6800,10657,11730"; a="92038912" X-IronPort-AV: E=Sophos;i="6.23,123,1770624000"; d="scan'208";a="92038912" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 16 Mar 2026 00:23:17 -0700 X-CSE-ConnectionGUID: WK5kSOrRTtanKQxoaIpKEg== X-CSE-MsgGUID: mXNosqZSTniozV8niz3sRA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,123,1770624000"; d="scan'208";a="226497585" Received: from dut6094bmgfrd.fm.intel.com ([10.80.55.31]) by fmviesa005.fm.intel.com with ESMTP; 16 Mar 2026 00:23:14 -0700 From: Jia Yao To: intel-xe@lists.freedesktop.org Cc: Jia Yao , stable@vger.kernel.org, Shuicheng Lin , Mathew Alwin , Michal Mrozek , Matthew Brost , Matthew Auld Subject: [PATCH v5 0/2] drm/xe: PAT index validation for CPU_ADDR_MIRROR and Date: Mon, 16 Mar 2026 07:22:55 +0000 Message-ID: <20260316072257.255372-1-jia.yao@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260129000147.339361-1-jia.yao@intel.com> References: <20260129000147.339361-1-jia.yao@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" This patch series strengthens PAT index validation to reject unsafe configurations for CPU cached memory, fixing a potential security issue where GPU could bypass CPU caches and read stale sensitive data. The first patch adds validation to the madvise ioctl path, rejecting XE_COH_NONE PAT indices when applied to CPU cached buffers (including CPU address mirror and userptr mappings). The second patch extends this validation to the vm_bind ioctl path, ensuring DRM_XE_VM_BIND_FLAG_CPU_ADDR_MIRROR is treated the same as DRM_XE_VM_BIND_OP_MAP_USERPTR with respect to PAT index requirements. Fixes: ada7486c5668 ("drm/xe: Implement madvise ioctl for xe") Cc: stable@vger.kernel.org # v6.18 Cc: Shuicheng Lin Cc: Mathew Alwin Cc: Michal Mrozek Cc: Matthew Brost Cc: Matthew Auld Jia Yao (2): drm/xe/uapi: Reject coh_none PAT index for CPU cached memory in madvise drm/xe: Reject coh_none PAT index for CPU_ADDR_MIRROR drivers/gpu/drm/xe/xe_vm.c | 2 +- drivers/gpu/drm/xe/xe_vm_madvise.c | 46 +++++++++++++++++++++++++++++- 2 files changed, 46 insertions(+), 2 deletions(-) -- 2.43.0