From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 32374426ECB for ; Fri, 15 May 2026 08:39:10 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778834351; cv=none; b=fME92mm94B6vNUvb6opzwFEFaAoyem/uBevctGeYGTaJofwVcoA8lIwJZyzVxXrIocXZh1DP/NBQyeUdtoKkmOedo3y8yn211cyonD0/0tEyPtsf7CZJo43WExb8zKQO38XjyujX8YVQw5ry8kZUmkhNPLjtCK2JY04X5HS8U7E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778834351; c=relaxed/simple; bh=EdHSCWHcl2A9xezgsNkBJF1WA1m0Jxacc2jBHU5Krr8=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=KvYtQamzebEjI/fWPahwaR9wlA05dvJWqPoMELV6gCdyd+akHLP0mM3l8xMhukkNrj3VqDPR5e25w2sg6HwkB62FEMN1ZCZdX0LYHvTNB3bvh8b5o+IGcFxQ1W8o225/muSyfGFyzBw3M89HTqchT4c9B/i3Hf2vMJhESWE5qgM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=l1SFXGuU; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="l1SFXGuU" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 71A82C2BCC7; Fri, 15 May 2026 08:39:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778834350; bh=EdHSCWHcl2A9xezgsNkBJF1WA1m0Jxacc2jBHU5Krr8=; h=Subject:To:Cc:From:Date:From; b=l1SFXGuUdf3Rf7+4PGlwvmvqHlW3BflmxHqx2u9kSrx8ef+FnYyDpQMrkHNP+51rh QiodMbbXFVeIL0XNobV9sdA2UIjbYfYe/evKAFvNO0nIvMCG3vvp7SMEz448S0lzBf gY0KDE3NBcTTna7K2MUI0RokWxX+MrYVerhbBl7c= Subject: FAILED: patch "[PATCH] drm/xe/uapi: Reject coh_none PAT index for CPU_ADDR_MIRROR" failed to apply to 7.0-stable tree To: jia.yao@intel.com,alwin.mathew@intel.com,matthew.auld@intel.com,matthew.brost@intel.com,michal.mrozek@intel.com,rodrigo.vivi@intel.com,shuicheng.lin@intel.com,stable@vger.kernel.org Cc: From: Date: Fri, 15 May 2026 10:39:14 +0200 Message-ID: <2026051514-backstab-kindly-3994@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 7.0-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-7.0.y git checkout FETCH_HEAD git cherry-pick -x 662f9ddc8077792129440d05cbef2f944a07777a # git commit -s git send-email --to '' --in-reply-to '2026051514-backstab-kindly-3994@gregkh' --subject-prefix 'PATCH 7.0.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From 662f9ddc8077792129440d05cbef2f944a07777a Mon Sep 17 00:00:00 2001 From: Jia Yao Date: Fri, 17 Apr 2026 05:59:17 +0000 Subject: [PATCH] drm/xe/uapi: Reject coh_none PAT index for CPU_ADDR_MIRROR Add validation in xe_vm_bind_ioctl() to reject PAT indices with XE_COH_NONE coherency mode when used with DRM_XE_VM_BIND_FLAG_CPU_ADDR_MIRROR. CPU address mirror mappings use system memory that is CPU cached, which makes them incompatible with COH_NONE PAT indices. Allowing COH_NONE with CPU cached buffers is a security risk, as the GPU may bypass CPU caches and read stale sensitive data from DRAM. Although CPU_ADDR_MIRROR does not create an immediate mapping, the backing system memory is still CPU cached. Apply the same PAT coherency restrictions as DRM_XE_VM_BIND_OP_MAP_USERPTR. v2: - Correct fix tag v6: - No change v7: - Correct fix tag v8: - Rebase v9: - Limit the restrictions to iGPU v10: - Just add the iGPU logic but keep dGPU logic Fixes: b43e864af0d4 ("drm/xe/uapi: Add DRM_XE_VM_BIND_FLAG_CPU_ADDR_MIRROR") Cc: # v6.15+ Cc: Shuicheng Lin Cc: Mathew Alwin Cc: Michal Mrozek Cc: Matthew Brost Cc: Matthew Auld Signed-off-by: Jia Yao Reviewed-by: Matthew Auld Acked-by: Michal Mrozek Signed-off-by: Matthew Auld Link: https://patch.msgid.link/20260417055917.2027459-3-jia.yao@intel.com (cherry picked from commit 4d58d7535e826a3175527b6174502f0db319d7f6) Signed-off-by: Rodrigo Vivi diff --git a/drivers/gpu/drm/xe/xe_vm.c b/drivers/gpu/drm/xe/xe_vm.c index 1720205c09ca..a717a2b8dea3 100644 --- a/drivers/gpu/drm/xe/xe_vm.c +++ b/drivers/gpu/drm/xe/xe_vm.c @@ -3658,6 +3658,8 @@ static int vm_bind_ioctl_check_args(struct xe_device *xe, struct xe_vm *vm, op == DRM_XE_VM_BIND_OP_MAP_USERPTR) || XE_IOCTL_DBG(xe, coh_mode == XE_COH_NONE && op == DRM_XE_VM_BIND_OP_MAP_USERPTR) || + XE_IOCTL_DBG(xe, !IS_DGFX(xe) && coh_mode == XE_COH_NONE && + is_cpu_addr_mirror) || XE_IOCTL_DBG(xe, xe_device_is_l2_flush_optimized(xe) && (op == DRM_XE_VM_BIND_OP_MAP_USERPTR || is_cpu_addr_mirror) &&