From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793873891; b=ZLbY7l2wyR+pswEJTuI68Vnls3zRDCWs0yKTnncHS3Otb1uvCWirtxuW7GfhRwEZYqYE RunfnuFVOTHP62O8j+lvtabMcIINvh3/RCwm8Hdfd48FkLPJo+9fRHwh45BVjc4ucPULr F8atsyr9yDP5a8AhJV10dBPL0xbKT2aAnfw3q7XSC6QTONvRAMKkLYPZVMMTd5OyCr3TX zWKhSq3GehuXHqsgqWhid35ShRRfa9CUcH/Xadw+wwiTNxc9gG8ZUiCT9tws4lcSOdWQY u5C42SA1pPhj9B3Giawfy/fh/FuKubQ5FEEylN80BDB8vfNsIoyZdKxPPBW1VJJHnOA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793873891; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=fNoQZtidaZo6zhv3wiVhqd0/wWG08cP0lxi0A62ZmmA=; b=ywzmq2a7SzpOqVH1svPrr7HxKhne3y+cpiaGb3r5XpZHgZkyu2zpKEdzzGyUg48P0+K4 qyswTw22gI+ah2CKQ5ytVnwNXCdNG1tNZLc/0T9pbJmdnwNIhvtWUf3OnbJcgU8gBS9Eg D967AcQiWgt5GXEuhSR+hQtAPqwZgT0efplsXIowok435dCyhbDoWcf3ElrKLg74Wnfwk LsN4Q39Uv2xmqrqEGs0B55q0R5GjEy/SaQ0pGA7QGFnBjZvTR7LBSFbOHigBYJeWRq5sG RTm8kszP3xyJ8SgS0dt1qby7mpqhX0Mj52mhKVl+tpvVOzz/f33OypTZlxl0Ax3twZA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b="Xbwt4e/s"; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 8DE14606A326; Thu, 5 Nov 2026 10:18:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=Xbwt4e/s Received: by smtp.kernel.org (Postfix) with ESMTPSA id EAC5E1F00919; Thu, 5 Nov 2026 10:18:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793873891; bh=fNoQZtidaZo6zhv3wiVhqd0/wWG08cP0lxi0A62ZmmA=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=Xbwt4e/sk5wfAFG8RufsuD9M1LhHyvHlI1OVKW8Qh7d72n6e6PaHvxsbQe67YNkTW /6d6GQ8guetSlgE4/DVGE2IklVICBiPlAbJh/TTEbjLL6vxMYGHwrRVX16SaExGsuC u8k71xaXtSsnb3FGjhVYdiXGvGXf6bKTBlwXmfCjPb6MhADh0lu5Hvn7V52SDrzAFr ZI5KWDE25e77XFJsv06cHDbxJglYmatHyi7/vJSZsqmHbdGoU4nRMNV4jjr3avjP2a ecwM5nAC700SxGdgsytr00VnhZugYDJFZazKqcPZm7sACF3hgGS4d0j1AFd+Dce4Zt r7Vu89gYLBZfg== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [PATCH v13 10/19] PCI/P2PDMA: Reject Translated Requests blocked by Translation Blocking Reply-To: sashiko-reviews@lists.linux.dev To: "Leon Romanovsky" Cc: linux-pci@vger.kernel.org, linux-rdma@vger.kernel.org In-Reply-To: <20261105-fix-p2p-acs-v4-0-v13-10-3dd065907c3b@nvidia.com> References: <20261105-fix-p2p-acs-v4-0-v13-0-3dd065907c3b@nvidia.com> <20261105-fix-p2p-acs-v4-0-v13-10-3dd065907c3b@nvidia.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 05 Nov 2026 10:18:10 +0000 X-Mailing-List: linux-rdma@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > From: Leon Romanovsky >=20 > ACS Translation Blocking rejects upstream Memory Requests with a Translat= ed > address before peer-routing controls apply. Ignoring it can report routes > that reject the Requester's address type. Intel SPT PCH Root Ports store > ACS Control at a nonstandard dword offset, so a standard word read also > misses Translation Blocking. >=20 > Scan every port traversed by each route and reject blocked Translated > classes without host-bridge fallback. Read the Intel control dword through > a device-specific accessor, preserving rejection of unreadable controls. > Direct routes remain usable when only ports above the divergence block > Translated Requests. >=20 > Signed-off-by: Leon Romanovsky Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20261105-fix-p2p-ac= s-v4-0-v13-0-3dd065907c3b@nvidia.com?part=3D10