From nobody Mon Feb 9 17:34:56 2026 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 B5BE848C8D3; Wed, 21 Jan 2026 12:59:58 +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=1769000399; cv=none; b=ikOiTfi3flte0xWazekIBcCeBjZuz1jYAooB0GQTa27DQWdCSlpFHyRGkOaydnJP/XWN8Zax8oWMeushVuniLaxfxBWE7xDm5PLBwRyK2VWpprAPwvGO0ITl52MdZW5UvOVggtykbhYxb5+xxpK4XhWRTpllD+KGmwzq/X1yeH8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1769000399; c=relaxed/simple; bh=vLjazFYFrcdZwtehxf7gnTv1xyibOoNdpX1K34q0p3I=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=MiYWRTximsmzpQ+86lGtKnmuepote0W+QgiLul6g6+i6EWSSz3RYdioKrUVFCiNNqvueBpQuF/OBDSEWbVy+oBHBn3r8WMr8OsjreIW4py0I3JehbPzX9vk6hrKc6In65ITJ9BmgVXqcZWmWS9C0B0ndsPpzrd657fkGStsAcOQ= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=NA7uryHE; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="NA7uryHE" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7CB17C19424; Wed, 21 Jan 2026 12:59:57 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1769000398; bh=vLjazFYFrcdZwtehxf7gnTv1xyibOoNdpX1K34q0p3I=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NA7uryHE9iDwVHrzumlE7t+lD0n+J50JcM2WsmP8rdBM5V740UnFfQSpZd3zEgQlO 3KuJZ6ov0sgy0kSEri4J3GcU92CTaacv1iawToZP3zTfDkLPoCbRlTEsUsBEe52rEc H47Ac15N2NaKplHUwls8z7+InCqBENsxsXQF8/RCGnFXRTDFrKhCbgA2GMXnHQyxSU LyMRfAJwBN8olNZH3eI4jquRR8lckL3LXaGHHC4SUsFUZT5VjOEGNCySBpArnoBXn3 rVWTFBcdxQK1AlCtQ3m2cgXv4OCxHy8eDXYIXsRQUkN7bFS8HznJU9Rs3eJu7usZDz eXLD+zUaulSww== From: Leon Romanovsky To: Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , Alex Deucher , David Airlie , Simona Vetter , Gerd Hoffmann , Dmitry Osipenko , Gurchetan Singh , Chia-I Wu , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Lucas De Marchi , =?utf-8?q?Thomas_Hellstr=C3=B6m?= , Rodrigo Vivi , Jason Gunthorpe , Leon Romanovsky , Kevin Tian , Joerg Roedel , Will Deacon , Robin Murphy , Felix Kuehling , Alex Williamson , Ankit Agrawal , Vivek Kasireddy Cc: linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, virtualization@lists.linux.dev, intel-xe@lists.freedesktop.org, linux-rdma@vger.kernel.org, iommu@lists.linux.dev, kvm@vger.kernel.org Subject: [PATCH v4 8/8] vfio: Validate dma-buf revocation semantics Date: Wed, 21 Jan 2026 14:59:16 +0200 Message-ID: <20260121-dmabuf-revoke-v4-8-d311cbc8633d@nvidia.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260121-dmabuf-revoke-v4-0-d311cbc8633d@nvidia.com> References: <20260121-dmabuf-revoke-v4-0-d311cbc8633d@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" X-Mailer: b4 0.15-dev-a6db3 Content-Transfer-Encoding: quoted-printable From: Leon Romanovsky Use the new dma_buf_attach_revocable() helper to restrict attachments to importers that support mapping invalidation. Signed-off-by: Leon Romanovsky --- drivers/vfio/pci/vfio_pci_dmabuf.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci_dmabuf.c b/drivers/vfio/pci/vfio_pci= _dmabuf.c index 5fceefc40e27..85056a5a3faf 100644 --- a/drivers/vfio/pci/vfio_pci_dmabuf.c +++ b/drivers/vfio/pci/vfio_pci_dmabuf.c @@ -31,6 +31,9 @@ static int vfio_pci_dma_buf_attach(struct dma_buf *dmabuf, if (priv->revoked) return -ENODEV; =20 + if (!dma_buf_attach_revocable(attachment)) + return -EOPNOTSUPP; + return 0; } =20 --=20 2.52.0