From nobody Mon Feb 9 16:02:23 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 B106344BC8F; Tue, 20 Jan 2026 14:07:44 +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=1768918064; cv=none; b=Gv5P1wgIT73jG2ny/lW5O+4cuGnZVmejezEYP/ph9oQbG4eV4Pbs21ULU4t1zNSwccQhuaAGX2IwRA+fNq8oBYJTySY85mV46hPLLtJAW8j7yYDbGpgDTSWApdbM//65rS/nzuJlze1O0sMtMGpNGS5kWCpNMu2PeUqAI6hFhQI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768918064; c=relaxed/simple; bh=+j0ekknPQd/d3gRAxiqnNNnfw0hqFAwwAjsZYhI192Y=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=n9IuiPqazEo4QYwDyoPvwMdwEs0KDvUm54u6F38pHnZ4aiIO/PU/VvDeM9NzIz3HUDAx4qw+MBWDG+FsYmeP9ryuFH/Uay7Uf3FWD2JTRVX8VdF6IZMRYISxjCnaaxYrXFTZK8++K81//XqUreY/NEplZulDCXdyE80ATrUVsa8= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ijj/wO77; 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="ijj/wO77" Received: by smtp.kernel.org (Postfix) with ESMTPSA id A92D6C16AAE; Tue, 20 Jan 2026 14:07:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768918064; bh=+j0ekknPQd/d3gRAxiqnNNnfw0hqFAwwAjsZYhI192Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ijj/wO771lycS6FKxtpygkeK/BYUHKt2nUSEqMQc/fe3SpJqqJcZ/BWCkpIQHgiev S+Mf1rPln8yu+F+l0oxZG17ZYhJVhUmOOaXGRiQiIBKGtLNc0IgMJWG2CRJYDmkieP 5a/VPKZauZJfX0w5M94s+0B+uQ1I4TbxB1ftUo/dLav7fV9nfxwwD7OdKnSh9ZF6iI /6dB5AHN3tBpnq0H+i2vDN0zwB0+7FapFUTpuAq/16it37Dv+DIWjBTSnV+vXDMZEJ wa4KiwHpfHeh/NIPj1cnYuRyh73tj+UYbl1afb2guZsXGQRwLqiccEkTVLl9YVBg3w 6Da43ktVUa1LQ== 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 v3 7/7] vfio: Validate dma-buf revocation semantics Date: Tue, 20 Jan 2026 16:07:07 +0200 Message-ID: <20260120-dmabuf-revoke-v3-7-b7e0b07b8214@nvidia.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260120-dmabuf-revoke-v3-0-b7e0b07b8214@nvidia.com> References: <20260120-dmabuf-revoke-v3-0-b7e0b07b8214@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 33bc6a1909dd..0c7782a51912 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