From nobody Thu Apr 10 18:53:37 2025 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 64490170A13 for ; Wed, 2 Apr 2025 17:47:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743616035; cv=none; b=g9kV4zSbLWOj24w+/4VNFd2XgU5GIV9Oupm30kHJRpcLbuNiwEIRFxBO9OPoR7iDDbLh1K74lBK12htv+72uVDedQAgavgHusSF2HGC7dmLm6fNjdHSn+6fLSSvqNmKNNs2sMIZD5QvcmEN/oaYo92oE5oHMBM/l5B9FATUcWiQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1743616035; c=relaxed/simple; bh=DaC4xIu8S920LD9rwCqJXW5v8vFKT9MSwvYIoasRtA8=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=ONZfUW7yA6Sfwzf6lO8GkhD55bY9+EZXLDYnSd7gxD56KiJx5QkaBaE3+L90Ry011hCdvpPbYP9B1/pgqq9+mlXO4guEI0M5GWgprlfQRqvy0ep15Bq8lEiAOumo8nvevaBPlHCNQ6WyK+wnkoWvnFbidVRM/2YgUTvRmWO8vr0= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=K64Walcm; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="K64Walcm" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1743616032; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Ue9UDRpcZFfRT6ZZ3d1v/ptuQfesmwypehS6C96747U=; b=K64WalcmOYg5l/C5+o4Cdfc1KxfFthfq7JkxR60vu0Oc0De0imlDfLU/7YruUgkDFBiJiG IKPnKZb4PO2XFSFRl/m70YuoqV1N6CGXSvxEzzT0SO8x4pj3rz2eoKLK4mRBmy4IuGlhXq m/Is/YT+6wwjEvjNGLV43zytCb8RBHU= Received: from mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-433-kw_GrFiVMlSP8i_dIaLUnA-1; Wed, 02 Apr 2025 13:46:45 -0400 X-MC-Unique: kw_GrFiVMlSP8i_dIaLUnA-1 X-Mimecast-MFC-AGG-ID: kw_GrFiVMlSP8i_dIaLUnA_1743616003 Received: from mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.111]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 2ECDF19560B3; Wed, 2 Apr 2025 17:46:43 +0000 (UTC) Received: from [127.0.1.1] (unknown [10.44.32.79]) by mx-prod-int-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 5EA6C180174E; Wed, 2 Apr 2025 17:46:36 +0000 (UTC) From: Sergio Lopez Date: Wed, 02 Apr 2025 19:46:01 +0200 Subject: [PATCH v2 2/2] drm/virtio: add VIRTGPU_PARAM_HOST_PAGE_SIZE to params 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" Content-Transfer-Encoding: quoted-printable Message-Id: <20250402-virtio-gpu-host-page-size-v2-2-0afdc8c16cb9@redhat.com> References: <20250402-virtio-gpu-host-page-size-v2-0-0afdc8c16cb9@redhat.com> In-Reply-To: <20250402-virtio-gpu-host-page-size-v2-0-0afdc8c16cb9@redhat.com> To: David Airlie , Gerd Hoffmann , Gurchetan Singh , Chia-I Wu , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Simona Vetter , "Michael S. Tsirkin" , Jason Wang , Xuan Zhuo , =?utf-8?q?Eugenio_P=C3=A9rez?= , Gurchetan Singh , Rob Clark , Dmitry Osipenko Cc: dri-devel@lists.freedesktop.org, virtualization@lists.linux.dev, linux-kernel@vger.kernel.org, Sergio Lopez X-Developer-Signature: v=1; a=openpgp-sha256; l=1770; i=slp@redhat.com; h=from:subject:message-id; bh=DaC4xIu8S920LD9rwCqJXW5v8vFKT9MSwvYIoasRtA8=; b=owEBbQKS/ZANAwAIAfRpJ40vDAI1AcsmYgBn7Xftkj6yT9EYp57Tc7Bmv1zyoPKTdeDBQ7qkl d5Bd7CqT4+JAjMEAAEIAB0WIQS+1fz3US2GgJFC6KL0aSeNLwwCNQUCZ+137QAKCRD0aSeNLwwC NRArD/0f+7eo5bUxWQvbJN9KrMRdB2fyPQ13i4nJAfYT2e5NlYqIOhBo+y/gR947CahgRByLNV8 jx8rTk7ec5IxbSV91+/+vY0HdH7yYPCfZv9cqTikzbYNU/vKRPJnoz3yLjJy/DxOFKIl5VmUzZu lCGqhAcV5pUkDcOZIGasG8w3Ep4yKTb5nHFMbtVr9Wf1lijRwgFwVZ5IqcLQ3LlSwzQID1WaNn0 N0bXN0mpScF2yetVddZSZWm/1mdUyaYpa6xT2NTy9kSEZlSNL9lyTp26q0yngn/O5OZ44t1KVdj KpuRWNbdQZePkyV2yO8fgRRxFYr4yWzIyhnul27ocIi8cUIIV8TjLGhro930WzpXpW+MpH9Edv1 sFkdhGn1Az2kHAqVrvucxuZGc3MUIx81KQKXOQLGIUrDkKjdN+iQxdlu1vUKP3FoSQnVLwxxZae HwcbB1dO4Wh2FjClL6uGFKWjtT/X1PUAq64opjQxpMzeovGquNOPdjzr0yeWnOpICLrXGaCZrsf hkqcoKur8y7PKCIHiynf/TEONEmBpkv+MG6MAdohfF0l38IM6ALTOykqyizM3Fk/iLqMQK+9IZd bKWy/z1Raq7iOS3z42kPCMv5aDJvCibrOSat/d25u4ZIKy6upBMx2qjqxOqhHlJBOeJHa13i/tA 5FpFGFmlEcviBYQ== X-Developer-Key: i=slp@redhat.com; a=openpgp; fpr=BED5FCF7512D86809142E8A2F469278D2F0C0235 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.111 Add VIRTGPU_PARAM_HOST_PAGE_SIZE as a param that can be read with VIRTGPU_GETPARAM by userspace applications running in the guest to obtain the host's page size and find out the right alignment to be used in shared memory allocations. Signed-off-by: Sergio Lopez --- drivers/gpu/drm/virtio/virtgpu_ioctl.c | 5 +++++ include/uapi/drm/virtgpu_drm.h | 1 + 2 files changed, 6 insertions(+) diff --git a/drivers/gpu/drm/virtio/virtgpu_ioctl.c b/drivers/gpu/drm/virti= o/virtgpu_ioctl.c index c33c057365f85a2ace536f91655c903036827312..405203b3c3847a8b318a7118aa3= 4356c839d249e 100644 --- a/drivers/gpu/drm/virtio/virtgpu_ioctl.c +++ b/drivers/gpu/drm/virtio/virtgpu_ioctl.c @@ -117,6 +117,11 @@ static int virtio_gpu_getparam_ioctl(struct drm_device= *dev, void *data, case VIRTGPU_PARAM_EXPLICIT_DEBUG_NAME: value =3D vgdev->has_context_init ? 1 : 0; break; + case VIRTGPU_PARAM_HOST_PAGE_SIZE: + if (!vgdev->has_host_page_size) + return -EINVAL; + value =3D vgdev->host_page_size; + break; default: return -EINVAL; } diff --git a/include/uapi/drm/virtgpu_drm.h b/include/uapi/drm/virtgpu_drm.h index c2ce71987e9bb816d13a300679336cb756f1cbcf..505f87263a15f55302d7134335b= ebd91ff4cdae3 100644 --- a/include/uapi/drm/virtgpu_drm.h +++ b/include/uapi/drm/virtgpu_drm.h @@ -98,6 +98,7 @@ struct drm_virtgpu_execbuffer { #define VIRTGPU_PARAM_CONTEXT_INIT 6 /* DRM_VIRTGPU_CONTEXT_INIT */ #define VIRTGPU_PARAM_SUPPORTED_CAPSET_IDs 7 /* Bitmask of supported capab= ility set ids */ #define VIRTGPU_PARAM_EXPLICIT_DEBUG_NAME 8 /* Ability to set debug name f= rom userspace */ +#define VIRTGPU_PARAM_HOST_PAGE_SIZE 9 /* Host's page size */ =20 struct drm_virtgpu_getparam { __u64 param; --=20 2.48.1