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b=DIoKQ+t0tarcsUoKLiYHCniOL+EX8KRFinBXbEBvZx0l1YXj4CqfCLXM/6Eb4dfAoSocQpmj9Qk6pOhI9YwKff4twtGI4rtLnqLpDFFKMvntJ7JGRtzMi0H1JURgD6sf9bbbEKSQs//LA5ziaKjfj8xR++imTW1HsNbHVjQzwVAUMeOTuhOC4RDacyELdbsOHIRJByCaXXmAJPWPdN6zFiQO/3a8r0I+bO78bK60R3vRjw6tONLbptnalp21Bf1g6wjCxZV3aIV2pPa4FeZbVcvrkOS42lNyODrQERjA1J1XA4kQy43G/XMTAs0vhtbfUMwoST5od/B74abwHnbu8A== From: John Levon To: qemu-devel@nongnu.org Cc: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Alex Williamson , John Levon Subject: [PATCH] vfio: add vfio_device_get_region_fd() Date: Mon, 16 Jun 2025 03:13:36 -0700 Message-ID: <20250616101337.3190027-1-john.levon@nutanix.com> X-Mailer: git-send-email 2.43.0 Content-Transfer-Encoding: quoted-printable X-ClientProxiedBy: AS4P189CA0020.EURP189.PROD.OUTLOOK.COM (2603:10a6:20b:5db::9) To CH2PR02MB6760.namprd02.prod.outlook.com (2603:10b6:610:7f::9) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CH2PR02MB6760:EE_|DM4PR02MB8885:EE_ X-MS-Office365-Filtering-Correlation-Id: 0f94b2c4-07af-4e39-ea1e-08ddacbe7748 x-proofpoint-crosstenant: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|1800799024|366016|376014; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=148.163.151.68; envelope-from=john.levon@nutanix.com; helo=mx0a-002c1b01.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @nutanix.com) X-ZM-MESSAGEID: 1750068875597116600 Content-Type: text/plain; charset="utf-8" This keeps the existence of ->region_fds private to hw/vfio/device.c. Signed-off-by: John Levon Reviewed-by: C=C3=A9dric Le Goater Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- include/hw/vfio/vfio-device.h | 12 ++++++++++++ hw/vfio/device.c | 7 +++++++ hw/vfio/region.c | 5 +---- 3 files changed, 20 insertions(+), 4 deletions(-) diff --git a/include/hw/vfio/vfio-device.h b/include/hw/vfio/vfio-device.h index d45e5a68a2..1926adb0a3 100644 --- a/include/hw/vfio/vfio-device.h +++ b/include/hw/vfio/vfio-device.h @@ -256,6 +256,18 @@ int vfio_device_get_region_info(VFIODevice *vbasedev, = int index, struct vfio_region_info **info); int vfio_device_get_region_info_type(VFIODevice *vbasedev, uint32_t type, uint32_t subtype, struct vfio_region_= info **info); + +/** + * Return the fd for mapping this region. This is either the device's fd (= for + * e.g. kernel vfio), or a per-region fd (for vfio-user). + * + * @vbasedev: #VFIODevice to use + * @index: region index + * + * Returns the fd. + */ +int vfio_device_get_region_fd(VFIODevice *vbasedev, int index); + bool vfio_device_has_region_cap(VFIODevice *vbasedev, int region, uint16_t= cap_type); =20 int vfio_device_get_irq_info(VFIODevice *vbasedev, int index, diff --git a/hw/vfio/device.c b/hw/vfio/device.c index d32600eda1..d91c695b69 100644 --- a/hw/vfio/device.c +++ b/hw/vfio/device.c @@ -243,6 +243,13 @@ retry: return 0; } =20 +int vfio_device_get_region_fd(VFIODevice *vbasedev, int index) +{ + return vbasedev->region_fds ? + vbasedev->region_fds[index] : + vbasedev->fd; +} + int vfio_device_get_region_info_type(VFIODevice *vbasedev, uint32_t type, uint32_t subtype, struct vfio_region_= info **info) { diff --git a/hw/vfio/region.c b/hw/vfio/region.c index f5b8e3cbf1..d04c57db63 100644 --- a/hw/vfio/region.c +++ b/hw/vfio/region.c @@ -273,10 +273,7 @@ int vfio_region_mmap(VFIORegion *region) goto no_mmap; } =20 - /* Use the per-region fd if set, or the shared fd. */ - fd =3D region->vbasedev->region_fds ? - region->vbasedev->region_fds[region->nr] : - region->vbasedev->fd, + fd =3D vfio_device_get_region_fd(region->vbasedev, region->nr); =20 map_align =3D (void *)ROUND_UP((uintptr_t)map_base, (uintptr_t)ali= gn); munmap(map_base, map_align - map_base); --=20 2.43.0