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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: -32 X-Spam_score: -3.3 X-Spam_bar: --- X-Spam_report: (-3.3 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.487, 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_CERTIFIED_BLOCKED=0.001, RCVD_IN_VALIDITY_RPBL_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: 1747753570964116600 Content-Type: text/plain; charset="utf-8" For vfio-user, the region write implementation needs to know if the write is posted; add the necessary plumbing to support this. Signed-off-by: John Levon Reviewed-by: C=C3=A9dric Le Goater --- include/hw/vfio/vfio-device.h | 4 ++-- include/hw/vfio/vfio-region.h | 1 + hw/vfio/device.c | 3 ++- hw/vfio/pci.c | 5 ++++- hw/vfio/region.c | 3 ++- 5 files changed, 11 insertions(+), 5 deletions(-) diff --git a/include/hw/vfio/vfio-device.h b/include/hw/vfio/vfio-device.h index 5cb817fd6a..a23ef4ea13 100644 --- a/include/hw/vfio/vfio-device.h +++ b/include/hw/vfio/vfio-device.h @@ -207,10 +207,10 @@ struct VFIODeviceIOOps { * @region_write * * Write @size bytes to the region @nr at offset @off from the buffer - * @data. + * @data; if @post, the write is posted. */ int (*region_write)(VFIODevice *vdev, uint8_t nr, off_t off, uint32_t = size, - void *data); + void *data, bool post); }; =20 void vfio_device_prepare(VFIODevice *vbasedev, VFIOContainerBase *bcontain= er, diff --git a/include/hw/vfio/vfio-region.h b/include/hw/vfio/vfio-region.h index 80e83b23fd..f1ae5125ba 100644 --- a/include/hw/vfio/vfio-region.h +++ b/include/hw/vfio/vfio-region.h @@ -30,6 +30,7 @@ typedef struct VFIORegion { VFIOMmap *mmaps; uint8_t nr; /* cache the region number for debug */ int fd; /* fd to mmap() region */ + bool post_wr; /* writes can be posted */ } VFIORegion; =20 =20 diff --git a/hw/vfio/device.c b/hw/vfio/device.c index 41db403992..cb1a212b8f 100644 --- a/hw/vfio/device.c +++ b/hw/vfio/device.c @@ -572,7 +572,8 @@ static int vfio_device_io_region_read(VFIODevice *vbase= dev, uint8_t index, } =20 static int vfio_device_io_region_write(VFIODevice *vbasedev, uint8_t index, - off_t off, uint32_t size, void *dat= a) + off_t off, uint32_t size, void *dat= a, + bool post) { struct vfio_region_info *info; int ret; diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index ef38b4692a..3d1dbdac38 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -1016,7 +1016,7 @@ static int vfio_pci_config_space_write(VFIOPCIDevice = *vdev, off_t offset, { return vdev->vbasedev.io_ops->region_write(&vdev->vbasedev, VFIO_PCI_CONFIG_REGION_INDE= X, - offset, size, data); + offset, size, data, false); } =20 static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size) @@ -1820,6 +1820,9 @@ static void vfio_bar_prepare(VFIOPCIDevice *vdev, int= nr) bar->type =3D pci_bar & (bar->ioport ? ~PCI_BASE_ADDRESS_IO_MASK : ~PCI_BASE_ADDRESS_MEM_MASK); bar->size =3D bar->region.size; + + /* IO regions are sync, memory can be async */ + bar->region.post_wr =3D (bar->ioport =3D=3D 0); } =20 static void vfio_bars_prepare(VFIOPCIDevice *vdev) diff --git a/hw/vfio/region.c b/hw/vfio/region.c index 3c93da91d8..936502b37a 100644 --- a/hw/vfio/region.c +++ b/hw/vfio/region.c @@ -66,7 +66,7 @@ void vfio_region_write(void *opaque, hwaddr addr, } =20 ret =3D vbasedev->io_ops->region_write(vbasedev, region->nr, - addr, size, &buf); + addr, size, &buf, region->post_wr= ); if (ret !=3D size) { error_report("%s(%s:region%d+0x%"HWADDR_PRIx", 0x%"PRIx64 ",%d) failed: %s", @@ -200,6 +200,7 @@ int vfio_region_setup(Object *obj, VFIODevice *vbasedev= , VFIORegion *region, region->size =3D info->size; region->fd_offset =3D info->offset; region->nr =3D index; + region->post_wr =3D false; if (vbasedev->region_fds !=3D NULL) { region->fd =3D vbasedev->region_fds[index]; } else { --=20 2.43.0