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([2a01:e0a:280:24f0:576b:abc6:6396:ed4a]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4532513e93asm12482695e9.6.2025.06.11.00.24.47 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 11 Jun 2025 00:24:47 -0700 (PDT) Message-ID: Date: Wed, 11 Jun 2025 09:24:47 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 04/23] vfio: mark posted writes in region write callbacks To: John Levon , qemu-devel@nongnu.org Cc: =?UTF-8?Q?Daniel_P=2E_Berrang=C3=A9?= , Paolo Bonzini , Thanos Makatos , =?UTF-8?Q?Marc-Andr=C3=A9_Lureau?= , Alex Williamson , =?UTF-8?Q?Philippe_Mathieu-Daud=C3=A9?= References: <20250607001056.335310-1-john.levon@nutanix.com> <20250607001056.335310-5-john.levon@nutanix.com> Content-Language: en-US, fr From: =?UTF-8?Q?C=C3=A9dric_Le_Goater?= Autocrypt: addr=clg@redhat.com; keydata= xsFNBFu8o3UBEADP+oJVJaWm5vzZa/iLgpBAuzxSmNYhURZH+guITvSySk30YWfLYGBWQgeo 8NzNXBY3cH7JX3/a0jzmhDc0U61qFxVgrPqs1PQOjp7yRSFuDAnjtRqNvWkvlnRWLFq4+U5t yzYe4SFMjFb6Oc0xkQmaK2flmiJNnnxPttYwKBPd98WfXMmjwAv7QfwW+OL3VlTPADgzkcqj 53bfZ4VblAQrq6Ctbtu7JuUGAxSIL3XqeQlAwwLTfFGrmpY7MroE7n9Rl+hy/kuIrb/TO8n0 ZxYXvvhT7OmRKvbYuc5Jze6o7op/bJHlufY+AquYQ4dPxjPPVUT/DLiUYJ3oVBWFYNbzfOrV RxEwNuRbycttMiZWxgflsQoHF06q/2l4ttS3zsV4TDZudMq0TbCH/uJFPFsbHUN91qwwaN/+ gy1j7o6aWMz+Ib3O9dK2M/j/O/Ube95mdCqN4N/uSnDlca3YDEWrV9jO1mUS/ndOkjxa34ia 70FjwiSQAsyIwqbRO3CGmiOJqDa9qNvd2TJgAaS2WCw/TlBALjVQ7AyoPEoBPj31K74Wc4GS Rm+FSch32ei61yFu6ACdZ12i5Edt+To+hkElzjt6db/UgRUeKfzlMB7PodK7o8NBD8outJGS tsL2GRX24QvvBuusJdMiLGpNz3uqyqwzC5w0Fd34E6G94806fwARAQABzSJDw6lkcmljIExl IEdvYXRlciA8Y2xnQHJlZGhhdC5jb20+wsGRBBMBCAA7FiEEoPZlSPBIlev+awtgUaNDx8/7 7KEFAmTLlVECGwMFCwkIBwICIgIGFQoJCAsCBBYCAwECHgcCF4AACgkQUaNDx8/77KG0eg// S0zIzTcxkrwJ/9XgdcvVTnXLVF9V4/tZPfB7sCp8rpDCEseU6O0TkOVFoGWM39sEMiQBSvyY lHrP7p7E/JYQNNLh441MfaX8RJ5Ul3btluLapm8oHp/vbHKV2IhLcpNCfAqaQKdfk8yazYhh EdxTBlzxPcu+78uE5fF4wusmtutK0JG0sAgq0mHFZX7qKG6LIbdLdaQalZ8CCFMKUhLptW71 xe+aNrn7hScBoOj2kTDRgf9CE7svmjGToJzUxgeh9mIkxAxTu7XU+8lmL28j2L5uNuDOq9vl hM30OT+pfHmyPLtLK8+GXfFDxjea5hZLF+2yolE/ATQFt9AmOmXC+YayrcO2ZvdnKExZS1o8 VUKpZgRnkwMUUReaF/mTauRQGLuS4lDcI4DrARPyLGNbvYlpmJWnGRWCDguQ/LBPpbG7djoy k3NlvoeA757c4DgCzggViqLm0Bae320qEc6z9o0X0ePqSU2f7vcuWN49Uhox5kM5L86DzjEQ RHXndoJkeL8LmHx8DM+kx4aZt0zVfCHwmKTkSTQoAQakLpLte7tWXIio9ZKhUGPv/eHxXEoS 0rOOAZ6np1U/xNR82QbF9qr9TrTVI3GtVe7Vxmff+qoSAxJiZQCo5kt0YlWwti2fFI4xvkOi V7lyhOA3+/3oRKpZYQ86Frlo61HU3r6d9wzOwU0EW7yjdQEQALyDNNMw/08/fsyWEWjfqVhW pOOrX2h+z4q0lOHkjxi/FRIRLfXeZjFfNQNLSoL8j1y2rQOs1j1g+NV3K5hrZYYcMs0xhmrZ KXAHjjDx7FW3sG3jcGjFW5Xk4olTrZwFsZVUcP8XZlArLmkAX3UyrrXEWPSBJCXxDIW1hzwp bV/nVbo/K9XBptT/wPd+RPiOTIIRptjypGY+S23HYBDND3mtfTz/uY0Jytaio9GETj+fFis6 TxFjjbZNUxKpwftu/4RimZ7qL+uM1rG1lLWc9SPtFxRQ8uLvLOUFB1AqHixBcx7LIXSKZEFU CSLB2AE4wXQkJbApye48qnZ09zc929df5gU6hjgqV9Gk1rIfHxvTsYltA1jWalySEScmr0iS YBZjw8Nbd7SxeomAxzBv2l1Fk8fPzR7M616dtb3Z3HLjyvwAwxtfGD7VnvINPbzyibbe9c6g LxYCr23c2Ry0UfFXh6UKD83d5ybqnXrEJ5n/t1+TLGCYGzF2erVYGkQrReJe8Mld3iGVldB7 JhuAU1+d88NS3aBpNF6TbGXqlXGF6Yua6n1cOY2Yb4lO/mDKgjXd3aviqlwVlodC8AwI0Sdu jWryzL5/AGEU2sIDQCHuv1QgzmKwhE58d475KdVX/3Vt5I9kTXpvEpfW18TjlFkdHGESM/Jx IqVsqvhAJkalABEBAAHCwV8EGAECAAkFAlu8o3UCGwwACgkQUaNDx8/77KEhwg//WqVopd5k 8hQb9VVdk6RQOCTfo6wHhEqgjbXQGlaxKHoXywEQBi8eULbeMQf5l4+tHJWBxswQ93IHBQjK yKyNr4FXseUI5O20XVNYDJZUrhA4yn0e/Af0IX25d94HXQ5sMTWr1qlSK6Zu79lbH3R57w9j hQm9emQEp785ui3A5U2Lqp6nWYWXz0eUZ0Tad2zC71Gg9VazU9MXyWn749s0nXbVLcLS0yop s302Gf3ZmtgfXTX/W+M25hiVRRKCH88yr6it+OMJBUndQVAA/fE9hYom6t/zqA248j0QAV/p LHH3hSirE1mv+7jpQnhMvatrwUpeXrOiEw1nHzWCqOJUZ4SY+HmGFW0YirWV2mYKoaGO2YBU wYF7O9TI3GEEgRMBIRT98fHa0NPwtlTktVISl73LpgVscdW8yg9Gc82oe8FzU1uHjU8b10lU XOMHpqDDEV9//r4ZhkKZ9C4O+YZcTFu+mvAY3GlqivBNkmYsHYSlFsbxc37E1HpTEaSWsGfA HQoPn9qrDJgsgcbBVc1gkUT6hnxShKPp4PlsZVMNjvPAnr5TEBgHkk54HQRhhwcYv1T2QumQ izDiU6iOrUzBThaMhZO3i927SG2DwWDVzZltKrCMD1aMPvb3NU8FOYRhNmIFR3fcalYr+9gD uVKe8BVz4atMOoktmt0GWTOC8P4= In-Reply-To: <20250607001056.335310-5-john.levon@nutanix.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=170.10.129.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 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_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 6/7/25 02:10, John Levon wrote: > 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: Cédric Le Goater Applied to vfio-next. Thanks, C. > --- > 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); > }; > > void vfio_device_prepare(VFIODevice *vbasedev, VFIOContainerBase *bcontainer, > diff --git a/include/hw/vfio/vfio-region.h b/include/hw/vfio/vfio-region.h > index cbffb26962..ede6e0c8f9 100644 > --- a/include/hw/vfio/vfio-region.h > +++ b/include/hw/vfio/vfio-region.h > @@ -29,6 +29,7 @@ typedef struct VFIORegion { > uint32_t nr_mmaps; > VFIOMmap *mmaps; > uint8_t nr; /* cache the region number for debug */ > + bool post_wr; /* writes can be posted */ > } VFIORegion; > > > diff --git a/hw/vfio/device.c b/hw/vfio/device.c > index 29a8d72deb..ad0bac9765 100644 > --- a/hw/vfio/device.c > +++ b/hw/vfio/device.c > @@ -569,7 +569,8 @@ static int vfio_device_io_region_read(VFIODevice *vbasedev, uint8_t index, > } > > static int vfio_device_io_region_write(VFIODevice *vbasedev, uint8_t index, > - off_t off, uint32_t size, void *data) > + off_t off, uint32_t size, void *data, > + bool post) > { > struct vfio_region_info *info; > int ret; > diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c > index 714d37e227..d68c1412d2 100644 > --- a/hw/vfio/pci.c > +++ b/hw/vfio/pci.c > @@ -1015,7 +1015,7 @@ 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_INDEX, > - offset, size, data); > + offset, size, data, false); > } > > static uint64_t vfio_rom_read(void *opaque, hwaddr addr, unsigned size) > @@ -1819,6 +1819,9 @@ static void vfio_bar_prepare(VFIOPCIDevice *vdev, int nr) > bar->type = pci_bar & (bar->ioport ? ~PCI_BASE_ADDRESS_IO_MASK : > ~PCI_BASE_ADDRESS_MEM_MASK); > bar->size = bar->region.size; > + > + /* IO regions are sync, memory can be async */ > + bar->region.post_wr = (bar->ioport == 0); > } > > static void vfio_bars_prepare(VFIOPCIDevice *vdev) > diff --git a/hw/vfio/region.c b/hw/vfio/region.c > index cb172f2136..f5b8e3cbf1 100644 > --- a/hw/vfio/region.c > +++ b/hw/vfio/region.c > @@ -66,7 +66,7 @@ void vfio_region_write(void *opaque, hwaddr addr, > } > > ret = vbasedev->io_ops->region_write(vbasedev, region->nr, > - addr, size, &buf); > + addr, size, &buf, region->post_wr); > if (ret != 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 = info->size; > region->fd_offset = info->offset; > region->nr = index; > + region->post_wr = false; > > if (region->size) { > region->mem = g_new0(MemoryRegion, 1);