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[34.140.140.54]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4773c374f84sm144508145e9.0.2025.11.03.01.53.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Nov 2025 01:53:48 -0800 (PST) Date: Mon, 3 Nov 2025 09:53:45 +0000 From: Mostafa Saleh To: Jason Gunthorpe Cc: Alexander Gordeev , David Airlie , Alex Williamson , Ankit Agrawal , Christian Borntraeger , Brett Creeley , dri-devel@lists.freedesktop.org, Eric Auger , Eric Farman , Giovanni Cabiddu , Vasily Gorbik , Heiko Carstens , intel-gfx@lists.freedesktop.org, Jani Nikula , Joonas Lahtinen , Kevin Tian , kvm@vger.kernel.org, Kirti Wankhede , linux-s390@vger.kernel.org, Longfang Liu , Matthew Rosato , Nikhil Agarwal , Nipun Gupta , Peter Oberparleiter , Halil Pasic , Pranjal Shrivastava , qat-linux@intel.com, Rodrigo Vivi , Simona Vetter , Shameer Kolothum , Sven Schnelle , Tvrtko Ursulin , virtualization@lists.linux.dev, Vineeth Vijayan , Yishai Hadas , Zhenyu Wang , Zhi Wang , patches@lists.linux.dev Subject: Re: [PATCH 09/22] vfio/platform: Provide a get_region_info op Message-ID: References: <0-v1-679a6fa27d31+209-vfio_get_region_info_op_jgg@nvidia.com> <9-v1-679a6fa27d31+209-vfio_get_region_info_op_jgg@nvidia.com> Precedence: bulk X-Mailing-List: virtualization@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <9-v1-679a6fa27d31+209-vfio_get_region_info_op_jgg@nvidia.com> On Thu, Oct 23, 2025 at 08:09:23PM -0300, Jason Gunthorpe wrote: > Move it out of vfio_platform_ioctl() and re-indent it. Add it to all > platform drivers. > > Signed-off-by: Jason Gunthorpe Reviewed-by: Mostafa Saleh Thanks, Mostafa > --- > drivers/vfio/platform/vfio_amba.c | 1 + > drivers/vfio/platform/vfio_platform.c | 1 + > drivers/vfio/platform/vfio_platform_common.c | 50 +++++++++++-------- > drivers/vfio/platform/vfio_platform_private.h | 2 + > 4 files changed, 32 insertions(+), 22 deletions(-) > > diff --git a/drivers/vfio/platform/vfio_amba.c b/drivers/vfio/platform/vfio_amba.c > index 9f5c527baa8a36..d600deaf23b6d7 100644 > --- a/drivers/vfio/platform/vfio_amba.c > +++ b/drivers/vfio/platform/vfio_amba.c > @@ -115,6 +115,7 @@ static const struct vfio_device_ops vfio_amba_ops = { > .open_device = vfio_platform_open_device, > .close_device = vfio_platform_close_device, > .ioctl = vfio_platform_ioctl, > + .get_region_info = vfio_platform_ioctl_get_region_info, > .read = vfio_platform_read, > .write = vfio_platform_write, > .mmap = vfio_platform_mmap, > diff --git a/drivers/vfio/platform/vfio_platform.c b/drivers/vfio/platform/vfio_platform.c > index 512533501eb7f3..0e85c914b65105 100644 > --- a/drivers/vfio/platform/vfio_platform.c > +++ b/drivers/vfio/platform/vfio_platform.c > @@ -101,6 +101,7 @@ static const struct vfio_device_ops vfio_platform_ops = { > .open_device = vfio_platform_open_device, > .close_device = vfio_platform_close_device, > .ioctl = vfio_platform_ioctl, > + .get_region_info = vfio_platform_ioctl_get_region_info, > .read = vfio_platform_read, > .write = vfio_platform_write, > .mmap = vfio_platform_mmap, > diff --git a/drivers/vfio/platform/vfio_platform_common.c b/drivers/vfio/platform/vfio_platform_common.c > index 3bf1043cd7957c..3ebd50fb78fbb7 100644 > --- a/drivers/vfio/platform/vfio_platform_common.c > +++ b/drivers/vfio/platform/vfio_platform_common.c > @@ -272,6 +272,34 @@ int vfio_platform_open_device(struct vfio_device *core_vdev) > } > EXPORT_SYMBOL_GPL(vfio_platform_open_device); > > +int vfio_platform_ioctl_get_region_info(struct vfio_device *core_vdev, > + struct vfio_region_info __user *arg) > +{ > + struct vfio_platform_device *vdev = > + container_of(core_vdev, struct vfio_platform_device, vdev); > + struct vfio_region_info info; > + unsigned long minsz; > + > + minsz = offsetofend(struct vfio_region_info, offset); > + > + if (copy_from_user(&info, arg, minsz)) > + return -EFAULT; > + > + if (info.argsz < minsz) > + return -EINVAL; > + > + if (info.index >= vdev->num_regions) > + return -EINVAL; > + > + /* map offset to the physical address */ > + info.offset = VFIO_PLATFORM_INDEX_TO_OFFSET(info.index); > + info.size = vdev->regions[info.index].size; > + info.flags = vdev->regions[info.index].flags; > + > + return copy_to_user(arg, &info, minsz) ? -EFAULT : 0; > +} > +EXPORT_SYMBOL_GPL(vfio_platform_ioctl_get_region_info); > + > long vfio_platform_ioctl(struct vfio_device *core_vdev, > unsigned int cmd, unsigned long arg) > { > @@ -300,28 +328,6 @@ long vfio_platform_ioctl(struct vfio_device *core_vdev, > return copy_to_user((void __user *)arg, &info, minsz) ? > -EFAULT : 0; > > - } else if (cmd == VFIO_DEVICE_GET_REGION_INFO) { > - struct vfio_region_info info; > - > - minsz = offsetofend(struct vfio_region_info, offset); > - > - if (copy_from_user(&info, (void __user *)arg, minsz)) > - return -EFAULT; > - > - if (info.argsz < minsz) > - return -EINVAL; > - > - if (info.index >= vdev->num_regions) > - return -EINVAL; > - > - /* map offset to the physical address */ > - info.offset = VFIO_PLATFORM_INDEX_TO_OFFSET(info.index); > - info.size = vdev->regions[info.index].size; > - info.flags = vdev->regions[info.index].flags; > - > - return copy_to_user((void __user *)arg, &info, minsz) ? > - -EFAULT : 0; > - > } else if (cmd == VFIO_DEVICE_GET_IRQ_INFO) { > struct vfio_irq_info info; > > diff --git a/drivers/vfio/platform/vfio_platform_private.h b/drivers/vfio/platform/vfio_platform_private.h > index 8d8fab51684909..a6008320e77bae 100644 > --- a/drivers/vfio/platform/vfio_platform_private.h > +++ b/drivers/vfio/platform/vfio_platform_private.h > @@ -85,6 +85,8 @@ int vfio_platform_open_device(struct vfio_device *core_vdev); > void vfio_platform_close_device(struct vfio_device *core_vdev); > long vfio_platform_ioctl(struct vfio_device *core_vdev, > unsigned int cmd, unsigned long arg); > +int vfio_platform_ioctl_get_region_info(struct vfio_device *core_vdev, > + struct vfio_region_info __user *arg); > ssize_t vfio_platform_read(struct vfio_device *core_vdev, > char __user *buf, size_t count, > loff_t *ppos); > -- > 2.43.0 >