kernel/drivers/vfio/platform/vfio_platform_common.c, branch linux-6.9.y

vfio: platform: ignore missing reset if disabled at module init

2023-02-01T19:25:41Z

If reset requirement was relaxed via module parameter, errors caused by missing reset should not be propagated down to the vfio core. Otherwise initialization will fail. Signed-off-by: Tomasz Duszynski Fixes: 5f6c7e0831a1 ("vfio/platform: Use the new device life cycle helpers") Reviewed-by: Kevin Tian Reviewed-by: Eric Auger Link: https://lore.kernel.org/r/20230131083349.2027189-1-tduszynski@marvell.com Signed-off-by: Alex Williamson

vfio/platform: Use GFP_KERNEL_ACCOUNT for userspace persistent allocations

2023-01-23T18:26:30Z

Use GFP_KERNEL_ACCOUNT for userspace persistent allocations. The GFP_KERNEL_ACCOUNT option lets the memory allocator know that this is untrusted allocation triggered from userspace and should be a subject of kmem accounting, and as such it is controlled by the cgroup mechanism. Signed-off-by: Yishai Hadas Reviewed-by: Jason Gunthorpe Link: https://lore.kernel.org/r/20230108154427.32609-7-yishaih@nvidia.com Signed-off-by: Alex Williamson

vfio: platform: No need to check res again

2023-01-23T18:26:28Z

In function vfio_platform_regions_init(),we did check res implied by using while loop, so no need to check whether res be null or not again. No functional change intended. Signed-off-by: Angus Chen Reviewed-by: Eric Auger Link: https://lore.kernel.org/r/20230107034721.2127-1-angus.chen@jaguarmicro.com Signed-off-by: Alex Williamson

vfio: platform: Do not pass return buffer to ACPI _RST method

2022-11-09T23:39:51Z

The ACPI _RST method has no return value, there's no need to pass a return buffer to acpi_evaluate_object(). Fixes: d30daa33ec1d ("vfio: platform: call _RST method when using ACPI") Signed-off-by: Rafael Mendonca Reviewed-by: Eric Auger Link: https://lore.kernel.org/r/20221018152825.891032-1-rafaelmendsr@gmail.com Signed-off-by: Alex Williamson

vfio/amba: Use the new device life cycle helpers

2022-09-21T20:15:11Z

Implement amba's own vfio_device_ops. Remove vfio_platform_probe/remove_common() given no user now. Signed-off-by: Kevin Tian Reviewed-by: Jason Gunthorpe Reviewed-by: Eric Auger Link: https://lore.kernel.org/r/20220921104401.38898-13-kevin.tian@intel.com Signed-off-by: Alex Williamson

vfio/platform: Use the new device life cycle helpers

2022-09-21T20:15:11Z

Move vfio_device_ops from platform core to platform drivers so device specific init/cleanup can be added. Introduce two new helpers vfio_platform_init/release_common() for the use in driver @init/@release. vfio_platform_probe/remove_common() will be deprecated. Signed-off-by: Kevin Tian Reviewed-by: Jason Gunthorpe Reviewed-by: Eric Auger Tested-by: Eric Auger Link: https://lore.kernel.org/r/20220921104401.38898-12-kevin.tian@intel.com Signed-off-by: Alex Williamson

vfio: Move vfio_iommu_group_get() to vfio_register_group_dev()

2021-09-30T18:46:43Z

We don't need to hold a reference to the group in the driver as well as obtain a reference to the same group as the first thing vfio_register_group_dev() does. Since the drivers never use the group move this all into the core code. Signed-off-by: Jason Gunthorpe Signed-off-by: Christoph Hellwig Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20210924155705.4258-2-hch@lst.de Signed-off-by: Alex Williamson

vfio/platform: Use open_device() instead of open coding a refcnt scheme

2021-08-11T15:50:11Z

Platform simply wants to run some code when the device is first opened/last closed. Use the core framework and locking for this. Aside from removing a bit of code this narrows the locking scope from a global lock. Reviewed-by: Cornelia Huck Reviewed-by: Eric Auger Reviewed-by: Christoph Hellwig Signed-off-by: Jason Gunthorpe Signed-off-by: Yishai Hadas Link: https://lore.kernel.org/r/7-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com Signed-off-by: Alex Williamson

vfio: Introduce a vfio_uninit_group_dev() API call

2021-08-11T15:50:10Z

This pairs with vfio_init_group_dev() and allows undoing any state that is stored in the vfio_device unrelated to registration. Add appropriately placed calls to all the drivers. The following patch will use this to add pre-registration state for the device set. Signed-off-by: Max Gurtovoy Reviewed-by: Cornelia Huck Reviewed-by: Christoph Hellwig Signed-off-by: Jason Gunthorpe Link: https://lore.kernel.org/r/3-v4-9ea22c5e6afb+1adf-vfio_reflck_jgg@nvidia.com Signed-off-by: Alex Williamson

vfio: centralize module refcount in subsystem layer

2021-06-15T20:12:15Z

Remove code duplication and move module refcounting to the subsystem module. Signed-off-by: Max Gurtovoy Reviewed-by: Eric Auger Link: https://lore.kernel.org/r/20210518192133.59195-2-mgurtovoy@nvidia.com Signed-off-by: Alex Williamson