linux/samples/vfio-mdev, branch v4.19

sample: vfio-mdev: avoid deadlock in mdev_access()

2018-07-11T19:22:41Z

mdev_access() calls mbochs_get_page() with mdev_state->ops_lock held, while mbochs_get_page() locks the mutex by itself. It leads to unavoidable deadlock. Found by Linux Driver Verification project (linuxtesting.org). Signed-off-by: Alexey Khoroshilov Signed-off-by: Alex Williamson

sample/vfio-mdev: Change return type to vm_fault_t

2018-07-04T16:42:04Z

convert mbochs_region_vm_fault and mbochs_dmabuf_vm_fault to return vm_fault_t type. Signed-off-by: Souptick Joarder Signed-off-by: Alex Williamson

sample/mdev/mbochs: add mbochs_kunmap_dmabuf

2018-06-26T06:27:23Z

There is no default implementation for dma_buf_ops->unmap. So add a function unmapping the page, otherwise we'll leak them. Signed-off-by: Gerd Hoffmann Signed-off-by: Alex Williamson

sample/mdev/mbochs: remove mbochs_kmap_atomic_dmabuf

2018-06-26T06:27:22Z

Atomic mapping interface for dmabufs will be removed. Signed-off-by: Gerd Hoffmann Signed-off-by: Alex Williamson

sample: vfio bochs vbe display (host device for bochs-drm)

2018-06-08T16:24:16Z

Display device, demo-ing the vfio dmabuf display interface (VFIO_GFX_PLANE_TYPE_DMABUF). Compatible enough to qemu stdvga that bochs-drm.ko can be used as guest driver. Signed-off-by: Gerd Hoffmann Signed-off-by: Alex Williamson

sample: vfio mdev display - guest driver

2018-06-08T16:24:13Z

Guest fbdev driver for CONFIG_SAMPLE_VFIO_MDEV_MDPY. Signed-off-by: Gerd Hoffmann Signed-off-by: Alex Williamson

sample: vfio mdev display - host device

2018-06-08T16:24:09Z

Simple framebuffer display, demo-ing the vfio region display interface (VFIO_GFX_PLANE_TYPE_REGION). Signed-off-by: Gerd Hoffmann Signed-off-by: Alex Williamson

vfio-mdev/samples: change RDI interrupt condition

2018-03-22T19:18:18Z

When FIFO mode is enabled, the receive data available interrupt (UART_IIR_RDI in code) should be triggered when the number of data in FIFO is equal or larger than interrupt trigger level. This patch changes the trigger level check to ensure multiple bytes received from upper layer can trigger RDI interrupt correctly. Cc: Joey Zheng Signed-off-by: Shunyong Yang Reviewed by: Kirti Wankhede Signed-off-by: Alex Williamson

vfio-mdev/samples: make mdev_fops const and static

2017-10-02T18:40:05Z

Make this const as it is only passed to a const argument of the function mdev_register_device. Make it static as it is not referenced in any other file. Structure found using Coccinelle and changes done by hand. Signed-off-by: Bhumika Goyal Signed-off-by: Alex Williamson

vfio-mdev: remove some dead code

2017-01-11T19:12:37Z

We set info.count to 1 in mtty_get_irq_info() so static checkers complain that, "Why do we have impossible conditions?" The answer is that it seems to be left over dead code that can be safely removed. Signed-off-by: Dan Carpenter Reviewed-by: Kirti Wankhede Signed-off-by: Alex Williamson