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Commit b779157d authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge tag 'vfio-v4.2-rc1' of git://github.com/awilliam/linux-vfio 

Pull VFIO updates from Alex Williamson:

 - fix race with device reference versus driver release (Alex Williamson)

 - add reset hooks and Calxeda xgmac reset for vfio-platform (Eric Auger)

 - enable vfio-platform for ARM64 (Eric Auger)

 - tag Baptiste Reynal as vfio-platform sub-maintainer (Alex Williamson)

* tag 'vfio-v4.2-rc1' of git://github.com/awilliam/linux-vfio:
  MAINTAINERS: Add vfio-platform sub-maintainer
  VFIO: platform: enable ARM64 build
  VFIO: platform: Calxeda xgmac reset module
  VFIO: platform: populate the reset function on probe
  VFIO: platform: add reset callback
  VFIO: platform: add reset struct and lookup table
  vfio/pci: Fix racy vfio_device_get_from_dev() call
parents 4a10a917 a714ea5f

MAINTAINERS

+6 −0
Original line number Diff line number Diff line
@@ -10786,6 +10786,12 @@ F: drivers/vfio/ 
F:	include/linux/vfio.h

F:	include/uapi/linux/vfio.h



VFIO PLATFORM DRIVER

M:	Baptiste Reynal <b.reynal@virtualopensystems.com>

L:	kvm@vger.kernel.org

S:	Maintained

F:	drivers/vfio/platform/



VIDEOBUF2 FRAMEWORK

M:	Pawel Osciak <pawel@osciak.com>

M:	Marek Szyprowski <m.szyprowski@samsung.com>

drivers/vfio/pci/vfio_pci.c

+9 −7
Original line number Diff line number Diff line
@@ -1056,19 +1056,21 @@ struct vfio_devices { 
static int vfio_pci_get_devs(struct pci_dev *pdev, void *data)

{

	struct vfio_devices *devs = data;

	struct pci_driver *pci_drv = ACCESS_ONCE(pdev->driver);



	if (pci_drv != &vfio_pci_driver)

		return -EBUSY;

	struct vfio_device *device;



	if (devs->cur_index == devs->max_index)

		return -ENOSPC;



	devs->devices[devs->cur_index] = vfio_device_get_from_dev(&pdev->dev);

	if (!devs->devices[devs->cur_index])

	device = vfio_device_get_from_dev(&pdev->dev);

	if (!device)

		return -EINVAL;



	devs->cur_index++;

	if (pci_dev_driver(pdev) != &vfio_pci_driver) {

		vfio_device_put(device);

		return -EBUSY;

	}



	devs->devices[devs->cur_index++] = device;

	return 0;

}

drivers/vfio/platform/Kconfig

+3 −1
Original line number Diff line number Diff line 
config VFIO_PLATFORM

	tristate "VFIO support for platform devices"

	depends on VFIO && EVENTFD && ARM

	depends on VFIO && EVENTFD && (ARM || ARM64)

	select VFIO_VIRQFD

	help

	  Support for platform devices with VFIO. This is required to make
@@ -18,3 +18,5 @@ config VFIO_AMBA 
	  framework.



	  If you don't know what to do here, say N.



source "drivers/vfio/platform/reset/Kconfig"

drivers/vfio/platform/Makefile

+2 −0
Original line number Diff line number Diff line
@@ -2,7 +2,9 @@ 
vfio-platform-y := vfio_platform.o vfio_platform_common.o vfio_platform_irq.o



obj-$(CONFIG_VFIO_PLATFORM) += vfio-platform.o

obj-$(CONFIG_VFIO_PLATFORM) += reset/



vfio-amba-y := vfio_amba.o



obj-$(CONFIG_VFIO_AMBA) += vfio-amba.o

obj-$(CONFIG_VFIO_AMBA) += reset/

drivers/vfio/platform/reset/Kconfig

0 → 100644
+7 −0
Original line number Diff line number Diff line 
config VFIO_PLATFORM_CALXEDAXGMAC_RESET

	tristate "VFIO support for calxeda xgmac reset"

	depends on VFIO_PLATFORM

	help

	  Enables the VFIO platform driver to handle reset for Calxeda xgmac



	  If you don't know what to do here, say N.