pm24.git/drivers/vfio, branch v5.10

vfio/pci: Bypass IGD init in case of -ENODEV

2020-11-03T18:07:40Z

Bypass the IGD initialization when -ENODEV returns, that should be the case if opregion is not available for IGD or within discrete graphics device's option ROM, or host/lpc bridge is not found. Then use of -ENODEV here means no special device resources found which needs special care for VFIO, but we still allow other normal device resource access. Cc: Zhenyu Wang Cc: Xiong Zhang Cc: Hang Yuan Cc: Stuart Summers Signed-off-by: Fred Gao Signed-off-by: Alex Williamson

vfio: platform: fix reference leak in vfio_platform_open

2020-11-03T18:07:40Z

pm_runtime_get_sync() will increment pm usage counter even it failed. Forgetting to call pm_runtime_put will result in reference leak in vfio_platform_open, so we should fix it. Signed-off-by: Zhang Qilong Acked-by: Eric Auger Signed-off-by: Alex Williamson

vfio/pci: Implement ioeventfd thread handler for contended memory lock

2020-11-03T18:07:40Z

The ioeventfd is called under spinlock with interrupts disabled, therefore if the memory lock is contended defer code that might sleep to a thread context. Fixes: bc93b9ae0151 ("vfio-pci: Avoid recursive read-lock usage") Link: https://bugzilla.kernel.org/show_bug.cgi?id=209253#c1 Reported-by: Ian Pilcher Tested-by: Ian Pilcher Tested-by: Justin Gatzen Signed-off-by: Alex Williamson

vfio/fsl-mc: Make vfio_fsl_mc_irqs_allocate static

2020-11-03T18:07:40Z

Fixed compiler warning: drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c:16:5: warning: no previous prototype for function 'vfio_fsl_mc_irqs_allocate' [-Wmissing-prototypes] ^ drivers/vfio/fsl-mc/vfio_fsl_mc_intr.c:16:1: note: declare 'static' if the function is not intended to be used outside of this translation unit int vfio_fsl_mc_irqs_allocate(struct vfio_fsl_mc_device *vdev) Reported-by: kernel test robot Signed-off-by: Diana Craciun Signed-off-by: Alex Williamson

vfio/fsl-mc: prevent underflow in vfio_fsl_mc_mmap()

2020-11-03T18:07:19Z

My static analsysis tool complains that the "index" can be negative. There are some checks in do_mmap() which try to prevent underflows but I don't know if they are sufficient for this situation. Either way, making "index" unsigned is harmless so let's do it just to be safe. Fixes: 67247289688d ("vfio/fsl-mc: Allow userspace to MMAP fsl-mc device MMIO regions") Signed-off-by: Dan Carpenter Acked-by: Diana Craciun Signed-off-by: Alex Williamson

vfio/fsl-mc: return -EFAULT if copy_to_user() fails

2020-11-02T22:00:06Z

The copy_to_user() function returns the number of bytes remaining to be copied, but this code should return -EFAULT. Fixes: df747bcd5b21 ("vfio/fsl-mc: Implement VFIO_DEVICE_GET_REGION_INFO ioctl call") Signed-off-by: Dan Carpenter Acked-by: Diana Craciun Signed-off-by: Alex Williamson

vfio/type1: Use the new helper to find vfio_group

2020-11-02T21:58:29Z

When attaching a new group to the container, let's use the new helper vfio_iommu_find_iommu_group() to check if it's already attached. There is no functional change. Also take this chance to add a missing blank line. Signed-off-by: Zenghui Yu Signed-off-by: Alex Williamson

Merge tag 'vfio-v5.10-rc1' of git://github.com/awilliam/linux-vfio

2020-10-22T20:00:44Z

Pull VFIO updates from Alex Williamson: - New fsl-mc vfio bus driver supporting userspace drivers of objects within NXP's DPAA2 architecture (Diana Craciun) - Support for exposing zPCI information on s390 (Matthew Rosato) - Fixes for "detached" VFs on s390 (Matthew Rosato) - Fixes for pin-pages and dma-rw accesses (Yan Zhao) - Cleanups and optimize vconfig regen (Zenghui Yu) - Fix duplicate irq-bypass token registration (Alex Williamson) * tag 'vfio-v5.10-rc1' of git://github.com/awilliam/linux-vfio: (30 commits) vfio iommu type1: Fix memory leak in vfio_iommu_type1_pin_pages vfio/pci: Clear token on bypass registration failure vfio/fsl-mc: fix the return of the uninitialized variable ret vfio/fsl-mc: Fix the dead code in vfio_fsl_mc_set_irq_trigger vfio/fsl-mc: Fixed vfio-fsl-mc driver compilation on 32 bit MAINTAINERS: Add entry for s390 vfio-pci vfio-pci/zdev: Add zPCI capabilities to VFIO_DEVICE_GET_INFO vfio/fsl-mc: Add support for device reset vfio/fsl-mc: Add read/write support for fsl-mc devices vfio/fsl-mc: trigger an interrupt via eventfd vfio/fsl-mc: Add irq infrastructure for fsl-mc devices vfio/fsl-mc: Added lock support in preparation for interrupt handling vfio/fsl-mc: Allow userspace to MMAP fsl-mc device MMIO regions vfio/fsl-mc: Implement VFIO_DEVICE_GET_REGION_INFO ioctl call vfio/fsl-mc: Implement VFIO_DEVICE_GET_INFO ioctl vfio/fsl-mc: Scan DPRC objects on vfio-fsl-mc driver bind vfio: Introduce capability definitions for VFIO_DEVICE_GET_INFO s390/pci: track whether util_str is valid in the zpci_dev s390/pci: stash version in the zpci_dev vfio/fsl-mc: Add VFIO framework skeleton for fsl-mc devices ...

vfio iommu type1: Fix memory leak in vfio_iommu_type1_pin_pages

2020-10-20T16:12:17Z

pfn is not added to pfn_list when vfio_add_to_pfn_list fails. vfio_unpin_page_external will exit directly without calling vfio_iova_put_vfio_pfn. This will lead to a memory leak. Fixes: a54eb55045ae ("vfio iommu type1: Add support for mediated devices") Signed-off-by: Xiaoyang Xu [aw: simplified logic, add Fixes] Signed-off-by: Alex Williamson

vfio/pci: Clear token on bypass registration failure

2020-10-19T13:13:55Z

The eventfd context is used as our irqbypass token, therefore if an eventfd is re-used, our token is the same. The irqbypass code will return an -EBUSY in this case, but we'll still attempt to unregister the producer, where if that duplicate token still exists, results in removing the wrong object. Clear the token of failed producers so that they harmlessly fall out when unregistered. Fixes: 6d7425f109d2 ("vfio: Register/unregister irq_bypass_producer") Reported-by: guomin chen Tested-by: guomin chen Signed-off-by: Alex Williamson