blaster4385/linux-IllusionX/drivers/vfio, branch v6.12.1

[tree-wide] finally take no_llseek out

2024-09-27T15:18:43Z

no_llseek had been defined to NULL two years ago, in commit 868941b14441 ("fs: remove no_llseek") To quote that commit, At -rc1 we'll need do a mechanical removal of no_llseek - git grep -l -w no_llseek | grep -v porting.rst | while read i; do sed -i '/\/d' $i done would do it. Unfortunately, that hadn't been done. Linus, could you do that now, so that we could finally put that thing to rest? All instances are of the form .llseek = no_llseek, so it's obviously safe. Signed-off-by: Al Viro Signed-off-by: Linus Torvalds

Merge tag 'vfio-v6.12-rc1' of https://github.com/awilliam/linux-vfio

2024-09-24T19:07:47Z

Pull VFIO updates from Alex Williamson: "Just a few cleanups this cycle: - Remove several unused structure and function declarations, and unused variables (Dr. David Alan Gilbert, Yue Haibing, Zhang Zekun) - Constify unmodified structure in mdev (Hongbo Li) - Convert to unsigned type to catch overflow with less fanfare than passing a negative value to kcalloc() (Dan Carpenter)" * tag 'vfio-v6.12-rc1' of https://github.com/awilliam/linux-vfio: vfio/pci: clean up a type in vfio_pci_ioctl_pci_hot_reset_groups() vfio/mdev: Constify struct kobj_type vfio: mdev: Remove unused function declarations vfio/fsl-mc: Remove unused variable 'hwirq' vfio/pci: Remove unused struct 'vfio_pci_mmap_vma'

Merge tag 'pull-stable-struct_fd' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2024-09-23T16:35:36Z

Pull 'struct fd' updates from Al Viro: "Just the 'struct fd' layout change, with conversion to accessor helpers" * tag 'pull-stable-struct_fd' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: add struct fd constructors, get rid of __to_fd() struct fd: representation change introduce fd_file(), convert all accessors to it.

vfio/pci: implement huge_fault support

2024-09-17T08:07:00Z

With the addition of pfnmap support in vmf_insert_pfn_{pmd,pud}() we can take advantage of PMD and PUD faults to PCI BAR mmaps and create more efficient mappings. PCI BARs are always a power of two and will typically get at least PMD alignment without userspace even trying. Userspace alignment for PUD mappings is also not too difficult. Consolidate faults through a single handler with a new wrapper for standard single page faults. The pre-faulting behavior of commit d71a989cf5d9 ("vfio/pci: Insert full vma on mmap'd MMIO fault") is removed in this refactoring since huge_fault will cover the bulk of the faults and results in more efficient page table usage. We also want to avoid that pre-faulted single page mappings preempt huge page mappings. Link: https://lkml.kernel.org/r/20240826204353.2228736-20-peterx@redhat.com Signed-off-by: Alex Williamson Signed-off-by: Peter Xu Cc: Alexander Gordeev Cc: Aneesh Kumar K.V Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Dave Hansen Cc: David Hildenbrand Cc: Gavin Shan Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Ingo Molnar Cc: Jason Gunthorpe Cc: Matthew Wilcox Cc: Niklas Schnelle Cc: Paolo Bonzini Cc: Ryan Roberts Cc: Sean Christopherson Cc: Sven Schnelle Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Cc: Zi Yan Signed-off-by: Andrew Morton

vfio: use the new follow_pfnmap API

2024-09-17T08:06:59Z

Use the new API that can understand huge pfn mappings. Link: https://lkml.kernel.org/r/20240826204353.2228736-14-peterx@redhat.com Signed-off-by: Peter Xu Cc: Alex Williamson Cc: Jason Gunthorpe Cc: Alexander Gordeev Cc: Aneesh Kumar K.V Cc: Borislav Petkov Cc: Catalin Marinas Cc: Christian Borntraeger Cc: Dave Hansen Cc: David Hildenbrand Cc: Gavin Shan Cc: Gerald Schaefer Cc: Heiko Carstens Cc: Ingo Molnar Cc: Matthew Wilcox Cc: Niklas Schnelle Cc: Paolo Bonzini Cc: Ryan Roberts Cc: Sean Christopherson Cc: Sven Schnelle Cc: Thomas Gleixner Cc: Vasily Gorbik Cc: Will Deacon Cc: Zi Yan Signed-off-by: Andrew Morton

vfio/pci: clean up a type in vfio_pci_ioctl_pci_hot_reset_groups()

2024-09-12T20:15:07Z

The "array_count" value comes from the copy_from_user() in vfio_pci_ioctl_pci_hot_reset(). If the user passes a value larger than INT_MAX then we'll pass a negative value to kcalloc() which triggers an allocation failure and a stack trace. It's better to make the type unsigned so that if (array_count > count) returns -EINVAL instead. Signed-off-by: Dan Carpenter Reviewed-by: Jason Gunthorpe Link: https://lore.kernel.org/r/262ada03-d848-4369-9c37-81edeeed2da2@stanley.mountain Signed-off-by: Alex Williamson

vfio/mdev: Constify struct kobj_type

2024-09-06T14:20:52Z

This 'struct kobj_type' is not modified. It is only used in kobject_init_and_add() which takes a 'const struct kobj_type *ktype' parameter. Constifying this structure and moving it to a read-only section, and this can increase over all security. ``` [Before] text data bss dec hex filename 2372 600 0 2972 b9c drivers/vfio/mdev/mdev_sysfs.o [After] text data bss dec hex filename 2436 568 0 3004 bbc drivers/vfio/mdev/mdev_sysfs.o ``` Signed-off-by: Hongbo Li Reviewed-by: Jason Gunthorpe Link: https://lore.kernel.org/r/20240904011837.2010444-1-lihongbo22@huawei.com Signed-off-by: Alex Williamson

vfio: mdev: Remove unused function declarations

2024-09-03T14:42:07Z

The definition of mdev_bus_register() and mdev_bus_unregister() have been removed since commit 6c7f98b334a3 ("vfio/mdev: Remove vfio_mdev.c"). So, let's remove the unused declarations. Signed-off-by: Zhang Zekun Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20240812120823.10968-1-zhangzekun11@huawei.com Signed-off-by: Alex Williamson

vfio/fsl-mc: Remove unused variable 'hwirq'

2024-09-03T14:42:06Z

Commit 7447d911af69 ("vfio/fsl-mc: Block calling interrupt handler without trigger") left this variable unused, so remove it. Signed-off-by: Yue Haibing Link: https://lore.kernel.org/r/20240730141133.525771-1-yuehaibing@huawei.com Signed-off-by: Alex Williamson

vfio/pci: Remove unused struct 'vfio_pci_mmap_vma'

2024-09-03T14:42:06Z

'vfio_pci_mmap_vma' has been unused since commit aac6db75a9fc ("vfio/pci: Use unmap_mapping_range()") Remove it. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Link: https://lore.kernel.org/r/20240727160307.1000476-1-linux@treblig.org Signed-off-by: Alex Williamson