user/sven/linux.git/drivers/misc/mic, branch v5.8

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

2020-06-10T20:42:09Z

Pull virtio updates from Michael Tsirkin: - virtio-mem: paravirtualized memory hotplug - support doorbell mapping for vdpa - config interrupt support in ifc - fixes all over the place * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (40 commits) vhost/test: fix up after API change virtio_mem: convert device block size into 64bit virtio-mem: drop unnecessary initialization ifcvf: implement config interrupt in IFCVF vhost: replace -1 with VHOST_FILE_UNBIND in ioctls vhost_vdpa: Support config interrupt in vdpa ifcvf: ignore continuous setting same status value virtio-mem: Don't rely on implicit compiler padding for requests virtio-mem: Try to unplug the complete online memory block first virtio-mem: Use -ETXTBSY as error code if the device is busy virtio-mem: Unplug subblocks right-to-left virtio-mem: Drop manual check for already present memory virtio-mem: Add parent resource for all added "System RAM" virtio-mem: Better retry handling virtio-mem: Offline and remove completely unplugged memory blocks mm/memory_hotplug: Introduce offline_and_remove_memory() virtio-mem: Allow to offline partially unplugged memory blocks mm: Allow to offline unmovable PageOffline() pages via MEM_GOING_OFFLINE virtio-mem: Paravirtualized memory hotunplug part 2 virtio-mem: Paravirtualized memory hotunplug part 1 ...

vhost: revert "vhost: disable for OABI"

2020-06-02T06:45:13Z

This reverts commit d085eb8ce727 ("vhost: disable for OABI") With commit "virtio: force spec specified alignment on types" in place, we force proper alignment for all structures, so there's no longer a reason to blacklist OABI. Signed-off-by: Michael S. Tsirkin

drivers/mic/scif: convert get_user_pages() --> pin_user_pages()

2020-05-19T14:46:12Z

This code was using get_user_pages*(), in a "Case 2" scenario (DMA/RDMA), using the categorization from [1]. That means that it's time to convert the get_user_pages*() + put_page() calls to pin_user_pages*() + unpin_user_pages() calls. There is some helpful background in [2]: basically, this is a small part of fixing a long-standing disconnect between pinning pages, and file systems' use of those pages. Note that this effectively changes the code's behavior as well: it now ultimately calls set_page_dirty_lock(), instead of SetPageDirty(). This is probably more accurate. As Christoph Hellwig put it, "set_page_dirty() is only safe if we are dealing with a file backed page where we have reference on the inode it hangs off." [3] [1] Documentation/core-api/pin_user_pages.rst [2] "Explicit pinning of user-space pages": https://lwn.net/Articles/807108/ [3] https://lore.kernel.org/r/20190723153640.GB720@lst.de Signed-off-by: John Hubbard Link: https://lore.kernel.org/r/20200518041307.1987328-1-jhubbard@nvidia.com Signed-off-by: Greg Kroah-Hartman

Merge 5.7-rc3 into char-misc-next

2020-04-27T07:34:02Z

We need the fixes in here as well. Signed-off-by: Greg Kroah-Hartman

misc: mic: correct a typo

2020-04-23T14:32:51Z

The word "Dont" is incorrect and should be replaced with "Don't". Signed-off-by: Hu Haowen Link: https://lore.kernel.org/r/20200330094519.17299-1-xianfengting221@163.com Signed-off-by: Greg Kroah-Hartman

vhost: disable for OABI

2020-04-20T14:19:22Z

vhost is currently broken on the some ARM configs. The reason is that the ring element addresses are passed between components with different alignments assumptions. Thus, if guest selects a pointer and host then gets and dereferences it, then alignment assumed by the host's compiler might be greater than the actual alignment of the pointer. compiler on the host from assuming pointer is aligned. This actually triggers on ARM with -mabi=apcs-gnu - which is a deprecated configuration. With this OABI, compiler assumes that all structures are 4 byte aligned - which is stronger than virtio guarantees for available and used rings, which are merely 2 bytes. Thus a guest without -mabi=apcs-gnu running on top of host with -mabi=apcs-gnu will be broken. The correct fix is to force alignment of structures - however that is an intrusive fix that's best deferred until the next release. We didn't previously support such ancient systems at all - this surfaced after vdpa support prompted removing dependency of vhost on VIRTULIZATION. So for now, let's just add something along the lines of depends on !ARM || AEABI to the virtio Kconfig declaration, and add a comment that it has to do with struct member alignment. Note: we can't make VHOST and VHOST_RING themselves have a dependency since these are selected. Add a new symbol for that. We should be able to drop this dependency down the road. Fixes: 20c384f1ea1a0bc7 ("vhost: refine vhost and vringh kconfig") Suggested-by: Ard Biesheuvel Suggested-by: Richard Earnshaw Signed-off-by: Michael S. Tsirkin

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

2020-04-08T17:51:53Z

Pull virtio updates from Michael Tsirkin: - Some bug fixes - The new vdpa subsystem with two first drivers * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: virtio-balloon: Revert "virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM" vdpa: move to drivers/vdpa virtio: Intel IFC VF driver for VDPA vdpasim: vDPA device simulator vhost: introduce vDPA-based backend virtio: introduce a vDPA based transport vDPA: introduce vDPA bus vringh: IOTLB support vhost: factor out IOTLB vhost: allow per device message handler vhost: refine vhost and vringh kconfig virtio-balloon: Switch back to OOM handler for VIRTIO_BALLOON_F_DEFLATE_ON_OOM virtio-net: Introduce hash report feature virtio-net: Introduce RSS receive steering feature virtio-net: Introduce extended RSC feature tools/virtio: option to build an out of tree module

vhost: refine vhost and vringh kconfig

2020-04-01T16:06:26Z

Currently, CONFIG_VHOST depends on CONFIG_VIRTUALIZATION. But vhost is not necessarily for VM since it's a generic userspace and kernel communication protocol. Such dependency may prevent archs without virtualization support from using vhost. To solve this, a dedicated vhost menu is created under drivers so CONIFG_VHOST can be decoupled out of CONFIG_VIRTUALIZATION. While at it, also squash Kconfig.vringh into vhost Kconfig file. This avoids the trick of conditional inclusion from VOP or CAIF. Then it will be easier to introduce new vringh users and common dependency for both vringh and vhost. Signed-off-by: Jason Wang Link: https://lore.kernel.org/r/20200326140125.19794-2-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin

misc: mic: Use scnprintf() for avoiding potential buffer overflow

2020-03-18T11:24:19Z

Since snprintf() returns the would-be-output size instead of the actual output size, the succeeding calls may go beyond the given buffer limit. Fix it by replacing with scnprintf(). Signed-off-by: Takashi Iwai Link: https://lore.kernel.org/r/20200311074916.8783-1-tiwai@suse.de Signed-off-by: Greg Kroah-Hartman

misc: Use kzalloc() instead of kmalloc() with flag GFP_ZERO.

2020-02-14T17:16:03Z

Use kzalloc instead of manually setting kmalloc with flag GFP_ZERO since kzalloc sets allocated memory to zero. Signed-off-by: Huang Zijiang Signed-off-by: Yi Wang Link: https://lore.kernel.org/r/1581501247-5479-1-git-send-email-wang.yi59@zte.com.cn Signed-off-by: Greg Kroah-Hartman