linux-dev/arch/um/drivers, branch master

um: Do not initialise statics to 0.

2022-09-19T21:10:07Z

do not initialise statics to 0. Signed-off-by: Xin Gao Signed-off-by: Richard Weinberger

um: Improve panic notifiers consistency and ordering

2022-09-19T21:04:54Z

Currently the panic notifiers from user mode linux don't follow the convention for most of the other notifiers present in the kernel (indentation, priority setting, numeric return). More important, the priorities could be improved, since it's a special case (userspace), hence we could run the notifiers earlier; user mode linux shouldn't care much with other panic notifiers but the ordering among the mconsole and arch notifier is important, given that the arch one effectively triggers a core dump. Fix that by running the mconsole notifier as the first panic notifier, followed by the architecture one (that coredumps). Cc: Anton Ivanov Cc: Johannes Berg Cc: Richard Weinberger Signed-off-by: Guilherme G. Piccoli V3: - No changes. V2: - Kept the notifier header to avoid implicit usage - thanks Johannes for the suggestion! Signed-off-by: Richard Weinberger

um: remove unused reactivate_chan() declaration

2022-09-19T21:02:21Z

All uses of reactivate_chan() were removed by commit 940b241d9050 ("um: Remove obsolete reenable_XX calls"), so remove the declaration, too. Signed-off-by: Gaosheng Cui Acked-By: Anton Ivanov Signed-off-by: Richard Weinberger

um: mmaper: add __exit annotations to module exit funcs

2022-09-19T21:01:50Z

Add missing __exit annotations to module exit funcs. Signed-off-by: Xiu Jianfeng Signed-off-by: Richard Weinberger

um: virt-pci: add init/exit annotations to module init/exit funcs

2022-09-19T21:01:20Z

Add missing __init/__exit annotations to module init/exit funcs. Signed-off-by: Xiu Jianfeng Signed-off-by: Richard Weinberger

um: move from strlcpy with unused retval to strscpy

2022-09-19T20:45:24Z

Follow the advice of the below link and prefer 'strscpy' in this subsystem. Conversion is 1:1 because the return value is not used. Generated by a coccinelle script. Link: https://lore.kernel.org/r/CAHk-=wgfRnXz0W3D37d01q3JFkr_i_uTL=V6A6G1oUZcprmknw@mail.gmail.com/ Signed-off-by: Wolfram Sang Signed-off-by: Richard Weinberger

um: read multiple msg from virtio slave request fd

2022-09-19T20:28:25Z

If VHOST_USER_PROTOCOL_F_INBAND_NOTIFICATIONS is activated, the user mode linux virtio irq handler only read one msg from the corresponding socket. This creates issues, when the device emulation creates multiple call requests (e.g. for multiple virtqueues), as the socket buffer tend to fill up and the call requests are delayed. This creates a deadlock situation, when the device simulation blocks, because of sending a msg and the kernel side blocks because of synchronously waiting for an acknowledge of kick request. Actually inband notifications are meant to be used in combination with the time travel protocol, but it is not required, therefore this corner case needs to be handled. Anyways, in general it seems to be more natural to consume always all messages from a socket, instead of only a single one. Fixes: 2cd097ba8c05 ("um: virtio: Implement VHOST_USER_PROTOCOL_F_SLAVE_REQ") Signed-off-by: Benjamin Beichler Reviewed-by: Johannes Berg Signed-off-by: Richard Weinberger

virtio: Revert "virtio: find_vqs() add arg sizes"

2022-08-16T05:40:24Z

This reverts commit a10fba0377145fccefea4dc4dd5915b7ed87e546: the proposed API isn't supported on all transports but no effort was made to address this. It might not be hard to fix if we want to: maybe just rename size to size_hint and make sure legacy transports ignore the hint. But it's not sure what the benefit is in any case, so let's drop it. Fixes: a10fba037714 ("virtio: find_vqs() add arg sizes") Signed-off-by: Michael S. Tsirkin Message-Id: <20220816053602.173815-8-mst@redhat.com>

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

2022-08-12T16:50:34Z

Pull virtio updates from Michael Tsirkin: - A huge patchset supporting vq resize using the new vq reset capability - Features, fixes, and cleanups all over the place * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (88 commits) vdpa/mlx5: Fix possible uninitialized return value vdpa_sim_blk: add support for discard and write-zeroes vdpa_sim_blk: add support for VIRTIO_BLK_T_FLUSH vdpa_sim_blk: make vdpasim_blk_check_range usable by other requests vdpa_sim_blk: check if sector is 0 for commands other than read or write vdpa_sim: Implement suspend vdpa op vhost-vdpa: uAPI to suspend the device vhost-vdpa: introduce SUSPEND backend feature bit vdpa: Add suspend operation virtio-blk: Avoid use-after-free on suspend/resume virtio_vdpa: support the arg sizes of find_vqs() vhost-vdpa: Call ida_simple_remove() when failed vDPA: fix 'cast to restricted le16' warnings in vdpa.c vDPA: !FEATURES_OK should not block querying device config space vDPA/ifcvf: support userspace to query features and MQ of a management device vDPA/ifcvf: get_config_size should return a value no greater than dev implementation vhost scsi: Allow user to control num virtqueues vhost-scsi: Fix max number of virtqueues vdpa/mlx5: Support different address spaces for control and data vdpa/mlx5: Implement susupend virtqueue callback ...

virtio: find_vqs() add arg sizes

2022-08-11T08:06:40Z

find_vqs() adds a new parameter sizes to specify the size of each vq vring. NULL as sizes means that all queues in find_vqs() use the maximum size. A value in the array is 0, which means that the corresponding queue uses the maximum size. In the split scenario, the meaning of size is the largest size, because it may be limited by memory, the virtio core will try a smaller size. And the size is power of 2. Signed-off-by: Xuan Zhuo Acked-by: Hans de Goede Reviewed-by: Mathieu Poirier Acked-by: Jason Wang Message-Id: <20220801063902.129329-34-xuanzhuo@linux.alibaba.com> Signed-off-by: Michael S. Tsirkin