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2020-08-05ifcvf: implement vdpa_config_ops.get_vq_irq()Zhu Lingshan
This commit implemented vdpa_config_ops.get_vq_irq() in ifcvf, and initialized vq irq to -EINVAL. So that ifcvf can report irq number of a vq, or -EINVAL if the vq is not assigned an irq number. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Suggested-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20200731065533.4144-6-lingshan.zhu@intel.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05vhost_vdpa: implement IRQ offloading in vhost_vdpaZhu Lingshan
This patch introduce a set of functions for setup/unsetup and update irq offloading respectively by register/unregister and re-register the irq_bypass_producer. With these functions, this commit can setup/unsetup irq offloading through setting DRIVER_OK/!DRIVER_OK, and update irq offloading through SET_VRING_CALL. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Suggested-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20200731065533.4144-5-lingshan.zhu@intel.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05vDPA: add get_vq_irq() in vdpa_config_opsZhu Lingshan
This commit adds a new function get_vq_irq() in struct vdpa_config_ops, which will return the irq number of a virtqueue. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Suggested-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20200731065533.4144-4-lingshan.zhu@intel.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05kvm: detect assigned device via irqbypass managerZhu Lingshan
vDPA devices has dedicated backed hardware like passthrough-ed devices. Then it is possible to setup irq offloading to vCPU for vDPA devices. Thus this patch tries to manipulated assigned device counters by kvm_arch_start/end_assignment() in irqbypass manager, so that assigned devices could be detected in update_pi_irte() We will increase/decrease the assigned device counter in kvm/x86. Both vDPA and VFIO would go through this code path. Only X86 uses these counters and kvm_arch_start/end_assignment(), so this code path only affect x86 for now. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Suggested-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20200731065533.4144-3-lingshan.zhu@intel.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05vhost: introduce vhost_vring_callZhu Lingshan
This commit introduces struct vhost_vring_call which replaced raw struct eventfd_ctx *call_ctx in struct vhost_virtqueue. Besides eventfd_ctx, it contains a spin lock and an irq_bypass_producer in its structure. Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com> Suggested-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20200731065533.4144-2-lingshan.zhu@intel.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05vhost: Use flex_array_size() helper in copy_from_user()Gustavo A. R. Silva
Make use of the flex_array_size() helper to calculate the size of a flexible array member within an enclosing structure. This helper offers defense-in-depth against potential integer overflows, while at the same time makes it explicitly clear that we are dealing with a flexible array member. Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Link: https://lore.kernel.org/r/20200731130956.GA30525@embeddedor Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05vdpasim: protect concurrent access to iommu iotlbMax Gurtovoy
Iommu iotlb can be accessed by different cores for performing IO using multiple virt queues. Add a spinlock to synchronize iotlb accesses. This could be easily reproduced when using more than 1 pktgen threads to inject traffic to vdpa simulator. Fixes: 2c53d0f64c06f("vdpasim: vDPA device simulator") Cc: stable@vger.kernel.org Signed-off-by: Max Gurtovoy <maxg@mellanox.com> Signed-off-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20200731073822.13326-1-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05vhost: vdpa: remove per device feature whitelistJason Wang
We used to have a per device feature whitelist to filter out the unsupported virtio features. But this seems unnecessary since: - the main idea behind feature whitelist is to block control vq feature until we finalize the control virtqueue API. But the current vhost-vDPA uAPI is sufficient to support control virtqueue. For device that has hardware control virtqueue, the vDPA device driver can just setup the hardware virtqueue and let userspace to use hardware virtqueue directly. For device that doesn't have a control virtqueue, the vDPA device driver need to use e.g vringh to emulate a software control virtqueue. - we don't do it in virtio-vDPA driver So remove this limitation. Signed-off-by: Jason Wang <jasowang@redhat.com> Link: https://lore.kernel.org/r/20200720085043.16485-1-jasowang@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_ring: Avoid loop when vq is broken in virtqueue_pollMao Wenan
The loop may exist if vq->broken is true, virtqueue_get_buf_ctx_packed or virtqueue_get_buf_ctx_split will return NULL, so virtnet_poll will reschedule napi to receive packet, it will lead cpu usage(si) to 100%. call trace as below: virtnet_poll virtnet_receive virtqueue_get_buf_ctx virtqueue_get_buf_ctx_packed virtqueue_get_buf_ctx_split virtqueue_napi_complete virtqueue_poll //return true virtqueue_napi_schedule //it will reschedule napi to fix this, return false if vq is broken in virtqueue_poll. Signed-off-by: Mao Wenan <wenan.mao@linux.alibaba.com> Acked-by: Michael S. Tsirkin <mst@redhat.com> Link: https://lore.kernel.org/r/1596354249-96204-1-git-send-email-wenan.mao@linux.alibaba.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Jason Wang <jasowang@redhat.com>
2020-08-05virtio_net: use LE accessors for speed/duplexMichael S. Tsirkin
Speed and duplex config fields depend on VIRTIO_NET_F_SPEED_DUPLEX which being 63>31 depends on VIRTIO_F_VERSION_1. Accordingly, use LE accessors for these fields. Reported-by: Cornelia Huck <cohuck@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_config: drop LE option from config spaceMichael S. Tsirkin
All drivers now use virtio_cread/write_le for LE config space fields. Drop LE option from virtio_cread/write, only leaving the option to access transitional fields. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio-iommu: convert to LE accessorsMichael S. Tsirkin
Virtio iommu is modern-only. Use LE accessors for config space. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_mem: convert to LE accessorsMichael S. Tsirkin
Virtio mem is modern-only. Use LE accessors for config space. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05drm/virtio: convert to LE accessorsMichael S. Tsirkin
Virtgpu is modern-only. Use LE accessors for config space. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_pmem: convert to LE accessorsMichael S. Tsirkin
Virtio pmem is modern-only. Use LE accessors for config space. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_crypto: convert to LE accessorsMichael S. Tsirkin
Virtio crypto is modern-only. Use LE accessors for config space. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_fs: convert to LE accessorsMichael S. Tsirkin
Virtio fs is modern-only. Use LE accessors for config space. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_input: convert to LE accessorsMichael S. Tsirkin
Virtio input is modern-only. Use LE accessors for config space. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_balloon: use LE config space accessesMichael S. Tsirkin
Balloon is LE, it's cleaner to access it as such directly. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_config: add virtio_cread_le_featureMichael S. Tsirkin
Mirrors virtio_cread_feature but for LE fields. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_caif: correct tags for config space fieldsMichael S. Tsirkin
Tag config space fields as having virtio endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_config: LE config space accessorsMichael S. Tsirkin
To be used by modern code, as well as to handle LE only fields such as balloon. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_config: disallow native type fields (again)Michael S. Tsirkin
_Generic version allowed __uXX types but that is no longer necessary: Transitional devices should all use __virtioXX types (and __leXX for fields not present in the legacy devices). Modern ones should use __leXX. _uXX type would be a bug. Let's prevent that. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_config: rewrite using _GenericMichael S. Tsirkin
Min compiler version has been raised, so that's ok now. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_config: cread/write cleanupMichael S. Tsirkin
Use vars of the correct type instead of casting. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05vdpa_sim: fix endian-ness of config spaceMichael S. Tsirkin
VDPA sim accesses config space as native endian - this is wrong since it's a modern device and actually uses LE. It only supports modern guests so we could punt and just force LE, but let's use the full virtio APIs since people tend to copy/paste code, and this is not data path anyway. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_vdpa: legacy features handlingMichael S. Tsirkin
We normally expect vdpa to use the modern interface. However for consistency, let's use same APIs as vhost for legacy guests. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05vhost/vdpa: switch to new helpersMichael S. Tsirkin
For new helpers handling legacy features to be effective, vhost needs to invoke them. Tie them in. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05vdpa: make sure set_features is invoked for legacyMichael S. Tsirkin
Some legacy guests just assume features are 0 after reset. We detect that config space is accessed before features are set and set features to 0 automatically. Note: some legacy guests might not even access config space, if this is reported in the field we might need to catch a kick to handle these. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05mlxbf-tmfifo: sparse tags for config accessMichael S. Tsirkin
mlxbf-tmfifo accesses config space using native types - which works for it since the legacy virtio native types. This will break if it ever needs to support modern virtio, so with new tags previously introduced for virtio net config, sparse now warns for this in drivers. Since this is a legacy only device, fix it up using virtio_legacy_is_little_endian for now. No functional changes. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Cornelia Huck <cohuck@redhat.com> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com> Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
2020-08-05virtio_config: disallow native type fieldsMichael S. Tsirkin
Transitional devices should all use __virtioXX types (and __leXX for fields not present in legacy devices). Modern ones should use __leXX. _uXX type would be a bug. Let's prevent that. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_scsi: correct tags for config space fieldsMichael S. Tsirkin
Tag config space fields as having virtio endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_pmem: correct tags for config space fieldsMichael S. Tsirkin
Since this is a modern-only device, tag config space fields as having little endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_net: correct tags for config space fieldsMichael S. Tsirkin
Tag config space fields as having virtio endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-08-05virtio_mem: correct tags for config space fieldsMichael S. Tsirkin
Since this is a modern-only device, tag config space fields as having little endian-ness. TODO: check other uses of __virtioXX types in this header, should probably be __leXX. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_iommu: correct tags for config space fieldsMichael S. Tsirkin
Since this is a modern-only device, tag config space fields as having little endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Reviewed-by: Jean-Philippe Brucker <jean-philippe@linaro.org> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_input: correct tags for config space fieldsMichael S. Tsirkin
Since this is a modern-only device, tag config space fields as having little endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_gpu: correct tags for config space fieldsMichael S. Tsirkin
Since gpu is a modern-only device, tag config space fields as having little endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_fs: correct tags for config space fieldsMichael S. Tsirkin
Since fs is a modern-only device, tag config space fields as having little endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Acked-by: Vivek Goyal <vgoyal@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_crypto: correct tags for config space fieldsMichael S. Tsirkin
Since crypto is a modern-only device, tag config space fields as having little endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_console: correct tags for config space fieldsMichael S. Tsirkin
Tag config space fields as having virtio endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_blk: correct tags for config space fieldsMichael S. Tsirkin
Tag config space fields as having virtio endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
2020-08-05Merge branch 'for-linus' into fixesVinod Koul
Signed-off-by: Vinod Koul <vkoul@kernel.org> Conflicts: drivers/dma/idxd/sysfs.c
2020-08-05virtio_balloon: correct tags for config space fieldsMichael S. Tsirkin
Tag config space fields as having little endian-ness. Note that balloon is special: LE even when using the legacy interface. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_9p: correct tags for config space fieldsMichael S. Tsirkin
Tag config space fields as having virtio endian-ness. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio: allow __virtioXX, __leXX in config spaceMichael S. Tsirkin
Currently all config space fields are of the type __uXX. This confuses people and some drivers (notably vdpa) access them using CPU endian-ness - which only works well for legacy or LE platforms. Update virtio_cread/virtio_cwrite macros to allow __virtioXX and __leXX field types. Follow-up patches will convert config space to use these types. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_ring: sparse warning fixupMichael S. Tsirkin
virtio_store_mb was built with split ring in mind so it accepts __virtio16 arguments. Packed ring uses __le16 values, so sparse complains. It's just a store with some barriers so let's convert it to a macro, we don't loose too much type safety by doing that. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Acked-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05virtio_balloon: fix sparse warningMichael S. Tsirkin
balloon uses virtio32_to_cpu instead of cpu_to_virtio32 to convert a native endian number to virtio. No practical difference but makes sparse warn. Fix it up. Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com> Acked-by: David Hildenbrand <david@redhat.com> Reviewed-by: Cornelia Huck <cohuck@redhat.com>
2020-08-05io_uring: Fix NULL pointer dereference in loop_rw_iter()Guoyu Huang
loop_rw_iter() does not check whether the file has a read or write function. This can lead to NULL pointer dereference when the user passes in a file descriptor that does not have read or write function. The crash log looks like this: [ 99.834071] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 99.835364] #PF: supervisor instruction fetch in kernel mode [ 99.836522] #PF: error_code(0x0010) - not-present page [ 99.837771] PGD 8000000079d62067 P4D 8000000079d62067 PUD 79d8c067 PMD 0 [ 99.839649] Oops: 0010 [#2] SMP PTI [ 99.840591] CPU: 1 PID: 333 Comm: io_wqe_worker-0 Tainted: G D 5.8.0 #2 [ 99.842622] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1 04/01/2014 [ 99.845140] RIP: 0010:0x0 [ 99.845840] Code: Bad RIP value. [ 99.846672] RSP: 0018:ffffa1c7c01ebc08 EFLAGS: 00010202 [ 99.848018] RAX: 0000000000000000 RBX: ffff92363bd67300 RCX: ffff92363d461208 [ 99.849854] RDX: 0000000000000010 RSI: 00007ffdbf696bb0 RDI: ffff92363bd67300 [ 99.851743] RBP: ffffa1c7c01ebc40 R08: 0000000000000000 R09: 0000000000000000 [ 99.853394] R10: ffffffff9ec692a0 R11: 0000000000000000 R12: 0000000000000010 [ 99.855148] R13: 0000000000000000 R14: ffff92363d461208 R15: ffffa1c7c01ebc68 [ 99.856914] FS: 0000000000000000(0000) GS:ffff92363dd00000(0000) knlGS:0000000000000000 [ 99.858651] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 99.860032] CR2: ffffffffffffffd6 CR3: 000000007ac66000 CR4: 00000000000006e0 [ 99.861979] Call Trace: [ 99.862617] loop_rw_iter.part.0+0xad/0x110 [ 99.863838] io_write+0x2ae/0x380 [ 99.864644] ? kvm_sched_clock_read+0x11/0x20 [ 99.865595] ? sched_clock+0x9/0x10 [ 99.866453] ? sched_clock_cpu+0x11/0xb0 [ 99.867326] ? newidle_balance+0x1d4/0x3c0 [ 99.868283] io_issue_sqe+0xd8f/0x1340 [ 99.869216] ? __switch_to+0x7f/0x450 [ 99.870280] ? __switch_to_asm+0x42/0x70 [ 99.871254] ? __switch_to_asm+0x36/0x70 [ 99.872133] ? lock_timer_base+0x72/0xa0 [ 99.873155] ? switch_mm_irqs_off+0x1bf/0x420 [ 99.874152] io_wq_submit_work+0x64/0x180 [ 99.875192] ? kthread_use_mm+0x71/0x100 [ 99.876132] io_worker_handle_work+0x267/0x440 [ 99.877233] io_wqe_worker+0x297/0x350 [ 99.878145] kthread+0x112/0x150 [ 99.878849] ? __io_worker_unuse+0x100/0x100 [ 99.879935] ? kthread_park+0x90/0x90 [ 99.880874] ret_from_fork+0x22/0x30 [ 99.881679] Modules linked in: [ 99.882493] CR2: 0000000000000000 [ 99.883324] ---[ end trace 4453745f4673190b ]--- [ 99.884289] RIP: 0010:0x0 [ 99.884837] Code: Bad RIP value. [ 99.885492] RSP: 0018:ffffa1c7c01ebc08 EFLAGS: 00010202 [ 99.886851] RAX: 0000000000000000 RBX: ffff92363acd7f00 RCX: ffff92363d461608 [ 99.888561] RDX: 0000000000000010 RSI: 00007ffe040d9e10 RDI: ffff92363acd7f00 [ 99.890203] RBP: ffffa1c7c01ebc40 R08: 0000000000000000 R09: 0000000000000000 [ 99.891907] R10: ffffffff9ec692a0 R11: 0000000000000000 R12: 0000000000000010 [ 99.894106] R13: 0000000000000000 R14: ffff92363d461608 R15: ffffa1c7c01ebc68 [ 99.896079] FS: 0000000000000000(0000) GS:ffff92363dd00000(0000) knlGS:0000000000000000 [ 99.898017] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 99.899197] CR2: ffffffffffffffd6 CR3: 000000007ac66000 CR4: 00000000000006e0 Fixes: 32960613b7c3 ("io_uring: correctly handle non ->{read,write}_iter() file_operations") Cc: stable@vger.kernel.org Signed-off-by: Guoyu Huang <hgy5945@gmail.com> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-08-05NFS: Add tracepoints for layouterror and layoutstats.Trond Myklebust
Allow tracing of the NFSv4.2 layouterror and layoutstats operations. Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
generated by cgit (git 2.34.1) at 2025-09-15 12:00:20 +0000