- 04 Oct, 2022 14 commits
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Jason Gunthorpe authored
Many of the mdev drivers use a simple counter for keeping track of the available instances. Move this code to the core code and store the counter in the mdev_parent. Implement it using correct locking, fixing mdpy. Drivers just provide the value in the mdev_driver at registration time and the core code takes care of maintaining it and exposing the value in sysfs. [hch: count instances per-parent instead of per-type, use an atomic_t to avoid taking mdev_list_lock in the show method] Signed-off-by:
Jason Gunthorpe <jgg@nvidia.com> Signed-off-by:
Christoph Hellwig <hch@lst.de> Reviewed-by:
Kevin Tian <kevin.tian@intel.com> Reviewed-by:
Kirti Wankhede <kwankhede@nvidia.com> Reviewed-by:
Eric Farman <farman@linux.ibm.com> Link: https://lore.kernel.org/r/20220923092652.100656-15-hch@lst.deSigned-off-by:
Alex Williamson <alex.williamson@redhat.com>
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Christoph Hellwig authored
Every driver just emits a string, simply add a method to the mdev_driver to return it and provide a standard sysfs show function. Remove the now unused types_attrs field in struct mdev_driver and the support code for it. Signed-off-by:
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Christoph Hellwig authored
Every driver just print a number, simply add a method to the mdev_driver to return it and provide a standard sysfs show function. Signed-off-by:
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Christoph Hellwig authored
Every driver just emits a static string, simply add a field to the mdev_type for the driver to fill out or fall back to the sysfs name and provide a standard sysfs show function. Signed-off-by:
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Jason Gunthorpe authored
Every driver just emits a static string, simply feed it through the ops and provide a standard sysfs show function. Signed-off-by:
Tony Krowiak <akrowiak@linux.ibm.com> Reviewed-by:
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Christoph Hellwig authored
Just open code the dereferences in the only user. Signed-off-by:
Jason J. Herne <jjherne@linux.ibm.com> Reviewed-by:
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Christoph Hellwig authored
Just open code the dereferences in the only user. Signed-off-by:
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Christoph Hellwig authored
mdev_bus_type is only used in mdev.ko now, so unexport it. Signed-off-by:
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Christoph Hellwig authored
Just open code it in the only caller. Signed-off-by:
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Christoph Hellwig authored
Instead of abusing struct attribute_group to control initialization of struct mdev_type, just define the actual attributes in the mdev_driver, allocate the mdev_type structures in the caller and pass them to mdev_register_parent. This allows the caller to use container_of to get at the containing structure and thus significantly simplify the code. Signed-off-by:
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Christoph Hellwig authored
Simplify mdev_{un}register_device by requiring the caller to pass in a structure allocate as part of the parent device structure. This removes the need for a list of parents and the separate mdev_parent refcount as we can simplify rely on the reference to the parent device. Signed-off-by: -
Christoph Hellwig authored
Include <linux/device.h> and <linux/uuid.h> so that users of this headers don't need to do that and remove those includes that aren't needed any more. Signed-off-by:
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Christoph Hellwig authored
Instead of copying the information from the vgpu_types arrays into each intel_vgpu_type structure, just reference this constant information with a pointer to the already existing data structure, and pass it into the low-level VGPU creation helpers intead of copying the data into yet anothe params data structure. Signed-off-by:
Zhenyu Wang <zhenyuw@linux.intel.com> Link: https://lore.kernel.org/r/20220923092652.100656-3-hch@lst.de [aw: Fold fix from 20220928121110.GA30738@lst.de] Signed-off-by:
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Christoph Hellwig authored
gvt->types needs to be freed on error. Fixes: bc90d097 ("drm/i915/gvt: define weight according to vGPU type") Reported-by:
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- 30 Sep, 2022 1 commit
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Jason Gunthorpe authored
When converting to directly create the vfio_device the mdev driver has to put a vfio_register_emulated_iommu_dev() in the probe() and a pairing vfio_unregister_group_dev() in the remove. This was missed for gvt, add it. Cc: stable@vger.kernel.org Fixes: 978cf586 ("drm/i915/gvt: convert to use vfio_register_emulated_iommu_dev") Reported-by:
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- 27 Sep, 2022 6 commits
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Longfang Liu authored
1. Modify some annotation information formats to keep the entire driver annotation format consistent. 2. Modify some log description formats to be consistent with the format of the entire driver log. Reviewed-by:
Longfang Liu <liulongfang@huawei.com> Link: https://lore.kernel.org/r/20220926093332.28824-6-liulongfang@huawei.comSigned-off-by:
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Longfang Liu authored
The QM_QUE_ISO_CFG macro definition is no longer used and needs to be deleted from the current driver. Reviewed-by:
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Longfang Liu authored
Remove unused function parameters for vf_qm_fun_reset() and ensure the device is enabled before the reset operation is performed. Reviewed-by:
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Longfang Liu authored
The queue address of the accelerator device should be combined into a dma address in a way of combining the low and high bits. The previous combination is wrong and needs to be modified. Reviewed-by:
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Longfang Liu authored
During the process of compatibility and matching of live migration device information, if the isolation status of the two devices is inconsistent, the live migration needs to be exited. The current driver does not return the error code correctly and needs to be fixed. Reviewed-by:
Shameer Kolothum <shameerali.kolothum.thodi@huawei.com> Reviewed-by:
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Jason Gunthorpe authored
The iommu_group comes from the struct device that a driver has been bound to and then created a struct vfio_device against. To keep the iommu layer sane we want to have a simple rule that only an attached driver should be using the iommu API. Particularly only an attached driver should hold ownership. In VFIO's case since it uses the group APIs and it shares between different drivers it is a bit more complicated, but the principle still holds. Solve this by waiting for all users of the vfio_group to stop before allowing vfio_unregister_group_dev() to complete. This is done with a new completion to know when the users go away and an additional refcount to keep track of how many device drivers are sharing the vfio group. The last driver to be unregistered will clean up the group. This solves crashes in the S390 iommu driver that come because VFIO ends up racing releasing ownership (which attaches the default iommu_domain to the device) with the removal of that same device from the iommu driver. This is a side case that iommu drivers should not have to cope with. iommu driver failed to attach the default/blocking domain WARNING: CPU: 0 PID: 5082 at drivers/iommu/iommu.c:1961 iommu_detach_group+0x6c/0x80 Modules linked in: macvtap macvlan tap vfio_pci vfio_pci_core irqbypass vfio_virqfd kvm nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables nfnetlink mlx5_ib sunrpc ib_uverbs ism smc uvdevice ib_core s390_trng eadm_sch tape_3590 tape tape_class vfio_ccw mdev vfio_iommu_type1 vfio zcrypt_cex4 sch_fq_codel configfs ghash_s390 prng chacha_s390 libchacha aes_s390 mlx5_core des_s390 libdes sha3_512_s390 nvme sha3_256_s390 sha512_s390 sha256_s390 sha1_s390 sha_common nvme_core zfcp scsi_transport_fc pkey zcrypt rng_core autofs4 CPU: 0 PID: 5082 Comm: qemu-system-s39 Tainted: G W 6.0.0-rc3 #5 Hardware name: IBM 3931 A01 782 (LPAR) Krnl PSW : 0704c00180000000 000000095bb10d28 (iommu_detach_group+0x70/0x80) R:0 T:1 IO:1 EX:1 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3 Krnl GPRS: 0000000000000001 0000000900000027 0000000000000039 000000095c97ffe0 00000000fffeffff 00000009fc290000 00000000af1fda50 00000000af590b58 00000000af1fdaf0 0000000135c7a320 0000000135e52258 0000000135e52200 00000000a29e8000 00000000af590b40 000000095bb10d24 0000038004b13c98 Krnl Code: 000000095bb10d18: c020003d56fc larl %r2,000000095c2bbb10 000000095bb10d1e: c0e50019d901 brasl %r14,000000095be4bf20 #000000095bb10d24: af000000 mc 0,0 >000000095bb10d28: b904002a lgr %r2,%r10 000000095bb10d2c: ebaff0a00004 lmg %r10,%r15,160(%r15) 000000095bb10d32: c0f4001aa867 brcl 15,000000095be65e00 000000095bb10d38: c004002168e0 brcl 0,000000095bf3def8 000000095bb10d3e: eb6ff0480024 stmg %r6,%r15,72(%r15) Call Trace: [<000000095bb10d28>] iommu_detach_group+0x70/0x80 ([<000000095bb10d24>] iommu_detach_group+0x6c/0x80) [<000003ff80243b0e>] vfio_iommu_type1_detach_group+0x136/0x6c8 [vfio_iommu_type1] [<000003ff80137780>] __vfio_group_unset_container+0x58/0x158 [vfio] [<000003ff80138a16>] vfio_group_fops_unl_ioctl+0x1b6/0x210 [vfio] pci 0004:00:00.0: Removing from iommu group 4 [<000000095b5b62e8>] __s390x_sys_ioctl+0xc0/0x100 [<000000095be5d3b4>] __do_syscall+0x1d4/0x200 [<000000095be6c072>] system_call+0x82/0xb0 Last Breaking-Event-Address: [<000000095be4bf80>] __warn_printk+0x60/0x68 It indicates that domain->ops->attach_dev() failed because the driver has already passed the point of destructing the device. Fixes: 9ac85451 ("iommu: Fix use-after-free in iommu_release_device") Reported-by:Matthew Rosato <mjrosato@linux.ibm.com> Tested-by:
Yi Liu <yi.l.liu@intel.com> Signed-off-by:
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- 22 Sep, 2022 8 commits
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Jason Gunthorpe authored
All the functions that dereference struct vfio_container are moved into container.c. Simple code motion, no functional change. Reviewed-by:
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Jason Gunthorpe authored
This is a container item. A following patch will move the vfio_container functions to their own .c file. Reviewed-by:
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Jason Gunthorpe authored
To vfio_container_ioctl_check_extension(). A following patch will turn this into a non-static function, make it clear it is related to the container. Reviewed-by:
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Jason Gunthorpe authored
This miscdev, noiommu driver and a couple of globals are all container items. Move this init into its own functions. A following patch will move the vfio_container functions to their own .c file. Reviewed-by:
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Jason Gunthorpe authored
This can all be accomplished using typical IS_ENABLED techniques, drop it all. Also rename the variable to vfio_noiommu so this can be made global in following patches. Reviewed-by:
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Jason Gunthorpe authored
This splits up the ioctl of vfio_group_ioctl_set_container() so it determines the type of file then invokes a type specific attachment function. Future patches will add iommufd to this function as an alternative type. A following patch will move the vfio_container functions to their own .c file. Reviewed-by:
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Jason Gunthorpe authored
To vfio_group_detach_container(). This function is really a container function. Fold the WARN_ON() into it as a precondition assertion. A following patch will move the vfio_container functions to their own .c file. Reviewed-by:
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Jason Gunthorpe authored
As is normal for headers. Reviewed-by:
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- 21 Sep, 2022 11 commits
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Yi Liu authored
and replace kref. With it a 'vfio-dev/vfioX' node is created under the sysfs path of the parent, indicating the device is bound to a vfio driver, e.g.: /sys/devices/pci0000\:6f/0000\:6f\:01.0/vfio-dev/vfio0 It is also a preparatory step toward adding cdev for supporting future device-oriented uAPI. Add Documentation/ABI/testing/sysfs-devices-vfio-dev. Suggested-by:
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Kevin Tian authored
With the addition of vfio_put_device() now the names become confusing. vfio_put_device() is clear from object life cycle p.o.v given kref. vfio_device_put()/vfio_device_try_get() are helpers for tracking users on a registered device. Now rename them: - vfio_device_put() -> vfio_device_put_registration() - vfio_device_try_get() -> vfio_device_try_get_registration() Signed-off-by:
Eric Auger <eric.auger@redhat.com> Link: https://lore.kernel.org/r/20220921104401.38898-15-kevin.tian@intel.comSigned-off-by:
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Kevin Tian authored
ccw is the only exception which cannot use vfio_alloc_device() because its private device structure is designed to serve both mdev and parent. Life cycle of the parent is managed by css_driver so vfio_ccw_private must be allocated/freed in css_driver probe/remove path instead of conforming to vfio core life cycle for mdev. Given that use a wait/completion scheme so the mdev remove path waits after vfio_put_device() until receiving a completion notification from @release. The completion indicates that all active references on vfio_device have been released. After that point although free of vfio_ccw_private is delayed to css_driver it's at least guaranteed to have no parallel reference on released vfio device part from other code paths. memset() in @probe is removed. vfio_device is either already cleared when probed for the first time or cleared in @release from last probe. The right fix is to introduce separate structures for mdev and parent, but this won't happen in short term per prior discussions. Remove vfio_init/uninit_group_dev() as no user now. Suggested-by:
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Kevin Tian authored
Implement amba's own vfio_device_ops. Remove vfio_platform_probe/remove_common() given no user now. Signed-off-by:
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Kevin Tian authored
Move vfio_device_ops from platform core to platform drivers so device specific init/cleanup can be added. Introduce two new helpers vfio_platform_init/release_common() for the use in driver @init/@release. vfio_platform_probe/remove_common() will be deprecated. Signed-off-by:
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Yi Liu authored
Also add a comment to mark that vfio core releases device_set if @init fails. Signed-off-by:
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Yi Liu authored
and manage available_instances inside @init/@release. Signed-off-by:
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Kevin Tian authored
Move vfio_device to the start of intel_vgpu as required by the new helpers. Change intel_gvt_create_vgpu() to use intel_vgpu as the first param as other vgpu helpers do. Signed-off-by:
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Yi Liu authored
and manage avail_mbytes inside @init/@release. Signed-off-by:
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Yi Liu authored
and manage available ports inside @init/@release. Signed-off-by:
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Yi Liu authored
and manage mdpy_count inside @init/@release. Signed-off-by:
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