- 11 Aug, 2022 33 commits
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Xuan Zhuo authored
virtio ring packed supports resize. Only after the new vring is successfully allocated based on the new num, we will release the old vring. In any case, an error is returned, indicating that the vring still points to the old vring. In the case of an error, re-initialize(by virtqueue_reinit_packed()) the virtqueue to ensure that the vring can be used. Signed-off-by:
Xuan Zhuo <xuanzhuo@linux.alibaba.com> Acked-by:
Jason Wang <jasowang@redhat.com> Message-Id: <20220801063902.129329-24-xuanzhuo@linux.alibaba.com> Signed-off-by:
Michael S. Tsirkin <mst@redhat.com>
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Xuan Zhuo authored
Introduce a function to initialize vq without allocating new ring, desc_state, desc_extra. Subsequent patches will call this function after reset vq to reinitialize vq. Signed-off-by:
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Xuan Zhuo authored
Separate the logic of attach vring, the subsequent patch will call it separately. Signed-off-by:
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Xuan Zhuo authored
Separate the logic of initializing vring, and subsequent patches will call it separately. This function completes the variable initialization of packed vring. It together with the logic of atatch constitutes the initialization of vring. Signed-off-by:
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Xuan Zhuo authored
Separate the logic for alloc desc_state and desc_extra, which will be called separately by subsequent patches. Use struct vring_packed to pass desc_state, desc_extra. Signed-off-by:
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Xuan Zhuo authored
Separate the logic of packed to create vring queue. This feature is required for subsequent virtuqueue reset vring. Signed-off-by:
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Xuan Zhuo authored
Free the structure struct vring_vritqueue_packed. Subsequent patches require it. Signed-off-by:
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Xuan Zhuo authored
virtio ring split supports resize. Only after the new vring is successfully allocated based on the new num, we will release the old vring. In any case, an error is returned, indicating that the vring still points to the old vring. In the case of an error, re-initialize(virtqueue_reinit_split()) the virtqueue to ensure that the vring can be used. Signed-off-by:
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Xuan Zhuo authored
In vring_alloc_queue_split() save vring_align, may_reduce_num to structure vring_virtqueue_split. Used to create a new vring when implementing resize. Signed-off-by:
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Xuan Zhuo authored
Introduce a function to initialize vq without allocating new ring, desc_state, desc_extra. Subsequent patches will call this function after reset vq to reinitialize vq. Signed-off-by:
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Xuan Zhuo authored
Separate the logic of attach vring, subsequent patches will call it separately. virtqueue_vring_init_split() completes the initialization of other variables of vring split. We can directly use vq->split = *vring_split to complete attach. Signed-off-by:
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Xuan Zhuo authored
Separate the logic of initializing vring, and subsequent patches will call it separately. This function completes the variable initialization of split vring. It together with the logic of atatch constitutes the initialization of vring. Signed-off-by:
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Xuan Zhuo authored
Separate the logic of creating desc_state, desc_extra, and subsequent patches will call it independently. Signed-off-by:
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Xuan Zhuo authored
Separate the logic of split to create vring queue. This feature is required for subsequent virtuqueue reset vring. Signed-off-by:
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Xuan Zhuo authored
Free the structure struct vring_vritqueue_split. Subsequent patches require it. Signed-off-by:
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Xuan Zhuo authored
__vring_new_virtqueue() instead accepts struct vring_virtqueue_split. The purpose of this is to pass more information into __vring_new_virtqueue() to make the code simpler and the structure cleaner. Signed-off-by:
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Xuan Zhuo authored
There is currently only one place to reference __vring_new_virtqueue() directly from the outside of virtio core. And here vring_new_virtqueue() can be used instead. Subsequent patches will modify __vring_new_virtqueue, so stop it as an export symbol for now. Signed-off-by:
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Xuan Zhuo authored
Separate the logic of virtqueue initialization. These variables should be reset during reset. This logic can be called independently when implementing resize/reset later. Signed-off-by:
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Xuan Zhuo authored
Separate the two inline structures(split and packed) from the structure vring_virtqueue. In this way, we can use these two structures later to pass parameters and retain temporary variables. Signed-off-by:
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Xuan Zhuo authored
Introduce vring_free() to free the vring of vq. Subsequent patches will use vring_free() alone. Signed-off-by:
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Xuan Zhuo authored
Added documentation for virtqueue_detach_unused_buf, allowing it to be called on queue reset. Signed-off-by:
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Xuan Zhuo authored
reset can be divided into the following four steps (example): 1. transport: notify the device to reset the queue 2. vring: recycle the buffer submitted 3. vring: reset/resize the vring (may re-alloc) 4. transport: mmap vring to device, and enable the queue In order to support queue reset, add two callbacks in struct virtio_config_ops to implement steps 1 and 4. Signed-off-by:
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Xuan Zhuo authored
virtio-net can display the maximum (supported by hardware) ring size in ethtool -g eth0. When the subsequent patch implements vring reset, it can judge whether the ring size passed by the driver is legal based on this. Signed-off-by:
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David Hildenbrand authored
Let's make it clearer that simply unlocking CONFIG_VIRTIO_MEM on an architecture is most probably not sufficient to have it working as expected. Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Gavin Shan <gshan@redhat.com> Signed-off-by:
David Hildenbrand <david@redhat.com> Message-Id: <20220610094737.65254-1-david@redhat.com> Signed-off-by:
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Minghao Xue authored
According to virtio_mmio wakeup flag in device trees, set its IRQ as wakeup source in virtqueue initialization. Signed-off-by:
Minghao Xue <quic_mingxue@quicinc.com> Message-Id: <1654851507-13891-3-git-send-email-quic_mingxue@quicinc.com> Signed-off-by:
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Minghao Xue authored
Some systems want to set the interrupt of virtio_mmio device as a wakeup source. On such systems, we'll use the existence of the "wakeup-source" property as a signal of requirement. Signed-off-by:
Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> Message-Id: <1654851507-13891-2-git-send-email-quic_mingxue@quicinc.com> Signed-off-by:
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Robin Murphy authored
Use the new interface to check the capability for our device specifically. Signed-off-by:
Robin Murphy <robin.murphy@arm.com> Message-Id: <548e316fa282ce513fabb991a4c4d92258062eb5.1654688822.git.robin.murphy@arm.com> Signed-off-by:
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Michael S. Tsirkin authored
This option doesn't really work and breaks too many drivers. Not yet sure what's the right thing to do, for now let's make sure randconfig isn't broken by this. Fixes: c346dae4 ("virtio: disable notification hardening by default") Cc: "Jason Wang" <jasowang@redhat.com> Signed-off-by:
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Jason Wang authored
The NVDIMM region could be available before the virtio_device_ready() that is called by virtio_dev_probe(). This means the driver tries to use device before DRIVER_OK which violates the spec, fixing this by set device ready before the nvdimm_pmem_region_create(). Note that this means the virtio_pmem_host_ack() could be triggered before the creation of the nd region, this is safe since the pmem_lock has been initialized and whether or not any available buffer is added before is validated by virtio_pmem_host_ack(). Fixes 6e84200c ("virtio-pmem: Add virtio pmem driver") Acked-by:
Pankaj Gupta <pankaj.gupta@amd.com> Signed-off-by:
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Jason Wang authored
We used to initialize the provider_data manually after nvdimm_pemm_region_create(). This seems to be racy if the flush is issued before the initialization of provider_data[1]. Fixing this by initializing the provider_data through nd_region_desc to make sure the provider_data is ready after the pmem is created. [1]: [ 80.152281] nd_pmem namespace0.0: unable to guarantee persistence of writes [ 92.393956] BUG: kernel NULL pointer dereference, address: 0000000000000318 [ 92.394551] #PF: supervisor read access in kernel mode [ 92.394955] #PF: error_code(0x0000) - not-present page [ 92.395365] PGD 0 P4D 0 [ 92.395566] Oops: 0000 [#1] PREEMPT SMP PTI [ 92.395867] CPU: 2 PID: 506 Comm: mkfs.ext4 Not tainted 5.19.0-rc1+ #453 [ 92.396365] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014 [ 92.397178] RIP: 0010:virtio_pmem_flush+0x2f/0x1f0 [ 92.397521] Code: 55 41 54 55 53 48 81 ec a0 00 00 00 65 48 8b 04 25 28 00 00 00 48 89 84 24 98 00 00 00 31 c0 48 8b 87 78 03 00 00 48 89 04 24 <48> 8b 98 18 03 00 00 e8 85 bf 6b 00 ba 58 00 00 00 be c0 0c 00 00 [ 92.398982] RSP: 0018:ffff9a7380aefc88 EFLAGS: 00010246 [ 92.399349] RAX: 0000000000000000 RBX: ffff8e77c3f86f00 RCX: 0000000000000000 [ 92.399833] RDX: ffffffffad4ea720 RSI: ffff8e77c41e39c0 RDI: ffff8e77c41c5c00 [ 92.400388] RBP: ffff8e77c41e39c0 R08: ffff8e77c19f0600 R09: 0000000000000000 [ 92.400874] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8e77c0814e28 [ 92.401364] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8e77c41e39c0 [ 92.401849] FS: 00007f3cd75b2780(0000) GS:ffff8e7937d00000(0000) knlGS:0000000000000000 [ 92.402423] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 92.402821] CR2: 0000000000000318 CR3: 0000000103c80002 CR4: 0000000000370ee0 [ 92.403307] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 92.403793] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 92.404278] Call Trace: [ 92.404481] <TASK> [ 92.404654] ? mempool_alloc+0x5d/0x160 [ 92.404939] ? terminate_walk+0x5f/0xf0 [ 92.405226] ? bio_alloc_bioset+0xbb/0x3f0 [ 92.405525] async_pmem_flush+0x17/0x80 [ 92.405806] nvdimm_flush+0x11/0x30 [ 92.406067] pmem_submit_bio+0x1e9/0x200 [ 92.406354] __submit_bio+0x80/0x120 [ 92.406621] submit_bio_noacct_nocheck+0xdc/0x2a0 [ 92.406958] submit_bio_wait+0x4e/0x80 [ 92.407234] blkdev_issue_flush+0x31/0x50 [ 92.407526] ? punt_bios_to_rescuer+0x230/0x230 [ 92.407852] blkdev_fsync+0x1e/0x30 [ 92.408112] do_fsync+0x33/0x70 [ 92.408354] __x64_sys_fsync+0xb/0x10 [ 92.408625] do_syscall_64+0x43/0x90 [ 92.408895] entry_SYSCALL_64_after_hwframe+0x46/0xb0 [ 92.409257] RIP: 0033:0x7f3cd76c6c44 Fixes 6e84200c ("virtio-pmem: Add virtio pmem driver") Acked-by:
Dan Williams <dan.j.williams@intel.com> Signed-off-by:
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Stefano Garzarella authored
iotlb_translate() can return -ENOBUFS if the bio_vec is not big enough to contain all the ranges for translation. This can happen for example if the VMM maps a large bounce buffer, without using hugepages, that requires more than 16 ranges to translate the addresses. To handle this case, let's extend iotlb_translate() to also return the number of bytes successfully translated. In copy_from_iotlb()/copy_to_iotlb() loops by calling iotlb_translate() several times until we complete the translation. Signed-off-by:
Stefano Garzarella <sgarzare@redhat.com> Message-Id: <20220624075656.13997-1-sgarzare@redhat.com> Signed-off-by:
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Xuan Zhuo authored
The parameter vq of vring_alloc_desc_extra() is useless. This patch removes this parameter. Subsequent patches will call this function to avoid passing useless arguments. Signed-off-by:
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Xuan Zhuo authored
Rename the member len in the structure rpoc_vring to num. And remove 'in bytes' from the comment of it. This is misleading. Because this actually refers to the size of the virtio vring to be created. The unit is not bytes. Signed-off-by:
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- 31 Jul, 2022 6 commits
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Linus Torvalds authored
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git://git.kernel.org/pub/scm/linux/kernel/git/clk/linuxLinus Torvalds authored
Pull clk fix from Stephen Boyd: "One-liner fix of a NULL pointer deref in the Allwinner clk driver" * tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: clk: sunxi-ng: Fix H6 RTC clock definition
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull x86 fixes from Borislav Petkov: - Update the 'mitigations=' kernel param documentation - Check the IBPB feature flag before enabling IBPB in firmware calls because cloud vendors' fantasy when it comes to creating guest configurations is unlimited - Unexport sev_es_ghcb_hv_call() before 5.19 releases now that HyperV doesn't need it anymore - Remove dead CONFIG_* items * tag 'x86_urgent_for_v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: docs/kernel-parameters: Update descriptions for "mitigations=" param with retbleed x86/bugs: Do not enable IBPB at firmware entry when IBPB is not available Revert "x86/sev: Expose sev_es_ghcb_hv_call() for use by HyperV" x86/configs: Update configs in x86_debug.config
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git://git.kernel.org/pub/scm/linux/kernel/git/tip/tipLinus Torvalds authored
Pull locking fix from Borislav Petkov: - Avoid rwsem lockups in certain situations when handling the handoff bit * tag 'locking_urgent_for_v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: locking/rwsem: Allow slowpath writer to ignore handoff bit if not set by first waiter
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git://git.kernel.org/pub/scm/linux/kernel/git/ras/rasLinus Torvalds authored
Pull EDAC fixes from Borislav Petkov: - Relax the condition under which the DIMM label in ghes_edac is set in order to accomodate an HPE BIOS which sets only the device but not the bank - Two forgotten fixes to synopsys_edac when handling error interrupts * tag 'edac_urgent_for_v5.19' of git://git.kernel.org/pub/scm/linux/kernel/git/ras/ras: EDAC/ghes: Set the DIMM label unconditionally EDAC/synopsys: Re-enable the error interrupts on v3 hw EDAC/synopsys: Use the correct register to disable the error interrupt on v3 hw
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git://git.armlinux.org.uk/~rmk/linux-armLinus Torvalds authored
Pull ARM fixes from Russell King: "Last set of ARM fixes for 5.19: - fix for MAX_DMA_ADDRESS overflow - fix for find_*_bit performing an out of bounds memory access" * tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: ARM: findbit: fix overflowing offset ARM: 9216/1: Fix MAX_DMA_ADDRESS overflow
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- 30 Jul, 2022 1 commit
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Waiman Long authored
With commit d257cc8c ("locking/rwsem: Make handoff bit handling more consistent"), the writer that sets the handoff bit can be interrupted out without clearing the bit if the wait queue isn't empty. This disables reader and writer optimistic lock spinning and stealing. Now if a non-first writer in the queue is somehow woken up or a new waiter enters the slowpath, it can't acquire the lock. This is not the case before commit d257cc8c as the writer that set the handoff bit will clear it when exiting out via the out_nolock path. This is less efficient as the busy rwsem stays in an unlock state for a longer time. In some cases, this new behavior may cause lockups as shown in [1] and [2]. This patch allows a non-first writer to ignore the handoff bit if it is not originally set or initiated by the first waiter. This patch is shown to be effective in fixing the lockup problem reported in [1]. [1] https://lore.kernel.org/lkml/20220617134325.GC30825@techsingularity.net/ [2] https://lore.kernel.org/lkml/3f02975c-1a9d-be20-32cf-f1d8e3dfafcc@oracle.com/ Fixes: d257cc8c ("locking/rwsem: Make handoff bit handling more consistent") Signed-off-by:
Waiman Long <longman@redhat.com> Signed-off-by:
Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by:
John Donnelly <john.p.donnelly@oracle.com> Tested-by:
Mel Gorman <mgorman@techsingularity.net> Link: https://lore.kernel.org/r/20220622200419.778799-1-longman@redhat.com
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