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2020-12-19virtio-mem: factor out adding/removing memory from LinuxDavid Hildenbrand1-34/+73
Let's use wrappers for the low-level functions that dev_dbg/dev_warn and work on addr + size, such that we can reuse them for adding/removing in other granularity. We only warn when adding memory failed, because that's something to pay attention to. We won't warn when removing failed, we'll reuse that in racy context soon (and we do have proper BUG_ON() statements in the current cases where it must never happen). Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-25-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: memory notifier callbacks are specific to Sub Block Mode (SBM)David Hildenbrand1-14/+15
Let's rename accordingly. Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-24-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virito-mem: existing (un)plug functions are specific to Sub Block Mode (SBM)David Hildenbrand1-47/+43
Let's rename them accordingly. virtio_mem_plug_request() and virtio_mem_unplug_request() will be handled separately. Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-23-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: memory block ids are specific to Sub Block Mode (SBM)David Hildenbrand1-23/+23
Let's move first_mb_id/next_mb_id/last_usable_mb_id accordingly. Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-22-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: nb_sb_per_mb and subblock_size are specific to Sub Block Mode (SBM)David Hildenbrand1-48/+48
Let's rename to "sbs_per_mb" and "sb_size" and move accordingly. Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-21-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virito-mem: subblock states are specific to Sub Block Mode (SBM)David Hildenbrand1-63/+69
Let's rename and move accordingly. While at it, rename sb_bitmap to "sb_states". Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-20-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: memory block states are specific to Sub Block Mode (SBM)David Hildenbrand1-106/+109
let's use a new "sbm" sub-struct to hold SBM-specific state and rename + move applicable definitions, functions, and variables (related to memory block states). While at it: - Drop the "_STATE" part from memory block states - Rename "nb_mb_state" to "mb_count" - "set_mb_state" / "get_mb_state" vs. "mb_set_state" / "mb_get_state" - Don't use lengthy "enum virtio_mem_smb_mb_state", simply use "uint8_t" Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-19-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virito-mem: document Sub Block Mode (SBM)David Hildenbrand1-0/+15
Let's add some documentation for the current mode - Sub Block Mode (SBM) - to prepare for a new mode - Big Block Mode (BBM). Follow-up patches will properly factor out the existing Sub Block Mode (SBM) and implement Big Block Mode (BBM). Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-18-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: generalize handling when memory is getting onlined deferredDavid Hildenbrand1-32/+63
We don't want to add too much memory when it's not getting onlined immediately, to avoid running OOM. Generalize the handling, to avoid making use of memory block states. Use a threshold of 1 GiB for now. Properly adjust the offline size when adding/removing memory. As we are not always protected by a lock when touching the offline size, use an atomic64_t. We don't care about races (e.g., someone offlining memory while we are adding more), only about consistent values. (1 GiB needs a memmap of ~16MiB - which sounds reasonable even for setups with little boot memory and (possibly) one virtio-mem device per node) We don't want to retrigger when onlining is caused immediately by our action (e.g., adding memory which immediately gets onlined), so use a flag to indicate if the workqueue is active and use that as an indicator whether to trigger a retry. This will also be especially relevant for Big Block Mode (BBM), whereby we might re-online memory in case offlining of another memory block failed. Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-17-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: don't always trigger the workqueue when offlining memoryDavid Hildenbrand1-12/+28
Let's trigger from offlining code only when we're not allowed to unplug online memory. Handle the other case (memmap possibly freeing up another memory block) when actually removing memory. We now also properly handle the case when removing already offline memory blocks via virtio_mem_mb_remove(). When removing via virtio_mem_remove(), when unloading the driver, virtio_mem_retry() is a NOP and safe to use. While at it, move retry handling when offlining out of virtio_mem_notify_offline(), to share it with Big Block Mode (BBM) soon. This is a preparation for Big Block Mode (BBM), whereby we can see some temporary offlining of memory blocks without actually making progress. Imagine you have a Big Block that spans to Linux memory blocks. Assume the first Linux memory blocks has no unmovable data on it. When we would call offline_and_remove_memory() on the big block, we would 1. Try to offline the first block. Works, notifiers triggered. virtio_mem_retry() called. 2. Try to offline the second block. Does not work. 3. Re-online first block. 4. Exit to main loop, exit workqueue. 5. Retry immediately (due to virtio_mem_retry()), go to 1. The result are endless retries. Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-16-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: drop last_mb_idDavid Hildenbrand1-4/+0
No longer used, let's drop it. Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-15-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: generalize virtio_mem_overlaps_range()David Hildenbrand1-7/+3
Avoid using memory block ids. While at it, use uint64_t for address/size. This is a preparation for Big Block Mode (BBM). Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-14-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: generalize virtio_mem_owned_mb()David Hildenbrand1-4/+5
Avoid using memory block ids. Rename it to virtio_mem_contains_range(). This is a preparation for Big Block Mode (BBM). Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-13-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: generalize check for added memoryDavid Hildenbrand1-4/+15
Let's check by traversing busy system RAM resources instead, to avoid relying on memory block states. Don't use walk_system_ram_range(), as that works on pages and we want to use the bare addresses we have easily at hand. This is a preparation for Big Block Mode (BBM), which won't have memory block states. Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-12-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: retry fake-offlining via alloc_contig_range() on ZONE_MOVABLEDavid Hildenbrand1-11/+26
ZONE_MOVABLE is supposed to give some guarantees, yet, alloc_contig_range() isn't prepared to properly deal with some racy cases properly (e.g., temporary page pinning when exiting processed, PCP). Retry 5 times for now. There is certainly room for improvement in the future. Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-11-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: factor out handling of fake-offline pages in memory notifierDavid Hildenbrand1-23/+50
Let's factor out the core pieces and place the implementation next to virtio_mem_fake_offline(). We'll reuse this functionality soon. Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-10-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: factor out fake-offlining into virtio_mem_fake_offline()David Hildenbrand1-10/+24
... which now matches virtio_mem_fake_online(). We'll reuse this functionality soon. Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-9-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: print debug messages from virtio_mem_send_*_request()David Hildenbrand1-15/+35
Let's move the existing dev_dbg() into the functions, print if something went wrong, and also print for virtio_mem_send_unplug_all_request(). Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-8-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: factor out calculation of the bit number within the subblock bitmapDavid Hildenbrand1-5/+15
The calculation is already complicated enough, let's limit it to one location. Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-7-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: use "unsigned long" for nr_pages when fake onlining/offliningDavid Hildenbrand1-4/+4
No harm done, but let's be consistent. Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-6-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: drop rc2 in virtio_mem_mb_plug_and_add()David Hildenbrand1-3/+2
We can drop rc2, we don't actually need the value. Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-5-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: simplify MAX_ORDER - 1 / pageblock_order handlingDavid Hildenbrand1-16/+19
Let's use pageblock_nr_pages and MAX_ORDER_NR_PAGES instead where possible to simplify. Add a comment why we have that restriction for now. Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-4-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: more precise calculation in virtio_mem_mb_state_prepare_next_mb()David Hildenbrand1-4/+2
We actually need one byte less (next_mb_id is exclusive, first_mb_id is inclusive). While at it, compact the code. Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-3-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-19virtio-mem: determine nid only once using memory_add_physaddr_to_nid()David Hildenbrand1-17/+11
Let's determine the target nid only once in case we have none specified - usually, we'll end up with node 0 either way. Reviewed-by: Wei Yang <richard.weiyang@linux.alibaba.com> Reviewed-by: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Cc: "Michael S. Tsirkin" <mst@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com> Signed-off-by: David Hildenbrand <david@redhat.com> Link: https://lore.kernel.org/r/20201112133815.13332-2-david@redhat.com Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
2020-12-14Linux 5.10v5.10Linus Torvalds1-1/+1
2020-12-13Merge tag 'x86-urgent-2020-12-13' of ↵Linus Torvalds8-42/+111
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Thomas Gleixner: "A set of x86 and membarrier fixes: - Correct a few problems in the x86 and the generic membarrier implementation. Small corrections for assumptions about visibility which have turned out not to be true. - Make the PAT bits for memory encryption correct vs 4K and 2M/1G page table entries as they are at a different location. - Fix a concurrency issue in the the local bandwidth readout of resource control leading to incorrect values - Fix the ordering of allocating a vector for an interrupt. The order missed to respect the provided cpumask when the first attempt of allocating node local in the mask fails. It then tries the node instead of trying the full provided mask first. This leads to erroneous error messages and breaking the (user) supplied affinity request. Reorder it. - Make the INT3 padding detection in optprobe work correctly" * tag 'x86-urgent-2020-12-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/kprobes: Fix optprobe to detect INT3 padding correctly x86/apic/vector: Fix ordering in vector assignment x86/resctrl: Fix incorrect local bandwidth when mba_sc is enabled x86/mm/mem_encrypt: Fix definition of PMD_FLAGS_DEC_WP membarrier: Execute SYNC_CORE on the calling thread membarrier: Explicitly sync remote cores when SYNC_CORE is requested membarrier: Add an actual barrier before rseq_preempt() x86/membarrier: Get rid of a dubious optimization
2020-12-13Merge tag 'block-5.10-2020-12-12' of git://git.kernel.dk/linux-blockLinus Torvalds6-393/+82
Pull block fixes from Jens Axboe: "This should be it for 5.10. Mike and Song looked into the warning case, and thankfully it appears the fix was pretty trivial - we can just change the md device chunk type to unsigned int to get rid of it. They cannot currently be < 0, and nobody is checking for that either. We're reverting the discard changes as the corruption reports came in very late, and there's just no time to attempt to deal with it at this point. Reverting the changes in question is the right call for 5.10" * tag 'block-5.10-2020-12-12' of git://git.kernel.dk/linux-block: md: change mddev 'chunk_sectors' from int to unsigned Revert "md: add md_submit_discard_bio() for submitting discard bio" Revert "md/raid10: extend r10bio devs to raid disks" Revert "md/raid10: pull codes that wait for blocked dev into one function" Revert "md/raid10: improve raid10 discard request" Revert "md/raid10: improve discard request for far layout" Revert "dm raid: remove unnecessary discard limits for raid10"
2020-12-12Merge tag 'scsi-fixes' of ↵Linus Torvalds6-9/+15
git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi Pull SCSI fixes from James Bottomley: "Five small fixes. Four in drivers: - hisi_sas: fix internal queue timeout - be2iscsi: revert a prior fix causing problems - bnx2i: add missing dependency - storvsc: late arriving revert of a problem fix and one in the core. The core one is a minor change to stop paying attention to the busy count when returning out of resources because there's a race window where the queue might not restart due to missing returning I/O" * tag 'scsi-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi: Revert "scsi: storvsc: Validate length of incoming packet in storvsc_on_channel_callback()" scsi: hisi_sas: Select a suitable queue for internal I/Os scsi: core: Fix race between handling STS_RESOURCE and completion scsi: be2iscsi: Revert "Fix a theoretical leak in beiscsi_create_eqs()" scsi: bnx2i: Requires MMU
2020-12-12Merge branch 'i2c/for-current' of ↵Linus Torvalds1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux Pull i2c fix from Wolfram Sang: "Bugfix for the AT24 EEPROM driver" * 'i2c/for-current' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: misc: eeprom: at24: fix NVMEM name with custom AT24 device name
2020-12-12Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds11-22/+74
Pull kvm fixes from Paolo Bonzini: "Bugfixes for ARM, x86 and tools" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: tools/kvm_stat: Exempt time-based counters KVM: mmu: Fix SPTE encoding of MMIO generation upper half kvm: x86/mmu: Use cpuid to determine max gfn kvm: svm: de-allocate svm_cpu_data for all cpus in svm_cpu_uninit() selftests: kvm/set_memory_region_test: Fix race in move region test KVM: arm64: Add usage of stage 2 fault lookup level in user_mem_abort() KVM: arm64: Fix handling of merging tables into a block entry KVM: arm64: Fix memory leak on stage2 update of a valid PTE
2020-12-12Merge tag 'for-linus-5.10c-rc8-tag' of ↵Linus Torvalds7-137/+182
git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip Pull xen fixes from Juergen Gross: "A short series fixing a regression introduced in 5.9 for running as Xen dom0 on a system with NVMe backed storage" * tag 'for-linus-5.10c-rc8-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: xen: don't use page->lru for ZONE_DEVICE memory xen: add helpers for caching grant mapping pages
2020-12-12Merge tag 'riscv-for-linus-5.10-rc8' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux Pull RISC-V fix from Palmer Dabbelt: "Just one fix. It's nothing critical, just a randconfig that wasn't building. That said, it does seem pretty safe and is technically a regression so I'm sending it along for 5.10: - define get_cycles64() all the time, as it's used by most configurations" * tag 'riscv-for-linus-5.10-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: RISC-V: Define get_cycles64() regardless of M-mode
2020-12-12Merge tag 'io_uring-5.10-2020-12-11' of git://git.kernel.dk/linux-blockLinus Torvalds1-8/+11
Pull io_uring fixes from Jens Axboe: "Two fixes in here, fixing issues introduced in this merge window" * tag 'io_uring-5.10-2020-12-11' of git://git.kernel.dk/linux-block: io_uring: fix file leak on error path of io ctx creation io_uring: fix mis-seting personality's creds
2020-12-12Merge branch 'for-linus' of ↵Linus Torvalds6-40/+159
git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input Pull input fixes from Dmitry Torokhov: - a fix for cm109 stomping on its own control URB if it tries to toggle buzzer immediately after userspace opens input device (found by syzcaller) - another fix for Raydium touchscreens that do not like splitting command transfers - quirks for i8042, soc_button_array, and goodix drivers to make them work better with certain hardware. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: Input: goodix - add upside-down quirk for Teclast X98 Pro tablet Input: cm109 - do not stomp on control URB Input: i8042 - add Acer laptops to the i8042 reset list Input: cros_ec_keyb - send 'scancodes' in addition to key events Input: soc_button_array - add Lenovo Yoga Tablet2 1051L to the dmi_use_low_level_irq list Input: raydium_ts_i2c - do not split tx transactions
2020-12-12md: change mddev 'chunk_sectors' from int to unsignedMike Snitzer1-2/+2
Commit e2782f560c29 ("Revert "dm raid: remove unnecessary discard limits for raid10"") exposed compiler warnings introduced by commit e0910c8e4f87 ("dm raid: fix discard limits for raid1 and raid10"): In file included from ./include/linux/kernel.h:14, from ./include/asm-generic/bug.h:20, from ./arch/x86/include/asm/bug.h:93, from ./include/linux/bug.h:5, from ./include/linux/mmdebug.h:5, from ./include/linux/gfp.h:5, from ./include/linux/slab.h:15, from drivers/md/dm-raid.c:8: drivers/md/dm-raid.c: In function ‘raid_io_hints’: ./include/linux/minmax.h:18:28: warning: comparison of distinct pointer types lacks a cast (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1))) ^~ ./include/linux/minmax.h:32:4: note: in expansion of macro ‘__typecheck’ (__typecheck(x, y) && __no_side_effects(x, y)) ^~~~~~~~~~~ ./include/linux/minmax.h:42:24: note: in expansion of macro ‘__safe_cmp’ __builtin_choose_expr(__safe_cmp(x, y), \ ^~~~~~~~~~ ./include/linux/minmax.h:51:19: note: in expansion of macro ‘__careful_cmp’ #define min(x, y) __careful_cmp(x, y, <) ^~~~~~~~~~~~~ ./include/linux/minmax.h:84:39: note: in expansion of macro ‘min’ __x == 0 ? __y : ((__y == 0) ? __x : min(__x, __y)); }) ^~~ drivers/md/dm-raid.c:3739:33: note: in expansion of macro ‘min_not_zero’ limits->max_discard_sectors = min_not_zero(rs->md.chunk_sectors, ^~~~~~~~~~~~ Fix this by changing the chunk_sectors member of 'struct mddev' from int to 'unsigned int' to match the type used for the 'chunk_sectors' member of 'struct queue_limits'. Various MD code still uses 'int' but none of it appears to ever make use of signed int; and storing positive signed int in unsigned is perfectly safe. Reported-by: Song Liu <songliubraving@fb.com> Fixes: e2782f560c29 ("Revert "dm raid: remove unnecessary discard limits for raid10"") Fixes: e0910c8e4f87 ("dm raid: fix discard limits for raid1 and raid10") Cc: stable@vger,kernel.org # e0910c8e4f87 was marked for stable@ Signed-off-by: Mike Snitzer <snitzer@redhat.com> Reviewed-by: Song Liu <song@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-12-12x86/kprobes: Fix optprobe to detect INT3 padding correctlyMasami Hiramatsu1-2/+20
Commit 7705dc855797 ("x86/vmlinux: Use INT3 instead of NOP for linker fill bytes") changed the padding bytes between functions from NOP to INT3. However, when optprobe decodes a target function it finds INT3 and gives up the jump optimization. Instead of giving up any INT3 detection, check whether the rest of the bytes to the end of the function are INT3. If all of them are INT3, those come from the linker. In that case, continue the optprobe jump optimization. [ bp: Massage commit message. ] Fixes: 7705dc855797 ("x86/vmlinux: Use INT3 instead of NOP for linker fill bytes") Reported-by: Adam Zabrocki <pi3@pi3.com.pl> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Steven Rostedt (VMware) <rostedt@goodmis.org> Reviewed-by: Kees Cook <keescook@chromium.org> Cc: stable@vger.kernel.org Link: https://lkml.kernel.org/r/160767025681.3880685.16021570341428835411.stgit@devnote2
2020-12-12Input: goodix - add upside-down quirk for Teclast X98 Pro tabletSimon Beginn1-0/+12
The touchscreen on the Teclast x98 Pro is also mounted upside-down in relation to the display orientation. Signed-off-by: Simon Beginn <linux@simonmicro.de> Signed-off-by: Bastien Nocera <hadess@hadess.net> Link: https://lore.kernel.org/r/20201117004253.27A5A27EFD@localhost Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
2020-12-12tools/kvm_stat: Exempt time-based countersStefan Raspl1-1/+5
The new counters halt_poll_success_ns and halt_poll_fail_ns do not count events. Instead they provide a time, and mess up our statistics. Therefore, we should exclude them. Removal is currently implemented with an exempt list. If more counters like these appear, we can think about a more general rule like excluding all fields name "*_ns", in case that's a standing convention. Signed-off-by: Stefan Raspl <raspl@linux.ibm.com> Tested-and-reported-by: Christian Borntraeger <borntraeger@de.ibm.com> Message-Id: <20201208210829.101324-1-raspl@linux.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-12-12KVM: mmu: Fix SPTE encoding of MMIO generation upper halfMaciej S. Szmigiero3-10/+21
Commit cae7ed3c2cb0 ("KVM: x86: Refactor the MMIO SPTE generation handling") cleaned up the computation of MMIO generation SPTE masks, however it introduced a bug how the upper part was encoded: SPTE bits 52-61 were supposed to contain bits 10-19 of the current generation number, however a missing shift encoded bits 1-10 there instead (mostly duplicating the lower part of the encoded generation number that then consisted of bits 1-9). In the meantime, the upper part was shrunk by one bit and moved by subsequent commits to become an upper half of the encoded generation number (bits 9-17 of bits 0-17 encoded in a SPTE). In addition to the above, commit 56871d444bc4 ("KVM: x86: fix overlap between SPTE_MMIO_MASK and generation") has changed the SPTE bit range assigned to encode the generation number and the total number of bits encoded but did not update them in the comment attached to their defines, nor in the KVM MMU doc. Let's do it here, too, since it is too trivial thing to warrant a separate commit. Fixes: cae7ed3c2cb0 ("KVM: x86: Refactor the MMIO SPTE generation handling") Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com> Message-Id: <156700708db2a5296c5ed7a8b9ac71f1e9765c85.1607129096.git.maciej.szmigiero@oracle.com> Cc: stable@vger.kernel.org [Reorganize macros so that everything is computed from the bit ranges. - Paolo] Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-12-12Merge tag 'mtd/fixes-for-5.10-rc8' of ↵Linus Torvalds9-9/+27
git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux Pull mtd fixes from Miquel Raynal: "Second series of fixes for raw NAND drivers initiated because of a rework of the ECC engine subsystem. The location of the DT parsing logic got moved, breaking several drivers which in fact were not doing the ECC engine initialization at the right place. These drivers have been fixed by enforcing a particular ECC engine type and algorithm, software Hamming, while the algorithm may be overwritten by a DT property. This merge request fixes this in the xway, socrates, plat_nand, pasemi, orion, mpc5121, gpio, au1550 and ams-delta controller drivers" * tag 'mtd/fixes-for-5.10-rc8' of git://git.kernel.org/pub/scm/linux/kernel/git/mtd/linux: mtd: rawnand: xway: Do not force a particular software ECC engine mtd: rawnand: socrates: Do not force a particular software ECC engine mtd: rawnand: plat_nand: Do not force a particular software ECC engine mtd: rawnand: pasemi: Do not force a particular software ECC engine mtd: rawnand: orion: Do not force a particular software ECC engine mtd: rawnand: mpc5121: Do not force a particular software ECC engine mtd: rawnand: gpio: Do not force a particular software ECC engine mtd: rawnand: au1550: Do not force a particular software ECC engine mtd: rawnand: ams-delta: Do not force a particular software ECC engine
2020-12-12Merge tag 'mmc-v5.10-rc4-2' of ↵Linus Torvalds4-15/+35
git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc Pull MMC fixes from Ulf Hansson: "A couple of MMC fixes: MMC core: - Fixup condition for CMD13 polling for RPMB requests MMC host: - mtk-sd: Fix system suspend/resume support for CQHCI - mtd-sd: Extend SDIO IRQ fix to more variants - sdhci-of-arasan: Fix clock registration error for Keem Bay SOC - tmio: Bring HW to a sane state after a power off" * tag 'mmc-v5.10-rc4-2' of git://git.kernel.org/pub/scm/linux/kernel/git/ulfh/mmc: mmc: mediatek: mark PM functions as __maybe_unused mmc: block: Fixup condition for CMD13 polling for RPMB requests mmc: tmio: improve bringing HW to a sane state with MMC_POWER_OFF mmc: sdhci-of-arasan: Fix clock registration error for Keem Bay SOC mmc: mediatek: Extend recheck_sdio_irq fix to more variants mmc: mediatek: Fix system suspend/resume support for CQHCI
2020-12-12Merge tag 'at24-fixes-for-v5.10' of ↵Wolfram Sang1-1/+0
git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux into i2c/for-current at24 fixes for v5.10 - fix NVMEM name with custom AT24 device name
2020-12-12Merge tag 'zonefs-5.10-rc7' of ↵Linus Torvalds1-6/+8
git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs Pull zonefs fix from Damien Le Moal: "A single patch in this pull request to fix a BIO and page reference leak when writing sequential zone files" * tag 'zonefs-5.10-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/zonefs: zonefs: fix page reference and BIO leak
2020-12-12bpf: Fix enum names for bpf_this_cpu_ptr() and bpf_per_cpu_ptr() helpersAndrii Nakryiko4-8/+8
Remove bpf_ prefix, which causes these helpers to be reported in verifier dump as bpf_bpf_this_cpu_ptr() and bpf_bpf_per_cpu_ptr(), respectively. Lets fix it as long as it is still possible before UAPI freezes on these helpers. Fixes: eaa6bcb71ef6 ("bpf: Introduce bpf_per_cpu_ptr()") Signed-off-by: Andrii Nakryiko <andrii@kernel.org> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-12Merge branch 'akpm' (patches from Andrew)Linus Torvalds10-32/+77
Merge misc fixes from Andrew Morton: "8 patches. Subsystems affected by this patch series: proc, selftests, kbuild, and mm (pagecache, kasan, hugetlb)" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: mm/hugetlb: clear compound_nr before freeing gigantic pages kasan: fix object remaining in offline per-cpu quarantine elfcore: fix building with clang initramfs: fix clang build failure kbuild: avoid static_assert for genksyms selftest/fpu: avoid clang warning proc: use untagged_addr() for pagemap_read addresses revert "mm/filemap: add static for function __add_to_page_cache_locked"
2020-12-12mm/hugetlb: clear compound_nr before freeing gigantic pagesGerald Schaefer1-0/+1
Commit 1378a5ee451a ("mm: store compound_nr as well as compound_order") added compound_nr counter to first tail struct page, overlaying with page->mapping. The overlay itself is fine, but while freeing gigantic hugepages via free_contig_range(), a "bad page" check will trigger for non-NULL page->mapping on the first tail page: BUG: Bad page state in process bash pfn:380001 page:00000000c35f0856 refcount:0 mapcount:0 mapping:00000000126b68aa index:0x0 pfn:0x380001 aops:0x0 flags: 0x3ffff00000000000() raw: 3ffff00000000000 0000000000000100 0000000000000122 0000000100000000 raw: 0000000000000000 0000000000000000 ffffffff00000000 0000000000000000 page dumped because: non-NULL mapping Modules linked in: CPU: 6 PID: 616 Comm: bash Not tainted 5.10.0-rc7-next-20201208 #1 Hardware name: IBM 3906 M03 703 (LPAR) Call Trace: show_stack+0x6e/0xe8 dump_stack+0x90/0xc8 bad_page+0xd6/0x130 free_pcppages_bulk+0x26a/0x800 free_unref_page+0x6e/0x90 free_contig_range+0x94/0xe8 update_and_free_page+0x1c4/0x2c8 free_pool_huge_page+0x11e/0x138 set_max_huge_pages+0x228/0x300 nr_hugepages_store_common+0xb8/0x130 kernfs_fop_write+0xd2/0x218 vfs_write+0xb0/0x2b8 ksys_write+0xac/0xe0 system_call+0xe6/0x288 Disabling lock debugging due to kernel taint This is because only the compound_order is cleared in destroy_compound_gigantic_page(), and compound_nr is set to 1U << order == 1 for order 0 in set_compound_order(page, 0). Fix this by explicitly clearing compound_nr for first tail page after calling set_compound_order(page, 0). Link: https://lkml.kernel.org/r/20201208182813.66391-2-gerald.schaefer@linux.ibm.com Fixes: 1378a5ee451a ("mm: store compound_nr as well as compound_order") Signed-off-by: Gerald Schaefer <gerald.schaefer@linux.ibm.com> Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Heiko Carstens <hca@linux.ibm.com> Cc: Mike Kravetz <mike.kravetz@oracle.com> Cc: Christian Borntraeger <borntraeger@de.ibm.com> Cc: <stable@vger.kernel.org> [5.9+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-12kasan: fix object remaining in offline per-cpu quarantineKuan-Ying Lee1-0/+39
We hit this issue in our internal test. When enabling generic kasan, a kfree()'d object is put into per-cpu quarantine first. If the cpu goes offline, object still remains in the per-cpu quarantine. If we call kmem_cache_destroy() now, slub will report "Objects remaining" error. ============================================================================= BUG test_module_slab (Not tainted): Objects remaining in test_module_slab on __kmem_cache_shutdown() ----------------------------------------------------------------------------- Disabling lock debugging due to kernel taint INFO: Slab 0x(____ptrval____) objects=34 used=1 fp=0x(____ptrval____) flags=0x2ffff00000010200 CPU: 3 PID: 176 Comm: cat Tainted: G B 5.10.0-rc1-00007-g4525c8781ec0-dirty #10 Hardware name: linux,dummy-virt (DT) Call trace: dump_backtrace+0x0/0x2b0 show_stack+0x18/0x68 dump_stack+0xfc/0x168 slab_err+0xac/0xd4 __kmem_cache_shutdown+0x1e4/0x3c8 kmem_cache_destroy+0x68/0x130 test_version_show+0x84/0xf0 module_attr_show+0x40/0x60 sysfs_kf_seq_show+0x128/0x1c0 kernfs_seq_show+0xa0/0xb8 seq_read+0x1f0/0x7e8 kernfs_fop_read+0x70/0x338 vfs_read+0xe4/0x250 ksys_read+0xc8/0x180 __arm64_sys_read+0x44/0x58 el0_svc_common.constprop.0+0xac/0x228 do_el0_svc+0x38/0xa0 el0_sync_handler+0x170/0x178 el0_sync+0x174/0x180 INFO: Object 0x(____ptrval____) @offset=15848 INFO: Allocated in test_version_show+0x98/0xf0 age=8188 cpu=6 pid=172 stack_trace_save+0x9c/0xd0 set_track+0x64/0xf0 alloc_debug_processing+0x104/0x1a0 ___slab_alloc+0x628/0x648 __slab_alloc.isra.0+0x2c/0x58 kmem_cache_alloc+0x560/0x588 test_version_show+0x98/0xf0 module_attr_show+0x40/0x60 sysfs_kf_seq_show+0x128/0x1c0 kernfs_seq_show+0xa0/0xb8 seq_read+0x1f0/0x7e8 kernfs_fop_read+0x70/0x338 vfs_read+0xe4/0x250 ksys_read+0xc8/0x180 __arm64_sys_read+0x44/0x58 el0_svc_common.constprop.0+0xac/0x228 kmem_cache_destroy test_module_slab: Slab cache still has objects Register a cpu hotplug function to remove all objects in the offline per-cpu quarantine when cpu is going offline. Set a per-cpu variable to indicate this cpu is offline. [qiang.zhang@windriver.com: fix slab double free when cpu-hotplug] Link: https://lkml.kernel.org/r/20201204102206.20237-1-qiang.zhang@windriver.com Link: https://lkml.kernel.org/r/1606895585-17382-2-git-send-email-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Signed-off-by: Zqiang <qiang.zhang@windriver.com> Suggested-by: Dmitry Vyukov <dvyukov@google.com> Reported-by: Guangye Yang <guangye.yang@mediatek.com> Reviewed-by: Dmitry Vyukov <dvyukov@google.com> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Alexander Potapenko <glider@google.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Nicholas Tang <nicholas.tang@mediatek.com> Cc: Miles Chen <miles.chen@mediatek.com> Cc: Qian Cai <qcai@redhat.com> Cc: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-12elfcore: fix building with clangArnd Bergmann3-27/+22
kernel/elfcore.c only contains weak symbols, which triggers a bug with clang in combination with recordmcount: Cannot find symbol for section 2: .text. kernel/elfcore.o: failed Move the empty stubs into linux/elfcore.h as inline functions. As only two architectures use these, just use the architecture specific Kconfig symbols to key off the declaration. Link: https://lkml.kernel.org/r/20201204165742.3815221-2-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Barret Rhoden <brho@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-12initramfs: fix clang build failureArnd Bergmann1-1/+1
There is only one function in init/initramfs.c that is in the .text section, and it is marked __weak. When building with clang-12 and the integrated assembler, this leads to a bug with recordmcount: ./scripts/recordmcount "init/initramfs.o" Cannot find symbol for section 2: .text. init/initramfs.o: failed I'm not quite sure what exactly goes wrong, but I notice that this function is only ever called from an __init function, and normally inlined. Marking it __init as well is clearly correct and it leads to recordmcount no longer complaining. Link: https://lkml.kernel.org/r/20201204165742.3815221-1-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Nathan Chancellor <natechancellor@gmail.com> Cc: Nick Desaulniers <ndesaulniers@google.com> Cc: Barret Rhoden <brho@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-12-12kbuild: avoid static_assert for genksymsArnd Bergmann1-0/+5
genksyms does not know or care about the _Static_assert() built-in, and sometimes falls back to ignoring the later symbols, which causes undefined behavior such as WARNING: modpost: EXPORT symbol "ethtool_set_ethtool_phy_ops" [vmlinux] version generation failed, symbol will not be versioned. ld: net/ethtool/common.o: relocation R_AARCH64_ABS32 against `__crc_ethtool_set_ethtool_phy_ops' can not be used when making a shared object net/ethtool/common.o:(_ftrace_annotated_branch+0x0): dangerous relocation: unsupported relocation Redefine static_assert for genksyms to avoid that. Link: https://lkml.kernel.org/r/20201203230955.1482058-1-arnd@kernel.org Signed-off-by: Arnd Bergmann <arnd@arndb.de> Suggested-by: Ard Biesheuvel <ardb@kernel.org> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Michal Marek <michal.lkml@markovi.net> Cc: Kees Cook <keescook@chromium.org> Cc: Rikard Falkeborn <rikard.falkeborn@gmail.com> Cc: Marco Elver <elver@google.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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