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2020-10-23x86/uaccess: fix code generation in put_user()Rasmus Villemoes
Quoting https://gcc.gnu.org/onlinedocs/gcc/Local-Register-Variables.html: You can define a local register variable and associate it with a specified register... The only supported use for this feature is to specify registers for input and output operands when calling Extended asm (see Extended Asm). This may be necessary if the constraints for a particular machine don't provide sufficient control to select the desired register. On 32-bit x86, this is used to ensure that gcc will put an 8-byte value into the %edx:%eax pair, while all other cases will just use the single register %eax (%rax on x86-64). While the _ASM_AX actually just expands to "%eax", note this comment next to get_user() which does something very similar: * The use of _ASM_DX as the register specifier is a bit of a * simplification, as gcc only cares about it as the starting point * and not size: for a 64-bit value it will use %ecx:%edx on 32 bits * (%ecx being the next register in gcc's x86 register sequence), and * %rdx on 64 bits. However, getting this to work requires that there is no code between the assignment to the local register variable and its use as an input to the asm() which can possibly clobber any of the registers involved - including evaluation of the expressions making up other inputs. In the current code, the ptr expression used directly as an input may cause such code to be emitted. For example, Sean Christopherson observed that with KASAN enabled and ptr being current->set_child_tid (from chedule_tail()), the load of current->set_child_tid causes a call to __asan_load8() to be emitted immediately prior to the __put_user_4 call, and Naresh Kamboju reports that various mmstress tests fail on KASAN-enabled builds. It's also possible to synthesize a broken case without KASAN if one uses "foo()" as the ptr argument, with foo being some "extern u64 __user *foo(void);" (though I don't know if that appears in real code). Fix it by making sure ptr gets evaluated before the assignment to __val_pu, and add a comment that __val_pu must be the last thing computed before the asm() is entered. Cc: Sean Christopherson <sean.j.christopherson@intel.com> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org> Tested-by: Naresh Kamboju <naresh.kamboju@linaro.org> Fixes: d55564cfc222 ("x86: Make __put_user() generate an out-of-line call") Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-10-23smb3: add some missing definitions from MS-FSCCSteve French
Add some structures and defines that were recently added to the protocol documentation (see MS-FSCC sections 2.3.29-2.3.34). Signed-off-by: Steve French <stfrench@microsoft.com>
2020-10-23smb3: remove two unused variablesSteve French
Fix two unused variables in commit "add support for stat of WSL reparse points for special file types" Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-10-23smb3: add support for stat of WSL reparse points for special file typesSteve French
This is needed so when mounting to Windows we do not misinterpret various special files created by Linux (WSL) as symlinks. An earlier patch addressed readdir. This patch fixes stat (getattr). With this patch:   File: /mnt1/char   Size: 0          Blocks: 0          IO Block: 16384  character special file Device: 34h/52d Inode: 844424930132069  Links: 1     Device type: 0,0 Access: (0755/crwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:46:51.839458900 -0500 Modify: 2020-10-21 17:46:51.839458900 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/fifo   Size: 0          Blocks: 0          IO Block: 16384  fifo Device: 34h/52d Inode: 1125899906842722  Links: 1 Access: (0755/prwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 16:21:37.259249700 -0500 Modify: 2020-10-21 16:21:37.259249700 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/block   Size: 0          Blocks: 0          IO Block: 16384  block special file Device: 34h/52d Inode: 844424930132068  Links: 1     Device type: 0,0 Access: (0755/brwxr-xr-x)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:10:47.913103200 -0500 Modify: 2020-10-21 17:10:47.913103200 -0500 Change: 2020-10-21 18:30:39.796725500 -0500  Birth: - without the patch all show up incorrectly as symlinks with annoying "operation not supported error also returned"   File: /mnt1/charstat: cannot read symbolic link '/mnt1/char': Operation not supported   Size: 0          Blocks: 0          IO Block: 16384  symbolic link Device: 34h/52d Inode: 844424930132069  Links: 1 Access: (0000/l---------)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:46:51.839458900 -0500 Modify: 2020-10-21 17:46:51.839458900 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/fifostat: cannot read symbolic link '/mnt1/fifo': Operation not supported   Size: 0          Blocks: 0          IO Block: 16384  symbolic link Device: 34h/52d Inode: 1125899906842722  Links: 1 Access: (0000/l---------)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 16:21:37.259249700 -0500 Modify: 2020-10-21 16:21:37.259249700 -0500 Change: 2020-10-21 18:30:39.797358800 -0500  Birth: -   File: /mnt1/blockstat: cannot read symbolic link '/mnt1/block': Operation not supported   Size: 0          Blocks: 0          IO Block: 16384  symbolic link Device: 34h/52d Inode: 844424930132068  Links: 1 Access: (0000/l---------)  Uid: (    0/    root)   Gid: (    0/    root) Access: 2020-10-21 17:10:47.913103200 -0500 Modify: 2020-10-21 17:10:47.913103200 -0500 Change: 2020-10-21 18:30:39.796725500 -0500 Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2020-10-23Merge tag 'net-5.10-rc1' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net Pull networking fixes from Jakub Kicinski: "Cross-tree/merge window issues: - rtl8150: don't incorrectly assign random MAC addresses; fix late in the 5.9 cycle started depending on a return code from a function which changed with the 5.10 PR from the usb subsystem Current release regressions: - Revert "virtio-net: ethtool configurable RXCSUM", it was causing crashes at probe when control vq was not negotiated/available Previous release regressions: - ixgbe: fix probing of multi-port 10 Gigabit Intel NICs with an MDIO bus, only first device would be probed correctly - nexthop: Fix performance regression in nexthop deletion by effectively switching from recently added synchronize_rcu() to synchronize_rcu_expedited() - netsec: ignore 'phy-mode' device property on ACPI systems; the property is not populated correctly by the firmware, but firmware configures the PHY so just keep boot settings Previous releases - always broken: - tcp: fix to update snd_wl1 in bulk receiver fast path, addressing bulk transfers getting "stuck" - icmp: randomize the global rate limiter to prevent attackers from getting useful signal - r8169: fix operation under forced interrupt threading, make the driver always use hard irqs, even on RT, given the handler is light and only wants to schedule napi (and do so through a _irqoff() variant, preferably) - bpf: Enforce pointer id generation for all may-be-null register type to avoid pointers erroneously getting marked as null-checked - tipc: re-configure queue limit for broadcast link - net/sched: act_tunnel_key: fix OOB write in case of IPv6 ERSPAN tunnels - fix various issues in chelsio inline tls driver Misc: - bpf: improve just-added bpf_redirect_neigh() helper api to support supplying nexthop by the caller - in case BPF program has already done a lookup we can avoid doing another one - remove unnecessary break statements - make MCTCP not select IPV6, but rather depend on it" * tag 'net-5.10-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (62 commits) tcp: fix to update snd_wl1 in bulk receiver fast path net: Properly typecast int values to set sk_max_pacing_rate netfilter: nf_fwd_netdev: clear timestamp in forwarding path ibmvnic: save changed mac address to adapter->mac_addr selftests: mptcp: depends on built-in IPv6 Revert "virtio-net: ethtool configurable RXCSUM" rtnetlink: fix data overflow in rtnl_calcit() net: ethernet: mtk-star-emac: select REGMAP_MMIO net: hdlc_raw_eth: Clear the IFF_TX_SKB_SHARING flag after calling ether_setup net: hdlc: In hdlc_rcv, check to make sure dev is an HDLC device bpf, libbpf: Guard bpf inline asm from bpf_tail_call_static bpf, selftests: Extend test_tc_redirect to use modified bpf_redirect_neigh() bpf: Fix bpf_redirect_neigh helper api to support supplying nexthop mptcp: depends on IPV6 but not as a module sfc: move initialisation of efx->filter_sem to efx_init_struct() mpls: load mpls_gso after mpls_iptunnel net/sched: act_tunnel_key: fix OOB write in case of IPv6 ERSPAN tunnels net/sched: act_gate: Unlock ->tcfa_lock in tc_setup_flow_action() net: dsa: bcm_sf2: make const array static, makes object smaller mptcp: MPTCP_IPV6 should depend on IPV6 instead of selecting it ...
2020-10-23Merge tag 'gfs2-for-5.10' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2 Pull gfs2 updates from Andreas Gruenbacher: - Use iomap for non-journaled buffered I/O. This largely eliminates buffer heads on filesystems where the block size matches the page size. Many thanks to Christoph Hellwig for this patch! - Fixes for some more journaled data filesystem bugs, found by running xfstests with data journaling on for all files (chattr +j $MNT) (Bob Peterson) - gfs2_evict_inode refactoring (Bob Peterson) - Use the statfs data in the journal during recovery instead of reading it in from the local statfs inodes (Abhi Das) - Several other minor fixes by various people * tag 'gfs2-for-5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/gfs2/linux-gfs2: (30 commits) gfs2: Recover statfs info in journal head gfs2: lookup local statfs inodes prior to journal recovery gfs2: Add fields for statfs info in struct gfs2_log_header_host gfs2: Ignore subsequent errors after withdraw in rgrp_go_sync gfs2: Eliminate gl_vm gfs2: Only access gl_delete for iopen glocks gfs2: Fix comments to glock_hash_walk gfs2: eliminate GLF_QUEUED flag in favor of list_empty(gl_holders) gfs2: Ignore journal log writes for jdata holes gfs2: simplify gfs2_block_map gfs2: Only set PageChecked if we have a transaction gfs2: don't lock sd_ail_lock in gfs2_releasepage gfs2: make gfs2_ail1_empty_one return the count of active items gfs2: Wipe jdata and ail1 in gfs2_journal_wipe, formerly gfs2_meta_wipe gfs2: enhance log_blocks trace point to show log blocks free gfs2: add missing log_blocks trace points in gfs2_write_revokes gfs2: rename gfs2_write_full_page to gfs2_write_jdata_page, remove parm gfs2: add validation checks for size of superblock gfs2: use-after-free in sysfs deregistration gfs2: Fix NULL pointer dereference in gfs2_rgrp_dump ...
2020-10-23Merge tag '5.10-rc-smb3-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds
Pull cifs updates from Steve French: - add support for recognizing special file types (char/block/fifo/ symlink) for files created by Linux on WSL (a format we plan to move to as the default for creating special files on Linux, as it has advantages over the other current option, the SFU format) in readdir. - fix double queries to root directory when directory leases not supported (e.g. Samba) - fix querying mode bits (modefromsid mount option) for special file types - stronger encryption (gcm256), disabled by default until tested more broadly - allow querying owner when server reports 'well known SID' on query dir with SMB3.1.1 POSIX extensions * tag '5.10-rc-smb3-fixes-part1' of git://git.samba.org/sfrench/cifs-2.6: (30 commits) SMB3: add support for recognizing WSL reparse tags cifs: remove bogus debug code smb3.1.1: fix typo in compression flag cifs: move smb version mount options into fs_context.c cifs: move cache mount options to fs_context.ch cifs: move security mount options into fs_context.ch cifs: add files to host new mount api smb3: do not try to cache root directory if dir leases not supported smb3: fix stat when special device file and mounted with modefromsid cifs: Print the address and port we are connecting to in generic_ip_connect() SMB3: Resolve data corruption of TCP server info fields cifs: make const array static, makes object smaller SMB3.1.1: Fix ids returned in POSIX query dir smb3: add dynamic trace point to trace when credits obtained smb3.1.1: do not fail if no encryption required but server doesn't support it cifs: Return the error from crypt_message when enc/dec key not found. smb3.1.1: set gcm256 when requested smb3.1.1: rename nonces used for GCM and CCM encryption smb3.1.1: print warning if server does not support requested encryption type smb3.1.1: add new module load parm enable_gcm_256 ...
2020-10-23Merge tag 'vfs-5.10-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linuxLinus Torvalds
Pull clone/dedupe/remap code refactoring from Darrick Wong: "Move the generic file range remap (aka reflink and dedupe) functions out of mm/filemap.c and fs/read_write.c and into fs/remap_range.c to reduce clutter in the first two files" * tag 'vfs-5.10-merge-1' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: vfs: move the generic write and copy checks out of mm vfs: move the remap range helpers to remap_range.c vfs: move generic_remap_checks out of mm
2020-10-23ata: pata_ns87415.c: Document support on parisc with superio chipHelge Deller
I tested this driver on my HP PA-RISC C3000 workstation and it does work with the built-in TEAC CD-532E-B CD-ROM drive. So drop the TODO item and adjust the file header. Signed-off-by: Helge Deller <deller@gmx.de>
2020-10-23ata: fix some kernel-doc markupsMauro Carvalho Chehab
Some functions have different names between their prototypes and the kernel-doc markup. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-23block: blk-mq: fix a kernel-doc markupMauro Carvalho Chehab
Fix a typo: blk_mq_run_hw_queue -> blk_mq_run_hw_queues Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> Signed-off-by: Jens Axboe <axboe@kernel.dk>
2020-10-23Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds
Pull KVM updates from Paolo Bonzini: "For x86, there is a new alternative and (in the future) more scalable implementation of extended page tables that does not need a reverse map from guest physical addresses to host physical addresses. For now it is disabled by default because it is still lacking a few of the existing MMU's bells and whistles. However it is a very solid piece of work and it is already available for people to hammer on it. Other updates: ARM: - New page table code for both hypervisor and guest stage-2 - Introduction of a new EL2-private host context - Allow EL2 to have its own private per-CPU variables - Support of PMU event filtering - Complete rework of the Spectre mitigation PPC: - Fix for running nested guests with in-kernel IRQ chip - Fix race condition causing occasional host hard lockup - Minor cleanups and bugfixes x86: - allow trapping unknown MSRs to userspace - allow userspace to force #GP on specific MSRs - INVPCID support on AMD - nested AMD cleanup, on demand allocation of nested SVM state - hide PV MSRs and hypercalls for features not enabled in CPUID - new test for MSR_IA32_TSC writes from host and guest - cleanups: MMU, CPUID, shared MSRs - LAPIC latency optimizations ad bugfixes" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (232 commits) kvm: x86/mmu: NX largepage recovery for TDP MMU kvm: x86/mmu: Don't clear write flooding count for direct roots kvm: x86/mmu: Support MMIO in the TDP MMU kvm: x86/mmu: Support write protection for nesting in tdp MMU kvm: x86/mmu: Support disabling dirty logging for the tdp MMU kvm: x86/mmu: Support dirty logging for the TDP MMU kvm: x86/mmu: Support changed pte notifier in tdp MMU kvm: x86/mmu: Add access tracking for tdp_mmu kvm: x86/mmu: Support invalidate range MMU notifier for TDP MMU kvm: x86/mmu: Allocate struct kvm_mmu_pages for all pages in TDP MMU kvm: x86/mmu: Add TDP MMU PF handler kvm: x86/mmu: Remove disallowed_hugepage_adjust shadow_walk_iterator arg kvm: x86/mmu: Support zapping SPTEs in the TDP MMU KVM: Cache as_id in kvm_memory_slot kvm: x86/mmu: Add functions to handle changed TDP SPTEs kvm: x86/mmu: Allocate and free TDP MMU roots kvm: x86/mmu: Init / Uninit the TDP MMU kvm: x86/mmu: Introduce tdp_iter KVM: mmu: extract spte.h and spte.c KVM: mmu: Separate updating a PTE from kvm_set_pte_rmapp ...
2020-10-23parisc: Add wrapper syscalls to fix O_NONBLOCK flag usageHelge Deller
The commit 75ae04206a4d ("parisc: Define O_NONBLOCK to become 000200000") changed the O_NONBLOCK constant to have only one bit set (like all other architectures). This change broke some existing userspace code (e.g. udevadm, systemd-udevd, elogind) which called specific syscalls which do strict value checking on their flag parameter. This patch adds wrapper functions for the relevant syscalls. The wrappers masks out any old invalid O_NONBLOCK flags, reports in the syslog if the old O_NONBLOCK value was used and then calls the target syscall with the new O_NONBLOCK value. Fixes: 75ae04206a4d ("parisc: Define O_NONBLOCK to become 000200000") Signed-off-by: Helge Deller <deller@gmx.de> Tested-by: Meelis Roos <mroos@linux.ee> Tested-by: Jeroen Roovers <jer@xs4all.nl>
2020-10-23Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhostLinus Torvalds
Pull virtio updates from Michael Tsirkin: "vhost, vdpa, and virtio cleanups and fixes A very quiet cycle, no new features" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: MAINTAINERS: add URL for virtio-mem vhost_vdpa: remove unnecessary spin_lock in vhost_vring_call vringh: fix __vringh_iov() when riov and wiov are different vdpa/mlx5: Setup driver only if VIRTIO_CONFIG_S_DRIVER_OK s390: virtio: PV needs VIRTIO I/O device protection virtio: let arch advertise guest's memory access restrictions vhost_vdpa: Fix duplicate included kernel.h vhost: reduce stack usage in log_used virtio-mem: Constify mem_id_table virtio_input: Constify id_table virtio-balloon: Constify id_table vdpa/mlx5: Fix failure to bring link up vdpa/mlx5: Make use of a specific 16 bit endianness API
2020-10-23Merge tag 'tag-chrome-platform-for-v5.10' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux Pull chrome platform updates from Benson Leung: "cros-ec: - Error code cleanup across cros-ec by Guenter - Remove cros_ec_cmd_xfer in favor of cros_ec_cmd_xfer_status cros_ec_typec: - Landed initial USB4 support in typec connector class driver for cros_ec - Role switch bugfix on disconnect, and reordering configuration steps cros_ec_lightbar: - Fix buffer outsize and result for get_lightbar_version misc: - Remove config MFD_CROS_EC, now that transition from MFD is complete - Enable KEY_LEFTMETA in new location on arm based cros-ec-keyboard keymap" * tag 'tag-chrome-platform-for-v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/chrome-platform/linux: ARM: dts: cros-ec-keyboard: Add alternate keymap for KEY_LEFTMETA platform/chrome: Use kobj_to_dev() instead of container_of() platform/chrome: cros_ec_proto: Drop cros_ec_cmd_xfer() platform/chrome: cros_ec_proto: Update cros_ec_cmd_xfer() call-sites platform/chrome: Kconfig: Remove the transitional MFD_CROS_EC config platform/chrome: cros_ec_lightbar: Reduce ligthbar get version command platform/chrome: cros_ec_trace: Add fields to command traces platform/chrome: cros_ec_typec: Re-order connector configuration steps platform/chrome: cros_ec_typec: Avoid setting usb role twice during disconnect platform/chrome: cros_ec_typec: Send enum values to usb_role_switch_set_role() platform/chrome: cros_ec_typec: USB4 support pwm: cros-ec: Simplify EC error handling platform/chrome: cros_ec_proto: Convert EC error codes to Linux error codes platform/input: cros_ec: Replace -ENOTSUPP with -ENOPROTOOPT pwm: cros-ec: Accept more error codes from cros_ec_cmd_xfer_status platform/chrome: cros_ec_sysfs: Report range of error codes from EC cros_ec_lightbar: Accept more error codes from cros_ec_cmd_xfer_status iio: cros_ec: Accept -EOPNOTSUPP as 'not supported' error code
2020-10-23Merge tag 'arch-cleanup-2020-10-22' of git://git.kernel.dk/linux-blockLinus Torvalds
Pull arch task_work cleanups from Jens Axboe: "Two cleanups that don't fit other categories: - Finally get the task_work_add() cleanup done properly, so we don't have random 0/1/false/true/TWA_SIGNAL confusing use cases. Updates all callers, and also fixes up the documentation for task_work_add(). - While working on some TIF related changes for 5.11, this TIF_NOTIFY_RESUME cleanup fell out of that. Remove some arch duplication for how that is handled" * tag 'arch-cleanup-2020-10-22' of git://git.kernel.dk/linux-block: task_work: cleanup notification modes tracehook: clear TIF_NOTIFY_RESUME in tracehook_notify_resume()
2020-10-23Merge tag 'arc-5.10-rc1-fixes' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC fix from Vineet Gupta: "I found a snafu in perf driver which made it into 5.9-rc4 and the fix should go in now than wait" * tag 'arc-5.10-rc1-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: perf: redo the pct irq missing in device-tree handling
2020-10-23Merge tag 'arm64-upstream' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux Pull more arm64 updates from Will Deacon: "A small selection of further arm64 fixes and updates. Most of these are fixes that came in during the merge window, with the exception of the HAVE_MOVE_PMD mremap() speed-up which we discussed back in 2018 and somehow forgot to enable upstream. - Improve performance of Spectre-v2 mitigation on Falkor CPUs (if you're lucky enough to have one) - Select HAVE_MOVE_PMD. This has been shown to improve mremap() performance, which is used heavily by the Android runtime GC, and it seems we forgot to enable this upstream back in 2018. - Ensure linker flags are consistent between LLVM and BFD - Fix stale comment in Spectre mitigation rework - Fix broken copyright header - Fix KASLR randomisation of the linear map - Prevent arm64-specific prctl()s from compat tasks (return -EINVAL)" Link: https://lore.kernel.org/kvmarm/20181108181201.88826-3-joelaf@google.com/ * tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: arm64: proton-pack: Update comment to reflect new function name arm64: spectre-v2: Favour CPU-specific mitigation at EL2 arm64: link with -z norelro regardless of CONFIG_RELOCATABLE arm64: Fix a broken copyright header in gen_vdso_offsets.sh arm64: mremap speedup - Enable HAVE_MOVE_PMD arm64: mm: use single quantity to represent the PA to VA translation arm64: reject prctl(PR_PAC_RESET_KEYS) on compat tasks
2020-10-23Merge branches 'acpi-debug', 'acpi-reboot', 'acpi-processor', 'acpi-dptf' ↵Rafael J. Wysocki
and 'acpi-utils' * acpi-debug: ACPI: debug: don't allow debugging when ACPI is disabled * acpi-reboot: ACPI: reboot: Avoid racing after writing to ACPI RESET_REG * acpi-processor: ACPI: processor: remove comment regarding string _UID support * acpi-dptf: ACPI: DPTF: Add ACPI_DPTF Kconfig menu ACPI: DPTF: Fix participant driver names * acpi-utils: ACPI: utils: remove unreachable breaks
2020-10-23Merge branch 'pm-avs'Rafael J. Wysocki
* pm-avs: PM: AVS: Drop the avs directory and the corresponding Kconfig PM: AVS: qcom-cpr: Move the driver to the qcom specific drivers PM: AVS: smartreflex Move driver to soc specific drivers PM: AVS: rockchip-io: Move the driver to the rockchip specific drivers
2020-10-23Merge branches 'pm-core', 'pm-sleep', 'pm-tools' and 'powercap'Rafael J. Wysocki
* pm-core: PM: runtime: Fix typo in pm_runtime_set_active() helper comment * pm-sleep: PM: sleep: remove unreachable break * pm-tools: cpupower: speed up generating git version string cpupowerutils: fix spelling mistake "dependant" -> "dependent" * powercap: powercap: Fix typo in Kconfig "Plance" -> "Plane" powercap/intel_rapl: enumerate Psys RAPL domain together with package RAPL domain powercap/intel_rapl: Fix domain detection
2020-10-23Merge branches 'pm-cpufreq' and 'pm-cpuidle'Rafael J. Wysocki
* pm-cpufreq: cpufreq: schedutil: restore cached freq when next_f is not changed acpi-cpufreq: Honor _PSD table setting on new AMD CPUs cpufreq: intel_pstate: Delete intel_pstate sysfs if failed to register the driver cpufreq: Improve code around unlisted freq check * pm-cpuidle: intel_idle: Ignore _CST if control cannot be taken from the platform cpuidle: Remove pointless stub intel_idle: mention assumption that WBINVD is not needed MAINTAINERS: Add section for cpuidle-psci PM domain
2020-10-23gfs2: Recover statfs info in journal headAbhi Das
Apply the outstanding statfs changes in the journal head to the master statfs file. Zero out the local statfs file for good measure. Previously, statfs updates would be read in from the local statfs inode and synced to the master statfs inode during recovery. We now use the statfs updates in the journal head to update the master statfs inode instead of reading in from the local statfs inode. To preserve backward compatibility with kernels that can't do this, we still need to keep the local statfs inode up to date by writing changes to it. At some point in the future, we can do away with the local statfs inodes altogether and keep the statfs changes solely in the journal. Signed-off-by: Abhi Das <adas@redhat.com> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2020-10-23gfs2: lookup local statfs inodes prior to journal recoveryAbhi Das
We need to lookup the master statfs inode and the local statfs inodes earlier in the mount process (in init_journal) so journal recovery can use them when it attempts to recover the statfs info. We lookup all the local statfs inodes and store them in a linked list to allow a node to recover statfs info for other nodes in the cluster. Signed-off-by: Abhi Das <adas@redhat.com> Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
2020-10-23Merge tag 'nvme-5.10-2020-10-23' of git://git.infradead.org/nvme into block-5.10Jens Axboe
Pull NVMe fixes from Christoph: "nvme fixes for 5.10 - rdma error handling fixes (Chao Leng) - fc error handling and reconnect fixes (James Smart) - fix the qid displace when tracing ioctl command (Keith Busch) - don't use BLK_MQ_REQ_NOWAIT for passthru (Chaitanya Kulkarni) - fix MTDT for passthru (Logan Gunthorpe) - blacklist Write Same on more devices (Kai-Heng Feng) - fix an uninitialized work struct (zhenwei pi)" * tag 'nvme-5.10-2020-10-23' of git://git.infradead.org/nvme: nvme-fc: shorten reconnect delay if possible for FC nvme-fc: wait for queues to freeze before calling update_hr_hw_queues nvme-fc: fix error loop in create_hw_io_queues nvme-fc: fix io timeout to abort I/O nvmet: don't use BLK_MQ_REQ_NOWAIT for passthru nvmet: cleanup nvmet_passthru_map_sg() nvmet: limit passthru MTDS by BIO_MAX_PAGES nvmet: fix uninitialized work for zero kato nvme-pci: disable Write Zeroes on Sandisk Skyhawk nvme: use queuedata for nvme_req_qid nvme-rdma: fix crash due to incorrect cqe nvme-rdma: fix crash when connect rejected
2020-10-23nvme-fc: shorten reconnect delay if possible for FCJames Smart
We've had several complaints about a 10s reconnect delay (the default) when there was an error while there is connectivity to a subsystem. The max_reconnects and reconnect_delay are set in common code prior to calling the transport to create the controller. This change checks if the default reconnect delay is being used, and if so, it adjusts it to a shorter period (2s) for the nvme-fc transport. It does so by calculating the controller loss tmo window, changing the value of the reconnect delay, and then recalculating the maximum number of reconnect attempts allowed. Signed-off-by: James Smart <james.smart@broadcom.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-23nvme-fc: wait for queues to freeze before calling update_hr_hw_queuesJames Smart
On reconnect, the code currently does not freeze the controller before possibly updating the number hw queues for the controller. Add the freeze before updating the number of hw queues. Note: the queues are already started and remain started through the reconnect. Signed-off-by: James Smart <james.smart@broadcom.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-23nvme-fc: fix error loop in create_hw_io_queuesJames Smart
The loop that backs out of hw io queue creation continues through index 0, which corresponds to the admin queue as well. Fix the loop so it only proceeds through indexes 1..n which correspond to I/O queues. Signed-off-by: James Smart <james.smart@broadcom.com> Reviewed-by: Himanshu Madhani <himanshu.madhani@oracle.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-23nvme-fc: fix io timeout to abort I/OJames Smart
Currently, an I/O timeout unconditionally invokes nvme_fc_error_recovery() which checks for LIVE or CONNECTING state. If live, the routine resets the controller which initiates a reconnect - which is valid. If CONNECTING, err_work is scheduled. Err_work then calls the terminate_io routine, which also checks for CONNECTING and noops any further action on outstanding I/O. The result is nothing happened to the timed out io. As such, if the command was dropped on the wire, it will never timeout / complete, and the connect process will hang. Change the behavior of the io timeout routine to unconditionally abort the I/O. I/O completion handling will note that an io failed due to an abort and will terminate the connection / association as needed. If the abort was unable to happen, continue with a call to nvme_fc_error_recovery(). To ensure something different happens in nvme_fc_error_recovery() rework it so at it will abort all I/Os on the association to force a failure. As I/O aborts now may occur outside of delete_association, counting for completion must be wary and only count those aborted during delete_association when TERMIO is set on the controller. Signed-off-by: James Smart <james.smart@broadcom.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
2020-10-23Documentation: add xen.fifo_events kernel parameter descriptionJuergen Gross
The kernel boot parameter xen.fifo_events isn't listed in Documentation/admin-guide/kernel-parameters.txt. Add it. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Link: https://lore.kernel.org/r/20201022094907.28560-6-jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2020-10-23xen/events: unmask a fifo event channel only if it was maskedJuergen Gross
Unmasking an event channel with fifo events channels being used can require a hypercall to be made, so try to avoid that by checking whether the event channel was really masked. Suggested-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Link: https://lore.kernel.org/r/20201022094907.28560-5-jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2020-10-23xen/events: only register debug interrupt for 2-level eventsJuergen Gross
xen_debug_interrupt() is specific to 2-level event handling. So don't register it with fifo event handling being active. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Link: https://lore.kernel.org/r/20201022094907.28560-4-jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2020-10-23xen/events: make struct irq_info private to events_base.cJuergen Gross
The struct irq_info of Xen's event handling is used only for two evtchn_ops functions outside of events_base.c. Those two functions can easily be switched to avoid that usage. This allows to make struct irq_info and its related access functions private to events_base.c. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Link: https://lore.kernel.org/r/20201022094907.28560-3-jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2020-10-23xen: remove no longer used functionsJuergen Gross
With the switch to the lateeoi model for interdomain event channels some functions are no longer in use. Remove them. Suggested-by: Jan Beulich <jbeulich@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Jan Beulich <jbeulich@suse.com> Link: https://lore.kernel.org/r/20201022094907.28560-2-jgross@suse.com Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
2020-10-23dma-mapping: document dma_{alloc,free}_pagesChristoph Hellwig
Document the new dma_alloc_pages and dma_free_pages APIs, and fix up the documentation for dma_alloc_noncoherent and dma_free_noncoherent. Reported-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Robin Murphy <robin.murphy@arm.com>
2020-10-23kvm: x86/mmu: NX largepage recovery for TDP MMUBen Gardon
When KVM maps a largepage backed region at a lower level in order to make it executable (i.e. NX large page shattering), it reduces the TLB performance of that region. In order to avoid making this degradation permanent, KVM must periodically reclaim shattered NX largepages by zapping them and allowing them to be rebuilt in the page fault handler. With this patch, the TDP MMU does not respect KVM's rate limiting on reclaim. It traverses the entire TDP structure every time. This will be addressed in a future patch. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20201014182700.2888246-21-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23kvm: x86/mmu: Don't clear write flooding count for direct rootsBen Gardon
Direct roots don't have a write flooding count because the guest can't affect that paging structure. Thus there's no need to clear the write flooding count on a fast CR3 switch for direct roots. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20201014182700.2888246-20-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23kvm: x86/mmu: Support MMIO in the TDP MMUBen Gardon
In order to support MMIO, KVM must be able to walk the TDP paging structures to find mappings for a given GFN. Support this walk for the TDP MMU. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 v2: Thanks to Dan Carpenter and kernel test robot for finding that root was used uninitialized in get_mmio_spte. Signed-off-by: Ben Gardon <bgardon@google.com> Reported-by: kernel test robot <lkp@intel.com> Reported-by: Dan Carpenter <dan.carpenter@oracle.com> Message-Id: <20201014182700.2888246-19-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23kvm: x86/mmu: Support write protection for nesting in tdp MMUBen Gardon
To support nested virtualization, KVM will sometimes need to write protect pages which are part of a shadowed paging structure or are not writable in the shadowed paging structure. Add a function to write protect GFN mappings for this purpose. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20201014182700.2888246-18-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23kvm: x86/mmu: Support disabling dirty logging for the tdp MMUBen Gardon
Dirty logging ultimately breaks down MMU mappings to 4k granularity. When dirty logging is no longer needed, these granaular mappings represent a useless performance penalty. When dirty logging is disabled, search the paging structure for mappings that could be re-constituted into a large page mapping. Zap those mappings so that they can be faulted in again at a higher mapping level. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20201014182700.2888246-17-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23kvm: x86/mmu: Support dirty logging for the TDP MMUBen Gardon
Dirty logging is a key feature of the KVM MMU and must be supported by the TDP MMU. Add support for both the write protection and PML dirty logging modes. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20201014182700.2888246-16-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23kvm: x86/mmu: Support changed pte notifier in tdp MMUBen Gardon
In order to interoperate correctly with the rest of KVM and other Linux subsystems, the TDP MMU must correctly handle various MMU notifiers. Add a hook and handle the change_pte MMU notifier. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20201014182700.2888246-15-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23kvm: x86/mmu: Add access tracking for tdp_mmuBen Gardon
In order to interoperate correctly with the rest of KVM and other Linux subsystems, the TDP MMU must correctly handle various MMU notifiers. The main Linux MM uses the access tracking MMU notifiers for swap and other features. Add hooks to handle the test/flush HVA (range) family of MMU notifiers. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20201014182700.2888246-14-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23kvm: x86/mmu: Support invalidate range MMU notifier for TDP MMUBen Gardon
In order to interoperate correctly with the rest of KVM and other Linux subsystems, the TDP MMU must correctly handle various MMU notifiers. Add hooks to handle the invalidate range family of MMU notifiers. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20201014182700.2888246-13-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23kvm: x86/mmu: Allocate struct kvm_mmu_pages for all pages in TDP MMUBen Gardon
Attach struct kvm_mmu_pages to every page in the TDP MMU to track metadata, facilitate NX reclaim, and enable inproved parallelism of MMU operations in future patches. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20201014182700.2888246-12-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23kvm: x86/mmu: Add TDP MMU PF handlerBen Gardon
Add functions to handle page faults in the TDP MMU. These page faults are currently handled in much the same way as the x86 shadow paging based MMU, however the ordering of some operations is slightly different. Future patches will add eager NX splitting, a fast page fault handler, and parallel page faults. Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell machine. This series introduced no new failures. This series can be viewed in Gerrit at: https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538 Signed-off-by: Ben Gardon <bgardon@google.com> Message-Id: <20201014182700.2888246-11-bgardon@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-10-23Merge tag 'drm-intel-next-fixes-2020-10-22' of ↵Dave Airlie
git://anongit.freedesktop.org/drm/drm-intel into drm-next - Tweak initia DPCD backlight.enabled value (Sean) - Initialize reserved MOCS indices (Ayaz) - Mark initial fb obj as WT on eLLC machines to avoid rcu lockup (Ville) - Support parsing of oversize batches (Chris) - Delay execlists processing for TGL (Chris) - Use the active reference on the vma during error capture (Chris) - Widen CSB pointer (Chris) - Wait for CSB entries on TGL (Chris) - Fix unwind for scratch page allocation (Chris) - Exclude low patches of stolen memory (Chris) - Force VT'd workarounds when running as a guest OS (Chris) - Drop runtime-pm assert from vpgu io accessors (Chris) Signed-off-by: Dave Airlie <airlied@redhat.com> From: Rodrigo Vivi <rodrigo.vivi@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201022205613.GA3469192@intel.com
2020-10-23Merge tag 'amd-drm-fixes-5.10-2020-10-21' of ↵Dave Airlie
git://people.freedesktop.org/~agd5f/linux into drm-next amd-drm-fixes-5.10-2020-10-21: amdgpu: - Sienna Cichlid fixes - MST manager resource leak fix - GPU reset fix amdkfd: - Luxmark fix for Navi1x Signed-off-by: Dave Airlie <airlied@redhat.com> From: Alex Deucher <alexdeucher@gmail.com> Link: https://patchwork.freedesktop.org/patch/msgid/20201022040322.4183-1-alexander.deucher@amd.com
2020-10-22docs: Add two missing entries in vm sysctl indexFam Zheng
Both seem overlooked while adding the section in the main content. Signed-off-by: Fam Zheng <famzheng@amazon.com> Link: https://lore.kernel.org/r/20201022065403.3936070-1-fam@euphon.net Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2020-10-22docs/vm: trivial fixes to several spelling mistakesColin Ian King
Fix several spelling mistakes in vm documentation. Signed-off-by: Colin Ian King <colin.king@canonical.com> Link: https://lore.kernel.org/r/20201022142653.254429-1-colin.king@canonical.com Signed-off-by: Jonathan Corbet <corbet@lwn.net>