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8117 Commits

Author SHA1 Message Date
Linus Torvalds
a022f7d575 Merge tag 'block-5.14-2021-07-08' of git://git.kernel.dk/linux-block 
Pull more block updates from Jens Axboe:
 "A combination of changes that ended up depending on both the driver
  and core branch (and/or the IDE removal), and a few late arriving
  fixes. In detail:

   - Fix io ticks wrap-around issue (Chunguang)

   - nvme-tcp sock locking fix (Maurizio)

   - s390-dasd fixes (Kees, Christoph)

   - blk_execute_rq polling support (Keith)

   - blk-cgroup RCU iteration fix (Yu)

   - nbd backend ID addition (Prasanna)

   - Partition deletion fix (Yufen)

   - Use blk_mq_alloc_disk for mmc, mtip32xx, ubd (Christoph)

   - Removal of now dead block request types due to IDE removal
     (Christoph)

   - Loop probing and control device cleanups (Christoph)

   - Device uevent fix (Christoph)

   - Misc cleanups/fixes (Tetsuo, Christoph)"

* tag 'block-5.14-2021-07-08' of git://git.kernel.dk/linux-block: (34 commits)
  blk-cgroup: prevent rcu_sched detected stalls warnings while iterating blkgs
  block: fix the problem of io_ticks becoming smaller
  nvme-tcp: can't set sk_user_data without write_lock
  loop: remove unused variable in loop_set_status()
  block: remove the bdgrab in blk_drop_partitions
  block: grab a device refcount in disk_uevent
  s390/dasd: Avoid field over-reading memcpy()
  dasd: unexport dasd_set_target_state
  block: check disk exist before trying to add partition
  ubd: remove dead code in ubd_setup_common
  nvme: use return value from blk_execute_rq()
  block: return errors from blk_execute_rq()
  nvme: use blk_execute_rq() for passthrough commands
  block: support polling through blk_execute_rq
  block: remove REQ_OP_SCSI_{IN,OUT}
  block: mark blk_mq_init_queue_data static
  loop: rewrite loop_exit using idr_for_each_entry
  loop: split loop_lookup
  loop: don't allow deleting an unspecified loop device
  loop: move loop_ctl_mutex locking into loop_add
  ...
 2021-07-09 12:05:33 -07:00
Linus Torvalds
1eb8df1867 Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost 
Pull virtio,vhost,vdpa updates from Michael Tsirkin:

 - Doorbell remapping for ifcvf, mlx5

 - virtio_vdpa support for mlx5

 - Validate device input in several drivers (for SEV and friends)

 - ZONE_MOVABLE aware handling in virtio-mem

 - Misc fixes, cleanups

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (48 commits)
  virtio-mem: prioritize unplug from ZONE_MOVABLE in Big Block Mode
  virtio-mem: simplify high-level unplug handling in Big Block Mode
  virtio-mem: prioritize unplug from ZONE_MOVABLE in Sub Block Mode
  virtio-mem: simplify high-level unplug handling in Sub Block Mode
  virtio-mem: simplify high-level plug handling in Sub Block Mode
  virtio-mem: use page_zonenum() in virtio_mem_fake_offline()
  virtio-mem: don't read big block size in Sub Block Mode
  virtio/vdpa: clear the virtqueue state during probe
  vp_vdpa: allow set vq state to initial state after reset
  virtio-pci library: introduce vp_modern_get_driver_features()
  vdpa: support packed virtqueue for set/get_vq_state()
  virtio-ring: store DMA metadata in desc_extra for split virtqueue
  virtio: use err label in __vring_new_virtqueue()
  virtio_ring: introduce virtqueue_desc_add_split()
  virtio_ring: secure handling of mapping errors
  virtio-ring: factor out desc_extra allocation
  virtio_ring: rename vring_desc_extra_packed
  virtio-ring: maintain next in extra state for packed virtqueue
  vdpa/mlx5: Clear vq ready indication upon device reset
  vdpa/mlx5: Add support for doorbell bypassing
  ...
 2021-07-09 11:06:29 -07:00
Linus Torvalds
dcf3c935dd Merge tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml 
Pull UML updates from Richard Weinberger:

 - Support for optimized routines based on the host CPU

 - Support for PCI via virtio

 - Various fixes

* tag 'for-linus-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml:
  um: remove unneeded semicolon in um_arch.c
  um: Remove the repeated declaration
  um: fix error return code in winch_tramp()
  um: fix error return code in slip_open()
  um: Fix stack pointer alignment
  um: implement flush_cache_vmap/flush_cache_vunmap
  um: add a UML specific futex implementation
  um: enable the use of optimized xor routines in UML
  um: Add support for host CPU flags and alignment
  um: allow not setting extra rpaths in the linux binary
  um: virtio/pci: enable suspend/resume
  um: add PCI over virtio emulation driver
  um: irqs: allow invoking time-travel handler multiple times
  um: time-travel/signals: fix ndelay() in interrupt
  um: expose time-travel mode to userspace side
  um: export signals_enabled directly
  um: remove unused smp_sigio_handler() declaration
  lib: add iomem emulation (logic_iomem)
  um: allow disabling NO_IOMEM
 2021-07-09 10:19:13 -07:00
Linus Torvalds
bd9c350603 Merge branch 'akpm' (patches from Andrew) 
Pull yet more updates from Andrew Morton:
 "54 patches.

  Subsystems affected by this patch series: lib, mm (slub, secretmem,
  cleanups, init, pagemap, and mremap), and debug"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (54 commits)
  powerpc/mm: enable HAVE_MOVE_PMD support
  powerpc/book3s64/mm: update flush_tlb_range to flush page walk cache
  mm/mremap: allow arch runtime override
  mm/mremap: hold the rmap lock in write mode when moving page table entries.
  mm/mremap: use pmd/pud_poplulate to update page table entries
  mm/mremap: don't enable optimized PUD move if page table levels is 2
  mm/mremap: convert huge PUD move to separate helper
  selftest/mremap_test: avoid crash with static build
  selftest/mremap_test: update the test to handle pagesize other than 4K
  mm: rename p4d_page_vaddr to p4d_pgtable and make it return pud_t *
  mm: rename pud_page_vaddr to pud_pgtable and make it return pmd_t *
  kdump: use vmlinux_build_id to simplify
  buildid: fix kernel-doc notation
  buildid: mark some arguments const
  scripts/decode_stacktrace.sh: indicate 'auto' can be used for base path
  scripts/decode_stacktrace.sh: silence stderr messages from addr2line/nm
  scripts/decode_stacktrace.sh: support debuginfod
  x86/dumpstack: use %pSb/%pBb for backtrace printing
  arm64: stacktrace: use %pSb for backtrace printing
  module: add printk formats to add module build ID to stacktraces
  ...
 2021-07-09 09:29:13 -07:00
Linus Torvalds
316a2c9b6a Merge tag 'pci-v5.14-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci 
Pull pci updates from Bjorn Helgaas:
 "Enumeration:
   - Fix dsm_label_utf16s_to_utf8s() buffer overrun (Krzysztof
     Wilczyński)
   - Rely on lengths from scnprintf(), dsm_label_utf16s_to_utf8s()
     (Krzysztof Wilczyński)
   - Use sysfs_emit() and sysfs_emit_at() in "show" functions (Krzysztof
     Wilczyński)
   - Fix 'resource_alignment' newline issues (Krzysztof Wilczyński)
   - Add 'devspec' newline (Krzysztof Wilczyński)
   - Dynamically map ECAM regions (Russell King)

  Resource management:
   - Coalesce host bridge contiguous apertures (Kai-Heng Feng)

  PCIe native device hotplug:
   - Ignore Link Down/Up caused by DPC (Lukas Wunner)

  Power management:
   - Leave Apple Thunderbolt controllers on for s2idle or standby
     (Konstantin Kharlamov)

  Virtualization:
   - Work around Huawei Intelligent NIC VF FLR erratum (Chiqijun)
   - Clarify error message for unbound IOV devices (Moritz Fischer)
   - Add pci_reset_bus_function() Secondary Bus Reset interface (Raphael
     Norwitz)

  Peer-to-peer DMA:
   - Simplify distance calculation (Christoph Hellwig)
   - Finish RCU conversion of pdev->p2pdma (Eric Dumazet)
   - Rename upstream_bridge_distance() and rework doc (Logan Gunthorpe)
   - Collect acs list in stack buffer to avoid sleeping (Logan
     Gunthorpe)
   - Use correct calc_map_type_and_dist() return type (Logan Gunthorpe)
   - Warn if host bridge not in whitelist (Logan Gunthorpe)
   - Refactor pci_p2pdma_map_type() (Logan Gunthorpe)
   - Avoid pci_get_slot(), which may sleep (Logan Gunthorpe)

  Altera PCIe controller driver:
   - Add Joyce Ooi as Altera PCIe maintainer (Joyce Ooi)

  Broadcom iProc PCIe controller driver:
   - Fix multi-MSI base vector number allocation (Sandor Bodo-Merle)
   - Support multi-MSI only on uniprocessor kernel (Sandor Bodo-Merle)

  Freescale i.MX6 PCIe controller driver:
   - Limit DBI register length for imx6qp PCIe (Richard Zhu)
   - Add "vph-supply" for PHY supply voltage (Richard Zhu)
   - Enable PHY internal regulator when supplied >3V (Richard Zhu)
   - Remove imx6_pcie_probe() redundant error message (Zhen Lei)

  Intel Gateway PCIe controller driver:
   - Fix INTx enable (Martin Blumenstingl)

  Marvell Aardvark PCIe controller driver:
   - Fix checking for PIO Non-posted Request (Pali Rohár)
   - Implement workaround for the readback value of VEND_ID (Pali Rohár)

  MediaTek PCIe controller driver:
   - Remove redundant error printing in mtk_pcie_subsys_powerup() (Zhen
     Lei)

  MediaTek PCIe Gen3 controller driver:
   - Add missing MODULE_DEVICE_TABLE (Zou Wei)

  Microchip PolarFlare PCIe controller driver:
   - Make struct event_descs static (Krzysztof Wilczyński)

  Microsoft Hyper-V host bridge driver:
   - Fix race condition when removing the device (Long Li)
   - Remove bus device removal unused refcount/functions (Long Li)

  Mobiveil PCIe controller driver:
   - Remove unused readl and writel functions (Krzysztof Wilczyński)

  NVIDIA Tegra PCIe controller driver:
   - Add missing MODULE_DEVICE_TABLE (Zou Wei)

  NVIDIA Tegra194 PCIe controller driver:
   - Fix tegra_pcie_ep_raise_msi_irq() ill-defined shift (Jon Hunter)
   - Fix host initialization during resume (Vidya Sagar)

  Rockchip PCIe controller driver:
   - Register IRQ handlers after device and data are ready (Javier
     Martinez Canillas)"

* tag 'pci-v5.14-changes' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci: (48 commits)
  PCI/P2PDMA: Finish RCU conversion of pdev->p2pdma
  PCI: xgene: Annotate __iomem pointer
  PCI: Fix kernel-doc formatting
  PCI: cpcihp: Declare cpci_debug in header file
  MAINTAINERS: Add Joyce Ooi as Altera PCIe maintainer
  PCI: rockchip: Register IRQ handlers after device and data are ready
  PCI: tegra194: Fix tegra_pcie_ep_raise_msi_irq() ill-defined shift
  PCI: aardvark: Implement workaround for the readback value of VEND_ID
  PCI: aardvark: Fix checking for PIO Non-posted Request
  PCI: tegra194: Fix host initialization during resume
  PCI: tegra: Add missing MODULE_DEVICE_TABLE
  PCI: imx6: Enable PHY internal regulator when supplied >3V
  dt-bindings: imx6q-pcie: Add "vph-supply" for PHY supply voltage
  PCI: imx6: Limit DBI register length for imx6qp PCIe
  PCI: imx6: Remove imx6_pcie_probe() redundant error message
  PCI: intel-gw: Fix INTx enable
  PCI: iproc: Support multi-MSI only on uniprocessor kernel
  PCI: iproc: Fix multi-MSI base vector number allocation
  PCI: mediatek-gen3: Add missing MODULE_DEVICE_TABLE
  PCI: Dynamically map ECAM regions
  ...
 2021-07-08 12:06:20 -07:00
Mike Rapoport
1507f51255 mm: introduce memfd_secret system call to create "secret" memory areas 
Introduce "memfd_secret" system call with the ability to create memory
areas visible only in the context of the owning process and not mapped not
only to other processes but in the kernel page tables as well.

The secretmem feature is off by default and the user must explicitly
enable it at the boot time.

Once secretmem is enabled, the user will be able to create a file
descriptor using the memfd_secret() system call.  The memory areas created
by mmap() calls from this file descriptor will be unmapped from the kernel
direct map and they will be only mapped in the page table of the processes
that have access to the file descriptor.

Secretmem is designed to provide the following protections:

* Enhanced protection (in conjunction with all the other in-kernel
  attack prevention systems) against ROP attacks.  Seceretmem makes
  "simple" ROP insufficient to perform exfiltration, which increases the
  required complexity of the attack.  Along with other protections like
  the kernel stack size limit and address space layout randomization which
  make finding gadgets is really hard, absence of any in-kernel primitive
  for accessing secret memory means the one gadget ROP attack can't work.
  Since the only way to access secret memory is to reconstruct the missing
  mapping entry, the attacker has to recover the physical page and insert
  a PTE pointing to it in the kernel and then retrieve the contents.  That
  takes at least three gadgets which is a level of difficulty beyond most
  standard attacks.

* Prevent cross-process secret userspace memory exposures.  Once the
  secret memory is allocated, the user can't accidentally pass it into the
  kernel to be transmitted somewhere.  The secreremem pages cannot be
  accessed via the direct map and they are disallowed in GUP.

* Harden against exploited kernel flaws.  In order to access secretmem,
  a kernel-side attack would need to either walk the page tables and
  create new ones, or spawn a new privileged uiserspace process to perform
  secrets exfiltration using ptrace.

The file descriptor based memory has several advantages over the
"traditional" mm interfaces, such as mlock(), mprotect(), madvise().  File
descriptor approach allows explicit and controlled sharing of the memory
areas, it allows to seal the operations.  Besides, file descriptor based
memory paves the way for VMMs to remove the secret memory range from the
userspace hipervisor process, for instance QEMU.  Andy Lutomirski says:

  "Getting fd-backed memory into a guest will take some possibly major
  work in the kernel, but getting vma-backed memory into a guest without
  mapping it in the host user address space seems much, much worse."

memfd_secret() is made a dedicated system call rather than an extension to
memfd_create() because it's purpose is to allow the user to create more
secure memory mappings rather than to simply allow file based access to
the memory.  Nowadays a new system call cost is negligible while it is way
simpler for userspace to deal with a clear-cut system calls than with a
multiplexer or an overloaded syscall.  Moreover, the initial
implementation of memfd_secret() is completely distinct from
memfd_create() so there is no much sense in overloading memfd_create() to
begin with.  If there will be a need for code sharing between these
implementation it can be easily achieved without a need to adjust user
visible APIs.

The secret memory remains accessible in the process context using uaccess
primitives, but it is not exposed to the kernel otherwise; secret memory
areas are removed from the direct map and functions in the
follow_page()/get_user_page() family will refuse to return a page that
belongs to the secret memory area.

Once there will be a use case that will require exposing secretmem to the
kernel it will be an opt-in request in the system call flags so that user
would have to decide what data can be exposed to the kernel.

Removing of the pages from the direct map may cause its fragmentation on
architectures that use large pages to map the physical memory which
affects the system performance.  However, the original Kconfig text for
CONFIG_DIRECT_GBPAGES said that gigabyte pages in the direct map "...  can
improve the kernel's performance a tiny bit ..." (commit 00d1c5e057
("x86: add gbpages switches")) and the recent report [1] showed that "...
although 1G mappings are a good default choice, there is no compelling
evidence that it must be the only choice".  Hence, it is sufficient to
have secretmem disabled by default with the ability of a system
administrator to enable it at boot time.

Pages in the secretmem regions are unevictable and unmovable to avoid
accidental exposure of the sensitive data via swap or during page
migration.

Since the secretmem mappings are locked in memory they cannot exceed
RLIMIT_MEMLOCK.  Since these mappings are already locked independently
from mlock(), an attempt to mlock()/munlock() secretmem range would fail
and mlockall()/munlockall() will ignore secretmem mappings.

However, unlike mlock()ed memory, secretmem currently behaves more like
long-term GUP: secretmem mappings are unmovable mappings directly consumed
by user space.  With default limits, there is no excessive use of
secretmem and it poses no real problem in combination with
ZONE_MOVABLE/CMA, but in the future this should be addressed to allow
balanced use of large amounts of secretmem along with ZONE_MOVABLE/CMA.

A page that was a part of the secret memory area is cleared when it is
freed to ensure the data is not exposed to the next user of that page.

The following example demonstrates creation of a secret mapping (error
handling is omitted):

	fd = memfd_secret(0);
	ftruncate(fd, MAP_SIZE);
	ptr = mmap(NULL, MAP_SIZE, PROT_READ | PROT_WRITE,
		   MAP_SHARED, fd, 0);

[1] https://lore.kernel.org/linux-mm/213b4567-46ce-f116-9cdf-bbd0c884eb3c@linux.intel.com/

[akpm@linux-foundation.org: suppress Kconfig whine]

Link: https://lkml.kernel.org/r/20210518072034.31572-5-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Acked-by: Hagen Paul Pfeifer <hagen@jauu.net>
Acked-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Christopher Lameter <cl@linux.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Elena Reshetova <elena.reshetova@intel.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: James Bottomley <jejb@linux.ibm.com>
Cc: "Kirill A. Shutemov" <kirill@shutemov.name>
Cc: Matthew Wilcox <willy@infradead.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Palmer Dabbelt <palmer@dabbelt.com>
Cc: Palmer Dabbelt <palmerdabbelt@google.com>
Cc: Paul Walmsley <paul.walmsley@sifive.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rick Edgecombe <rick.p.edgecombe@intel.com>
Cc: Roman Gushchin <guro@fb.com>
Cc: Shakeel Butt <shakeelb@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tycho Andersen <tycho@tycho.ws>
Cc: Will Deacon <will@kernel.org>
Cc: David Hildenbrand <david@redhat.com>
Cc: kernel test robot <lkp@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2021-07-08 11:48:21 -07:00
Linus Torvalds
1423e2660c Merge tag 'x86-fpu-2021-07-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 
Pull x86 fpu updates from Thomas Gleixner:
 "Fixes and improvements for FPU handling on x86:

   - Prevent sigaltstack out of bounds writes.

     The kernel unconditionally writes the FPU state to the alternate
     stack without checking whether the stack is large enough to
     accomodate it.

     Check the alternate stack size before doing so and in case it's too
     small force a SIGSEGV instead of silently corrupting user space
     data.

   - MINSIGSTKZ and SIGSTKSZ are constants in signal.h and have never
     been updated despite the fact that the FPU state which is stored on
     the signal stack has grown over time which causes trouble in the
     field when AVX512 is available on a CPU. The kernel does not expose
     the minimum requirements for the alternate stack size depending on
     the available and enabled CPU features.

     ARM already added an aux vector AT_MINSIGSTKSZ for the same reason.
     Add it to x86 as well.

   - A major cleanup of the x86 FPU code. The recent discoveries of
     XSTATE related issues unearthed quite some inconsistencies,
     duplicated code and other issues.

     The fine granular overhaul addresses this, makes the code more
     robust and maintainable, which allows to integrate upcoming XSTATE
     related features in sane ways"

* tag 'x86-fpu-2021-07-07' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (74 commits)
  x86/fpu/xstate: Clear xstate header in copy_xstate_to_uabi_buf() again
  x86/fpu/signal: Let xrstor handle the features to init
  x86/fpu/signal: Handle #PF in the direct restore path
  x86/fpu: Return proper error codes from user access functions
  x86/fpu/signal: Split out the direct restore code
  x86/fpu/signal: Sanitize copy_user_to_fpregs_zeroing()
  x86/fpu/signal: Sanitize the xstate check on sigframe
  x86/fpu/signal: Remove the legacy alignment check
  x86/fpu/signal: Move initial checks into fpu__restore_sig()
  x86/fpu: Mark init_fpstate __ro_after_init
  x86/pkru: Remove xstate fiddling from write_pkru()
  x86/fpu: Don't store PKRU in xstate in fpu_reset_fpstate()
  x86/fpu: Remove PKRU handling from switch_fpu_finish()
  x86/fpu: Mask PKRU from kernel XRSTOR[S] operations
  x86/fpu: Hook up PKRU into ptrace()
  x86/fpu: Add PKRU storage outside of task XSAVE buffer
  x86/fpu: Dont restore PKRU in fpregs_restore_userspace()
  x86/fpu: Rename xfeatures_mask_user() to xfeatures_mask_uabi()
  x86/fpu: Move FXSAVE_LEAK quirk info __copy_kernel_to_fpregs()
  x86/fpu: Rename __fpregs_load_activate() to fpregs_restore_userregs()
  ...
 2021-07-07 11:12:01 -07:00
Linus Torvalds
8e4f3e1517 Merge tag 'fuse-update-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse 
Pull fuse updates from Miklos Szeredi:

 - Fixes for virtiofs submounts

 - Misc fixes and cleanups

* tag 'fuse-update-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse:
  virtiofs: Fix spelling mistakes
  fuse: use DIV_ROUND_UP helper macro for calculations
  fuse: fix illegal access to inode with reused nodeid
  fuse: allow fallocate(FALLOC_FL_ZERO_RANGE)
  fuse: Make fuse_fill_super_submount() static
  fuse: Switch to fc_mount() for submounts
  fuse: Call vfs_get_tree() for submounts
  fuse: add dedicated filesystem context ops for submounts
  virtiofs: propagate sync() to file server
  fuse: reject internal errno
  fuse: check connected before queueing on fpq->io
  fuse: ignore PG_workingset after stealing
  fuse: Fix infinite loop in sget_fc()
  fuse: Fix crash if superblock of submount gets killed early
  fuse: Fix crash in fuse_dentry_automount() error path
 2021-07-06 11:17:41 -07:00
Krzysztof Wilczyński
347269c113 PCI: Fix kernel-doc formatting 
Fix kernel-doc formatting throughout drivers/pci and related include files.
No change to functionality intended.

Check for warnings:

  $ find include drivers/pci -type f -path "*pci*.[ch]" | xargs scripts/kernel-doc -none

[bhelgaas: squashed to one commit]
Link: https://lore.kernel.org/r/20210509030237.368540-1-kw@linux.com
Link: https://lore.kernel.org/r/20210703151306.1922450-1-kw@linux.com
Link: https://lore.kernel.org/r/20210703151306.1922450-2-kw@linux.com
Link: https://lore.kernel.org/r/20210703151306.1922450-3-kw@linux.com
Link: https://lore.kernel.org/r/20210703151306.1922450-4-kw@linux.com
Link: https://lore.kernel.org/r/20210703151306.1922450-5-kw@linux.com
Signed-off-by: Krzysztof Wilczyński <kw@linux.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
 2021-07-06 10:37:46 -05:00
Linus Torvalds
c932ed0adb Merge tag 'tty-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty 
Pull tty / serial updates from Greg KH:
 "Here is the big set of tty and serial driver patches for 5.14-rc1.

  A bit more than normal, but nothing major, lots of cleanups.
  Highlights are:

   - lots of tty api cleanups and mxser driver cleanups from Jiri

   - build warning fixes

   - various serial driver updates

   - coding style cleanups

   - various tty driver minor fixes and updates

   - removal of broken and disable r3964 line discipline (finally!)

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'tty-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (227 commits)
  serial: mvebu-uart: remove unused member nb from struct mvebu_uart
  arm64: dts: marvell: armada-37xx: Fix reg for standard variant of UART
  dt-bindings: mvebu-uart: fix documentation
  serial: mvebu-uart: correctly calculate minimal possible baudrate
  serial: mvebu-uart: do not allow changing baudrate when uartclk is not available
  serial: mvebu-uart: fix calculation of clock divisor
  tty: make linux/tty_flip.h self-contained
  serial: Prefer unsigned int to bare use of unsigned
  serial: 8250: 8250_omap: Fix possible interrupt storm on K3 SoCs
  serial: qcom_geni_serial: use DT aliases according to DT bindings
  Revert "tty: serial: Add UART driver for Cortina-Access platform"
  tty: serial: Add UART driver for Cortina-Access platform
  MAINTAINERS: add me back as mxser maintainer
  mxser: Documentation, fix typos
  mxser: Documentation, make the docs up-to-date
  mxser: Documentation, remove traces of callout device
  mxser: introduce mxser_16550A_or_MUST helper
  mxser: rename flags to old_speed in mxser_set_serial_info
  mxser: use port variable in mxser_set_serial_info
  mxser: access info->MCR under info->slock
  ...
 2021-07-05 14:08:24 -07:00
Linus Torvalds
eed0218e8c Merge tag 'char-misc-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc 
Pull char / misc driver updates from Greg KH:
 "Here is the big set of char / misc and other driver subsystem updates
  for 5.14-rc1. Included in here are:

   - habanalabs driver updates

   - fsl-mc driver updates

   - comedi driver updates

   - fpga driver updates

   - extcon driver updates

   - interconnect driver updates

   - mei driver updates

   - nvmem driver updates

   - phy driver updates

   - pnp driver updates

   - soundwire driver updates

   - lots of other tiny driver updates for char and misc drivers

  This is looking more and more like the "various driver subsystems
  mushed together" tree...

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'char-misc-5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc: (292 commits)
  mcb: Use DEFINE_RES_MEM() helper macro and fix the end address
  PNP: moved EXPORT_SYMBOL so that it immediately followed its function/variable
  bus: mhi: pci-generic: Add missing 'pci_disable_pcie_error_reporting()' calls
  bus: mhi: Wait for M2 state during system resume
  bus: mhi: core: Fix power down latency
  intel_th: Wait until port is in reset before programming it
  intel_th: msu: Make contiguous buffers uncached
  intel_th: Remove an unused exit point from intel_th_remove()
  stm class: Spelling fix
  nitro_enclaves: Set Bus Master for the NE PCI device
  misc: ibmasm: Modify matricies to matrices
  misc: vmw_vmci: return the correct errno code
  siox: Simplify error handling via dev_err_probe()
  fpga: machxo2-spi: Address warning about unused variable
  lkdtm/heap: Add init_on_alloc tests
  selftests/lkdtm: Enable various testable CONFIGs
  lkdtm: Add CONFIG hints in errors where possible
  lkdtm: Enable DOUBLE_FAULT on all architectures
  lkdtm/heap: Add vmalloc linear overflow test
  lkdtm/bugs: XFAIL UNALIGNED_LOAD_STORE_WRITE
  ...
 2021-07-05 13:42:16 -07:00
Linus Torvalds
0c66a95c7e Merge tag 'cxl-for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl 
Pull CXL (Compute Express Link) updates from Dan Williams:
 "This subsystem is still in the build-out phase as the bulk of the
  update is improvements to enumeration and fleshing out the device
  model. In terms of new features, more mailbox commands have been added
  to the allowed-list in support of persistent memory provisioning
  support targeting v5.15.

  The critical update from an enumeration perspective is support for the
  CXL Fixed Memory Window Structure that indicates to Linux which system
  physical address ranges decode to the CXL Host Bridges in the system.
  This allows the driver to detect which address ranges have been mapped
  by firmware and what address ranges are available for future hotplug.

  So, again, mostly skeleton this round, with more meat targeting v5.15.

  Summary:

   - Add support for the CXL Fixed Memory Window Structure, a recent
     extension of the ACPI CEDT (CXL Early Discovery Table)

   - Add infrastructure for component registers

   - Add HDM (Host-managed device memory) decoder definitions

   - Define a device model for an HDM decoder tree

   - Bridge CXL persistent memory capabilities to an NVDIMM bus /
     device-model

   - Switch to fine grained mapping of CXL MMIO registers to allow
     different drivers / system software to own individual register
     blocks

   - Enable media provisioning commands, and publish the label storage
     area size in sysfs

   - Miscellaneous cleanups and fixes"

* tag 'cxl-for-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/cxl/cxl: (34 commits)
  cxl/pci: Rename CXL REGLOC ID
  cxl/acpi: Use the ACPI CFMWS to create static decoder objects
  cxl/acpi: Add the Host Bridge base address to CXL port objects
  cxl/pmem: Register 'pmem' / cxl_nvdimm devices
  libnvdimm: Drop unused device power management support
  libnvdimm: Export nvdimm shutdown helper, nvdimm_delete()
  cxl/pmem: Add initial infrastructure for pmem support
  cxl/core: Add cxl-bus driver infrastructure
  cxl/pci: Add media provisioning required commands
  cxl/component_regs: Fix offset
  cxl/hdm: Fix decoder count calculation
  cxl/acpi: Introduce cxl_decoder objects
  cxl/acpi: Enumerate host bridge root ports
  cxl/acpi: Add downstream port data to cxl_port instances
  cxl/Kconfig: Default drivers to CONFIG_CXL_BUS
  cxl/acpi: Introduce the root of a cxl_port topology
  cxl/pci: Fixup devm_cxl_iomap_block() to take a 'struct device *'
  cxl/pci: Add HDM decoder capabilities
  cxl/pci: Reserve individual register block regions
  cxl/pci: Map registers based on capabilities
  ...
 2021-07-04 11:55:13 -07:00
Zhu Lingshan
d61914ea6a virtio: update virtio id table, add transitional ids 
This commit updates virtio id table by adding transitional device
ids

Signed-off-by: Zhu Lingshan <lingshan.zhu@intel.com>
Link: https://lore.kernel.org/r/20210510081015.4212-2-lingshan.zhu@intel.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
 2021-07-03 04:50:51 -04:00
Linus Torvalds
71bd934101 Merge branch 'akpm' (patches from Andrew) 
Merge more updates from Andrew Morton:
 "190 patches.

  Subsystems affected by this patch series: mm (hugetlb, userfaultfd,
  vmscan, kconfig, proc, z3fold, zbud, ras, mempolicy, memblock,
  migration, thp, nommu, kconfig, madvise, memory-hotplug, zswap,
  zsmalloc, zram, cleanups, kfence, and hmm), procfs, sysctl, misc,
  core-kernel, lib, lz4, checkpatch, init, kprobes, nilfs2, hfs,
  signals, exec, kcov, selftests, compress/decompress, and ipc"

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (190 commits)
  ipc/util.c: use binary search for max_idx
  ipc/sem.c: use READ_ONCE()/WRITE_ONCE() for use_global_lock
  ipc: use kmalloc for msg_queue and shmid_kernel
  ipc sem: use kvmalloc for sem_undo allocation
  lib/decompressors: remove set but not used variabled 'level'
  selftests/vm/pkeys: exercise x86 XSAVE init state
  selftests/vm/pkeys: refill shadow register after implicit kernel write
  selftests/vm/pkeys: handle negative sys_pkey_alloc() return code
  selftests/vm/pkeys: fix alloc_random_pkey() to make it really, really random
  kcov: add __no_sanitize_coverage to fix noinstr for all architectures
  exec: remove checks in __register_bimfmt()
  x86: signal: don't do sas_ss_reset() until we are certain that sigframe won't be abandoned
  hfsplus: report create_date to kstat.btime
  hfsplus: remove unnecessary oom message
  nilfs2: remove redundant continue statement in a while-loop
  kprobes: remove duplicated strong free_insn_page in x86 and s390
  init: print out unknown kernel parameters
  checkpatch: do not complain about positive return values starting with EPOLL
  checkpatch: improve the indented label test
  checkpatch: scripts/spdxcheck.py now requires python3
  ...
 2021-07-02 12:08:10 -07:00
Linus Torvalds
e058a84bfd Merge tag 'drm-next-2021-07-01' of git://anongit.freedesktop.org/drm/drm 
Pull drm updates from Dave Airlie:
 "Highlights:

   - AMD enables two more GPUs, with resulting header files

   - i915 has started to move to TTM for discrete GPU and enable DG1
     discrete GPU support (not by default yet)

   - new HyperV drm driver

   - vmwgfx adds arm64 support

   - TTM refactoring ongoing

   - 16bpc display support for AMD hw

  Otherwise it's just the usual insane amounts of work all over the
  place in lots of drivers and the core, as mostly summarised below:

  Core:
   - mark AGP ioctls as legacy
   - disable force probing for non-master clients
   - HDR metadata property helpers
   - HDMI infoframe signal colorimetry support
   - remove drm_device.pdev pointer
   - remove DRM_KMS_FB_HELPER config option
   - remove drm_pci_alloc/free
   - drm_err_*/drm_dbg_* helpers
   - use drm driver names for fbdev
   - leaked DMA handle fix
   - 16bpc fixed point format fourcc
   - add prefetching memcpy for WC
   - Documentation fixes

  aperture:
   - add aperture ownership helpers

  dp:
   - aux fixes
   - downstream 0 port handling
   - use extended base receiver capability DPCD
   - Rename DP_PSR_SELECTIVE_UPDATE to better mach eDP spec
   - mst: use khz as link rate during init
   - VCPI fixes for StarTech hub

  ttm:
   - provide tt_shrink file via debugfs
   - warn about freeing pinned BOs
   - fix swapping error handling
   - move page alignment into BO
   - cleanup ttm_agp_backend
   - add ttm_sys_manager
   - don't override vm_ops
   - ttm_bo_mmap removed
   - make ttm_resource base of all managers
   - remove VM_MIXEDMAP usage

  panel:
   - sysfs_emit support
   - simple: runtime PM support
   - simple: power up panel when reading EDID + caching

  bridge:
   - MHDP8546: HDCP support + DT bindings
   - MHDP8546: Register DP AUX channel with userspace
   - TI SN65DSI83 + SN65DSI84: add driver
   - Sil8620: Fix module dependencies
   - dw-hdmi: make CEC driver loading optional
   - Ti-sn65dsi86: refclk fixes, subdrivers, runtime pm
   - It66121: Add driver + DT bindings
   - Adv7511: Support I2S IEC958 encoding
   - Anx7625: fix power-on delay
   - Nwi-dsi: Modesetting fixes; Cleanups
   - lt6911: add missing MODULE_DEVICE_TABLE
   - cdns: fix PM reference leak

  hyperv:
   - add new DRM driver for HyperV graphics

  efifb:
   - non-PCI device handling fixes

  i915:
   - refactor IP/device versioning
   - XeLPD Display IP preperation work
   - ADL-P enablement patches
   - DG1 uAPI behind BROKEN
   - disable mmap ioctl for discerte GPUs
   - start enabling HuC loading for Gen12+
   - major GuC backend rework for new platforms
   - initial TTM support for Discrete GPUs
   - locking rework for TTM prep
   - use correct max source link rate for eDP
   - %p4cc format printing
   - GLK display fixes
   - VLV DSI panel power fixes
   - PSR2 disabled for RKL and ADL-S
   - ACPI _DSM invalid access fixed
   - DMC FW path abstraction
   - ADL-S PCI ID update
   - uAPI headers converted to kerneldoc
   - initial LMEM support for DG1
   - x86/gpu: add Jasperlake to gen11 early quirks

  amdgpu:
   - Aldebaran updates + initial SR-IOV
   - new GPU: Beige Goby and Yellow Carp support
   - more LTTPR display work
   - Vangogh updates
   - SDMA 5.x GCR fixes
   - PCIe ASPM support
   - Renoir TMZ enablement
   - initial multiple eDP panel support
   - use fdinfo to track devices/process info
   - pin/unpin TTM fixes
   - free resource on fence usage query
   - fix fence calculation
   - fix hotunplug/suspend issues
   - GC/MM register access macro cleanup for SR-IOV
   - W=1 fixes
   - ACPI ATCS/ATIF handling rework
   - 16bpc fixed point format support
   - Initial smartshift support
   - RV/PCO power tuning fixes
   - new INFO query for additional vbios info

  amdkfd:
   - SR-IOV aldebaran support
   - HMM SVM support

  radeon:
   - SMU regression fixes
   - Oland flickering fix

  vmwgfx:
   - enable console with fbdev emulation
   - fix cpu updates of coherent multisample surfaces
   - remove reservation semaphore
   - add initial SVGA3 support
   - support arm64

  msm:
   - devcoredump support for display errors
   - dpu/dsi: yaml bindings conversion
   - mdp5: alpha/blend_mode/zpos support
   - a6xx: cached coherent buffer support
   - gpu iova fault improvement
   - a660 support

  rockchip:
   - RK3036 win1 scaling support
   - RK3066/3188 missing register support
   - RK3036/3066/3126/3188 alpha support

  mediatek:
   - MT8167 HDMI support
   - MT8183 DPI dual edge support

  tegra:
   - fixed YUV support/scaling on Tegra186+

  ast:
   - use pcim_iomap
   - fix DP501 EDID

  bochs:
   - screen blanking support

  etnaviv:
   - export more GPU ID values to userspace
   - add HWDB entry for GPU on i.MX8MP
   - rework linear window calcs

  exynos:
   - pm runtime changes

  imx:
   - Annotate dma_fence critical section
   - fix PRG modifiers after drmm conversion
   - Add 8 pixel alignment fix for 1366x768
   - fix YUV advertising
   - add color properties

  ingenic:
   - IPU planes fix

  panfrost:
   - Mediatek MT8183 support + DT bindings
   - export AFBC_FEATURES register to userspace

  simpledrm:
   - %pr for printing resources

  nouveau:
   - pin/unpin TTM fixes

  qxl:
   - unpin shadow BO

  virtio:
   - create dumb BOs as guest blob

  vkms:
   - drmm_universal_plane_alloc
   - add XRGB plane composition
   - overlay support"

* tag 'drm-next-2021-07-01' of git://anongit.freedesktop.org/drm/drm: (1570 commits)
  drm/i915: Reinstate the mmap ioctl for some platforms
  drm/i915/dsc: abstract helpers to get bigjoiner primary/secondary crtc
  Revert "drm/msm/mdp5: provide dynamic bandwidth management"
  drm/msm/mdp5: provide dynamic bandwidth management
  drm/msm/mdp5: add perf blocks for holding fudge factors
  drm/msm/mdp5: switch to standard zpos property
  drm/msm/mdp5: add support for alpha/blend_mode properties
  drm/msm/mdp5: use drm_plane_state for pixel blend mode
  drm/msm/mdp5: use drm_plane_state for storing alpha value
  drm/msm/mdp5: use drm atomic helpers to handle base drm plane state
  drm/msm/dsi: do not enable PHYs when called for the slave DSI interface
  drm/msm: Add debugfs to trigger shrinker
  drm/msm/dpu: Avoid ABBA deadlock between IRQ modules
  drm/msm: devcoredump iommu fault support
  iommu/arm-smmu-qcom: Add stall support
  drm/msm: Improve the a6xx page fault handler
  iommu/arm-smmu-qcom: Add an adreno-smmu-priv callback to get pagefault info
  iommu/arm-smmu: Add support for driver IOMMU fault handlers
  drm/msm: export hangcheck_period in debugfs
  drm/msm/a6xx: add support for Adreno 660 GPU
  ...
 2021-07-01 12:53:43 -07:00
Linus Torvalds
c288d9cd71 Merge tag 'for-5.14/io_uring-2021-06-30' of git://git.kernel.dk/linux-block 
Pull io_uring updates from Jens Axboe:

 - Multi-queue iopoll improvement (Fam)

 - Allow configurable io-wq CPU masks (me)

 - renameat/linkat tightening (me)

 - poll re-arm improvement (Olivier)

 - SQPOLL race fix (Olivier)

 - Cancelation unification (Pavel)

 - SQPOLL cleanups (Pavel)

 - Enable file backed buffers for shmem/memfd (Pavel)

 - A ton of cleanups and performance improvements (Pavel)

 - Followup and misc fixes (Colin, Fam, Hao, Olivier)

* tag 'for-5.14/io_uring-2021-06-30' of git://git.kernel.dk/linux-block: (83 commits)
  io_uring: code clean for kiocb_done()
  io_uring: spin in iopoll() only when reqs are in a single queue
  io_uring: pre-initialise some of req fields
  io_uring: refactor io_submit_flush_completions
  io_uring: optimise hot path restricted checks
  io_uring: remove not needed PF_EXITING check
  io_uring: mainstream sqpoll task_work running
  io_uring: refactor io_arm_poll_handler()
  io_uring: reduce latency by reissueing the operation
  io_uring: add IOPOLL and reserved field checks to IORING_OP_UNLINKAT
  io_uring: add IOPOLL and reserved field checks to IORING_OP_RENAMEAT
  io_uring: refactor io_openat2()
  io_uring: simplify struct io_uring_sqe layout
  io_uring: update sqe layout build checks
  io_uring: fix code style problems
  io_uring: refactor io_sq_thread()
  io_uring: don't change sqpoll creds if not needed
  io_uring: Create define to modify a SQPOLL parameter
  io_uring: Fix race condition when sqp thread goes to sleep
  io_uring: improve in tctx_task_work() resubmission
  ...
 2021-07-01 12:16:24 -07:00
Feng Tang
7858d7bca7 mm/mempolicy: don't handle MPOL_LOCAL like a fake MPOL_PREFERRED policy 
MPOL_LOCAL policy has been setup as a real policy, but it is still handled
like a faked POL_PREFERRED policy with one internal MPOL_F_LOCAL flag bit
set, and there are many places having to judge the real 'prefer' or the
'local' policy, which are quite confusing.

In current code, there are 4 cases that MPOL_LOCAL are used:

1. user specifies 'local' policy

2. user specifies 'prefer' policy, but with empty nodemask

3. system 'default' policy is used

4. 'prefer' policy + valid 'preferred' node with MPOL_F_STATIC_NODES
   flag set, and when it is 'rebind' to a nodemask which doesn't contains
   the 'preferred' node, it will perform as 'local' policy

So make 'local' a real policy instead of a fake 'prefer' one, and kill
MPOL_F_LOCAL bit, which can greatly reduce the confusion for code reading.

For case 4, the logic of mpol_rebind_preferred() is confusing, as Michal
Hocko pointed out:

: I do believe that rebinding preferred policy is just bogus and it should
: be dropped altogether on the ground that a preference is a mere hint from
: userspace where to start the allocation.  Unless I am missing something
: cpusets will be always authoritative for the final placement.  The
: preferred node just acts as a starting point and it should be really
: preserved when cpusets changes.  Otherwise we have a very subtle behavior
: corner cases.

So dump all the tricky transformation between 'prefer' and 'local', and
just record the new nodemask of rebinding.

[feng.tang@intel.com: fix a problem in mpol_set_nodemask(), per Michal Hocko]
  Link: https://lkml.kernel.org/r/1622560492-1294-3-git-send-email-feng.tang@intel.com
[feng.tang@intel.com: refine code and comments of mpol_set_nodemask(), per Michal]
  Link: https://lkml.kernel.org/r/20210603081807.GE56979@shbuild999.sh.intel.com

Link: https://lkml.kernel.org/r/1622469956-82897-3-git-send-email-feng.tang@intel.com
Signed-off-by: Feng Tang <feng.tang@intel.com>
Suggested-by: Michal Hocko <mhocko@suse.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Ben Widawsky <ben.widawsky@intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2021-06-30 20:47:29 -07:00
Axel Rasmussen
964ab0040f userfaultfd/shmem: advertise shmem minor fault support 
Now that the feature is fully implemented (the faulting path hooks exist
so userspace is notified, and the ioctl to resolve such faults is
available), advertise this as a supported feature.

Link: https://lkml.kernel.org/r/20210503180737.2487560-6-axelrasmussen@google.com
Signed-off-by: Axel Rasmussen <axelrasmussen@google.com>
Acked-by: Hugh Dickins <hughd@google.com>
Acked-by: Peter Xu <peterx@redhat.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Brian Geffon <bgeffon@google.com>
Cc: "Dr . David Alan Gilbert" <dgilbert@redhat.com>
Cc: Jerome Glisse <jglisse@redhat.com>
Cc: Joe Perches <joe@perches.com>
Cc: Kirill A. Shutemov <kirill@shutemov.name>
Cc: Lokesh Gidra <lokeshgidra@google.com>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Mike Rapoport <rppt@linux.vnet.ibm.com>
Cc: Mina Almasry <almasrymina@google.com>
Cc: Oliver Upton <oupton@google.com>
Cc: Shaohua Li <shli@fb.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Wang Qing <wangqing@vivo.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
 2021-06-30 20:47:27 -07:00
Linus Torvalds
dbe69e4337 Merge tag 'net-next-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 
Pull networking updates from Jakub Kicinski:
 "Core:

   - BPF:
      - add syscall program type and libbpf support for generating
        instructions and bindings for in-kernel BPF loaders (BPF loaders
        for BPF), this is a stepping stone for signed BPF programs
      - infrastructure to migrate TCP child sockets from one listener to
        another in the same reuseport group/map to improve flexibility
        of service hand-off/restart
      - add broadcast support to XDP redirect

   - allow bypass of the lockless qdisc to improving performance (for
     pktgen: +23% with one thread, +44% with 2 threads)

   - add a simpler version of "DO_ONCE()" which does not require jump
     labels, intended for slow-path usage

   - virtio/vsock: introduce SOCK_SEQPACKET support

   - add getsocketopt to retrieve netns cookie

   - ip: treat lowest address of a IPv4 subnet as ordinary unicast
     address allowing reclaiming of precious IPv4 addresses

   - ipv6: use prandom_u32() for ID generation

   - ip: add support for more flexible field selection for hashing
     across multi-path routes (w/ offload to mlxsw)

   - icmp: add support for extended RFC 8335 PROBE (ping)

   - seg6: add support for SRv6 End.DT46 behavior

   - mptcp:
      - DSS checksum support (RFC 8684) to detect middlebox meddling
      - support Connection-time 'C' flag
      - time stamping support

   - sctp: packetization Layer Path MTU Discovery (RFC 8899)

   - xfrm: speed up state addition with seq set

   - WiFi:
      - hidden AP discovery on 6 GHz and other HE 6 GHz improvements
      - aggregation handling improvements for some drivers
      - minstrel improvements for no-ack frames
      - deferred rate control for TXQs to improve reaction times
      - switch from round robin to virtual time-based airtime scheduler

   - add trace points:
      - tcp checksum errors
      - openvswitch - action execution, upcalls
      - socket errors via sk_error_report

  Device APIs:

   - devlink: add rate API for hierarchical control of max egress rate
     of virtual devices (VFs, SFs etc.)

   - don't require RCU read lock to be held around BPF hooks in NAPI
     context

   - page_pool: generic buffer recycling

  New hardware/drivers:

   - mobile:
      - iosm: PCIe Driver for Intel M.2 Modem
      - support for Qualcomm MSM8998 (ipa)

   - WiFi: Qualcomm QCN9074 and WCN6855 PCI devices

   - sparx5: Microchip SparX-5 family of Enterprise Ethernet switches

   - Mellanox BlueField Gigabit Ethernet (control NIC of the DPU)

   - NXP SJA1110 Automotive Ethernet 10-port switch

   - Qualcomm QCA8327 switch support (qca8k)

   - Mikrotik 10/25G NIC (atl1c)

  Driver changes:

   - ACPI support for some MDIO, MAC and PHY devices from Marvell and
     NXP (our first foray into MAC/PHY description via ACPI)

   - HW timestamping (PTP) support: bnxt_en, ice, sja1105, hns3, tja11xx

   - Mellanox/Nvidia NIC (mlx5)
      - NIC VF offload of L2 bridging
      - support IRQ distribution to Sub-functions

   - Marvell (prestera):
      - add flower and match all
      - devlink trap
      - link aggregation

   - Netronome (nfp): connection tracking offload

   - Intel 1GE (igc): add AF_XDP support

   - Marvell DPU (octeontx2): ingress ratelimit offload

   - Google vNIC (gve): new ring/descriptor format support

   - Qualcomm mobile (rmnet & ipa): inline checksum offload support

   - MediaTek WiFi (mt76)
      - mt7915 MSI support
      - mt7915 Tx status reporting
      - mt7915 thermal sensors support
      - mt7921 decapsulation offload
      - mt7921 enable runtime pm and deep sleep

   - Realtek WiFi (rtw88)
      - beacon filter support
      - Tx antenna path diversity support
      - firmware crash information via devcoredump

   - Qualcomm WiFi (wcn36xx)
      - Wake-on-WLAN support with magic packets and GTK rekeying

   - Micrel PHY (ksz886x/ksz8081): add cable test support"

* tag 'net-next-5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2168 commits)
  tcp: change ICSK_CA_PRIV_SIZE definition
  tcp_yeah: check struct yeah size at compile time
  gve: DQO: Fix off by one in gve_rx_dqo()
  stmmac: intel: set PCI_D3hot in suspend
  stmmac: intel: Enable PHY WOL option in EHL
  net: stmmac: option to enable PHY WOL with PMT enabled
  net: say "local" instead of "static" addresses in ndo_dflt_fdb_{add,del}
  net: use netdev_info in ndo_dflt_fdb_{add,del}
  ptp: Set lookup cookie when creating a PTP PPS source.
  net: sock: add trace for socket errors
  net: sock: introduce sk_error_report
  net: dsa: replay the local bridge FDB entries pointing to the bridge dev too
  net: dsa: ensure during dsa_fdb_offload_notify that dev_hold and dev_put are on the same dev
  net: dsa: include fdb entries pointing to bridge in the host fdb list
  net: dsa: include bridge addresses which are local in the host fdb list
  net: dsa: sync static FDB entries on foreign interfaces to hardware
  net: dsa: install the host MDB and FDB entries in the master's RX filter
  net: dsa: reference count the FDB addresses at the cross-chip notifier level
  net: dsa: introduce a separate cross-chip notifier type for host FDBs
  net: dsa: reference count the MDB entries at the cross-chip notifier level
  ...
 2021-06-30 15:51:09 -07:00
Linus Torvalds
290fe0fa6f Merge tag 'audit-pr-20210629' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit 
Pull audit updates from Paul Moore:
 "Another merge window, another small audit pull request.

  Four patches in total: one is cosmetic, one removes an unnecessary
  initialization, one renames some enum values to prevent name
  collisions, and one converts list_del()/list_add() to list_move().

  None of these are earth shattering and all pass the audit-testsuite
  tests while merging cleanly on top of your tree from earlier today"

* tag 'audit-pr-20210629' of git://git.kernel.org/pub/scm/linux/kernel/git/pcmoore/audit:
  audit: remove unnecessary 'ret' initialization
  audit: remove trailing spaces and tabs
  audit: Use list_move instead of list_del/list_add
  audit: Rename enum audit_state constants to avoid AUDIT_DISABLED redefinition
  audit: add blank line after variable declarations
 2021-06-30 15:22:05 -07:00
Prasanna Kumar Kalever
6497ef8df5 nbd: provide a way for userspace processes to identify device backends 
Problem:
On reconfigure of device, there is no way to defend if the backend
storage is matching with the initial backend storage.

Say, if an initial connect request for backend "pool1/image1" got
mapped to /dev/nbd0 and the userspace process is terminated. A next
reconfigure request within NBD_ATTR_DEAD_CONN_TIMEOUT is allowed to
use /dev/nbd0 for a different backend "pool1/image2"

For example, an operation like below could be dangerous:

$ sudo rbd-nbd map --try-netlink rbd-pool/ext4-image
/dev/nbd0
$ sudo blkid /dev/nbd0
/dev/nbd0: UUID="bfc444b4-64b1-418f-8b36-6e0d170cfc04" TYPE="ext4"
$ sudo pkill -9 rbd-nbd
$ sudo rbd-nbd attach --try-netlink --device /dev/nbd0 rbd-pool/xfs-image
/dev/nbd0
$ sudo blkid /dev/nbd0
/dev/nbd0: UUID="d29bf343-6570-4069-a9ea-2fa156ced908" TYPE="xfs"

Solution:
Provide a way for userspace processes to keep some metadata to identify
between the device and the backend, so that when a reconfigure request is
made, we can compare and avoid such dangerous operations.

With this solution, as part of the initial connect request, backend
path can be stored in the sysfs per device config, so that on a reconfigure
request it's easy to check if the backend path matches with the initial
connect backend path.

Please note, ioctl interface to nbd will not have these changes, as there
won't be any reconfigure.

Signed-off-by: Prasanna Kumar Kalever <prasanna.kalever@redhat.com>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Ming Lei <ming.lei@redhat.com>
Link: https://lore.kernel.org/r/20210429102828.31248-1-prasanna.kalever@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2021-06-30 15:34:04 -06:00
Pavel Begunkov
9ba6a1c062 io_uring: simplify struct io_uring_sqe layout 
Flatten struct io_uring_sqe, the last union is exactly 64B, so move them
out of union { struct { ... }}, and decrease __pad2 size.

Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/2e21ef7aed136293d654450bc3088973a8adc730.1624543113.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
 2021-06-30 14:15:39 -06:00
Linus Torvalds
776ba3ad65 Merge tag 'platform-drivers-x86-v5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86 
Pull x86 platform driver updates from Hans de Goede:
 "Highlights:

   - New think-lmi driver adding support for changing Lenovo Thinkpad
     BIOS settings from within Linux using the standard firmware-
     attributes class sysfs API

   - MS Surface aggregator-cdev now also supports forwarding events to
     user-space (for debugging / new driver development purposes only)

   - New intel_skl_int3472 driver this provides the necessary glue to
     translate ACPI table information to GPIOs, regulators, etc. for
     camera sensors on Intel devices with IPU3 attached MIPI cameras

   - A whole bunch of other fixes + device-specific quirk additions

   - New devm_work_autocancel() devm-helpers.h function"

* tag 'platform-drivers-x86-v5.14-1' of git://git.kernel.org/pub/scm/linux/kernel/git/pdx86/platform-drivers-x86: (83 commits)
  platform/x86: dell-wmi-sysman: Change user experience when Admin/System Password is modified
  platform/x86: intel_skl_int3472: Uninitialized variable in skl_int3472_handle_gpio_resources()
  platform/x86: think-lmi: Move kfree(setting->possible_values) to tlmi_attr_setting_release()
  platform/x86: think-lmi: Split current_value to reflect only the value
  platform/x86: think-lmi: Fix issues with duplicate attributes
  platform/x86: think-lmi: Return EINVAL when kbdlang gets set to a 0 length string
  platform/x86: intel_cht_int33fe: Move to its own subfolder
  platform/x86: intel_skl_int3472: Move to intel/ subfolder
  platform/x86: intel_skl_int3472: Provide skl_int3472_unregister_clock()
  platform/x86: intel_skl_int3472: Provide skl_int3472_unregister_regulator()
  platform/x86: intel_skl_int3472: Use ACPI GPIO resource directly
  platform/x86: intel_skl_int3472: Fix dependencies (drop CLKDEV_LOOKUP)
  platform/x86: intel_skl_int3472: Free ACPI device resources after use
  platform/x86: Remove "default n" entries
  platform/x86: ISST: Use numa node id for cpu pci dev mapping
  platform/x86: ISST: Optimize CPU to PCI device mapping
  tools/power/x86/intel-speed-select: v1.10 release
  tools/power/x86/intel-speed-select: Fix uncore memory frequency display
  extcon: extcon-max8997: Simplify driver using devm
  extcon: extcon-max8997: Fix IRQ freeing at error path
  ...
 2021-06-30 11:15:39 -07:00
Linus Torvalds
30d1a556a9 Merge tag 'fs.mount_setattr.nosymfollow.v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux 
Pull mount_setattr updates from Christian Brauner:
 "A few releases ago the old mount API gained support for a mount
  options which prevents following symlinks on a given mount. This adds
  support for it in the new mount api through the MOUNT_ATTR_NOSYMFOLLOW
  flag via mount_setattr() and fsmount(). With mount_setattr() that flag
  can even be applied recursively.

  There's an additional ack from Ross Zwisler who originally authored
  the nosymfollow patch. As I've already had the patches in my for-next
  I didn't add his ack explicitly"

* tag 'fs.mount_setattr.nosymfollow.v5.14' of git://git.kernel.org/pub/scm/linux/kernel/git/brauner/linux:
  tests: test MOUNT_ATTR_NOSYMFOLLOW with mount_setattr()
  mount: Support "nosymfollow" in new mount api
 2021-06-29 20:07:06 -07:00
Linus Torvalds
616ea5cc4a Merge tag 'seccomp-v5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux 
Pull seccomp updates from Kees Cook:

 - Add "atomic addfd + send reply" mode to SECCOMP_USER_NOTIF to better
   handle EINTR races visible to seccomp monitors. (Rodrigo Campos,
   Sargun Dhillon)

 - Improve seccomp selftests for readability in CI systems. (Kees Cook)

* tag 'seccomp-v5.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/kees/linux:
  selftests/seccomp: Avoid using "sysctl" for report
  selftests/seccomp: Flush benchmark output
  selftests/seccomp: More closely track fds being assigned
  selftests/seccomp: Add test for atomic addfd+send
  seccomp: Support atomic "addfd + send reply"
 2021-06-28 19:49:37 -07:00