Linus Torvalds
643ad15d47
Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip ...
Pull x86 protection key support from Ingo Molnar:
"This tree adds support for a new memory protection hardware feature
that is available in upcoming Intel CPUs: 'protection keys' (pkeys).
There's a background article at LWN.net:
https://lwn.net/Articles/643797/
The gist is that protection keys allow the encoding of
user-controllable permission masks in the pte. So instead of having a
fixed protection mask in the pte (which needs a system call to change
and works on a per page basis), the user can map a (handful of)
protection mask variants and can change the masks runtime relatively
cheaply, without having to change every single page in the affected
virtual memory range.
This allows the dynamic switching of the protection bits of large
amounts of virtual memory, via user-space instructions. It also
allows more precise control of MMU permission bits: for example the
executable bit is separate from the read bit (see more about that
below).
This tree adds the MM infrastructure and low level x86 glue needed for
that, plus it adds a high level API to make use of protection keys -
if a user-space application calls:
mmap(..., PROT_EXEC);
or
mprotect(ptr, sz, PROT_EXEC);
(note PROT_EXEC-only, without PROT_READ/WRITE), the kernel will notice
this special case, and will set a special protection key on this
memory range. It also sets the appropriate bits in the Protection
Keys User Rights (PKRU) register so that the memory becomes unreadable
and unwritable.
So using protection keys the kernel is able to implement 'true'
PROT_EXEC on x86 CPUs: without protection keys PROT_EXEC implies
PROT_READ as well. Unreadable executable mappings have security
advantages: they cannot be read via information leaks to figure out
ASLR details, nor can they be scanned for ROP gadgets - and they
cannot be used by exploits for data purposes either.
We know about no user-space code that relies on pure PROT_EXEC
mappings today, but binary loaders could start making use of this new
feature to map binaries and libraries in a more secure fashion.
There is other pending pkeys work that offers more high level system
call APIs to manage protection keys - but those are not part of this
pull request.
Right now there's a Kconfig that controls this feature
(CONFIG_X86_INTEL_MEMORY_PROTECTION_KEYS) that is default enabled
(like most x86 CPU feature enablement code that has no runtime
overhead), but it's not user-configurable at the moment. If there's
any serious problem with this then we can make it configurable and/or
flip the default"
* 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (38 commits)
x86/mm/pkeys: Fix mismerge of protection keys CPUID bits
mm/pkeys: Fix siginfo ABI breakage caused by new u64 field
x86/mm/pkeys: Fix access_error() denial of writes to write-only VMA
mm/core, x86/mm/pkeys: Add execute-only protection keys support
x86/mm/pkeys: Create an x86 arch_calc_vm_prot_bits() for VMA flags
x86/mm/pkeys: Allow kernel to modify user pkey rights register
x86/fpu: Allow setting of XSAVE state
x86/mm: Factor out LDT init from context init
mm/core, x86/mm/pkeys: Add arch_validate_pkey()
mm/core, arch, powerpc: Pass a protection key in to calc_vm_flag_bits()
x86/mm/pkeys: Actually enable Memory Protection Keys in the CPU
x86/mm/pkeys: Add Kconfig prompt to existing config option
x86/mm/pkeys: Dump pkey from VMA in /proc/pid/smaps
x86/mm/pkeys: Dump PKRU with other kernel registers
mm/core, x86/mm/pkeys: Differentiate instruction fetches
x86/mm/pkeys: Optimize fault handling in access_error()
mm/core: Do not enforce PKEY permissions on remote mm access
um, pkeys: Add UML arch_*_access_permitted() methods
mm/gup, x86/mm/pkeys: Check VMAs and PTEs for protection keys
x86/mm/gup: Simplify get_user_pages() PTE bit handling
...
2016-03-20 19:08:56 -07:00
drivers/hwtracing: make coresight-* explicitly non-modular
2016-02-20 14:11:01 -08:00
bcma: move parallel flash support to separated file
2016-03-07 14:41:08 +02:00
ceph: initial CEPH_FEATURE_FS_FILE_LAYOUT_V2 support
2016-03-04 21:00:37 +01:00
clk: at91: pmc: drop at91_pmc_base
2016-02-17 17:53:03 +01:00
crush: add chooseleaf_stable tunable
2016-02-04 18:25:55 +01:00
powerpc/rcpm: add RCPM driver
2016-03-04 23:50:27 -06:00
gpio: Add devm_ apis for gpiochip_add_data and gpiochip_remove
2016-02-23 19:40:33 +05:30
iio: Fix typos in the struct iio_event_spec documentation comments
2016-02-17 21:11:08 +00:00
MIPS: Make smp CMP, CPS and MT use the new generic IPI functions
2016-02-25 10:56:58 +01:00
- New Drivers
2016-03-18 10:15:11 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2016-03-19 10:05:34 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2016-03-19 10:05:34 -07:00
netfilter: xtables: don't hook tables by default
2016-03-02 20:05:24 +01:00
netfilter: xtables: prepare for on-demand hook register
2016-03-02 20:05:23 +01:00
netfilter: xtables: prepare for on-demand hook register
2016-03-02 20:05:23 +01:00
netfilter: xtables: prepare for on-demand hook register
2016-03-02 20:05:23 +01:00
ARM: SoC platform updates for v4.6
2016-03-20 14:57:08 -07:00
power supply and reset changes for the v4.6 series
2016-03-17 12:50:55 -07:00
qed/qede: Add infrastructure support for hardware GRO
2016-03-07 15:01:39 -05:00
Merge remote-tracking branches 'regulator/topic/discharge', 'regulator/topic/fan53555', 'regulator/topic/gpio', 'regulator/topic/hi655x' and 'regulator/topic/lp872x' into regulator-next
2016-03-13 15:19:35 +07:00
mm: move max_map_count bits into mm.h
2016-03-17 15:09:34 -07:00
ARM: SoC platform updates for v4.6
2016-03-20 14:57:08 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2016-03-17 21:51:52 -07:00
include/linux/unaligned: force inlining of byteswap operations
2016-03-17 15:09:34 -07:00
USB: core: let USB device know device node
2016-03-05 12:05:01 -08:00
libata: fix HDIO_GET_32BIT ioctl
2016-02-11 10:07:18 -05:00
tty/serial: at91: fix bad offset for UART timeout register
2016-03-07 16:11:14 -08:00
powerpc updates for 4.6
2016-03-19 15:38:41 -07:00
autofs4: fix string.h include in auto_dev-ioctl.h
2016-03-15 16:55:16 -07:00
autofs4: coding style fixes
2016-03-15 16:55:16 -07:00
block: don't optimize for non-cloned bio in bio_get_last_bvec()
2016-03-12 14:12:10 -07:00
lib/bitmap.c: conversion routines to/from u32 array
2016-02-19 22:54:09 -05:00
blk-mq: dynamic h/w context count
2016-02-09 12:42:17 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-03-19 18:52:29 -07:00
bpf: convert stackmap to pre-allocation
2016-03-08 15:28:31 -05:00
bufferhead: force inlining of buffer head flag operations
2016-03-17 15:09:34 -07:00
mm: Some arch may want to use HPAGE_PMD related values as variables
2016-03-03 21:18:29 +11:00
arch: Introduce post-init read-only memory
2016-02-22 08:51:38 +01:00
crypto: ccp - CCP versioning support
2016-03-11 21:19:16 +08:00
cgroup: ignore css_sets associated with dead cgroups during migration
2016-03-16 13:31:46 -07:00
ARM: 8503/1: clk_register_clkdev: remove format string interface
2016-02-16 16:34:18 +00:00
clocksource: Introduce clocksource_freq2mult()
2016-02-27 08:55:30 +01:00
mm, compaction: introduce kcompactd
2016-03-17 15:09:34 -07:00
vfs: vfs: Define new syscalls preadv2,pwritev2
2016-03-04 12:20:10 -05:00
Merge commit 'fixes.2015.02.23a' into core/rcu
2016-03-15 09:01:06 +01:00
configfs: switch ->default groups to a linked list
2016-03-06 16:11:24 +01:00
coresight: introducing a global trace ID function
2016-02-20 14:11:01 -08:00
coresight: etb10: implementing AUX API
2016-02-20 14:11:01 -08:00
rcu: Make CPU_DYING_IDLE an explicit call
2016-03-01 20:36:58 +01:00
Merge branch 'pm-cpufreq-governor' into pm-cpufreq
2016-03-10 20:46:03 +01:00
cpu/hotplug: Make wait for dead cpu completion based
2016-03-01 20:36:58 +01:00
crypto: hash - Remove crypto_hash interface
2016-02-06 15:33:20 +08:00
misc: at24: replace memory_accessor with nvmem_device_read
2016-03-01 16:55:48 -08:00
dax: move writeback calls into the filesystems
2016-02-27 10:28:52 -08:00
uninline d_add()
2016-03-14 00:17:24 -04:00
debugfs: Add stub function for debugfs_create_automount().
2016-02-07 22:26:47 -08:00
dm snapshot: disallow the COW and origin devices from being identical
2016-03-10 17:12:09 -05:00
Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm
2016-03-19 16:31:54 -07:00
pty: make sure super_block is still valid in final /dev/tty close
2016-02-06 23:45:46 -08:00
ARM: 8506/1: common: DMA-mapping: add DMA_ATTR_ALLOC_SINGLE_PAGES attribute
2016-02-11 15:33:38 +00:00
virtio/vhost: new features, performance improvements, cleanups
2016-03-20 13:28:18 -07:00
Merge branch 'topic/pl330' into for-linus
2016-03-14 11:18:12 +05:30
misc: eeprom_93xx46: Add support for a GPIO 'select' line.
2016-02-11 19:23:28 -08:00
Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-03-20 18:58:18 -07:00
net: ethtool: remove unused __ethtool_get_settings
2016-02-25 22:06:47 -05:00
staging/lustre: proper support of NFS anonymous dentries
2016-02-25 22:12:26 -08:00
mm: fault-inject take over bootstrap kmem_cache check
2016-03-15 16:55:16 -07:00
fbdev: kill fb_rotate
2016-02-26 13:28:35 +02:00
staging/android: remove struct sync_pt
2016-02-07 17:34:58 -08:00
objtool: Add STACK_FRAME_NON_STANDARD() macro
2016-02-29 08:35:10 +01:00
timer: convert timer_slack_ns from unsigned long to u64
2016-03-17 15:09:34 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-03-19 18:52:29 -07:00
untangle fsnotify_d_instantiate() a bit
2016-03-14 00:17:28 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-03-19 18:52:29 -07:00
sched/debug: Fix preempt_disable_ip recording for preempt_disable()
2016-02-29 09:53:10 +01:00
mm: exclude ZONE_DEVICE from GFP_ZONE_TABLE
2016-03-17 15:09:34 -07:00
Revert "gpio: remove broken irq_to_gpio() interface"
2016-02-20 12:53:31 +01:00
timer: convert timer_slack_ns from unsigned long to u64
2016-03-17 15:09:34 -07:00
powerpc updates for 4.6
2016-03-19 15:38:41 -07:00
Drivers: hv: util: Pass the channel information during the init call
2016-03-01 16:57:20 -08:00
mac80211: limit the A-MSDU Tx based on peer's capabilities
2016-02-24 09:04:20 +01:00
bridge: allow zero ageing time
2016-03-11 14:58:58 -05:00
team: track sum of rx_nohandler for all slaves
2016-02-06 02:59:51 -05:00
igmp: Namespacify igmp_qrv sysctl knob
2016-02-11 09:59:22 -05:00
module: replace copy_module_from_fd with kernel version
2016-02-21 09:06:12 -05:00
asm-generic: Consolidate mark_rodata_ro()
2016-02-22 08:51:37 +01:00
iommu/vt-d: Clear PPR bit to ensure we get more page request interrupts
2016-02-15 12:42:38 +00:00
x86/ACPI/PCI: Recognize that Interrupt Line 255 means "not connected"
2016-03-09 01:23:35 +01:00
libnvdimm for 4.6
2016-03-16 17:45:56 -07:00
net: ipv6: Make address flushing on ifdown optional
2016-02-25 21:45:15 -05:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-03-15 12:48:48 -07:00
Staging driver patches for 4.6-rc1
2016-03-17 22:13:41 -07:00
iscsi_ibft: Add prefix-len attr and display netmask
2016-03-14 10:30:57 -04:00
jbd2: unify revoke and tag block checksum handling
2016-02-22 23:19:09 -05:00
kasan: add functions to clear stack poison
2016-03-09 15:43:42 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2016-03-19 10:05:34 -07:00
KEYS: Add an alloc flag to convey the builtinness of a key
2016-02-09 16:40:46 +00:00
KVM: Use simple waitqueue for vcpu->wq
2016-02-25 11:27:16 +01:00
sched/debug: Make schedstats a runtime tunable that is disabled by default
2016-02-09 11:54:23 +01:00
leds: core: avoid error message when a USB LED device is unplugged
2016-03-14 09:22:20 +01:00
libata: Align ata_device's id on a cacheline
2016-02-25 16:37:06 -05:00
nfit: disable userspace initiated ars during scrub
2016-03-05 12:24:06 -08:00
Merge branch 'for-4.6/drivers' of git://git.kernel.dk/linux-block
2016-03-18 17:13:31 -07:00
list: kill list_force_poison()
2016-03-09 15:43:42 -08:00
include/linux/list_bl.h: use bool instead of int for boolean functions
2016-03-17 15:09:34 -07:00
livepatch/module: remove livepatch module notifier
2016-03-17 09:45:10 +01:00
kernel/locking/lockdep.c: convert hash tables to hlists
2016-02-11 18:35:48 -08:00
module: replace copy_module_from_fd with kernel version
2016-02-21 09:06:12 -05:00
mbcache: add reusable flag to cache entries
2016-02-22 22:44:04 -05:00
bus: mvebu-mbus: provide api for obtaining IO and DRAM window information
2016-03-14 12:19:46 -04:00
mm: workingset: make shadow node shrinker memcg aware
2016-03-17 15:09:34 -07:00
Char/Misc patches for 4.6-rc1
2016-03-17 13:47:50 -07:00
mm/compaction: speed up pageblock_pfn_to_page() when zone is contiguous
2016-03-15 16:55:16 -07:00
mm, page_owner: track and print last migrate reason
2016-03-15 16:55:16 -07:00
Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-03-20 19:08:56 -07:00
Merge branch 'x86/urgent' into x86/asm, to pick up fixes
2016-02-18 09:28:03 +01:00
mm/core, arch, powerpc: Pass a protection key in to calc_vm_flag_bits()
2016-02-18 19:46:30 +01:00
mm, debug: move bad flags printing to bad_page()
2016-03-15 16:55:16 -07:00
mm: scale kswapd watermarks in proportion to memory
2016-03-17 15:09:34 -07:00
fsl-mc: msi: Added FSL-MC-specific member to the msi_desc's union
2016-02-07 19:10:12 -08:00
namei: teach lookup_slow() to skip revalidate
2016-03-14 00:15:46 -04:00
libnvdimm: async notification support
2016-03-05 12:24:06 -08:00
net: Make sock_alloc exportable
2016-03-09 16:36:13 -05:00
net: add tc offload feature flag
2016-02-17 09:47:36 -05:00
net: add MACsec netdevice priv_flags and helper
2016-03-13 22:40:24 -04:00
netfilter: don't call hooks unless needed
2016-03-02 20:05:26 +01:00
nfnetlink: Revert "nfnetlink: add support for memory mapped netlink"
2016-02-18 11:42:22 -05:00
nfs: fix nfs_size_to_loff_t
2016-02-08 15:20:01 -05:00
pnfs/blocklayout: fix a memeory leak when using,vmalloc_to_page
2016-02-17 11:44:45 -05:00
rcu: Make CPU_DYING_IDLE an explicit call
2016-03-01 20:36:58 +01:00
nvmem: Add backwards compatibility support for older EEPROM drivers.
2016-03-01 16:55:48 -08:00
DeviceTree updates for 4.6:
2016-03-19 15:15:07 -07:00
of: earlycon: Move address translation to of_setup_earlycon()
2016-02-06 22:07:37 -08:00
memory: omap-gpmc: Add support for AAD timings
2016-02-08 16:22:03 +02:00
mm: exclude ZONE_DEVICE from GFP_ZONE_TABLE
2016-03-17 15:09:34 -07:00
include/linux/page-flags.h: force inlining of selected page flag modifications
2016-03-17 15:09:34 -07:00
mm, page_owner: track and print last migrate reason
2016-03-15 16:55:16 -07:00
mm, page_owner: dump page owner info from dump_page()
2016-03-15 16:55:16 -07:00
mm/page_ref: add tracepoint to track down page reference manipulation
2016-03-17 15:09:34 -07:00
mm: introduce page reference manipulation functions
2016-03-17 15:09:34 -07:00
PCI: Consolidate PCI DMA constants and interfaces in linux/pci-dma-compat.h
2016-03-07 11:39:16 -06:00
powerpc updates for 4.6
2016-03-19 15:38:41 -07:00
PCI: Add PCI_CLASS_SERIAL_USB_DEVICE definition
2016-03-15 08:52:28 -05:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2016-03-19 10:05:34 -07:00
mm: fix pfn_t vs highmem
2016-02-11 18:35:48 -08:00
mm: fix pfn_t vs highmem
2016-02-11 18:35:48 -08:00
phy: remove documentation of removed members of phy_device structure
2016-03-13 22:11:43 -04:00
phy: fixed: Fix removal of phys.
2016-03-14 15:43:11 -04:00
mm/core, x86/mm/pkeys: Add execute-only protection keys support
2016-02-18 19:46:33 +01:00
PM / Domains: remove old power on/off latencies
2016-02-15 23:18:15 +01:00
PM / OPP: Add dev_pm_opp_set_rate()
2016-02-10 01:11:54 +01:00
libnvdimm, pmem: clear poison on write
2016-03-09 15:15:32 -08:00
mm/page_poisoning.c: allow for zero poisoning
2016-03-15 16:55:16 -07:00
timer: convert timer_slack_ns from unsigned long to u64
2016-03-17 15:09:34 -07:00
posix-cpu-timers: Migrate to use new tick dependency mask model
2016-03-02 16:44:27 +01:00
power_supply: Add types for USB Type C and PD chargers
2016-02-15 07:02:32 +01:00
time: Remove duplicated code in ktime_get_raw_and_real()
2016-03-02 17:13:02 -08:00
ARM: 8511/1: ARM64: kernel: PSCI: move PSCI idle management code to drivers/firmware
2016-02-11 15:33:38 +00:00
pstore: Add support for 64 Bit address space
2016-03-10 09:43:36 -08:00
ptp: Add PTP_SYS_OFFSET_PRECISE for driver crosstimestamping
2016-03-03 14:23:43 -08:00
spi: pxa2xx: Add support for both chip selects on Intel Braswell
2016-02-09 19:01:11 +00:00
fix Christoph's email addresses
2016-03-17 15:09:34 -07:00
radix-tree,shmem: introduce radix_tree_iter_next()
2016-03-17 15:09:34 -07:00
drivers: char: random: add get_random_long()
2016-02-27 10:28:52 -08:00
rcu: Add list_next_or_null_rcu
2016-03-09 16:36:13 -05:00
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-03-15 13:50:29 -07:00
Merge remote-tracking branch 'regmap/topic/update-bits' into regmap-next
2016-03-05 21:30:41 +09:00
net: rfkill: add rfkill_find_type function
2016-02-24 09:12:45 +01:00
mm: make remove_migration_ptes() beyond mm/migration.c
2016-03-17 15:09:34 -07:00
Input: synaptics-rmi4 - add SPI transport driver
2016-03-10 16:04:24 -08:00
rtc: Add functions to set and read rtc offset
2016-03-14 17:08:15 +01:00
Merge branch 'akpm' (patches from Andrew)
2016-03-18 19:26:54 -07:00
hwmon: (scpi) add energy meter support
2016-02-16 09:26:27 +00:00
module: replace copy_module_from_fd with kernel version
2016-02-21 09:06:12 -05:00
tty: Add software emulated RS485 support for 8250
2016-02-06 22:23:26 -08:00
of: earlycon: Move address translation to of_setup_earlycon()
2016-02-06 22:07:37 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-03-08 12:34:12 -05:00
slub: convert SLAB_DEBUG_FREE to SLAB_CONSISTENCY_CHECKS
2016-03-15 16:55:16 -07:00
mm/slab: alternative implementation for DEBUG_SLAB_LEAK
2016-03-15 16:55:16 -07:00
mm/slub: support left redzone
2016-03-15 16:55:16 -07:00
kcm: Kernel Connection Multiplexor module
2016-03-09 16:36:14 -05:00
rcu: Document unique-name limitation for DEFINE_STATIC_SRCU()
2016-02-23 19:59:55 -08:00
stm class: Plug stm device's unlink callback
2016-02-20 14:09:14 -08:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-03-08 12:34:12 -05:00
lib: move strtobool() to kstrtobool()
2016-03-17 15:09:34 -07:00
wait.[ch]: Introduce the simple waitqueue (swait) implementation
2016-02-25 11:27:16 +01:00
vfs: vfs: Define new syscalls preadv2,pwritev2
2016-03-04 12:20:10 -05:00
tcp: Add RFC4898 tcpEStatsPerfDataSegsOut/In
2016-03-14 14:55:26 -04:00
param: convert some "on"/"off" users to strtobool
2016-03-17 15:09:34 -07:00
time: Add history to cross timestamp interface supporting slower devices
2016-03-02 17:13:17 -08:00
time: Add history to cross timestamp interface supporting slower devices
2016-03-02 17:13:17 -08:00
tracepoints: move trace_print_flags definitions to tracepoint-defs.h
2016-03-15 16:55:16 -07:00
tracepoints: move trace_print_flags definitions to tracepoint-defs.h
2016-03-15 16:55:16 -07:00
tracing: Fix check for cpu online when event is disabled
2016-03-09 11:58:41 -05:00
lib/ucs2_string: Add ucs2 -> utf8 helper functions
2016-02-10 13:19:03 +00:00
usb: Add USB 3.1 Precision time measurement capability descriptor support
2016-02-14 17:03:23 -08:00
vfio: Add capability chain helpers
2016-02-22 16:10:08 -07:00
virtio: Add improved queue allocation API
2016-03-02 17:01:57 +02:00
virtio: Add improved queue allocation API
2016-03-02 17:01:57 +02:00
thp, vmstats: count deferred split events
2016-03-17 15:09:34 -07:00
VMCI: Use 32bit atomics for queue headers on X86_32
2016-02-07 21:36:02 -08:00
sched/wait: Fix wait_event_freezable() documentation
2016-02-24 09:09:45 +01:00
watchdog: Add support for minimum time between heartbeats
2016-03-16 21:11:19 +01:00
writeback: flush inode cgroup wb switches instead of pinning super_block
2016-03-03 14:42:50 -07:00
