Julien Thierry
19c95f261c
arm64: entry.S: Do not preempt from IRQ before all cpufeatures are enabled ...
Preempting from IRQ-return means that the task has its PSTATE saved
on the stack, which will get restored when the task is resumed and does
the actual IRQ return.
However, enabling some CPU features requires modifying the PSTATE. This
means that, if a task was scheduled out during an IRQ-return before all
CPU features are enabled, the task might restore a PSTATE that does not
include the feature enablement changes once scheduled back in.
* Task 1:
PAN == 0 ---| |---------------
| |<- return from IRQ, PSTATE.PAN = 0
| <- IRQ |
+--------+ <- preempt() +--
^
|
reschedule Task 1, PSTATE.PAN == 1
* Init:
--------------------+------------------------
^
|
enable_cpu_features
set PSTATE.PAN on all CPUs
Worse than this, since PSTATE is untouched when task switching is done,
a task missing the new bits in PSTATE might affect another task, if both
do direct calls to schedule() (outside of IRQ/exception contexts).
Fix this by preventing preemption on IRQ-return until features are
enabled on all CPUs.
This way the only PSTATE values that are saved on the stack are from
synchronous exceptions. These are expected to be fatal this early, the
exception is BRK for WARN_ON(), but as this uses do_debug_exception()
which keeps IRQs masked, it shouldn't call schedule().
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
[james: Replaced a really cool hack, with an even simpler static key in C.
expanded commit message with Julien's cover-letter ascii art]
Signed-off-by: James Morse <james.morse@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
2019-10-16 09:51:43 -07:00
drm/pl111: Support grayscale
2019-08-09 09:15:05 +02:00
linux-can-next-for-5.4-20190904
2019-09-05 12:17:50 +02:00
libceph: add function that clears osd client's abort_err
2019-09-16 12:06:23 +02:00
clk: add include guard to clk-conf.h
2019-09-17 10:27:46 -07:00
Char/Misc driver patches for 5.4-rc1
2019-09-18 11:14:31 -07:00
gpio: Initialize the irqchip valid_mask with a callback
2019-09-11 01:09:37 +01:00
staging: greybus: fix more header declarations
2019-08-28 17:24:22 +02:00
i3c: add addr and lvr to i2c_dev_desc structure
2019-08-11 10:48:28 +02:00
chrome platform changes for v5.4
2019-09-19 14:14:28 -07:00
Merge branch 'next' into for-linus
2019-09-16 09:56:27 -07:00
irqchip: Add include guard to irq-partition-percpu.h
2019-08-20 10:35:46 +01:00
mailbox: mediatek: cmdq: clear the event in cmdq initial flow
2019-09-17 00:40:05 -05:00
- New Drivers
2019-09-23 19:37:49 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2019-09-28 17:47:33 -07:00
dma-mapping updates for 5.4:
2019-09-19 13:27:23 -07:00
This pull-request contains the following changes for MTD:
2019-09-21 10:59:54 -07:00
netfilter: remove CONFIG_NETFILTER checks from headers.
2019-09-13 12:47:36 +02:00
netfilter: remove CONFIG_NETFILTER checks from headers.
2019-09-13 12:47:36 +02:00
netfilter: remove CONFIG_NETFILTER checks from headers.
2019-09-13 12:47:36 +02:00
netfilter: remove CONFIG_NETFILTER checks from headers.
2019-09-13 12:47:36 +02:00
netfilter: remove CONFIG_NETFILTER checks from headers.
2019-09-13 12:47:36 +02:00
pinctrl/gpio: Take MUX usage into account
2019-08-23 11:09:41 +02:00
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/evalenti/linux-soc-thermal
2019-09-29 10:24:23 -07:00
RDMA subsystem updates for 5.4
2019-09-21 10:26:24 -07:00
regulator: add missing 'static inline' to a helper's stub
2019-09-03 12:37:16 +01:00
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-09-28 12:39:07 -07:00
drm main pull for 5.4-rc1
2019-09-19 16:24:24 -07:00
soundwire: stream: make stream name a const pointer
2019-09-04 14:57:28 +05:30
Highlights:
2019-09-27 17:00:27 -07:00
USB changes for 5.4-rc1
2019-09-18 10:33:46 -07:00
wimax: no need to check return value of debugfs_create functions
2019-08-10 15:25:47 -07:00
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-09-28 08:14:15 -07:00
alarmtimers: Avoid rtc.h include
2019-08-20 22:09:52 +02:00
iommu/amd: Re-factor guest virtual APIC (de-)activation code
2019-08-09 17:30:40 +02:00
kill LOOKUP_NO_EVAL, don't bother including namei.h from audit.h
2019-08-30 21:29:32 -04:00
writeback, memcg: Implement foreign dirty flushing
2019-08-27 09:22:38 -06:00
writeback: Separate out wb_get_lookup() from wb_get_create()
2019-08-27 09:22:38 -06:00
backlight: Expose brightness curve type through sysfs
2019-09-02 15:55:03 +01:00
blkcg: separate blkcg_conf_get_disk() out of blkg_conf_prep()
2019-08-28 21:17:04 -06:00
block: Delay default elevator initialization
2019-09-05 19:52:34 -06:00
blkcg: implement blk-iocost
2019-08-28 21:17:12 -06:00
for-5.4/post-2019-09-24
2019-09-24 16:31:50 -07:00
bpf: add new BPF_BTF_GET_NEXT_ID syscall command
2019-08-20 09:51:06 -07:00
bpf: introduce verifier internal test flag
2019-08-28 00:30:11 +02:00
kprobes: Prohibit probing on BUG() and WARN() address
2019-09-05 10:15:16 +02:00
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2019-08-09 09:17:05 -07:00
Merge branches 'clk-init-destroy', 'clk-doc', 'clk-imx' and 'clk-allwinner' into clk-next
2019-09-19 15:31:27 -07:00
We have a small collection of core framework updates this time, mostly around
2019-09-20 15:45:07 -07:00
mm, compaction: raise compaction priority after it withdrawns
2019-09-24 15:54:10 -07:00
include/linux/compiler.h: fix Oops for Clang-compiled kernels
2019-09-08 14:53:58 +02:00
Make use of gcc 9's "asm inline()" (Rasmus Villemoes):
2019-09-21 09:47:19 -07:00
driver-core: add include guard to linux/container.h
2019-09-04 13:38:26 +02:00
cpu/SMT: create and export cpu_smt_possible()
2019-09-24 13:37:28 +02:00
cpufreq: Remove CPUFREQ_ADJUST and CPUFREQ_NOTIFY policy notifier events
2019-09-02 22:44:04 +02:00
Power management updates for 5.4-rc1
2019-09-17 19:15:14 -07:00
cpuidle-haltpoll: vcpu hotplug support
2019-09-03 09:36:36 +02:00
cpumask: nicer for_each_cpumask_and() signature
2019-09-25 17:51:40 -07:00
fs/core/vmcore: Move sev_active() reference to x86 arch code
2019-08-09 22:52:10 +10:00
selinux/stable-5.4 PR 20190917
2019-09-23 11:21:04 -07:00
PM / devfreq: events: extend events by type of counted data
2019-08-25 12:44:38 +09:00
USB changes for 5.4-rc1
2019-09-18 10:33:46 -07:00
dma-buf: rename reservation_object to dma_resv
2019-08-13 09:09:30 +02:00
dma-direct: fix zone selection after an unaddressable CMA allocation
2019-08-21 07:14:10 +09:00
dma-fence: Store the timestamp in the same union as the cb_list
2019-08-17 18:46:33 +01:00
dma-mapping updates for 5.4:
2019-09-19 13:27:23 -07:00
dma-mapping: remove arch_dma_mmap_pgprot
2019-08-29 16:43:22 +02:00
dma-buf: Restore seqlock around dma_resv updates
2019-08-16 12:40:58 +01:00
EDAC: Prefer 'unsigned int' to bare use of 'unsigned'
2019-09-03 19:21:19 +02:00
efi: Export Runtime Configuration Interface table to sysfs
2019-08-08 11:10:25 +03:00
block: Introduce elevator features
2019-09-05 19:52:33 -06:00
error-injection: Consolidate override function definition
2019-08-07 13:52:43 +01:00
Modules updates for v5.4
2019-09-22 10:34:46 -07:00
extable: Add function to search only kernel exception table
2019-08-21 22:23:48 +10:00
f2fs: include charset encoding information in the superblock
2019-08-23 07:57:13 -07:00
backlight: drop EARLY_EVENT_BLANK support
2019-08-05 21:52:53 +02:00
bpf: fix accessing bpf_sysctl.file_pos on s390
2019-09-16 11:44:05 +02:00
Highlights:
2019-09-27 17:00:27 -07:00
fuse update for 5.4
2019-09-25 09:55:59 -07:00
fscrypt: add FS_IOC_REMOVE_ENCRYPTION_KEY_ALL_USERS ioctl
2019-08-12 19:18:50 -07:00
notify: export symbols for use by the knfsd file cache
2019-08-19 11:00:39 -04:00
fs-verity: implement FS_IOC_MEASURE_VERITY ioctl
2019-08-12 19:33:50 -07:00
device property: Remove duplicate test for NULL
2019-08-26 11:40:24 +02:00
Revert "Revert "Revert "mm, thp: consolidate THP gfp handling into alloc_hugepage_direct_gfpmask""
2019-09-28 14:05:38 -07:00
Linux 5.3-rc7
2019-09-05 11:40:54 +02:00
staging: greybus: move core include files to include/linux/greybus/
2019-08-27 19:02:59 +02:00
HID: core: Add printk_once variants to hid_warn() etc
2019-09-18 15:58:13 +02:00
hmm: use mmu_notifier_get/put for 'struct hmm'
2019-08-20 09:35:02 -03:00
hrtimer: Add kernel doc annotation for HRTIMER_MODE_HARD
2019-08-28 13:01:25 +02:00
libnvdimm fixes v5.4-rc1
2019-09-29 10:33:41 -07:00
mm: introduce page_size()
2019-09-24 15:54:08 -07:00
- First round of vmbus hibernation support from Dexuan Cui.
2019-09-24 12:36:31 -07:00
Merge branch 'i2c/for-5.4' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
2019-09-24 16:48:02 -07:00
powercap: idle_inject: Use higher resolution for idle injection
2019-09-03 11:33:29 +02:00
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-09-28 08:14:15 -07:00
posix-cpu-timers: Create a container struct
2019-08-28 11:50:33 +02:00
Input: add support for polling to input devices
2019-08-20 12:04:07 -07:00
Merge branches 'arm/omap', 'arm/exynos', 'arm/smmu', 'arm/mediatek', 'arm/qcom', 'arm/renesas', 'x86/amd', 'x86/vt-d' and 'core' into next
2019-09-11 12:39:19 +02:00
interconnect: Add pre_aggregate() callback
2019-08-13 23:02:48 +03:00
interconnect: Add support for path tags
2019-08-13 23:02:44 +03:00
Power management updates for 5.4-rc1
2019-09-17 19:15:14 -07:00
augmented rbtree: add new RB_DECLARE_CALLBACKS_MAX macro
2019-09-25 17:51:39 -07:00
Merge branch 'arm/smmu' into arm/mediatek
2019-08-30 16:12:10 +02:00
iomap: move the iomap_dio_rw ->end_io callback into a structure
2019-09-19 15:32:45 -07:00
iommu: Add helpers to set/get default domain type
2019-08-23 10:09:58 +02:00
resource: add a not device managed request_free_mem_region variant
2019-08-20 09:39:41 -03:00
irqdomain/debugfs: Use PAs to generate fwnode names
2019-08-07 14:24:54 +01:00
jbd2: remove jbd2_journal_inode_add_[write|wait]
2019-09-24 15:54:07 -07:00
kernel.h: Add non_block_start/end()
2019-09-07 04:28:05 -03:00
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-09-28 08:14:15 -07:00
afs: Provide an RCU-capable key lookup
2019-09-02 11:43:54 +01:00
kgdb: don't use a notifier to enter kgdb at panic; call directly
2019-09-25 17:51:40 -07:00
khugepaged: enable collapse pmd for pte-mapped THP
2019-09-24 15:54:11 -07:00
KVM: no need to check return value of debugfs_create functions
2019-08-05 12:55:49 +02:00
backlight: drop EARLY_EVENT_BLANK support
2019-08-05 21:52:53 +02:00
leds: Replace {devm_}led_classdev_register() macros with inlines
2019-09-01 13:33:16 +02:00
libnvdimm/security: Introduce a 'frozen' attribute
2019-08-29 13:49:13 -07:00
lightnvm: move metadata mapping to lower level driver
2019-08-06 08:20:10 -06:00
lib: logic_pio: Add logic_pio_unregister_range()
2019-08-13 14:54:24 +08:00
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-09-28 08:14:15 -07:00
include: mdio: Add driver data helpers
2019-09-05 12:32:05 +02:00
fs/core/vmcore: Move sev_active() reference to x86 arch code
2019-08-09 22:52:10 +10:00
mm: thp: make deferred split shrinker memcg aware
2019-09-24 15:54:11 -07:00
drivers/base/memory.c: don't store end_section_nr in memory blocks
2019-09-24 15:54:09 -07:00
Revert "Revert "mm, thp: restore node-local hugepage allocations""
2019-09-28 14:05:38 -07:00
libnvdimm fixes v5.4-rc1
2019-09-29 10:33:41 -07:00
mm: remove the unused MIGRATE_PFN_DEVICE flag
2019-08-20 09:35:03 -03:00
mm: treewide: clarify pgtable_page_{ctor,dtor}() naming
2019-09-26 10:10:44 -07:00
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-09-28 12:39:07 -07:00
fork: improve error message for corrupted page tables
2019-09-25 17:51:40 -07:00
mm/mmu_notifiers: annotate with might_sleep()
2019-09-07 04:28:04 -03:00
mm: thp: extract split_queue_* into a struct
2019-09-24 15:54:11 -07:00
Merge branch 'next-integrity' of git://git.kernel.org/pub/scm/linux/kernel/git/zohar/linux-integrity
2019-09-27 19:37:27 -07:00
MODSIGN: make new include file self contained
2019-08-06 13:41:04 -04:00
bus: Add support for Moxtet bus
2019-08-14 15:30:35 +02:00
mutex: Fix up mutex_waiter usage
2019-08-08 09:09:25 +02:00
fs/namei.c: keep track of nd->root refcount status
2019-09-03 09:30:45 -04:00
taprio: Add support for hardware offloading
2019-09-16 21:32:57 +02:00
netfilter: remove CONFIG_NETFILTER checks from headers.
2019-09-13 12:47:36 +02:00
netfilter: move nf_bridge_frag_data struct definition to a more appropriate header.
2019-09-13 12:35:33 +02:00
netfilter: move nf_bridge_frag_data struct definition to a more appropriate header.
2019-09-13 12:35:33 +02:00
NFS: Refactor nfs_instantiate() for dentry referencing callers
2019-09-20 15:15:24 -04:00
scsi: qla2xxx: Modify NVMe include directives
2019-08-12 21:34:08 -04:00
nvme-pci: Add support for variable IO SQ element size
2019-08-29 12:55:02 -07:00
gpio: of: Make of_gpio_simple_xlate() private
2019-09-11 14:46:02 +01:00
iommu/omap: Fix compilation warnings
2019-08-09 19:56:05 +02:00
padata: remove cpu_index from the parallel_queue
2019-09-13 21:15:41 +10:00
page flags: prioritize kasan bits over last-cpuid
2019-08-03 07:02:01 -07:00
mm, page_owner: keep owner info when freeing the page
2019-09-24 15:54:08 -07:00
mm: page cache: store only head pages in i_pages
2019-09-24 15:54:08 -07:00
pagewalk: separate function pointers from iterator data
2019-09-07 04:28:04 -03:00
PCI/P2PDMA: Introduce pci_p2pdma_unmap_sg()
2019-08-16 08:41:26 -05:00
pci-v5.4-changes
2019-09-23 19:16:01 -07:00
PCI/ACPI: Move _HPP & _HPX functions to pci-acpi.c
2019-08-28 15:25:53 -05:00
pci-v5.4-changes
2019-09-23 19:16:01 -07:00
perf: Allow normal events to output AUX data
2019-08-28 11:29:38 +02:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
2019-09-02 11:20:17 -07:00
net: fixed_phy: Add forward declaration for struct gpio_desc;
2019-09-05 11:54:14 +02:00
pidfd: add P_PIDFD to waitid()
2019-08-01 21:49:46 +02:00
USB changes for 5.4-rc1
2019-09-18 10:33:46 -07:00
PM / Domains: Align in-parameter names for some genpd functions
2019-08-05 10:58:19 +02:00
PM: QoS: Get rid of unused flags
2019-08-21 00:38:54 +02:00
PM / wakeup: Show wakeup sources stats in sysfs
2019-08-21 00:20:40 +02:00
posix-cpu-timers: Always clear head pointer on dequeue
2019-09-05 21:16:22 +02:00
lib/hexdump: make print_hex_dump_bytes() a nop on !DEBUG builds
2019-09-25 17:51:39 -07:00
software node: Add software_node_find_by_name()
2019-08-26 11:35:13 +02:00
PSCI: cpuidle: Refactor CPU suspend power_state parameter handling
2019-08-09 17:51:39 +01:00
pwm: Ensure pwm_apply_state() doesn't modify the state argument
2019-09-21 03:25:10 +02:00
quota: fix wrong condition in is_quota_modification()
2019-09-12 12:09:16 +02:00
vfs: Convert ramfs, shmem, tmpfs, devtmpfs, rootfs to use the new mount API
2019-09-12 21:05:34 -04:00
fdt: add support for rng-seed
2019-08-23 16:39:26 +01:00
augmented rbtree: rework the RB_DECLARE_CALLBACKS macro definition
2019-09-25 17:51:39 -07:00
rcu/nocb: Atomic ->len field in rcu_segcblist structure
2019-08-13 14:35:49 -07:00
rcu/sync: Remove custom check for RCU readers
2019-08-09 11:01:08 -07:00
rcu: Add support for consolidated-RCU reader checking
2019-08-09 11:00:35 -07:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-09-16 17:25:49 -07:00
rcu: Don't include <linux/ktime.h> in rcutiny.h
2019-08-26 16:27:01 -07:00
tasks, sched/core: With a grace period after finish_task_switch(), remove unnecessary code
2019-09-25 17:42:29 +02:00
cifs: Add support for root file systems
2019-09-16 11:43:38 -05:00
locking/rwsem: Check for operations on an uninitialized rwsem
2019-08-06 12:49:15 +02:00
arm64: entry.S: Do not preempt from IRQ before all cpufeatures are enabled
2019-10-16 09:51:43 -07:00
firmware: arm_scmi: Add RESET protocol in SCMI v2.0
2019-08-12 12:23:02 +01:00
Merge branch 'next-lockdown' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security
2019-09-28 08:14:15 -07:00
vfs: Convert ramfs, shmem, tmpfs, devtmpfs, rootfs to use the new mount API
2019-09-12 21:05:34 -04:00
mm: shrinker: make shrinker not depend on memcg kmem
2019-09-24 15:54:11 -07:00
signal: Allow cifs and drbd to receive their terminating signals
2019-08-19 06:34:13 -05:00
sk_buff: drop all skb extensions on free and skb scrubbing
2019-09-27 20:40:19 +02:00
mm, slab: move memcg_cache_params structure to mm/slab.h
2019-09-24 15:54:07 -07:00
net/tls: prevent skb_orphan() from leaking TLS plain text with offload
2019-08-08 22:39:35 -07:00
media: lib/sort.c: implement sort() variant taking context argument
2019-08-19 13:14:53 -03:00
net: stmmac: implement support for passive mode converters via dt
2019-09-11 15:27:09 +01:00
kernel-doc: core-api: include string.h into core-api
2019-09-25 17:51:39 -07:00
ACPI: PM: s2idle: Execute LPS0 _DSM functions with suspended devices
2019-08-08 11:26:01 +02:00
mm: introduce MADV_PAGEOUT
2019-09-25 17:51:41 -07:00
swiotlb: Split size parameter to map/unmap APIs
2019-09-11 12:34:29 +02:00
base: soc: Add serial_number attribute to soc
2019-08-05 14:56:30 -07:00
ipc: fix sparc64 ipc() wrapper
2019-09-07 21:42:25 +02:00
sysfs: add BIN_ATTR_WO() macro
2019-09-04 13:37:17 +02:00
block: centralize PI remapping logic to the block layer
2019-09-17 20:03:49 -06:00
tcp: Add TCP_INFO counter for packets received out-of-order
2019-09-16 16:26:11 +02:00
uaccess: add missing __must_check attributes
2019-09-25 17:51:40 -07:00
thunderbolt: Add support for Intel Ice Lake
2019-08-26 12:15:06 +03:00
vfs: Add file timestamp range support
2019-08-30 07:27:17 -07:00
timekeeping/vsyscall: Prevent math overflow in BOOTTIME update
2019-08-23 02:12:11 +02:00
timers: Prepare support for PREEMPT_RT
2019-08-01 20:51:22 +02:00
hwrng: timeriomem - add include guard to timeriomem-rng.h
2019-08-02 14:45:14 +10:00
posix-cpu-timers: Utilize timerqueue for storage
2019-08-28 11:50:43 +02:00
bpf: add include guard to tnum.h
2019-08-20 17:05:05 +02:00
Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-09-16 17:25:49 -07:00
tracing: Make exported ftrace_set_clr_event non-static
2019-08-31 06:51:49 -04:00
uaccess: add missing __must_check attributes
2019-09-25 17:51:40 -07:00
usb: add a HCD_DMA flag instead of guestimating DMA capabilities
2019-08-21 10:03:35 -07:00
PKCS#7: Refactor verify_pkcs7_signature()
2019-08-05 18:40:18 -04:00
Kbuild: Handle PREEMPT_RT for version string and magic
2019-08-14 01:10:42 +09:00
mm/vmalloc: modify struct vmap_area to reduce its size
2019-09-24 15:54:10 -07:00
w1: add 1-wire master driver for IP block found in SGI ASICs
2019-09-04 14:34:31 +02:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2019-09-17 12:35:15 -07:00
workqueue: unconfine alloc/apply/free_workqueue_attrs()
2019-09-13 21:15:39 +10:00
writeback, memcg: Implement cgroup_writeback_by_id()
2019-08-27 09:22:38 -06:00
zpool: add malloc_support_movable to zpool_driver
2019-09-24 15:54:12 -07:00
