Ard Biesheuvel
6f26b36711
arm64: kaslr: increase randomization granularity ...
Currently, our KASLR implementation randomizes the placement of the core
kernel at 2 MB granularity. This is based on the arm64 kernel boot
protocol, which mandates that the kernel is loaded TEXT_OFFSET bytes above
a 2 MB aligned base address. This requirement is a result of the fact that
the block size used by the early mapping code may be 2 MB at the most (for
a 4 KB granule kernel)
But we can do better than that: since a KASLR kernel needs to be relocated
in any case, we can tolerate a physical misalignment as long as the virtual
misalignment relative to this 2 MB block size is equal in size, and code to
deal with this is already in place.
Since we align the kernel segments to 64 KB, let's randomize the physical
offset at 64 KB granularity as well (unless CONFIG_DEBUG_ALIGN_RODATA is
enabled). This way, the page table and TLB footprint is not affected.
The higher granularity allows for 5 bits of additional entropy to be used.
Reviewed-by: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
2016-04-28 19:44:15 +01:00
Merge branch 'acpi-processor'
2016-04-02 01:17:36 +02:00
Merge branch 'for-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/libata
2016-03-18 20:06:46 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial
2016-03-17 21:38:27 -07:00
PM / wakeirq: fix wakeirq setting after wakup re-configuration from sysfs
2016-04-07 22:23:47 +02:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client
2016-04-07 16:34:26 -07:00
arm[64] perf updates for 4.6:
2016-03-21 13:14:16 -07:00
Revert "ppdev: use new parport device model"
2016-03-25 09:02:13 -07:00
clk: qcom: ipq4019: add some fixed clocks for ddrppl and fepll
2016-03-29 16:31:16 -07:00
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-03-24 10:32:42 -07:00
Merge branches 'pm-cpufreq', 'pm-cpuidle' and 'acpi-cppc'
2016-04-08 21:46:05 +02:00
cpuidle: menu: Fall back to polling if next timer event is near
2016-03-21 15:50:28 +01:00
Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
2016-03-23 06:12:39 -07:00
PM / devfreq: Spelling s/frequnecy/frequency/
2016-03-17 02:30:16 +01:00
asm-generic changes for 4.6
2016-03-24 23:13:48 -07:00
dma-buf: Update docs for SYNC ioctl
2016-03-21 09:26:45 +01:00
EDAC queue for 4.6
2016-03-16 08:36:55 -07:00
IEEE 1394 subsystem patch:
2016-03-25 08:52:25 -07:00
arm64: kaslr: increase randomization granularity
2016-04-28 19:44:15 +01:00
gpio: pca953x: Use correct u16 value for register word write
2016-04-08 11:49:47 +02:00
Merge branch 'drm-fixes-4.6' of git://people.freedesktop.org/~agd5f/linux into drm-fixes
2016-04-07 07:08:46 +10:00
drivers/hid/uhid.c: check write() bitness using in_compat_syscall
2016-03-22 15:36:02 -07:00
Char/Misc patches for 4.6-rc1
2016-03-17 13:47:50 -07:00
hwmon: (max1111) Return -ENODEV from max1111_read_channel if not instantiated
2016-03-27 10:37:48 -07:00
i2c: jz4780: really prevent potential division by zero
2016-04-09 08:36:44 +02:00
ide: palm_bk3710: test clock rate to avoid division by 0
2016-03-20 16:59:27 -04:00
intel_idle: Add KBL support
2016-04-07 22:11:08 +02:00
Second set of IIO fixes for the 4.6 cycle.
2016-04-04 13:45:10 -07:00
Revert "ib_srpt: Convert to percpu_ida tag allocation"
2016-04-07 18:16:20 -07:00
Merge branch 'akpm' (patches from Andrew)
2016-03-25 16:59:11 -07:00
iommu/vt-d: Silence an uninitialized variable warning
2016-04-07 14:51:47 +02:00
irqchip/gic: Restore CPU interface checking
2016-04-25 15:14:00 +01:00
Drivers: isdn: hisax: isac.c: Fix assignment and check into one expression.
2016-03-27 22:38:12 -04:00
platform-drivers-x86 for 4.6-1
2016-03-23 17:20:59 -07:00
lightnvm: do not load L2P table if not supported
2016-03-18 18:10:38 -07:00
Merge branches 'pm-cpufreq', 'pm-cpuidle' and 'acpi-cppc'
2016-04-08 21:46:05 +02:00
Merge tag 'md/4.6-rc2-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/shli/md
2016-04-09 11:23:27 -07:00
media fixes for v4.6-rc2
2016-04-05 06:47:50 -07:00
MTD updates for v4.6
2016-03-24 19:57:15 -07:00
drivers/memstick/host/r592.c: avoid gcc-6 warning
2016-03-25 16:37:42 -07:00
- New Drivers
2016-03-18 10:15:11 -07:00
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
MMC host:
2016-04-10 17:38:55 -07:00
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
tuntap: restore default qdisc
2016-04-08 15:52:45 -04:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2016-03-19 10:05:34 -07:00
NTB: Remove _addr functions from ntb_hw_amd
2016-03-26 11:44:33 -04:00
Merge branch 'libnvdimm-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
2016-04-09 14:05:45 -07:00
nvme: avoid cqe corruption when update at the same time as read
2016-03-22 10:27:29 -06:00
of, numa: Add NUMA of binding implementation.
2016-04-15 18:06:08 +01:00
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
PCI changes for the v4.6 merge window:
2016-03-16 14:45:55 -07:00
Revert "PCI: dra7xx: Mark driver as broken"
2016-03-22 07:50:11 -05:00
pcmcia: db1xxx_ss: fix last irq_to_gpio user
2016-03-29 22:48:53 +02:00
drivers/perf: arm_pmu: avoid NULL dereference when not using devicetree
2016-03-21 11:36:17 +00:00
Revert "Revert "pinctrl: lantiq: Implement gpio_chip.to_irq""
2016-04-01 15:21:27 +02:00
Convert straggling drivers to new six-argument get_user_pages()
2016-04-02 18:35:05 -05:00
Power management and ACPI material for v4.6-rc1, part 2
2016-03-25 16:55:37 -07:00
powercap: intel_rapl: Add missing Haswell model
2016-04-05 03:44:48 +02:00
Merge branch 'timers-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-03-15 12:13:56 -07:00
pwm: omap-dmtimer: Add debug message for effective period and duty cycle
2016-03-23 17:11:48 +01:00
Convert straggling drivers to new six-argument get_user_pages()
2016-04-02 18:35:05 -05:00
- New Drivers
2016-03-18 10:15:11 -07:00
remoteproc: st: fix check of syscon_regmap_lookup_by_phandle() return value
2016-03-28 16:19:00 -07:00
RTC for 4.6 #2
2016-03-24 22:49:08 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
2016-04-01 07:15:54 -05:00
SCSI fixes on 20160408
2016-04-09 12:00:42 -07:00
ARM: SoC driver updates for v4.6
2016-03-20 15:40:32 -07:00
Merge remote-tracking branches 'spi/fix/omap2' and 'spi/fix/rockchip' into spi-linus
2016-04-04 10:05:49 -07:00
Staging / IIO driver fixes for 4.6-rc3
2016-04-09 12:09:37 -07:00
target: add a new add_wwn_groups fabrics method
2016-03-30 20:06:44 -07:00
Thermal: Ignore invalid trip points
2016-03-18 14:10:57 +08:00
tty: Fix merge of "tty: Refactor tty_open()"
2016-03-31 20:49:39 -07:00
USB fixes for 4.6-rc3
2016-04-09 12:23:02 -07:00
VFIO updates for v4.6-rc1
2016-03-17 13:05:09 -07:00
Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending
2016-03-22 12:41:14 -07:00
mm, fs: get rid of PAGE_CACHE_* and page_cache_{get,release} macros
2016-04-04 10:41:08 -07:00
virtio: virtio 1.0 cs04 spec compliance for reset
2016-04-07 15:16:39 +03:00
hpwdt: use nmi_panic() when kernel panics in NMI handler
2016-03-22 15:36:02 -07:00
xen/events: Mask a moving irq
2016-04-04 11:18:00 +01:00
6f26b36711