The generic PCI driver is required for SATA device probe on Alpine platform,
so it cannot be modular.
Signed-off-by: NTsahee Zidenberg <tsahee@annapurnalabs.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Signed-off-by: NTomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Needed in several Chromebook models such as the Tegra-based ones.
Signed-off-by: NTomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Needed in several Chromebook models such as the Tegra-based ones.
Signed-off-by: NTomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

This brings the DevFreq framework in and builds the ACTMON driver that
on Tegra124 will scale the external memory clock based on current load.
Signed-off-by: NTomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Renesas R-Car sound (= rsnd) needs 2 DMAC which are called as
Audio DMAC (= 1st DMAC) and Audio DMAC peri peri (2nd DMAC).
And rsnd had assumed that 1st / 2nd DMACs are implemented as DMAEngine.
But, in result of DMA ML discussion, 2nd DMAC was concluded that it is
not a general purpose DMAC (2nd DMAC is for Device to Device inside
sound system). Additionally, current DMAEngine can't support Device to
Device, and we don't have correct DT bindings for it at this point.
So the easiest solution for it is that move it from DMAEngine to rsnd
driver.
Audio DMAC peri peri DMAEngine is no longer needed.
Remove all CONFIG_RCAR_AUDMAC_PP from ARM defconfigs
Signed-off-by: NKuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Following the introduction of the Marvell Armada 39x support, let's
enable this support by default in multi_v7_defconfig.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Cc: <arm@kernel.org>
Signed-off-by: NOlof Johansson <olof@lixom.net>

Many Exynos boards have an HDMI port so enable Exynos DRM HDMI
support.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

This patch enables the options to mount a rootfs over NFS and also
support for automatic configuration of IP addresses during boot as
needed by NFS.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

There are currently more than 16 partitions on the eMMC of all recent
Qualcomm devices. Increase the number of minors per block device to
detect all available partitions.
Signed-off-by: NGeorgi Djakov <gdjakov@mm-sol.com>
Signed-off-by: NKumar Gala <galak@codeaurora.org>

Now that Armada 375/38x have support for the PMU, this commit enables perf
events in the defconfig.
Signed-off-by: NEzequiel Garcia <ezequiel.garcia@free-electrons.com>
Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: NGregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>

Exynos Chromebooks have an Embedded Controller known as the ChromeOS EC
Enable the driver that provides an interface to access from user-space.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Current Exynos CPU idle driver supports entering AFTR (Arm Off, Top
Running) mode on Exynos 4210 (coupled), Exynos 4x12 and Exynos 5250.
Enable it in default configuration to reduce energy consumption.
Signed-off-by: NKrzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Exynos5420 Peach Pit and Exynos5800 Peach Pi boards have a MMC/SDIO
Marvell WiFi-Ex chip. This patch enables wireless support and the
mwifiex driver.
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

After removing ARCH_REQUIRE_GPIOLIB we need to select
CONFIG_GPIOLIB to keep building the pinctrl drivers. Make the
defconfig smaller too by running savedefconfig.
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NKumar Gala <galak@codeaurora.org>

Enable the LPASS clock controller driver so that audio drivers
can enable, disable, and set rates on their clocks.
Signed-off-by: NRajendra Nayak <rnayak@codeaurora.org>
Signed-off-by: NKumar Gala <galak@codeaurora.org>
[sboyd@codeaurora.org: Enable 8960 driver too]
Signed-off-by: NStephen Boyd <sboyd@codeaurora.org>
Signed-off-by: NKumar Gala <galak@codeaurora.org>

Enable n900 modem as loadable modules.
Acked-by: NAcked-By: Sebastian Reichel <sre@kernel.org>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Many omaps have bluetooth, so let's make it available
as modules.
Signed-off-by: NTony Lindgren <tony@atomide.com>

This is used on many omap boards.
Signed-off-by: NTony Lindgren <tony@atomide.com>

scripts/checkkconfigsymbols.py indicates that omap1_defconfig
references the following obsolete Kconfig symbols:

CONFIG_BT_L2CAP
CONFIG_BT_SCO
CONFIG_DEBUG_ERRORS
CONFIG_EXPERIMENTAL
CONFIG_FB_OMAP_BOOTLOADER_INIT
CONFIG_LEDS_CPU
CONFIG_MACH_OMAP_HTCWIZARD
CONFIG_MTD_CHAR
CONFIG_MTD_DEBUG
CONFIG_MTD_DEBUG_VERBOSE
CONFIG_MTD_PARTITIONS
CONFIG_NET_ETHERNET
CONFIG_RCU_CPU_STALL_DETECTOR
CONFIG_SCSI_MULTI_LUN
CONFIG_USB_DEVICE_CLASS
CONFIG_VIDEO_OUTPUT_CONTROL

Drop them from omap1_defconfig.
Signed-off-by: NPaul Walmsley <paul@pwsan.com>
Cc: Paul Bolle <pebolle@tiscali.nl>
Cc: Valentin Rothberg <valentinrothberg@gmail.com>
Cc: Stefan Hengelein <stefan.hengelein@fau.de>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Tony Lindgren <tony@atomide.com>
Cc: linux-kernel@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-omap@vger.kernel.org
Signed-off-by: NTony Lindgren <tony@atomide.com>

LZMA compression makes about 33% smaller zImage
with just a slight extra decompression time.

Before this patch, zImage built with o2+_dc
is 4.5MiB and after it's about 3.3MiB.
Suggested-by: NDavid Cohen <david.a.cohen@linux.intel.com>
Signed-off-by: NFelipe Balbi <balbi@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

This driver is needed for USB cable type detection on dra7-evm,
dra72-evm and am57xx-beagle-x15.
Signed-off-by: NRoger Quadros <rogerq@ti.com>
Signed-off-by: NTony Lindgren <tony@atomide.com>

Enable Bluetooth over serial support.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

It is used for max7310 gpio expandor which is used at imx6qdl
sabreauto board.
Signed-off-by: NPeter Chen <peter.chen@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

Signed-off-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NSimon Horman <horms+renesas@verge.net.au>

Following the introduction of the Marvell Armada 39x support, let's
enabled it by default in mvebu_v7_defconfig.
Signed-off-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: NGregory CLEMENT <gregory.clement@free-electrons.com>

Enabling Exynos DRM IOMMU support for Exynos is currently broken and
causes a BUG on exynos-iommu driver. This was not an issue since the
options was disabled in exynos_defconfig but after commit 8dcc14f8
("drm/exynos: IOMMU support should not be selectable by user"), it is
selected if EXYNOS_IOMMU is enabled which is in exynos_defconfig.

So a kernel built using exynos_defconfig after the mentioned commit
fails to boot [0]. Disable IOMMU support in Exynos defconfig until
things get sorted out.

[0]:
[    1.242183] ------------[ cut here ]------------
[    1.246191] kernel BUG at drivers/iommu/exynos-iommu.c:481!
[    1.251747] Internal error: Oops - BUG: 0 [#1] PREEMPT SMP ARM
[    1.257561] Modules linked in:
[    1.260603] CPU: 1 PID: 1 Comm: swapper/0 Not tainted 3.19.0-07478-g796e1c55 #490
[    1.268412] Hardware name: SAMSUNG EXYNOS (Flattened Device Tree)
[    1.274489] task: ee06c000 ti: ee05a000 task.ti: ee05a000
[    1.279874] PC is at __exynos_sysmmu_enable+0x184/0x190
[    1.285080] LR is at exynos_iommu_attach_device+0x44/0xb0
[    1.290461] pc : [<c0254a14>]    lr : [<c0254a64>]    psr: 60000193
[    1.290461] sp : ee05bcf8  ip : 00000000  fp : ed84aa40
[    1.301916] r10: ed84a890  r9 : a0000113  r8 : 6db30000
[    1.307125] r7 : ed84aa40  r6 : 00000000  r5 : 00000000  r4 : ee174e10
[    1.313635] r3 : 6db30000  r2 : ed84aa40  r1 : 6db30000  r0 : ee174e10
[    1.320147] Flags: nZCv  IRQs off  FIQs on  Mode SVC_32  ISA ARM  Segment kernel
[    1.327524] Control: 10c5387d  Table: 4000406a  DAC: 00000015
[    1.333252] Process swapper/0 (pid: 1, stack limit = 0xee05a210)
[    1.339241] Stack: (0xee05bcf8 to 0xee05c000)
[    1.343581] bce0:                                                       6db30000 ee174e10
[    1.351741] bd00: ed84a880 00000000 ed84aa40 ee174e10 a0000113 ed84a890 00000000 c0254a64
[    1.359900] bd20: 00000000 6db30000 ee174e10 ed84adc0 00000005 00000034 00000001 c0692c1c
[    1.368059] bd40: 00000097 c02526c8 ee29f050 c0017210 ee29f050 ee174e10 edab6810 c0282558
[    1.376219] bd60: edab6a10 ee1cb000 00000005 c0283520 ee29f240 c028f210 edab6810 ee2ef280
[    1.384378] bd80: edb24680 ed84a680 ee1cb000 c02883f8 edab6810 ee1cb000 ee1cb000 00000000
[    1.392537] bda0: ed84a680 ee2ef450 00000000 c027e968 ee1cb000 00000000 00000000 c0268fd4
[    1.400696] bdc0: edab6800 c06b0de4 ee1cb000 c026a8bc ee2ef0c0 c028f210 00000002 ee2ef460
[    1.408855] bde0: ee2ef460 00000002 ee2ef280 c0288728 c04af5d0 edab6810 ee2ef280 00000000
[    1.417014] be00: c06b1348 c0288918 c06b0f00 c06b0f00 edab6810 00000001 c06b0da0 c027eaf4
[    1.425173] be20: c070334c edaee190 00000000 edab6810 ffffffed c06b0da0 00000000 c028da1c
[    1.433332] be40: edab6810 c070334c 00000000 c028c5f8 edab6810 c06b0da0 edab6844 00000000
[    1.441492] be60: eda3c740 c028c7a4 c06b0da0 00000000 c028c718 c028af74 ee005274 ee3b7b40
[    1.449652] be80: c06b0da0 ee3b7680 c06b1540 c028bde4 c05b6990 c06b0da0 c0703324 c06b0da0
[    1.457811] bea0: c0703324 00000000 c069ab18 c028cdc4 00000000 00000000 c0703324 c027ebd8
[    1.465970] bec0: 00000000 c05b6990 ffffffff 00000000 00000000 00000000 00000000 c00c4574
[    1.474129] bee0: 00000000 00000000 c069ab18 c027eb1c 00000000 c069ab18 c069ab18 c0008944
[    1.482288] bf00: 00000036 c04770e8 ee049800 c06eace0 ee06c000 60000113 c069eab0 00000000
[    1.490447] bf20: 00000000 c069eab0 60000113 00000000 ef7fcabc ef7fcaae c061c594 c0038640
[    1.498607] bf40: c05cb1d0 c061bc24 00000006 00000006 c069ea50 c06724d4 00000006 c06724b4
[    1.506766] bf60: c06c7600 c0647588 c0692c1c 00000097 00000000 c0647d40 00000006 00000006
[    1.514925] bf80: c0647588 c003d2d8 00000000 c046921c 00000000 00000000 00000000 00000000
[    1.523084] bfa0: 00000000 c0469224 00000000 c000e680 00000000 00000000 00000000 00000000
[    1.531243] bfc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000
[    1.539402] bfe0: 00000000 00000000 00000000 00000000 00000013 00000000 00000000 00000000
[    1.547567] [<c0254a14>] (__exynos_sysmmu_enable) from [<c0254a64>] (exynos_iommu_attach_device+0x44/0xb0)
[    1.557199] [<c0254a64>] (exynos_iommu_attach_device) from [<c02526c8>] (iommu_attach_device+0x18/0x24)
[    1.566576] [<c02526c8>] (iommu_attach_device) from [<c0017210>] (arm_iommu_attach_device+0x18/0x50)
[    1.575690] [<c0017210>] (arm_iommu_attach_device) from [<c0282558>] (drm_iommu_attach_device+0x50/0xb4)
[    1.585150] [<c0282558>] (drm_iommu_attach_device) from [<c0283520>] (fimd_bind+0x94/0x1b8)
[    1.593483] [<c0283520>] (fimd_bind) from [<c02883f8>] (component_bind_all+0xb4/0x214)
[    1.601380] [<c02883f8>] (component_bind_all) from [<c027e968>] (exynos_drm_load+0x9c/0x13c)
[    1.609802] [<c027e968>] (exynos_drm_load) from [<c0268fd4>] (drm_dev_register+0xa0/0xf4)
[    1.617960] [<c0268fd4>] (drm_dev_register) from [<c026a8bc>] (drm_platform_init+0x44/0xcc)
[    1.626293] [<c026a8bc>] (drm_platform_init) from [<c0288728>] (try_to_bring_up_master.part.3+0xc8/0x104)
[    1.635839] [<c0288728>] (try_to_bring_up_master.part.3) from [<c0288918>] (component_master_add_with_match+0xcc/0x114)
[    1.646602] [<c0288918>] (component_master_add_with_match) from [<c027eaf4>] (exynos_drm_platform_probe+0xec/0x114)
[    1.657019] [<c027eaf4>] (exynos_drm_platform_probe) from [<c028da1c>] (platform_drv_probe+0x48/0x98)
[    1.666221] [<c028da1c>] (platform_drv_probe) from [<c028c5f8>] (driver_probe_device+0x114/0x234)
[    1.675075] [<c028c5f8>] (driver_probe_device) from [<c028c7a4>] (__driver_attach+0x8c/0x90)
[    1.683494] [<c028c7a4>] (__driver_attach) from [<c028af74>] (bus_for_each_dev+0x54/0x88)
[    1.691653] [<c028af74>] (bus_for_each_dev) from [<c028bde4>] (bus_add_driver+0xd8/0x1cc)
[    1.699812] [<c028bde4>] (bus_add_driver) from [<c028cdc4>] (driver_register+0x78/0xf4)
[    1.707797] [<c028cdc4>] (driver_register) from [<c027ebd8>] (exynos_drm_init+0xbc/0x110)
[    1.715956] [<c027ebd8>] (exynos_drm_init) from [<c0008944>] (do_one_initcall+0x80/0x1d0)
[    1.724117] [<c0008944>] (do_one_initcall) from [<c0647d40>] (kernel_init_freeable+0x108/0x1d4)
[    1.732796] [<c0647d40>] (kernel_init_freeable) from [<c0469224>] (kernel_init+0x8/0xe4)
[    1.740869] [<c0469224>] (kernel_init) from [<c000e680>] (ret_from_fork+0x14/0x34)
[    1.748419] Code: e3403110 11a02001 01a02003 eaffffe4 (e7f001f2)
[    1.754502] ---[ end trace f58ad362326928d7 ]---
Signed-off-by: NJavier Martinez Canillas <javier.martinez@collabora.co.uk>
Acked-by: NMarek Szyprowski <m.szyprowski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Select CONFIG_VFAT_FS by default.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

Select CONFIG_VFAT_FS by default.
Signed-off-by: NFabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page
table levels folded.  Usually, these defines are provided by
<asm-generic/pgtable-nopmd.h> and <asm-generic/pgtable-nopud.h>.

But some architectures fold page table levels in a custom way.  They
need to define these macros themself.  This patch adds missing defines.

The patch fixes mm->nr_pmds underflow and eliminates dead __pmd_alloc()
and __pud_alloc() on architectures without these page table levels.
Signed-off-by: NKirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Aaro Koskinen <aaro.koskinen@iki.fi>
Cc: David Howells <dhowells@redhat.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Helge Deller <deller@gmx.de>
Cc: "James E.J. Bottomley" <jejb@parisc-linux.org>
Cc: Koichi Yasutake <yasutake.koichi@jp.panasonic.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Commit:

   1e02ce4c ("x86: Store a per-cpu shadow copy of CR4")

added a shadow CR4 such that reads and writes that do not
modify the CR4 execute much faster than always reading the
register itself.

The change modified cpu_init() in common.c, so that the
shadow CR4 gets initialized before anything uses it.

Unfortunately, there's two cpu_init()s in common.c. There's
one for 64-bit and one for 32-bit. The commit only added
the shadow init to the 64-bit path, but the 32-bit path
needs the init too.

Link: http://lkml.kernel.org/r/20150227125208.71c36402@gandalf.local.home Fixes: 1e02ce4c "x86: Store a per-cpu shadow copy of CR4"
Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
Acked-by: NAndy Lutomirski <luto@amacapital.net>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Link: http://lkml.kernel.org/r/20150227145019.2bdd4354@gandalf.local.homeSigned-off-by: NIngo Molnar <mingo@kernel.org>

ARM64 CPUidle driver requires the cpu_do_idle function so that it can
be used to enter the shallowest idle state, and it is declared in
asm/proc-fns.h.

The current ARM64 CPUidle driver does not include asm/proc-fns.h
explicitly and it has so far relied on implicit inclusion from other
header files.

Owing to some header dependencies reshuffling this currently triggers
build failures when CONFIG_ARM64_64K_PAGES=y:

drivers/cpuidle/cpuidle-arm64.c: In function "arm64_enter_idle_state"
drivers/cpuidle/cpuidle-arm64.c:42:3: error: implicit declaration of
function "cpu_do_idle" [-Werror=implicit-function-declaration]
   cpu_do_idle();
   ^

This patch adds the explicit inclusion of the asm/proc-fns.h header file
in the arm64 asm/cpuidle.h header file, so that the build breakage is fixed
and the required header inclusion is added to the appropriate arch back-end
CPUidle header, already included by the CPUidle arm64 driver, where
CPUidle arch related function declarations belong.
Reported-by: NLaura Abbott <lauraa@codeaurora.org>
Signed-off-by: NLorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: NWill Deacon <will.deacon@arm.com>
Tested-by: NMark Rutland <mark.rutland@arm.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

The native (64-bit) sigval_t union contains sival_int (32-bit) and
sival_ptr (64-bit). When a compat application invokes a syscall that
takes a sigval_t value (as part of a larger structure, e.g.
compat_sys_mq_notify, compat_sys_timer_create), the compat_sigval_t
union is converted to the native sigval_t with sival_int overlapping
with either the least or the most significant half of sival_ptr,
depending on endianness. When the corresponding signal is delivered to a
compat application, on big endian the current (compat_uptr_t)sival_ptr
cast always returns 0 since sival_int corresponds to the top part of
sival_ptr. This patch fixes copy_siginfo_to_user32() so that sival_int
is copied to the compat_siginfo_t structure.

Cc: <stable@vger.kernel.org>
Reported-by: NBamvor Jian Zhang <bamvor.zhangjian@huawei.com>
Tested-by: NBamvor Jian Zhang <bamvor.zhangjian@huawei.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

With commit 3690951f (arm64: Use swiotlb late initialisation), the
swiotlb buffer size is limited to MAX_ORDER_NR_PAGES. However, there are
platforms with 32-bit only devices that require bounce buffering via
swiotlb. This patch changes the swiotlb initialisation to an early 64MB
memblock allocation. In order to get the swiotlb buffer correctly
allocated (via memblock_virt_alloc_low_nopanic), this patch also defines
ARCH_LOW_ADDRESS_LIMIT to the maximum physical address capable of 32-bit
DMA.
Reported-by: NKefeng Wang <wangkefeng.wang@huawei.com>
Tested-by: NKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

This commit enables the cpufreq subsystem. Moreover, support
for using CPU as a cooling device is provided.
Signed-off-by: NLukasz Majewski <l.majewski@samsung.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Enabling thermal emulation on Exynos SoCs. New sysfs attribute
- emul_temp is created.
Signed-off-by: NLukasz Majewski <l.majewski@samsung.com>
Acked-by: NEduardo Valentin <edubezval@gmail.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

After Exynos TMU rework to use device tree for configuration
this flag can be removed. It is not used anymore.
Signed-off-by: NLukasz Majewski <l.majewski@samsung.com>
Acked-by: NEduardo Valentin <edubezval@gmail.com>
Signed-off-by: NKukjin Kim <kgene@kernel.org>

Patch 2f896d58 ("arm64: use fixmap for text patching") changed
the way we patch the kernel text, using a fixmap when the kernel or
modules are flagged as read only.

Unfortunately, a flaw in the logic makes it fall over when patching
modules without CONFIG_DEBUG_SET_MODULE_RONX enabled:

[...]
[   32.032636] Call trace:
[   32.032716] [<fffffe00003da0dc>] __copy_to_user+0x2c/0x60
[   32.032837] [<fffffe0000099f08>] __aarch64_insn_write+0x94/0xf8
[   32.033027] [<fffffe000009a0a0>] aarch64_insn_patch_text_nosync+0x18/0x58
[   32.033200] [<fffffe000009c3ec>] ftrace_modify_code+0x58/0x84
[   32.033363] [<fffffe000009c4e4>] ftrace_make_nop+0x3c/0x58
[   32.033532] [<fffffe0000164420>] ftrace_process_locs+0x3d0/0x5c8
[   32.033709] [<fffffe00001661cc>] ftrace_module_init+0x28/0x34
[   32.033882] [<fffffe0000135148>] load_module+0xbb8/0xfc4
[   32.034044] [<fffffe0000135714>] SyS_finit_module+0x94/0xc4
[...]

This is triggered by the use of virt_to_page() on a module address,
which ends to pointing to Nowhereland if you're lucky, or corrupt
your precious data if not.

This patch fixes the logic by mimicking what is done on arm:
- If we're patching a module and CONFIG_DEBUG_SET_MODULE_RONX is set,
  use vmalloc_to_page().
- If we're patching the kernel and CONFIG_DEBUG_RODATA is set,
  use virt_to_page().
- Otherwise, use the provided address, as we can write to it directly.

Tested on 4.0-rc1 as a KVM guest.
Reported-by: NRichard W.M. Jones <rjones@redhat.com>
Reviewed-by: NKees Cook <keescook@chromium.org>
Acked-by: NMark Rutland <mark.rutland@arm.com>
Acked-by: NLaura Abbott <lauraa@codeaurora.org>
Tested-by: NRichard W.M. Jones <rjones@redhat.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: NMarc Zyngier <marc.zyngier@arm.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

This patch increases the interleave factor for parallel AES modes
to 4x. This improves performance on Cortex-A57 by ~35%. This is
due to the 3-cycle latency of AES instructions on the A57's
relatively deep pipeline (compared to Cortex-A53 where the AES
instruction latency is only 2 cycles).

At the same time, disable inline expansion of the core AES functions,
as the performance benefit of this feature is negligible.

  Measured on AMD Seattle (using tcrypt.ko mode=500 sec=1):

  Baseline (2x interleave, inline expansion)
  ------------------------------------------
  testing speed of async cbc(aes) (cbc-aes-ce) decryption
  test 4 (128 bit key, 8192 byte blocks): 95545 operations in 1 seconds
  test 14 (256 bit key, 8192 byte blocks): 68496 operations in 1 seconds

  This patch (4x interleave, no inline expansion)
  -----------------------------------------------
  testing speed of async cbc(aes) (cbc-aes-ce) decryption
  test 4 (128 bit key, 8192 byte blocks): 124735 operations in 1 seconds
  test 14 (256 bit key, 8192 byte blocks): 92328 operations in 1 seconds
Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>

Caught during Trinity testing. The pte_modify does not allow
modification for PTE type bit. This cause the test to hang
the system. It is found that the PTE can't transit from an
inaccessible page (b00) to a valid page (b11) because the mask
does not allow it. This happens when a big block of mmaped
memory is set the PROT_NONE, then the a small piece is broken
off and set to PROT_WRITE | PROT_READ cause a huge page split.
Signed-off-by: NFeng Kan <fkan@apm.com>
Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>