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2016-04-27ARM: dove: Remove CLK_IS_ROOTStephen Boyd
This flag is a no-op now (see commit 47b0eeb3dc8a "clk: Deprecate CLK_IS_ROOT", 2016-02-02) so remove it. Cc: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
2016-04-27ARC: add support for reserved memory defined by device treeAlexey Brodkin
Enable reserved memory initialization from device tree. Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: Grant Likely <grant.likely@linaro.org> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-04-27ARC: support generic per-device coherent dma memAlexey Brodkin
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com> Cc: linux-kernel@vger.kernel.org Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
2016-04-27ARM: orion5x: Remove CLK_IS_ROOTStephen Boyd
This flag is a no-op now (see commit 47b0eeb3dc8a "clk: Deprecate CLK_IS_ROOT", 2016-02-02) so remove it. Cc: Andrew Lunn <andrew@lunn.ch> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
2016-04-27ARM: mv78xx0: Remove CLK_IS_ROOTStephen Boyd
This flag is a no-op now (see commit 47b0eeb3dc8a "clk: Deprecate CLK_IS_ROOT", 2016-02-02) so remove it. Cc: Andrew Lunn <andrew@lunn.ch> Cc: Jason Cooper <jason@lakedaemon.net> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
2016-04-27ARM: davinci: da850: use clk->set_parent for async3David Lechner
The da850 family of processors has an async3 clock domain that can be muxed to either pll0_sysclk2 or pll1_sysclk2. Now that the davinci clocks have a set_parent callback, we can use this to control the async3 mux instead of a stand-alone function. This adds a new async3_clk and sets the appropriate child clocks. The default is use to pll1_sysclk2 since it is not affected by processor frequency scaling. Signed-off-by: David Lechner <david@lechnology.com> [nsekhar@ti.com: drop unnecessary comment] Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2016-04-27ARM: davinci: Move clock init after ioremap.David Lechner
Some clocks (such as the USB PHY clocks in DA8xx) will need to use iomem. The davinci_common_init() function must be called before the ioremap, so the clock init is now split out as separate function. Signed-off-by: David Lechner <david@lechnology.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2016-04-27Merge tag 'samsung-fixes-4.6' of ↵Arnd Bergmann
git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into fixes Fix for more theoretical than practical OOPS on first turn on of a exynos power domain, if there was no turn off before. Usually all power domains are on, so the first action is to turn off but some older bootloaders might behave differently. * tag 'samsung-fixes-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux: ARM: EXYNOS: Properly skip unitialized parent clock in power domain on
2016-04-27nios2: memset: use the right constraint modifier for the %4 output operandRomain Perier
Depending on the size of the area to be memset'ed, the nios2 memset implementation either uses a naive loop (for buffers smaller or equal than 8 bytes) or a more optimized implementation (for buffers larger than 8 bytes). This implementation does 4-byte stores rather than 1-byte stores to speed up memset. However, we discovered that on our nios2 platform, memset() was not properly setting the buffer to the expected value. A memset of 0xff would not set the entire buffer to 0xff, but to: 0xff 0x00 0xff 0x00 0xff 0x00 0xff 0x00 ... Which is obviously incorrect. Our investigation has revealed that the problem lies in the incorrect constraints used in the inline assembly. The following piece of assembly, from the nios2 memset implementation, is supposed to create a 4-byte value that repeats 4 times the 1-byte pattern passed as memset argument: /* fill8 %3, %5 (c & 0xff) */ " slli %4, %5, 8\n" " or %4, %4, %5\n" " slli %3, %4, 16\n" " or %3, %3, %4\n" However, depending on the compiler and optimization level, this code might be compiled as: 34: 280a923a slli r5,r5,8 38: 294ab03a or r5,r5,r5 3c: 2808943a slli r4,r5,16 40: 2148b03a or r4,r4,r5 This is wrong because r5 gets used both for %5 and %4, which leads to the final pattern stored in r4 to be 0xff00ff00 rather than the expected 0xffffffff. %4 is defined with the "=r" constraint, i.e as an output operand. However, as explained in http://www.ethernut.de/en/documents/arm-inline-asm.html, this does not prevent gcc from using the same register for an output operand (%4) and input operand (%5). By using the constraint modifier '&', we indicate that the register should be used for output only. With this change, we get the following assembly output: 34: 2810923a slli r8,r5,8 38: 4150b03a or r8,r8,r5 3c: 400e943a slli r7,r8,16 40: 3a0eb03a or r7,r7,r8 Which correctly produces the 0xffffffff pattern when 0xff is passed as the memset() pattern. It is worth mentioning the observed consequence of this bug: we were hitting the kernel BUG() in mm/bootmem.c:__free() that verifies when marking a page as free that it was previously marked as occupied (i.e that the bit was set to 1). The entire bootmem bitmap is set to 0xff bit via a memset() during the bootmem initialization. The bootmem_free() call right after the initialization was finding some bits to be set to 0, which didn't make sense since the bitmap has just been memset'ed to 0xff. Except that due to the bug explained above, the bitmap was in fact initialized to 0xff00ff00. Thanks to Marek Vasut for his help and feedback. Signed-off-by: Romain Perier <romain.perier@free-electrons.com> Acked-by: Marek Vasut <marex@denx.de> Acked-by: Ley Foon Tan <lftan@altera.com>
2016-04-27ARM: dts: exynos: Enable PRNG and SSS for all Exynos4 devicesKrzysztof Kozlowski
There is no external dependency for Security SubSystem (SSS) block so the nodes for Pseudo Random Number Generator and AES hardware acceleration can be enabled always for all Exynos4 devices. Suggested-by: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-04-27ARM: dts: exynos: Add exynos5420-fimd compatibleChanho Park
This patch changes the compatible of Exynos5420 fimd to "exynos5420-fimd". To support MIC bypass from display path, the new compatible is introduced for Exynos5420. Cc: Inki Dae <inki.dae@samsung.com> Signed-off-by: Chanho Park <chanho61.park@samsung.com> Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
2016-04-27ARM: dts: exynos: Remove unsupported s2mps11 regulator bindings from ↵Krzysztof Kozlowski
Exynos5420 boards The bindings like s2mps11,buck6-ramp-enable or s2mps11,buck2-ramp-delay were ignored. They were never parsed by s2mps11 regulator driver. Also the values used in these bindings were equal to default reset values of S2MPS11 device. It is safe to remove them. Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
2016-04-27powerpc: wire up preadv2 and pwritev2 syscallsRui Salvaterra
Wire up preadv2/pwritev2 in the same way as preadv/pwritev. Fixes two build warnings on ppc64. mpe: Lightly tested with fio (slightly hacked to add the syscall wrappers): fio-4217 [009] .... 1304.635300: sys_preadv2(fd: 3, vec: 10025821de0, vlen: 1, pos_l: 6253000, pos_h: 0, flags: 1) fio-4217 [009] .... 1304.635474: sys_preadv2 -> 0x1000 Signed-off-by: Rui Salvaterra <rsalvaterra@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-04-27powerpc/perf: Replace raw event hex values with #definesMadhavan Srinivasan
Minor cleanup patch to replace the raw event hex values in power8-pmu.c with #defines. Signed-off-by: Madhavan Srinivasan <maddy@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-04-27ARM: dts: r8a7794: Use SYSC "always-on" PM DomainGeert Uytterhoeven
Hook up all devices that are part of the CPG/MSTP Clock Domain to the SYSC "always-on" PM Domain, for a more consistent device-power-area description in DT. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7793: Use SYSC "always-on" PM DomainGeert Uytterhoeven
Hook up all devices that are part of the CPG/MSTP Clock Domain to the SYSC "always-on" PM Domain, for a more consistent device-power-area description in DT. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7791: Use SYSC "always-on" PM DomainGeert Uytterhoeven
Hook up all devices that are part of the CPG/MSTP Clock Domain to the SYSC "always-on" PM Domain, for a more consistent device-power-area description in DT. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7790: Use SYSC "always-on" PM DomainGeert Uytterhoeven
Hook up all devices that are part of the CPG/MSTP Clock Domain to the SYSC "always-on" PM Domain, for a more consistent device-power-area description in DT. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7779: Use SYSC "always-on" PM DomainGeert Uytterhoeven
Hook up all devices that are part of the CPG/MSTP Clock Domain to the SYSC "always-on" PM Domain, for a more consistent device-power-area description in DT. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7794: Add SYSC PM DomainsGeert Uytterhoeven
Add a device node for the System Controller. Hook up the Cortex-A7 CPU cores and the Cortex-A7 L2 cache/SCU to their respective PM Domains. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7793: Add SYSC PM DomainsGeert Uytterhoeven
Add a device node for the System Controller. Hook up the first Cortex-A15 CPU core and the Cortex-A15 L2 cache/SCU to their respective PM Domains. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7791: Add SYSC PM DomainsGeert Uytterhoeven
Add a device node for the System Controller. Hook up the Cortex-A15 CPU cores and the Cortex-A15 L2 cache/SCU to their respective PM Domains. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7790: Add SYSC PM DomainsGeert Uytterhoeven
Add a device node for the System Controller. Hook up the Cortex-A15 and Cortex-A7 CPU cores and L2 caches/SCUs to their respective PM Domains. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7779: Add SYSC PM DomainsGeert Uytterhoeven
Add a device node for the System Controller. Hook up ARM CPU cores 1-3 to their respective PM Domains. Note that ARM CPU core 0 cannot be shut off. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27arm64: dts: r8a7795: Use SYSC "always-on" PM DomainGeert Uytterhoeven
Hook up all devices that are part of the CPG/MSSR Clock Domain to the SYSC "always-on" PM Domain, for a more consistent device-power-area description in DT. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27arm64: dts: r8a7795: Add SYSC PM DomainsGeert Uytterhoeven
Add a device node for the System Controller. Hook up the Cortex-A57 CPU cores and the Cortex-A57 and Cortex A53 L2 caches/SCUs to their respective PM Domains. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: imx6: Do not hardcode the CLKO clockFabio Estevam
Using "IMX6QDL_CLK_CKO" for the clock is easier to read instead of the hardcoded clock number. Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2016-04-27ARM: dts: imx6: Add dts for Embest MarS BoardSergio Prado
Embest MarS Board [1] is a multi-core platform based on Freescale i.MX6 Cortex-A9 Dual Core, running up to 1GHz with 1 GB of RAM, 4GB of eMMC and with a 4MB SPI flash. [1] http://www.embest-tech.com/shop/star/marsboard.html Signed-off-by: Sergio Prado <sergio.prado@e-labworks.com> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2016-04-27arm64: defconfig: enable freescale/nxp config optionsStuart Yoder
enable standard drivers for the NXP/Freescale ls2080a and ls1043a SoCs: -system clock driver -sata (AHCI) -sd/mmc (ESDHC) -i2c support and i2c mux -i2c rtc clock -i2c sensors (as modules) Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2016-04-27arm64: defconfig: enable 48-bit virtual addressesStuart Yoder
Some armv8 SoCs (e.g. ls2080a) have physical memory maps with discontiguous DDR regions that require 48-bit VA to have the linear map cover the entire range of DDR. Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2016-04-27arm64: defconfig: cleanup the defconfigStuart Yoder
When doing: make defconfig make savedefconfig ...without making any changes, the newly saved defconfig does not match arch/arm64/configs/defconfig, and the diff looks like: $ diff defconfig arch/arm64/configs/defconfig 3a4 > CONFIG_FHANDLE=y Clean that up by committing the output of savedefconfig. Signed-off-by: Stuart Yoder <stuart.yoder@nxp.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Shawn Guo <shawnguo@kernel.org>
2016-04-27Merge tag 'renesas-rcar-sysc2-for-v4.7' into arm64-dt-pm-domain-for-v4.7Simon Horman
Second Round of Renesas ARM Based SoC R-Car SYSC Updates for v4.7 Introduce a DT-based driver for the R-Car System Controller, as found on Renesas R-Car H1, R-Car Gen2, and R-Car Gen3 SoCs.
2016-04-27arm64: dts: r8a7795: Don't disable referenced optional clocksGeert Uytterhoeven
clk_get() on a disabled clock node will return -EPROBE_DEFER, which can cause drivers to be deferred forever if such clocks are referenced in their devices' clocks properties. Update the various disabled external clock nodes to default to a frequency of 0, but don't disable them, to prevent this. Reported-by: Jürg Billeter <j@bitron.ch> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27arm64: dts: salvator-x: populate EXTALRWolfram Sang
It can be used for the watchdog. Signed-off-by: Wolfram Sang <wsa+renesas@sang-engineering.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27arm64: dts: r8a7795: enable PCIe on Salvator-XPhil Edworthy
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27arm64: dts: r8a7795: Add PCIe nodesPhil Edworthy
Signed-off-by: Phil Edworthy <phil.edworthy@renesas.com> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7794: Don't disable referenced optional clocksGeert Uytterhoeven
clk_get() on a disabled clock node will return -EPROBE_DEFER, which can cause drivers to be deferred forever if such clocks are referenced in their devices' clocks properties. Update the various disabled external clock nodes to default to a frequency of 0, but don't disable them, to prevent this. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7793: Don't disable referenced optional clocksGeert Uytterhoeven
clk_get() on a disabled clock node will return -EPROBE_DEFER, which can cause drivers to be deferred forever if such clocks are referenced in their devices' clocks properties. Update the various disabled external clock nodes to default to a frequency of 0, but don't disable them, to prevent this. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7790: Don't disable referenced optional clocksGeert Uytterhoeven
clk_get() on a disabled clock node will return -EPROBE_DEFER, which can cause drivers to be deferred forever if such clocks are referenced in their devices' clocks properties. Update the various disabled external clock nodes to default to a frequency of 0, but don't disable them, to prevent this. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7779: Don't disable referenced optional clocksGeert Uytterhoeven
clk_get() on a disabled clock node will return -EPROBE_DEFER, which can cause drivers to be deferred forever if such clocks are referenced in their devices' clocks properties. Update the various disabled external clock nodes to default to a frequency of 0, but don't disable them, to prevent this. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27ARM: dts: r8a7778: Don't disable referenced optional clocksGeert Uytterhoeven
clk_get() on a disabled clock node will return -EPROBE_DEFER, which can cause drivers to be deferred forever if such clocks are referenced in their devices' clocks properties. Update the various disabled external clock nodes to default to a frequency of 0, but don't disable them, to prevent this. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
2016-04-27Merge tag 'renesas-rcar-sysc2-for-v4.7' into dt-pm-domain-for-v4.7Simon Horman
Second Round of Renesas ARM Based SoC R-Car SYSC Updates for v4.7 Introduce a DT-based driver for the R-Car System Controller, as found on Renesas R-Car H1, R-Car Gen2, and R-Car Gen3 SoCs.
2016-04-27ftrace: Match dot symbols when searching functions on ppc64Thiago Jung Bauermann
In the ppc64 big endian ABI, function symbols point to function descriptors. The symbols which point to the function entry points have a dot in front of the function name. Consequently, when the ftrace filter mechanism searches for the symbol corresponding to an entry point address, it gets the dot symbol. As a result, ftrace filter users have to be aware of this ABI detail on ppc64 and prepend a dot to the function name when setting the filter. The perf probe command insulates the user from this by ignoring the dot in front of the symbol name when matching function names to symbols, but the sysfs interface does not. This patch makes the ftrace filter mechanism do the same when searching symbols. Fixes the following failure in ftracetest's kprobe_ftrace.tc: .../kprobe_ftrace.tc: line 9: echo: write error: Invalid argument That failure is on this line of kprobe_ftrace.tc: echo _do_fork > set_ftrace_filter This is because there's no _do_fork entry in the functions list: # cat available_filter_functions | grep _do_fork ._do_fork This change introduces no regressions on the perf and ftracetest testsuite results. Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: linuxppc-dev@lists.ozlabs.org Signed-off-by: Thiago Jung Bauermann <bauerman@linux.vnet.ibm.com> Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-04-27powerpc: rework sparse for lib/xor_vmx.cDaniel Axtens
Sparse doesn't seem to be passing -maltivec around properly, leading to lots of errors: .../include/altivec.h:34:2: error: Use the "-maltivec" flag to enable PowerPC AltiVec support arch/powerpc/lib/xor_vmx.c:27:16: error: Expected ; at end of declaration arch/powerpc/lib/xor_vmx.c:27:16: error: got signed arch/powerpc/lib/xor_vmx.c:60:9: error: No right hand side of '*'-expression arch/powerpc/lib/xor_vmx.c:60:9: error: Expected ; at end of statement arch/powerpc/lib/xor_vmx.c:60:9: error: got v1_in ... arch/powerpc/lib/xor_vmx.c:87:9: error: too many errors Only include the altivec.h header for non-__CHECKER__ builds. For builds with __CHECKER__, make up some stubs instead, as suggested by Balbir. (The vector size of 16 is arbitrary.) Suggested-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Daniel Axtens <dja@axtens.net> Tested-by: Balbir Singh <bsingharora@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-04-27powerpc: Add support for userspace P9 copy pasteChris Smart
The copy paste facility introduced in POWER9 provides an optimised mechanism for a userspace application to copy a cacheline. This is provided by a pair of instructions, copy and paste, while a third, cp_abort (copy paste abort), provides a clean up of the state in case of a failure. The copy instruction will read a 128 byte cacheline and store it in an internal buffer. The subsequent paste instruction will store this internal buffer to memory and set a CR field if the paste succeeds. Since the state of the copy paste buffer is internal (and not architecturally visible), in the unlikely event of a context switch, the state cannot be stored and the paste should therefore fail. The cp_abort instruction exists to fail and clean up any such interrupted copy paste sequence and is to be called by the kernel as part of the context switch. Doing so prevents data from a preceding copy in one process leaking into the paste of another. This code enables use of the cp_abort instruction if a supported processor is detected. NOTE: this is for userspace only, not in kernel, and does not deal with KVM guests. Patch created with much assistance from Michael Neuling <mikey@neuling.org> Signed-off-by: Chris Smart <chris@distroguy.com> Reviewed-by: Cyril Bur <cyrilbur@gmail.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-04-27powerpc/mpic: handle subsys_system_register() failureAndrew Donnellan
mpic_init_sys() currently doesn't check whether subsys_system_register() succeeded or not. Check the return code of subsys_system_register() and clean up if there's an error. Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-04-27powerpc/eeh: fix misleading indentationAndrew Donnellan
Found by smatch. Signed-off-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com> Acked-by: Russell Currey <ruscur@russell.cc> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2016-04-26Merge tag 'fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Arnd Bergmann: "Here are the latest bug fixes for ARM SoCs, mostly addressing recent regressions. Changes are across several platforms, so I'm listing every change separately here. Regressions since 4.5: - A correction of the psci firmware DT binding, to prevent users from relying on unintended semantics - Actually getting the newly merged clock driver for some OMAP platforms to work - A revert of patches for the Qualcomm BAM, these need to be reworked for 4.7 to avoid breaking boards other than the one they were intended for - A correction for the I2C device nodes on the Socionext Uniphier platform - i.MX SDHCI was broken for non-DT platforms due to a change with the setting of the DMA mask - A revert of a patch that accidentally added a nonexisting clock on the Rensas "Porter" board - A couple of OMAP fixes that are all related to suspend after the power domain changes for dra7 - On Mediatek, revert part of the power domain initialization changes that broke mt8173-evb Fixes for older bugs: - Workaround for an "external abort" in the omap34xx suspend/resume code. - The USB1/eSATA should not be listed as an excon device on am57xx-beagle-x15 (broken since v4.0) - A v4.5 regression in the TI AM33xx and AM43XX DT specifying incorrect DMA request lines for the GPMC - The jiffies calibration on Renesas platforms was incorrect for some modern CPU cores. - A hardware errata woraround for clockdomains on TI DRA7" * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: drivers: firmware: psci: unify enable-method binding on ARM {64,32}-bit systems arm64: dts: uniphier: fix I2C nodes of PH1-LD20 ARM: shmobile: timer: Fix preset_lpj leading to too short delays Revert "ARM: dts: porter: Enable SCIF_CLK frequency and pins" ARM: dts: r8a7791: Don't disable referenced optional clocks Revert "ARM: OMAP: Catch callers of revision information prior to it being populated" ARM: OMAP3: Fix external abort on 36xx waking from off mode idle ARM: dts: am57xx-beagle-x15: remove extcon_usb1 ARM: dts: am437x: Fix GPMC dma properties ARM: dts: am33xx: Fix GPMC dma properties Revert "soc: mediatek: SCPSYS: Fix double enabling of regulators" ARM: mach-imx: sdhci-esdhc-imx: initialize DMA mask ARM: DRA7: clockdomain: Implement timer workaround for errata i874 ARM: OMAP: Catch callers of revision information prior to it being populated ARM: dts: dra7: Correct clock tree for sys_32k_ck ARM: OMAP: DRA7: Provide proper class to omap2_set_globals_tap ARM: OMAP: DRA7: wakeupgen: Skip SAR save for wakeupgen Revert "dts: msm8974: Add dma channels for blsp2_i2c1 node" Revert "dts: msm8974: Add blsp2_bam dma node" ARM: dts: Add clocks for dm814x ADPLL
2016-04-26arm64: defconfig: Enable ACPIMark Brown
Enable ACPI by default to support testing of ACPI only systems and ensure that defconfig will boot on anything, for arm64 this is not done in Kconfig since a very large proportion of arm64 systems have no ACPI at all. Signed-off-by: Mark Brown <broonie@kernel.org> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Hanjun Guo <hanjun.guo@linaro.org> Acked-by: Roy Franz <roy.franz@hpe.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2016-04-26ARM: dts: add DTS for Baltos IR2110Yegor Yefremov
Signed-off-by: Yegor Yefremov <yegorslists@googlemail.com> Signed-off-by: Tony Lindgren <tony@atomide.com>