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2014-12-03clk: Change clk_ops->determine_rate to return a clk_hw as the best parentTomeu Vizoso
This is in preparation for clock providers to not have to deal with struct clk. Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Michael Turquette <mturquette@linaro.org>
2014-12-04PM / Kconfig: Do not select PM directly from Kconfig filesRafael J. Wysocki
It is not valid to select CONFIG_PM directly without selecting CONFIG_PM_SLEEP or CONFIG_PM_RUNTIME too, because that breaks dependencies (ia64 does that) and it is not necessary to select CONFIG_PM directly if CONFIG_PM_SLEEP or CONFIG_PM_RUNTIME is selected, because CONFIG_PM will be set automatically in that case (sh does that). Fix those mistakes. Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Kevin Hilman <khilman@linaro.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-04ARM: shmobile: Convert to genpd flags for PM clocks for R-mobileUlf Hansson
Instead of using the dev_ops ->stop|start() callbacks for genpd, let's convert to use genpd's flag field and set it to GENPD_FLAG_PM_CLK. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Tested-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-04ARM: shmobile: Convert to genpd flags for PM clocks for r8a7779Ulf Hansson
Instead of using the dev_ops ->stop|start() callbacks for genpd, let's convert to use genpd's flag field and set it to GENPD_FLAG_PM_CLK. Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org> Acked-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-03arm64: bpf: lift restriction on last instructionZi Shen Lim
Earlier implementation assumed last instruction is BPF_EXIT. Since this is no longer a restriction in eBPF, we remove this limitation. Per Alexei Starovoitov [1]: > classic BPF has a restriction that last insn is always BPF_RET. > eBPF doesn't have BPF_RET instruction and this restriction. > It has BPF_EXIT insn which can appear anywhere in the program > one or more times and it doesn't have to be last insn. [1] https://lkml.org/lkml/2014/11/27/2 Fixes: e54bcde3d69d ("arm64: eBPF JIT compiler") Acked-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: Zi Shen Lim <zlim.lnx@gmail.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2014-12-03ARM: 8221/1: PJ4: allow building in Thumb-2 modeArd Biesheuvel
Two files that get included when building the multi_v7_defconfig target fail to build when selecting THUMB2_KERNEL for this configuration. In both cases, we can just build the file as ARM code, as none of its symbols are exported to modules, so there are no interworking concerns. In the iwmmxt.S case, add ENDPROC() declarations so the symbols are annotated as functions, resulting in the linker to emit the appropriate mode switches. Acked-by: Nicolas Pitre <nico@linaro.org> Tested-by: Olof Johansson <olof@lixom.net> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8234/1: sa1100: reorder IRQ handling codeDmitry Eremin-Solenikov
This patch just reorders functions/data inside sa1100 irq driver to be able to merge functions that have the same code after converting to irqdomains and hwirq. No real code changes. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8233/1: sa1100: switch to hwirq usageDmitry Eremin-Solenikov
Switch internally to using hardware irq numbers (hwirq). In case of GPIO interrupts, hwirq is equal to GPIO number. In case of system interrupts, hwirq is equal to interrupt number in the interrupt controller. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8232/1: sa1100: merge GPIO multiplexer IRQ to "normal" irq domainDmitry Eremin-Solenikov
IRQ_GPIO11_27 is a shared IRQ receiving IRQs from "high" GPIOs. It is still handled by sa1100_normal_chip, so there is no point to exclude it from "normal" irq domain. The IRQF_VALID flag set by domain map function will be cleared by irq_set_chained_handler() internally. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8231/1: sa1100: introduce irqdomains supportDmitry Eremin-Solenikov
Use irqdomains to manage both system and GPIO interrupts on SA1100 SoC family. This opens path to further cleanup and unification in sa1100 IRQ drivers. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8230/1: sa1100: shift IRQs by oneDmitry Eremin-Solenikov
As IRQ0 should not be used (especially in when using irq domains), shift all virtual IRQ numbers by one. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8229/1: sa1100: replace irq numbers with names in irq driverDmitry Eremin-Solenikov
In preparation for further changes replace direct IRQ numbers with pre-defined names. This imposes no real code changes. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8228/1: sa1100: drop entry-macro.SDmitry Eremin-Solenikov
As mach-sa1100 was converted to MULTI_IRQ_HANDLER, drop now-unused entry-macro.S file. Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8227/1: sa1100: switch to MULTI_IRQ_HANDLERDmitry Eremin-Solenikov
Add sa1100_handle_irq implementating handle_irq for sa1100 platform. It is more or less a translation of old assembly code from assembler to plain C. Also install this irq handler from sa1100_init_irq(). Signed-off-by: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Tested-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8241/1: Update processor_modes for hyp and monitor modeStephen Boyd
If the kernel is running in hypervisor mode or monitor mode we'll print UK6_32 or UK10_32 if we call into __show_regs(). Let's update these strings to indicate the new modes that didn't exist when this code was written. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8240/1: MCPM: document mcpm_sync_init()Nicolas Pitre
Signed-off-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8239/1: Introduce {set,clear}_pte_bitJungseung Lee
Introduce helper functions for pte_mk* functions and it would be used to change individual bits in ptes at times. Signed-off-by: Jungseung Lee <js07.lee@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8238/1: mm: Refine set_memory_* functionsJungseung Lee
set_memory_* functions have same implementation except memory attribute. This patch makes to use common function for these, and pull out the functions into arch/arm/mm/pageattr.c like arm64 did. It will reduce code size and enhance the readability. Signed-off-by: Jungseung Lee <js07.lee@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8237/1: fix flush_pfn_aliasJungseung Lee
L1_CACHE_BYTES could be larger than real L1 cache line size. In that case, flush_pfn_alias() would omit to flush last bytes as much as L1_CACHE_BYTES - real cache line size. So fix end address to "to + PAGE_SIZE - 1". The bottom bits of the address is LINELEN. that is ignored by mcrr. Signed-off-by: Jungseung Lee <js07.lee@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8236/1: mm: fix discard_old_kernel_dataJungseung Lee
L1_CACHE_BYTES could be larger value than real L1 cache line size. In that case, discard_old_kernel_data() would omit to invalidate last bytes as much as L1_CACHE_BYTES - real cache line size. So fix end address to "to + PAGE_SIZE -1". The bottom bits of the address is LINELEN. that is ignored by mcrr. Signed-off-by: Jungseung Lee <js07.lee@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03ARM: 8235/1: Support for the PXN CPU feature on ARMv7Jungseung Lee
Modern ARMv7-A/R cores optionally implement below new hardware feature: - PXN: Privileged execute-never(PXN) is a security feature. PXN bit determines whether the processor can execute software from the region. This is effective solution against ret2usr attack. On an implementation that does not include the LPAE, PXN is optionally supported. This patch set PXN bit on user page table for preventing user code execution with privilege mode. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Jungseung Lee <js07.lee@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2014-12-03Merge tag 'kvm-s390-next-20141128' of ↵Paolo Bonzini
git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD KVM: s390: Several fixes,cleanups and reworks Here is a bunch of fixes that deal mostly with architectural compliance: - interrupt priorities - interrupt handling - intruction exit handling We also provide a helper function for getting the guest visible storage key.
2014-12-03ARM: at91: remove unused board.h fileArnd Bergmann
All functions declared in this file are gone. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [nicolas.ferre@atmel.com: re-order patches so modify board-dt-sam9] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-12-03ARM: at91: remove unneeded header filesNicolas Ferre
These files were left behind with no reason. Remove them. Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-12-03ARM: at91/clocksource: remove !DT PIT initializationsArnd Bergmann
As AT91 !DT code is now removed, cleanup the PIT clocksource driver. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [nicolas.ferre@atmel.com: split patch] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Boris BREZILLON <boris.brezillon@free-electrons.com> Cc: Daniel Lezcano <daniel.lezcano@linaro.org>
2014-12-03arm64: Implement support for read-mostly sectionsJungseok Lee
As putting data which is read mostly together, we can avoid unnecessary cache line bouncing. Other architectures, such as ARM and x86, adopted the same idea. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Jungseok Lee <jungseoklee85@gmail.com> Signed-off-by: Will Deacon <will.deacon@arm.com>
2014-12-02Merge 3.18-rc7 into staging-work.Greg Kroah-Hartman
We want those staging fixes in here as well. Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2014-12-02[IA64] Update comment that references __get_cpu_varChristoph Lameter
__get_cpu_var was removed. Update the comments. Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Christoph Lameter <cl@linux.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
2014-12-02ARM: dts: rockchip: Add input voltage supply regulators in pmic for MarsboardRomain Perier
vsys is the core always-on supply of the Marsboard. Signed-off-by: Romain Perier <romain.perier@gmail.com> Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2014-12-02ARM: at91: at91rm9200 ST initialization is now DT onlyArnd Bergmann
As at91rm9200 is now DT only, there is no need to keep old entry point in this at91rm9200 System Timer (ST) driver. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [nicolas.ferre@atmel.com: split patch] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-12-02ARM: at91: remove old AT91-specific driversArnd Bergmann
GPIO and LED drivers were replaced by generic ones for DT boards. These drivers were remaining: delete them now. Modifications are also done on the corresponding header files. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [nicolas.ferre@atmel.com: split patch] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-12-02ARM: at91: cleanup initilisation code by removing dead codeArnd Bergmann
The AT91-specific SoC strucutre "struct at91_init_soc" was filled with specific !DT initilisation functions. Now that we got rid of the !DT board file description, remove unneeded functions. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [nicolas.ferre@atmel.com: split patch] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-12-02ARM: at91/Kconfig: select board files automaticallyArnd Bergmann
An explicit selection option is not needed for board files so now we select the board from SoC option. Signed-off-by: Arnd Bergmann <arnd@arndb.de> [nicolas.ferre@atmel.com: remove option's comments; split patch] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2014-12-02crypto: arm - replace memset by memzero_explicitJulia Lawall
Memset on a local variable may be removed when it is called just before the variable goes out of scope. Using memzero_explicit defeats this optimization. A simplified version of the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier x; type T; @@ { ... when any T x[...]; ... when any when exists - memset + memzero_explicit (x, -0, ...) ... when != x when strict } // </smpl> This change was suggested by Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-12-02crypto: powerpc - replace memset by memzero_explicitJulia Lawall
Memset on a local variable may be removed when it is called just before the variable goes out of scope. Using memzero_explicit defeats this optimization. A simplified version of the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier x; type T; @@ { ... when any T x[...]; ... when any when exists - memset + memzero_explicit (x, -0, ...) ... when != x when strict } // </smpl> This change was suggested by Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Acked-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-12-02crypto: sha - replace memset by memzero_explicitJulia Lawall
Memset on a local variable may be removed when it is called just before the variable goes out of scope. Using memzero_explicit defeats this optimization. A simplified version of the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier x; type T; @@ { ... when any T x[...]; ... when any when exists - memset + memzero_explicit (x, -0, ...) ... when != x when strict } // </smpl> This change was suggested by Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-12-02crypto: sparc - replace memset by memzero_explicitJulia Lawall
Memset on a local variable may be removed when it is called just before the variable goes out of scope. Using memzero_explicit defeats this optimization. A simplified version of the semantic patch that makes this change is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ identifier x; type T; @@ { ... when any T x[...]; ... when any when exists - memset + memzero_explicit (x, -0, ...) ... when != x when strict } // </smpl> This change was suggested by Daniel Borkmann <dborkman@redhat.com> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
2014-12-02powerpc/xmon: Cleanup the breakpoint flagsMichael Ellerman
Drop BP_IABR_TE, which though used, does not do anything useful. Rename BP_IABR to BP_CIABR. Renumber the flags. Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2014-12-02powerpc/xmon: Enable HW instruction breakpoint on POWER8Anshuman Khandual
This patch enables support for hardware instruction breakpoint in xmon on POWER8 platform with the help of a new register called the CIABR (Completed Instruction Address Breakpoint Register). With this patch, a single hardware instruction breakpoint can be added and cleared during any active xmon debug session. The hardware based instruction breakpoint mechanism works correctly with the existing TRAP based instruction breakpoint available on xmon. There are no powerpc CPU with CPU_FTR_IABR feature any more. This patch has re-purposed all the existing IABR related code to work with CIABR register based HW instruction breakpoint. This has one odd feature, which is that when we hit a breakpoint xmon doesn't tell us we have hit the breakpoint. This is because xmon is expecting bp->address == regs->nip. Because CIABR fires on completition regs->nip points to the instruction after the breakpoint. We could fix that, but it would then confuse other parts of the xmon code which think we need to emulate the instruction. [mpe] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
2014-12-02Merge remote-tracking branch 'benh/next' into nextMichael Ellerman
Merge updates collected & acked by Ben. A few EEH patches from Gavin, some mm updates from Aneesh and a few odds and ends.
2014-12-02powerpc/mm/thp: Use tlbiel if possibleAneesh Kumar K.V
If we know that user address space has never executed on other cpus we could use tlbiel. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/mm/thp: Remove code duplicationAneesh Kumar K.V
Rename invalidate_old_hpte to flush_hash_hugepage and use that in other places. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/mm/hugetlb: Sanity check gigantic hugepage countJames Yang
Limit the number of gigantic hugepages specified by the hugepages= parameter to MAX_NUMBER_GPAGES. Signed-off-by: James Yang <James.Yang@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/oprofile: Disable pagefaults during user stack readJiang Lu
A page fault occurred during reading user stack in oprofile backtrace would lead following calltrace: WARNING: at linux/kernel/smp.c:210 Modules linked in: CPU: 5 PID: 736 Comm: sh Tainted: G W 3.14.23-WR7.0.0.0_standard #1 task: c0000000f6208bc0 ti: c00000007c72c000 task.ti: c00000007c72c000 NIP: c0000000000ed6e4 LR: c0000000000ed5b8 CTR: 0000000000000000 REGS: c00000007c72f050 TRAP: 0700 Tainted: G W (3.14.23-WR7.0.0 tandard) MSR: 0000000080021000 <CE,ME> CR: 48222482 XER: 00000000 SOFTE: 0 GPR00: c0000000000ed5b8 c00000007c72f2d0 c0000000010aa048 0000000000000005 GPR04: c000000000fdb820 c00000007c72f410 0000000000000001 0000000000000005 GPR08: c0000000010b5768 c000000000f8a048 0000000000000001 0000000000000000 GPR12: 0000000048222482 c00000000fffe580 0000000022222222 0000000010129664 GPR16: 0000000010143cc0 0000000000000000 0000000044444444 0000000000000000 GPR20: c00000007c7221d8 c0000000f638e3c8 000003f15a20120d 0000000000000001 GPR24: 000000005a20120d c00000007c722000 c00000007cdedda8 00003fffef23b160 GPR28: 0000000000000001 c00000007c72f410 c000000000fdb820 0000000000000006 NIP [c0000000000ed6e4] .smp_call_function_single+0x18c/0x248 LR [c0000000000ed5b8] .smp_call_function_single+0x60/0x248 Call Trace: [c00000007c72f2d0] [c0000000000ed5b8] .smp_call_function_single+0x60/0x248 (unreliable) [c00000007c72f3a0] [c000000000030810] .__flush_tlb_page+0x164/0x1b0 [c00000007c72f460] [c00000000002e054] .ptep_set_access_flags+0xb8/0x168 [c00000007c72f500] [c0000000001ad3d8] .handle_mm_fault+0x4a8/0xbac [c00000007c72f5e0] [c000000000bb3238] .do_page_fault+0x3b8/0x868 [c00000007c72f810] [c00000000001e1d0] storage_fault_common+0x20/0x44 Exception: 301 at .__copy_tofrom_user_base+0x54/0x5b0 LR = .op_powerpc_backtrace+0x190/0x20c [c00000007c72fb00] [c000000000a2ec34] .op_powerpc_backtrace+0x204/0x20c (unreliable) [c00000007c72fbc0] [c000000000a2b5fc] .oprofile_add_ext_sample+0xe8/0x118 [c00000007c72fc70] [c000000000a2eee0] .fsl_emb_handle_interrupt+0x20c/0x27c [c00000007c72fd30] [c000000000a2e440] .op_handle_interrupt+0x44/0x58 [c00000007c72fdb0] [c000000000016d68] .performance_monitor_exception+0x74/0x90 [c00000007c72fe30] [c00000000001d8b4] exc_0x260_common+0xfc/0x100 performance_monitor_exception() is executed in a context with interrupt disabled and preemption enabled. When there is a user space page fault happened, do_page_fault() invoke in_atomic() to decide whether kernel should handle such page fault. in_atomic() only check preempt_count. So need call pagefault_disable() to disable preemption before reading user stack. Signed-off-by: Jiang Lu <lu.jiang@windriver.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02Merge tag 'v3.18-rc7' into drm-nextDave Airlie
This fixes a bunch of conflicts prior to merging i915 tree. Linux 3.18-rc7 Conflicts: drivers/gpu/drm/exynos/exynos_drm_drv.c drivers/gpu/drm/i915/i915_drv.c drivers/gpu/drm/i915/intel_pm.c drivers/gpu/drm/tegra/dc.c
2014-12-02powerpc/mm: Check for matching hpte without taking hpte lockAneesh Kumar K.V
With smaller hash page table config, we would end up in situation where we would be replacing hash page table slot frequently. In such config, we will find the hpte to be not matching, and we can do that check without holding the hpte lock. We need to recheck the hpte again after holding lock. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc: Drop useless warning in eeh_init()Greg Kurz
This is what we get in dmesg when booting a pseries guest and the hypervisor doesn't provide EEH support. [ 0.166655] EEH functionality not supported [ 0.166778] eeh_init: Failed to call platform init function (-22) Since both powernv_eeh_init() and pseries_eeh_init() already complain when hitting an error, it is not needed to print more (especially such an uninformative message). Signed-off-by: Greg Kurz <gkurz@linux.vnet.ibm.com> Acked-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/powernv: Cleanup unused MCE definitions/declarations.Mahesh Salgaonkar
Cleanup OpalMCE_* definitions/declarations and other related code which is not used anymore. Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Acked-by: Benjamin Herrrenschmidt <benh@kernel.crashing.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/eeh: Dump PHB diag-data earlyGavin Shan
On PowerNV platform, PHB diag-data is dumped after stopping device drivers. In case of recursive EEH errors, the kernel is usually crashed before dumping PHB diag-data for the second EEH error. It's hard to locate the root cause of the second EEH error without PHB diag-data. The patch adds one more EEH option "eeh=early_log", which helps dumping PHB diag-data immediately once frozen PE is detected, in order to get the PHB diag-data for the second EEH error. Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2014-12-02powerpc/eeh: Recover EEH error on ownership change for BCM5719Gavin Shan
In PCI passthrou scenario, we need simulate EEH recovery for Emulex adapters when their ownership changes, as we did in commit 5cfb20b96 ("powerpc/eeh: Emulate EEH recovery for VFIO devices"). Broadcom BCM5719 adpaters are facing same problem and needs same cure. Reported-by: Rajeshkumar Subramanian <rajeshkumars@in.ibm.com> Signed-off-by: Gavin Shan <gwshan@linux.vnet.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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