summaryrefslogtreecommitdiff
path: root/arch/arm/include
AgeCommit message (Collapse)Author
2013-11-08arm: make SWIOTLB availableStefano Stabellini
IOMMU_HELPER is needed because SWIOTLB calls iommu_is_span_boundary, provided by lib/iommu_helper.c. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> CC: will.deacon@arm.com Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Changes in v9: - remove uneeded include asm/cacheflush.h; - just return 0 if !dev->dma_mask in dma_capable. Changes in v8: - use __phys_to_pfn and __pfn_to_phys. Changes in v7: - dma_mark_clean: empty implementation; - in dma_capable use coherent_dma_mask if dma_mask hasn't been allocated. Changes in v6: - check for dev->dma_mask being NULL in dma_capable. Changes in v5: - implement dma_mark_clean using dmac_flush_range. Changes in v3: - dma_capable: do not treat dma_mask as a limit; - remove SWIOTLB dependency on NEED_SG_DMA_LENGTH.
2013-11-07arm/arm64: KVM: PSCI: propagate caller endianness to the incoming vcpuMarc Zyngier
When booting a vcpu using PSCI, make sure we start it with the endianness of the caller. Otherwise, secondaries can be pretty unhappy to execute a BE kernel in LE mode... This conforms to PSCI spec Rev B, 5.13.3. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-11-07arm/arm64: KVM: MMIO support for BE guestMarc Zyngier
Do the necessary byteswap when host and guest have different views of the universe. Actually, the only case we need to take care of is when the guest is BE. All the other cases are naturally handled. Also be careful about endianness when the data is being memcopy-ed from/to the run buffer. Acked-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
2013-11-07Merge remote-tracking branch 'grant/devicetree/next' into for-nextRob Herring
2013-11-07ARM: 7872/1: Support arch_irq_work_raise() via self IPIsStephen Boyd
By default, IRQ work is run from the tick interrupt (see irq_work_run() in update_process_times()). When we're in full NOHZ mode, restarting the tick requires the use of IRQ work and if the only place we run IRQ work is in the tick interrupt we have an unbreakable cycle. Implement arch_irq_work_raise() via self IPIs to break this cycle and get the tick started again. Note that we implement this via IPIs which are only available on SMP builds. This shouldn't be a problem because full NOHZ is only supported on SMP builds anyway. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Reviewed-by: Kevin Hilman <khilman@linaro.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-11-01Merge branch 'linus' into sched/coreIngo Molnar
Resolve cherry-picking conflicts: Conflicts: mm/huge_memory.c mm/memory.c mm/mprotect.c See this upstream merge commit for more details: 52469b4fcd4f Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Signed-off-by: Ingo Molnar <mingo@kernel.org>
2013-10-31ARM: 7805/1: mm: change max*pfn to include the physical offset of memorySantosh Shilimkar
Most of the kernel code assumes that max*pfn is maximum pfns because the physical start of memory is expected to be PFN0. Since this assumption is not true on ARM architectures, the meaning of max*pfn is number of memory pages. This is done to keep drivers happy which are making use of of these variable to calculate the dma bounce limit using dma_mask. Now since we have a architecture override possibility for DMAable maximum pfns, lets make meaning of max*pfns as maximum pnfs on ARM as well. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will.deacon@arm.com> Cc: Nicolas Pitre <nicolas.pitre@linaro.org> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-30Merge branch 'baserock/bjdooks/312-rc4/be/core-v3' of ↵Russell King
git://git.baserock.org/delta/linux into devel-stable Conflicts: arch/arm/kernel/head.S This series has been well tested and it would be great to get this merged now. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: fix misplaced arch_virt_to_idmap()Russell King
Olof Johansson reported: In file included from arch/arm/include/asm/page.h:163:0, from include/linux/mm_types.h:16, from include/linux/sched.h:24, from arch/arm/kernel/asm-offsets.c:13: arch/arm/include/asm/memory.h: In function '__virt_to_idmap': arch/arm/include/asm/memory.h:300:6: error: 'arch_virt_to_idmap' undeclared (first use in this function) caused by arch_virt_to_idmap being placed inside a different preprocessor conditional to its user. Move it along side its user. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: 7848/1: mcpm: Implement cpu_kill() to synchronise on powerdownDave Martin
CPU hotplug and kexec rely on smp_ops.cpu_kill(), which is supposed to wait for the CPU to park or power down, and perform the last rites (such as disabling clocks etc., where the platform doesn't do this automatically). kexec in particular is unsafe without performing this synchronisation to park secondaries. Without it, the secondaries might not be parked when kexec trashes the kernel. There is no generic way to do this synchronisation, so a new mcpm platform_ops method power_down_finish() is added by this patch. The new method is mandatory. A platform which provides no way to detect when CPUs are parked is likely broken. Signed-off-by: Dave Martin <Dave.Martin@arm.com> Reviewed-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: 7863/1: Let arm_add_memory() always use 64-bit argumentsMagnus Damm
The DTB and/or the kernel command line may pass 64-bit addresses regardless of kernel configuration, so update arm_add_memory() to take 64-bit arguments independently of the phys_addr_t size. This allows non-wrapping handling of high memory banks such as the second memory bank of APE6EVM (at 0x2_0000_0000) in case of 32-bit phys_addr_t. Signed-off-by: Magnus Damm <damm@opensource.se> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: 7861/1: cacheflush: consolidate single-CPU ARMv7 cache disabling codeNicolas Pitre
This code is becoming duplicated in many places. So let's consolidate it into a handy macro that is known to be right and available for reuse. Signed-off-by: Nicolas Pitre <nico@linaro.org> Acked-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: 7860/1: debug: msm: Add DEBUG_LL support for ARCH_MSM8974Rohit Vaswani
Add debug uart support for MSM8974. This patch adds a Kconfig entry and the base address for the debug uart. Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: 7858/1: mm: make UACCESS_WITH_MEMCPY huge page awareSteven Capper
The memory pinning code in uaccess_with_memcpy.c does not check for HugeTLB or THP pmds, and will enter an infinite loop should a __copy_to_user or __clear_user occur against a huge page. This patch adds detection code for huge pages to pin_page_for_write. As this code can be executed in a fast path it refers to the actual pmds rather than the vma. If a HugeTLB or THP is found (they have the same pmd representation on ARM), the page table spinlock is taken to prevent modification whilst the page is pinned. On ARM, huge pages are only represented as pmds, thus no huge pud checks are performed. (For huge puds one would lock the page table in a similar manner as in the pmd case). Two helper functions are introduced; pmd_thp_or_huge will check whether or not a page is huge or transparent huge (which have the same pmd layout on ARM), and pmd_hugewillfault will detect whether or not a page fault will occur on write to the page. Running the following test (with the chunking from read_zero removed): $ dd if=/dev/zero of=/dev/null bs=10M count=1024 Gave: 2.3 GB/s backed by normal pages, 2.9 GB/s backed by huge pages, 5.1 GB/s backed by huge pages, with page mask=HPAGE_MASK. After some discussion, it was decided not to adopt the HPAGE_MASK, as this would have a significant detrimental effect on the overall system latency due to page_table_lock being held for too long. This could be revisited if split huge page locks are adopted. Signed-off-by: Steve Capper <steve.capper@linaro.org> Reviewed-by: Nicolas Pitre <nico@linaro.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: 7855/1: Add check for Cortex-A15 errata 798181 ECORob Herring
The work-around for A15 errata 798181 is not needed if appropriate ECO fixes have been applied to r3p2 and earlier core revisions. This can be checked by reading REVIDR register bits 4 and 9. If only bit 4 is set, then the IPI broadcast can be skipped. Signed-off-by: Rob Herring <rob.herring@calxeda.com> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: 7854/1: lockref: add support for lockless lockrefs using cmpxchg64Will Deacon
Our spinlocks are only 32-bit (2x16-bit tickets) and, on processors with 64-bit atomic instructions, cmpxchg64 makes use of the double-word exclusive accessors. This patch wires up the cmpxchg-based lockless lockref implementation for ARM. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: 7853/1: cmpxchg: implement cmpxchg64_relaxedWill Deacon
This patch introduces cmpxchg64_relaxed for arm, which performs a 64-bit cmpxchg operation without barrier semantics. cmpxchg64_local is updated to use the new operation. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: 7852/1: cmpxchg: implement barrier-less cmpxchg64_localWill Deacon
Our cmpxchg64 macros are wrappers around atomic64_cmpxchg. Whilst this is great for code re-use, there is a case for barrier-less cmpxchg where it is known to be safe (for example cmpxchg64_local and cmpxchg-based lockrefs). This patch introduces a 64-bit cmpxchg implementation specifically for the cmpxchg64_* macros, so that it can be later used by the lockref code. Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-29ARM: 7850/1: DEBUG_LL on efm32 SoCsUwe Kleine-König
This implements output of debug messages on efm32 SoCs. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-28Merge tag 'omap-for-v3.13/cm-scm-cleanup-signed' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into next/cleanup From Paul Walmsley <paul@pwsan.com> via Tony Lindgren: Move some of the OMAP2+ CM and System Control Module direct register accesses into CM- and System Control Module-specific "drivers" underneath arch/arm/mach-omap2/. This is a prerequisite for moving this code out of arch/arm/mach-omap2/ into drivers/. Basic test logs are available here: http://www.pwsan.com/omap/testlogs/cm_scm_cleanup_a_v3.13/20131019101809/ * tag 'omap-for-v3.13/cm-scm-cleanup-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: OMAP3: control: add API for setting IVA bootmode ARM: OMAP3: CM/control: move CM scratchpad save to CM driver ARM: OMAP3: McBSP: do not access CM register directly ARM: OMAP3: clock: add API to enable/disable autoidle for a single clock ARM: OMAP2: CM/PM: remove direct register accesses outside CM code + Linux 3.12-rc4 Signed-off-by: Olof Johansson <olof@lixom.net>
2013-10-28Merge tag 'imx-soc-3.13' of git://git.linaro.org/people/shawnguo/linux-2.6 ↵Olof Johansson
into next/soc From Shawn Guo: The imx/mxs soc changes for 3.13: * Low-level debug support for Vybrid * Support soc bus/device for imx6 * Suspend support for imx6dl and imx6sl * The imx6q clock updates for PCIe and audio PLL support * IOMUXC GPR update for fec support * Some random cleanup * A few defconfig updates * tag 'imx-soc-3.13' of git://git.linaro.org/people/shawnguo/linux-2.6: (31 commits) ARM: imx: enable suspend for imx6sl ARM: imx: ensure dsm_request signal is not asserted when setting LPM ARM: imx6q: call WB and RBC configuration from imx6q_pm_enter() ARM: imx6q: move low-power code out of clock driver ARM: imx: drop extern with function prototypes in common.h ARM: imx: reset core along with enable/disable operation ARM: imx: do not return from imx_cpu_die() call ARM: imx_v6_v7_defconfig: Select CONFIG_PROVE_LOCKING ARM: imx_v6_v7_defconfig: Enable LEDS_GPIO related options ARM: mxs_defconfig: Turn off CONFIG_DEBUG_GPIO ARM: imx: replace imx6q_restart() with mxc_restart() ARM: mach-imx: mm-imx5: Retrieve iomuxc base address from dt ARM: mach-imx: mm-imx5: Retrieve tzic base address from dt ARM: mach-imx: clk-imx51-imx53: Retrieve base address and irq from dt ARM: mxs_defconfig: Add CHIPIDEA_UDC support ARM: imx: Include linux/err.h ARM: imx_v6_v7_defconfig: Add CHIPIDEA_UDC support ARM: imx_v6_v7_defconfig: Add SPDIF support ARM: imx6q: clock and Kconfig update for PCIe support ARM: imx: Add LVDS general-purpose clocks to i.MX6Q ... Signed-off-by: Olof Johansson <olof@lixom.net>
2013-10-28Merge tag 'kvm-arm-for-3.13-2' of ↵Paolo Bonzini
git://git.linaro.org/people/cdall/linux-kvm-arm into kvm-queue Updates for KVM/ARM, take 2 including: - Transparent Huge Pages and hugetlbfs support for KVM/ARM - Yield CPU when guest executes WFE to speed up CPU overcommit
2013-10-25arm,arm64: do not always merge biovec if we are running on XenStefano Stabellini
This is similar to what it is done on X86: biovecs are prevented from merging otherwise every dma requests would be forced to bounce on the swiotlb buffer. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Changes in v7: - remove the extra autotranslate check in biomerge.c.
2013-10-25xen: introduce xen_dma_map/unmap_page and xen_dma_sync_single_for_cpu/deviceStefano Stabellini
Introduce xen_dma_map_page, xen_dma_unmap_page, xen_dma_sync_single_for_cpu and xen_dma_sync_single_for_device. They have empty implementations on x86 and ia64 but they call the corresponding platform dma_ops function on arm and arm64. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Changes in v9: - xen_dma_map_page return void, avoid page_to_phys.
2013-10-23Merge branch 'for-rmk/prefetch' of ↵Russell King
git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable
2013-10-23Merge branch 'for-rmk/perf' of ↵Russell King
git://git.kernel.org/pub/scm/linux/kernel/git/will/linux into devel-stable
2013-10-22arm/arm64: KVM: PSCI: use MPIDR to identify a target CPUMarc Zyngier
The KVM PSCI code blindly assumes that vcpu_id and MPIDR are the same thing. This is true when vcpus are organized as a flat topology, but is wrong when trying to emulate any other topology (such as A15 clusters). Change the KVM PSCI CPU_ON code to look at the MPIDR instead of the vcpu_id to pick a target CPU. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2013-10-21ARM: imx: add low-level debug for vybridShawn Guo
Add low-level debug support for vybrid, so that earlyprintk can be enabled for debugging early boot issue. Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
2013-10-19Merge tag 'v3.12-rc6' into develLinus Walleij
Linux 3.12-rc6 Conflicts: drivers/gpio/gpio-lynxpoint.c
2013-10-19ARM: tlb: ASID macro should give 32bit result for BE correct operationVictor Kamensky
In order for ASID macro to be used as expression passed to inline asm as 'r' operand it needs to give 32 bit unsigned result, not unsigned 64bit expression. Otherwise when 64bit ASID is passed to inline assembler statement as 'r' operand (32bit) compiler behavior is not well specified. For example when __flush_tlb_mm function compiled in big endian case, and ASID is passed to tlb_op macro directly, 0 will be passed as 'mcr 15, 0, r4, cr8, cr3, {2}' argument in r4, unless ASID macro changed to produce 32 bit result. Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
2013-10-19ARM: atomic64: fix endian-ness in atomic.hVictor Kamensky
Fix inline asm for atomic64_xxx functions in arm atomic.h. Instead of %H operand specifiers code should use %Q for least significant part of the value, and %R for the most significant part of the value. %H always returns the higher of the two register numbers, and therefore it is not endian neutral. %H should be used with ldrexd and strexd instructions. Signed-off-by: Victor Kamensky <victor.kamensky@linaro.org> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
2013-10-19ARM: kdgb: use <asm/opcodes.h> for data to be assembled as intructionBen Dooks
The arch_kgdb_breakpoint() function uses an inline assembly directive to assemble a specific instruction using .word. This means the linker will not treat is as an instruction, and therefore incorrectly swap the endian-ness if running BE8. As noted, this code means that kgdb is really only usable on arm32 kernels, and should be made dependant on not being a thumb2 kernel until fixed. However this is not something to be added to this patch. Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Reviewed-by: Dave Martin <Dave.Martin@arm.com>
2013-10-19ARM: Correct BUG() assembly to ensure it is endian-agnosticBen Dooks
Currently BUG() uses .word or .hword to create the necessary illegal instructions. However if we are building BE8 then these get swapped by the linker into different illegal instructions in the text. This means that the BUG() macro does not get trapped properly. Change to using <asm/opcodes.h> to provide the necessary ARM instruction building as we cannot rely on gcc/gas having the `.inst` instructions which where added to try and resolve this issue (reported by Dave Martin <Dave.Martin@arm.com>). Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk> Reviewed-by: Dave Martin <Dave.Martin@arm.com>
2013-10-19ARM: hardware: fix endian-ness in <hardware/coresight.h>Ben Dooks
The <hardware/coresight.h> needs to take into account the endian-ness of the processor when reading and writing data, so change to using the readl/writel relaxed variants from the raw ones. Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
2013-10-19ARM: pl01x debug code endian fixBen Dooks
The PL01X debug code needs to take into account which endian mode the processor is running in. If it is big-endian, ensure the data is swapped appropriately. Note, we could do this slightly more efficiently if we have an macro to do the necessary swap for the bits used by test. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
2013-10-19ARM: asm: Add ARM_BE8() assembly helperBen Dooks
Add ARM_BE8() helper to wrap any code conditional on being compile when CONFIG_ARM_ENDIAN_BE8 is selected and convert existing places where this is to use it. Acked-by: Nicolas Pitre <nico@linaro.org> Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Ben Dooks <ben.dooks@codethink.co.uk>
2013-10-18Merge branch 'for-rmk/arm-mm-lpae' of ↵Russell King
git://git.kernel.org/pub/scm/linux/kernel/git/ssantosh/linux-keystone into devel-stable This series extends the existing ARM v2p runtime patching for 64 bit. Needed for LPAE machines which have physical memory beyond 4GB.
2013-10-17KVM: ARM: Support hugetlbfs backed huge pagesChristoffer Dall
Support huge pages in KVM/ARM and KVM/ARM64. The pud_huge checking on the unmap path may feel a bit silly as the pud_huge check is always defined to false, but the compiler should be smart about this. Note: This deals only with VMAs marked as huge which are allocated by users through hugetlbfs only. Transparent huge pages can only be detected by looking at the underlying pages (or the page tables themselves) and this patch so far simply maps these on a page-by-page level in the Stage-2 page tables. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2013-10-17KVM: ARM: Update comments for kvm_handle_wfiChristoffer Dall
Update comments to reflect what is really going on and add the TWE bit to the comments in kvm_arm.h. Also renames the function to kvm_handle_wfx like is done on arm64 for consistency and uber-correctness. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2013-10-17ARM: KVM: Yield CPU when vcpu executes a WFEMarc Zyngier
On an (even slightly) oversubscribed system, spinlocks are quickly becoming a bottleneck, as some vcpus are spinning, waiting for a lock to be released, while the vcpu holding the lock may not be running at all. This creates contention, and the observed slowdown is 40x for hackbench. No, this isn't a typo. The solution is to trap blocking WFEs and tell KVM that we're now spinning. This ensures that other vpus will get a scheduling boost, allowing the lock to be released more quickly. Also, using CONFIG_HAVE_KVM_CPU_RELAX_INTERCEPT slightly improves the performance when the VM is severely overcommited. Quick test to estimate the performance: hackbench 1 process 1000 2xA15 host (baseline): 1.843s 2xA15 guest w/o patch: 2.083s 4xA15 guest w/o patch: 80.212s 8xA15 guest w/o patch: Could not be bothered to find out 2xA15 guest w/ patch: 2.102s 4xA15 guest w/ patch: 3.205s 8xA15 guest w/ patch: 6.887s So we go from a 40x degradation to 1.5x in the 2x overcommit case, which is vaguely more acceptable. Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2013-10-17Powerpc KVM work is based on a commit after rc4.Gleb Natapov
Merging master into next to satisfy the dependencies. Conflicts: arch/arm/kvm/reset.c
2013-10-16Merge tag 'kvm-arm-for-3.13-1' of ↵Gleb Natapov
git://git.linaro.org/people/cdall/linux-kvm-arm into next Updates for KVM/ARM including cpu=host and Cortex-A7 support
2013-10-16Merge tag 'v3.12-rc4' into develLinus Walleij
Linux 3.12-rc4
2013-10-14Merge branch 'fixes' of git://git.linaro.org/people/rmk/linux-armLinus Torvalds
Pull ARM fixes from Russell King: "Some more ARM fixes, nothing particularly major here. The biggest change is to fix the SMP_ON_UP code so that it works with TI's Aegis cores" * 'fixes' of git://git.linaro.org/people/rmk/linux-arm: ARM: 7851/1: check for number of arguments in syscall_get/set_arguments() ARM: 7846/1: Update SMP_ON_UP code to detect A9MPCore with 1 CPU devices ARM: 7845/1: sharpsl_param.c: fix invalid memory access for pxa devices ARM: 7843/1: drop asm/types.h from generic-y ARM: 7842/1: MCPM: don't explode if invoked without being initialized first
2013-10-14KVM: ARM: Get rid of KVM_HPAGE definesChristoffer Dall
The KVM_HPAGE_DEFINES are a little artificial on ARM, since the huge page size is statically defined at compile time and there is only a single huge page size. Now when the main kvm code relying on these defines has been moved to the x86 specific part of the world, we can get rid of these. Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org> Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-10-13ARM: 7851/1: check for number of arguments in syscall_get/set_arguments()AKASHI Takahiro
In ftrace_syscall_enter(), syscall_get_arguments(..., 0, n, ...) if (i == 0) { <handle ORIG_r0> ...; n--;} memcpy(..., n * sizeof(args[0])); If 'number of arguments(n)' is zero and 'argument index(i)' is also zero in syscall_get_arguments(), none of arguments should be copied by memcpy(). Otherwise 'n--' can be a big positive number and unexpected amount of data will be copied. Tracing system calls which take no argument, say sync(void), may hit this case and eventually make the system corrupted. This patch fixes the issue both in syscall_get_arguments() and syscall_set_arguments(). Cc: <stable@vger.kernel.org> Acked-by: Will Deacon <will.deacon@arm.com> Signed-off-by: AKASHI Takahiro <takahiro.akashi@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2013-10-12KVM: ARM: Add support for Cortex-A7Jonathan Austin
This patch adds support for running Cortex-A7 guests on Cortex-A7 hosts. As Cortex-A7 is architecturally compatible with A15, this patch is largely just generalising existing code. Areas where 'implementation defined' behaviour is identical for A7 and A15 is moved to allow it to be used by both cores. The check to ensure that coprocessor register tables are sorted correctly is also moved in to 'common' code to avoid each new cpu doing its own check (and possibly forgetting to do so!) Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2013-10-12KVM: ARM: fix the size of TTBCR_{T0SZ,T1SZ} masksJonathan Austin
The T{0,1}SZ fields of TTBCR are 3 bits wide when using the long descriptor format. Likewise, the T0SZ field of the HTCR is 3-bits. KVM currently defines TTBCR_T{0,1}SZ as 3, not 7. The T0SZ mask is used to calculate the value for the HTCR, both to pick out TTBCR.T0SZ and mask off the equivalent field in the HTCR during read-modify-write. The incorrect mask size causes the (UNKNOWN) reset value of HTCR.T0SZ to leak in to the calculated HTCR value. Linux will hang when initializing KVM if HTCR's reset value has bit 2 set (sometimes the case on A7/TC2) Fixing T0SZ allows A7 cores to boot and T1SZ is also fixed for completeness. Signed-off-by: Jonathan Austin <jonathan.austin@arm.com> Acked-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <christoffer.dall@linaro.org>
2013-10-11ARM: Remove temporary sched_clock.h headerStephen Boyd
This header file is no longer needed now that the ARM sched_clock framework is generic and all users have moved to linux/sched_clock.h instead of asm/sched_clock.h. Remove it. Signed-off-by: Stephen Boyd <sboyd@codeaurora.org> Signed-off-by: Kevin Hilman <khilman@linaro.org>
2013-10-11Merge branch 'core/urgent' into sched/coreIngo Molnar
Merge in asm goto fix, to be able to apply the asm/rmwcc.h fix. Signed-off-by: Ingo Molnar <mingo@kernel.org>