- 20 12月, 2013 18 次提交
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由 Laura Abbott 提交于
arm64 bit targets need the features CMA provides. Add the appropriate hooks, header files, and Kconfig to allow this to happen. Cc: Will Deacon <will.deacon@arm.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: NLaura Abbott <lauraa@codeaurora.org> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Laura Abbott 提交于
Although parts of the DMA apis may properly check for NULL devices, there may be some places that don't. Rather than fix up all the possible locations, just require a non-NULL device structure to be used for allocating/freeing. Cc: Will Deacon <will.deacon@arm.com> Cc: Marek Szyprowski <m.szyprowski@samsung.com> Signed-off-by: NLaura Abbott <lauraa@codeaurora.org> [catalin.marinas@arm.com: s/WARN/WARN_ONCE/] Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Steve Capper 提交于
Advertise the optional cryptographic and CRC32 instructions to user space where present. Several hwcap bits [3-7] are allocated. Signed-off-by: NSteve Capper <steve.capper@linaro.org> [bit 2 is taken now so use bits 3-7 instead] Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Ard Biesheuvel 提交于
asm/cputype.h contains a bunch of #defines for CPU id registers that essentially map to themselves. Remove the #defines and pass the tokens directly to the inline asm() that reads the registers. Signed-off-by: NArd Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Liviu Dudau 提交于
Code referenced in the comment has moved to arch/arm64/kernel/cputable.c Signed-off-by: NLiviu Dudau <Liviu.Dudau@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Mark Hambleton 提交于
Make sure the value we are going to return is referenced in order to avoid warnings from newer GCCs such as: arch/arm64/include/asm/cmpxchg.h:162:3: warning: value computed is not used [-Wunused-value] ((__typeof__(*(ptr)))__cmpxchg_mb((ptr), \ ^ net/netfilter/nf_conntrack_core.c:674:2: note: in expansion of macro ‘cmpxchg’ cmpxchg(&nf_conntrack_hash_rnd, 0, rand); [Modified to use the current underlying implementation as current mainline for both cmpxchg() and cmpxchg_local() does -- broonie] Signed-off-by: NMark Hambleton <mahamble@broadcom.com> Signed-off-by: NMark Brown <broonie@linaro.org> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Sandeepa Prabhu 提交于
AArch64 Single Steping and Breakpoint debug exceptions will be used by multiple debug framworks like kprobes & kgdb. This patch implements the hooks for those frameworks to register their own handlers for handling breakpoint and single step events. Reworked the debug exception handler in entry.S: do_dbg to route software breakpoint (BRK64) exception to do_debug_exception() Signed-off-by: NSandeepa Prabhu <sandeepa.prabhu@linaro.org> Signed-off-by: NDeepak Saxena <dsaxena@linaro.org> Acked-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Konstantin Khlebnikov 提交于
We need at least 24 bytes above frame pointer. Signed-off-by: NKonstantin Khlebnikov <k.khlebnikov@samsung.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Konstantin Khlebnikov 提交于
get_wchan() is lockless. Task may wakeup at any time and change its own stack, thus each next stack frame may be overwritten and filled with random stuff. Signed-off-by: NKonstantin Khlebnikov <k.khlebnikov@samsung.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Will Deacon 提交于
ARMv8 CPUs can perform efficient unaligned memory accesses in hardware and this feature is relied up on by code such as the dcache word-at-a-time name hashing. This patch selects HAVE_EFFICIENT_UNALIGNED_ACCESS for arm64. Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Will Deacon 提交于
DCACHE_WORD_ACCESS uses the word-at-a-time API for optimised string comparisons in the vfs layer. This patch implements support for load_unaligned_zeropad in much the same way as has been done for ARM, although big-endian systems are also supported. Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Will Deacon 提交于
AArch64 instructions must be 4-byte aligned, so make sure this is true for the futex .fixup section. Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Will Deacon 提交于
This patch implements the word-at-a-time interface for arm64 using the same algorithm as ARM. We use the fls64 macro, which expands to a clz instruction via a compiler builtin. Big-endian configurations make use of the implementation from asm-generic. With this implemented, we can replace our byte-at-a-time strnlen_user and strncpy_from_user functions with the optimised generic versions. Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Will Deacon 提交于
This patch implements optimised percpu variable accesses using the el1 r/w thread register (tpidr_el1) along the same lines as arch/arm/. Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Vinayak Kale 提交于
Add support for irq registration when pmu interrupt is percpu. Signed-off-by: NVinayak Kale <vkale@apm.com> Signed-off-by: NTuan Phan <tphan@apm.com> [will: tidied up cross-calling to pass &irq] Signed-off-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Mark Rutland 提交于
We currently try to emit .comment twice, once in STABS_DEBUG, and once in the line immediately following it. As the two section definitions are identical, the latter is redundant and can be dropped. This patch drops the redundant .comment section definition. Signed-off-by: NMark Rutland <mark.rutland@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Mark Hambleton 提交于
Describe the virtio device so we can mount disk images in the simulator. [Reduced the size of the region based on feedback from review -- broonie] Signed-off-by: NMark Hambleton <mahamble@broadcom.com> Signed-off-by: NMark Brown <broonie@linaro.org> Acked-by: NWill Deacon <will.deacon@arm.com> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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由 Laura Abbott 提交于
The definition of virt_addr_valid is that virt_addr_valid should return true if and only if virt_to_page returns a valid pointer. The current definition of virt_addr_valid only checks against the virtual address range. There's no guarantee that just because a virtual address falls bewteen PAGE_OFFSET and high_memory the associated physical memory has a valid backing struct page. Follow the example of other architectures and convert to pfn_valid to verify that the virtual address is actually valid. Cc: Will Deacon <will.deacon@arm.com> Cc: Nicolas Pitre <nico@linaro.org> Signed-off-by: NLaura Abbott <lauraa@codeaurora.org> Signed-off-by: NCatalin Marinas <catalin.marinas@arm.com>
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- 14 12月, 2013 1 次提交
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由 Russell King 提交于
Jason Gunthorpe reports a build failure when ARM_PATCH_PHYS_VIRT is not defined: 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_phys': arch/arm/include/asm/memory.h:244:40: error: 'PHYS_OFFSET' undeclared (first use in this function) arch/arm/include/asm/memory.h:244:40: note: each undeclared identifier is reported only once for each function it appears in arch/arm/include/asm/memory.h: In function '__phys_to_virt': arch/arm/include/asm/memory.h:249:13: error: 'PHYS_OFFSET' undeclared (first use in this function) Fixes: ca5a45c0 ("ARM: mm: use phys_addr_t appropriately in p2v and v2p conversions") Tested-By: NJason Gunthorpe <jgunthorpe@obsidianresearch.com> Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
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- 13 12月, 2013 3 次提交
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由 Gleb Natapov 提交于
A guest can cause a BUG_ON() leading to a host kernel crash. When the guest writes to the ICR to request an IPI, while in x2apic mode the following things happen, the destination is read from ICR2, which is a register that the guest can control. kvm_irq_delivery_to_apic_fast uses the high 16 bits of ICR2 as the cluster id. A BUG_ON is triggered, which is a protection against accessing map->logical_map with an out-of-bounds access and manages to avoid that anything really unsafe occurs. The logic in the code is correct from real HW point of view. The problem is that KVM supports only one cluster with ID 0 in clustered mode, but the code that has the bug does not take this into account. Reported-by: NLars Bull <larsbull@google.com> Cc: stable@vger.kernel.org Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Andy Honig 提交于
In kvm_lapic_sync_from_vapic and kvm_lapic_sync_to_vapic there is the potential to corrupt kernel memory if userspace provides an address that is at the end of a page. This patches concerts those functions to use kvm_write_guest_cached and kvm_read_guest_cached. It also checks the vapic_address specified by userspace during ioctl processing and returns an error to userspace if the address is not a valid GPA. This is generally not guest triggerable, because the required write is done by firmware that runs before the guest. Also, it only affects AMD processors and oldish Intel that do not have the FlexPriority feature (unless you disable FlexPriority, of course; then newer processors are also affected). Fixes: b93463aa ('KVM: Accelerated apic support') Reported-by: NAndrew Honig <ahonig@google.com> Cc: stable@vger.kernel.org Signed-off-by: NAndrew Honig <ahonig@google.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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由 Andy Honig 提交于
Under guest controllable circumstances apic_get_tmcct will execute a divide by zero and cause a crash. If the guest cpuid support tsc deadline timers and performs the following sequence of requests the host will crash. - Set the mode to periodic - Set the TMICT to 0 - Set the mode bits to 11 (neither periodic, nor one shot, nor tsc deadline) - Set the TMICT to non-zero. Then the lapic_timer.period will be 0, but the TMICT will not be. If the guest then reads from the TMCCT then the host will perform a divide by 0. This patch ensures that if the lapic_timer.period is 0, then the division does not occur. Reported-by: NAndrew Honig <ahonig@google.com> Cc: stable@vger.kernel.org Signed-off-by: NAndrew Honig <ahonig@google.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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- 12 12月, 2013 5 次提交
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由 Maxime Ripard 提交于
The Allwinner A31 uses the ARM GIC as its internal interrupts controller. The GIC can work on several interrupt triggers, and the A31 was actually setting it up to use a rising edge as a trigger, while it was actually a level high trigger, leading to some interrupts that would be completely ignored if the edge was missed. Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com> Acked-by: NHans de Goede <hdegoede@redhat.com> Cc: stable@vger.kernel.org # 3.12+ Signed-off-by: NOlof Johansson <olof@lixom.net>
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由 Maxime Ripard 提交于
The Allwinner A20 uses the ARM GIC as its internal interrupts controller. The GIC can work on several interrupt triggers, and the A20 was actually setting it up to use a rising edge as a trigger, while it was actually a level high trigger, leading to some interrupts that would be completely ignored if the edge was missed. Signed-off-by: NMaxime Ripard <maxime.ripard@free-electrons.com> Acked-by: NHans de Goede <hdegoede@redhat.com> Cc: stable@vger.kernel.org #3.12+ Signed-off-by: NOlof Johansson <olof@lixom.net>
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由 Stephen Warren 提交于
Add a missing break to the switch in tegra_init_fuse() which determines which SoC the code is running on. This prevents the Tegra30+ fuse handling code from running on Tegra20. Fixes: 3bd1ae57 ("ARM: tegra: add fuses as device randomness") Signed-off-by: NStephen Warren <swarren@nvidia.com> Signed-off-by: NOlof Johansson <olof@lixom.net>
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由 Sergei Ianovich 提交于
Erratum 71 of PXA270M Processor Family Specification Update (April 19, 2010) explains that watchdog reset time is just 8us insead of 10ms in EMTS. If SDRAM is not reset, it causes memory bus congestion and the device hangs. We put SDRAM in selfresh mode before watchdog reset, removing potential freezes. Without this patch PXA270-based ICP DAS LP-8x4x hangs after up to 40 reboots. With this patch it has successfully rebooted 500 times. Signed-off-by: NSergei Ianovich <ynvich@gmail.com> Tested-by: NMarek Vasut <marex@denx.de> Signed-off-by: NHaojian Zhuang <haojian.zhuang@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: NOlof Johansson <olof@lixom.net>
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由 Dmitry Eremin-Solenikov 提交于
When converting from tosa-keyboard driver to matrix keyboard, tosa keys received extra 1 column shift. Replace that with correct values to make keyboard work again. Fixes: f69a6548 ('[ARM] pxa/tosa: make use of the matrix keypad driver') Signed-off-by: NDmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: NHaojian Zhuang <haojian.zhuang@gmail.com> Cc: stable@vger.kernel.org Signed-off-by: NOlof Johansson <olof@lixom.net>
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- 11 12月, 2013 2 次提交
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由 Matthew Garrett 提交于
UEFI time services are often broken once we're in virtual mode. We were already refusing to use them on 64-bit systems, but it turns out that they're also broken on some 32-bit firmware, including the Dell Venue. Disable them for now, we can revisit once we have the 1:1 mappings code incorporated. Signed-off-by: NMatthew Garrett <matthew.garrett@nebula.com> Link: http://lkml.kernel.org/r/1385754283-2464-1-git-send-email-matthew.garrett@nebula.com Cc: <stable@vger.kernel.org> Cc: Matt Fleming <matt.fleming@intel.com> Signed-off-by: NH. Peter Anvin <hpa@linux.intel.com>
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由 Nishanth Menon 提交于
Due to the cross dependencies between hwmod for automanaged device information for OMAP and dts node definitions, we can run into scenarios where the dts node is defined, however it's hwmod entry is yet to be added. In these cases: a) omap_device does not register a pm_domain (since it cannot find hwmod entry). b) driver does not know about (a), does a pm_runtime_get_sync which never fails c) It then tries to do some operation on the device (such as read the revision register (as part of probe) without clock or adequate OMAP generic PM operation performed for enabling the module. This causes a crash such as that reported in: https://bugzilla.kernel.org/show_bug.cgi?id=66441 When 'ti,hwmod' is provided in dt node, it is expected that the device will not function without the OMAP's power automanagement. Hence, when we hit a fail condition (due to hwmod entries not present or other similar scenario), fail at pm_domain level due to lack of data, provide enough information for it to be fixed, however, it allows for the driver to take appropriate measures to prevent crash. Reported-by: NTobias Jakobi <tjakobi@math.uni-bielefeld.de> Signed-off-by: NNishanth Menon <nm@ti.com> Acked-by: NKevin Hilman <khilman@linaro.org> Acked-by: NTony Lindgren <tony@atomide.com> Signed-off-by: NKevin Hilman <khilman@linaro.org>
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- 10 12月, 2013 11 次提交
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由 cpw 提交于
The SGI UV tlb shootdown code panics the system with a NULL pointer deference if 'nobau' is specified on the boot commandline. uv_flush_tlb_other() gets called for every flush, whether the BAU is disabled or not. It should not be keeping the s_enters statistic while the BAU is disabled. The panic occurs because during initialization init_per_cpu_tunables() does not set the bcp->statp pointer if 'nobau' was specified. Signed-off-by: NCliff Wickman <cpw@sgi.com> Cc: <stable@vger.kernel.org> # 3.12.x Link: http://lkml.kernel.org/r/E1VnzBi-0005yF-MU@eag09.americas.sgi.comSigned-off-by: NIngo Molnar <mingo@kernel.org>
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由 Paul Walmsley 提交于
Treat both negative and zero return values from clk_round_rate() as errors. This is needed since subsequent patches will convert clk_round_rate()'s return value to be an unsigned type, rather than a signed type, since some clock sources can generate rates higher than (2^31)-1 Hz. Eventually, when calling clk_round_rate(), only a return value of zero will be considered a error. All other values will be considered valid rates. The comparison against values less than 0 is kept to preserve the correct behavior in the meantime. Signed-off-by: NPaul Walmsley <paul@pwsan.com> Cc: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: Håvard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: NHans-Christian Egtvedt <egtvedt@samfundet.no>
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由 Michael Opdenacker 提交于
This patch proposes to remove the use of the IRQF_DISABLED flag It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: NMichael Opdenacker <michael.opdenacker@free-electrons.com> Acked-by: NHans-Christian Egtvedt <egtvedt@samfundet.no>
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由 Matthias Brugger 提交于
The power management has a section mismatch which leads to the following warning during compilation: WARNING: arch/avr32/mach-at32ap/built-in.o(.text+0x16d4): Section mismatch in reference from the function avr32_pm_offset() to the function .init.text:pm_exception() The function avr32_pm_offset() references the function __init pm_exception(). Signed-off-by: NMatthias Brugger <matthias.bgg@gmail.com> Acked-by: NHans-Christian Egtvedt <hegtvedt@cisco.com>
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由 Eunbong Song 提交于
This patch removes CONFIG_MTD_PARTITIONS in config files for avr32. Because CONFIG_MTD_PARTITIONS was removed by commit 6a8a98b2. Signed-off-by: NEunbong Song <eunb.song@samsung.com> Acked-by: NHans-Christian Egtvedt <hegtvedt@cisco.com>
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由 Mahesh Salgaonkar 提交于
The current logic sets the kdump base to min of 2G or ppc64_rma_size/2. On PowerNV kernel the first memory block 'memory@0' can be very large, equal to the DIMM size with ppc64_rma_size value capped to 1G. Hence on PowerNV, kdump base is set to 512M resulting kdump to fail while allocating paca array. This is because, paca need its memory from RMA region capped at 256M (see allocate_pacas()). This patch lowers the kdump base cap to 128M so that kdump kernel can successfully get memory below 256M for paca allocation. Signed-off-by: NMahesh Salgaonkar <mahesh@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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I have recently found out that no iommu_groups could be found under /sys/ on a P8. That prevents PCI passthrough from working. During my investigation, I found out there seems to be a missing iommu_register_group for PHB3. The following patch seems to fix the problem. After applying it, I see iommu_groups under /sys/kernel/iommu_groups/, and can also bind vfio-pci to an adapter, which gives me a device at /dev/vfio/. Signed-off-by: NThadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Anatolij Gustschin 提交于
The bestcomm driver has been moved to drivers/dma, so to select this driver by default additionally CONFIG_DMADEVICES has to be enabled. Currently it is not enabled in the config despite existing CONFIG_PPC_BESTCOMM=y in the config files. Fix it. Signed-off-by: NAnatolij Gustschin <agust@denx.de> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Olof Johansson 提交于
At least some distros expect it these days; turn it on. Also, random churn from doing a savedefconfig for the first time in a year or so. Signed-off-by: NOlof Johansson <olof@lixom.net> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Hong H. Pham 提交于
In pte_alloc_one(), pgtable_page_ctor() is passed an address that has not been converted by page_address() to the newly allocated PTE page. When the PTE is freed, __pte_free_tlb() calls pgtable_page_dtor() with an address to the PTE page that has been converted by page_address(). The mismatch in the PTE's page address causes pgtable_page_dtor() to access invalid memory, so resources for that PTE (such as the page lock) is not properly cleaned up. On PPC32, only SMP kernels are affected. On PPC64, only SMP kernels with 4K page size are affected. This bug was introduced by commit d614bb04 "powerpc: Move the pte free routines from common header". On a preempt-rt kernel, a spinlock is dynamically allocated for each PTE in pgtable_page_ctor(). When the PTE is freed, calling pgtable_page_dtor() with a mismatched page address causes a memory leak, as the pointer to the PTE's spinlock is bogus. On mainline, there isn't any immediately obvious symptoms, but the problem still exists here. Fixes: d614bb04 "powerpc: Move the pte free routes from common header" Cc: Paul Mackerras <paulus@samba.org> Cc: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: linux-stable <stable@vger.kernel.org> # v3.10+ Signed-off-by: NHong H. Pham <hong.pham@windriver.com> Reviewed-by: NAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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由 Ilia Mirkin 提交于
Allocate enough memory for the ocm_block structure, not just a pointer to it. Signed-off-by: NIlia Mirkin <imirkin@alum.mit.edu> Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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