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2013-12-13xen/block: Correctly define structures in public headers on ARM32 and ARM64Julien Grall
On ARM (32 bits and 64 bits), the double-word is 8-bytes aligned. This will result on different structure from Xen and Linux repositories. As Linux is using __packed__ attribute, it must have a 4-bytes padding before each "id" field. This change breaks guest block support with older kernel. IMHO, it's acceptable because Xen on ARM is still on Tech Preview and the hypercall ABI is not yet freezed. Only one architecture (x86_32) doesn't have 64-bit ABI for the block interface. Don't add padding if Linux is compiled for this architecture. Signed-off-by: Julien Grall <julien.grall@linaro.org> Acked-by: Roger Pau Monne <roger.pau@citrix.com> Acked-by: David Vrabel <david.vrabel@citrix.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Ian Campbell <ian.campbell@citrix.com> Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> [I had asked for confirmation that it did not break x86 and Ian went beyound the call of duty to confirm it. Also a internal regression bucket with 32/64 dom0 with 32/64 domU (PV and HVM) confirmed no regressions. ABI changes are a drag..] Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-12-11arm: xen: foreign mapping PTEs are special.Ian Campbell
These mappings are in fact special and require special handling in privcmd, which already exists. Failure to mark the PTE as special on arm64 causes all sorts of bad PTE fun. e.g. e.g.: BUG: Bad page map in process xl pte:e0004077b33f53 pmd:4079575003 page:ffffffbce1a2f328 count:1 mapcount:-1 mapping: (null) index:0x0 page flags: 0x4000000000000014(referenced|dirty) addr:0000007fb5259000 vm_flags:040644fa anon_vma: (null) mapping:ffffffc03a6fda58 index:0 vma->vm_ops->fault: privcmd_fault+0x0/0x38 vma->vm_file->f_op->mmap: privcmd_mmap+0x0/0x2c CPU: 0 PID: 2657 Comm: xl Not tainted 3.12.0+ #102 Call trace: [<ffffffc0000880f8>] dump_backtrace+0x0/0x12c [<ffffffc000088238>] show_stack+0x14/0x1c [<ffffffc0004b67e0>] dump_stack+0x70/0x90 [<ffffffc000125690>] print_bad_pte+0x12c/0x1bc [<ffffffc0001268f4>] unmap_single_vma+0x4cc/0x700 [<ffffffc0001273b4>] unmap_vmas+0x68/0xb4 [<ffffffc00012c050>] unmap_region+0xcc/0x1d4 [<ffffffc00012df20>] do_munmap+0x218/0x314 [<ffffffc00012e060>] vm_munmap+0x44/0x64 [<ffffffc00012ed78>] SyS_munmap+0x24/0x34 Where unmap_single_vma contains inlined -> unmap_page_range -> zap_pud_range -> zap_pmd_range -> zap_pte_range -> print_bad_pte. Or: BUG: Bad page state in process xl pfn:4077b4d page:ffffffbce1a2f8d8 count:0 mapcount:-1 mapping: (null) index:0x0 page flags: 0x4000000000000014(referenced|dirty) Modules linked in: CPU: 0 PID: 2657 Comm: xl Tainted: G B 3.12.0+ #102 Call trace: [<ffffffc0000880f8>] dump_backtrace+0x0/0x12c [<ffffffc000088238>] show_stack+0x14/0x1c [<ffffffc0004b67e0>] dump_stack+0x70/0x90 [<ffffffc00010f798>] bad_page+0xc4/0x110 [<ffffffc00010f8b4>] free_pages_prepare+0xd0/0xd8 [<ffffffc000110e94>] free_hot_cold_page+0x28/0x178 [<ffffffc000111460>] free_hot_cold_page_list+0x38/0x60 [<ffffffc000114cf0>] release_pages+0x190/0x1dc [<ffffffc00012c0e0>] unmap_region+0x15c/0x1d4 [<ffffffc00012df20>] do_munmap+0x218/0x314 [<ffffffc00012e060>] vm_munmap+0x44/0x64 [<ffffffc00012ed78>] SyS_munmap+0x24/0x34 x86 already gets this correct. 32-bit arm gets away with this because there is not PTE_SPECIAL bit in the PTE there and the vm_normal_page fallback path does the right thing. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2013-12-11xen/arm64: do not call the swiotlb functions twiceStefano Stabellini
On arm64 the dma_map_ops implementation is based on the swiotlb. swiotlb-xen, used by default in dom0 on Xen, is also based on the swiotlb. Avoid calling into the default arm64 dma_map_ops functions from xen_dma_map_page, xen_dma_unmap_page, xen_dma_sync_single_for_cpu, and xen_dma_sync_single_for_device otherwise we end up calling into the swiotlb twice. When arm64 gets a non-swiotlb based implementation of dma_map_ops, we'll probably have to reintroduce dma_map_ops calls in page-coherent.h. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> CC: catalin.marinas@arm.com CC: Will.Deacon@arm.com CC: Ian.Campbell@citrix.com
2013-12-06xen: privcmd: do not return pages which we have failed to unmapIan Campbell
This failure represents a hypervisor issue, but if it does occur then nothing good can come of returning pages which still refer to a foreign owned page into the general allocation pool. Instead we are forced to leak them. Log that we have done so. The potential for failure only exists for autotranslated guest (e.g. ARM and x86 PVH). Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com>
2013-12-04XEN: Grant table address, xen_hvm_resume_frames, is a phys_addr not a pfnEric Trudeau
From: Eric Trudeau <etrudeau@broadcom.com> xen_hvm_resume_frames stores the physical address of the grant table. englighten.c was incorrectly setting it as if it was a page frame number. This caused the table to be mapped into the guest at an unexpected physical address. Additionally, a warning is improved to include the grant table address which failed in xen_remap. Signed-off-by: Eric Trudeau <etrudeau@broadcom.com> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2013-11-26xen/gnttab: leave lazy MMU mode in the case of a m2p override failureMatt Wilson
Commit f62805f1 introduced a bug where lazy MMU mode isn't exited if a m2p_add/remove_override call fails. Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: David Vrabel <david.vrabel@citrix.com> Reviewed-by: Anthony Liguori <aliguori@amazon.com> Cc: xen-devel@lists.xenproject.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Matt Wilson <msw@amazon.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> CC: stable@vger.kernel.org
2013-11-18xen/arm: p2m_init and p2m_lock should be staticStefano Stabellini
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2013-11-18arm/xen: Export phys_to_mach to fix Xen module link errorsJosh Boyer
Various xen drivers fail to link when built as modules with the following error: ERROR: "phys_to_mach" [drivers/xen/xen-gntalloc.ko] undefined! ERROR: "phys_to_mach" [drivers/net/xen-netfront.ko] undefined! ERROR: "phys_to_mach" [drivers/net/xen-netback/xen-netback.ko] undefined! ERROR: "phys_to_mach" [drivers/block/xen-blkfront.ko] undefined! The mfn_to_pfn and pfn_to_mfn functions get inlined in these modules and those functions require phys_to_mach. Export the symbol to fix the link errors. Signed-off-by: Josh Boyer <jwboyer@fedoraproject.org> Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2013-11-15swiotlb-xen: add missing xen_dma_map_page callStefano Stabellini
swiotlb-xen is missing a xen_dma_map_page call in xen_swiotlb_map_sg_attrs, in the bounce buffer path. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-11-11xen/arm: pfn_to_mfn and mfn_to_pfn return the argument if nothing is in the p2mStefano Stabellini
Some common Xen drivers, like balloon.c, call pfn_to_mfn and mfn_to_pfn even for autotranslate guests, expecting the argument back. The following commit broke these drivers by changing the behavior of pfn_to_mfn and mfn_to_pfn: commit 4a19138c6505e224d9f4cc2fe9ada9188d7100ea Author: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Date: Thu Oct 17 16:22:27 2013 +0000 arm/xen,arm64/xen: introduce p2m They now return INVALID_P2M_ENTRY if Linux doesn't actually know what is the mfn backing a pfn or what is the pfn corresponding to an mfn. Fix the regression by switching to the old behavior. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Acked-by: Ian Campbell <ian.campbell@citrix.com> Tested-by: Ian Campbell <ian.campbell@citrix.com>
2013-11-08arm,arm64/include/asm/io.h: define struct bio_vecStefano Stabellini
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Olof Johansson <olof@lixom.net> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-11-08Merge remote-tracking branch 'stefano/swiotlb-xen-9.1' into ↵Konrad Rzeszutek Wilk
stable/for-linus-3.13 * stefano/swiotlb-xen-9.1: swiotlb-xen: fix error code returned by xen_swiotlb_map_sg_attrs swiotlb-xen: static inline xen_phys_to_bus, xen_bus_to_phys, xen_virt_to_bus and range_straddles_page_boundary grant-table: call set_phys_to_machine after mapping grant refs arm,arm64: do not always merge biovec if we are running on Xen swiotlb: print a warning when the swiotlb is full swiotlb-xen: use xen_dma_map/unmap_page, xen_dma_sync_single_for_cpu/device xen: introduce xen_dma_map/unmap_page and xen_dma_sync_single_for_cpu/device swiotlb-xen: use xen_alloc/free_coherent_pages xen: introduce xen_alloc/free_coherent_pages arm64/xen: get_dma_ops: return xen_dma_ops if we are running as xen_initial_domain arm/xen: get_dma_ops: return xen_dma_ops if we are running as xen_initial_domain swiotlb-xen: introduce xen_swiotlb_set_dma_mask xen/arm,arm64: enable SWIOTLB_XEN xen: make xen_create_contiguous_region return the dma address xen/x86: allow __set_phys_to_machine for autotranslate guests arm/xen,arm64/xen: introduce p2m arm64: define DMA_ERROR_CODE arm: make SWIOTLB available Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> Conflicts: arch/arm/include/asm/dma-mapping.h drivers/xen/swiotlb-xen.c [Conflicts arose b/c "arm: make SWIOTLB available" v8 was in Stefano's branch, while I had v9 + Ack from Russel. I also fixed up white-space issues]
2013-11-08Merge tag 'v3.12-rc5' into stable/for-linus-3.13Konrad Rzeszutek Wilk
Linux 3.12-rc5 Because the Stefano branch (for SWIOTLB ARM changes) is based on that. Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> * tag 'v3.12-rc5': (550 commits) Linux 3.12-rc5 watchdog: sunxi: Fix section mismatch watchdog: kempld_wdt: Fix bit mask definition watchdog: ts72xx_wdt: locking bug in ioctl ARM: exynos: dts: Update 5250 arch timer node with clock frequency parisc: let probe_kernel_read() capture access to page zero parisc: optimize variable initialization in do_page_fault parisc: fix interruption handler to respect pagefault_disable() parisc: mark parisc_terminate() noreturn and cold. parisc: remove unused syscall_ipi() function. parisc: kill SMP single function call interrupt parisc: Export flush_cache_page() (needed by lustre) vfs: allow O_PATH file descriptors for fstatfs() ext4: fix memory leak in xattr ARC: Ignore ptrace SETREGSET request for synthetic register "stop_pc" ALSA: hda - Sony VAIO Pro 13 (haswell) now has a working headset jack ALSA: hda - Add a headset mic model for ALC269 and friends ALSA: hda - Fix microphone for Sony VAIO Pro 13 (Haswell model) compiler/gcc4: Add quirk for 'asm goto' miscompilation bug Revert "i915: Update VGA arbiter support for newer devices" ...
2013-11-08swiotlb-xen: missing include dma-direction.hStefano Stabellini
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-11-08pci-swiotlb-xen: call pci_request_acs only ifdef CONFIG_PCIStefano Stabellini
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
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.
2013-11-08xen: delete new instances of added __cpuinitPaul Gortmaker
commit 6efa20e49b9cb1db1ab66870cc37323474a75a13 ("xen: Support 64-bit PV guest receiving NMIs") and commit cd9151e26d31048b2b5e00fd02e110e07d2200c9 ( "xen/balloon: set a mapping for ballooned out pages") added new instances of __cpuinit usage. We removed this a couple versions ago; we now want to remove the compat no-op stubs. Introducing new users is not what we want to see at this point in time, as it will break once the stubs are gone. Cc: Konrad Rzeszutek Wilk <konrad@kernel.org> Cc: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-11-08xen/balloon: Set balloon's initial state to number of existing RAM pagesBoris Ostrovsky
Currently balloon's initial value is set to max_pfn which includes non-RAM ranges such as MMIO hole. As result, initial memory target (specified by guest's configuration file) will appear smaller than what balloon driver perceives to be the current number of available pages. Thus it will balloon down "extra" pages, decreasing amount of available memory for no good reason. Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-11-08xen/mcfg: Call PHYSDEVOP_pci_mmcfg_reserved for MCFG areas.Konrad Rzeszutek Wilk
The PCI MMCONFIG area is usually reserved via the E820 so the Xen hypervisor is aware of these regions. But they can also be enumerated in the ACPI DSDT which means the hypervisor won't know of them until the initial domain informs it of via PHYSDEVOP_pci_mmcfg_reserved. This is what this patch does for all of the MCFG regions that the initial domain is aware of (E820 enumerated and ACPI). Reported-by: Santosh Jodh <Santosh.Jodh@citrix.com> CC: Jan Beulich <JBeulich@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> CC: David Vrabel <david.vrabel@citrix.com> CC: Mukesh Rathor <mukesh.rathor@oracle.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> [v1: Redid it a bit] [v2: Dropped the P2M 1-1 setting] [v3: Check for Xen in-case we are running under baremetal] [v4: Wrap with CONFIG_PCI_MMCONFIG]
2013-11-06xen: remove deprecated IRQF_DISABLEDMichael Opdenacker
This patch proposes to remove the IRQF_DISABLED flag from drivers/xen code. It's a NOOP since 2.6.35 and it will be removed one day. Note that architecture dependent fixes for IRQF_DISABLED were already submitted through separate patches. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-11-06x86/xen: remove deprecated IRQF_DISABLEDMichael Opdenacker
This patch proposes to remove the IRQF_DISABLED flag from x86/xen code. It's a NOOP since 2.6.35 and it will be removed one day. Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-10-29swiotlb-xen: fix error code returned by xen_swiotlb_map_sg_attrsStefano Stabellini
map_sg returns the number of elements mapped, not a dma_addr_t. In case of error return 0, not DMA_ERROR_CODE. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2013-10-25swiotlb-xen: static inline xen_phys_to_bus, xen_bus_to_phys, xen_virt_to_bus ↵Stefano Stabellini
and range_straddles_page_boundary This functions are small and called frequently. Static inline them. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
2013-10-25grant-table: call set_phys_to_machine after mapping grant refsStefano Stabellini
When mapping/unmapping grant refs, call set_phys_to_machine to update the P2M with the new mappings for autotranslate guests. This is (almost) a nop on x86. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Changes in v9: - add in-code comments.
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.
2013-10-25swiotlb: print a warning when the swiotlb is fullStefano Stabellini
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com> Changes in v7: - use dev_warn instead of pr_warn.
2013-10-25swiotlb-xen: use xen_dma_map/unmap_page, xen_dma_sync_single_for_cpu/deviceStefano Stabellini
Call xen_dma_map_page, xen_dma_unmap_page, xen_dma_sync_single_for_cpu, xen_dma_sync_single_for_device from swiotlb-xen to ensure cpu/device coherency of the pages used for DMA, including the ones belonging to the swiotlb buffer. Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
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.
2013-10-24tracing/events: Fix swiotlb tracepoint creationThierry Reding
Tracepoints are only created when Xen support is enabled, but they are also referenced within lib/swiotlb.c. So unless Xen support is enabled the tracepoints will be missing, therefore causing builds to fail. Fix this by moving the tracepoint creation to lib/swiotlb.c, which works nicely because the Xen swiotlb support selects the generic swiotlb support. Signed-off-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
2013-10-13Linux 3.12-rc5Linus Torvalds
2013-10-13Merge git://www.linux-watchdog.org/linux-watchdogLinus Torvalds
Pull watchdog fixes from Wim Van Sebroeck: "This will fix a deadlock on the ts72xx_wdt driver, fix bitmasks in the kempld_wdt driver and fix a section mismatch in the sunxi_wdt driver" * git://www.linux-watchdog.org/linux-watchdog: watchdog: sunxi: Fix section mismatch watchdog: kempld_wdt: Fix bit mask definition watchdog: ts72xx_wdt: locking bug in ioctl
2013-10-13watchdog: sunxi: Fix section mismatchMaxime Ripard
This driver has a section mismatch, for probe and remove functions, leading to the following warning during the compilation. WARNING: drivers/watchdog/built-in.o(.data+0x24): Section mismatch in reference from the variable sunxi_wdt_driver to the function .init.text:sunxi_wdt_probe() The variable sunxi_wdt_driver references the function __init sunxi_wdt_probe() Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2013-10-13watchdog: kempld_wdt: Fix bit mask definitionJingoo Han
STAGE_CFG bits are defined as [5:4] bits. However, '(((x) & 0x30) << 4)' handles [9:8] bits. Thus, it should be fixed in order to handle [5:4] bits. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2013-10-13watchdog: ts72xx_wdt: locking bug in ioctlDan Carpenter
Calling the WDIOC_GETSTATUS & WDIOC_GETBOOTSTATUS and twice will cause a interruptible deadlock. Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Wim Van Sebroeck <wim@iguana.be>
2013-10-13Merge tag 'fixes-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc Pull ARM SoC fixes from Olof Johansson: "A small batch of fixes this week, mostly OMAP related. Nothing stands out as particularly controversial. Also a fix for a 3.12-rc1 timer regression for Exynos platforms, including the Chromebooks" * tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: ARM: exynos: dts: Update 5250 arch timer node with clock frequency ARM: OMAP2: RX-51: Add missing max_current to rx51_lp5523_led_config ARM: mach-omap2: board-generic: fix undefined symbol ARM: dts: Fix pinctrl mask for omap3 ARM: OMAP3: Fix hardware detection for omap3630 when booted with device tree ARM: OMAP2: gpmc-onenand: fix sync mode setup with DT
2013-10-13ARM: exynos: dts: Update 5250 arch timer node with clock frequencyYuvaraj Kumar C D
Without the "clock-frequency" property in arch timer node, could able to see the below crash dump. [<c0014e28>] (unwind_backtrace+0x0/0xf4) from [<c0011808>] (show_stack+0x10/0x14) [<c0011808>] (show_stack+0x10/0x14) from [<c036ac1c>] (dump_stack+0x7c/0xb0) [<c036ac1c>] (dump_stack+0x7c/0xb0) from [<c01ab760>] (Ldiv0_64+0x8/0x18) [<c01ab760>] (Ldiv0_64+0x8/0x18) from [<c0062f60>] (clockevents_config.part.2+0x1c/0x74) [<c0062f60>] (clockevents_config.part.2+0x1c/0x74) from [<c0062fd8>] (clockevents_config_and_register+0x20/0x2c) [<c0062fd8>] (clockevents_config_and_register+0x20/0x2c) from [<c02b8e8c>] (arch_timer_setup+0xa8/0x134) [<c02b8e8c>] (arch_timer_setup+0xa8/0x134) from [<c04b47b4>] (arch_timer_init+0x1f4/0x24c) [<c04b47b4>] (arch_timer_init+0x1f4/0x24c) from [<c04b40d8>] (clocksource_of_init+0x34/0x58) [<c04b40d8>] (clocksource_of_init+0x34/0x58) from [<c049ed8c>] (time_init+0x20/0x2c) [<c049ed8c>] (time_init+0x20/0x2c) from [<c049b95c>] (start_kernel+0x1e0/0x39c) THis is because the Exynos u-boot, for example on the Chromebooks, doesn't set up the CNTFRQ register as expected by arch_timer. Instead, we have to specify the frequency in the device tree like this. Signed-off-by: Yuvaraj Kumar C D <yuvaraj.cd@samsung.com> [olof: Changed subject, added comment, elaborated on commit message] Signed-off-by: Olof Johansson <olof@lixom.net>
2013-10-13Merge tag 'fixes-against-v3.12-rc3-take2' of ↵Olof Johansson
git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap into fixes From Tony Lindgren: Few fixes for omap3 related hangs and errors that people have noticed now that people are actually using the device tree based booting for omap3. Also one regression fix for timer compile for dra7xx when omap5 is not selected, and a LED regression fix for n900. * tag 'fixes-against-v3.12-rc3-take2' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap: ARM: OMAP2: RX-51: Add missing max_current to rx51_lp5523_led_config ARM: mach-omap2: board-generic: fix undefined symbol ARM: dts: Fix pinctrl mask for omap3 ARM: OMAP3: Fix hardware detection for omap3630 when booted with device tree ARM: OMAP2: gpmc-onenand: fix sync mode setup with DT Signed-off-by: Olof Johansson <olof@lixom.net>
2013-10-13Merge branch 'parisc-3.12' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux Pull parisc fixes from Helge Deller: "This patchset includes a bugfix to prevent a kernel crash when memory in page zero is accessed by the kernel itself, e.g. via probe_kernel_read(). Furthermore we now export flush_cache_page() which is needed (indirectly) by the lustre filesystem. The other patches remove unused functions and optimizes the page fault handler to only evaluate variables if needed, which again protects against possible kernel crashes" * 'parisc-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: let probe_kernel_read() capture access to page zero parisc: optimize variable initialization in do_page_fault parisc: fix interruption handler to respect pagefault_disable() parisc: mark parisc_terminate() noreturn and cold. parisc: remove unused syscall_ipi() function. parisc: kill SMP single function call interrupt parisc: Export flush_cache_page() (needed by lustre)
2013-10-13Merge branch 'fixes' of git://git.infradead.org/users/vkoul/slave-dmaLinus Torvalds
Pull slave-dmaengine fixes from Vinod Koul: "Another week, time to send another fixes request taking time out of extended weekend for the festivities in this part of the world. We have two fixes from Sergei for rcar driver and one fixing memory leak of edma driver by Geyslan" * 'fixes' of git://git.infradead.org/users/vkoul/slave-dma: dma: edma.c: remove edma_desc leakage rcar-hpbdma: add parameter to set_slave() method rcar-hpbdma: remove shdma_free_irq() calls
2013-10-13parisc: let probe_kernel_read() capture access to page zeroHelge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2013-10-13parisc: optimize variable initialization in do_page_faultJohn David Anglin
The attached change defers the initialization of the variables tsk, mm and flags until they are needed. As a result, the code won't crash if a kernel probe is done with a corrupt context and the code will be better optimized. Signed-off-by: John David Anglin <dave.anglin@bell.net> Signed-off-by: Helge Deller <deller@gmx.de>
2013-10-13parisc: fix interruption handler to respect pagefault_disable()Helge Deller
Running an "echo t > /proc/sysrq-trigger" crashes the parisc kernel. The problem is, that in print_worker_info() we try to read the workqueue info via the probe_kernel_read() functions which use pagefault_disable() to avoid crashes like this: probe_kernel_read(&pwq, &worker->current_pwq, sizeof(pwq)); probe_kernel_read(&wq, &pwq->wq, sizeof(wq)); probe_kernel_read(name, wq->name, sizeof(name) - 1); The problem here is, that the first probe_kernel_read(&pwq) might return zero in pwq and as such the following probe_kernel_reads() try to access contents of the page zero which is read protected and generate a kernel segfault. With this patch we fix the interruption handler to call parisc_terminate() directly only if pagefault_disable() was not called (in which case preempt_count()==0). Otherwise we hand over to the pagefault handler which will try to look up the faulting address in the fixup tables. Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org> # v3.0+ Signed-off-by: John David Anglin <dave.anglin@bell.net> Signed-off-by: Helge Deller <deller@gmx.de>
2013-10-13parisc: mark parisc_terminate() noreturn and cold.Helge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2013-10-13parisc: remove unused syscall_ipi() function.Helge Deller
Signed-off-by: Helge Deller <deller@gmx.de>
2013-10-13parisc: kill SMP single function call interruptJiang Liu
Commit 9a46ad6d6df3b54 "smp: make smp_call_function_many() use logic similar to smp_call_function_single()" has unified the way to handle single and multiple cross-CPU function calls. Now only one interrupt is needed for architecture specific code to support generic SMP function call interfaces, so kill the redundant single function call interrupt. Signed-off-by: Jiang Liu <jiang.liu@huawei.com> Cc: Jiang Liu <liuj97@gmail.com> Signed-off-by: Helge Deller <deller@gmx.de>
2013-10-13parisc: Export flush_cache_page() (needed by lustre)Geert Uytterhoeven
ERROR: "flush_cache_page" [drivers/staging/lustre/lustre/libcfs/libcfs.ko] undefined! Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Helge Deller <deller@gmx.de>
2013-10-12vfs: allow O_PATH file descriptors for fstatfs()Linus Torvalds
Olga reported that file descriptors opened with O_PATH do not work with fstatfs(), found during further development of ksh93's thread support. There is no reason to not allow O_PATH file descriptors here (fstatfs is very much a path operation), so use "fdget_raw()". See commit 55815f70147d ("vfs: make O_PATH file descriptors usable for 'fstat()'") for a very similar issue reported for fstat() by the same team. Reported-and-tested-by: ольга крыжановская <olga.kryzhanovska@gmail.com> Acked-by: Al Viro <viro@zeniv.linux.org.uk> Cc: stable@kernel.org # O_PATH introduced in 3.0+ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2013-10-12Merge tag 'ext4_for_linus_stable' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 Pull ext4 bugfixes from Ted Ts'o: "A bug fix and performance regression fix for ext4" * tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: fix memory leak in xattr ext4: fix performance regression in writeback of random writes
2013-10-12Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs Pull btrfs fixes from Chris Mason: "We've got more bug fixes in my for-linus branch: One of these fixes another corner of the compression oops from last time. Miao nailed down some problems with concurrent snapshot deletion and drive balancing. I kept out one of his patches for more testing, but these are all stable" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs: Btrfs: fix oops caused by the space balance and dead roots Btrfs: insert orphan roots into fs radix tree Btrfs: limit delalloc pages outside of find_delalloc_range Btrfs: use right root when checking for hash collision
2013-10-12Merge tag 'sound-3.12' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound Pull sound fixes from Takashi Iwai: "All stable fixes except for a trivial headset mic fixup: the removal of bogus frame checks in snd-usb-usx2y driver that have regressed in the recent kernel versions, the HD-audio HDMI channel map fix, and a few HD-audio device-specific fixes" * tag 'sound-3.12' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: ALSA: hda - Sony VAIO Pro 13 (haswell) now has a working headset jack ALSA: hda - Add a headset mic model for ALC269 and friends ALSA: hda - Fix microphone for Sony VAIO Pro 13 (Haswell model) ALSA: hda - Add fixup for ASUS N56VZ ALSA: hda - hdmi: Fix channel map switch not taking effect ALSA: hda - Fix mono speakers and headset mic on Dell Vostro 5470 ALSA: snd-usb-usx2y: remove bogus frame checks
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