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2015-03-05x86/fpu/xsaves: Fix improper uses of __ex_tableQuentin Casasnovas1-17/+11
Commit: f31a9f7c7169 ("x86/xsaves: Use xsaves/xrstors to save and restore xsave area") introduced alternative instructions for XSAVES/XRSTORS and commit: adb9d526e982 ("x86/xsaves: Add xsaves and xrstors support for booting time") added support for the XSAVES/XRSTORS instructions at boot time. Unfortunately both failed to properly protect them against faulting: The 'xstate_fault' macro will use the closest label named '1' backward and that ends up in the .altinstr_replacement section rather than in .text. This means that the kernel will never find in the __ex_table the .text address where this instruction might fault, leading to serious problems if userspace manages to trigger the fault. Signed-off-by: Quentin Casasnovas <quentin.casasnovas@oracle.com> Signed-off-by: Jamie Iles <jamie.iles@oracle.com> [ Improved the changelog, fixed some whitespace noise. ] Acked-by: Borislav Petkov <bp@alien8.de> Acked-by: Linus Torvalds <torvalds@linux-foundation.org> Cc: <stable@vger.kernel.org> Cc: Allan Xavier <mr.a.xavier@gmail.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Fixes: adb9d526e982 ("x86/xsaves: Add xsaves and xrstors support for booting time") Fixes: f31a9f7c7169 ("x86/xsaves: Use xsaves/xrstors to save and restore xsave area") Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-05x86/intel/quark: Select COMMON_CLKAndy Shevchenko1-0/+1
The commit 8bbc2a135b63 ("x86/intel/quark: Add Intel Quark platform support") introduced a minimal support of Intel Quark SoC. That allows to use core parts of the SoC. However, the SPI, I2C, and GPIO drivers can't be selected by kernel configuration because they depend on COMMON_CLK. The patch adds a COMMON_CLK selection to the platfrom definition to allow user choose the drivers. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Ong, Boon Leong <boon.leong.ong@intel.com> Cc: Bryan O'Donoghue <pure.logic@nexus-software.ie> Cc: Darren Hart <dvhart@linux.intel.com> Fixes: 8bbc2a135b63 ("x86/intel/quark: Add Intel Quark platform support") Link: http://lkml.kernel.org/r/1425569044-2867-1-git-send-email-andriy.shevchenko@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-05ARM: at91/pm: MOR register KEY was missingPatrice Vilchez1-0/+2
Because writing the MOR register requires the PASSWD(0x37), if missed, the write operation will be aborted. Signed-off-by: Patrice Vilchez <patrice.vilchez@atmel.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-05ARM: at91/dt: sama5d4: fix lcdck clock definitionBoris BREZILLON1-2/+2
lcdck takes mck (not smd) as its parent. It is also assigned id 3 and not 4. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> [nicolas.ferre@atmel.com: squashed 2 related patches] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-05ARM: at91/dt: sama5d4: rename lcd_clk into lcdc_clkBoris BREZILLON1-1/+1
Rename lcd_clk into lcdc_clk to be consistent with sama5d3 clock definitions. Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-05ARM: at91: debug: fix non MMU debugAlexandre Belloni1-1/+4
Linux may be used without MMU on atmel SoCs, fix debug in this configuration. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-04ARM: fix typos in smc91x platform dataArnd Bergmann4-4/+5
I recently did a rework of the smc91x driver and did some build-testing by compiling hundreds of randconfig kernels. Unfortunately, my script was wrong and did not actually test the configurations that mattered, so I introduced stupid typos in almost every file I touched. I fixed my script now, built all configurations that actually matter and fixed all the typos, this is the result. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Fixes: b70661c70830d ("net: smc91x: use run-time configuration on all ARM machines") Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-05x86/asm/entry/64: Remove a bogus 'ret_from_fork' optimizationAndy Lutomirski1-5/+8
'ret_from_fork' checks TIF_IA32 to determine whether 'pt_regs' and the related state make sense for 'ret_from_sys_call'. This is entirely the wrong check. TS_COMPAT would make a little more sense, but there's really no point in keeping this optimization at all. This fixes a return to the wrong user CS if we came from int 0x80 in a 64-bit task. Signed-off-by: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: <stable@vger.kernel.org> Link: http://lkml.kernel.org/r/4710be56d76ef994ddf59087aad98c000fbab9a4.1424989793.git.luto@amacapital.net [ Backported from tip:x86/asm. ] Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-03-04ARM: multi_v7_defconfig: increase the number of maximum number of CPUs to 16Tyler Baker1-1/+1
The HiSilicon HiP04 has 16 CPUs. I propose we increase the maximum number of CPUs to 16 to avoid the following warning identified during automated boot testing [1]. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at ../arch/arm/kernel/devtree.c:144 arm_dt_init_cpu_maps+0x118/0x1e8() DT /cpu 9 nodes greater than max cores 8, capping them Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 3.19.0-00528-gbdccc4edeb03 #1 Hardware name: Hisilicon HiP04 (Flattened Device Tree) [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [] (show_stack) from [] (dump_stack+0x78/0x94) [] (dump_stack) from [] (warn_slowpath_common+0x74/0xb0) [] (warn_slowpath_common) from [] (warn_slowpath_fmt+0x30/0x40) [] (warn_slowpath_fmt) from [] (arm_dt_init_cpu_maps+0x118/0x1e8) [] (arm_dt_init_cpu_maps) from [] (setup_arch+0x638/0x9a0) [] (setup_arch) from [] (start_kernel+0x8c/0x3b4) [] (start_kernel) from [<10208074>] (0x10208074) ---[ end trace cb88537fdc8fa200 ]--- [1] http://storage.kernelci.org/mainline/v3.19-528-gbdccc4edeb03/arm-multi_v7_defconfig/lab-tbaker/boot-hip04-d01.html Cc: Olof Johansson <olof@lixom.net> Cc: Kevin Hilman <khilman@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Tyler Baker <tyler.baker@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-03-04ARM: sunxi_defconfig: increase the number of maximum number of CPUs to 8Tyler Baker1-0/+1
The a80 optimus has 8 CPUs. I propose we increase the maximum number of CPUs to 8 to avoid the following warning identified during automated boot testing [1]. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 0 at ../arch/arm/kernel/devtree.c:144 arm_dt_init_cpu_maps+0x110/0x1e0() DT /cpu 5 nodes greater than max cores 4, capping them CPU: 0 PID: 0 Comm: swapper Not tainted 3.19.0-00528-gbdccc4edeb03 #1 Hardware name: Allwinner sun9i Family [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [] (show_stack) from [] (dump_stack+0x74/0x90) [] (dump_stack) from [] (warn_slowpath_common+0x70/0xac) [] (warn_slowpath_common) from [] (warn_slowpath_fmt+0x30/0x40) [] (warn_slowpath_fmt) from [] (arm_dt_init_cpu_maps+0x110/0x1e0) [] (arm_dt_init_cpu_maps) from [] (setup_arch+0x634/0x8d4) [] (setup_arch) from [] (start_kernel+0x88/0x3ac) [] (start_kernel) from [<20008074>] (0x20008074) ---[ end trace cb88537fdc8fa200 ]--- [1] http://storage.kernelci.org/mainline/v3.19-528-gbdccc4edeb03/arm-sunxi_defconfig/lab-tbaker/boot-sun9i-a80-optimus.html Cc: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Olof Johansson <olof@lixom.net> Cc: Kevin Hilman <khilman@kernel.org> Cc: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Tyler Baker <tyler.baker@linaro.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2015-03-04dtb: change binding name to match with newer firmware DTIyappan Subramanian1-2/+2
This patch fixes the backward compatibility of the older driver with the newer firmware by making the binding unique so that the older driver won't recognize the non-supported interfaces. The new bindings are in sync with the newer firmware. Signed-off-by: Iyappan Subramanian <isubramanian@apm.com> Signed-off-by: Keyur Chudgar <kchudgar@apm.com> Tested-by: Mark Langsdorf <mlangsdo@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2015-03-04Merge tag 'at91-fixes' of ↵Arnd Bergmann12-58/+58
git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91 into fixes Merge "First fixes batch for AT91 on 4.0" from Nicolas Ferre: - PM slowclock fixes for DDR and timeouts - fix some DT entries - little defconfig updates - the removal of a harmful watchdog option + its detailed documentation * tag 'at91-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/nferre/linux-at91: ARM: at91/dt: keep watchdog running in idle mode dts: Documentation: AT91 Watchdog, explain what atmel,idle-halt property really do ARM: at91/defconfig: add at91rm9200 ethernet support ARM: at91/defconfig: remove CONFIG_SYSFS_DEPRECATED ARM: at91/dt: at91sam9260: fix usart pinctrl ARM: at91/dt: sama5d4: add missing alias for i2c0 ARM: at91/dt: at91sam9263: Fixup sram1 device tree node ARM: at91: pm: fix SRAM allocation ARM: at91: pm: fix at91rm9200 standby pm: at91: Workaround DDRSDRC self-refresh bug with LPDDR1 memories. pm: at91: pm_slowclock: fix suspend/resume hang up in timeouts
2015-03-04Merge tag 'samsung-fixes-1' of ↵Arnd Bergmann2-4/+3
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes Merge "Samsung fixes for v4.0" from Kukjin Kim: * tag samsung-fixes-1: ARM: EXYNOS: Fix wrong hwirq of RTC interrupt for Exynos3250 SoC ARM: EXYNOS: Don't use LDREX and STREX after disabling cache coherency
2015-03-04Merge tag 'samsung-fixes-dt' of ↵Arnd Bergmann19-11/+534
git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung into fixes Merge "Samsung tmu and hdmi regression fixes for v4.0" from Kukjin Kim: - The thermal management unit and HDMI (drm mixer driver) related reworks have been merged in v4.0 merge window. So if this DT changes are missed for v4.0, we regressions in v4.0 release for exynos platforms such as exynos5250, exynos5420, exynos4 SoCs. - Note since there was a dependency with driver side, this cannot be sent to upstream during preivous merge window and now it has been resolved. * tag 'samsung-fixes-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/kgene/linux-samsung: ARM: dts: add display power domain for exynos5250 ARM: dts: add 'hdmi' clock to mixer nodes for exynos5250 and exynos5420 ARM: dts: enable hdmi support for exynos4210-universal_c210 ARM: dts: enable hdmi support for exynos4412-odroid-common ARM: dts: add dependency between TV and LCD0 power domains for exynos4 ARM: dts: add hdmi related nodes for exynos4 SoCs ARM: EXYNOS: add support for sub-power domains dt-bindings: document a note about power domain subdomains ARM: dts: Provide dt bindings identical for Exynos TMU ARM: dts: Trip points and sensor configuration data for exynos5440 ARM: dts: define default thermal-zones for exynos4 ARM: dts: default trip points definition for exynos5420 ARM: dts: add TMU default definitions for exynos4412 ARM: dts: Adding CPU cooling binding for Exynos SoCs ARM: dts: Enable TMU for exynos4412-odriod-common ARM: dts: Add LDO10 for TMU for exynos4412-odroid-common ARM: dts: Enable TMU for exynos4210-trats
2015-03-04ARM: socfpga: make sure socfpga_cpu1start_addr is properly flushedRussell King1-0/+5
Make sure socfpga_cpu1start_addr is properly flushed from it's cache line so that secondary cpu's can see it. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Tested-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
2015-03-04ARM: socfpga: fix uart DMA binding errorSteffen Trumtrar1-0/+6
socfpga.dtsi is missing the DMA channels for the uart nodes. This will produce the following errors: of_dma_request_slave_channel: dma-names property of node '/soc/serial0@ffc02000' missing or empty ttyS0 - failed to request DMA Provide the correct DMA channels to fix this. Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
2015-03-04ARM: socfpga: Correct SCU virtual mapping in socfpgaVince Bridgers1-1/+1
Correct SCU virtual mapping that was causing this BUG message: "BUG: mapping for 0xfffec000 at 0xfffec000 out of vmalloc space" Signed-off-by: Vince Bridgers <vbridger@opensource.altera.com> Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
2015-03-04Merge git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds9-26/+31
Pull KVM fixes from Marcelo Tosatti: "KVM bug fixes, including a SVM interrupt injection regression fix, MIPS and ARM bug fixes" * git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: MIPS: Enable after disabling interrupt KVM: MIPS: Fix trace event to save PC directly KVM: SVM: fix interrupt injection (apic->isr_count always 0) KVM: emulate: fix CMPXCHG8B on 32-bit hosts KVM: VMX: fix build without CONFIG_SMP arm/arm64: KVM: Add exit reaons to kvm_exit event tracing ARM: KVM: Fix size check in __coherent_cache_guest_page
2015-03-04Merge tag 'arc-4.0-fixes-1' of ↵Linus Torvalds6-36/+73
git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc Pull ARC fixes from Vineet Gupta: - Fix for /proc/<pid>/maps "stack" vma annotation - sched stats not printing correct sleeping task PC - perf not reporting page faults * tag 'arc-4.0-fixes-1' of git://git.kernel.org/pub/scm/linux/kernel/git/vgupta/arc: ARC: Fix thread_saved_pc() ARC: Fix KSTK_ESP() ARC: perf: Enable generic software events ARC: Make arc_unwind_core accessible externally
2015-03-04Merge tag 'powerpc-4.0-2' of ↵Linus Torvalds6-28/+45
git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux Pull powerpc fixes from Michael Ellerman: - Fix for dynticks. - Fix for smpboot bug. - Fix for IOMMU group refcounting. * tag 'powerpc-4.0-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mpe/linux: powerpc/iommu: Remove IOMMU device references via bus notifier powerpc/smp: Wait until secondaries are active & online powerpc: Re-enable dynticks
2015-03-04microblaze: Fix syscall error recovery for invalid syscall IDsJamie Garside1-1/+2
This patch fixes two bugs in the Microblaze syscall trap handler when an invalid syscall ID is used. First, the range check on line 351 only checks for syscall IDs greater than __NR_syscalls. A negative syscall ID (either passed to `syscall()` or as returned by `do_syscall_trace_enter()` on error) will still satisfy this test and cause the Linux kernel to access an invalid memory location and cause a kernel oops. This has been fixed by also checking for r12 < 0. Secondly, the current error recovery at line 378 returns using the wrong register (r15 instead of r14) and does not restore the previous stack state. This has been fixed by invoking `ret_from_trap` on error, setting r3 to `-ENOSYS`, similar to what would happen when calling a valid syscall. Signed-off-by: Jamie Garside <jamie.garside@york.ac.uk> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2015-03-04microblaze: Coding style cleanupMichal Simek1-2/+2
No function change. Signed-off-by: Michal Simek <michal.simek@xilinx.com>
2015-03-04x86/PCI/ACPI: Ignore resources consumed by host bridge itselfJiang Liu1-3/+8
When parsing resources for PCI host bridge, we should ignore resources consumed by host bridge itself and only report window resources available to child PCI busses. Fixes: 593669c2ac0f (x86/PCI/ACPI: Use common ACPI resource interfaces ...) Signed-off-by: Jiang Liu <jiang.liu@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-03-04ARM: at91/dt: keep watchdog running in idle modeMichel Marti6-6/+0
Since turning on idle-halt in commit fe46aa679f12 (ARM: at91/dt: add sam9 watchdog default options to SoCs), SoCs compatible with at91sam9260-wdt no longer reboot if the watchdog times out while the CPU is in idle state. Removing the 'idle-halt' flag that was set by default fixes this. Signed-off-by: Michel Marti <mma@objectxp.com> Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com> Acked-by: Sylvain Rochet <sylvain.rochet@finsecur.com> [nicolas.ferre@atmel.com: rework the commit message] Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-04KVM: s390: non-LPAR case obsolete during facilities mask initMichael Mueller1-16/+1
With patch "include guest facilities in kvm facility test" it is no longer necessary to have special handling for the non-LPAR case. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-03-04KVM: s390: include guest facilities in kvm facility testMichael Mueller4-22/+25
Most facility related decisions in KVM have to take into account: - the facilities offered by the underlying run container (LPAR/VM) - the facilities supported by the KVM code itself - the facilities requested by a guest VM This patch adds the KVM driver requested facilities to the test routine. It additionally renames struct s390_model_fac to kvm_s390_fac and its field names to be more meaningful. The semantics of the facilities stored in the KVM architecture structure is changed. The address arch.model.fac->list now points to the guest facility list and arch.model.fac->mask points to the KVM facility mask. This patch fixes the behaviour of KVM for some facilities for guests that ignore the guest visible facility bits, e.g. guests could use transactional memory intructions on hosts supporting them even if the chosen cpu model would not offer them. The userspace interface is not affected by this change. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-03-04KVM: s390: fix in memory copy of facility listsMichael Mueller1-2/+2
The facility lists were not fully copied. Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-03-04ARM: at91/defconfig: add at91rm9200 ethernet supportAlexandre Belloni1-0/+1
There is now only one defconfig for the at91rm9200 and at91sam9. Add ethernet support for the at91rm9200. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-04ARM: at91/defconfig: remove CONFIG_SYSFS_DEPRECATEDAnthony Harivel1-2/+0
Recent distributions and userspace tools after 2009/2010 depend on the existence of /sys/class/block/, and will not work with this option enabled. Signed-off-by: Anthony Harivel <anthony.harivel@emtrion.de> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-04ARM: at91/dt: at91sam9260: fix usart pinctrlJonas Andersson1-2/+2
Corrected pins used by usart3. Signed-off-by: Jonas Andersson <jonas@microbit.se> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-04KVM: s390/cpacf: Fix kernel bug under z/VMChristian Borntraeger1-3/+6
Under z/VM PQAP might trigger an operation exception if no crypto cards are defined via APVIRTUAL or APDEDICATED. [ 386.098666] Kernel BUG at 0000000000135c56 [verbose debug info unavailable] [ 386.098693] illegal operation: 0001 ilc:2 [#1] SMP [...] [ 386.098751] Krnl PSW : 0704c00180000000 0000000000135c56 (kvm_s390_apxa_installed+0x46/0x98) [...] [ 386.098804] [<000000000013627c>] kvm_arch_init_vm+0x29c/0x358 [ 386.098806] [<000000000012d008>] kvm_dev_ioctl+0xc0/0x460 [ 386.098809] [<00000000002c639a>] do_vfs_ioctl+0x332/0x508 [ 386.098811] [<00000000002c660e>] SyS_ioctl+0x9e/0xb0 [ 386.098814] [<000000000070476a>] system_call+0xd6/0x258 [ 386.098815] [<000003fffc7400a2>] 0x3fffc7400a2 Lets add an extable entry and provide a zeroed config in that case. Reported-by: Stefan Zimmermann <stzi@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Reviewed-by: Thomas Huth <thuth@linux.vnet.ibm.com> Tested-by: Stefan Zimmermann <stzi@linux.vnet.ibm.com>
2015-03-04powerpc/iommu: Remove IOMMU device references via bus notifierNishanth Aravamudan4-26/+34
After d905c5df9aef ("PPC: POWERNV: move iommu_add_device earlier"), the refcnt on the kobject backing the IOMMU group for a PCI device is elevated by each call to pci_dma_dev_setup_pSeriesLP() (via set_iommu_table_base_and_group). When we go to dlpar a multi-function PCI device out: iommu_reconfig_notifier -> iommu_free_table -> iommu_group_put BUG_ON(tbl->it_group) We trip this BUG_ON, because there are still references on the table, so it is not freed. Fix this by moving the powernv bus notifier to common code and calling it for both powernv and pseries. Fixes: d905c5df9aef ("PPC: POWERNV: move iommu_add_device earlier") Signed-off-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Tested-by: Nishanth Aravamudan <nacc@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-03-04powerpc/smp: Wait until secondaries are active & onlineMichael Ellerman1-2/+2
Anton has a busy ppc64le KVM box where guests sometimes hit the infamous "kernel BUG at kernel/smpboot.c:134!" issue during boot: BUG_ON(td->cpu != smp_processor_id()); Basically a per CPU hotplug thread scheduled on the wrong CPU. The oops output confirms it: CPU: 0 Comm: watchdog/130 The problem is that we aren't ensuring the CPU active bit is set for the secondary before allowing the master to continue on. The master unparks the secondary CPU's kthreads and the scheduler looks for a CPU to run on. It calls select_task_rq() and realises the suggested CPU is not in the cpus_allowed mask. It then ends up in select_fallback_rq(), and since the active bit isnt't set we choose some other CPU to run on. This seems to have been introduced by 6acbfb96976f "sched: Fix hotplug vs. set_cpus_allowed_ptr()", which changed from setting active before online to setting active after online. However that was in turn fixing a bug where other code assumed an active CPU was also online, so we can't just revert that fix. The simplest fix is just to spin waiting for both active & online to be set. We already have a barrier prior to set_cpu_online() (which also sets active), to ensure all other setup is completed before online & active are set. Fixes: 6acbfb96976f ("sched: Fix hotplug vs. set_cpus_allowed_ptr()") Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2015-03-03Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds8-4/+47
Pull networking fixes from David Miller: 1) If an IPVS tunnel is created with a mixed-family destination address, it cannot be removed. Fix from Alexey Andriyanov. 2) Fix module refcount underflow in netfilter's nft_compat, from Pablo Neira Ayuso. 3) Generic statistics infrastructure can reference variables sitting on a released function stack, therefore use dynamic allocation always. Fix from Ignacy Gawędzki. 4) skb_copy_bits() return value test is inverted in ip_check_defrag(). 5) Fix network namespace exit in openvswitch, we have to release all of the per-net vports. From Pravin B Shelar. 6) Fix signedness bug in CAIF's cfpkt_iterate(), from Dan Carpenter. 7) Fix rhashtable grow/shrink behavior, only expand during inserts and shrink during deletes. From Daniel Borkmann. 8) Netdevice names with semicolons should never be allowed, because they serve as a separator. From Matthew Thode. 9) Use {,__}set_current_state() where appropriate, from Fabian Frederick. 10) Revert byte queue limits support in r8169 driver, it's causing regressions we can't figure out. 11) tcp_should_expand_sndbuf() erroneously uses tp->packets_out to measure packets in flight, properly use tcp_packets_in_flight() instead. From Neal Cardwell. 12) Fix accidental removal of support for bluetooth in CSR based Intel wireless cards. From Marcel Holtmann. 13) We accidently added a behavioral change between native and compat tasks, wrt testing the MSG_CMSG_COMPAT bit. Just ignore it if the user happened to set it in a native binary as that was always the behavior we had. From Catalin Marinas. 14) Check genlmsg_unicast() return valud in hwsim netlink tx frame handling, from Bob Copeland. 15) Fix stale ->radar_required setting in mac80211 that can prevent starting new scans, from Eliad Peller. 16) Fix memory leak in nl80211 monitor, from Johannes Berg. 17) Fix race in TX index handling in xen-netback, from David Vrabel. 18) Don't enable interrupts in amx-xgbe driver until all software et al. state is ready for the interrupt handler to run. From Thomas Lendacky. 19) Add missing netlink_ns_capable() checks to rtnl_newlink(), from Eric W Biederman. 20) The amount of header space needed in macvtap was not calculated properly, fix it otherwise we splat past the beginning of the packet. From Eric Dumazet. 21) Fix bcmgenet TCP TX perf regression, from Jaedon Shin. 22) Don't raw initialize or mod timers, use setup_timer() and mod_timer() instead. From Vaishali Thakkar. 23) Fix software maintained statistics in bcmgenet and systemport drivers, from Florian Fainelli. 24) DMA descriptor updates in sh_eth need proper memory barriers, from Ben Hutchings. 25) Don't do UDP Fragmentation Offload on RAW sockets, from Michal Kubecek. 26) Openvswitch's non-masked set actions aren't constructed properly into netlink messages, fix from Joe Stringer. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (116 commits) openvswitch: Fix serialization of non-masked set actions. gianfar: Reduce logging noise seen due to phy polling if link is down ibmveth: Add function to enable live MAC address changes net: bridge: add compile-time assert for cb struct size udp: only allow UFO for packets from SOCK_DGRAM sockets sh_eth: Really fix padding of short frames on TX Revert "sh_eth: Enable Rx descriptor word 0 shift for r8a7790" sh_eth: Fix RX recovery on R-Car in case of RX ring underrun sh_eth: Ensure proper ordering of descriptor active bit write/read net/mlx4_en: Disbale GRO for incoming loopback/selftest packets net/mlx4_core: Fix wrong mask and error flow for the update-qp command net: systemport: fix software maintained statistics net: bcmgenet: fix software maintained statistics rxrpc: don't multiply with HZ twice rxrpc: terminate retrans loop when sending of skb fails net/hsr: Fix NULL pointer dereference and refcnt bugs when deleting a HSR interface. net: pasemi: Use setup_timer and mod_timer net: stmmac: Use setup_timer and mod_timer net: 8390: axnet_cs: Use setup_timer and mod_timer net: 8390: pcnet_cs: Use setup_timer and mod_timer ...
2015-03-03ARM: at91/dt: sama5d4: add missing alias for i2c0Nicolas Ferre1-0/+1
Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-03ARM: at91/dt: at91sam9263: Fixup sram1 device tree nodeAlexander Stein1-1/+1
Commit ff04660e48b20 ("ARM: at91/dt: add SRAM nodes") used the same base address for sram0 and sram1 leading to the following warning: WARNING: CPU: 0 PID: 1 at fs/sysfs/dir.c:31 sysfs_warn_dup+0x50/0x70() sysfs: cannot create duplicate filename '/devices/platform/300000.sram' Fix the base address for sram1. Signed-off-by: Alexander Stein <alexanders83@web.de> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-03ARM: at91: pm: fix SRAM allocationAlexandre Belloni1-12/+10
On some platforms, there are multiple SRAM nodes defined in the device tree but some of them are disabled, leading to allocation failure. Try to find the first enabled SRAM node and allocate from it. Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Tested-by: Wenyou Yang <wenyou.yang@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-03ARM: at91: pm: fix at91rm9200 standbyAlexandre Belloni1-1/+1
at91rm9200 standby and suspend to ram has been broken since 00482a4078f4. It is wrongly using AT91_BASE_SYS which is a physical address and actually doesn't correspond to any register on at91rm9200. Use the correct at91_ramc_base[0] instead. Fixes: 00482a4078f4 (ARM: at91: implement the standby function for pm/cpuidle) Signed-off-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-03pm: at91: Workaround DDRSDRC self-refresh bug with LPDDR1 memories.Peter Rosin1-5/+38
The DDRSDR controller fails miserably to put LPDDR1 memories in self-refresh. Force the controller to think it has DDR2 memories during the self-refresh period, as the DDR2 self-refresh spec is equivalent to LPDDR1, and is correctly implemented in the controller. Assume that the second controller has the same fault, but that is untested. Signed-off-by: Peter Rosin <peda@axentia.se> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-03pm: at91: pm_slowclock: fix suspend/resume hang up in timeoutsSylvain Rochet1-29/+4
Removed timeout on XTAL, PLL lock and Master Clock Ready, hang if something went wrong instead of continuing in unknown condition. There is not much we can do if a PLL lock never ends, we are running in SRAM and we will not be able to connect back the sdram or ddram in order to be able to fire up a message or just panic. As a bonus, not decounting the timeout register in slow clock mode reduce cumulated suspend time and resume time from ~17ms to ~15ms. Signed-off-by: Sylvain Rochet <sylvain.rochet@finsecur.com> Acked-by: Wenyou.Yang <wenyou.yang@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com>
2015-03-03KVM: s390/cpacf: Enable key wrapping by defaultTony Krowiak1-3/+7
z/VM and LPAR enable key wrapping by default, lets do the same on KVM. Signed-off-by: Tony Krowiak <akrowiak@linux.vnet.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2015-03-02KVM: MIPS: Enable after disabling interruptTapasweni Pathak1-0/+1
Enable disabled interrupt, on unsuccessful operation. Found by Coccinelle. Signed-off-by: Tapasweni Pathak <tapaswenipathak@gmail.com> Acked-by: Julia Lawall <julia.lawall@lip6.fr> Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2015-03-02KVM: MIPS: Fix trace event to save PC directlyJames Hogan1-3/+3
Currently the guest exit trace event saves the VCPU pointer to the structure, and the guest PC is retrieved by dereferencing it when the event is printed rather than directly from the trace record. This isn't safe as the printing may occur long afterwards, after the PC has changed and potentially after the VCPU has been freed. Usually this results in the same (wrong) PC being printed for multiple trace events. It also isn't portable as userland has no way to access the VCPU data structure when interpreting the trace record itself. Lets save the actual PC in the structure so that the correct value is accessible later. Fixes: 669e846e6c4e ("KVM/MIPS32: MIPS arch specific APIs for KVM") Signed-off-by: James Hogan <james.hogan@imgtec.com> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Gleb Natapov <gleb@kernel.org> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: linux-mips@linux-mips.org Cc: kvm@vger.kernel.org Cc: <stable@vger.kernel.org> # v3.10+ Acked-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2015-03-02KVM: SVM: fix interrupt injection (apic->isr_count always 0)Radim Krčmář2-8/+2
In commit b4eef9b36db4, we started to use hwapic_isr_update() != NULL instead of kvm_apic_vid_enabled(vcpu->kvm). This didn't work because SVM had it defined and "apicv" path in apic_{set,clear}_isr() does not change apic->isr_count, because it should always be 1. The initial value of apic->isr_count was based on kvm_apic_vid_enabled(vcpu->kvm), which is always 0 for SVM, so KVM could have injected interrupts when it shouldn't. Fix it by implicitly setting SVM's hwapic_isr_update to NULL and make the initial isr_count depend on hwapic_isr_update() for good measure. Fixes: b4eef9b36db4 ("kvm: x86: vmx: NULL out hwapic_isr_update() in case of !enable_apicv") Reported-and-tested-by: Borislav Petkov <bp@suse.de> Signed-off-by: Radim Krčmář <rkrcmar@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2015-03-02Merge tag 'metag-fixes-v4.0-1' of ↵Linus Torvalds1-2/+2
git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag Pull arch/metag fix from James Hogan: "This is just a single patch to fix the KSTK_EIP() and KSTK_ESP() macros for metag which have always been erronously returning the PC and stack pointer of the task's kernel context rather than from its user context saved at entry from userland into the kernel, which affects the contents of /proc/<pid>/maps and /proc/<pid>/stat" * tag 'metag-fixes-v4.0-1' of git://git.kernel.org/pub/scm/linux/kernel/git/jhogan/metag: metag: Fix KSTK_EIP() and KSTK_ESP() macros
2015-03-02s390/mm: fix incorrect ASCE after crst_table_downgradeMartin Schwidefsky1-1/+1
The switch_mm function does nothing in case the prev and next mm are the same. It can happen that a crst_table_downgrade has changed the top-level pgd in the meantime on a different CPU. Always store the new ASCE to be picked up in entry.S. [heiko.carstens@de.ibm.com]: Bug was introduced with git commit 53e857f30867 ("s390/mm,tlb: race of lazy TLB flush vs. recreation of TLB entries") and causes random crashes due to broken page tables being used. Reported-by: Dominik Vogt <vogt@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2015-03-02s390/ftrace: fix crashes when switching tracers / add notrace to cpu_relax()Heiko Carstens1-1/+1
With git commit 4d92f50249eb ("s390: reintroduce diag 44 calls for cpu_relax()") I reintroduced a non-trivial cpu_relax() variant on s390. The difference to the previous variant however is that the new version is an out-of-line function, which will be traced if function tracing is enabled. Switching to different tracers includes instruction patching. Therefore this is done within stop_machine() "context" to prevent that any function tracing is going on while instructions are being patched. With the new out-of-line variant of cpu_relax() this is not true anymore, since cpu_relax() gets called in a busy loop by all waiting cpus within stop_machine() until function patching is finished. Therefore cpu_relax() must be marked notrace. This fixes kernel crashes when frequently switching between "function" and "function_graph" tracers. Moving cpu_relax() to a header file again, doesn't work because of header include order dependencies. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2015-03-01ARM: OMAP4+: PRM: fix omap4 version of prm_save_and_clear_irqenTero Kristo1-2/+2
This was incorrectly reading the irq status registers during the save and clear, instead of the irq enable. This worked because there is only one user for the prcm interrupts currently, namely the io-chain. Whenever the function was called, an io-chain interrupt was both pending and enabled. Signed-off-by: Tero Kristo <t-kristo@ti.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Tony Lindgren <tony@atomide.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
2015-03-01ARM: OMAP2+: hwmod: fix deassert hardreset clkdm usecountingTero Kristo1-5/+4
Deasserting hardreset increases the usecount for the hwmod parent clockdomain always, however usecount is only decreased at end in certain error cases. This causes software supervised clockdomains to remain always on, preventing idle. Fixed by always releasing the hwmods clockdomain parent when exiting the function. Signed-off-by: Tero Kristo <t-kristo@ti.com> Tested-by: Carlos Hernandez <ceh@ti.com> Cc: Paul Walmsley <paul@pwsan.com> Cc: Tony Lindgren <tony@atomide.com> Signed-off-by: Paul Walmsley <paul@pwsan.com>
2015-03-01Merge branch 'x86-urgent-for-linus' of ↵Linus Torvalds3-3/+9
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull x86 fixes from Ingo Molnar: "A CR4-shadow 32-bit init fix, plus two typo fixes" * 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86: Init per-cpu shadow copy of CR4 on 32-bit CPUs too x86/platform/intel-mid: Fix trivial printk message typo in intel_mid_arch_setup() x86/cpu/intel: Fix trivial typo in intel_tlb_table[]
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