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* MIPS: Oprofile: Fix Loongson irq handlerWu Zhangjin2010-05-15
| | | | | | | | | | | | | | The interrupt enable bit for the performance counters is in the Control Register $24, not in the counter register. loongson2_perfcount_handler(), we need to use Reported-by: Xu Hengyang <hengyang@mail.ustc.edu.cn> Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Cc: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/1198/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> ---
* MIPS: N32: Use compat version for sys_ppoll.Chandrakala Chavva2010-05-15
| | | | | | | | | | | | The sys_ppoll() takes struct 'struct timespec'. This is different for the N32 and N64 ABIs. Use the compat version to do the proper conversions. Signed-off-by: David Daney <ddaney@caviumnetworks.com> To: linux-mips@linux-mips.org Patchwork: http://patchwork.linux-mips.org/patch/1210/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> ---
* MIPS FPU emulator: allow Cause bits of FCSR to be writeable by ctc1Shane McDonald2010-05-15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In the FPU emulator code of the MIPS, the Cause bits of the FCSR register are not currently writeable by the ctc1 instruction. In odd corner cases, this can cause problems. For example, a case existed where a divide-by-zero exception was generated by the FPU, and the signal handler attempted to restore the FPU registers to their state before the exception occurred. In this particular setup, writing the old value to the FCSR register would cause another divide-by-zero exception to occur immediately. The solution is to change the ctc1 instruction emulator code to allow the Cause bits of the FCSR register to be writeable. This is the behaviour of the hardware that the code is emulating. This problem was found by Shane McDonald, but the credit for the fix goes to Kevin Kissell. In Kevin's words: I submit that the bug is indeed in that ctc_op: case of the emulator. The Cause bits (17:12) are supposed to be writable by that instruction, but the CTC1 emulation won't let them be updated by the instruction. I think that actually if you just completely removed lines 387-388 [...] things would work a good deal better. At least, it would be a more accurate emulation of the architecturally defined FPU. If I wanted to be really, really pedantic (which I sometimes do), I'd also protect the reserved bits that aren't necessarily writable. Signed-off-by: Shane McDonald <mcdonald.shane@gmail.com> To: anemo@mba.ocn.ne.jp To: kevink@paralogos.com To: sshtylyov@mvista.com Patchwork: http://patchwork.linux-mips.org/patch/1205/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> ---
* Merge master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2010-05-15
|\ | | | | | | | | | | | | | | | | | | | | * master.kernel.org:/home/rmk/linux-2.6-arm: ARM: 6126/1: ARM mpcore_wdt: fix build failure and other fixes ARM: 6125/1: ARM TWD: move TWD registers to common header ARM: 6110/1: Fix Thumb-2 kernel builds when UACCESS_WITH_MEMCPY is enabled ARM: 6112/1: Use the Inner Shareable I-cache and BTB ops on ARMv7 SMP ARM: 6111/1: Implement read/write for ownership in the ARMv6 DMA cache ops ARM: 6106/1: Implement copy_to_user_page() for noMMU ARM: 6105/1: Fix the __arm_ioremap_caller() definition in nommu.c
| * ARM: 6125/1: ARM TWD: move TWD registers to common headerSrinidhi Kasagar2010-05-12
| | | | | | | | | | | | | | | | | | This moves the TWD register set of MPcore to a common existing file so that watchdog driver can access it Signed-off-by: srinidhi kasagar <srinidhi.kasagar@stericsson.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * ARM: 6110/1: Fix Thumb-2 kernel builds when UACCESS_WITH_MEMCPY is enabledCatalin Marinas2010-05-08
| | | | | | | | | | | | | | | | | | | | | | | | The patch adds the ENDPROC declarations for the __copy_to_user_std and __clear_user_std functions. Without these, the compiler generates BXL to ARM when compiling the kernel in Thumb-2 mode. Reported-by: Kyungmin Park <kmpark@infradead.org> Tested-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Acked-by: Nicolas Pitre <nico@fluxnic.net> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * ARM: 6112/1: Use the Inner Shareable I-cache and BTB ops on ARMv7 SMPCatalin Marinas2010-05-08
| | | | | | | | | | | | | | | | | | | | The standard I-cache Invalidate All (ICIALLU) and Branch Predication Invalidate All (BPIALL) operations are not automatically broadcast to the other CPUs in an ARMv7 MP system. The patch adds the Inner Shareable variants, ICIALLUIS and BPIALLIS, if ARMv7 and SMP. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * ARM: 6111/1: Implement read/write for ownership in the ARMv6 DMA cache opsCatalin Marinas2010-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | The Snoop Control Unit on the ARM11MPCore hardware does not detect the cache operations and the dma_cache_maint*() functions may leave stale cache entries on other CPUs. The solution implemented in this patch performs a Read or Write For Ownership in the ARMv6 DMA cache maintenance functions. These LDR/STR instructions change the cache line state to shared or exclusive so that the cache maintenance operation has the desired effect. Tested-by: George G. Davis <gdavis@mvista.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * ARM: 6106/1: Implement copy_to_user_page() for noMMUCatalin Marinas2010-05-08
| | | | | | | | | | | | | | | | | | Commit 7959722 introduced calls to copy_(to|from)_user_page() from access_process_vm() in mm/nommu.c. The copy_to_user_page() was not implemented on noMMU ARM. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * ARM: 6105/1: Fix the __arm_ioremap_caller() definition in nommu.cCatalin Marinas2010-05-08
| | | | | | | | | | | | | | | | Commit 31aa8fd6 introduced the __arm_ioremap_caller() function but the nommu.c version did not have the _caller suffix. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2010-05-15
|\ \ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, mrst: Don't blindly access extended config space
| * | x86, mrst: Don't blindly access extended config spaceH. Peter Anvin2010-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Do not blindly access extended configuration space unless we actively know we're on a Moorestown platform. The fixed-size BAR capability lives in the extended configuration space, and thus is not applicable if the configuration space isn't appropriately sized. This fixes booting certain VMware configurations with CONFIG_MRST=y. Moorestown will add a fake PCI-X 266 capability to advertise the presence of extended configuration space. Reported-and-tested-by: Petr Vandrovec <petr@vandrovec.name> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Acked-by: Jacob Pan <jacob.jun.pan@intel.com> Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org> LKML-Reference: <AANLkTiltKUa3TrKR1M51eGw8FLNoQJSLT0k0_K5X3-OJ@mail.gmail.com>
* | | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2010-05-14
|\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: x86, cacheinfo: Turn off L3 cache index disable feature in virtualized environments x86, k8: Fix build error when K8_NB is disabled x86, amd: Check X86_FEATURE_OSVW bit before accessing OSVW MSRs x86: Fix fake apicid to node mapping for numa emulation
| * | x86, cacheinfo: Turn off L3 cache index disable feature in virtualized ↵Frank Arnold2010-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | environments When running a quest kernel on xen we get: BUG: unable to handle kernel NULL pointer dereference at 0000000000000038 IP: [<ffffffff8142f2fb>] cpuid4_cache_lookup_regs+0x2ca/0x3df PGD 0 Oops: 0000 [#1] SMP last sysfs file: CPU 0 Modules linked in: Pid: 0, comm: swapper Tainted: G W 2.6.34-rc3 #1 /HVM domU RIP: 0010:[<ffffffff8142f2fb>] [<ffffffff8142f2fb>] cpuid4_cache_lookup_regs+0x 2ca/0x3df RSP: 0018:ffff880002203e08 EFLAGS: 00010046 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000060 RDX: 0000000000000000 RSI: 0000000000000040 RDI: 0000000000000000 RBP: ffff880002203ed8 R08: 00000000000017c0 R09: ffff880002203e38 R10: ffff8800023d5d40 R11: ffffffff81a01e28 R12: ffff880187e6f5c0 R13: ffff880002203e34 R14: ffff880002203e58 R15: ffff880002203e68 FS: 0000000000000000(0000) GS:ffff880002200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: 0000000000000038 CR3: 0000000001a3c000 CR4: 00000000000006f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Process swapper (pid: 0, threadinfo ffffffff81a00000, task ffffffff81a44020) Stack: ffffffff810d7ecb ffff880002203e20 ffffffff81059140 ffff880002203e30 <0> ffffffff810d7ec9 0000000002203e40 000000000050d140 ffff880002203e70 <0> 0000000002008140 0000000000000086 ffff880040020140 ffffffff81068b8b Call Trace: <IRQ> [<ffffffff810d7ecb>] ? sync_supers_timer_fn+0x0/0x1c [<ffffffff81059140>] ? mod_timer+0x23/0x25 [<ffffffff810d7ec9>] ? arm_supers_timer+0x34/0x36 [<ffffffff81068b8b>] ? hrtimer_get_next_event+0xa7/0xc3 [<ffffffff81058e85>] ? get_next_timer_interrupt+0x19a/0x20d [<ffffffff8142fa23>] get_cpu_leaves+0x5c/0x232 [<ffffffff8106a7b1>] ? sched_clock_local+0x1c/0x82 [<ffffffff8106a9a0>] ? sched_clock_tick+0x75/0x7a [<ffffffff8107748c>] generic_smp_call_function_single_interrupt+0xae/0xd0 [<ffffffff8101f6ef>] smp_call_function_single_interrupt+0x18/0x27 [<ffffffff8100a773>] call_function_single_interrupt+0x13/0x20 <EOI> [<ffffffff8143c468>] ? notifier_call_chain+0x14/0x63 [<ffffffff810295c6>] ? native_safe_halt+0xc/0xd [<ffffffff810114eb>] ? default_idle+0x36/0x53 [<ffffffff81008c22>] cpu_idle+0xaa/0xe4 [<ffffffff81423a9a>] rest_init+0x7e/0x80 [<ffffffff81b10dd2>] start_kernel+0x40e/0x419 [<ffffffff81b102c8>] x86_64_start_reservations+0xb3/0xb7 [<ffffffff81b103c4>] x86_64_start_kernel+0xf8/0x107 Code: 14 d5 40 ff ae 81 8b 14 02 31 c0 3b 15 47 1c 8b 00 7d 0e 48 8b 05 36 1c 8b 00 48 63 d2 48 8b 04 d0 c7 85 5c ff ff ff 00 00 00 00 <8b> 70 38 48 8d 8d 5c ff ff ff 48 8b 78 10 ba c4 01 00 00 e8 eb RIP [<ffffffff8142f2fb>] cpuid4_cache_lookup_regs+0x2ca/0x3df RSP <ffff880002203e08> CR2: 0000000000000038 ---[ end trace a7919e7f17c0a726 ]--- The L3 cache index disable feature of AMD CPUs has to be disabled if the kernel is running as guest on top of a hypervisor because northbridge devices are not available to the guest. Currently, this fixes a boot crash on top of Xen. In the future this will become an issue on KVM as well. Check if northbridge devices are present and do not enable the feature if there are none. [ hpa: backported to 2.6.34 ] Signed-off-by: Frank Arnold <frank.arnold@amd.com> LKML-Reference: <1271945222-5283-3-git-send-email-bp@amd64.org> Acked-by: Borislav Petkov <borislav.petkov@amd.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: <stable@kernel.org>
| * | x86, k8: Fix build error when K8_NB is disabledBorislav Petkov2010-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | K8_NB depends on PCI and when the last is disabled (allnoconfig) we fail at the final linking stage due to missing exported num_k8_northbridges. Add a header stub for that. Signed-off-by: Borislav Petkov <borislav.petkov@amd.com> LKML-Reference: <20100503183036.GJ26107@aftab> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: <stable@kernel.org>
| * | x86, amd: Check X86_FEATURE_OSVW bit before accessing OSVW MSRsAndreas Herrmann2010-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If host CPU is exposed to a guest the OSVW MSRs are not guaranteed to be present and a GP fault occurs. Thus checking the feature flag is essential. Cc: <stable@kernel.org> # .32.x .33.x Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> LKML-Reference: <20100427101348.GC4489@alberich.amd.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
| * | x86: Fix fake apicid to node mapping for numa emulationDavid Rientjes2010-05-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With NUMA emulation, it's possible for a single cpu to be bound to multiple nodes since more than one may have affinity if allocated on a physical node that is local to the cpu. APIC ids must therefore be mapped to the lowest node ids to maintain generic kernel use of functions such as cpu_to_node() that determine device affinity. For example, if a device has proximity to physical node 1, for instance, and a cpu happens to be mapped to a higher emulated node id 8, the proximity may not be correctly determined by comparison in generic code even though the cpu may be truly local and allocated on physical node 1. When this happens, the true topology of the machine isn't accurately represented in the emulated environment; although this isn't critical to the system's uptime, any generic code that is NUMA aware benefits from the physical topology being accurately represented. This can affect any system that maps multiple APIC ids to a single node and is booted with numa=fake=N where N is greater than the number of physical nodes. Signed-off-by: David Rientjes <rientjes@google.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Suresh Siddha <suresh.b.siddha@intel.com> LKML-Reference: <alpine.DEB.2.00.1005060224140.19473@chino.kir.corp.google.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'davinci-fixes-for-linus-2' of ↵Linus Torvalds2010-05-14
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci * 'davinci-fixes-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci: DA830: fix USB 2.0 clock entry
| * | | DA830: fix USB 2.0 clock entrySergei Shtylyov2010-05-14
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | DA8xx OHCI driver fails to load due to failing clk_get() call for the USB 2.0 clock. Arrange matching USB 2.0 clock by the clock name instead of the device. (Adding another CLK() entry for "ohci.0" device won't do -- in the future I'll also have to enable USB 2.0 clock to configure CPPI 4.1 module, in which case I won't have any device at all.) Signed-off-by: Sergei Shtylyov <sshtylyov@ru.mvista.com> Signed-off-by: Kevin Hilman <khilman@deeprootsystems.com>
* | | Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds2010-05-14
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze: microblaze: Fix module loading on system with WB cache microblaze: export assembly functions used by modules microblaze: Remove powerpc code from Microblaze port microblaze: Remove compilation warnings in cache macro microblaze: export assembly functions used by modules microblaze: fix get_user/put_user side-effects microblaze: re-enable interrupts before calling schedule
| * | | microblaze: Fix module loading on system with WB cacheMichal Simek2010-05-14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | There is necessary to flush whole dcache. Icache work should be done in kernel/module.c. Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: export assembly functions used by modulesMichal Simek2010-05-13
| | | | | | | | | | | | | | | | | | | | | | | | Export __strncpy_user, memory_size, ioremap_bot for modules. Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: Remove powerpc code from Microblaze portMichal Simek2010-05-13
| | | | | | | | | | | | | | | | | | | | | | | | Remove eeh_add_device_tree_late which is powerpc specific code. Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: Remove compilation warnings in cache macroMichal Simek2010-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CC arch/microblaze/kernel/cpu/cache.o arch/microblaze/kernel/cpu/cache.c: In function '__invalidate_dcache_range_wb': arch/microblaze/kernel/cpu/cache.c:398: warning: ISO C90 forbids mixed declarations and code arch/microblaze/kernel/cpu/cache.c: In function '__flush_dcache_range_wb': arch/microblaze/kernel/cpu/cache.c:509: warning: ISO C90 forbids mixed declara Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: export assembly functions used by modulesSteven J. Magnani2010-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Modules that use copy_{to,from}_user(), memcpy(), and memset() fail to build in certain circumstances. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: fix get_user/put_user side-effectsSteven J. Magnani2010-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The Microblaze implementations of get_user() and (MMU) put_user() evaluate the address argument more than once. This causes unexpected side-effects for invocations that include increment operators, i.e. get_user(foo, bar++). This patch also removes the distinction between MMU and noMMU put_user(). Without the patch: $ echo 1234567890 > /proc/sys/kernel/core_pattern $ cat /proc/sys/kernel/core_pattern 12345 Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
| * | | microblaze: re-enable interrupts before calling scheduleSteven J. Magnani2010-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | schedule() should not be called with interrupts disabled. Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Signed-off-by: Michal Simek <monstr@monstr.eu>
* | | | KVM: PPC: Keep index within boundaries in kvmppc_44x_emul_tlbwe()Roel Kluin2010-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | An index of KVM44x_GUEST_TLB_SIZE is already one too large. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Acked-by: Hollis Blanchard <hollis@penguinppc.org> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* | | | KVM: VMX: blocked-by-sti must not defer NMI injectionsJan Kiszka2010-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As the processor may not consider GUEST_INTR_STATE_STI as a reason for blocking NMI, it could return immediately with EXIT_REASON_NMI_WINDOW when we asked for it. But as we consider this state as NMI-blocking, we can run into an endless loop. Resolve this by allowing NMI injection if just GUEST_INTR_STATE_STI is active (originally suggested by Gleb). Intel confirmed that this is safe, the processor will never complain about NMI injection in this state. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> KVM-Stable-Tag Acked-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* | | | KVM: x86: Call vcpu_load and vcpu_put in cpuid_updateDongxiao Xu2010-05-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cpuid_update may operate VMCS, so vcpu_load() and vcpu_put() should be called to ensure correctness. Signed-off-by: Dongxiao Xu <dongxiao.xu@intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
* | | | KVM: SVM: Fix wrong intercept masks on 32 bitJoerg Roedel2010-05-13
|/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes KVM on 32 bit SVM working again by correcting the masks used for iret interception. With the wrong masks the upper 32 bits of the intercepts are masked out which leaves vmrun unintercepted. This is not legal on svm and the vmrun fails. Bug was introduced by commits 95ba827313 and 3cfc3092. Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
* | | Merge branch 'merge' of ↵Linus Torvalds2010-05-12
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc * 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: powerpc/perf_event: Fix oops due to perf_event_do_pending call powerpc/swiotlb: Fix off by one in determining boundary of which ops to use
| * \ \ Merge commit 'kumar/merge' into mergeBenjamin Herrenschmidt2010-05-12
| |\ \ \
| | * | | powerpc/swiotlb: Fix off by one in determining boundary of which ops to useKumar Gala2010-05-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we compare the devices DMA mask to the amount of memory we need to make sure we treat the DMA mask as an address boundary. For example if the DMA_MASK(32) and we have 4G of memory we'd incorrectly set the dma ops to swiotlb. We need to add one to the dma mask when we convert it. Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
| * | | | powerpc/perf_event: Fix oops due to perf_event_do_pending callPaul Mackerras2010-05-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Anton Blanchard found that large POWER systems would occasionally crash in the exception exit path when profiling with perf_events. The symptom was that an interrupt would occur late in the exit path when the MSR[RI] (recoverable interrupt) bit was clear. Interrupts should be hard-disabled at this point but they were enabled. Because the interrupt was not recoverable the system panicked. The reason is that the exception exit path was calling perf_event_do_pending after hard-disabling interrupts, and perf_event_do_pending will re-enable interrupts. The simplest and cleanest fix for this is to use the same mechanism that 32-bit powerpc does, namely to cause a self-IPI by setting the decrementer to 1. This means we can remove the tests in the exception exit path and raw_local_irq_restore. This also makes sure that the call to perf_event_do_pending from timer_interrupt() happens within irq_enter/irq_exit. (Note that calling perf_event_do_pending from timer_interrupt does not mean that there is a possible 1/HZ latency; setting the decrementer to 1 ensures that the timer interrupt will happen immediately, i.e. within one timebase tick, which is a few nanoseconds or 10s of nanoseconds.) Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: stable@kernel.org Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | | | | [S390] correct address of _stext with CONFIG_SHARED_KERNEL=yMartin Schwidefsky2010-05-12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | As of git commit 1844c9bc0b2fed3023551c1affe033ab38e90b9a head64.S/head31.S are not included in head.S anymore but build as an extra object. This breaks shared kernel support because the .org statement in head64.S/head31.S for CONFIG_SHARED_KERNEL=y will have a different effect. The end address of the head.text section in head.o will be added to the .org value, to compensate for this subtract 0x11000 to get the required value of 0x100000 again. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | | | [S390] ptrace: fix return value of do_syscall_trace_enter()Gerald Schaefer2010-05-12
|/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | strace may change the system call number, so regs->gprs[2] must not be read before tracehook_report_syscall_entry(). This fixes a bug where "strace -f" will hang after a vfork(). Cc: <stable@kernel.org> Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
* | | | Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds2010-05-11
|\ \ \ \ | |_|/ / |/| | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: kprobes/x86: Fix removed int3 checking order perf: Fix static strings treated like dynamic ones
| * | | kprobes/x86: Fix removed int3 checking orderMasami Hiramatsu2010-05-11
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix kprobe/x86 to check removed int3 when failing to get kprobe from hlist. Since we have a time window between checking int3 exists on probed address and getting kprobe on that address, we can have following scenario: ------- CPU1 CPU2 hit int3 check int3 exists remove int3 remove kprobe from hlist get kprobe from hlist no kprobe->OOPS! ------- This patch moves int3 checking if there is no kprobe on that address for fixing this problem as follows: ------ CPU1 CPU2 hit int3 remove int3 remove kprobe from hlist get kprobe from hlist no kprobe->check int3 exists ->rollback&retry ------ Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Dave Anderson <anderson@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20100427223348.2322.9112.stgit@localhost6.localdomain6> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* | | Merge branch 'v4l_for_2.6.34' of ↵Linus Torvalds2010-05-07
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6 * 'v4l_for_2.6.34' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: V4L/DVB: pxa_camera: move fifo reset direct before dma start V4L/DVB: video: testing unsigned for less than 0 V4L/DVB: mx1-camera: compile fix V4L/DVB: budget: Oops: "BUG: unable to handle kernel NULL pointer dereference" V4L/DVB: ngene: Workaround for stuck DiSEqC pin V4L/DVB: saa7146: fix regression of the av7110/budget-av driver V4L/DVB: v4l: fix config dependencies: mxb and saa7191 are V4L2 drivers, not V4L1 V4L/DVB: feature-removal: announce videotext.h removal V4L/DVB: V4L - vpfe capture - fix for kernel crash V4L/DVB: gspca: make usb id 0461:0815 get handled by the right driver V4L/DVB: gspca - stv06xx: Remove the 046d:08da from the stv06xx driver V4L/DVB: gspca - sn9c20x: Correct onstack wait_queue_head declaration V4L/DVB: saa7146: fix up bytesperline if it is an impossible value V4L/DVB: V4L: vpfe_capture - free ccdc_lock when memory allocation fails V4L/DVB: V4L - Makfile:Removed duplicate entry of davinci V4L/DVB: omap24xxcam: potential buffer overflow
| * | | V4L/DVB: mx1-camera: compile fixUwe Kleine-König2010-05-06
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a regression of 7d58289 (mx1: prefix SOC specific defines with MX1_ and deprecate old names) Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
* | | Merge branch 'for-linus' of git://git.monstr.eu/linux-2.6-microblazeLinus Torvalds2010-05-06
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://git.monstr.eu/linux-2.6-microblaze: microblaze: Defconfig update microblaze: Optimize CACHE_LOOP_LIMITS and CACHE_RANGE_LOOP macros microblaze: Fix consistent-sync code microblaze: Define correct L1_CACHE_SHIFT value microblaze: cpuinfo shows cache line length microblaze: Fix kmalloc alignment on non-coherent DMA platforms microblaze: Fix typo fault in cache code microblaze: Fix consistent code microblaze: pci-dma: use include/linux/dma-mapping.h microblaze: page.h: Remove get_user_page and free_user_page microblaze: Remove "cache" optimized copy_page function microblaze: invoke oom-killer from page fault microblaze: fix divide by zero exception message microblaze: Add isa_dma_bridge_buggy to dma.h microblaze: Remove ancient code microblaze: Quiet section mismatch warnings for MMU version microblaze: Quiet section mismatch warnings microblaze: Fix IRQ entry/exit ftracing microblaze: resource/PCI: align functions now return start of resource microblaze: PCI: add pci_bus_for_each_resource(), remove direct bus->resource[] refs
| * | | microblaze: Defconfig updateMichal Simek2010-05-06
| | | | | | | | | | | | | | | | Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: Optimize CACHE_LOOP_LIMITS and CACHE_RANGE_LOOP macrosMichal Simek2010-05-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. Remove CACHE_ALL_LOOP2 macro because it is identical to CACHE_ALL_LOOP 2. Change BUG_ON to WARN_ON 3. Remove end aligned from CACHE_LOOP_LIMITS. C implementation do not need aligned end address and ASM code do aligned in their macros 4. ASM optimized CACHE_RANGE_LOOP_1/2 macros needs to get aligned end address. Because end address is compound from start + size, end address is the first address which is exclude. Here is the corresponding code which describe it. + int align = ~(line_length - 1); + end = ((end & align) == end) ? end - line_length : end & align; a) end is aligned: it is necessary to subtruct line length because we don't want to work with next cacheline b) end address is not aligned: Just align it to be ready for ASM code. Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: Fix consistent-sync codeMichal Simek2010-05-06
| | | | | | | | | | | | | | | | | | | | | | | | PCI_DMA_FROMDEVICE should call invalidation not flushing. Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: Define correct L1_CACHE_SHIFT valueMichal Simek2010-05-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Microblaze cacheline length is configurable and current cpu uses two cacheline length 4 and 8. We are taking conservative maximum value to be sure that cacheline alignment is satisfied for all cases. Here is the calculation for cacheline lenght 8 32bit=4Byte values which is corresponding with SHIFT 5. Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: cpuinfo shows cache line lengthMichal Simek2010-05-06
| | | | | | | | | | | | | | | | | | | | | | | | Show cache line length in /proc/cpuinfo. Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: Fix kmalloc alignment on non-coherent DMA platformsMichal Simek2010-05-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Based on PowerPC patche 52142e756e9bf6485d3d53596e8aff2e816a7253 PowerPC description: On platforms doing non-coherent DMA (4xx, 8xx, ...), it's important that the kmalloc minimum alignment is set to the cache line size, to avoid sharing cache lines between different objects, so that DMA to one of the objects doesn't corrupt the other. Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: Fix typo fault in cache codeMichal Simek2010-05-06
| | | | | | | | | | | | | | | | | | | | | | | | Copy & paste error. Signed-off-by: Michal Simek <monstr@monstr.eu>
| * | | microblaze: Fix consistent codeMichal Simek2010-05-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fix consistent code which had problems with consistent_free function. I am not sure if we need to call flush_tlb_all after it but it keeps tlbs synced. I added noMMU and MMU version together. Uncached shadow feature is not tested. Signed-off-by: Michal Simek <monstr@monstr.eu>
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