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* perf_counter: Separate out attr->type from attr->configIngo Molnar2009-06-06
| | | | | | | | | | | | | | | | | | | | | | | | | Counter type is a frequently used value and we do a lot of bit juggling by encoding and decoding it from attr->config. Clean this up by creating a separate attr->type field. Also clean up the various similarly complex user-space bits all around counter attribute management. The net improvement is significant, and it will be easier to add a new major type (which is what triggered this cleanup). (This changes the ABI, all tools are adapted.) (PowerPC build-tested.) Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: Set context.vdso before installing the mappingPeter Zijlstra2009-06-05
| | | | | | | | | | | | | | | | In order to make arch_vma_name() work from inside install_special_mapping() we need to set the context.vdso before calling it. ( This is needed for performance counters to be able to track this special executable area. ) Signed-off-by: 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> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: powerpc: Use new identifier names in powerpc-specific codePaul Mackerras2009-06-04
| | | | | | | | | | | | | | Commit b23f3325 ("perf_counter: Rename various fields") fixed up most of the uses of the renamed fields, but missed one instance of "record_type" in powerpc-specific code which needs to be changed to "sample_type", and a "PERF_RECORD_ADDR" in the same statement that needs to be changed to "PERF_SAMPLE_ADDR", causing compilation errors on powerpc. This fixes it. Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> LKML-Reference: <18983.3111.770392.800486@cargo.ozlabs.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: Fix throttling lock-upIngo Molnar2009-06-03
| | | | | | | | | | | | | | | | | | | | | Throttling logic is broken and we can lock up with too small hw sampling intervals. Make the throttling code more robust: disable counters even if we already disabled them. ( Also clean up whitespace damage i noticed while reading various pieces of code related to throttling. ) Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: powerpc: Fix race causing "oops trying to read PMC0" errorsPaul Mackerras2009-06-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When using interrupting counters and limited (non-interrupting) counters at the same time, it's possible that we get an interrupt in write_mmcr0() after writing MMCR0 but before we have set up the counters using limited PMCs. What happens then is that we get into perf_counter_interrupt() with counter->hw.idx = 0 for the limited counters, leading to the "oops trying to read PMC0" error message being printed. This fixes the problem by making perf_counter_interrupt() robust against counter->hw.idx being zero (the counter is just ignored in that case) and also by changing write_mmcr0() to write MMCR0 initially with the counter overflow interrupt enable bits masked (set to 0). If the MMCR0 value requested by the caller has either of those bits set, we write MMCR0 again with the requested value of those bits after setting up the limited counters properly. Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: John Kacur <jkacur@redhat.com> Cc: Stephane Eranian <eranian@googlemail.com> LKML-Reference: <18982.17684.138182.954599@cargo.ozlabs.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: powerpc: Fix event alternative code generation on POWER5/5+Paul Mackerras2009-06-03
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit ef923214 ("perf_counter: powerpc: use u64 for event codes internally") introduced a bug where the return value from function find_alternative_bdecode gets put into a u64 variable and later tested to see if it is < 0. The effect is that we get extra, bogus event code alternatives on POWER5 and POWER5+, leading to error messages such as "oops compute_mmcr failed" being printed and counters not counting properly. This fixes it by using s64 for the return type of find_alternative_bdecode and for the local variable that the caller puts the value in. It also makes the event argument a u64 on POWER5+ for consistency. Signed-off-by: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: John Kacur <jkacur@redhat.com> Cc: Stephane Eranian <eranian@googlemail.com> LKML-Reference: <18982.17586.666132.90983@cargo.ozlabs.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter/x86: Remove the IRQ (non-NMI) handling bitsYong Wang2009-06-03
| | | | | | | | | | | | | | | Remove the IRQ (non-NMI) handling bits as NMI will be used always. Signed-off-by: Yong Wang <yong.y.wang@intel.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: John Kacur <jkacur@redhat.com> LKML-Reference: <20090603051255.GA2791@ywang-moblin2.bj.intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: Rename perf_counter_hw_event => perf_counter_attrPeter Zijlstra2009-06-02
| | | | | | | | | | | | | | | | | The structure isn't hw only and when I read event, I think about those things that fall out the other end. Rename the thing. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: John Kacur <jkacur@redhat.com> Cc: Stephane Eranian <eranian@googlemail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: x86: Emulate longer sample periodsPeter Zijlstra2009-06-02
| | | | | | | | | | | | | | | | | | | | | Do as Power already does, emulate sample periods up to 2^63-1 by composing them of smaller values limited by hardware capabilities. Only once we wrap the software period do we generate an overflow event. Just 10 lines of new code. Reported-by: Stephane Eranian <eranian@googlemail.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: John Kacur <jkacur@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: Remove the last nmi/irq bitsPeter Zijlstra2009-06-02
| | | | | | | | | | | | | | | | IRQ (non-NMI) sampling is not used anymore - remove the last few bits. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: John Kacur <jkacur@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* perf_counter: Rename various fieldsPeter Zijlstra2009-06-02
| | | | | | | | | | | | | | | | | | | | | | | A few renames: s/irq_period/sample_period/ s/irq_freq/sample_freq/ s/PERF_RECORD_/PERF_SAMPLE_/ s/record_type/sample_type/ And change both the new sample_type and read_format to u64. Reported-by: Stephane Eranian <eranian@googlemail.com> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com> Cc: Marcelo Tosatti <mtosatti@redhat.com> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: John Kacur <jkacur@redhat.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* Merge branch 'linus' into perfcounters/coreIngo Molnar2009-06-01
|\ | | | | | | | | | | | | Merge reason: merge almost-rc8 into perfcounters/core, which was -rc6 based - to pick up the latest upstream fixes. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: ignore VM_LOCKED when determining if hugetlb-backed page tables can be ↵Mel Gorman2009-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | shared or not Addresses http://bugzilla.kernel.org/show_bug.cgi?id=13302 On x86 and x86-64, it is possible that page tables are shared beween shared mappings backed by hugetlbfs. As part of this, page_table_shareable() checks a pair of vma->vm_flags and they must match if they are to be shared. All VMA flags are taken into account, including VM_LOCKED. The problem is that VM_LOCKED is cleared on fork(). When a process with a shared memory segment forks() to exec() a helper, there will be shared VMAs with different flags. The impact is that the shared segment is sometimes considered shareable and other times not, depending on what process is checking. What happens is that the segment page tables are being shared but the count is inaccurate depending on the ordering of events. As the page tables are freed with put_page(), bad pmd's are found when some of the children exit. The hugepage counters also get corrupted and the Total and Free count will no longer match even when all the hugepage-backed regions are freed. This requires a reboot of the machine to "fix". This patch addresses the problem by comparing all flags except VM_LOCKED when deciding if pagetables should be shared or not for hugetlbfs-backed mapping. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Acked-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Cc: Ingo Molnar <mingo@elte.hu> Cc: <stable@kernel.org> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: <starlight@binnacle.cx> Cc: Eric B Munson <ebmunson@us.ibm.com> Cc: Adam Litke <agl@us.ibm.com> Cc: Andy Whitcroft <apw@canonical.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * flat: fix data sections alignmentOskar Schirmer2009-05-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The flat loader uses an architecture's flat_stack_align() to align the stack but assumes word-alignment is enough for the data sections. However, on the Xtensa S6000 we have registers up to 128bit width which can be used from userspace and therefor need userspace stack and data-section alignment of at least this size. This patch drops flat_stack_align() and uses the same alignment that is required for slab caches, ARCH_SLAB_MINALIGN, or wordsize if it's not defined by the architecture. It also fixes m32r which was obviously kaput, aligning an uninitialized stack entry instead of the stack pointer. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Oskar Schirmer <os@emlix.com> Cc: David Howells <dhowells@redhat.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Bryan Wu <cooloney@kernel.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Cc: Greg Ungerer <gerg@uclinux.org> Signed-off-by: Johannes Weiner <jw@emlix.com> Acked-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * Merge branch 'for-linus' of ↵Linus Torvalds2009-05-27
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin: Blackfin: fix strncmp.o build error Blackfin: drop unneeded asm/.gitignore Blackfin: ignore generated vmlinux.lds MAINTAINERS: drop (subscribers-only) markings on Blackfin lists MAINTAINERS: update Blackfin items Blackfin: hook up preadv/pwritev syscalls
| | * Blackfin: fix strncmp.o build errorMike Frysinger2009-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix some more fallout of the string changes: CC arch/blackfin/lib/strncmp.o In file included from include/linux/bitmap.h:9, from include/linux/nodemask.h:90, from include/linux/mmzone.h:17, from include/linux/gfp.h:5, from include/linux/kmod.h:23, from include/linux/module.h:14, from arch/blackfin/lib/strncmp.c:14: include/linux/string.h: In function ‘strstarts’: include/linux/string.h:132: error: implicit declaration of function ‘strncmp’ make[1]: *** [arch/blackfin/lib/strncmp.o] Error 1 Signed-off-by: Mike Frysinger <vapier@gentoo.org> CC: Rusty Russell <rusty@rustcorp.com.au>
| | * Blackfin: drop unneeded asm/.gitignoreMike Frysinger2009-05-27
| | | | | | | | | | | | | | | | | | | | | We don't create a include/asm/mach/ symlink anymore, so we don't need the .gitignore for it. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| | * Blackfin: ignore generated vmlinux.ldsMike Frysinger2009-05-27
| | | | | | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| | * Blackfin: hook up preadv/pwritev syscallsMike Frysinger2009-05-27
| | | | | | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
| * | powerpc: Fix up dma_alloc_coherent() on platforms without cache coherency.Benjamin Herrenschmidt2009-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The implementation we just revived has issues, such as using a Kconfig-defined virtual address area in kernel space that nothing actually carves out (and thus will overlap whatever is there), or having some dependencies on being self contained in a single PTE page which adds unnecessary constraints on the kernel virtual address space. This fixes it by using more classic PTE accessors and automatically locating the area for consistent memory, carving an appropriate hole in the kernel virtual address space, leaving only the size of that area as a Kconfig option. It also brings some dma-mask related fixes from the ARM implementation which was almost identical initially but grew its own fixes. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powerpc: Minor cleanups of kernel virt address space definitionsBenjamin Herrenschmidt2009-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make FIXADDR_TOP a compile time constant and cleanup a couple of definitions relative to the layout of the kernel address space on ppc32. We also print out that layout at boot time for debugging purposes. This is a pre-requisite for properly fixing non-coherent DMA allocactions. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | powerpc: Move dma-noncoherent.c from arch/powerpc/lib to arch/powerpc/mmBenjamin Herrenschmidt2009-05-27
| | | | | | | | | | | | | | | | | | (pre-requisite to make the next patches more palatable) Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | Revert "powerpc: Rework dma-noncoherent to use generic vmalloc layer"Benjamin Herrenschmidt2009-05-26
| |/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit 33f00dcedb0e22cdb156a23632814fc580fcfcf8. While it was a good idea to try to use the mm/vmalloc.c allocator instead of our own (in fact, ours is itself a dup on an old variant of the vmalloc one), unfortunately, the approach is terminally busted since dma_alloc_coherent() can be called at interrupt time or in atomic contexts and there's little chances we'll make the code in mm/vmalloc.c cope with\ that :-( Until we can get the generic code to forbid that idiocy and fix all drivers abusing it, we pretty much have no choice but revert to our custom virtual space allocator. There's also a problem with SMP safety since freeing such mapping would require an IPI which cannot be done at interrupt time. However, right now, I don't think we support any platform that is both SMP and has non-coherent DMA (don't laugh, I know such things do exist !) so we can sort that out later. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2009-05-26
| |\ | | | | | | | | | | | | | | | | | | | | | 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: avoid back to back on_each_cpu in cpa_flush_array x86, relocs: ignore R_386_NONE in kernel relocation entries
| | * x86: avoid back to back on_each_cpu in cpa_flush_arrayPallipadi, Venkatesh2009-05-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | Cleanup cpa_flush_array() to avoid back to back on_each_cpu() calls. [ Impact: optimizes fix 0af48f42df15b97080b450d24219dd95db7b929a ] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| | * x86, relocs: ignore R_386_NONE in kernel relocation entriesTejun Heo2009-05-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For relocatable 32bit kernels, boot/compressed/relocs.c processes relocation entries in the kernel image and appends it to the kernel image such that boot/compressed/head_32.S can relocate the kernel. The kernel image is one statically linked object and only uses two relocation types - R_386_PC32 and R_386_32, of the two only the latter needs massaging during kernel relocation and thus handled by relocs. R_386_PC32 is ignored and all other relocation types are considered error. When the target of a relocation resides in a discarded section, binutils doesn't throw away the relocation record but nullifies it by changing it to R_386_NONE, which unfortunately makes relocs fail. The problem was triggered by yet out-of-tree x86 stack unwind patches but given the binutils behavior, ignoring R_386_NONE is the right thing to do. The problem has been tracked down to binutils behavior by Jan Beulich. [ Impact: fix build with certain binutils by ignoring R_386_NONE ] Signed-off-by: Tejun Heo <tj@kernel.org> Cc: Jan Beulich <JBeulich@novell.com> Cc: Ingo Molnar <mingo@elte.hu> LKML-Reference: <4A1B8150.40702@kernel.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | Merge branch 'fixes' of ↵Linus Torvalds2009-05-26
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [CPUFREQ] powernow-k8: determine exact CPU frequency for HW Pstates [CPUFREQ] powernow-k8 cleanup msg if BIOS does not export ACPI _PSS cpufreq data [CPUFREQ] fix timer teardown in ondemand governor [CPUFREQ] fix timer teardown in conservative governor [CPUFREQ] remove rwsem lock from CPUFREQ_GOV_STOP call [CPUFREQ] powernow-k7 build fix when ACPI=n [CPUFREQ] add atom family to p4-clockmod
| | * | [CPUFREQ] powernow-k8: determine exact CPU frequency for HW PstatesAndreas Herrmann2009-05-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Slightly modified by trenn@suse.de -> only do this on fam 10h and fam 11h. Currently powernow-k8 determines CPU frequency from ACPI PSS objects, but according to AMD family 11h BKDG this frequency is just a rounded value: "CoreFreq (MHz) = The CPU COF specified by MSRC001_00[6B:64][CpuFid] rounded to the nearest 100 Mhz." As a consequnce powernow-k8 reports wrong CPU frequency on some systems, e.g. on Turion X2 Ultra: powernow-k8: Found 1 AMD Turion(tm)X2 Ultra DualCore Mobile ZM-82 processors (2 cpu cores) (version 2.20.00) powernow-k8: 0 : pstate 0 (2200 MHz) powernow-k8: 1 : pstate 1 (1100 MHz) powernow-k8: 2 : pstate 2 (600 MHz) But this is wrong as frequency for Pstate2 is 550 MHz. x86info reports it correctly: #x86info -a |grep Pstate ... Pstate-0: fid=e, did=0, vid=24 (2200MHz) Pstate-1: fid=e, did=1, vid=30 (1100MHz) Pstate-2: fid=e, did=2, vid=3c (550MHz) (current) Solution is to determine the frequency directly from Pstate MSRs instead of using rounded values from ACPI table. Signed-off-by: Andreas Herrmann <andreas.herrmann3@amd.com> Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Dave Jones <davej@redhat.com>
| | * | [CPUFREQ] powernow-k8 cleanup msg if BIOS does not export ACPI _PSS cpufreq dataThomas Renninger2009-05-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Make the message shorter and easier to grep for - Use printk_once instead of WARN_ONCE (functionality of these was mixed) Signed-off-by: Thomas Renninger <trenn@suse.de> Cc: Langsdorf, Mark <mark.langsdorf@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
| | * | [CPUFREQ] powernow-k7 build fix when ACPI=nDave Jones2009-05-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | arch/x86/kernel/cpu/cpufreq/powernow-k7.c:172: warning: 'invalidate_entry' defined but not used Reported-by: Toralf Förster <toralf.foerster@gmx.de> Signed-off-by: Dave Jones <davej@redhat.com>
| | * | [CPUFREQ] add atom family to p4-clockmodJarod Wilson2009-05-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some atom procs don't do freq scaling (such as the atom 330 on my own littlefalls2 board). By adding the atom family here, we at least get the benefit of passive cooling in a thermal emergency. Not sure how to see that its actually helping any, but the driver does bind and claim its functioning on my atom 330. Signed-off-by: Jarod Wilson <jarod@redhat.com> Signed-off-by: Dave Jones <davej@redhat.com>
| * | | Merge branch 'merge' of ↵Linus Torvalds2009-05-26
| |\ \ \ | | |/ / | |/| | | | | | | | | | | | | | | | | | 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/mm: Fix broken MMU PID stealing on !SMP
| | * | powerpc/mm: Fix broken MMU PID stealing on !SMPHideo Saito2009-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The recent rework of the MMU PID handling for non-hash CPUs has a subtle bug in the !SMP "optimized" variant of the PID stealing function. It clears the PID in the mm context before it calls local_flush_tlb_mm(). However, the later will not flush anything if the PID in the context is clear... Signed-off-by: Hideo Saito <hsaito.ppc@gmail.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | | Merge branch 'kvm-updates/2.6.30' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2009-05-25
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | * 'kvm-updates/2.6.30' of git://git.kernel.org/pub/scm/virt/kvm/kvm: KVM: Fix PDPTR reloading on CR4 writes KVM: Make paravirt tlb flush also reload the PAE PDPTRs
| | * | | KVM: Fix PDPTR reloading on CR4 writesAvi Kivity2009-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The processor is documented to reload the PDPTRs while in PAE mode if any of the CR4 bits PSE, PGE, or PAE change. Linux relies on this behaviour when zapping the low mappings of PAE kernels during boot. The code already handled changes to CR4.PAE; augment it to also notice changes to PSE and PGE. This triggered while booting an F11 PAE kernel; the futex initialization code runs before any CR3 reloads and writes to a NULL pointer; the futex subsystem ended up uninitialized, killing PI futexes and pulseaudio which uses them. Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
| | * | | KVM: Make paravirt tlb flush also reload the PAE PDPTRsAvi Kivity2009-05-25
| | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The paravirt tlb flush may be used not only to flush TLBs, but also to reload the four page-directory-pointer-table entries, as it is used as a replacement for reloading CR3. Change the code to do the entire CR3 reloading dance instead of simply flushing the TLB. Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
| * | | Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2009-05-25
| |\ \ \ | | |/ / | |/| / | | |/ | | | | | | | | | | | | | | | | | | | | | | | | 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: Remove remap percpu allocator for the time being x86: cpa_flush_array wbinvd should be done on all CPUs x86: bugfix wbinvd() model check instead of family check x86: introduce noxsave boot parameter x86, setup: revert ACPI 3 E820 extended attributes support x86: DMI match for the Sony VGN-Z540N as it needs BIOS reboot
| | * x86: Remove remap percpu allocator for the time beingTejun Heo2009-05-24
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remap percpu allocator has subtle bug when combined with page attribute changing. Remap percpu allocator aliases PMD pages for the first chunk and as pageattr doesn't know about the alias it ends up updating page attributes of the original mapping thus leaving the alises in inconsistent state which might lead to subtle data corruption. Please read the following threads for more information: http://thread.gmane.org/gmane.linux.kernel/835783 The following is the proposed fix which teaches pageattr about percpu aliases. http://thread.gmane.org/gmane.linux.kernel/837157 However, the above changes are deemed too pervasive for upstream inclusion for 2.6.30 release, so this patch essentially disables the remap allocator for the time being. Signed-off-by: Tejun Heo <tj@kernel.org> LKML-Reference: <4A1A0A27.4050301@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| | * x86: cpa_flush_array wbinvd should be done on all CPUsvenkatesh.pallipadi@intel.com2009-05-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cpa_flush_array seems to prefer wbinvd() over clflush at 4M threshold. clflush needs to be done on only one CPU as per instruction definition. wbinvd() however, should be done on all CPUs. [ Impact: fix missing flush which could cause data corruption ] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| | * x86: bugfix wbinvd() model check instead of family checkvenkatesh.pallipadi@intel.com2009-05-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | wbinvd is supported on all CPUs 486 or later. But, pageattr.c is checking x86_model >= 4 before wbinvd(), which looks like an oversight bug. It was first introduced at one place by changeset d7c8f21a8cad0228c7c5ce2bb6dbd95d1ee49d13 and got copied over to second place in the same file later. [ Impact: fix missing cache flush on early-model CPUs, potential data corruption ] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| | * x86: introduce noxsave boot parameterSuresh Siddha2009-05-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce "noxsave" boot parameter which will disable the cpu's xsave/xrstor capabilities. Useful for debugging and working around xsave related issues. [ Impact: make it possible to debug problems in the field ] Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| | * x86, setup: revert ACPI 3 E820 extended attributes supportH. Peter Anvin2009-05-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove ACPI 3 E820 extended memory attributes support. At least one vendor actively set all the flags to zero, but left ECX on return at 24. This bug may be present in other BIOSes. The breakage functionally means the ACPI 3 flags are probably completely useless, and that no OS any time soon is going to rely on their existence. Therefore, drop support completely. We may want to revisit this question in the future, if we find ourselves actually needing the flags. This reverts all or part of the following checkins: cd670599b7b00d9263f6f11a05c0edeb9cbedaf3 c549e71d073a6e9a4847497344db28a784061455 However, retain the part from the latter commit that copies e820 into a temporary buffer; that is an unrelated BIOS workaround. Put in a comment to explain that part. See https://bugzilla.redhat.com/show_bug.cgi?id=499396 for some additional information. [ Impact: detect all memory on affected machines ] Reported-by: Thomas J. Baker <tjb@unh.edu> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Acked-by: Len Brown <len.brown@intel.com> Cc: Chuck Ebbert <cebbert@redhat.com> Cc: Kyle McMartin <kmcmartin@redhat.com> Cc: Matt Domsch <matt_domsch@dell.com>
| | * x86: DMI match for the Sony VGN-Z540N as it needs BIOS rebootZhang Rui2009-05-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | x86: DMI match for the Sony VGN-Z540N as it needs BIOS reboot, see: http://bugzilla.kernel.org/show_bug.cgi?id=12901 [ Impact: fix hung reboot on certain systems ] Signed-off-by: Zhang Rui <rui.zhang@intel.com> Cc: Len Brown <lenb@kernel.org> LKML-Reference: <1242963350.32574.53.camel@rzhang-dt> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds2009-05-22
| |\ \ | | | | | | | | | | | | | | | | | | | | | | | | * 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: MIPS: IP32: Remove unnecessary if not even harmful volatile keywords. MIPS: IP32: Fix build error due to uninitialized variable. MIPS: Fix sparse warning in incompatiable argument type of clear_user.
| | * | MIPS: IP32: Remove unnecessary if not even harmful volatile keywords.Ralf Baechle2009-05-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | They are unneeded and as the issue fixed in lmo commit 63f7ec59053e3f850ab67a9938e631bcba64c6ce shows even harmful. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | MIPS: IP32: Fix build error due to uninitialized variable.Ralf Baechle2009-05-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | CC arch/mips/sgi-ip32/ip32-reset.o cc1: warnings being treated as errors arch/mips/sgi-ip32/ip32-reset.c: In function 'debounce': arch/mips/sgi-ip32/ip32-reset.c:97: error: 'reg_a' is used uninitialized in this function The issues is old but due to the volatile keyword gcc older than 4.4 did not warn about this obvious bug. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| | * | MIPS: Fix sparse warning in incompatiable argument type of clear_user.Wu Zhangjin2009-05-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The type of the second argument of access_ok should be (void __user *). The unnecessary conversion of the clear_user address argument was causing sparse to emit warnings on the __chk_user_ptr check. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
| * | | Merge branch 'merge' of ↵Linus Torvalds2009-05-22
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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/maple: Add a quirk to disable MSI for IPR on Bimini
| | * | | powerpc/maple: Add a quirk to disable MSI for IPR on BiminiMichael Ellerman2009-05-22
| | |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Something in the HW or FW setup is busted and MSIs aren't working with IPR on Bimini, so until we figure out exaxtly what's up, we quirk them out Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * / / sh: ap325 camera without i2c driver fixMagnus Damm2009-05-22
| |/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the ap325rxa ncm03j camera code to handle the case where no i2c driver is present. Without this fix i2c_transfer() may be passed NULL as adapter which results in a crash. Triggered when i2c-sh_mobile.c failed to probe() due to missing MSTP clocks. Signed-off-by: Magnus Damm <damm@igel.co.jp> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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