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* kbuild: move utsrelease.h to include/generatedSam Ravnborg2009-12-1210-10/+10
| | | | | | | Fix up all users of utsrelease.h Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
* kbuild: move autoconf.h to include/generatedSam Ravnborg2009-12-121-1/+1
| | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
* drop explicit include of autoconf.hSam Ravnborg2009-12-124-4/+0Star
| | | | | | | | | kbuild.h forces include of autoconf.h on the commandline using -include - so we do not need to include the file explicit. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
* kbuild: move compile.h to include/generatedSam Ravnborg2009-12-121-1/+1
| | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
* kbuild: drop include2/ used for O=... buildsSam Ravnborg2009-12-121-4/+2Star
| | | | | | | | | | There is no longer any use of the include2/ directory. The generated files has moved to include/generated. Drop all references to said directory. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Michal Marek <mmarek@suse.cz>
* sh: move machtypes.h to include/generatedSam Ravnborg2009-12-126-13/+8Star
| | | | | | | Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Michal Marek <mmarek@suse.cz>
* arm: move mach-types to include/generatedSam Ravnborg2009-12-124-14/+5Star
| | | | | | | | | | Simplified arch/arm/Makefile by dropping the maketools target It was undocumented and not needed Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Russell King <linux@arm.linux.org.uk> Signed-off-by: Michal Marek <mmarek@suse.cz>
* ia64: move nr-irqs.h to include/generatedSam Ravnborg2009-12-123-7/+4Star
| | | | | | | | | | | Avoid generating files in the now deprecated asm-ia64 dir Simplified the logic in the Makefile when editing stuff in the area Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Michal Marek <mmarek@suse.cz>
* kbuild: move asm-offsets.h to include/generatedSam Ravnborg2009-12-1221-1/+21
| | | | | | | | | | | | | The simplest method was to add an extra asm-offsets.h file in arch/$ARCH/include/asm that references the generated file. We can now migrate the architectures one-by-one to reference the generated file direct - and when done we can delete the temporary arch/$ARCH/include/asm/asm-offsets.h file. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Michal Marek <mmarek@suse.cz>
* Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds2009-12-1218-168/+221
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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/amd-iommu: Fix PCI hotplug with passthrough mode x86/amd-iommu: Fix passthrough mode x86: mmio-mod.c: Use pr_fmt x86: kmmio.c: Add and use pr_fmt(fmt) x86: i8254.c: Add pr_fmt(fmt) x86: setup_percpu.c: Use pr_<level> and add pr_fmt(fmt) x86: es7000_32.c: Use pr_<level> and add pr_fmt(fmt) x86: Print DMI_BOARD_NAME as well as DMI_PRODUCT_NAME from __show_regs() x86: Factor duplicated code out of __show_regs() into show_regs_common() arch/x86/kernel/microcode*: Use pr_fmt() and remove duplicated KERN_ERR prefix x86, mce: fix confusion between bank attributes and mce attributes x86/mce: Set up timer unconditionally x86: Fix bogus warning in apic_noop.apic_write() x86: Fix typo in arch/x86/mm/kmmio.c x86: ASUS P4S800 reboot=bios quirk
| * Merge branch 'amd-iommu/fixes' of ↵Ingo Molnar2009-12-103-5/+54
| |\ | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/joro/linux-2.6-iommu into x86/urgent
| | * x86/amd-iommu: Fix PCI hotplug with passthrough modeJoerg Roedel2009-12-103-2/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | The device change notifier is initialized in the dma_ops initialization path. But this path is never executed for iommu=pt. Move the notifier initialization to IOMMU hardware init code to fix this. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| | * x86/amd-iommu: Fix passthrough modeJoerg Roedel2009-12-103-3/+46
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The data structure changes to use dev->archdata.iommu field broke the iommu=pt mode because in this case the dev->archdata.iommu was left uninitialized. This moves the inititalization of the devices into the main init function and fixes the problem. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
| * | x86: mmio-mod.c: Use pr_fmtJoe Perches2009-12-101-36/+35Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Add #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - Remove #define NAME - Remove NAME from pr_<level> Signed-off-by: Joe Perches <joe@perches.com> LKML-Reference: <009cb214c45ef932df0242856228f4739cc91408.1260383912.git.joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: kmmio.c: Add and use pr_fmt(fmt)Joe Perches2009-12-101-20/+20
| | | | | | | | | | | | | | | | | | | | | | | | | | | - Add #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - Strip "kmmio: " from pr_<level>s Signed-off-by: Joe Perches <joe@perches.com> LKML-Reference: <7aa509f8a23933036d39f54bd51e9acc52068049.1260383912.git.joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: i8254.c: Add pr_fmt(fmt)Joe Perches2009-12-101-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | - Add pr_fmt(fmt) "pit: " fmt - Strip pit: prefixes from pr_debug Signed-off-by: Joe Perches <joe@perches.com> LKML-Reference: <bbd4de532f18bb7c11f64ba20d224c08291cb126.1260383912.git.joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: setup_percpu.c: Use pr_<level> and add pr_fmt(fmt)Joe Perches2009-12-101-6/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | - Added #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - Stripped PERCPU: from a pr_warning Signed-off-by: Joe Perches <joe@perches.com> LKML-Reference: <7ead24eccbea8f2b11795abad3e2893a98e1e111.1260383912.git.joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: es7000_32.c: Use pr_<level> and add pr_fmt(fmt)Joe Perches2009-12-101-5/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Added #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - Converted a few printk(KERN_INFO to pr_info( - Stripped "es7000_mipcfg" from pr_debug Signed-off-by: Joe Perches <joe@perches.com> LKML-Reference: <3b4375af246dec5941168858910210937c110af9.1260383912.git.joe@perches.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: Print DMI_BOARD_NAME as well as DMI_PRODUCT_NAME from __show_regs()Andy Isaacson2009-12-091-4/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Robert Hancock observes that DMI_BOARD_NAME is often more useful than DMI_PRODUCT_NAME, especially on standalone motherboards. So, print both. Signed-off-by: Andy Isaacson <adi@hexapodia.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Robert Hancock <hancockrwd@gmail.com> Cc: Richard Zidlicky <rz@linux-m68k.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <20091208083021.GB27174@hexapodia.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: Factor duplicated code out of __show_regs() into show_regs_common()Andy Isaacson2009-12-094-27/+22Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Unify x86_32 and x86_64 implementations of __show_regs() header, standardizing on the x86_64 format string in the process. Also, 32-bit will now call print_modules. Signed-off-by: Andy Isaacson <adi@hexapodia.org> Cc: Arjan van de Ven <arjan@linux.intel.com> Cc: Robert Hancock <hancockrwd@gmail.com> Cc: Richard Zidlicky <rz@linux-m68k.org> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <20091208082942.GA27174@hexapodia.org> [ v2: resolved conflict ] Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | arch/x86/kernel/microcode*: Use pr_fmt() and remove duplicated KERN_ERR prefixJoe Perches2009-12-093-60/+53Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Use #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - Remove "microcode: " prefix from each pr_<level> - Fix duplicated KERN_ERR prefix - Coalesce pr_<level> format strings - Add a space after an exclamation point No other change in output. Signed-off-by: Joe Perches <joe@perches.com> Cc: Andy Whitcroft <apw@canonical.com> Cc: Andreas Herrmann <herrmann.der.user@googlemail.com> LKML-Reference: <1260340250.27677.191.camel@Joe-Laptop.home> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | Merge branch 'linus' into x86/urgentIngo Molnar2009-12-09910-10662/+46906
| |\ \ | | | | | | | | | | | | | | | | | | | | Merge reason: We want to queue up a dependent patch. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86, mce: fix confusion between bank attributes and mce attributesHidetoshi Seto2009-12-081-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit cebe182033f156b430952370fb0f9dbe6e89b081 had an unnecessary, wrong change: &mce_banks[i].attr is equivalent to the former bank_attrs[i], not to mce_attrs[i]. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Acked-by: Andi Kleen <andi@firstfloor.org> LKML-Reference: <4B1E05CC.4040703@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * | | x86/mce: Set up timer unconditionallyJan Beulich2009-12-081-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | mce_timer must be passed to setup_timer() in all cases, no matter whether it is going to be actually used. Otherwise, when the CPU gets brought down, its call to del_timer_sync() will never return, as the timer won't have a base associated, and hence lock_timer_base() will loop infinitely. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Cc: <stable@kernel.org> LKML-Reference: <4B1DB831.2030801@jp.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | x86: Fix bogus warning in apic_noop.apic_write()Thomas Gleixner2009-12-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | apic_noop is used to provide dummy apic functions. It's installed when the CPU has no APIC or when the APIC is disabled on the kernel command line. The apic_noop implementation of apic_write() warns when the CPU has an APIC or when the APIC is not disabled. That's bogus. The warning should only happen when the CPU has an APIC _AND_ the APIC is not disabled. apic_noop.apic_read() has the correct check. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Cyrill Gorcunov <gorcunov@openvz.org> Cc: <stable@kernel.org> # in <= .32 this typo resides in native_apic_write_dummy() LKML-Reference: <alpine.LFD.2.00.0912071255420.3089@localhost.localdomain> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | Merge branch 'linus' into x86/urgentIngo Molnar2009-12-07557-5964/+15943
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | Merge reason: we want to queue up a dependent fix. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | x86: Fix typo in arch/x86/mm/kmmio.cShaun Patterson2009-12-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Shaun Patterson <shaunpatterson@gmail.com> Cc: Jiri Kosina <jkosina@suse.cz> Cc: pq@iki.fi LKML-Reference: <1260027694.10074.170.camel@linux-4lgc.site> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | x86: ASUS P4S800 reboot=bios quirkLeann Ogasawara2009-12-051-0/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Bug reporter noted their system with an ASUS P4S800 motherboard would hang when rebooting unless reboot=b was specified. Their dmidecode didn't contain descriptive System Information for Manufacturer or Product Name, so I used their Base Board Information to create a reboot quirk patch. The bug reporter confirmed this patch resolves the reboot hang. Handle 0x0001, DMI type 1, 25 bytes System Information Manufacturer: System Manufacturer Product Name: System Name Version: System Version Serial Number: SYS-1234567890 UUID: E0BFCD8B-7948-D911-A953-E486B4EEB67F Wake-up Type: Power Switch Handle 0x0002, DMI type 2, 8 bytes Base Board Information Manufacturer: ASUSTeK Computer INC. Product Name: P4S800 Version: REV 1.xx Serial Number: xxxxxxxxxxx BugLink: http://bugs.launchpad.net/bugs/366682 ASUS P4S800 will hang when rebooting unless reboot=b is specified. Add a quirk to reboot through the bios. Signed-off-by: Leann Ogasawara <leann.ogasawara@canonical.com> LKML-Reference: <1259972107.4629.275.camel@emiko> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: <stable@kernel.org>
* | | | | Merge branch 'perf-fixes-for-linus' of ↵Linus Torvalds2009-12-128-57/+96
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: (57 commits) x86, perf events: Check if we have APIC enabled perf_event: Fix variable initialization in other codepaths perf kmem: Fix unused argument build warning perf symbols: perf_header__read_build_ids() offset'n'size should be u64 perf symbols: dsos__read_build_ids() should read both user and kernel buildids perf tools: Align long options which have no short forms perf kmem: Show usage if no option is specified sched: Mark sched_clock() as notrace perf sched: Add max delay time snapshot perf tools: Correct size given to memset perf_event: Fix perf_swevent_hrtimer() variable initialization perf sched: Fix for getting task's execution time tracing/kprobes: Fix field creation's bad error handling perf_event: Cleanup for cpu_clock_perf_event_update() perf_event: Allocate children's perf_event_ctxp at the right time perf_event: Clean up __perf_event_init_context() hw-breakpoints: Modify breakpoints without unregistering them perf probe: Update perf-probe document perf probe: Support --del option trace-kprobe: Support delete probe syntax ...
| * | | | | x86, perf events: Check if we have APIC enabledCyrill Gorcunov2009-12-101-6/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Ralf Hildebrandt reported this boot warning: | Running a vanilla 2.6.32 as Xen DomU, I'm getting: | | [ 0.000999] CPU: Physical Processor ID: 0 | [ 0.000999] CPU: Processor Core ID: 1 | [ 0.000999] Performance Events: AMD PMU driver. | [ 0.000999] ------------[ cut here ]------------ | [ 0.000999] WARNING: at arch/x86/kernel/apic/apic.c:249 native_apic_write_dummy So we need to check if APIC functionality is available, and not just in the P6 driver but elsewhere as well. Reported-by: Ralf Hildebrandt <Ralf.Hildebrandt@charite.de> Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org> 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: <20091210165634.GF5086@lenovo> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | perf_event: Fix variable initialization in other codepathsXiao Guangrong2009-12-101-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> LKML-Reference: <4B20BAA6.7010609@cn.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | hw-breakpoints: Modify breakpoints without unregistering themFrederic Weisbecker2009-12-091-31/+26Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, when ptrace needs to modify a breakpoint, like disabling it, changing its address, type or len, it calls modify_user_hw_breakpoint(). This latter will perform the heavy and racy task of unregistering the old breakpoint and registering a new one. This is racy as someone else might steal the reserved breakpoint slot under us, which is undesired as the breakpoint is only supposed to be modified, sometimes in the middle of a debugging workflow. We don't want our slot to be stolen in the middle. So instead of unregistering/registering the breakpoint, just disable it while we modify its breakpoint fields and re-enable it after if necessary. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Prasad <prasad@linux.vnet.ibm.com> LKML-Reference: <1260347148-5519-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86 insn: Delete empty or incomplete inat-tables.cMasami Hiramatsu2009-12-071-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Delete empty or incomplete inat-tables.c if gen-insn-attr-x86.awk failed, because it causes a build error if user tries to build kernel next time. Reported-by: Arkadiusz Miskiewicz <arekm@maven.pl> Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: systemtap <systemtap@sources.redhat.com> Cc: DLE <dle-develop@lists.sourceforge.net> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <20091207170033.19230.37688.stgit@dhcp-100-2-132.bos.redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86: Compile insn.c and inat.c only for KPROBESOGAWA Hirofumi2009-12-072-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | At least, insn.c and inat.c is needed for kprobe for now. So, this compile those only if KPROBES is enabled. Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> Cc: Masami Hiramatsu <mhiramat@redhat.com> LKML-Reference: <878wdg8icq.fsf@devron.myhome.or.jp> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86, perf probe: Fix warning in test_get_len()Jean Delvare2009-12-061-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the following warning: arch/x86/tools/test_get_len.c: In function "main": arch/x86/tools/test_get_len.c:116: warning: unused variable "c" Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Masami Hiramatsu <mhiramat@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | | | | x86: Fixup wrong irq frame link in stacktracesFrederic Weisbecker2009-12-061-1/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we enter in irq, two things can happen to preserve the link to the previous frame pointer: - If we were in an irq already, we don't switch to the irq stack as we are inside. We just need to save the previous frame pointer and to link the new one to the previous. - Otherwise we need another level of indirection. We enter the irq with the previous stack. We save the previous bp inside and make bp pointing to its saved address. Then we switch to the irq stack and push bp another time but to the new stack. This makes two levels to dereference instead of one. In the second case, the current stacktrace code omits the second level and loses the frame pointer accuracy. The stack that follows will then be considered as unreliable. Handling that makes the perf callchain happier. Before: 43.94% [k] _raw_read_lock | --- _read_lock | |--60.53%-- send_sigio | __kill_fasync | kill_fasync | evdev_pass_event | evdev_event | input_pass_event | input_handle_event | input_event | synaptics_process_byte | psmouse_handle_byte | psmouse_interrupt | serio_interrupt | i8042_interrupt | handle_IRQ_event | handle_edge_irq | handle_irq | __irqentry_text_start | ret_from_intr | | | |--30.43%-- __select | | | |--17.39%-- 0x454f15 | | | |--13.04%-- __read | | | |--13.04%-- vread_hpet | | | |--13.04%-- _xcb_lock_io | | | --13.04%-- 0x7f630878ce8 After: 50.00% [k] _raw_read_lock | --- _read_lock | |--98.97%-- send_sigio | __kill_fasync | kill_fasync | evdev_pass_event | evdev_event | input_pass_event | input_handle_event | input_event | | | |--96.88%-- synaptics_process_byte | | psmouse_handle_byte | | psmouse_interrupt | | serio_interrupt | | i8042_interrupt | | handle_IRQ_event | | handle_edge_irq | | handle_irq | | __irqentry_text_start | | ret_from_intr | | | | | |--39.78%-- __const_udelay | | | | | | | |--91.89%-- ath5k_hw_register_timeout | | | | ath5k_hw_noise_floor_calibration | | | | ath5k_hw_reset | | | | ath5k_reset | | | | ath5k_config | | | | ieee80211_hw_config | | | | | | | | | |--88.24%-- ieee80211_scan_work | | | | | worker_thread | | | | | kthread | | | | | child_rip | | | | | | | | | --11.76%-- ieee80211_scan_completed | | | | ieee80211_scan_work | | | | worker_thread | | | | kthread | | | | child_rip | | | | | | | --8.11%-- ath5k_hw_noise_floor_calibration | | | ath5k_hw_reset | | | ath5k_reset | | | ath5k_config Note: This does not only affect perf events but also x86-64 stacktraces. They were considered as unreliable once we quit the irq stack frame. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: "K. Prasad" <prasad@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com>
| * | | | | x86: Fixup wrong debug exception frame link in stacktracesFrederic Weisbecker2009-12-061-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While dumping a stacktrace, the end of the exception stack won't link the frame pointer to the previous stack. The interrupted stack will then be considered as unreliable and ignored by perf, as the frame pointer is unreliable itself. This happens because we overwrite the frame pointer that links to the interrupted frame with the address of the exception stack. This is done in order to reserve space inside. But rbp has been chosen here only because it is not a scratch register, so that the address of the exception stack remains in rbp after calling do_debug(), we can then release the exception stack space without the need to retrieve its address again. But we can pick another non-scratch register to do that, so that we preserve the link to the interrupted stack frame in the stacktraces. Just randomly choose r12. Every registers are saved just before and restored just after calling do_debug(). And r12 is not used in the middle, which makes it a perfect candidate. Example: perf record -g -a -c 1 -f -e mem:$(tasklist_lock_addr):rw Before: 44.18% [k] _raw_read_lock | | --- |--6.31%-- waitid | |--4.26%-- writev | |--3.63%-- __select | |--3.15%-- __waitpid | | | |--28.57%-- 0x8b52e00000139f | | | |--28.57%-- 0x8b52e0000013c6 | | | |--14.29%-- 0x7fde786dc000 | | | |--14.29%-- 0x62696c2f7273752f | | | --14.29%-- 0x1ea9df800000000 | |--3.00%-- __poll After: 43.94% [k] _raw_read_lock | --- _read_lock | |--60.53%-- send_sigio | __kill_fasync | kill_fasync | evdev_pass_event | evdev_event | input_pass_event | input_handle_event | input_event | synaptics_process_byte | psmouse_handle_byte | psmouse_interrupt | serio_interrupt | i8042_interrupt | handle_IRQ_event | handle_edge_irq | handle_irq | __irqentry_text_start | ret_from_intr | | | |--30.43%-- __select | | | |--17.39%-- 0x454f15 | | | |--13.04%-- __read | | | |--13.04%-- vread_hpet | | | |--13.04%-- _xcb_lock_io | | | --13.04%-- 0x7f630878ce87 Note: it does not only affect perf events but also other stacktraces in x86-64. They were considered as unreliable once we quit the debug stack frame. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: "K. Prasad" <prasad@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com>
| * | | | | x86/perf: Exclude the debug stack from the callchainsFrederic Weisbecker2009-12-061-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Dumping the callchains from breakpoint events with perf gives strange results: 3.75% perf [kernel] [k] _raw_read_unlock | --- _raw_read_unlock perf_callchain perf_prepare_sample __perf_event_overflow perf_swevent_overflow perf_swevent_add perf_bp_event hw_breakpoint_exceptions_notify notifier_call_chain __atomic_notifier_call_chain atomic_notifier_call_chain notify_die do_debug debug munmap We are infected with all the debug stack. Like the nmi stack, the debug stack is undesired as it is part of the profiling path, not helpful for the user. Ignore it. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: "K. Prasad" <prasad@linux.vnet.ibm.com>
| * | | | | hw-breakpoints: Use overflow handler instead of the event callbackFrederic Weisbecker2009-12-062-6/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct perf_event::event callback was called when a breakpoint triggers. But this is a rather opaque callback, pretty tied-only to the breakpoint API and not really integrated into perf as it triggers even when we don't overflow. We prefer to use overflow_handler() as it fits into the perf events rules, being called only when we overflow. Reported-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: "K. Prasad" <prasad@linux.vnet.ibm.com>
| * | | | | hw-breakpoints: Drop callback and task parameters from modify helperFrederic Weisbecker2009-12-061-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Drop the callback and task parameters from modify_user_hw_breakpoint(). For now we have no user that need to modify a breakpoint to the point of changing its handler or its task context. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: "K. Prasad" <prasad@linux.vnet.ibm.com>
* | | | | | Merge branch 'for-linus' of git://codeaurora.org/quic/kernel/dwalker/linux-msmLinus Torvalds2009-12-129-7/+194
|\ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://codeaurora.org/quic/kernel/dwalker/linux-msm: HTC Dream: mmc compilation fixes video: Allow selecting MSM framebuffer in Kconfig Add arm msm maintainer entry msm: Add memory map for HTC Dream msm: add minimal board file for HTC Dream device msm: make debugging UART (for DEBUG_LL) configurable
| * | | | | | HTC Dream: mmc compilation fixesPavel Machek2009-12-101-0/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add missing include for msm_sdcc compilation, and remove pwrsink support that is not mainline, yet. Signed-off-by: Pavel Machek <pavel@ucw.cz> [dwalker@codeaurora.org : fixed indent in mmc.h] Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
| * | | | | | msm: Add memory map for HTC DreamPavel Machek2009-11-201-0/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add memory map to HTC Dream, so that boot can proceed further. Signed-off-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
| * | | | | | msm: add minimal board file for HTC Dream devicePavel Machek2009-11-204-0/+94
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is just enough to get the device booting and serial console working. Sufficient for debugging further MSM7k/Dream Support. This will support HTC Dream / T-Mobile G1 / Android ADP1 (which are all the same hardware, known as "trout" to the ARM machine database). Signed-off-by: Brian Swetland <swetland@google.com> Reviewed-by: GeunSik Lim <geunsik.lim@samsung.com> Signed-off-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
| * | | | | | msm: make debugging UART (for DEBUG_LL) configurablePavel Machek2009-11-205-7/+63
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provides options to select one of the three "lowspeed" UARTs on MSM7k SoCs for DEBUG_LL output from the zImage decompressor and kernel. Signed-off-by: Brian Swetland <swetland@google.com> Signed-off-by: Pavel Machek <pavel@ucw.cz> Signed-off-by: Daniel Walker <dwalker@codeaurora.org>
* | | | | | | Merge branch 'next' of ↵Linus Torvalds2009-12-128-47/+57
|\ \ \ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq * 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq: [ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interface [CPUFREQ] make internal cpufreq_add_dev_* static [CPUFREQ] use an enum for speedstep processor identification [CPUFREQ] Document units for transition latency [CPUFREQ] Use global sysfs cpufreq structure for conservative governor tunings [CPUFREQ] Documentation: ABI: /sys/devices/system/cpu/cpu#/cpufreq/ [CPUFREQ] powernow-k6: set transition latency value so ondemand governor can be used [CPUFREQ] cpumask: don't put a cpumask on the stack in x86...cpufreq/powernow-k8.c
| * | | | | | | [ACPI/CPUFREQ] Introduce bios_limit per cpu cpufreq sysfs interfaceThomas Renninger2009-11-243-24/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This interface is mainly intended (and implemented) for ACPI _PPC BIOS frequency limitations, but other cpufreq drivers can also use it for similar use-cases. Why is this needed: Currently it's not obvious why cpufreq got limited. People see cpufreq/scaling_max_freq reduced, but this could have happened by: - any userspace prog writing to scaling_max_freq - thermal limitations - hardware (_PPC in ACPI case) limitiations Therefore export bios_limit (in kHz) to: - Point the user that it's the BIOS (broken or intended) which limits frequency - Export it as a sysfs interface for userspace progs. While this was a rarely used feature on laptops, there will appear more and more server implemenations providing "Green IT" features like allowing the service processor to limit the frequency. People want to know about HW/BIOS frequency limitations. All ACPI P-state driven cpufreq drivers are covered with this patch: - powernow-k8 - powernow-k7 - acpi-cpufreq Tested with a patched DSDT which limits the first two cores (_PPC returns 1) via _PPC, exposed by bios_limit: # echo 2200000 >cpu2/cpufreq/scaling_max_freq # cat cpu*/cpufreq/scaling_max_freq 2600000 2600000 2200000 2200000 # #scaling_max_freq shows general user/thermal/BIOS limitations # cat cpu*/cpufreq/bios_limit 2600000 2600000 2800000 2800000 # #bios_limit only shows the HW/BIOS limitation CC: Pallipadi Venkatesh <venkatesh.pallipadi@intel.com> CC: Len Brown <lenb@kernel.org> CC: davej@codemonkey.org.uk CC: linux@dominikbrodowski.net Signed-off-by: Thomas Renninger <trenn@suse.de> Signed-off-by: Dave Jones <davej@redhat.com>
| * | | | | | | [CPUFREQ] use an enum for speedstep processor identificationRusty Russell2009-11-244-17/+17
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The "unsigned int processor" everywhere confused Rusty, leading to breakage when he passed in smp_processor_id(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Dominik Brodowski <linux@dominikbrodowski.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Dave Jones <davej@redhat.com>
| * | | | | | | [CPUFREQ] powernow-k6: set transition latency value so ondemand governor can ↵Krzysztof Helt2009-11-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | be used Set the transition latency to value smaller than CPUFREQ_ETERNAL so governors other than "performance" work (like the "ondemand" one). The value is found in "AMD PowerNow! Technology Platform Design Guide for Embedded Processors" dated December 2000 (AMD doc #24267A). There is the answer to one of FAQs on page 40 which states that suggested complete transition period is 200 us. Tested on K6-2+ CPU with K6-3 core (model 13, stepping 4). Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Dave Jones <davej@redhat.com>
| * | | | | | | [CPUFREQ] cpumask: don't put a cpumask on the stack in ↵Rusty Russell2009-11-241-5/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | x86...cpufreq/powernow-k8.c It's still mugging the current process's cpumask, but as comment in 1ff6e97f1d says, it's not a trivial fix. So, at least we can use a cpumask_var_t to do the Wrong Thing the Right Way :) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> To: cpufreq@vger.kernel.org Cc: Mark Langsdorf <mark.langsdorf@amd.com> Signed-off-by: Dave Jones <davej@redhat.com>
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-03 13:28:10 +0200