- 26 2月, 2010 1 次提交
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由 Pan, Jacob jun 提交于
The NUMAQ initialization sets x86_init.pci.init to pci_numaq_init, which obviously isn't defined if CONFIG_PCI isn't defined. This dependency was implicit in the past, because pci_numaq_init was invoked from arch/x86/pci/legacy.c, which itself was conditioned on CONFIG_PCI. I suspect that no NUMA-Q machines without PCI were ever built, so instead of complicating the code by adding #ifdefs or stub functions, just disable this bit of the configuration space. [ hpa: rewrote the checkin comment ] Signed-off-by: NJacob Pan <jacob.jun.pan@intel.com> LKML-Reference: <43F901BD926A4E43B106BF17856F0755A321EE1F@orsmsx508.amr.corp.intel.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 25 2月, 2010 1 次提交
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由 Jacob Pan 提交于
Moorestown platform does not have PIT or HPET platform timers. Instead it has a bank of eight APB timers. The number of available timers to the os is exposed via SFI mtmr tables. All APB timer interrupts are routed via ioapic rtes and delivered as MSI. Currently, we use timer 0 and 1 for per cpu clockevent devices, timer 2 for clocksource. Signed-off-by: NJacob Pan <jacob.jun.pan@intel.com> LKML-Reference: <43F901BD926A4E43B106BF17856F0755A318D2D2@orsmsx508.amr.corp.intel.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 24 1月, 2010 1 次提交
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由 H. Peter Anvin 提交于
CONFIG_X86_CPU_DEBUG, which provides some parsed versions of the x86 CPU configuration via debugfs, has caused boot failures on real hardware. The value of this feature has been marginal at best, as all this information is already available to userspace via generic interfaces. Causes crashes that have not been fixed + minimal utility -> remove. See the referenced LKML thread for more information. Reported-by: NOzan Çağlayan <ozan@pardus.org.tr> Signed-off-by: NH. Peter Anvin <hpa@zytor.com> LKML-Reference: <alpine.LFD.2.00.1001221755320.13231@localhost.localdomain> Cc: Jaswinder Singh Rajput <jaswinder@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Rafael J. Wysocki <rjw@sisk.pl> Cc: Yinghai Lu <yinghai@kernel.org> Cc: <stable@kernel.org>
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- 12 1月, 2010 2 次提交
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由 Avi Kivity 提交于
The list macros use LIST_POISON1 and LIST_POISON2 as undereferencable pointers in order to trap erronous use of freed list_heads. Unfortunately userspace can arrange for those pointers to actually be dereferencable, potentially turning an oops to an expolit. To avoid this allow architectures (currently x86_64 only) to override the default values for these pointers with truly-undereferencable values. This is easy on x86_64 as the virtual address space is large and contains areas that cannot be mapped. Other 64-bit architectures will likely find similar unmapped ranges. [ingo: switch to 0xdead000000000000 as the unmapped area] [ingo: add comments, cleanup] [jaswinder: eliminate sparse warnings] Acked-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu> Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Albin Tonnerre 提交于
The necessary changes to the x86 Kconfig and boot/compressed to allow the use of this new compression method Signed-off-by: NAlbin Tonnerre <albin.tonnerre@free-electrons.com> Acked-by: NH. Peter Anvin <hpa@zytor.com> Tested-by: NWu Zhangjin <wuzhangjin@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Tested-by: NRussell King <rmk@arm.linux.org.uk> Acked-by: NRussell King <rmk@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 18 12月, 2009 1 次提交
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由 Frederic Weisbecker 提交于
The kbuild's select command doesn't propagate through the config dependencies. Hence the current rules of hardware breakpoint's config can't ensure perf can never be disabled under us. We have: config X86 selects HAVE_HW_BREAKPOINTS config HAVE_HW_BREAKPOINTS select PERF_EVENTS config PERF_EVENTS [...] x86 will select the breakpoints but that won't propagate to perf events. The user can still disable the latter, but it is necessary for the breakpoints. What we need is: - x86 selects HAVE_HW_BREAKPOINTS and PERF_EVENTS - HAVE_HW_BREAKPOINTS depends on PERF_EVENTS so that we ensure PERF_EVENTS is enabled and frozen for x86. This fixes the following kind of build errors: In file included from arch/x86/kernel/hw_breakpoint.c:31: include/linux/hw_breakpoint.h: In function 'hw_breakpoint_addr': include/linux/hw_breakpoint.h:39: error: 'struct perf_event' has no member named 'attr' v2: Select also ANON_INODES from x86, required for perf Reported-by: NCyrill Gorcunov <gorcunov@gmail.com> Reported-by: NMichal Marek <mmarek@suse.cz> Reported-by: NAndrew Randrianasulu <randrik_a@yahoo.com> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: K.Prasad <prasad@linux.vnet.ibm.com> LKML-Reference: <1261010034-7786-1-git-send-regression-fweisbec@gmail.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 16 12月, 2009 2 次提交
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由 Andres Salomon 提交于
With generic modular drivers handling all of this stuff, the geode-specific code can go away. The cs5535-gpio, cs5535-mfgpt, and cs5535-clockevt drivers now handle this. Signed-off-by: NAndres Salomon <dilinger@collabora.co.uk> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Chris Ball <cjb@laptop.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Andres Salomon 提交于
Previously, OLPC support for the mic extensions was only enabled in the ALSA driver if CONFIG_OLPC and CONFIG_MGEODE_LX were both set. This was because the old geode GPIO code was written in a manner that assumed CONFIG_MGEODE_LX. With the new cs553x-gpio driver, this is no longer the case; as such, we can drop the requirement on CONFIG_MGEODE_LX and instead include a requirement on GPIOLIB. We use the generic GPIO API rather than the cs553x-specific API. Signed-off-by: NAndres Salomon <dilinger@collabora.co.uk> Cc: Takashi Iwai <tiwai@suse.de> Cc: Jordan Crouse <jordan@cosmicpenguin.net> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 11 11月, 2009 1 次提交
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由 Randy Dunlap 提交于
COMPAT_VDSO has 2 help text blocks, but kconfig only uses the last one found, so merge the 2 blocks. It would be real nice if kconfig would warn about this. Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com> LKML-Reference: <4AF9FB6C.70003@oracle.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 23 10月, 2009 1 次提交
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由 Arjan van de Ven 提交于
STACKPROTECTOR_ALL has a really high overhead (runtime and stack footprint) and is not really worth it protection wise (the normal STACKPROTECTOR is in effect for all functions with buffers already), so lets just remove the option entirely. Reported-by: NDave Jones <davej@redhat.com> Reported-by: NChuck Ebbert <cebbert@redhat.com> Signed-off-by: NArjan van de Ven <arjan@linux.intel.com> Cc: Eric Sandeen <sandeen@redhat.com> LKML-Reference: <20091023073101.3dce4ebb@infradead.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 12 10月, 2009 1 次提交
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由 Arjan van de Ven 提交于
MTRR and PAT support (which got added to CPUs over 10 years ago) are no longer really optional in that more and more things are depending on PAT just working, including various drivers and newer versions of X. (to not even speak of MTRR) Having this as a regular config option just no longer makes sense. This patch relegates CONFIG_X86_PAT to the EMBEDDED category so ultra-embedded can still disable it if they really need to. Also-Suggested-by: NRoland Dreier <rdreier@cisco.com> Signed-off-by: NArjan van de Ven <arjan@linux.intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br> LKML-Reference: <20091011103302.62bded41@infradead.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 09 10月, 2009 1 次提交
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由 Alok Kataria 提交于
Add text in feature-removal.txt indicating that VMI will be removed in the 2.6.37 timeframe. Signed-off-by: NAlok N Kataria <akataria@vmware.com> Acked-by: NChris Wright <chrisw@sous-sol.org> LKML-Reference: <1254193238.13456.48.camel@ank32.eng.vmware.com> [ removed a bogus Kconfig change, marked (DEPRECATED) in Kconfig ] Signed-off-by: NH. Peter Anvin <hpa@zytor.com> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 02 10月, 2009 1 次提交
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由 Avi Kivity 提交于
Add a general per-cpu notifier that is called whenever the kernel is about to return to userspace. The notifier uses a thread_info flag and existing checks, so there is no impact on user return or context switch fast paths. This will be used initially to speed up KVM task switching by lazily updating MSRs. Signed-off-by: NAvi Kivity <avi@redhat.com> LKML-Reference: <1253342422-13811-1-git-send-email-avi@redhat.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 01 10月, 2009 1 次提交
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由 Jaswinder Singh Rajput 提交于
Remove unused CONFIG FAST_CMPXCHG_LOCAL from Kconfig. Reported-by: NRobert P. J. Day <rpjday@crashcourse.ca> Signed-off-by: NJaswinder Singh Rajput <jaswinderrajput@gmail.com> Acked-by: NChristoph Lameter <cl@linux-foundation.org> Cc: Pekka Enberg <penberg@cs.helsinki.fi> Cc: Matt Mackall <mpm@selenic.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: "Robert P. J. Day" <rpjday@crashcourse.ca> Cc: linux-mm@kvack.org LKML-Reference: <1253981501.4568.61.camel@ht.satnam> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 27 9月, 2009 1 次提交
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由 Linus Torvalds 提交于
This build failure triggers: In file included from include/linux/suspend.h:8, from arch/x86/kernel/asm-offsets_32.c:11, from arch/x86/kernel/asm-offsets.c:2: include/linux/mm.h:503:2: error: #error SECTIONS_WIDTH+NODES_WIDTH+ZONES_WIDTH > BITS_PER_LONG - NR_PAGEFLAGS Because due to the hwpoison page flag we ran out of page flags on 32-bit. Dont turn on hwpoison on 32-bit NUMA (it's rare in any case). Also clean up the Kconfig dependencies in the generic MM code by introducing ARCH_SUPPORTS_MEMORY_FAILURE. Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 23 9月, 2009 1 次提交
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由 KAMEZAWA Hiroyuki 提交于
Some 64bit arch has special segment for mapping kernel text. It should be entried to /proc/kcore in addtion to direct-linear-map, vmalloc area. This patch unifies KCORE_TEXT entry scattered under x86 and ia64. I'm not familiar with other archs (mips has its own even after this patch) but range of [_stext ..._end) is a valid area of text and it's not in direct-map area, defining CONFIG_ARCH_PROC_KCORE_TEXT is only a necessary thing to do. Note: I left mips as it is now. Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 21 9月, 2009 1 次提交
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由 Ingo Molnar 提交于
Bye-bye Performance Counters, welcome Performance Events! In the past few months the perfcounters subsystem has grown out its initial role of counting hardware events, and has become (and is becoming) a much broader generic event enumeration, reporting, logging, monitoring, analysis facility. Naming its core object 'perf_counter' and naming the subsystem 'perfcounters' has become more and more of a misnomer. With pending code like hw-breakpoints support the 'counter' name is less and less appropriate. All in one, we've decided to rename the subsystem to 'performance events' and to propagate this rename through all fields, variables and API names. (in an ABI compatible fashion) The word 'event' is also a bit shorter than 'counter' - which makes it slightly more convenient to write/handle as well. Thanks goes to Stephane Eranian who first observed this misnomer and suggested a rename. User-space tooling and ABI compatibility is not affected - this patch should be function-invariant. (Also, defconfigs were not touched to keep the size down.) This patch has been generated via the following script: FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/PERF_EVENT_/PERF_RECORD_/g' \ -e 's/PERF_COUNTER/PERF_EVENT/g' \ -e 's/perf_counter/perf_event/g' \ -e 's/nb_counters/nb_events/g' \ -e 's/swcounter/swevent/g' \ -e 's/tpcounter_event/tp_event/g' \ $FILES for N in $(find . -name perf_counter.[ch]); do M=$(echo $N | sed 's/perf_counter/perf_event/g') mv $N $M done FILES=$(find . -name perf_event.*) sed -i \ -e 's/COUNTER_MASK/REG_MASK/g' \ -e 's/COUNTER/EVENT/g' \ -e 's/\<event\>/event_id/g' \ -e 's/counter/event/g' \ -e 's/Counter/Event/g' \ $FILES ... to keep it as correct as possible. This script can also be used by anyone who has pending perfcounters patches - it converts a Linux kernel tree over to the new naming. We tried to time this change to the point in time where the amount of pending patches is the smallest: the end of the merge window. Namespace clashes were fixed up in a preparatory patch - and some stylistic fallout will be fixed up in a subsequent patch. ( NOTE: 'counters' are still the proper terminology when we deal with hardware registers - and these sed scripts are a bit over-eager in renaming them. I've undone some of that, but in case there's something left where 'counter' would be better than 'event' we can undo that on an individual basis instead of touching an otherwise nicely automated patch. ) Suggested-by: NStephane Eranian <eranian@google.com> Acked-by: NPeter Zijlstra <a.p.zijlstra@chello.nl> Acked-by: NPaul Mackerras <paulus@samba.org> Reviewed-by: NArjan van de Ven <arjan@linux.intel.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: David Howells <dhowells@redhat.com> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: <linux-arch@vger.kernel.org> LKML-Reference: <new-submission> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 20 9月, 2009 1 次提交
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由 David Woodhouse 提交于
Just make it depend on BROKEN for now, in case people scream really loud about it (and because we might want to keep some of this logic for an upcoming BIOS workaround, so I don't just want to rip it out entirely just yet). But for graphics devices, it really ought to be unnecessary. Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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- 03 9月, 2009 1 次提交
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由 Pavel Vasilyev 提交于
There is no dependency from the gart code to the agp code. And since a lot of systems today do not have agp anymore remove this dependency from the kernel configuration. Signed-off-by: NPavel Vasilyev <pavel@pavlinux.ru> Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
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- 02 9月, 2009 1 次提交
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由 Shane Wang 提交于
Move tboot.h from asm to linux to fix the build errors of intel_txt patch on non-X86 platforms. Remove the tboot code from generic code init/main.c and kernel/cpu.c. Signed-off-by: NShane Wang <shane.wang@intel.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 31 8月, 2009 1 次提交
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由 Thomas Gleixner 提交于
Moorestown MID devices need to be detected early in the boot process to setup and do not call x86_default_early_setup as there is no EBDA region to reserve. [ Copied the minimal code from Jacobs latest MRST series ] Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Cc: Jacob Pan <jacob.jun.pan@intel.com>
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- 29 8月, 2009 2 次提交
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由 Feng Tang 提交于
First check ACPI, and if that fails, ask SFI to find the MCFG. Signed-off-by: NFeng Tang <feng.tang@intel.com> Signed-off-by: NLen Brown <len.brown@intel.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
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由 Feng Tang 提交于
arch/x86/kernel/sfi.c serves the dual-purpose of supporting the SFI core with arch specific code, as well as a home for the arch-specific code that uses SFI. analogous to ACPI, drivers/sfi/Kconfig is pulled in by arch/x86/Kconfig Signed-off-by: NFeng Tang <feng.tang@intel.com> Signed-off-by: NLen Brown <len.brown@intel.com> Cc: x86@kernel.org
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- 27 8月, 2009 1 次提交
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由 Venkatesh Pallipadi 提交于
Only IA64 was using PG_uncached as of now. We now intend to use this bit in x86 as well, to keep track of memory type of those addresses that have page struct for them. So, generalize the use of that bit across ia64 and x86. Signed-off-by: NVenkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: NSuresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 26 8月, 2009 1 次提交
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由 Josh Stone 提交于
s/HAVE_FTRACE_SYSCALLS/HAVE_SYSCALL_TRACEPOINTS/g s/TIF_SYSCALL_FTRACE/TIF_SYSCALL_TRACEPOINT/g The syscall enter/exit tracing is no longer specific to just ftrace, so they now have names that reflect their tie to tracepoints instead. Signed-off-by: NJosh Stone <jistone@redhat.com> Cc: Jason Baron <jbaron@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: Jiaying Zhang <jiayingz@google.com> Cc: Martin Bligh <mbligh@google.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> LKML-Reference: <1251150194-1713-2-git-send-email-jistone@redhat.com> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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- 14 8月, 2009 2 次提交
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由 Tejun Heo 提交于
Embedding percpu first chunk allocator can now handle very sparse unit mapping. Use embedding allocator instead of lpage for 64bit NUMA. This removes extra TLB pressure and the need to do complex and fragile dancing when changing page attributes. For 32bit, using very sparse unit mapping isn't a good idea because the vmalloc space is very constrained. 32bit NUMA machines aren't exactly the focus of optimization and it isn't very clear whether lpage performs better than page. Use page first chunk allocator for 32bit NUMAs. As this leaves setup_pcpu_*() functions pretty much empty, fold them into setup_per_cpu_areas(). Signed-off-by: NTejun Heo <tj@kernel.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Andi Kleen <andi@firstfloor.org>
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由 Tejun Heo 提交于
There's no need to build unused first chunk allocators in. Define CONFIG_NEED_PER_CPU_*_FIRST_CHUNK and let archs enable them selectively. Signed-off-by: NTejun Heo <tj@kernel.org>
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- 12 8月, 2009 1 次提交
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由 Ingo Molnar 提交于
Johannes Stezenbach reported that his Pentium-M based laptop does not have the local APIC enabled by default, and hence perfcounters do not get initialized. Add a fallback for this case: allow non-sampled counters and return with an error on sampled counters. This allows 'perf stat' to work out of box - and allows 'perf top' and 'perf record' to fall back on a hrtimer based sampling method. ( Passing 'lapic' on the boot line will allow hardware sampling to occur - but if the APIC is disabled permanently by the hardware then this fallback still allows more systems to use perfcounters. ) Also decouple perfcounter support from X86_LOCAL_APIC. -v2: fix typo breaking counters on all other systems ... Reported-by: NJohannes Stezenbach <js@sig21.net> 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: <new-submission> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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- 10 7月, 2009 4 次提交
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由 Andi Kleen 提交于
Drop the CONFIG_X86_NEW_MCE symbol and change all references to it to check for CONFIG_X86_MCE directly. No code changes Signed-off-by: NAndi Kleen <ak@linux.intel.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 Andi Kleen 提交于
As announced in feature-remove-schedule.txt remove CONFIG_X86_OLD_MCE This patch only removes code. The ancient machine check code for very old systems that are not supported by CONFIG_X86_NEW_MCE is still kept. Signed-off-by: NAndi Kleen <ak@linux.intel.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 Andi Kleen 提交于
- Clarify that this config controls thermal throttling reporting too - Clarify the types of errors reported by machine checks - Drop references to ancient CPUs. Signed-off-by: NAndi Kleen <ak@linux.intel.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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由 Andi Kleen 提交于
Add a missing depency for ANCIENT_MCE. It didn't matter in practice because the ANCIENT code wasn't compiled without X86_MCE, but it's better to express that clearly in Kconfig. Signed-off-by: NAndi Kleen <ak@linux.intel.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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- 04 7月, 2009 1 次提交
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由 David Woodhouse 提交于
We need to give people a little more time to fix the broken drivers. Re-introduce this, but tied in properly with the 'iommu=pt' support this time. Change the config option name and make it default to 'no' too. Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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- 29 6月, 2009 1 次提交
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由 David Woodhouse 提交于
There's no need for the GFX workaround now we have 'iommu=pt' for the cases where people really care about performance. There's no need to have a special case for just one type of device. This also speeds up the iommu=pt path and reduces memory usage by setting up the si_domain _once_ and then using it for all devices, rather than giving each device its own private page tables. Signed-off-by: NDavid Woodhouse <David.Woodhouse@intel.com>
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- 24 6月, 2009 1 次提交
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由 Tejun Heo 提交于
This patch makes most !CONFIG_HAVE_SETUP_PER_CPU_AREA archs use dynamic percpu allocator. The first chunk is allocated using embedding helper and 8k is reserved for modules. This ensures that the new allocator behaves almost identically to the original allocator as long as static percpu variables are concerned, so it shouldn't introduce much breakage. s390 and alpha use custom SHIFT_PERCPU_PTR() to work around addressing range limit the addressing model imposes. Unfortunately, this breaks if the address is specified using a variable, so for now, the two archs aren't converted. The following architectures are affected by this change. * sh * arm * cris * mips * sparc(32) * blackfin * avr32 * parisc (broken, under investigation) * m32r * powerpc(32) As this change makes the dynamic allocator the default one, CONFIG_HAVE_DYNAMIC_PER_CPU_AREA is replaced with its invert - CONFIG_HAVE_LEGACY_PER_CPU_AREA, which is added to yet-to-be converted archs. These archs implement their own setup_per_cpu_areas() and the conversion is not trivial. * powerpc(64) * sparc(64) * ia64 * alpha * s390 Boot and batch alloc/free tests on x86_32 with debug code (x86_32 doesn't use default first chunk initialization). Compile tested on sparc(32), powerpc(32), arm and alpha. Kyle McMartin reported that this change breaks parisc. The problem is still under investigation and he is okay with pushing this patch forward and fixing parisc later. [ Impact: use dynamic allocator for most archs w/o custom percpu setup ] Signed-off-by: NTejun Heo <tj@kernel.org> Acked-by: NRusty Russell <rusty@rustcorp.com.au> Acked-by: NDavid S. Miller <davem@davemloft.net> Acked-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> Acked-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Reviewed-by: NChristoph Lameter <cl@linux.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Mikael Starvik <starvik@axis.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Bryan Wu <cooloney@kernel.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Matthew Wilcox <matthew@wil.cx> Cc: Grant Grundler <grundler@parisc-linux.org> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ingo Molnar <mingo@elte.hu>
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- 19 6月, 2009 2 次提交
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由 Steven Rostedt 提交于
In case gcc does something funny with the stack frames, or the return from function code, we would like to detect that. An arch may implement passing of a variable that is unique to the function and can be saved on entering a function and can be tested when exiting the function. Usually the frame pointer can be used for this purpose. This patch also implements this for x86. Where it passes in the stack frame of the parent function, and will test that frame on exit. There was a case in x86_32 with optimize for size (-Os) where, for a few functions, gcc would align the stack frame and place a copy of the return address into it. The function graph tracer modified the copy and not the actual return address. On return from the funtion, it did not go to the tracer hook, but returned to the parent. This broke the function graph tracer, because the return of the parent (where gcc did not do this funky manipulation) returned to the location that the child function was suppose to. This caused strange kernel crashes. This test detected the problem and pointed out where the issue was. This modifies the parameters of one of the functions that the arch specific code calls, so it includes changes to arch code to accommodate the new prototype. Note, I notice that the parsic arch implements its own push_return_trace. This is now a generic function and the ftrace_push_return_trace should be used instead. This patch does not touch that code. Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Helge Deller <deller@gmx.de> Cc: Kyle McMartin <kyle@mcmartin.ca> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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由 FUJITA Tomonori 提交于
Signed-off-by: NFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Acked-by: NJoerg Roedel <joerg.roedel@amd.com> Acked-by: NIngo Molnar <mingo@elte.hu> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 15 6月, 2009 1 次提交
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由 Pekka Enberg 提交于
The Kconfig options of kmemcheck are hidden under arch/x86 which makes porting to other architectures harder. To fix that, move the Kconfig bits to lib/Kconfig.kmemcheck and introduce a CONFIG_HAVE_ARCH_KMEMCHECK config option that architectures can define. Signed-off-by: NPekka Enberg <penberg@cs.helsinki.fi> [rebased for mainline inclusion] Signed-off-by: NVegard Nossum <vegard.nossum@gmail.com>
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- 03 6月, 2009 1 次提交
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由 K.Prasad 提交于
This patch introduces the arch-specific implementation of the generic hardware breakpoints in kernel/hw_breakpoint.c inside x86 specific directories. It contains functions which help to validate and serve requests using Hardware Breakpoint registers on x86 processors. [ fweisbec@gmail.com: fix conflict against kmemcheck ] Original-patch-by: NAlan Stern <stern@rowland.harvard.edu> Signed-off-by: NK.Prasad <prasad@linux.vnet.ibm.com> Reviewed-by: NAlan Stern <stern@rowland.harvard.edu> Signed-off-by: NFrederic Weisbecker <fweisbec@gmail.com>
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- 29 5月, 2009 1 次提交
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由 Hidetoshi Seto 提交于
Use tab. Signed-off-by: NHidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: NH. Peter Anvin <hpa@zytor.com>
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