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* generic: reduce stack pressure in sched_affinityMike Travis2008-04-191-23/+23
| | | | | | | | | | | | | | | * Modify sched_affinity functions to pass cpumask_t variables by reference instead of by value. * Use new set_cpus_allowed_ptr function. Depends on: [sched-devel]: sched: add new set_cpus_allowed_ptr function Cc: Paul Jackson <pj@sgi.com> Cc: Cliff Wickman <cpw@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: use new set_cpus_allowed_ptr functionMike Travis2008-04-198-58/+61
| | | | | | | | | | | | | | | | | | | | | | * Use new set_cpus_allowed_ptr() function added by previous patch, which instead of passing the "newly allowed cpus" cpumask_t arg by value, pass it by pointer: -int set_cpus_allowed(struct task_struct *p, cpumask_t new_mask) +int set_cpus_allowed_ptr(struct task_struct *p, const cpumask_t *new_mask) * Cleanup uses of CPU_MASK_ALL. * Collapse other NR_CPUS changes to arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c Use pointers to cpumask_t arguments whenever possible. Depends on: [sched-devel]: sched: add new set_cpus_allowed_ptr function Cc: Len Brown <len.brown@intel.com> Cc: Dave Jones <davej@codemonkey.org.uk> Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* cpumask: Cleanup more uses of CPU_MASK and NODE_MASKMike Travis2008-04-191-1/+1
| | | | | | | | | | | | | | | * Replace usages of CPU_MASK_NONE, CPU_MASK_ALL, NODE_MASK_NONE, NODE_MASK_ALL to reduce stack requirements for large NR_CPUS and MAXNODES counts. * In some cases, the cpumask variable was initialized but then overwritten with another value. This is the case for changes like this: - cpumask_t oldmask = CPU_MASK_ALL; + cpumask_t oldmask; Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: reduce memory and stack usage in intel_cacheinfoMike Travis2008-04-191-30/+40
| | | | | | | | | | | | | | | | | | | * Change the following static arrays sized by NR_CPUS to per_cpu data variables: _cpuid4_info *cpuid4_info[NR_CPUS]; _index_kobject *index_kobject[NR_CPUS]; kobject * cache_kobject[NR_CPUS]; * Remove the local NR_CPUS array with a kmalloc'd region in show_shared_cpu_map(). Also some minor complaints from checkpatch.pl fixed. Cc: H. Peter Anvin <hpa@zytor.com> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: kgdb build fixHarvey Harrison2008-04-181-2/+2
| | | | | | | TF_MASK is no longer defined, use X86_EFLAGS_TF. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-kgdbLinus Torvalds2008-04-185-1/+598
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-kgdb: kgdb: always use icache flush for sw breakpoints kgdb: fix SMP NMI kgdb_handle_exception exit race kgdb: documentation fixes kgdb: allow static kgdbts boot configuration kgdb: add documentation kgdb: Kconfig fix kgdb: add kgdb internal test suite kgdb: fix several kgdb regressions kgdb: kgdboc pl011 I/O module kgdb: fix optional arch functions and probe_kernel_* kgdb: add x86 HW breakpoints kgdb: print breakpoint removed on exception kgdb: clocksource watchdog kgdb: fix NMI hangs kgdb: fix kgdboc dynamic module configuration kgdb: document parameters x86: kgdb support consoles: polling support, kgdboc kgdb: core uaccess: add probe_kernel_write()
| * kgdb: fix several kgdb regressionsJason Wessel2008-04-172-1/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | kgdb core fixes: - Check to see that mm->mmap_cache is not null before calling flush_cache_range(), else on arch=ARM it will cause a fatal fault. - Breakpoints should only be restored if they are in the BP_ACTIVE state. - Fix a typo in comments to "kgdb_register_io_module" x86 kgdb fixes: - Fix the x86 arch handler such that on a kill or detach that the appropriate cleanup on the single stepping flags gets run. - Add in the DIE_NMIWATCHDOG call for x86_64 - Touch the nmi watchdog before returning the system to normal operation after performing any kind of kgdb operation, else the possibility exists to trigger the watchdog. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * kgdb: add x86 HW breakpointsJason Wessel2008-04-172-0/+154
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add HW breakpoints into the arch specific portion of x86 kgdb. In the current x86 kernel.org kernels HW breakpoints are changed out in lazy fashion because there is no infrastructure around changing them when changing to a kernel task or entering the kernel mode via a system call. This lazy approach means that if a user process uses HW breakpoints the kgdb will loose out. This is an acceptable trade off because the developer debugging the kernel is assumed to know what is going on system wide and would be aware of this trade off. There is a minor bug fix to the kgdb core so as to correctly call the hw breakpoint functions with a valid value from the enum. There is also a minor change to the x86_64 startup code when using early HW breakpoints. When the debugger is connected, the cpu startup code must not zero out the HW breakpoint registers or you cannot hit the breakpoints you are interested in, in the first place. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * kgdb: fix NMI hangsJason Wessel2008-04-173-3/+19
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes the hang regression with kgdb when the NMI interrupt comes in while the master core is returning from an exception. Adjust the NMI logic such that KGDB will not stop NMI exceptions from occurring by in general returning NOTIFY_DONE. It is not possible to distinguish the debug NMI sync vs the normal NMI apic interrupt so kgdb needs to catch the unknown NMI if it the debugger was previously active on one of the cpus. Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * x86: kgdb supportIngo Molnar2008-04-172-0/+418
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | simplified and streamlined kgdb support on x86, both 32-bit and 64-bit, based on patch from: Subject: kgdb: core-lite From: Jason Wessel <jason.wessel@windriver.com> [ and countless other authors - see the patch for details. ] Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Jan Kiszka <jan.kiszka@web.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
* | Merge branch 'for-linus' of ↵Linus Torvalds2008-04-18114-6911/+5825
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: (613 commits) x86: standalone trampoline code x86: move suspend wakeup code to C x86: coding style fixes to arch/x86/kernel/acpi/sleep.c x86: setup_trampoline() - fix section mismatch warning x86: section mismatch fixes, #1 x86: fix paranoia about using BIOS quickboot mechanism. x86: print out buggy mptable x86: use cpu_online() x86: use cpumask_of_cpu() x86: remove unnecessary tmp local variable x86: remove unnecessary memset() x86: use ioapic_read_entry() and ioapic_write_entry() x86: avoid redundant loop in io_apic_level_ack_pending() x86: remove superfluous initialisation in boot code. x86: merge mpparse_{32,64}.c x86: unify mp_register_gsi x86: unify mp_config_acpi_legacy_irqs x86: unify mp_register_ioapic x86: unify uniq_io_apic_id x86: unify smp_scan_config ...
| * | x86: standalone trampoline codeIngo Molnar2008-04-173-15/+19
| | | | | | | | | | | | | | | | | | | | | move the trampoline setup code out of smpboot.c - UP kernels can have suspend support too. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move suspend wakeup code to CPavel Machek2008-04-1723-600/+484
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move wakeup code to .c, so that video mode setting code can be shared between boot and wakeup. Remove nasty assembly code in 64-bit case by re-using trampoline code. Stack setup was fixed to clear high 16bits of %esp, maybe that fixes some machines. .c code sharing and morse code was done H. Peter Anvin, Sam Ravnborg reviewed kbuild related stuff, and it seems okay to him. Rafael did some cleanups. [rjw: * Made the patch stop breaking compilation on x86-32 * Added arch/x86/kernel/acpi/sleep.h * Got rid of compiler warnings in arch/x86/kernel/acpi/sleep.c * Fixed 32-bit compilation on x86-64 systems * Added include/asm-x86/trampoline.h and fixed the non-SMP compilation on 64-bit x86 * Removed arch/x86/kernel/acpi/sleep_32.c which was not used * Fixed some breakage caused by the integration of smpboot.c done under us in the meantime] Signed-off-by: Pavel Machek <pavel@suse.cz> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: coding style fixes to arch/x86/kernel/acpi/sleep.cPaolo Ciarrocchi2008-04-171-1/+1
| | | | | | | | | | | | | | | Signed-off-by: Paolo Ciarrocchi <paolo.ciarrocchi@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: setup_trampoline() - fix section mismatch warningJacek Luczak2008-04-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | this patch fixes section mismatch warnings (on x86_64 host) in setup_trampoline(), which was referencing __initdata variables trampoline_data and trampoline_end. Warning messages: WARNING: arch/x86/kernel/built-in.o(.cpuinit.text+0x2b6a): Section mismatch in reference from the function setup_trampoline() to the variable .init.data:trampoline_data The function __cpuinit setup_trampoline() references a variable __initdata trampoline_data. If trampoline_data is only used by setup_trampoline then annotate trampoline_data with a matching annotation. WARNING: arch/x86/kernel/built-in.o(.cpuinit.text+0x2b71): Section mismatch in reference from the function setup_trampoline() to the variable .init.data:trampoline_end The function __cpuinit setup_trampoline() references a variable __initdata trampoline_end. If trampoline_end is only used by setup_trampoline then annotate trampoline_end with a matching annotation. Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: section mismatch fixes, #1Jacek Luczak2008-04-171-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes mismatch warnings in smp_checks() (in arch/x86/kernel/smpboot.c): WARNING: arch/x86/kernel/built-in.o(.text+0x11922): Section mismatch in reference from the function smp_checks() to the variable .cpuinit.data:smp_b_stepping The function smp_checks() references the variable __cpuinitdata smp_b_stepping. This is often because smp_checks lacks a __cpuinitdata annotation or the annotation of smp_b_stepping is wrong. Signed-off-by: Jacek Luczak <luczak.jacek@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: fix paranoia about using BIOS quickboot mechanism.Alok Kataria2008-04-171-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | > > Make sure that we clear the "shutdown status flag" in the CMOS > > register after each CPU is brought up. This fixes a problem where the > > "shutdown status flag" may remain set when a CPU is brought up after > > booting. > > btw., what problem does this result in, exactly? The shutdown status flag set to "0xA", corresponds to "JMP double word request without INT init". This JMP at reboot time is at an unintended location. And results in Triple faults in our case. Though this error at reboot can be safely ignored in a VM environment, am not sure what the effect would be on a physical system. May be it will result in a triple fault and an eventual hardware reset thus masking this BUG in the kernel. This fix just makes sure that we reset that status flag after initialization is done. Fix paranoia about using BIOS quickboot mechanism. Make sure that we clear the "shutdown status flag" in the CMOS register after each CPU is brought up. This fixes a problem where the "shutdown status flag" may remain set when a CPU is brought up after booting. Signed-off-by: Alok N Kataria <akataria@vmware.com> Signed-off-by: Dan Arai <arai@vmware.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: print out buggy mptableYinghai Lu2008-04-171-4/+7
| | | | | | | | | | | | | | | | | | | | | print out buggy mptable, instead of skipping it quietly Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: use cpu_online()Akinobu Mita2008-04-171-2/+2
| | | | | | | | | | | | | | | Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: use cpumask_of_cpu()Akinobu Mita2008-04-172-7/+2
| | | | | | | | | | | | | | | | | | | | | Use cpumask_of_cpu() rather than the pair of cpus_clear() and cpu_set(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: remove unnecessary tmp local variableAkinobu Mita2008-04-172-4/+2
| | | | | | | | | | | | | | | | | | | | | There is no reason to use obscurer name. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: remove unnecessary memset()Akinobu Mita2008-04-171-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | No need to clear the memory allocated by alloc_bootmem(). It is already filled with zero. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: use ioapic_read_entry() and ioapic_write_entry()Akinobu Mita2008-04-172-27/+8
| | | | | | | | | | | | | | | | | | | | | | | | Remove duplicate code by using ioapic_read_entry() and ioapic_write_entry() in io_apic_{32,64}.c Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: avoid redundant loop in io_apic_level_ack_pending()Akinobu Mita2008-04-171-4/+7
| | | | | | | | | | | | | | | | | | | | | | | | If one can find an ack pending pin, there is no need to check the rest of them. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: merge mpparse_{32,64}.cAlexey Starikovskiy2008-04-173-1002/+11
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify mp_register_gsiAlexey Starikovskiy2008-04-172-10/+82
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify mp_config_acpi_legacy_irqsAlexey Starikovskiy2008-04-171-4/+16
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify mp_register_ioapicAlexey Starikovskiy2008-04-172-11/+15
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify uniq_io_apic_idAlexey Starikovskiy2008-04-172-1/+21
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify smp_scan_configAlexey Starikovskiy2008-04-172-6/+41
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify get_smp_configAlexey Starikovskiy2008-04-172-10/+20
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify construct_default_ioirq_mptableAlexey Starikovskiy2008-04-172-12/+21
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify smp_read_mpcAlexey Starikovskiy2008-04-172-17/+35
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify mp_bus_infoAlexey Starikovskiy2008-04-172-13/+40
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: unify arch/x86/kernel/mpparse_64.cAlexey Starikovskiy2008-04-172-54/+10
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: add early flags to mpparse_32.cAlexey Starikovskiy2008-04-171-10/+47
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: lindent mpparse_32.cAlexey Starikovskiy2008-04-171-206/+214
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move mp_register_lapic_address to boot.cAlexey Starikovskiy2008-04-173-21/+11
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move mp_register_lapic to boot.cAlexey Starikovskiy2008-04-173-31/+16
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move up & smp variables to setup.cAlexey Starikovskiy2008-04-176-34/+8
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move mp_irqs to io_apic_64.cAlexey Starikovskiy2008-04-172-6/+6
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move mp_irqs to io_apics_32.cAlexey Starikovskiy2008-04-172-6/+6
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move mp_ioapic_routing to boot.cAlexey Starikovskiy2008-04-173-12/+4
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move mp_ioapics to io_apic_64.cAlexey Starikovskiy2008-04-172-4/+4
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move mp_ioapics to io_apic_32.cAlexey Starikovskiy2008-04-172-5/+4
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: don't set io apic features if io-apic is not enabled, fixIngo Molnar2008-04-171-4/+4
| | | | | | | | | | | | Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: don't set IO APIC features if IO APIC is not enabledAlexey Starikovskiy2008-04-171-3/+21
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move x86_bios_cpu_apicid_init to smpboot.cAlexey Starikovskiy2008-04-172-7/+1
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move x86_cpu_to_apicid_init to smpboot.cAlexey Starikovskiy2008-04-172-7/+2
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
| * | x86: move phys_cpu_present_map to setup.cAlexey Starikovskiy2008-04-174-13/+4
| | | | | | | | | | | | | | | Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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