- 07 Dec, 2006 40 commits
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Andi Kleen authored
We're already well protected against module unloads because module unload uses stop_machine(). The only exception is NMIs, but other users already risk lockless accesses here. This avoids some hackery in lockdep and also a potential deadlock This matches what i386 does. Signed-off-by:Andi Kleen <ak@suse.de>
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Andi Kleen authored
This avoids trouble with the page fault handler if the fault happens inside an interrupt context. Suggested by Linus Cc: jbeulich@novell.com Signed-off-by: -
Arjan van de Ven authored
On the Core2 cpus, the rdtsc instruction is not serializing (as defined in the architecture reference since rdtsc exists) and due to the deep speculation of these cores, it's possible that you can observe time go backwards between cores due to this speculation. Since the kernel already deals with this with the SYNC_RDTSC flag, the solution is simple, only assume that the instruction is serializing on family 15... The price one pays for this is a slightly slower gettimeofday (by a dozen or two cycles), but that increase is quite small to pay for a really-going-forward tsc counter. Signed-off-by:
Arjan van de Ven <arjan@linux.intel.com> Signed-off-by:
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Muli Ben-Yehuda authored
Spotted by d binderman <dcb314@hotmail.com>. Signed-off-by:
Muli Ben-Yehuda <muli@il.ibm.com> Signed-off-by:
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Andi Kleen authored
There is no guarantee that two RDTSCs in a row are monotonic, so don't assume it on single core AMD systems. This will make gettimeofday slower again Signed-off-by: -
Adrian Bunk authored
-mregparm=3 has been enabled by default for some time on i386, and AFAIK there aren't any problems with it left. This patch removes the REGPARM config option and sets -mregparm=3 unconditionally. Signed-off-by:
Adrian Bunk <bunk@stusta.de> Signed-off-by:
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Yinghai Lu authored
remove unused acpi_found_madt in mparse.c Signed-off-by:
Yinghai Lu <yinghai.lu@amd.com> Signed-off-by:
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Dave Jones authored
Sometimes the soft watchdog fires after we're done oopsing. See http://projects.info-pull.com/mokb/MOKB-25-11-2006.html for an example. AK: changed to touch_nmi_watchdog() Signed-off-by:
Dave Jones <davej@redhat.com> Signed-off-by:
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Rafael J. Wysocki authored
Make mce_remove_device() clean up the kobject in per_cpu(device_mce, cpu) after it has been unregistered. Signed-off-by:
Rafael J. Wysocki <rjw@sisk.pl> Signed-off-by:
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Adrian Bunk authored
One ARCH_DISCONTIGMEM_ENABLE option is enough. Signed-off-by:
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Yinghai Lu authored
interrupt array is referred for idt vectors instead of NR_IRQS, so change size to NR_VECTORS - FIRST_EXTERNAL_VECTOR. Also change to static. Signed-off-by:
Yinghai Lu <yinghai@amd.com> Signed-off-by:
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Yinghai Lu authored
idt_table is in the .bss section, so clear_bss need to called at first Signed-off-by:
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Chuck Ebbert authored
Add sysctl for kstack_depth_to_print. This lets users change the amount of raw stack data printed in dump_stack() without having to reboot. Signed-off-by:
Chuck Ebbert <76306.1226@compuserve.com> Signed-off-by:
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Wink Saville authored
The comments for MSR_FS_BASE & MSR_GS_BASE were transposed. Signed-off-by:
Wink Saville <wink@saville.com> Signed-off-by:
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David Rientjes authored
Remove unused GET_APIC_VERSION call from clear_local_APIC() and __setup_APIC_LVTT(). Reported by D Binderman <dcb314@hotmail.com>. Cc: Andi Kleen <ak@suse.de> Cc: Ingo Molnar <mingo@redhat.com> Signed-off-by:
David Rientjes <rientjes@cs.washington.edu> Signed-off-by:
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Dave Jones authored
We do the exact same printk about a dozen lines above with no intermediate printk's. Signed-off-by:
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Artiom Myaskouvskey authored
When using memmap kernel parameter in EFI boot we should also add to memory map memory regions of runtime services to enable their mapping later. AK: merged and cleaned up the patch Signed-off-by:
Artiom Myaskouvskey <artiom.myaskouvskey@intel.com> Signed-off-by:
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Karsten Wiese authored
Read/Write APIC_LVTPC and APIC_LVTTHMR only, if get_maxlvt() returns certain values. This is done like everywhere else in i386/kernel/apic.c, so I guess its correct. Suspends/Resumes to disk fine and eleminates an smp_error_interrupt() here on a K8. AK: ported to x86-64 too Signed-off-by:
Karsten Wiese <fzu@wemgehoertderstaat.de> Signed-off-by:
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Andi Kleen authored
There are two consumers of apic=: the apic debug level and the low level generic architecture code. early_param would warn when the low level code rejected "debug". Avoid this. Signed-off-by: -
Stephane Eranian authored
Here is a small patch for i386 which adds a cpufeature flag and detection code for Intel's Branch Trace Store (BTS) feature. This feature can be found on Intel P4 and Core 2 processors among others. It can also be used by perfmon. changelog: - add CPU_FEATURE_BTS - add Branch Trace Store detection signed-off-by:
stephane eranian <eranian@hpl.hp.com> Signed-off-by:
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Stephane Eranian authored
Here is a small patch for x86-64 which adds a cpufeature flag and detection code for Intel's Branch Trace Store (BTS) feature. This feature can be found on Intel P4 and Core 2 processors among others. It can also be used by perfmon. changelog: - add CPU_FEATURE_BTS - add Branch Trace Store detection signed-off-by:
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Adrian Bunk authored
irq_vector[] can now become static. Signed-off-by:
Eric W. Biederman <ebiederm@xmission.com> Acked-by:
Ingo Molnar <mingo@redhat.com> Signed-off-by:
Andrew Morton <akpm@osdl.org>
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Adrian Bunk authored
The Coverity checker noted that bad things might happen if find_isa_irq_apic() returned -1. [akpm@osdl.org: add debugging checks] Signed-off-by:
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Artiom Myaskouvskey authored
Function efi_get_time called not only during init kernel phase but also during suspend (from get_cmos_time). When it is called from get_cmos_time the corresponding runtime service should be called in virtual and not in physical mode. Signed-off-by:
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Siddha, Suresh B authored
Move the irqbalance quirks for E7320/E7520/E7525(Errata 23 in http://download.intel.com/design/chipsets/specupdt/30304203.pdf) to early quirks. And add a PCI quirk for these platforms to check(which happens very late during the boot) if the APIC routing is indeed set to default flat mode. This fixes the breakage(in x86_64) of this quirk due to cpu hotplug which selects physical mode instead of the logical flat(as needed for this errata workaround). Signed-off-by:
Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by:
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Siddha, Suresh B authored
Add genapic_force. Used by the next Intel quirks patch. Signed-off-by:
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Siddha, Suresh B authored
Change the 'no_control' field in the cpu struct to a more positive and better term 'hotpluggable'. And change(/cleanup) the logic accordingly. Signed-off-by:
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Siddha, Suresh B authored
Add 'enable_cpu_hotplug' flag and when cleared, the hotplug control file ("online") will not be added under /sys/devices/system/cpu/cpuX/ Next patch doing PCI quirks will use this. Signed-off-by: -
Siddha, Suresh B authored
Mechanism of selecting physical mode in genapic when cpu hotplug is enabled on x86_64, broke the quirk(quirk_intel_irqbalance()) introduced for working around the transposing interrupt message errata in E7520/E7320/E7525 (revision ID 0x9 and below. errata #23 in http://download.intel.com/design/chipsets/specupdt/30304203.pdf). This errata requires the mode to be in logical flat, so that interrupts can be directed to more than one cpu(and thus use hardware IRQ balancing enabled by BIOS on these platforms). Following four patches fixes this by moving the quirk to early quirk and forcing the x86_64 genapic selection to logical flat on these platforms. Thanks to Shaohua for pointing out the breakage. This patch: Add write_pci_config_byte() to direct PCI access routines Signed-off-by:
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Vivek Goyal authored
o Convert more absolute symbols to section relative to keep the theme in vmlinux.lds.S file and to avoid problem if kernel is relocated. o Also put a message so that in future people can be aware of it and avoid introducing absolute symbols. Signed-off-by:
Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by:
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Vivek Goyal authored
o On some platforms like avr32, section init comes before .text and not necessarily a symbol's relative position w.r.t _text is positive. In such cases assembler detects the overflow and emits warning. This patch fixes it. Signed-off-by:
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Adrian Bunk authored
Make the needlessly global alloc_gdt() static. (against) pda-percpu-init Signed-off-by:
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Jan Beulich authored
Until not so long ago, there were system log messages pointing to inconsistent MTRR setup of the video frame buffer caused by the way vesafb and X worked. While vesafb was fixed meanwhile, I believe fixing it there only hides a shortcoming in the MTRR code itself, in that that code is not symmetric with respect to the ordering of attempts to set up two (or more) regions where one contains the other. In the current shape, it permits only setting up sub-regions of pre-exisiting ones. The patch below makes this symmetric. While working on that I noticed a few more inconsistencies in that code, namely - use of 'unsigned int' for sizes in many, but not all places (the patch is converting this to use 'unsigned long' everywhere, which specifically might be necessary for x86-64 once a processor supporting more than 44 physical address bits would become available) - the code to correct inconsistent settings during secondary processor startup tried (if necessary) to correct, among other things, the value in IA32_MTRR_DEF_TYPE, however the newly computed value would never get used (i.e. stored in the respective MSR) - the generic range validation code checked that the end of the to-be-added range would be above 1MB; the value checked should have been the start of the range - when contained regions are detected, previously this was allowed only when the old region was uncacheable; this can be symmetric (i.e. the new region can also be uncacheable) and even further as per Intel's documentation write-trough and write-back for either region is also compatible with the respective opposite in the other Signed-off-by:
Jan Beulich <jbeulich@novell.com> Signed-off-by:
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Jan Beulich authored
Make pmd_bad() symmetrical to pgd_bad() and pud_bad(). At once, simplify them all. TBD: tighten down the checks again as suggested by Hugh D. Signed-off-by:
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Jan Beulich authored
Avoid inclusion of code that's dead for x86-64. Signed-off-by:
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Jan Beulich authored
The function doesn't exist (anymore). Signed-off-by:
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Jan Beulich authored
Just like on x86-64, don't touch foreign CPUs' memory if the watchdog isn't enabled at all. Signed-off-by:
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Jan Beulich authored
While not strictly required with the current code (as the upper half of page table entries generated by __set_fixmap() cannot be non-zero due to the second parameter of this function being 'unsigned long'), the use of set_pte() in __set_fixmap() in the context of clear_fixmap() is still improper with CONFIG_X86_PAE (see the respective comment in include/asm-i386/pgtable-3level.h) and would turn into a bug if that second parameter ever gets changed to a 64-bit type. Signed-off-by:
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Andi Kleen authored
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Ernie Petrides authored
The final line of /proc/<pid>/maps on x86_64 for native 64-bit tasks shows an incorrect ending address and incorrect permissions. There is only a single page mapped in this vsyscall region, and it is accessible for both read and execute. The patch below fixes this. (Since 32-bit-compat tasks have a real vma with correct perms/range, no change is necessary for that scenario.) Before the patch, a "cat /proc/self/maps | tail -1" shows this: ffffffffff600000-ffffffffffe00000 ---p 00000000 [...] After the patch, this is the output: ffffffffff600000-ffffffffff601000 r-xp 00000000 [...] Signed-off-by:Ernie Petrides <petrides@redhat.com> Signed-off-by:
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