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2009-07-10Doc: move Documentation/exception.txt into x86 subdirAmerigo Wang
exception.txt only explains the code on x86, so it's better to move it into Documentation/x86 directory. And also rename it to exception-tables.txt which looks much more reasonable. This patch is on top of the previous one. Signed-off-by: WANG Cong <amwang@redhat.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-06-11Merge branch 'linus' into x86/mce3Ingo Molnar
Conflicts: arch/x86/kernel/cpu/mcheck/mce_64.c arch/x86/kernel/irq.c Merge reason: Resolve the conflicts above. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-11x86, mce: Add boot options for corrected errorsHidetoshi Seto
This patch introduces three boot options (no_cmci, dont_log_ce and ignore_ce) to control handling for corrected errors. The "mce=no_cmci" boot option disables the CMCI feature. Since CMCI is a new feature so having boot controls to disable it will be a help if the hardware is misbehaving. The "mce=dont_log_ce" boot option disables logging for corrected errors. All reported corrected errors will be cleared silently. This option will be useful if you never care about corrected errors. The "mce=ignore_ce" boot option disables features for corrected errors, i.e. polling timer and cmci. All corrected events are not cleared and kept in bank MSRs. Usually this disablement is not recommended, however it will be a help if there are some conflict with the BIOS or hardware monitoring applications etc., that clears corrected events in banks instead of OS. [ And trivial cleanup (space -> tab) for doc is included. ] Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> LKML-Reference: <4A30ACDF.5030408@jp.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-10Merge branch 'x86-mm-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'x86-mm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (22 commits) x86: fix system without memory on node0 x86, mm: Fix node_possible_map logic mm, x86: remove MEMORY_HOTPLUG_RESERVE related code x86: make sparse mem work in non-NUMA mode x86: process.c, remove useless headers x86: merge process.c a bit x86: use sparse_memory_present_with_active_regions() on UMA x86: unify 64-bit UMA and NUMA paging_init() x86: Allow 1MB of slack between the e820 map and SRAT, not 4GB x86: Sanity check the e820 against the SRAT table using e820 map only x86: clean up and and print out initial max_pfn_mapped x86/pci: remove rounding quirk from e820_setup_gap() x86, e820, pci: reserve extra free space near end of RAM x86: fix typo in address space documentation x86: 46 bit physical address support on 64 bits x86, mm: fault.c, use printk_once() in is_errata93() x86: move per-cpu mmu_gathers to mm/init.c x86: move max_pfn_mapped and max_low_pfn_mapped to setup.c x86: unify noexec handling x86: remove (null) in /sys kernel_page_tables ...
2009-06-03x86, mce: switch x86 machine check handler to Monarch election.Andi Kleen
On Intel platforms machine check exceptions are always broadcast to all CPUs. This patch makes the machine check handler synchronize all these machine checks, elect a Monarch to handle the event and collect the worst event from all CPUs and then process it first. This has some advantages: - When there is a truly data corrupting error the system panics as quickly as possible. This improves containment of corrupted data and makes sure the corrupted data never hits stable storage. - The panics are synchronized and do not reenter the panic code on multiple CPUs (which currently does not handle this well). - All the errors are reported. Currently it often happens that another CPU happens to do the panic first, but reports useless information (empty machine check) because the real error happened on another CPU which came in later. This is a big advantage on Nehalem where the 8 threads per CPU lead to often the wrong CPU winning the race and dumping useless information on a machine check. The problem also occurs in a less severe form on older CPUs. - The system can detect when no CPUs detected a machine check and shut down the system. This can happen when one CPU is so badly hung that that it cannot process a machine check anymore or when some external agent wants to stop the system by asserting the machine check pin. This follows Intel hardware recommendations. - This matches the recommended error model by the CPU designers. - The events can be output in true severity order - When a panic happens on another CPU it makes sure to be actually be able to process the stop IPI by enabling interrupts. The code is extremly careful to handle timeouts while waiting for other CPUs. It can't rely on the normal timing mechanisms (jiffies, ktime_get) because of its asynchronous/lockless nature, so it uses own timeouts using ndelay() and a "SPINUNIT" The timeout is configurable. By default it waits for upto one second for the other CPUs. This can be also disabled. From some informal testing AMD systems do not see to broadcast machine checks, so right now it's always disabled by default on non Intel CPUs or also on very old Intel systems. Includes fixes from Ying Huang Fixed a "ecception" in a comment (H.Seto) Moved global_nwo reset later based on suggestion from H.Seto v2: Avoid duplicate messages [ Impact: feature, fixes long standing problems. ] Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-28x86, mce: improve documentationAndi Kleen
Document that check_interval set to 0 means no polling. Noticed by Hidetoshi Seto Also add a reference from boot options to the sysfs tunables Acked-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-18mm, x86: remove MEMORY_HOTPLUG_RESERVE related codeYinghai Lu
after: | commit b263295dbffd33b0fbff670720fa178c30e3392a | Author: Christoph Lameter <clameter@sgi.com> | Date: Wed Jan 30 13:30:47 2008 +0100 | | x86: 64-bit, make sparsemem vmemmap the only memory model we don't have MEMORY_HOTPLUG_RESERVE anymore. Historically, x86-64 had an architecture-specific method for memory hotplug whereby it scanned the SRAT for physical memory ranges that could be potentially used for memory hot-add later. By reserving those ranges without physical memory, the memmap would be allocated and left dormant until needed. This depended on the DISCONTIG memory model which has been removed so the code implementing HOTPLUG_RESERVE is now dead. This patch removes the dead code used by MEMORY_HOTPLUG_RESERVE. (Changelog authored by Mel.) v2: updated changelog, and remove hotadd= in doc [ Impact: remove dead code ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Reviewed-by: Christoph Lameter <cl@linux-foundation.org> Reviewed-by: Mel Gorman <mel@csn.ul.ie> Workflow-found-OK-by: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <4A0C4910.7090508@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-05-11x86: add extension fields for bootloader type and versionH. Peter Anvin
A long ago, in days of yore, it all began with a god named Thor. There were vikings and boats and some plans for a Linux kernel header. Unfortunately, a single 8-bit field was used for bootloader type and version. This has generally worked without *too* much pain, but we're getting close to flat running out of ID fields. Add extension fields for both type and version. The type will be extended if it the old field is 0xE; the version is a simple MSB extension. Keep /proc/sys/kernel/bootloader_type containing (type << 4) + (ver & 0xf) for backwards compatiblity, but also add /proc/sys/kernel/bootloader_version which contains the full version number. [ Impact: new feature to support more bootloaders ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-11x86: document new bzImage fieldsH. Peter Anvin
Document the new bzImage fields for kernel memory placement. [ Impact: adds documentation ] Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-05-05x86: fix typo in address space documentationH. Peter Anvin
Fix a trivial typo in Documentation/x86/x86_64/mm.txt. [ Impact: documentation only ] Signed-off-by: H. Peter Anvin <hpa@zytor.com> Cc: Rik van Riel <riel@redhat.com>
2009-05-05x86: 46 bit physical address support on 64 bitsRik van Riel
Extend the maximum addressable memory on x86-64 from 2^44 to 2^46 bytes. This requires some shuffling around of the vmalloc and virtual memmap memory areas, to keep them away from the direct mapping of up to 64TB of physical memory. This patch also introduces a guard hole between the vmalloc area and the virtual memory map space. There's really no good reason why we wouldn't have a guard hole there. [ Impact: future hardware enablement ] Signed-off-by: Rik van Riel <riel@redhat.com> LKML-Reference: <20090505172856.6820db22@cuia.bos.redhat.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2009-04-03Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (28 commits) trivial: Update my email address trivial: NULL noise: drivers/mtd/tests/mtd_*test.c trivial: NULL noise: drivers/media/dvb/frontends/drx397xD_fw.h trivial: Fix misspelling of "Celsius". trivial: remove unused variable 'path' in alloc_file() trivial: fix a pdlfush -> pdflush typo in comment trivial: jbd header comment typo fix for JBD_PARANOID_IOFAIL trivial: wusb: Storage class should be before const qualifier trivial: drivers/char/bsr.c: Storage class should be before const qualifier trivial: h8300: Storage class should be before const qualifier trivial: fix where cgroup documentation is not correctly referred to trivial: Give the right path in Documentation example trivial: MTD: remove EOL from MODULE_DESCRIPTION trivial: Fix typo in bio_split()'s documentation trivial: PWM: fix of #endif comment trivial: fix typos/grammar errors in Kconfig texts trivial: Fix misspelling of firmware trivial: cgroups: documentation typo and spelling corrections trivial: Update contact info for Jochen Hein trivial: fix typo "resgister" -> "register" ...
2009-03-30trivial: fix where cgroup documentation is not correctly referred toThadeu Lima de Souza Cascardo
cgroup documentation was moved to Documentation/cgroups/. There are some places that still refer to Documentation/controllers/, Documentation/cgroups.txt and Documentation/cpusets.txt. Fix those. Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Reviewed-by: Li Zefan <lizf@cn.fujitsu.com> Acked-by: Paul Menage <menage@google.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2009-03-05Merge branch 'x86/doc' into x86/coreIngo Molnar
2009-03-05x86/doc: mini-howto for using earlyprintk=dbgpYinghai Lu
[ mingo: small edits and extensions. ] Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Greg KH <gregkh@suse.de> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Alan Stern <stern@rowland.harvard.edu> Cc: Sarah Sharp <sarah.a.sharp@intel.com> Cc: Andrew Morton <akpm@linux-foundation.org> LKML-Reference: <49AF18B7.4050305@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-03-04Merge branches 'x86/apic', 'x86/cpu', 'x86/fixmap', 'x86/mm', 'x86/sched', ↵Ingo Molnar
'x86/setup-lzma', 'x86/signal' and 'x86/urgent' into x86/core
2009-01-15Documentation/x86/boot.txt: modify fieldnameBaodong Chen
Modify field names to the right ones: - start_sys was changed to start_sys_seg - iinitrd_addr_max was changed to ramdisk_max - pad2 was changed to pad2 and pad3 - readmode_swtch was changed to realmode_swtch Signed-off-by: Baodong Chen <[email]chenbdchenbd@gmail.com[email]> Acked-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-01-14bzip2/lzma: update boot protocol specificationH. Peter Anvin
Impact: documentation Update the boot protocol specification to include the currently supported file formats and their magic numbers. Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2009-01-10Merge branch 'x86-fixes-for-linus' of ↵Linus Torvalds
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: (36 commits) x86: fix section mismatch warnings in mcheck/mce_amd_64.c x86: offer frame pointers in all build modes x86: remove duplicated #include's x86: k8 numa register active regions later x86: update Alan Cox's email addresses x86: rename all fields of mpc_table mpc_X to X x86: rename all fields of mpc_oemtable oem_X to X x86: rename all fields of mpc_bus mpc_X to X x86: rename all fields of mpc_cpu mpc_X to X x86: rename all fields of mpc_intsrc mpc_X to X x86: rename all fields of mpc_lintsrc mpc_X to X x86: rename all fields of mpc_iopic mpc_X to X x86: irqinit_64.c init_ISA_irqs should be static Documentation/x86/boot.txt: payload length was changed to payload_length x86: setup_percpu.c fix style problems x86: irqinit_64.c fix style problems x86: irqinit_32.c fix style problems x86: i8259.c fix style problems x86: irq_32.c fix style problems x86: ioport.c fix style problems ...
2009-01-06documentation: update header file pathsRandy Dunlap
Update several Documentation/ files and a few sub-dir files (only one change in each) to reflect changed header files locations. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-04Documentation/x86/boot.txt: payload length was changed to payload_lengthBaodong Chen
Signed-off-by: Baodong Chen <[email]chenbdchenbd@gmail.com[email]> Acked-by: Jiri Kosina <jkosina@suse.cz> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-23Merge branches 'x86/apic', 'x86/cleanups', 'x86/cpufeature', ↵Ingo Molnar
'x86/crashdump', 'x86/debug', 'x86/defconfig', 'x86/detect-hyper', 'x86/doc', 'x86/dumpstack', 'x86/early-printk', 'x86/fpu', 'x86/idle', 'x86/io', 'x86/memory-corruption-check', 'x86/microcode', 'x86/mm', 'x86/mtrr', 'x86/nmi-watchdog', 'x86/pat2', 'x86/pci-ioapic-boot-irq-quirks', 'x86/ptrace', 'x86/quirks', 'x86/reboot', 'x86/setup-memory', 'x86/signal', 'x86/sparse-fixes', 'x86/time', 'x86/uv' and 'x86/xen' into x86/core
2008-12-19x86: PAT: pfnmap documentation update changesvenkatesh.pallipadi@intel.com
Impact: Documentation only. Documentation updates as per Randy Dunlap's comments. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-12-18x86: PAT: update documentation to cover pgprot and remap_pfn related changes ↵venkatesh.pallipadi@intel.com
- v3 Impact: Documentation only. Add documentation related to pgprot_* change. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-12-16x86: documentation fix regarding boot protocolPhilipp Kohlbecher
Impact: clarify documentation Documentation/x86/boot.txt describes payload_offset as the offset from the end of the real-mode code. In fact, it is more accurately described as the offset from the beginning of the protected-mode code, as (a) this is how it is actually calculated and (b) the padding after the real-mode code is not included in the offset. Signed-off-by: Philipp Kohlbecher <xt28@gmx.de> Acked-by: Ian Campbell <ijc@hellion.org.uk> Acked-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-12-16Merge commit 'v2.6.28-rc8' into x86/docIngo Molnar
2008-11-11x86/doc: spelling fix for grubKOSAKI Motohiro
Impact: documentation fix I met okuji-san (GRUB maintainer) yesterday. He said GRuB isn't correct spelled and he want to fix it. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-11x86, 64-bit: update address space documentationJiri Slaby
Impact: documentation update Commit a6523748bddd38bcec11431f57502090b6014a96 (paravirt/x86, 64-bit: move __PAGE_OFFSET to leave a space for hypervisor) changed address space without changing the documentation. Change it according to the code change -- direct mapping start: ffff810000000000 => ffff880000000000 which gives 57 TiB, something between 45 and 46 bits. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-03x86: nmi - nmi_watchdog boot param docs cleanupCyrill Gorcunov
Impact: documentation update 1) nmi_watchdog boot parameter is common to 32/64 bit modes. So move it from Documentation/x86/x86_64/boot-options.txt to Documentation/kernel-parameters.txt and integrate with. 2) Also fix [panic] keyword placement -- it ought to be at first position otherwise it will not be recognized. 3) Document lapic and ioapic keywords. Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-10-28doc/x86: fix doc subdirsUwe Hermann
The Documentation/i386 and Documentation/x86_64 directories and their contents have been moved into Documentation/x86. Fix references to those files accordingly. Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-08-28x86: remove 8254 timer texts from DocumentationLuiz Fernando N. Capitulino
Commit ecd29476ae0143b1c3641edfa76c0fc3e9ad3021 removed the "disable_8254_timer" and "enable_8254_timer" kernel parameters from the kernel but did not remove the references to them from two files in the Documentation directory: kernel-parameters.txt and x86/x86_64/boot-options.txt. This change completes the removal. Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Acked-by: Maciej W. Rozycki <macro@linux-mips.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-08-21x86: PAT documentation updates with debug infovenkatesh.pallipadi@intel.com
Documentation update for PAT. Reflect the latest API details. Also, adds details about ways to get more info in order to debug PAT. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-28documentation: move mtrr.txt to Doc/x86/ subdirRandy Dunlap
Move mtrr.txt to the Documentation/x86/ subdirectory. Add 00-INDEX to the Documentation/x86/ subdirectory. Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Cc: Adrian Bunk <bunk@kernel.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-22x86: doc: boot.txt: fix the size of the start_sys fieldH. Peter Anvin
The start_sys field is two bytes, not four. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-07-22x86: doc: move x86-generic documentation from Doc/x86/i386H. Peter Anvin
The boot protocol, USB legacy support, and zero-page documentation is common to the x86 platform, not i386-specific. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-07-08x86 boot: only pick up additional EFI memmap if add_efi_memmap flagPaul Jackson
Applies on top of the previous patch: x86 boot: add code to add BIOS provided EFI memory entries to kernel Instead of always adding EFI memory map entries (if present) to the memory map after initially finding either E820 BIOS memory map entries and/or kernel command line memmap entries, -instead- only add such additional EFI memory map entries if the kernel boot option: add_efi_memmap is specified. Requiring this 'add_efi_memmap' option is backward compatible with kernels that didn't load such additional EFI memory map entries in the first place, and it doesn't override a configuration that tries to replace all E820 or EFI BIOS memory map entries with ones given entirely on the kernel command line. Signed-off-by: Paul Jackson <pj@sgi.com> Cc: "Yinghai Lu" <yhlu.kernel@gmail.com> Cc: "Jack Steiner" <steiner@sgi.com> Cc: "Mike Travis" <travis@sgi.com> Cc: "Huang Cc: Ying" <ying.huang@intel.com> Cc: "Andi Kleen" <andi@firstfloor.org> Cc: "Andrew Morton" <akpm@linux-foundation.org> Cc: Paul Jackson <pj@sgi.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-07-08Merge branch 'x86/setup' into x86/develIngo Molnar
2008-05-30x86: move x86-specific documentation into Documentation/x86H. Peter Anvin
The current organization of the x86 documentation makes it appear as if the "i386" documentation doesn't apply to x86-64, which is does. Thus, move that documentation into Documentation/x86, and move the x86-64-specific stuff into Documentation/x86/x86_64 with the eventual goal to move stuff that isn't actually 64-bit specific back into Documentation/x86. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
2008-04-17x86: PAT documentationvenkatesh.pallipadi@intel.com
Documentation about PAT related interfaces, intended usage and memory attribute relationship. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>