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* PCI: remove pci_dac_dma_... APIsJan Beulich2007-07-11
| | | | | | | | | | | | | | | | | | Based on replies to a respective query, remove the pci_dac_dma_...() APIs (except for pci_dac_dma_supported() on Alpha, where this function is used in non-DAC PCI DMA code). Signed-off-by: Jan Beulich <jbeulich@novell.com> Cc: Andi Kleen <ak@suse.de> Cc: Jesse Barnes <jesse.barnes@intel.com> Cc: Christoph Hellwig <hch@infradead.org> Acked-by: David Miller <davem@davemloft.net> Cc: Jeff Garzik <jeff@garzik.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* PCI: Use a weak symbol for the empty version of pcibios_add_platform_entries()Michael Ellerman2007-07-11
| | | | | | | | | | | | | | | I'm not sure if this is going to fly, weak symbols work on the compilers I'm using, but whether they work for all of the affected architectures I can't say. I've cc'ed as many arch maintainers/lists as I could find. But assuming they do, we can use a weak empty definition of pcibios_add_platform_entries() to avoid having an empty definition on every arch. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* lots-of-architectures: enable arbitary speed tty supportAlan Cox2007-07-10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the termios2 structure ready for enabling on most platforms. One or two like Sparc are plain weird so have been left alone. Most can use the same structure as ktermios for termios2 (ie the newer ioctl uses the structure matching the current kernel structure) Signed-off-by: Alan Cox <alan@redhat.com> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Ian Molton <spyro@f2s.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Matthew Wilcox <willy@debian.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [IA64] change sh_change_coherence oemcall to use nolockDean Nelson2007-06-26
| | | | | | | | Change sn_change_coherence's ia64_sal_oemcall to the nolock variety since PROM does the locking for this function internally. Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* Rework ptep_set_access_flags and fix sun4cBenjamin Herrenschmidt2007-06-16
| | | | | | | | | | | | | | | | | | | | | Some changes done a while ago to avoid pounding on ptep_set_access_flags and update_mmu_cache in some race situations break sun4c which requires update_mmu_cache() to always be called on minor faults. This patch reworks ptep_set_access_flags() semantics, implementations and callers so that it's now responsible for returning whether an update is necessary or not (basically whether the PTE actually changed). This allow fixing the sparc implementation to always return 1 on sun4c. [akpm@linux-foundation.org: fixes, cleanups] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Hugh Dickins <hugh@veritas.com> Cc: David Miller <davem@davemloft.net> Cc: Mark Fortescue <mark@mtfhpc.demon.co.uk> Acked-by: William Lee Irwin III <wli@holomorphy.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [IA64] Cleanup acpi header to reuse the generic _PDC definesVenki Pallipadi2007-05-24
| | | | | | | | ia64 _PDC setup is defined similar to i386. So, cleanup the header to use generic _PDC defines than using specific defines in ia64. Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Fix bogus messages about system calls not implemented.Tony Luck2007-05-18
| | | | | | | | There are seven legacy system calls that ia64 doesn't implement, but glibc provides equivalent functionality by using more modern system calls. Stop checksyscalls.sh from complaining about these seven. Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] optimize pagefaults a littleChristoph Hellwig2007-05-16
| | | | | | | | | Get rid of the notifier list and call the kprobes code directly if compiled in. This mirrors the changes that recently went into powerpc, s390 and sparc64. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] wire up {signal,timer,event}fd syscallsTony Luck2007-05-14
| | | | Signed-off-by: Tony Luck <tony.luck@intel.com>
* Merge branch 'release' of ↵Linus Torvalds2007-05-11
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Quicklist support for IA64 [IA64] fix Kprobes reentrancy [IA64] SN: validate smp_affinity mask on intr redirect [IA64] drivers/char/snsc_event.c:206: warning: unused variable `p' [IA64] mca.c:121: warning: 'cpe_poll_timer' defined but not used [IA64] Fix - Section mismatch: reference to .init.data:mvec_name [IA64] more warning cleanups [IA64] Wire up epoll_pwait and utimensat [IA64] Fix warnings resulting from type-checking in dev_dbg() [IA64] typo s/kenrel/kernel/
| * [IA64] Quicklist support for IA64Christoph Lameter2007-05-11
| | | | | | | | | | | | | | | | | | IA64 is the origin of the quicklist implementation. So cut out the pieces that are now in core code and modify the functions called. Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] fix Kprobes reentrancyAnil S Keshavamurthy2007-05-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In case of reentrance i.e when a probe handler calls a functions which inturn has a probe, we save a previous kprobe information and just single step the reentrant probe without calling the actual probe handler. During this reentracy period, if an interrupt occurs and if probe happens to trigger in the inturrupt path, then we were corrupting the previous kprobe( as we were overriding the previous kprobe info) info their by crashing the system. This patch fixes this issues by having a an array of previous kprobe info struct(with the array size of 2). This similar technique is not needed on i386 and x86_64 because by default interrupts are turn off in the break/int3 exception handler. Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] SN: validate smp_affinity mask on intr redirectJohn Keller2007-05-11
| | | | | | | | | | | | | | | | | | | | | | | | On SN, only allow one bit to be set in the smp_affinty mask when redirecting an interrupt. Currently setting multiple bits is allowed, but only the first bit is used in determining the CPU to redirect to. This has caused confusion among some customers. [akpm@linux-foundation.org: fixes] Signed-off-by: John Keller <jpk@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Wire up epoll_pwait and utimensatTony Luck2007-05-10
| | | | | | | | | | | | Another day, another pair of new system calls. Signed-off-by: Tony Luck <tony.luck@intel.com>
* | Consolidate asm/poll.hStephen Rothwell2007-05-11
|/ | | | | | | | | | | | | These files are almost all the same. This patch could be made even simpler if we don't mind POLLREMOVE turning up in a few architectures that didn't have it previously (which should be OK as POLLREMOVE is not used anywhere in the current tree). Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6Linus Torvalds2007-05-09
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] wire up pselect, ppoll [IA64] Add TIF_RESTORE_SIGMASK [IA64] unwind did not work for processes born with CLONE_STOPPED [IA64] Optional method to purge the TLB on SN systems [IA64] SPIN_LOCK_UNLOCKED macro cleanup in arch/ia64 [IA64-SN2][KJ] mmtimer.c-kzalloc [IA64] fix stack alignment for ia32 signal handlers [IA64] - Altix: hotplug after intr redirect can crash system [IA64] save and restore cpus_allowed in cpu_idle_wait [IA64] Removal of percpu TR cleanup in kexec code [IA64] Fix some section mismatch errors
| * [IA64] wire up pselect, ppollAlexey Kuznetsov2007-05-08
| | | | | | | | | | | | Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Add TIF_RESTORE_SIGMASKAlexey Dobriyan2007-05-08
| | | | | | | | | | | | | | | | | | Preparation for pselect and ppoll. ia32 compat code not tested. :-( Signed-off-by: Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> Signed-off-by: Alexey Dobriyan <adobriyan@openvz.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Optional method to purge the TLB on SN systemsJack Steiner2007-05-08
| | | | | | | | | | | | | | | | This patch adds an optional method for purging the TLB on SN IA64 systems. The change should not affect any non-SN system. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] - Altix: hotplug after intr redirect can crash systemJohn Keller2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | When redirecting a device interrupt on SN, not all links between platform specific structures are being updated. This can result in a system crash if an interrupt redirection is followed by an unplug of that device. The complete fix also requires a prom update. Though, this patch is backward compatable and not dependent on the prom patch. Signed-off-by: John Keller <jpk@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Fix some section mismatch errorsTony Luck2007-05-07
| | | | | | | | | | | | | | | | | | Section mismatch: reference to ... .init.text:prefill_possible_map from .text between 'setup_per_cpu_areas' and 'cpu_init' .init.text:iosapic_override_isa_irq from .text between 'iosapic_init' and 'iosapic_remove' Signed-off-by: Tony Luck <tony.luck@intel.com>
* | wrap access to thread_infoRoman Zippel2007-05-09
| | | | | | | | | | | | | | | | | | Recently a few direct accesses to the thread_info in the task structure snuck back, so this wraps them with the appropriate wrapper. Signed-off-by: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Always ask the hardware to obtain hardware processor id - ia64Fernando Luis Vazquez Cao2007-05-09
| | | | | | | | | | | | | | | | | | | | | | | | | | Always ask the hardware to determine the hardware processor id in both UP and SMP kernels. Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Andi Kleen <ak@suse.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Remove hardcoding of hard_smp_processor_id on UP systemsFernando Luis Vazquez Cao2007-05-09
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With the advent of kdump, the assumption that the boot CPU when booting an UP kernel is always the CPU with a particular hardware ID (often 0) (usually referred to as BSP on some architectures) is not valid anymore. The reason being that the dump capture kernel boots on the crashed CPU (the CPU that invoked crash_kexec), which may be or may not be that particular CPU. Move definition of hard_smp_processor_id for the UP case to architecture-specific code ("asm/smp.h") where it belongs, so that each architecture can provide its own implementation. Signed-off-by: Fernando Luis Vazquez Cao <fernando@oss.ntt.co.jp> Cc: "Luck, Tony" <tony.luck@intel.com> Acked-by: Andi Kleen <ak@suse.de> Cc: "Eric W. Biederman" <ebiederm@xmission.com> Cc: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | local_t: ia64 extensionMathieu Desnoyers2007-05-08
| | | | | | | | | | | | | | Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | atomic.h: atomic_add_unless as inline. Remove system.h atomic.h circular ↵Mathieu Desnoyers2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | dependency atomic_add_unless as inline. Remove system.h atomic.h circular dependency. I agree (with Andi Kleen) this typeof is not needed and more error prone. All the original atomic.h code that uses cmpxchg (which includes the atomic_add_unless) uses defines instead of inline functions, probably to circumvent a circular dependency between system.h and atomic.h on powerpc (which my patch addresses). Therefore, it makes sense to use inline functions that will provide type checking. atomic_add_unless as inline. Remove system.h atomic.h circular dependency. Digging into the FRV architecture shows me that it is also affected by such a circular dependency. Here is the diff applying this against the rest of my atomic.h patches. It applies over the atomic.h standardization patches. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | atomic.h: add atomic64 cmpxchg, xchg and add_unless to ia64Mathieu Desnoyers2007-05-08
| | | | | | | | | | | | | | Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Clean up mostly unused IOSPACE macrosDavid Gibson2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Most architectures defined three macros, MK_IOSPACE_PFN(), GET_IOSPACE() and GET_PFN() in pgtable.h. However, the only callers of any of these macros are in Sparc specific code, either in arch/sparc, arch/sparc64 or drivers/sbus. This patch removes the redundant macros from all architectures except sparc and sparc64. Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | kdump/kexec: calculate note size at compile timeSimon Horman2007-05-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the size of the per-cpu region reserved to save crash notes is set by the per-architecture value MAX_NOTE_BYTES. Which in turn is currently set to 1024 on all supported architectures. While testing ia64 I recently discovered that this value is in fact too small. The particular setup I was using actually needs 1172 bytes. This lead to very tedious failure mode where the tail of one elf note would overwrite the head of another if they ended up being alocated sequentially by kmalloc, which was often the case. It seems to me that a far better approach is to caclculate the size that the area needs to be. This patch does just that. If a simpler stop-gap patch for ia64 to be squeezed into 2.6.21(.X) is needed then this should be as easy as making MAX_NOTE_BYTES larger in arch/asm-ia64/kexec.h. Perhaps 2048 would be a good choice. However, I think that the approach in this patch is a much more robust idea. Acked-by: Vivek Goyal <vgoyal@in.ibm.com> Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | move die notifier handling to common codeChristoph Hellwig2007-05-08
|/ | | | | | | | | | | | | | | | | | | | | | | This patch moves the die notifier handling to common code. Previous various architectures had exactly the same code for it. Note that the new code is compiled unconditionally, this should be understood as an appel to the other architecture maintainer to implement support for it aswell (aka sprinkling a notify_die or two in the proper place) arm had a notifiy_die that did something totally different, I renamed it to arm_notify_die as part of the patch and made it static to the file it's declared and used at. avr32 used to pass slightly less information through this interface and I brought it into line with the other architectures. [akpm@linux-foundation.org: build fix] [akpm@linux-foundation.org: fix vmalloc_sync_all bustage] [bryan.wu@analog.com: fix vmalloc_sync_all in nommu] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: <linux-arch@vger.kernel.org> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by: Bryan Wu <bryan.wu@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6Linus Torvalds2007-05-07
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] update memory attribute aliasing documentation & test cases [IA64] fail mmaps that span areas with incompatible attributes [IA64] allow WB /sys/.../legacy_mem mmaps [IA64] make ioremap avoid unsupported attributes [IA64] rename ioremap variables to match i386 [IA64] relax per-cpu TLB requirement to DTC [IA64] remove per-cpu ia64_phys_stacked_size_p8 [IA64] Fix example error injection program [IA64] Itanium MC Error Injection Tool: pal_mc_error_inject() interface [IA64] Itanium MC Error Injection Tool: Makefile changes [IA64] Itanium MC Error Injection Tool: Driver sysfs interface [IA64] Itanium MC Error Injection Tool: Doc and sample application [IA64] Itanium MC Error Injection Tool: Kernel configuration
| * Pull mem-attribute into release branchTony Luck2007-04-30
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| | * [IA64] make ioremap avoid unsupported attributesBjorn Helgaas2007-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Example memory map (from HP sx1000 with VGA enabled): 0x00000 - 0x9FFFF supports only WB (cacheable) access 0xA0000 - 0xBFFFF supports only UC (uncacheable) access 0xC0000 - 0xFFFFF supports only WB (cacheable) access pci_read_rom() indirectly uses ioremap(0xC0000) to read the shadow VGA option ROM. ioremap() used to default to a 16MB or 64MB UC kernel identity mapping, which would cause an MCA when reading 0xC0000 since only WB is supported there. X uses reads the option ROM to initialize devices. A smaller test case is: # echo 1 > /sys/bus/pci/devices/0000:aa:03.0/rom # cp /sys/bus/pci/devices/0000:aa:03.0/rom x To avoid this, we can use the same ioremap_page_range() strategy that most architectures use for all ioremaps. These page table mappings come out of the vmalloc area. On ia64, these are in region 5 (0xA... addresses) and typically use 16KB or 64KB mappings instead of 16MB or 64MB mappings. The smaller mappings give more flexibility to use the correct attributes. Signed-off-by: Bjorn Helgaas <bjorn.helgaas@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | Pull percpu-dtc into release branchTony Luck2007-04-30
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| | * | [IA64] relax per-cpu TLB requirement to DTCChen, Kenneth W2007-02-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of pinning per-cpu TLB into a DTR, use DTC. This will free up one TLB entry for application, or even kernel if access pattern to per-cpu data area has high temporal locality. Since per-cpu is mapped at the top of region 7 address, we just need to add special case in alt_dtlb_miss. The physical address of per-cpu data is already conveniently stored in IA64_KR(PER_CPU_DATA). Latency for alt_dtlb_miss is not affected as we can hide all the latency. It was measured that alt_dtlb_miss handler has 23 cycles latency before and after the patch. The performance effect is massive for applications that put lots of tlb pressure on CPU. Workload environment like database online transaction processing or application uses tera-byte of memory would benefit the most. Measurement with industry standard database benchmark shown an upward of 1.6% gain. While smaller workloads like cpu, java also showing small improvement. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * | [IA64] remove per-cpu ia64_phys_stacked_size_p8Chen, Kenneth W2007-02-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It's not efficient to use a per-cpu variable just to store how many physical stack register a cpu has. Ever since the incarnation of ia64 up till upcoming Montecito processor, that variable has "glued" to 96. Having a variable in memory means that the kernel is burning an extra cacheline access on every syscall and kernel exit path. Such "static" value is better served with the instruction patching utility exists today. Convert ia64_phys_stacked_size_p8 into dynamic insn patching. This also has a pleasant side effect of eliminating access to per-cpu area while psr.ic=0 in the kernel exit path. (fixable for per-cpu DTC work, but why bother?) There are some concerns with the default value that the instruc- tion encoded in the kernel image. It shouldn't be concerned. The reasons are: (1) cpu_init() is called at CPU initialization. In there, we find out physical stack register size from PAL and patch two instructions in kernel exit code. The code in question can not be executed before the patching is done. (2) current implementation stores zero in ia64_phys_stacked_size_p8, and that's what the current kernel exit path loads the value with. With the new code, it is equivalent that we store reg size 96 in ia64_phys_stacked_size_p8, thus creating a better safety net. Given (1) above can never fail, having (2) is just a bonus. All in all, this patch allow one less memory reference in the kernel exit path, thus reducing syscall and interrupt return latency; and avoid polluting potential useful data in the CPU cache. Signed-off-by: Ken Chen <kenneth.w.chen@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * | | Pull error-inject into release branchTony Luck2007-04-30
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| | * | | [IA64] Itanium MC Error Injection Tool: pal_mc_error_inject() interfaceFenghua Yu2007-01-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch implements pal_mc_error_inject() interface in kernel. Both physical mode and virtual mode are supported. Signed-off-by: Fenghua Yu <fenghua.yu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | | Merge branch 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6Linus Torvalds2007-05-05
|\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://one.firstfloor.org/home/andi/git/linux-2.6: (231 commits) [PATCH] i386: Don't delete cpu_devs data to identify different x86 types in late_initcall [PATCH] i386: type may be unused [PATCH] i386: Some additional chipset register values validation. [PATCH] i386: Add missing !X86_PAE dependincy to the 2G/2G split. [PATCH] x86-64: Don't exclude asm-offsets.c in Documentation/dontdiff [PATCH] i386: avoid redundant preempt_disable in __unlazy_fpu [PATCH] i386: white space fixes in i387.h [PATCH] i386: Drop noisy e820 debugging printks [PATCH] x86-64: Fix allnoconfig error in genapic_flat.c [PATCH] x86-64: Shut up warnings for vfat compat ioctls on other file systems [PATCH] x86-64: Share identical video.S between i386 and x86-64 [PATCH] x86-64: Remove CONFIG_REORDER [PATCH] x86-64: Print type and size correctly for unknown compat ioctls [PATCH] i386: Remove copy_*_user BUG_ONs for (size < 0) [PATCH] i386: Little cleanups in smpboot.c [PATCH] x86-64: Don't enable NUMA for a single node in K8 NUMA scanning [PATCH] x86: Use RDTSCP for synchronous get_cycles if possible [PATCH] i386: Add X86_FEATURE_RDTSCP [PATCH] i386: Implement X86_FEATURE_SYNC_RDTSC on i386 [PATCH] i386: Implement alternative_io for i386 ... Fix up trivial conflict in include/linux/highmem.h manually. Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * | | | | [PATCH] x86: PARAVIRT: add hooks to intercept mm creation and destructionJeremy Fitzhardinge2007-05-02
| |/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add hooks to allow a paravirt implementation to track the lifetime of an mm. Paravirtualization requires three hooks, but only two are needed in common code. They are: arch_dup_mmap, which is called when a new mmap is created at fork arch_exit_mmap, which is called when the last process reference to an mm is dropped, which typically happens on exit and exec. The third hook is activate_mm, which is called from the arch-specific activate_mm() macro/function, and so doesn't need stub versions for other architectures. It's called when an mm is first used. Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Andi Kleen <ak@suse.de> Cc: linux-arch@vger.kernel.org Cc: James Bottomley <James.Bottomley@SteelEye.com> Acked-by: Ingo Molnar <mingo@elte.hu>
* / / / / PCI: scatterlist.h needs types.hJean Delvare2007-05-02
|/ / / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Most architectures' scatterlist.h use the type dma_addr_t, but omit to include <asm/types.h> which defines it. This could lead to build failures, so let's add the missing includes. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | [NET]: Adding SO_TIMESTAMPNS / SCM_TIMESTAMPNS supportEric Dumazet2007-04-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that network timestamps use ktime_t infrastructure, we can add a new SOL_SOCKET sockopt SO_TIMESTAMPNS. This command is similar to SO_TIMESTAMP, but permits transmission of a 'timespec struct' instead of a 'timeval struct' control message. (nanosecond resolution instead of microsecond) Control message is labelled SCM_TIMESTAMPNS instead of SCM_TIMESTAMP A socket cannot mix SO_TIMESTAMP and SO_TIMESTAMPNS : the two modes are mutually exclusive. sock_recv_timestamp() became too big to be fully inlined so I added a __sock_recv_timestamp() helper function. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> CC: linux-arch@vger.kernel.org Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | [NET]: Introduce SIOCGSTAMPNS ioctl to get timestamps with nanosec resolutionEric Dumazet2007-04-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now network timestamps use ktime_t infrastructure, we can add a new ioctl() SIOCGSTAMPNS command to get timestamps in 'struct timespec'. User programs can thus access to nanosecond resolution. Signed-off-by: Eric Dumazet <dada1@cosmosbay.com> CC: Stephen Hemminger <shemminger@linux-foundation.org> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | [IA64] SGI Altix : fix pcibr_dmamap_ate32() bugMike Habeck2007-04-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On a SGI Altix TIOCP based PCI bus we need to include the ATE_PIO attribute bit if we're mapping a 32bit MSI address. Signed-off-by: Mike Habeck <habeck@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | [PATCH] ia64: desc_empty thinko/typo fixMaciej Zenczykowski2007-04-05
| |_|/ |/| | | | | | | | | | | | | | | | | | | | Just a one-byter for an ia64 thinko/typo - already fixed for i386 and x86_64. Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'release' of ↵Linus Torvalds2007-03-21
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Fix wrong /proc/iomem on SGI Altix [IA64] Altix: ioremap vga_console_iobase [IA64] Fix typo/thinko in crash.c [IA64] Fix get_model_name() for mixed cpu type systems [IA64] min_low_pfn and max_low_pfn calculation fix
| * | | [IA64] min_low_pfn and max_low_pfn calculation fixZou Nan hai2007-03-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We have seen bad_pte_print when testing crashdump on an SN machine in recent 2.6.20 kernel. There are tons of bad pte print (pfn < max_low_pfn) reports when the crash kernel boots up, all those reported bad pages are inside initmem range; That is because if the crash kernel code and data happens to be at the beginning of the 1st node. build_node_maps in discontig.c will bypass reserved regions with filter_rsvd_memory. Since min_low_pfn is calculated in build_node_map, so in this case, min_low_pfn will be greater than kernel code and data. Because pages inside initmem are freed and reused later, we saw pfn_valid check fail on those pages. I think this theoretically happen on a normal kernel. When I check min_low_pfn and max_low_pfn calculation in contig.c and discontig.c. I found more issues than this. 1. min_low_pfn and max_low_pfn calculation is inconsistent between contig.c and discontig.c, min_low_pfn is calculated as the first page number of boot memmap in contig.c (Why? Though this may work at the most of the time, I don't think it is the right logic). It is calculated as the lowest physical memory page number bypass reserved regions in discontig.c. max_low_pfn is calculated include reserved regions in contig.c. It is calculated exclude reserved regions in discontig.c. 2. If kernel code and data region is happen to be at the begin or the end of physical memory, when min_low_pfn and max_low_pfn calculation is bypassed kernel code and data, pages in initmem will report bad. 3. initrd is also in reserved regions, if it is at the begin or at the end of physical memory, kernel will refuse to reuse the memory. Because the virt_addr_valid check in free_initrd_mem. So it is better to fix and clean up those issues. Calculate min_low_pfn and max_low_pfn in a consistent way. Signed-off-by: Zou Nan hai <nanhai.zou@intel.com> Acked-by: Jay Lan <jlan@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | [PATCH] ia64: platform_kernel_launch_event is noop on generic kernelJohn Keller2007-03-18
|/ / / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a missing #define for the platform_kernel_launch_event. Without this fix, a call to platform_kernel_launch_event() becomes a noop on generic kernels. SN systems require this fix to successfully kdump/kexec from certain hardware errors. [bwalle@suse.de: fix it] Signed-off-by: John Keller <jpk@sgi.com> Cc: Bernhard Walle <bwalle@suse.de> Acked-by: Simon Horman <horms@verge.net.au> Acked-by: Jay Lan <jlan@sgi.com> Acked-by: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | [IA64] Remove sparse warning from unwind codeKeith Owens2007-03-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Running ia64 through sparse gives warnings in the unwind code. include/asm-ia64/unwind.h:84:17: error: dubious bitfield without explicit `signed' or `unsigned' Make the bitfield explicitly unsigned. Signed-off-by: Keith Owens <kaos@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | [IA64] kexec: declare ia64_mca_pal_base in mca.h rather than kexec.hSimon Horman2007-03-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * Kexec adds some code to arch/ia64/kernel/smp.c which needs ia64_mca_pal_base, so the kexec patch (actually the kdump patch) declares this per-cpu variable in include/asm-ia64/kexec.h. * ia64_mca_pal_base is defined in arch/ia64/kernel/mca.c, so it seems to me that it would make a lot more sense to declare it in include/asm-ia64/mca.h. Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
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