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* kvm: provide kvm.h for all architecture: fixes headers_installChristian Borntraeger2008-04-02
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently include/linux/kvm.h is not considered by make headers_install, because Kbuild cannot handle " unifdef-$(CONFIG_FOO) += foo.h. This problem was introduced by commit fb56dbb31c4738a3918db81fd24da732ce3b4ae6 Author: Avi Kivity <avi@qumranet.com> Date: Sun Dec 2 10:50:06 2007 +0200 KVM: Export include/linux/kvm.h only if $ARCH actually supports KVM Currently, make headers_check barfs due to <asm/kvm.h>, which <linux/kvm.h> includes, not existing. Rather than add a zillion <asm/kvm.h>s, export kvm. only if the arch actually supports it. Signed-off-by: Avi Kivity <avi@qumranet.com> which makes this an 2.6.25 regression. One way of solving the issue is to enhance Kbuild, but Avi and David conviced me, that changing headers_install is not the way to go. This patch changes the definition for linux/kvm.h to unifdef-y. If  unifdef-y is used for linux/kvm.h "make headers_check" will fail on all architectures without asm/kvm.h. Therefore, this patch also provides asm/kvm.h on all architectures. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Avi Kivity <avi@qumranet.com> Cc: Sam Ravnborg <sam@ravnborg.org Cc: David Woodhouse <dwmw2@infradead.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [IA64] kprobes arch consolidation build fixHarvey Harrison2008-03-06
| | | | | | | | | ia64 named their handler kprobes_fault_handler while all other arches used kprobe_fault_handler. Change the function definition and header declaration. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] remove duplicate code from arch_ptrace()Petr Tesarik2008-03-05
| | | | | | | Remove all code which does exactly the same thing as ptrace_request(). Signed-off-by: Petr Tesarik <ptesarik@suse.cz> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] convert sys_ptrace to arch_ptracePetr Tesarik2008-03-05
| | | | | | | Convert sys_ptrace() to arch_ptrace(). Signed-off-by: Petr Tesarik <ptesarik@suse.cz> Signed-off-by: Tony Luck <tony.luck@intel.com>
* Merge branch 'release' of ↵Linus Torvalds2008-03-04
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | 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 ia64 kprobes compilation [IA64] move gcc_intrin.h from header-y to unifdef-y [IA64] workaround tiger ia64_sal_get_physical_id_info hang [IA64] move defconfig to arch/ia64/configs/ [IA64] Fix irq migration in multiple vector domain [IA64] signal(ia64_ia32): add a signal stack overflow check [IA64] signal(ia64): add a signal stack overflow check [IA64] CONFIG_SGI_SN2 - auto select NUMA and ACPI_NUMA
| * [IA64] fix ia64 kprobes compilationAdrian Bunk2008-03-04
| | | | | | | | | | | | | | | | | | This patch fixes the following compile error with a recent gcc: CC kernel/kprobes.o /home/bunk/linux/kernel-2.6/git/linux-2.6/kernel/kprobes.c:1066: error: __ksymtab_jprobe_return causes a section type conflict Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] move gcc_intrin.h from header-y to unifdef-yDoug Chapman2008-03-04
| | | | | | | | | | | | | | | | | | | | | | When I submitted 0df29025fd0379d5950d206314d0b10a2c8a9607 to ad an #ifdef __KERNEL__ to include/asm-ia64/gcc_intrin.h a few weeks ago I neglected to move gcc_intrin.h from header-y to unifdef-y. Thanks to David Woodhouse for pointing this out. Signed-off-by: Doug Chapman <doug.chapman@hp.com> Signed-off-by: Jarod Wilson <jwilson@redhat.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] workaround tiger ia64_sal_get_physical_id_info hangAlex Chiang2008-03-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes regression introduced in 113134fcbca83619be4c68d0ca66db6093777b5d Intel Tiger platforms hang when calling SAL_GET_PHYSICAL_ID_INFO instead of properly returning -1 for unimplemented, so add a version check. SGI Altix platforms have an incorrect SAL version hard-coded into their prom -- they encode 2.9, but actually implement 3.2 -- so fix it up and allow ia64_sal_get_physical_id_info to keep working. Signed-off-by: Alex Chiang <achiang@hp.com> Acked-by: Russ Anderson <rja@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Fix irq migration in multiple vector domainKenji Kaneshige2008-03-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix the problem that the following error message is sometimes displayed at irq migration when vector domain is enabled. "Unexpected interrupt vector %d on CPU %d is not mapped to any IRQ!" The cause of this problem is an interrupt is sent to the previous target CPU after cleaning up vector to irq mapping table. To clean up vector to irq map on the previous target CPU safty, change the irq migration in multiple vector domain as follows. The original idea is from x86 interrupt management code. - Delay vector to irq table cleanup until the interrupts are sent to new target CPUs. By this, it is ensured that target CPU is completely changed on the interrupt controller side. - Even after the interrupts are sent to new target CPUs, there can be pended interrupts remaining on the previous target CPU. So we need to delay clearning up vector to irq table until the pended interrupt is handled. For this, send IPI to the previous target CPU with lower priority vector and clean up vector to irq table in its handler. This patch affects only to irq migration code with multiple vector domain is enabled. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | Kprobes: indicate kretprobe support in KconfigAnanth N Mavinakayanahalli2008-03-04
|/ | | | | | | | | | | | | | | | | Add CONFIG_HAVE_KRETPROBES to the arch/<arch>/Kconfig file for relevant architectures with kprobes support. This facilitates easy handling of in-kernel modules (like samples/kprobes/kretprobe_example.c) that depend on kretprobes being present in the kernel. Thanks to Sam Ravnborg for helping make the patch more lean. Per Mathieu's suggestion, added CONFIG_KRETPROBES and fixed up dependencies. Signed-off-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Acked-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [IA64] Fix build for sim_defconfigTony Luck2008-02-11
| | | | | | | | | | | | | | Commit bdc807871d58285737d50dc6163d0feb72cb0dc2 broke the build for this config because the sim_defconfig selects CONFIG_HZ=250 but include/asm-ia64/param.h has an ifdef for the simulator to force HZ to 32. So we ended up with a kernel/timeconst.h set for HZ=250 ... which then failed the check for the right HZ value and died with: Drop the #ifdef magic from param.h and make force CONFIG_HZ=32 directly for the simulator. Signed-off-by: Tony Luck <tony.luck@intel.com>
* Merge branch 'release' of ↵Linus Torvalds2008-02-08
|\ | | | | | | | | | | | | | | | | | | | | | | 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 large MCA bootmem allocation [IA64] Simplify cpu_idle_wait [IA64] Synchronize RBS on PTRACE_ATTACH [IA64] Synchronize kernel RSE to user-space and back [IA64] Rename TIF_PERFMON_WORK back to TIF_NOTIFY_RESUME [IA64] Wire up timerfd_{create,settime,gettime} syscalls
| * [IA64] Synchronize RBS on PTRACE_ATTACHPetr Tesarik2008-02-08
| | | | | | | | | | | | | | | | | | When attaching to a stopped process, the RSE must be explicitly synced to user-space, so the debugger can read the correct values. Signed-off-by: Petr Tesarik <ptesarik@suse.cz> CC: Roland McGrath <roland@redhat.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Synchronize kernel RSE to user-space and backPetr Tesarik2008-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is base kernel patch for ptrace RSE bug. It's basically a backport from the utrace RSE patch I sent out several weeks ago. please review. when a thread is stopped (ptraced), debugger might change thread's user stack (change memory directly), and we must avoid the RSE stored in kernel to override user stack (user space's RSE is newer than kernel's in the case). To workaround the issue, we copy kernel RSE to user RSE before the task is stopped, so user RSE has updated data. we then copy user RSE to kernel after the task is resummed from traced stop and kernel will use the newer RSE to return to user. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Petr Tesarik <ptesarik@suse.cz> CC: Roland McGrath <roland@redhat.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Rename TIF_PERFMON_WORK back to TIF_NOTIFY_RESUMEPetr Tesarik2008-02-08
| | | | | | | | | | | | | | | | | | | | | | Since the RSE synchronization will need a TIF_ flag, but all work-to-be-done bits are already used, so we have to multiplex TIF_NOTIFY_RESUME again. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Petr Tesarik <ptesarik@suse.cz> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Wire up timerfd_{create,settime,gettime} syscallsTony Luck2008-02-08
| | | | | | | | | | | | | | Add ia64 hooks for the new syscalls that were added in commit 4d672e7ac79b5ec5cdc90e450823441e20464691 Signed-off-by: Tony Luck <tony.luck@intel.com>
* | CONFIG_HIGHPTE vs. sub-page page tables.Martin Schwidefsky2008-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Background: I've implemented 1K/2K page tables for s390. These sub-page page tables are required to properly support the s390 virtualization instruction with KVM. The SIE instruction requires that the page tables have 256 page table entries (pte) followed by 256 page status table entries (pgste). The pgstes are only required if the process is using the SIE instruction. The pgstes are updated by the hardware and by the hypervisor for a number of reasons, one of them is dirty and reference bit tracking. To avoid wasting memory the standard pte table allocation should return 1K/2K (31/64 bit) and 2K/4K if the process is using SIE. Problem: Page size on s390 is 4K, page table size is 1K or 2K. That means the s390 version for pte_alloc_one cannot return a pointer to a struct page. Trouble is that with the CONFIG_HIGHPTE feature on x86 pte_alloc_one cannot return a pointer to a pte either, since that would require more than 32 bit for the return value of pte_alloc_one (and the pte * would not be accessible since its not kmapped). Solution: The only solution I found to this dilemma is a new typedef: a pgtable_t. For s390 pgtable_t will be a (pte *) - to be introduced with a later patch. For everybody else it will be a (struct page *). The additional problem with the initialization of the ptl lock and the NR_PAGETABLE accounting is solved with a constructor pgtable_page_ctor and a destructor pgtable_page_dtor. The page table allocation and free functions need to call these two whenever a page table page is allocated or freed. pmd_populate will get a pgtable_t instead of a struct page pointer. To get the pgtable_t back from a pmd entry that has been installed with pmd_populate a new function pmd_pgtable is added. It replaces the pmd_page call in free_pte_range and apply_to_pte_range. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | aout: move STACK_TOP[_MAX] to asm/processor.hDavid Howells2008-02-08
|/ | | | | | | | | | Move STACK_TOP[_MAX] out of asm/a.out.h and into asm/processor.h as they're required whether or not A.OUT format is available. Signed-off-by: David Howells <dhowells@redhat.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Add cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64Mathieu Desnoyers2008-02-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add the primitives cmpxchg_local, cmpxchg64 and cmpxchg64_local to ia64. They use cmpxchg_acq as underlying macro, just like the already existing ia64 cmpxchg(). Changelog: ia64 cmpxchg_local coding style fix Quoting Keith Owens: As a matter of coding style, I prefer #define cmpxchg_local cmpxchg #define cmpxchg64_local cmpxchg64 Which makes it absolutely clear that they are the same code. With your patch, humans have to do a string compare of two defines to see if they are the same. Note cmpxchg is *not* a performance win vs interrupt disable / enable on IA64. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Acked-by: Christoph Lameter <clameter@sgi.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Keith Owens <kaos@ocs.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Sanitize the type of struct user.u_ar0H. Peter Anvin2008-02-07
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | struct user.u_ar0 is defined to contain a pointer offset on all architectures in which it is defined (all architectures which define an a.out format except SPARC.) However, it has a pointer type in the headers, which is pointless -- <asm/user.h> is not exported to userspace, and it just makes the code messy. Redefine the field as "unsigned long" (which is the same size as a pointer on all Linux architectures) and change the setting code to user offsetof() instead of hand-coded arithmetic. Cc: Linux Arch Mailing List <linux-arch@vger.kernel.org> Cc: Bryan Wu <bryan.wu@analog.com> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Lennert Buytenhek <kernel@wantstofly.org> Cc: Håvard Skinnemoen <hskinnemoen@atmel.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Tony Luck <tony.luck@intel.com> Cc: Hirokazu Takata <takata@linux-m32r.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: H. Peter Anvin <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Cleanup asm/{elf,page,user}.h: #ifdef __KERNEL__ is no longer neededKirill A. Shutemov2008-02-07
| | | | | | | | | | | | | asm/elf.h, asm/page.h and asm/user.h don't export to userspace now, so we can drop #ifdef __KERNEL__ for them. [k.shutemov@gmail.com: remove #ifdef __KERNEL_] Signed-off-by: Kirill A. Shutemov <k.shutemov@gmail.com> Reviewed-by: David Woodhouse <dwmw2@infradead.org> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Kirill A. Shutemov <k.shutemov@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge branch 'release' of ↵Linus Torvalds2008-02-05
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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] make pfm_get_task work with virtual pids [IA64] honor notify_die() returning NOTIFY_STOP [IA64] remove dead code: __cpu_{down,die} from !HOTPLUG_CPU [IA64] Appoint kvm/ia64 Maintainers [IA64] ia64_set_psr should use srlz.i [IA64] Export three symbols for module use [IA64] mca style cleanup [IA64] sn_hwperf semaphore to mutex [IA64] generalize attribute of fsyscall_gtod_data [IA64] efi.c Add /* never reached */ annotation [IA64] efi.c Spelling/punctuation fixes [IA64] Make efi.c mostly fit in 80 columns [IA64] aliasing-test: fix gcc warnings on non-ia64 [IA64] Slim-down __clear_bit_unlock [IA64] Fix the order of atomic operations in restore_previous_kprobes on ia64 [IA64] constify function pointer tables [IA64] fix userspace compile error in gcc_intrin.h
| * [IA64] ia64_set_psr should use srlz.iXiantao Zhang2008-02-04
| | | | | | | | | | | | | | | | | | The only in kernel use of ia64_set_psr() needs to follow it with a srlz.i (since it is changing state for PSR.ic). So it is pointless to issue srlz.d inside this function. Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Export three symbols for module useZhang, Xiantao2008-02-04
| | | | | | | | | | | | | | | | Since kvm/module needs to use some unexported functions in kernel, so export them with this patch. Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] mca style cleanupHidetoshi Seto2008-02-04
| | | | | | | | | | | | | | Unified changelog, 80 columns rule, and address form fix. Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] Slim-down __clear_bit_unlockZoltan Menyhart2008-02-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - I removed the unnecessary barrier() from __clear_bit_unlock(). ia64_st4_rel_nta() makes sure all the modifications are globally seen before the bit is seen to be off. - I made __clear_bit() modeled after __set_bit() and __change_bit(). - I corrected some comments sating that a memory barrier is provided, yet in reality, it is the acquisition side of the memory barrier only. - I corrected some comments, e.g. test_and_clear_bit() was peaking about "bit to set". Signed-off-by: Zoltan Menyhart, <Zoltan.Menyhart@bull.net> Acked-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] fix userspace compile error in gcc_intrin.hDoug Chapman2008-02-04
| | | | | | | | | | | | | | | | | | | | | | Fixes userspace build errors when linux/ipv6.h is included such as in the dhcpv6 package under fedora. Likely causes other userspace build errors as well. I found this in akpm's tree from 2.6.18 but could not find any case of anyone proposing it for the main tree. Signed-off-by: Doug Chapman <doug.chapman@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | add mm argument to pte/pmd/pud/pgd_freeBenjamin Herrenschmidt2008-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | (with Martin Schwidefsky <schwidefsky@de.ibm.com>) The pgd/pud/pmd/pte page table allocation functions get a mm_struct pointer as first argument. The free functions do not get the mm_struct argument. This is 1) asymmetrical and 2) to do mm related page table allocations the mm argument is needed on the free function as well. [kamalesh@linux.vnet.ibm.com: i386 fix] [akpm@linux-foundation.org: coding-syle fixes] Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | maps4: rework TASK_SIZE macrosDave Hansen2008-02-05
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following replaces the earlier patches sent. It should address David Rientjes's comments, and has been compile tested on all the architectures that it touches, save for parisc. For the /proc/<pid>/pagemap code[1], we need to able to query how much virtual address space a particular task has. The trick is that we do it through /proc and can't use TASK_SIZE since it references "current" on some arches. The process opening the /proc file might be a 32-bit process opening a 64-bit process's pagemap file. x86_64 already has a TASK_SIZE_OF() macro: #define TASK_SIZE_OF(child) ((test_tsk_thread_flag(child, TIF_IA32)) ? IA32_PAGE_OFFSET : TASK_SIZE64) I'd like to have that for other architectures. So, add it for all the architectures that actually use "current" in their TASK_SIZE. For the others, just add a quick #define in sched.h to use plain old TASK_SIZE. 1. http://www.linuxworld.com/news/2007/042407-kernel.html - MIPS portion from Ralf Baechle <ralf@linux-mips.org> [akpm@linux-foundation.org: fix mips build] Signed-off-by: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Matt Mackall <mpm@selenic.com> Acked-by: David Rientjes <rientjes@google.com> Cc: Dave Hansen <haveblue@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* asm-*/compat.h: fix typo in commentMarcin Ślusarz2008-02-03
| | | | | Signed-off-by: Marcin Ślusarz <marcin.slusarz@gmail.com> Signed-off-by: Adrian Bunk <bunk@kernel.org>
* [NET]: Introducing socket mark socket option.Laszlo Attila Toth2008-01-31
| | | | | | | | | | | | A userspace program may wish to set the mark for each packets its send without using the netfilter MARK target. Changing the mark can be used for mark based routing without netfilter or for packet filtering. It requires CAP_NET_ADMIN capability. Signed-off-by: Laszlo Attila Toth <panther@balabit.hu> Acked-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* ia64: on UP percpu variables are not small memory modelIngo Molnar2008-01-30
| | | | | | | | | | | | | | | | | | | | | | Tony says: | The CONFIG_SMP=n path in ia64 makes quite radical changes ... rather | than putting all the per-cpu stuff into the top 64K of address space | and providing a per-cpu TLB mapping for that range to a different | physical address ... it just makes all the per-cpu stuff link as ordinary | variables in .data. the new generic percpu code got confused about this as PER_CPU_ATTRIBUTES was defined even on UP, so it picked up that small memory model - which was not possible to get linked. The right fix is to only define that on SMP. This resolved the build failures in my cross-compiling environment. also link these variables into the .percpu section even on UP - some assembly code has offset dependencies. (such as GET_IA64_MCA_DATA() in arch/ia64/kernel/mca_asm.S) Signed-off-by: Ingo Molnar <mingo@elte.hu> Acked-by: Tony Luck <tony.luck@intel.com>
* ia64: use generic percputravis@sgi.com2008-01-30
| | | | | | | | | | ia64 has a special processor specific mapping that can be used to locate the offset for the current per cpu area. Cc: linux-ia64@vger.kernel.org Signed-off-by: Mike Travis <travis@sgi.com> Acked-by: Tony Luck <tony.luck@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* modules: fold percpu_modcopy into module.ctravis@sgi.com2008-01-30
| | | | | | | | percpu_modcopy() is defined multiple times in arch files. However, the only user is module.c. Put a static definition into module.c and remove the definitions from the arch files. Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: remove flush_agp_mappings()Ingo Molnar2008-01-30
| | | | | Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* percpu: move arch XX_PER_CPU_XX definitions into linux/percpu.htravis@sgi.com2008-01-30
| | | | | | | | | | | | | | | | | | | - Special consideration for IA64: Add the ability to specify arch specific per cpu flags - remove .data.percpu attribute from DEFINE_PER_CPU for non-smp case. The arch definitions are all the same. So move them into linux/percpu.h. We cannot move DECLARE_PER_CPU since some include files just include asm/percpu.h to avoid include recursion problems. Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Christoph Lameter <clameter@sgi.com> Signed-off-by: Mike Travis <travis@sgi.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* x86: voluntary leave_mm before entering ACPI C3Venki Pallipadi2008-01-30
| | | | | | | | | | | | | | | | | | | | | Aviod TLB flush IPIs during C3 states by voluntary leave_mm() before entering C3. The performance impact of TLB flush on C3 should not be significant with respect to C3 wakeup latency. Also, CPUs tend to flush TLB in hardware while in C3 anyways. On a 8 logical CPU system, running make -j2, the number of tlbflush IPIs goes down from 40 per second to ~ 0. Total number of interrupts during the run of this workload was ~1200 per second, which makes it ~3% savings in wakeups. There was no measurable performance or power impact however. [ akpm@linux-foundation.org: symbol export fixes. ] Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* remove __attribute_used__Adrian Bunk2008-01-28
| | | | | | | | | Remove the deprecated __attribute_used__. [Introduce __section in a few places to silence checkpatch /sam] Signed-off-by: Adrian Bunk <bunk@kernel.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
* [IA64] Update Altix BTE error return status patchRuss Anderson2008-01-03
| | | | | | | | | | | | | I neglected to send Tony the most recent version of the patch ("Fix Altix BTE error return status") applied as commit: 64135fa97ce016058f95345425a9ebd04ee1bd2a This patch gets it up to date. Without this patch on shub2, if there is no error xpcBteUnmappedError is returned instead of xpcSuccess. Signed-off-by: Russ Anderson (rja@sgi.com) Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] make flush_tlb_kernel_range() an inline functionJan Beulich2007-12-19
| | | | | | | | | | This fixes an unused variable warning in mm/vmalloc.c. Tony: also fix resulting fallout in uncached.c with a typo in args to flush_tlb_kernel_range(). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Fix Altix BTE error return statusRuss Anderson2007-12-19
| | | | | | | | | | | | | The Altix shub2 BTE error detail bits are in a different location than on shub1. The current code does not take this into account resulting in all shub2 BTE failures mapping to "unknown". This patch reads the error detail bits from the proper location, so the correct BTE failure reason is returned for both shub1 and shub2. Signed-off-by: Russ Anderson <rja@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Two trivial spelling fixesJoe Perches2007-12-18
| | | | | | | | s/addres/address/ s/performanc/performance/ Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* IA64: Slim down __clear_bit_unlockChristoph Lameter2007-12-18
| | | | | | | | | | | | | __clear_bit_unlock does not need to perform atomic operations on the variable. Avoid a cmpxchg and simply do a store with release semantics. Add a barrier to be safe that the compiler does not do funky things. Tony: Use intrinsic rather than inline assembler Signed-off-by: Christoph Lameter <clameter@sgi.com> Acked-by: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] iosapic cleanupSimon Horman2007-12-07
| | | | | | | Make some IOSAPIC functions static and remove one that is unused. Signed-off-by: Simon Horman <horms@verge.net.au> Signed-off-by: Tony Luck <tony.luck@intel.com>
* ACPI: Set max_cstate to 1 for early Opterons.Alexey Starikovskiy2007-11-26
| | | | | | | | | | | | | | AMD Opteron processors before CG revision don't like C-states > 1. This solves the long standing bugzilla #5303 and probably some more on affected machines: http://bugzilla.kernel.org/show_bug.cgi?id=5303 [ tglx@linutronix.de: reworked the patch so it does not wreck ia64 ] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* [IA64] Update printing of feature set bitsRuss Anderson2007-11-09
| | | | | | | | | | | Newer Itanium versions have added additional processor feature set bits. This patch prints all the implemented feature set bits. Some bit descriptions have not been made public. For those bits, a generic "Feature set X bit Y" message is printed. Bits that are not implemented will no longer be printed. Signed-off-by: Russ Anderson <rja@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] fix typo in per_cpu_offsetYu Luming2007-10-29
| | | | | | | | there is a typo in the definition of per_cpu_offset because, for ia64, the __per_cpu_offset is an array. Signed-off-by: Yu Luming <luming.yu@intel.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] /proc/cpuinfo "physical id" field cleanupsAlex Chiang2007-10-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up the process for presenting the "physical id" field in /proc/cpuinfo. - remove global smp_num_cpucores, as it is mostly useless - remove check_for_logical_procs(), since we do the same functionality in identify_siblings() - reflow logic in identify_siblings(). If an older CPU does not implement PAL_LOGICAL_TO_PHYSICAL, we may still be able to get useful information from SAL_PHYSICAL_ID_INFO - in identify_siblings(), threads/cores are a property of the CPU, not the platform - remove useless printk's about multi-core / thread capability in identify_siblings(), as that information is readily available in /proc/cpuinfo, and printing for the BSP only adds little value - smp_num_siblings is now meaningful if any CPU in the system supports threads, not just the BSP - expose "physical id" field, even on CPUs that are not multi-core / multi-threaded (as long as we have a valid value). Now we know what sockets Madisons live in too. Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* Add CONFIG_DEBUG_SG sg validationJens Axboe2007-10-22
| | | | | | | Add a Kconfig entry which will toggle some sanity checks on the sg entry and tables. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* Change table chaining layoutJens Axboe2007-10-22
| | | | | | | | | | | | | | | | | Change the page member of the scatterlist structure to be an unsigned long, and encode more stuff in the lower bits: - Bits 0 and 1 zero: this is a normal sg entry. Next sg entry is located at sg + 1. - Bit 0 set: this is a chain entry, the next real entry is at ->page_link with the two low bits masked off. - Bit 1 set: this is the final entry in the sg entry. sg_next() will return NULL when passed such an entry. It's thus important that sg table users use the proper accessors to get and set the page member. Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
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