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* Merge branch 'release' of ↵Linus Torvalds2008-07-21
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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: (25 commits) mmtimer: Push BKL down into the ioctl handler [IA64] Remove experimental status of kdump [IA64] Update ia64 mmr list for SGI uv [IA64] Avoid overflowing ia64_cpu_to_sapicid in acpi_map_lsapic() [IA64] adding parameter check to module_free() [IA64] improper printk format in acpi-cpufreq [IA64] pv_ops: move some functions in ivt.S to avoid lack of space. [IA64] pvops: documentation on ia64/pv_ops [IA64] pvops: add to hooks, pv_time_ops, for steal time accounting. [IA64] pvops: add hooks, pv_irq_ops, to paravirtualized irq related operations. [IA64] pvops: add hooks, pv_iosapic_ops, to paravirtualize iosapic. [IA64] pvops: define initialization hooks, pv_init_ops, for paravirtualized environment. [IA64] pvops: paravirtualize NR_IRQS [IA64] pvops: paravirtualize entry.S [IA64] pvops: paravirtualize ivt.S [IA64] pvops: paravirtualize minstate.h. [IA64] pvops: define paravirtualized instructions for native. [IA64] pvops: preparation for paravirtulization of hand written assembly code. [IA64] pvops: introduce pv_cpu_ops to paravirtualize privileged instructions. [IA64] pvops: add an early setup hook for pv_ops. ...
| * [IA64] Update ia64 mmr list for SGI uvDimitri Sivanich2008-07-17
| | | | | | | | | | | | | | This patch updates the ia64 mmr list for SGI uv. Signed-off-by: Dimitri Sivanich <sivanich@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * Pull pvops into release branchTony Luck2008-07-17
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| | * [IA64] pvops: add to hooks, pv_time_ops, for steal time accounting.Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce pv_time_ops which adds hook to steal time accounting. On virtualized environment, cpus are shared by many guests and steal time is the time which is used for other guests. On virtualized environtment, streal time should be accounted. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: add hooks, pv_irq_ops, to paravirtualized irq related operations.Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | introduce pv_irq_ops which adds hooks to paravirtualize irq related operations. On virtualized environment, interruption may be replaced by something virtualization friendly. So the irq related operation also may need paravirtualization. This patch adds necessary hooks to paravirtualize irq related operations. Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: add hooks, pv_iosapic_ops, to paravirtualize iosapic.Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | add hooks to paravirtualize iosapic which is a real hardware resource. On virtualized environment it may be replaced something virtualized friendly. Define pv_iosapic_ops and add the hooks. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: define initialization hooks, pv_init_ops, for paravirtualized ↵Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | environment. define pv_init_ops hooks which represents various initialization hooks for paravirtualized environment. and add hooks. Signed-off-by: Alex Williamson <alex.williamson@hp.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: paravirtualize NR_IRQSIsaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make NR_IRQ overridable by each pv instances. Pv instance may need each own number of irqs so that NR_IRQS should be the maximum number of nr_irqs each pv instances need. Cc: Jes Sorensen <jes@sgi.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: paravirtualize entry.SIsaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | paravirtualize ia64_swtich_to, ia64_leave_syscall and ia64_leave_kernel. They include sensitive or performance critical privileged instructions so that they need paravirtualization. To paravirtualize them by single source and multi compile they are converted into indirect jump. And define each pv instances. Cc: Keith Owens <kaos@ocs.com.au> Cc: "Dong, Eddie" <eddie.dong@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: paravirtualize minstate.h.Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | paravirtualize minstate.h which are hand written assembly code. They include sensitive or performance critical privileged instructions. So that they are appropriate for paravirtualization. Cc: Keith Owens <kaos@ocs.com.au> Cc: Akio Takebe <takebe_akio@jp.fujitsu.com> Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: define paravirtualized instructions for native.Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pv_cpu_asm_ops: define paravirtualized introduce for native execution environment. Cc: Keith Owens <kaos@ocs.com.au> Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: introduce pv_cpu_ops to paravirtualize privileged instructions.Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | introduce pv_cpu_ops to paravirtualize privleged instructions which are defined by ia64 intrinsics. make them indirect C function calls by introducing function tables, pv_cpu_ops. Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: add an early setup hook for pv_ops.Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds a setup hook in the very early boot sequence before start_kernel() to initialize paravirtualization stuff. The hook will be set by each pv loader code or by using multi entry point. Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: introduce pv_info which describes some random info.Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | introduce pv_info which describes some randome info about underlying execution environment. Cc: Jes Sorensen <jes@sgi.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: preparation: introduce ia64_get_psr_i() to make kernel ↵Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | paravirtualization friendly. __local_irq_save() and local_save_flags() are used to mask interruptions. They read all psr bits that requres whole bit emulation. On the other hand, reading only psr.i, the single bit, can be virtualized cheaply. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: preparation: introduce ia64_set_rr0_to_rr4() to make kernel ↵Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | paravirtualization friendly. make kernel paravirtualization friendly by introducing ia64_set_rr0_to_rr4(). ia64/Xen will replace setting rr[0-4] with single hypercall later. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: preparation: move the constants, LOAD_OFFSET, to a header file.Isaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Move the LOAD_OFFSET definition from vmlinux.lds.S into system.h. On paravirtualized environments, it is necessary to detect the execution environment. One of the solutions is the multi entry point. The multi entry point allows a boot loader to start the kernel execution from the entry point which is different from the ELF entry point. The non standard entry point will defined as the specialized elf note which contains the LMA of the entry point symbol. The constant, LOAD_OFFSET, is necessary to calculate the symbol's LMA. Move the definition into the public header file to make it available to the multi entry point support. Cc: "He, Qing" <qing.he@intel.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
| | * [IA64] pvops: preparation: remove extern in irq_ia64.cIsaku Yamahata2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | remove extern declaration of handle_IPI() in irq_ia64.c. Instead, declare it in asm-ia64/smp.h. Later handle_IPI() will be referenced from another file. Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | KVM: Add coalesced MMIO support (ia64 part)Laurent Vivier2008-07-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch enables coalesced MMIO for ia64 architecture. It defines KVM_MMIO_PAGE_OFFSET and KVM_CAP_COALESCED_MMIO. It enables the compilation of coalesced_mmio.c. [akpm: fix compile error on ia64] Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Avi Kivity <avi@qumranet.com>
* | | KVM: IOAPIC/LAPIC: Enable NMI supportSheng Yang2008-07-20
|/ / | | | | | | | | | | | | [avi: fix ia64 build breakage] Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* | ACPI : Create "idle=nomwait" bootparamZhao Yakui2008-07-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | "idle=nomwait" disables the use of the MWAIT instruction from both C1 (C1_FFH) and deeper (C2C3_FFH) C-states. When MWAIT is unavailable, the BIOS and OS generally negotiate to use the HALT instruction for C1, and use IO accesses for deeper C-states. This option is useful for power and performance comparisons, and also to work around BIOS bugs where broken MWAIT support is advertised. http://bugzilla.kernel.org/show_bug.cgi?id=10807 http://bugzilla.kernel.org/show_bug.cgi?id=10914 Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Li Shaohua <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
* | ACPI: Create "idle=halt" bootparamZhao Yakui2008-07-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | "idle=halt" limits the idle loop to using the halt instruction. No MWAIT, no IO accesses, no C-states deeper than C1. If something is broken in the idle code, "idle=halt" is a less severe workaround than "idle=poll" which disables all power savings. Signed-off-by: Zhao Yakui <yakui.zhao@intel.com> Signed-off-by: Len Brown <len.brown@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
* | ia64: convert to generic helpers for IPI function callsJens Axboe2008-06-26
| | | | | | | | | | | | | | | | This converts ia64 to use the new helpers for smp_call_function() and friends, and adds support for smp_call_function_single(). Cc: Tony Luck <tony.luck@intel.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | [IA64] Fix CONFIG_IA64_SGI_UV build errorJack Steiner2008-06-16
|/ | | | | | | | Fix build error in CONFIG_IA64_SGI_UV config. (GENERIC builds are ok). Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Workaround for RSE issueTony Luck2008-05-27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Problem: An application violating the architectural rules regarding operation dependencies and having specific Register Stack Engine (RSE) state at the time of the violation, may result in an illegal operation fault and invalid RSE state. Such faults may initiate a cascade of repeated illegal operation faults within OS interruption handlers. The specific behavior is OS dependent. Implication: An application causing an illegal operation fault with specific RSE state may result in a series of illegal operation faults and an eventual OS stack overflow condition. Workaround: OS interruption handlers that switch to kernel backing store implement a check for invalid RSE state to avoid the series of illegal operation faults. The core of the workaround is the RSE_WORKAROUND code sequence inserted into each invocation of the SAVE_MIN_WITH_COVER and SAVE_MIN_WITH_COVER_R19 macros. This sequence includes hard-coded constants that depend on the number of stacked physical registers being 96. The rest of this patch consists of code to disable this workaround should this not be the case (with the presumption that if a future Itanium processor increases the number of registers, it would also remove the need for this patch). Move the start of the RBS up to a mod32 boundary to avoid some corner cases. The dispatch_illegal_op_fault code outgrew the spot it was squatting in when built with this patch and CONFIG_VIRT_CPU_ACCOUNTING=y Move it out to the end of the ivt. Signed-off-by: Tony Luck <tony.luck@intel.com>
* KVM: ia64: Set KVM_IOAPIC_NUM_PINS to 48Xiantao Zhang2008-05-18
| | | | | | | | Guest's firmware needs an iosapic with 48 pins for ia64 guests. Needed to get networking going. Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ia64: Define new kvm_fpreg struture to replace ia64_fpregXiantao Zhang2008-05-18
| | | | | | | | The kernel's ia64_fpreg structure conflicts with userspace headers, so define a new structure to replace it. Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* [IA64] machvec support for SGI UV platformJack Steiner2008-05-14
| | | | | | | | This patch adds the basic IA64 machvec infrastructure to support the SGI "UV" platform. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] Add header files for SGI UV platformJack Steiner2008-05-14
| | | | | | | Add new UV-specific header files. Signed-off-by: Jack Steiner <steiner@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* ia64: types: use <asm-generic/int-*.h> for the ia64 architectureH. Peter Anvin2008-05-02
| | | | | | | | This modifies <asm-ia64/types.h> to use the <asm-generic/int-*.h> generic include files. Signed-off-by: H. Peter Anvin <hpa@zytor.com> Acked-by: Tony Luck <tony.luck@intel.com>
* Merge branch 'release' of ↵Linus Torvalds2008-05-02
|\ | | | | | | | | | | | | | | | | | | | | | | | | 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 file and descriptor handling in perfmon [IA64] TS_RESTORE_SIGMASK [IA64] smp.c coding style fix [IA64] fix section mismatch in arch/ia64/kernel/topology.c [IA64] fix section mismatch in arch/ia64/kernel/palinfo.c [IA64] fix section mismatch in arch/ia64/kernel/irq.c [IA64] fix section mismatch in arch/ia64/kernel/acpi.c
| * [IA64] TS_RESTORE_SIGMASKRoland McGrath2008-05-01
| | | | | | | | | | | | | | | | | | | | Replace TIF_RESTORE_SIGMASK with TS_RESTORE_SIGMASK and define our own set_restore_sigmask() function. This saves the costly SMP-safe set_bit operation, which we do not need for the sigmask flag since TIF_SIGPENDING always has to be set too. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
| * [IA64] fix section mismatch in arch/ia64/kernel/topology.cHidetoshi Seto2008-04-30
| | | | | | | | | | | | | | | | | | | | | | | | | | This patch silences: WARNING: vmlinux.o(.text+0x44672): Section mismatch in reference from the function arch_register_cpu() to the function .cpuinit.text:register_cpu() Changes are based on codes in arch/x86/kernel/topology.c Signed-off-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* | dmi: clean-up dmi helper declarationsJean Delvare2008-05-01
|/ | | | | | | | | | | | | | | | | The declaration of dmi helper functions is a bit messy and inconsistent at the moment: * On ia64 they are declared in <asm/io.h>. * On x86-64 they are declared in <asm/dmi.h>. * On i386 they are declared both in <asm/io.h> and <asm/dmi.h>. Fix the header files so that the dmi helper functions are consistently defined in <asm/dmi.h>. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Matt Domsch <Matt_Domsch@dell.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* asm-*/futex.h should include linux/uaccess.hJeff Dike2008-04-30
| | | | | | | | | | | | | | | | | | | | | Lots of asm-*/futex.h call pagefault_enable and pagefault_disable, which are declared in linux/uaccess.h, without including linux/uaccess.h. They all include asm/uaccess.h, so this patch replaces asm/uaccess.h with linux/uaccess.h. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* signals: ia64 renumber TIF_RESTORE_SIGMASKakpm@linux-foundation.org2008-04-30
| | | | | | | | | | | | | | | TIF_RESTORE_SIGMASK no longer needs to be in the _TIF_WORK_* masks. Those low bits are scarce. Renumber TIF_RESTORE_SIGMASK to free one up. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.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] Provide ACPI fixup for /proc/cpuinfo/physical_idAlex Chiang2008-04-29
| | | | | | | | | | | | | | | | | | | | | | Legacy HP ia64 platforms currently cannot provide /proc/cpuinfo/physical_id due to legacy SAL/PAL implementations. However, that physical topology information can be obtained via ACPI. Provide an interface that gives ACPI one last chance to provide physical_id for these legacy platforms. This logic only comes into play iff: - ACPI actually provides slot information for the CPU - we lack a valid socket_id Otherwise, we don't do anything. Since x86 uses the ACPI processor driver as well, we provide a nop stub function for arch_fix_phys_package_id() in asm-x86/topology.h Signed-off-by: Alex Chiang <achiang@hp.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* [IA64] allocate multiple contiguous pages via uncached allocatorDean Nelson2008-04-29
| | | | | | | | Enable the uncached allocator to allocate multiple pages of contiguous uncached memory. Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
* kernel: Move arches to use common unaligned accessHarvey Harrison2008-04-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | Unaligned access is ok for the following arches: cris, m68k, mn10300, powerpc, s390, x86 Arches that use the memmove implementation for native endian, and the byteshifting for the opposite endianness. h8300, m32r, xtensa Packed struct for native endian, byteshifting for other endian: alpha, blackfin, ia64, parisc, sparc, sparc64, mips, sh m86knommu is generic_be for Coldfire, otherwise unaligned access is ok. frv, arm chooses endianness based on compiler settings, uses the byteshifting versions. Remove the unaligned trap handler from frv as it is now unused. v850 is le, uses the byteshifting versions for both be and le. Remove the now unused asm-generic implementation. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Acked-by: David S. Miller <davem@davemloft.net> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dma/ia64: update ia64 machvecs, swiotlb.cArthur Kepner2008-04-29
| | | | | | | | | | | | | | | | | | | | | Change all ia64 machvecs to use the new dma_*map*_attrs() interfaces. Implement the old dma_*map_*() interfaces in terms of the corresponding new interfaces. For ia64/sn, make use of one dma attribute, DMA_ATTR_WRITE_BARRIER. Introduce swiotlb_*map*_attrs() functions. Signed-off-by: Arthur Kepner <akepner@sgi.com> Cc: Tony Luck <tony.luck@intel.com> Cc: Jesse Barnes <jbarnes@virtuousgeek.org> Cc: Jes Sorensen <jes@sgi.com> Cc: Randy Dunlap <randy.dunlap@oracle.com> Cc: Roland Dreier <rdreier@cisco.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: David Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Grant Grundler <grundler@parisc-linux.org> Cc: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* fix ia64 local_irq_save() et.al.Al Viro2008-04-28
| | | | | | | | | psr is not a good name for local variable in macro body when it has a good chance of being the argument of said macro (actually is at least in one place) Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hugetlbfs: common code update for s390Gerald Schaefer2008-04-28
| | | | | | | | | | | | | | | | | | | | Huge ptes have a special type on s390 and cannot be handled with the standard pte functions in certain cases, e.g. because of a different location of the invalid bit. This patch adds some new architecture- specific functions to hugetlb common code, as a prerequisite for the s390 large page support. This won't affect other architectures in functionality, but I need to add some new dummy inline functions to the headers. Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hugetlbfs: add missing TLB flush to hugetlb_cow()Gerald Schaefer2008-04-28
| | | | | | | | | | | | | | | | | | | | | | | A cow break on a hugetlbfs page with page_count > 1 will set a new pte with set_huge_pte_at(), w/o any tlb flush operation. The old pte will remain in the tlb and subsequent write access to the page will result in a page fault loop, for as long as it may take until the tlb is flushed from somewhere else. This patch introduces an architecture-specific huge_ptep_clear_flush() function, which is called before the the set_huge_pte_at() in hugetlb_cow(). ATTENTION: This is just a nop on all architectures for now, the s390 implementation will come with our large page patch later. Other architectures should define their own huge_ptep_clear_flush() if needed. Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hugetlbfs: architecture header cleanupGerald Schaefer2008-04-28
| | | | | | | | | | | | | | | | | | | | | | | This patch moves all architecture functions for hugetlb to architecture header files (include/asm-foo/hugetlb.h) and converts all macros to inline functions. It also removes (!) ARCH_HAS_HUGEPAGE_ONLY_RANGE, ARCH_HAS_HUGETLB_FREE_PGD_RANGE, ARCH_HAS_PREPARE_HUGEPAGE_RANGE, ARCH_HAS_SETCLEAR_HUGE_PTE and ARCH_HAS_HUGETLB_PREFAULT_HOOK. Getting rid of the ARCH_HAS_xxx #ifdef and macro fugliness should increase readability and maintainability, at the price of some code duplication. An asm-generic common part would have reduced the loc, but we would end up with new ARCH_HAS_xxx defines eventually. Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* mm: introduce pte_special pte bitNick Piggin2008-04-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | s390 for one, cannot implement VM_MIXEDMAP with pfn_valid, due to their memory model (which is more dynamic than most). Instead, they had proposed to implement it with an additional path through vm_normal_page(), using a bit in the pte to determine whether or not the page should be refcounted: vm_normal_page() { ... if (unlikely(vma->vm_flags & (VM_PFNMAP|VM_MIXEDMAP))) { if (vma->vm_flags & VM_MIXEDMAP) { #ifdef s390 if (!mixedmap_refcount_pte(pte)) return NULL; #else if (!pfn_valid(pfn)) return NULL; #endif goto out; } ... } This is fine, however if we are allowed to use a bit in the pte to determine refcountedness, we can use that to _completely_ replace all the vma based schemes. So instead of adding more cases to the already complex vma-based scheme, we can have a clearly seperate and simple pte-based scheme (and get slightly better code generation in the process): vm_normal_page() { #ifdef s390 if (!mixedmap_refcount_pte(pte)) return NULL; return pte_page(pte); #else ... #endif } And finally, we may rather make this concept usable by any architecture rather than making it s390 only, so implement a new type of pte state for this. Unfortunately the old vma based code must stay, because some architectures may not be able to spare pte bits. This makes vm_normal_page a little bit more ugly than we would like, but the 2 cases are clearly seperate. So introduce a pte_special pte state, and use it in mm/memory.c. It is currently a noop for all architectures, so this doesn't actually result in any compiled code changes to mm/memory.o. BTW: I haven't put vm_normal_page() into arch code as-per an earlier suggestion. The reason is that, regardless of where vm_normal_page is actually implemented, the *abstraction* is still exactly the same. Also, while it depends on whether the architecture has pte_special or not, that is the only two possible cases, and it really isn't an arch specific function -- the role of the arch code should be to provide primitive functions and accessors with which to build the core code; pte_special does that. We do not want architectures to know or care about vm_normal_page itself, and we definitely don't want them being able to invent something new there out of sight of mm/ code. If we made vm_normal_page an arch function, then we have to make vm_insert_mixed (next patch) an arch function too. So I don't think moving it to arch code fundamentally improves any abstractions, while it does practically make the code more difficult to follow, for both mm and arch developers, and easier to misuse. [akpm@linux-foundation.org: build fix] Signed-off-by: Nick Piggin <npiggin@suse.de> Acked-by: Carsten Otte <cotte@de.ibm.com> Cc: Jared Hulbert <jaredeh@gmail.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* KVM: Rename VCPU_MP_STATE_* to KVM_MP_STATE_*Avi Kivity2008-04-27
| | | | | | We wish to export it to userspace, so move it into the kvm namespace. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ia64: Add header files for kvm/ia64Xiantao Zhang2008-04-27
| | | | | | | | | | Three header files are added: asm-ia64/kvm.h asm-ia64/kvm_host.h asm-ia64/kvm_para.h Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: ia64: Prepare some structure and routines for kvm useXiantao Zhang2008-04-27
| | | | | | | | | Register structures are defined per SDM. Add three small routines for kernel: ia64_ttag, ia64_loadrs, ia64_flushrs Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* generic: implement __fls on all 64-bit archsAlexander van Heukelum2008-04-26
| | | | | | | | | | | | | | | | | | | | | Implement __fls on all 64-bit archs: alpha has an implementation of fls64. Added __fls(x) = fls64(x) - 1. ia64 has fls, but not __fls. Added __fls based on code of fls. mips and powerpc have __ilog2, which is the same as __fls. Added __fls = __ilog2. parisc, s390, sh and sparc64: Include generic __fls. x86_64 already has __fls. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
* [IA64] move XP and XPC to drivers/misc/sgi-xpDean Nelson2008-04-22
| | | | | | | Move XPC and XPNET from arch/ia64/sn/kernel to drivers/misc/sgi-xp. Signed-off-by: Dean Nelson <dcn@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-21 11:28:40 -0500