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* Merge branch 'for-linus/xen/core' into for-linus/xen/masterJeremy Fitzhardinge2009-04-07
|\ | | | | | | | | * for-linus/xen/core: xen: honour VCPU availability on boot
| * xen: honour VCPU availability on bootIan Campbell2009-04-02
| | | | | | | | | | | | | | | | | | If a VM is booted with offline VCPUs then unplug them during boot. Determining the availability of a VCPU requires access to XenStore which is not available at the point smp_prepare_cpus() is called, therefore we bring up all VCPUS initially and unplug the offline ones as soon as XenStore becomes available. Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
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*-----. \ Merge branches 'for-linus/xen/dev-evtchn', 'for-linus/xen/xenbus', ↵Jeremy Fitzhardinge2009-03-30
|\ \ \ \ \ | |_|_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 'for-linus/xen/xenfs' and 'for-linus/xen/sys-hypervisor' into for-linus/xen/master * for-linus/xen/dev-evtchn: xen/dev-evtchn: clean up locking in evtchn xen: export ioctl headers to userspace xen: add /dev/xen/evtchn driver xen: add irq_from_evtchn * for-linus/xen/xenbus: xen/xenbus: export xenbus_dev_changed xen: use device model for suspending xenbus devices xen: remove suspend_cancel hook * for-linus/xen/xenfs: xen: add "capabilities" file * for-linus/xen/sys-hypervisor: xen: drop kexec bits from /sys/hypervisor since kexec isn't implemented yet xen/sys/hypervisor: change writable_pt to features xen: add /sys/hypervisor support Conflicts: drivers/xen/Makefile
| | | | * xen: drop kexec bits from /sys/hypervisor since kexec isn't implemented yetIan Campbell2009-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I needed this to compile since there is no kexec yet in pvops kernel CC drivers/xen/sys-hypervisor.o drivers/xen/sys-hypervisor.c: In function 'hyper_sysfs_init': drivers/xen/sys-hypervisor.c:405: error: 'vmcoreinfo_size_xen' undeclared (first use in this function) drivers/xen/sys-hypervisor.c:405: error: (Each undeclared identifier is reported only once drivers/xen/sys-hypervisor.c:405: error: for each function it appears in.) drivers/xen/sys-hypervisor.c:406: error: implicit declaration of function 'xen_sysfs_vmcoreinfo_init' drivers/xen/sys-hypervisor.c: In function 'hyper_sysfs_exit': drivers/xen/sys-hypervisor.c:433: error: 'vmcoreinfo_size_xen' undeclared (first use in this function) drivers/xen/sys-hypervisor.c:434: error: implicit declaration of function 'xen_sysfs_vmcoreinfo_destroy' Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
| | | | * xen/sys/hypervisor: change writable_pt to featuresJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | /sys/hypervisor/properties/writable_pt was misnamed. Rename to features, expressed as a bit array in hex. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| | | | * xen: add /sys/hypervisor supportJeremy Fitzhardinge2009-03-30
| |_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | Adds support for Xen info under /sys/hypervisor. Taken from Novell 2.6.27 backport tree. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| | | * xen: add "capabilities" fileJeremy Fitzhardinge2009-03-30
| |_|/ |/| | | | | | | | | | | | | | | | | | | | The xenfs capabilities file allows usermode to determine what capabilities the domain has. The only one at present is "control_d" in a privileged domain. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| | * xen/xenbus: export xenbus_dev_changedJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | | Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| | * xen: use device model for suspending xenbus devicesIan Campbell2009-03-30
| | | | | | | | | | | | | | | Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| | * xen: remove suspend_cancel hookIan Campbell2009-03-30
| |/ |/| | | | | | | | | | | | | Remove suspend_cancel hook from xenbus_driver, in preparation for using the device model for suspending. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen/dev-evtchn: clean up locking in evtchnJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | | | | | | Define a new per_user_data mutex to serialize bind/unbind operations to prevent them from racing with each other. Fix error returns and don't do a bind while holding a spinlock. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen: export ioctl headers to userspaceIan Campbell2009-03-30
| | | | | | | | | | Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen: add /dev/xen/evtchn driverIan Campbell2009-03-30
| | | | | | | | | | | | | | | | | | | | This driver is used by application which wish to receive notifications from the hypervisor or other guests via Xen's event channel mechanism. In particular it is used by the xenstore daemon in domain 0. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
| * xen: add irq_from_evtchnIan Campbell2009-03-30
|/ | | | | | | Given an evtchn, return the corresponding irq. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: clean up gate trap/interrupt constantsJeremy Fitzhardinge2009-03-30
| | | | | | Use GATE_INTERRUPT/TRAP rather than 0xe/f. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: set _PAGE_NX in __supported_pte_mask before pagetable constructionJeremy Fitzhardinge2009-03-30
| | | | | | | Some 64-bit machines don't support the NX flag in ptes. Check for NX before constructing the kernel pagetables. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: resume interrupts before system devices.Ian Campbell2009-03-30
| | | | | | | | | | Impact: bugfix Xen domain restore Otherwise the first timer interrupt after resume is missed and we never get another. Signed-off-by: Ian Campbell <ian.campbell@citrix.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen/mmu: weaken flush_tlb_other testJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | Impact: fixes crashing bug There's no particular problem with getting an empty cpu mask, so just shortcut-return if we get one. Avoids crash reported by Christophe Saout <christophe@saout.de> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen/mmu: some early pagetable cleanupsJeremy Fitzhardinge2009-03-30
| | | | | | | | | 1. make sure early-allocated ptes are pinned, so they can be later unpinned 2. don't pin pmd+pud, just make them RO 3. scatter some __inits around Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86-64: non-paravirt systems always has PSE and PGEJeremy Fitzhardinge2009-03-30
| | | | | | | | | A paravirtualized system may not have PSE or PGE available to guests, so they are not required features. However, without paravirt we can assume that any x86-64 implementation will have them available. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* Xen: Add virt_to_pfn helper functionAlex Nixon2009-03-30
| | | | Signed-off-by: Alex Nixon <alex.nixon@citrix.com>
* x86-64: remove PGE from must-have feature listJeremy Fitzhardinge2009-03-30
| | | | | | | PGE may not be available when running paravirtualized, so test the cpuid bit before using it. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: mask XSAVE from cpuidJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | | | | Xen leaves XSAVE set in cpuid, but doesn't allow cr4.OSXSAVE to be set. This confuses the kernel and it ends up crashing on an xsetbv instruction. At boot time, try to set cr4.OSXSAVE, and mask XSAVE out of cpuid it we can't. This will produce a spurious error from Xen, but allows us to support XSAVE if/when Xen does. This also factors out the cpuid mask decisions to boot time. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* NULL noise: arch/x86/xen/smp.cHannes Eder2009-03-30
| | | | | | | | | Fix this sparse warnings: arch/x86/xen/smp.c:316:52: warning: Using plain integer as NULL pointer arch/x86/xen/smp.c:421:60: warning: Using plain integer as NULL pointer Signed-off-by: Hannes Eder <hannes@hanneseder.net> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: remove xen_load_gdt debugJeremy Fitzhardinge2009-03-30
| | | | | | Don't need the noise. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: make xen_load_gdt simplerJeremy Fitzhardinge2009-03-30
| | | | | | | | | Remove use of multicall machinery which is unused (gdt loading is never performance critical). This removes the implicit use of percpu variables, which simplifies understanding how the percpu code's use of load_gdt interacts with this code. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: clean up xen_load_gdtJeremy Fitzhardinge2009-03-30
| | | | | | Makes the logic a bit clearer. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: split construction of p2m mfn tables from registrationJeremy Fitzhardinge2009-03-30
| | | | | | | Build the p2m_mfn_list_list early with the rest of the p2m table, but register it later when the real shared_info structure is in place. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: separate p2m allocation from settingJeremy Fitzhardinge2009-03-30
| | | | | | | When doing very early p2m setting, we need to separate setting from allocation, so split things up accordingly. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* xen: disable preempt for leave_lazy_mmuJeremy Fitzhardinge2009-03-30
| | | | | | | xen_mc_flush() requires preemption to be disabled for its own sanity, so disable it while we're flushing. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* x86/paravirt: use percpu_ rather than __get_cpu_varJeremy Fitzhardinge2009-03-30
| | | | | | | | | Impact: minor optimisation percpu_read/write is a slightly more direct way of getting to percpu data. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* mm: allow preemption in apply_to_pte_rangeJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | | Impact: allow preemption in apply_to_pte_range updates to init_mm Preemption is now allowed for lazy mmu mode, so don't disable it for the inner loop of apply_to_pte_range. This only applies when doing updates to init_mm; user pagetables are still modified under the pte lock, so preemption is disabled anyway. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
* x86/paravirt: allow preemption with lazy mmu modeJeremy Fitzhardinge2009-03-30
| | | | | | | | | Impact: remove obsolete checks, simplification Lift restrictions on preemption with lazy mmu mode, as it is now allowed. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
* x86/paravirt: finish change from lazy cpu to context switch start/endJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | | Impact: fix lazy context switch API Pass the previous and next tasks into the context switch start end calls, so that the called functions can properly access the task state (esp in end_context_switch, in which the next task is not yet completely current). Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
* x86/paravirt: flush pending mmu updates on context switchJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | | | | | Impact: allow preemption during lazy mmu updates If we're in lazy mmu mode when context switching, leave lazy mmu mode, but remember the task's state in TIF_LAZY_MMU_UPDATES. When we resume the task, check this flag and re-enter lazy mmu mode if its set. This sets things up for allowing lazy mmu mode while preemptible, though that won't actually be active until the next change. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
* x86/pvops: replace arch_enter_lazy_cpu_mode with arch_start_context_switchJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | Impact: simplification, prepare for later changes Make lazy cpu mode more specific to context switching, so that it makes sense to do more context-switch specific things in the callbacks. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
* x86/paravirt: remove lazy mode in interruptsJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | | | | Impact: simplification, robustness Make paravirt_lazy_mode() always return PARAVIRT_LAZY_NONE when in an interrupt. This prevents interrupt code from accidentally inheriting an outer lazy state, and instead does everything synchronously. Outer batched operations are left deferred. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de>
* mm: disable preemption in apply_to_pte_rangeJeremy Fitzhardinge2009-03-30
| | | | | | | | | | | Impact: bugfix Lazy mmu mode needs preemption disabled, so if we're apply to init_mm (which doesn't require any pte locks), then explicitly disable preemption. (Do it unconditionally after checking we've successfully done the allocation to simplify the error handling.) Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
* Merge branch 'bzip2-lzma-for-linus' of ↵Linus Torvalds2009-03-29
|\ | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip * 'bzip2-lzma-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-tip: bzip2/lzma: don't ask for compression mode for the default initramfs bzip2/lzma: consistently capitalize LZMA in Kconfig bzip2/lzma: clarify the meaning of the CONFIG_RD_ options bzip2/lzma: move CONFIG_RD_* options under CONFIG_EMBEDDED
| * bzip2/lzma: don't ask for compression mode for the default initramfsH. Peter Anvin2009-03-28
| | | | | | | | | | | | | | | | | | | | | | | | | | Impact: Kconfig noise reduction, documentation The default initramfs is so small that it makes no sense to worry about the additional memory taken by not double-compressing it. Therefore, don't bug the user with it. Also, improve the description of the option, which was downright incorrect. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * bzip2/lzma: consistently capitalize LZMA in KconfigH. Peter Anvin2009-03-28
| | | | | | | | | | | | | | | | | | Impact: message formatting Consistently spell LZMA in all capitals, since it (unlike gzip or bzip2) is an acronym. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * bzip2/lzma: clarify the meaning of the CONFIG_RD_ optionsH. Peter Anvin2009-03-28
| | | | | | | | | | | | | | | | | | Impact: Kconfig clarification Make it clear that the CONFIG_RD_* options are about what formats are supported, not about what formats are actually being used. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * bzip2/lzma: move CONFIG_RD_* options under CONFIG_EMBEDDEDH. Peter Anvin2009-03-28
| | | | | | | | | | | | | | | | | | | | | | Impact: reduce Kconfig noise Move the options that control possible initramfs/initrd compressions underneath CONFIG_EMBEDDED. The only impact of leaving these options set to y is additional code in the init section of the kernel; there is no reason to burden non-embedded users with these options. Signed-off-by: H. Peter Anvin <hpa@zytor.com>
| * Merge commit 'v2.6.29' into x86/setup-lzmaIngo Molnar2009-03-26
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* | | Fix build error in <linux/irq.h>Ralf Baechle2009-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | <linux/irq.h> relies on <linux/gfp.h> and <linux/topology.h> having been included previous. If not, the errors like below will result. CC arch/mips/mti-malta/malta-int.o In file included from arch/mips/mti-malta/malta-int.c:25: include/linux/irq.h: In function ‘init_alloc_desc_masks’: include/linux/irq.h:444: error: implicit declaration of function ‘cpu_to_node’ include/linux/irq.h:446: error: ‘GFP_ATOMIC’ undeclared (first use in this function) include/linux/irq.h:446: error: (Each undeclared identifier is reported only once include/linux/irq.h:446: error: for each function it appears in.) make[3]: *** [arch/mips/mti-malta/malta-int.o] Error 1 make[2]: *** [arch/mips/mti-malta] Error 2 make[1]: *** [sub-make] Error 2 Fixed by including the two missing headers. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | sched: fix errors in struct & function commentsRandy Dunlap2009-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix kernel-doc errors in sched.c: the structs don't have kernel-doc notation and the short function description needs to be one line only. Error(kernel/sched.c:3197): cannot understand prototype: 'struct sd_lb_stats ' Error(kernel/sched.c:3228): cannot understand prototype: 'struct sg_lb_stats ' Error(kernel/sched.c:3375): duplicate section name 'Description' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | maple: fix Error in kernel-doc notationRandy Dunlap2009-03-29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix kernel-doc error in maple (it's not kernel-doc): Error(drivers/sh/maple/maple.c:782): cannot understand prototype: 'struct bus_type maple_bus_type = ' Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'futexes-for-linus' of ↵Linus Torvalds2009-03-28
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'futexes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: futex: remove the pointer math from double_unlock_hb, fix futex: remove the pointer math from double_unlock_hb futex: clean up fault logic futex: unlock before returning -EFAULT futex: use current->time_slack_ns for rt tasks too futex: add double_unlock_hb() futex: additional (get|put)_futex_key() fixes futex: update futex commentary
| * \ \ Merge branch 'linus' into core/futexesIngo Molnar2009-03-28
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| * | | | futex: remove the pointer math from double_unlock_hb, fixIngo Molnar2009-03-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Impact: fix double unlock crash Thomas Gleixner noticed that the simplified double_unlock_hb() became ... too unsophisticated: in the hb1 == hb2 case it will do a double unlock. Reported-by: Thomas Gleixner <tglx@linutronix.de> Cc: Darren Hart <dvhltc@us.ibm.com> LKML-Reference: <20090312221118.11146.68610.stgit@Aeon> Signed-off-by: Ingo Molnar <mingo@elte.hu>
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