09 Jan, 2009
2 commits
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The xenfs filesystem exports various interfaces to usermode. Initially
this exports a file to allow usermode to interact with xenbus/xenstore.Traditionally this appeared in /proc/xen. Rather than extending procfs,
this patch adds a backward-compat mountpoint on /proc/xen, and provides
a xenfs filesystem which can be mounted there.Signed-off-by: Alex Zeffertt
Signed-off-by: Jeremy Fitzhardinge
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
no argument named @xbt in xenbus_switch_state(), remove it.
Signed-off-by: Qinghuang Feng
Cc: Randy Dunlap
Cc: Jeremy Fitzhardinge
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
07 Jan, 2009
1 commit
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CC: Jeremy Fitzhardinge
Signed-off-by: Kay Sievers
Signed-off-by: Greg Kroah-Hartman
03 Jan, 2009
1 commit
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…/git/tip/linux-2.6-tip
* 'cpus4096-for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (66 commits)
x86: export vector_used_by_percpu_irq
x86: use logical apicid in x2apic_cluster's x2apic_cpu_mask_to_apicid_and()
sched: nominate preferred wakeup cpu, fix
x86: fix lguest used_vectors breakage, -v2
x86: fix warning in arch/x86/kernel/io_apic.c
sched: fix warning in kernel/sched.c
sched: move test_sd_parent() to an SMP section of sched.h
sched: add SD_BALANCE_NEWIDLE at MC and CPU level for sched_mc>0
sched: activate active load balancing in new idle cpus
sched: bias task wakeups to preferred semi-idle packages
sched: nominate preferred wakeup cpu
sched: favour lower logical cpu number for sched_mc balance
sched: framework for sched_mc/smt_power_savings=N
sched: convert BALANCE_FOR_xx_POWER to inline functions
x86: use possible_cpus=NUM to extend the possible cpus allowed
x86: fix cpu_mask_to_apicid_and to include cpu_online_mask
x86: update io_apic.c to the new cpumask code
x86: Introduce topology_core_cpumask()/topology_thread_cpumask()
x86: xen: use smp_call_function_many()
x86: use work_on_cpu in x86/kernel/cpu/mcheck/mce_amd_64.c
...Fixed up trivial conflict in kernel/time/tick-sched.c manually
01 Jan, 2009
1 commit
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…l/git/tip/linux-2.6-tip
* 'irq-fixes-for-linus-4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
sparseirq: move __weak symbols into separate compilation unit
sparseirq: work around __weak alias bug
sparseirq: fix hang with !SPARSE_IRQ
sparseirq: set lock_class for legacy irq when sparse_irq is selected
sparseirq: work around compiler optimizing away __weak functions
sparseirq: fix desc->lock init
sparseirq: do not printk when migrating IRQ descriptors
sparseirq: remove duplicated arch_early_irq_init()
irq: simplify for_each_irq_desc() usage
proc: remove ifdef CONFIG_SPARSE_IRQ from stat.c
irq: for_each_irq_desc() move to irqnr.h
hrtimer: remove #include <linux/irq.h>
31 Dec, 2008
1 commit
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* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86, sparseirq: clean up Kconfig entry
x86: turn CONFIG_SPARSE_IRQ off by default
sparseirq: fix numa_migrate_irq_desc dependency and comments
sparseirq: add kernel-doc notation for new member in irq_desc, -v2
locking, irq: enclose irq_desc_lock_class in CONFIG_LOCKDEP
sparseirq, xen: make sure irq_desc is allocated for interrupts
sparseirq: fix !SMP building, #2
x86, sparseirq: move irq_desc according to smp_affinity, v7
proc: enclose desc variable of show_stat() in CONFIG_SPARSE_IRQ
sparse irqs: add irqnr.h to the user headers list
sparse irqs: handle !GENIRQ platforms
sparseirq: fix !SMP && !PCI_MSI && !HT_IRQ build
sparseirq: fix Alpha build failure
sparseirq: fix typo in !CONFIG_IO_APIC case
x86, MSI: pass irq_cfg and irq_desc
x86: MSI start irq numbering from nr_irqs_gsi
x86: use NR_IRQS_LEGACY
sparse irq_desc[] array: core kernel and x86 changes
genirq: record IRQ_LEVEL in irq_desc[]
irq.h: remove padding from irq_desc on 64bits
26 Dec, 2008
1 commit
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Impact: cleanup
all for_each_irq_desc() usage point have !desc check.
then its check can move into for_each_irq_desc() macro.Signed-off-by: KOSAKI Motohiro
Acked-by: Yinghai Lu
Signed-off-by: Ingo Molnar
18 Dec, 2008
1 commit
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Impact: fix crash
Make sure all Xen irqs have an irq_desc.
Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Ingo Molnar
17 Dec, 2008
1 commit
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Impact: cleanup
hypervisor.h had accumulated a lot of crud, including lots of spurious
#includes. Clean it all up, and go around fixing up everything else
accordingly.Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Ingo Molnar
13 Dec, 2008
2 commits
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Conflicts:
arch/x86/kernel/io_apic.c
kernel/sched.c
kernel/sched_stats.h -
Impact: change existing irq_chip API
Not much point with gentle transition here: the struct irq_chip's
setaffinity method signature needs to change.Fortunately, not widely used code, but hits a few architectures.
Note: In irq_select_affinity() I save a temporary in by mangling
irq_desc[irq].affinity directly. Ingo, does this break anything?(Folded in fix from KOSAKI Motohiro)
Signed-off-by: Rusty Russell
Signed-off-by: Mike Travis
Reviewed-by: Grant Grundler
Acked-by: Ingo Molnar
Cc: ralf@linux-mips.org
Cc: grundler@parisc-linux.org
Cc: jeremy@xensource.com
Cc: KOSAKI Motohiro
08 Dec, 2008
1 commit
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Impact: new feature
Problem on distro kernels: irq_desc[NR_IRQS] takes megabytes of RAM with
NR_CPUS set to large values. The goal is to be able to scale up to much
larger NR_IRQS value without impacting the (important) common case.To solve this, we generalize irq_desc[NR_IRQS] to an (optional) array of
irq_desc pointers.When CONFIG_SPARSE_IRQ=y is used, we use kzalloc_node to get irq_desc,
this also makes the IRQ descriptors NUMA-local (to the site that calls
request_irq()).This gets rid of the irq_cfg[] static array on x86 as well: irq_cfg now
uses desc->chip_data for x86 to store irq_cfg.Signed-off-by: Yinghai Lu
Signed-off-by: Ingo Molnar
18 Nov, 2008
1 commit
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Impact: fix guest kernel crash with CONFIG_XEN_SCRUB_PAGES=y
Jens noticed that scrub_page() has a buggy unmap of the wrong
thing. (virtual address instead of page)Linus pointed out that the whole scrub_page() code is an unnecessary
reimplementation of clear_highpage() to begin with.Just use clear_highpage() rather than reimplementing it poorly.
Reported-by: Jens Axboe
Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Ingo Molnar
05 Nov, 2008
1 commit
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Signed-off-by: Jianjun Kong
Signed-off-by: Linus Torvalds
24 Oct, 2008
3 commits
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use set_xen_guest_handle() instead of direct assigning.
> linux-2.6/drivers/xen/events.c: In function 'xen_poll_irq':
> linux-2.6/drivers/xen/events.c:757: error: incompatible types in assignment
> make[4]: *** [drivers/xen/events.o] Error 1Signed-off-by: Isaku Yamahata
Signed-off-by: Jeremy Fitzhardinge
Cc: Isaku Yamahata
Signed-off-by: Ingo Molnar -
clean up of xencomm.c. is_phys_contiguous() is arch dependent
function that depends on how virtual memory are laid out.
So split out the function into arch specific code.Signed-off-by: Isaku Yamahata
Signed-off-by: Jeremy Fitzhardinge
Cc: Isaku Yamahata
Signed-off-by: Ingo Molnar
Cc: "Luck, Tony" -
It isn't necessary, and it makes the code needlessly non-portable.
Signed-off-by: Jeremy Fitzhardinge
Cc: Isaku Yamahata
Signed-off-by: Ingo Molnar
23 Oct, 2008
1 commit
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Signed-off-by: Al Viro
Signed-off-by: H. Peter Anvin
16 Oct, 2008
4 commits
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Use for_each_irq_desc[_reverse] for all the iteration loops.
Signed-off-by: Thomas Gleixner
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When sparse IRQs are enabled, it is not safe to assume an IRQ descriptor
exists for every possible IRQ. This patch causes init_evtchn_cpu_bindings
to skip initialisation of IRQ descriptors which don't exist.Signed-off-by: Alex Nixon
Acked-by: Jeremy Fitzhardinge
Signed-off-by: Ingo Molnar -
add CONFIG_HAVE_SPARSE_IRQ to for use condensed array.
Get rid of irq_desc[] array assumptions.Preallocate 32 irq_desc, and irq_desc() will try to get more.
( No change in functionality is expected anywhere, except the odd build
failure where we missed a code site or where a crossing commit itroduces
new irq_desc[] usage. )v2: according to Eric, change get_irq_desc() to irq_desc()
Signed-off-by: Yinghai Lu
Signed-off-by: Ingo Molnar -
Signed-off-by: Yinghai Lu
Signed-off-by: Ingo Molnar
03 Oct, 2008
1 commit
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The balloon driver doesn't have any externally callable functions at
the moment, so remove the (effectively empty) header. We can add it
back if we need to.Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Ingo Molnar
10 Sep, 2008
1 commit
09 Sep, 2008
1 commit
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Set the class so it doesn't clash with the normal memory class.
Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Ingo Molnar
===================================================================
05 Sep, 2008
2 commits
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Compile cpu_hotplug.c conditionally on CONFIG_HOTPLUG_CPU
Signed-off-by: Alex Nixon
Signed-off-by: Ingo Molnar -
Signed-off-by: Alex Nixon
Signed-off-by: Ingo Molnar
25 Aug, 2008
2 commits
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This is the last use of (the deprecated) stop_machine_run in the tree.
Signed-off-by: Rusty Russell
Acked-by: Jeremy Fitzhardinge -
Note the changes from 2.6.18-xen CPU hotplugging:
A vcpu_down request from the remote admin via Xenbus both hotunplugs the
CPU, and disables it by removing it from the cpu_present map, and removing
its entry in /sys.A vcpu_up request from the remote admin only re-enables the CPU, and does
not immediately bring the CPU up. A udev event is emitted, which can be
caught by the user if he wishes to automatically re-up CPUs when available,
or implement a more complex policy.Signed-off-by: Alex Nixon
Acked-by: Jeremy Fitzhardinge
Signed-off-by: Ingo Molnar
21 Aug, 2008
1 commit
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A spinlock can be interrupted while spinning, so make sure we preserve
the previous lock of interest if we're taking a lock from within an
interrupt handler.We also need to deal with the case where the blocking path gets
interrupted between testing to see if the lock is free and actually
blocking. If we get interrupted there and end up in the state where
the lock is free but the irq isn't pending, then we'll block
indefinitely in the hypervisor. This fix is to make sure that any
nested lock-takers will always leave the irq pending if there's any
chance the outer lock became free.Signed-off-by: Jeremy Fitzhardinge
Acked-by: Jan Beulich
Signed-off-by: Ingo Molnar
20 Aug, 2008
1 commit
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There are four operating modes Xen code may find itself running in:
- native
- hvm domain
- pv dom0
- pv domUClean up predicates for testing for these states to make them more consistent.
Signed-off-by: Jeremy Fitzhardinge
Cc: Xen-devel
Signed-off-by: Ingo Molnar
31 Jul, 2008
1 commit
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For some reason I managed to miss a bunch of irq-related functions
which also need to be compiled without -pg when using ftrace. This
patch moves them into their own file, and starts a cleanup process
I've been meaning to do anyway.Signed-off-by: Jeremy Fitzhardinge
Cc: Sam Ravnborg
Cc: "Alex Nixon (Intern)"
Cc: Eduardo Habkost
Signed-off-by: Ingo Molnar
28 Jul, 2008
2 commits
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Remove some unused functions:
balloon_update_driver_allowance
balloon_release_driver_page
only used on the (obsolete, removed) flip path in netfront
alloc_empty_pages_and_pagevec
free_empty_pages_and_pagevec
only used in backend drivers; can be reintroduced when neededSigned-off-by: Jeremy Fitzhardinge
Signed-off-by: Ingo Molnar -
1. Set the class so it doesn't clash with the normal memory class
2. Fix up the sysfs show functions to match the new prototype
3. Clean up use of memparseSigned-off-by: Jeremy Fitzhardinge
Cc: "viets@work.de"
Cc: Andi Kleen
Signed-off-by: Ingo Molnar
22 Jul, 2008
1 commit
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This allow to dynamically generate attributes and share show/store
functions between attributes. Right now most attributes are generated
by special macros and lots of duplicated code. With the attribute
passed it's instead possible to attach some data to the attribute
and then use that in shared low level functions to do different things.I need this for the dynamically generated bank attributes in the x86
machine check code, but it'll allow some further cleanups.I converted all users in tree to the new show/store prototype. It's a single
huge patch to avoid unbisectable sections.Runtime tested: x86-32, x86-64
Compiled only: ia64, powerpc
Not compile tested/only grep converted: sh, arm, avr32Signed-off-by: Andi Kleen
Signed-off-by: Greg Kroah-Hartman
21 Jul, 2008
1 commit
18 Jul, 2008
1 commit
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Today's linux-next build (x86_64 allmodconfig) failed like this:
drivers/xen/manage.c: In function 'xen_suspend':
drivers/xen/manage.c:66: error: too few arguments to function 'device_power_up'
drivers/xen/manage.c: In function 'do_suspend':
drivers/xen/manage.c:117: error: too few arguments to function 'device_resume'Caused by commit 1eede070a59e1cc73da51e1aaa00d9ab86572cfc ("Introduce new
top level suspend and hibernation callbacks") interacting with new
usages ...Signed-off-by: Stephen Rothwell
Cc: Jeremy Fitzhardinge
Acked-by: Rafael J. Wysocki
Cc: Jesse Barnes
Signed-off-by: Ingo Molnar
16 Jul, 2008
2 commits
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The standard ticket spinlocks are very expensive in a virtual
environment, because their performance depends on Xen's scheduler
giving vcpus time in the order that they're supposed to take the
spinlock.This implements a Xen-specific spinlock, which should be much more
efficient.The fast-path is essentially the old Linux-x86 locks, using a single
lock byte. The locker decrements the byte; if the result is 0, then
they have the lock. If the lock is negative, then locker must spin
until the lock is positive again.When there's contention, the locker spin for 2^16[*] iterations waiting
to get the lock. If it fails to get the lock in that time, it adds
itself to the contention count in the lock and blocks on a per-cpu
event channel.When unlocking the spinlock, the locker looks to see if there's anyone
blocked waiting for the lock by checking for a non-zero waiter count.
If there's a waiter, it traverses the per-cpu "lock_spinners"
variable, which contains which lock each CPU is waiting on. It picks
one CPU waiting on the lock and sends it an event to wake it up.This allows efficient fast-path spinlock operation, while allowing
spinning vcpus to give up their processor time while waiting for a
contended lock.[*] 2^16 iterations is threshold at which 98% locks have been taken
according to Thomas Friebel's Xen Summit talk "Preventing Guests from
Spinning Around". Therefore, we'd expect the lock and unlock slow
paths will only be entered 2% of the time.Signed-off-by: Jeremy Fitzhardinge
Cc: Jens Axboe
Cc: Peter Zijlstra
Cc: Christoph Lameter
Cc: Petr Tesarik
Cc: Virtualization
Cc: Xen devel
Cc: Thomas Friebel
Cc: Nick Piggin
Signed-off-by: Ingo Molnar -
add xen_timer_resume() hook.
Timer resume should be done after event channel is resumed.
add xen_arch_resume() hook when ipi becomes usable after resume.
After resume, some cpu specific resource must be reinitialized
on ia64 that can't be set by another cpu.However available hooks is run once on only one cpu so that ipi has
to be used.During stop_machine_run() ipi can't be used because interrupt is masked.
So add another hook after stop_machine_run().
Another approach might be use resume hook which is run by
device_resume(). However device_resume() may be executed on
suspend error recovery path.So it is necessary to determine whether it is executed on real resume path
or error recovery path.Signed-off-by: Isaku Yamahata
Cc: Stephen Tweedie
Cc: Eduardo Habkost
Cc: Mark McLoughlin
Signed-off-by: Ingo Molnar
15 Jul, 2008
1 commit
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* 'x86/for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (821 commits)
x86: make 64bit hpet_set_mapping to use ioremap too, v2
x86: get x86_phys_bits early
x86: max_low_pfn_mapped fix #4
x86: change _node_to_cpumask_ptr to return const ptr
x86: I/O APIC: remove an IRQ2-mask hack
x86: fix numaq_tsc_disable calling
x86, e820: remove end_user_pfn
x86: max_low_pfn_mapped fix, #3
x86: max_low_pfn_mapped fix, #2
x86: max_low_pfn_mapped fix, #1
x86_64: fix delayed signals
x86: remove conflicting nx6325 and nx6125 quirks
x86: Recover timer_ack lost in the merge of the NMI watchdog
x86: I/O APIC: Never configure IRQ2
x86: L-APIC: Always fully configure IRQ0
x86: L-APIC: Set IRQ0 as edge-triggered
x86: merge dwarf2 headers
x86: use AS_CFI instead of UNWIND_INFO
x86: use ignore macro instead of hash comment
x86: use matching CFI_ENDPROC
...