Reported-by: David Binderman <dcb314@hotmail.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Alexander Graf <agraf@suse.de>
Bharat Bhushan [Wed, 8 Aug 2012 20:38:19 +0000 (20:38 +0000)]
KVM: PPC: booke: Add watchdog emulation
This patch adds the watchdog emulation in KVM. The watchdog
emulation is enabled by KVM_ENABLE_CAP(KVM_CAP_PPC_BOOKE_WATCHDOG) ioctl.
The kernel timer are used for watchdog emulation and emulates
h/w watchdog state machine. On watchdog timer expiry, it exit to QEMU
if TCR.WRC is non ZERO. QEMU can reset/shutdown etc depending upon how
it is configured.
Signed-off-by: Liu Yu <yu.liu@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com>
[bharat.bhushan@freescale.com: reworked patch] Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
[agraf: adjust to new request framework] Signed-off-by: Alexander Graf <agraf@suse.de>
Alexander Graf [Mon, 13 Aug 2012 10:44:41 +0000 (12:44 +0200)]
KVM: PPC: Add return value in prepare_to_enter
Our prepare_to_enter helper wants to be able to return in more circumstances
to the host than only when an interrupt is pending. Broaden the interface a
bit and move even more generic code to the generic helper.
Alexander Graf [Mon, 13 Aug 2012 10:43:33 +0000 (12:43 +0200)]
KVM: PPC: Ignore EXITING_GUEST_MODE mode
We don't need to do anything when mode is EXITING_GUEST_MODE, because
we essentially are outside of guest mode and did everything it asked
us to do by the time we check it.
Alexander Graf [Sun, 12 Aug 2012 23:04:19 +0000 (01:04 +0200)]
KVM: PPC: Book3S: PR: Rework irq disabling
Today, we disable preemption while inside guest context, because we need
to expose to the world that we are not in a preemptible context. However,
during that time we already have interrupts disabled, which would indicate
that we are in a non-preemptible context.
The reason the checks for irqs_disabled() fail for us though is that we
manually control hard IRQs and ignore all the lazy EE framework. Let's
stop doing that. Instead, let's always use lazy EE to indicate when we
want to disable IRQs, but do a special final switch that gets us into
EE disabled, but soft enabled state. That way when we get back out of
guest state, we are immediately ready to process interrupts.
This simplifies the code drastically and reduces the time that we appear
as preempt disabled.
Alexander Graf [Sun, 12 Aug 2012 09:34:21 +0000 (11:34 +0200)]
KVM: PPC: Book3S: PR: Indicate we're out of guest mode
When going out of guest mode, indicate that we are in vcpu->mode. That way
requests from other CPUs don't needlessly need to kick us to process them,
because it'll just happen next time we enter the guest.
Alexander Graf [Sun, 12 Aug 2012 09:27:49 +0000 (11:27 +0200)]
KVM: PPC: Book3S: PR: Only do resched check once per exit
Now that we use our generic exit helper, we can safely drop our previous
kvm_resched that we used to trigger at the beginning of the exit handler
function.
Alexander Graf [Fri, 10 Aug 2012 11:23:55 +0000 (13:23 +0200)]
KVM: PPC: Book3s: PR: Add (dumb) MMU Notifier support
Now that we have very simple MMU Notifier support for e500 in place,
also add the same simple support to book3s. It gets us one step closer
to actual fast support.
Alexander Graf [Fri, 10 Aug 2012 10:28:50 +0000 (12:28 +0200)]
KVM: PPC: Use same kvmppc_prepare_to_enter code for booke and book3s_pr
We need to do the same things when preparing to enter a guest for booke and
book3s_pr cores. Fold the generic code into a generic function that both call.
Alexander Graf [Tue, 7 Aug 2012 22:44:52 +0000 (00:44 +0200)]
KVM: PPC: BookE: Add some more trace points
Without trace points, debugging what exactly is going on inside guest
code can be very tricky. Add a few more trace points at places that
hopefully tell us more when things go wrong.
Alexander Graf [Fri, 3 Aug 2012 11:56:33 +0000 (13:56 +0200)]
KVM: PPC: Add cache flush on page map
When we map a page that wasn't icache cleared before, do so when first
mapping it in KVM using the same information bits as the Linux mapping
logic. That way we are 100% sure that any page we map does not have stale
entries in the icache.
Alexander Graf [Mon, 30 Jul 2012 22:19:50 +0000 (00:19 +0200)]
KVM: PPC: E500: Implement MMU notifiers
The e500 target has lived without mmu notifiers ever since it got
introduced, but fails for the user space check on them with hugetlbfs.
So in order to get that one working, implement mmu notifiers in a
reasonably dumb fashion and be happy. On embedded hardware, we almost
never end up with mmu notifier calls, since most people don't overcommit.
Signed-off-by: Alexander Graf <agraf@suse.de>
---
v1 -> v2:
- drop refcount for in-use pages
- mark pages dirty at mapping time, not unmapping time
- drop hva_to_memslot usage
Paul Mackerras [Mon, 6 Aug 2012 00:04:14 +0000 (00:04 +0000)]
KVM: PPC: Quieten message about allocating linear regions
This is printed once for every RMA or HPT region that get
preallocated. If one preallocates hundreds of such regions
(in order to run hundreds of KVM guests), that gets rather
painful, so make it a bit quieter.
Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
Paul Mackerras [Mon, 6 Aug 2012 00:03:28 +0000 (00:03 +0000)]
KVM: PPC: Book3S HV: Fix incorrect branch in H_CEDE code
In handling the H_CEDE hypercall, if this vcpu has already been
prodded (with the H_PROD hypercall, which Linux guests don't in fact
use), we branch to a numeric label '1f'. Unfortunately there is
another '1:' label before the one that we want to jump to. This fixes
the problem by using a textual label, 'kvm_cede_prodded'. It also
changes the label for another longish branch from '2:' to
'kvm_cede_exit' to avoid a possible future problem if code modifications
add another numeric '2:' label in between.
Signed-off-by: Paul Mackerras <paulus@samba.org> Signed-off-by: Alexander Graf <agraf@suse.de>
Alexander Graf [Tue, 7 Aug 2012 08:24:14 +0000 (10:24 +0200)]
KVM: PPC: Expose SYNC cap based on mmu notifiers
Semantically, the "SYNC" cap means that we have mmu notifiers available.
Express this in our #ifdef'ery around the feature, so that we can be sure
we don't miss out on ppc targets when they get their implementation.
Scott Wood [Tue, 3 Jul 2012 05:48:55 +0000 (05:48 +0000)]
powerpc/fsl-soc: use CONFIG_EPAPR_PARAVIRT for hcalls
Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
Stuart Yoder [Tue, 3 Jul 2012 05:48:51 +0000 (05:48 +0000)]
KVM: PPC: add pvinfo for hcall opcodes on e500mc/e5500
Signed-off-by: Liu Yu <yu.liu@freescale.com>
[stuart: factored this out from idle hcall support in host patch] Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
Alexander Graf [Tue, 7 Aug 2012 07:40:26 +0000 (13:10 +0530)]
KVM: Add ppc hypercall documentation
Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Raghavendra K T <raghavendra.kt@linux.vnet.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Gleb Natapov [Wed, 8 Aug 2012 12:24:36 +0000 (15:24 +0300)]
KVM: correctly detect APIC SW state in kvm_apic_post_state_restore()
For apic_set_spiv() to track APIC SW state correctly it needs to see
previous and next values of the spurious vector register, but currently
memset() overwrite the old value before apic_set_spiv() get a chance to
do tracking. Fix it by calling apic_set_spiv() before overwriting old
value.
Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Gleb Natapov [Sun, 5 Aug 2012 12:58:26 +0000 (15:58 +0300)]
KVM: clean up kvm_(set|get)_apic_base
kvm_get_apic_base() needlessly checks irqchip_in_kernel although it does
the same no matter what result of the check is. kvm_set_apic_base() also
checks for irqchip_in_kernel, but kvm_lapic_set_base() can handle this
case.
Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Fri, 3 Aug 2012 07:43:51 +0000 (15:43 +0800)]
KVM: let the error pfn not depend on error code
Currently, we use the error code as error pfn to indicat the error
condition, it is not straightforward and it will not work on PAE
32-bit cpu with huge memory, since the valid physical address
can be at most 52 bits
For the normal pfn, the highest 12 bits should be zero, so we can
mask these bits to indicate the error.
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Fri, 3 Aug 2012 07:36:52 +0000 (15:36 +0800)]
KVM: iommu: fix releasing unmapped page
There are two bugs:
- the 'error page' is forgot to be released
[ it is unneeded after commit a2766325cf9f9, for backport, we
still do kvm_release_pfn_clean for the error pfn ]
- guest pages are always released regardless of the unmapped page
(e,g, caused by hwpoison)
Signed-off-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 5 Aug 2012 10:25:10 +0000 (13:25 +0300)]
Merge remote-tracking branch 'upstream' into next
- bring back critical fixes (esp. aa67f6096c19bc)
- provide an updated base for development
* upstream: (4334 commits)
missed mnt_drop_write() in do_dentry_open()
UBIFS: nuke pdflush from comments
gfs2: nuke pdflush from comments
drbd: nuke pdflush from comments
nilfs2: nuke write_super from comments
hfs: nuke write_super from comments
vfs: nuke pdflush from comments
jbd/jbd2: nuke write_super from comments
btrfs: nuke pdflush from comments
btrfs: nuke write_super from comments
ext4: nuke pdflush from comments
ext4: nuke write_super from comments
ext3: nuke write_super from comments
Documentation: fix the VM knobs descritpion WRT pdflush
Documentation: get rid of write_super
vfs: kill write_super and sync_supers
ACPI processor: Fix tick_broadcast_mask online/offline regression
ACPI: Only count valid srat memory structures
ACPI: Untangle a return statement for better readability
Linux 3.6-rc1
...
Linus Torvalds [Sat, 4 Aug 2012 15:32:46 +0000 (08:32 -0700)]
Merge branch 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull VFS fixes and cleanups from Al Viro.
Most of this is the series to remove sync_supers() and the
->write_supers VFS callback from Artem Bityutskiy. One commit to do the
actual removal work, a whole series of commits to fix up stale comments
etc all over the tree.
There's also a regression fix for an incorrect use of mnt_drop_write()
in do_dentry_open().
* 'for-linus-2' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
missed mnt_drop_write() in do_dentry_open()
UBIFS: nuke pdflush from comments
gfs2: nuke pdflush from comments
drbd: nuke pdflush from comments
nilfs2: nuke write_super from comments
hfs: nuke write_super from comments
vfs: nuke pdflush from comments
jbd/jbd2: nuke write_super from comments
btrfs: nuke pdflush from comments
btrfs: nuke write_super from comments
ext4: nuke pdflush from comments
ext4: nuke write_super from comments
ext3: nuke write_super from comments
Documentation: fix the VM knobs descritpion WRT pdflush
Documentation: get rid of write_super
vfs: kill write_super and sync_supers
The '->write_super' superblock method is gone, and this patch removes all the
references to 'write_super' from various jbd and jbd2.
Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Jan Kara <jack@suse.cz> Cc: "Theodore Ts'o" <tytso@mit.edu> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
The '->write_super' superblock method is gone, and this patch removes all the
references to 'write_super' from ext3.
Cc: Jan Kara <jack@suse.cz> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andreas Dilger <adilger.kernel@dilger.ca> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
The '->write_super' superblock method is gone, and this patch removes all the
references to 'write_super' from various pieces of the kernel documentation.
Cc: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Finally we can kill the 'sync_supers' kernel thread along with the
'->write_super()' superblock operation because all the users are gone.
Now every file-system is supposed to self-manage own superblock and
its dirty state.
The nice thing about killing this thread is that it improves power management.
Indeed, 'sync_supers' is a source of monotonic system wake-ups - it woke up
every 5 seconds no matter what - even if there were no dirty superblocks and
even if there were no file-systems using this service (e.g., btrfs and
journalled ext4 do not need it). So it was wasting power most of the time. And
because the thread was in the core of the kernel, all systems had to have it.
So I am quite happy to make it go away.
Interestingly, this thread is a left-over from the pdflush kernel thread which
was a self-forking kernel thread responsible for all the write-back in old
Linux kernels. It was turned into per-block device BDI threads, and
'sync_supers' was a left-over. Thus, R.I.P, pdflush as well.
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Linus Torvalds [Fri, 3 Aug 2012 21:10:00 +0000 (14:10 -0700)]
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux
Pull ACPI and power management fixes from Len Brown:
"A 3.3 sleep regression fixed, numa bugfix, plus some minor cleanups"
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux:
ACPI processor: Fix tick_broadcast_mask online/offline regression
ACPI: Only count valid srat memory structures
ACPI: Untangle a return statement for better readability
ACPI / PCI: Do not try to acquire _OSC control if that is hopeless
ACPI: delete _GTS/_BFS support
ACPI/x86: revert 'x86, acpi: Call acpi_enter_sleep_state via an asmlinkage C function from assembler'
ACPI: replace strlen("string") with sizeof("string") -1
ACPI / PM: Fix build warning in sleep.c for CONFIG_ACPI_SLEEP unset
Linus Torvalds [Fri, 3 Aug 2012 20:24:07 +0000 (13:24 -0700)]
Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd
Pull exofs update from Boaz Harrosh:
"They are all mostly fixes, except the most important patch by Artem
Bityutskiy which removes the use of s_dirt. After this patch s_dirt
can be completely removed from the tree."
* 'for-linus' of git://git.open-osd.org/linux-open-osd:
ore: Fix out-of-bounds access in _ios_obj()
exofs: Use proper max_IO calculations from ore
exofs: Fix __r4w_get_page when offset is beyond i_size
exofs: stop using s_dirt
exofs: readpage_strip: Add a BUG_ON to check for PageLocked(page)
Linus Torvalds [Fri, 3 Aug 2012 18:21:29 +0000 (11:21 -0700)]
Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM bug fixes from Marcelo Tosatti:
- Fix DS/ES segment register corruption on x86_32.
- Fix kvmclock wallclock migration offset.
- Fix PIT interrupt ACK vs system reset logic bug.
* git://git.kernel.org/pub/scm/virt/kvm/kvm:
KVM: VMX: Fix ds/es corruption on i386 with preemption
KVM: x86: apply kvmclock offset to guest wall clock time
KVM: PIC: call ack notifiers for irqs that are dropped form irr
Linus Torvalds [Fri, 3 Aug 2012 18:20:19 +0000 (11:20 -0700)]
Merge tag 'sound-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A bunch of small fixes for ASoC, mainly against regressions due to the
defaulting regmap i/o, in addition to a HD-audio fixup."
* tag 'sound-3.6' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ASoC: core: Fix check before defaulting to regmap
ALSA: hda - Support dock on Lenovo Thinkpad T530 with ALC269VC
ASoC: wm8962: Allow VMID time to fully ramp
ASoC: AC97 doesn't use regmap by default
ASoC: sgtl5000: enable VAG_POWER for LINE_IN
ASoC: ab8500: Inform SoC Core that we have our own I/O arrangements
ASoC: omap: Add missing modules aliases to get sound working on omap devices
sound: tegra_alc5632: Adjust to of_get_named_gpio() change
sound: tegra_wm8903: Adjust to of_get_named_gpio() change
ASoC: mc13783: Provide codec->control_data
ASoC: ux500: Include the correct header files
ASoC: wm8994: Hold runtime PM reference while handling mic and jack IRQs
ASoC: sgtl5000: remove unneeded snd_soc_dapm_new_widgets in probe
ASoC: mxs-saif: set a base clock rate for EXTMASTER mode work
ASoC: mxs-saif: fix clock prepare and enable unbalance issue
ASoC: wm8994: Ensure there are enough BCLKs for four channels
Linus Torvalds [Fri, 3 Aug 2012 18:00:26 +0000 (11:00 -0700)]
Merge branch 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull futex fixes from Ingo Molnar:
"A couple of futex fixes from Darren Hart: two bugs reported by Dave
Jones (found with his trinity test) and Dan Carpenter through static
analysis. The third found while debugging the first two."
* 'core-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
futex: Forbid uaddr == uaddr2 in futex_wait_requeue_pi()
futex: Fix bug in WARN_ON for NULL q.pi_state
futex: Test for pi_mutex on fault in futex_wait_requeue_pi()
Linus Torvalds [Fri, 3 Aug 2012 17:59:36 +0000 (10:59 -0700)]
Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 fixes from Ingo Molnar:
"Various fixes"
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86-64, kcmp: The kcmp system call can be common
arch/x86/kernel/kdebugfs.c: Ensure a consistent return value in error case
x86/mce: Add quirk for instruction recovery on Sandy Bridge processors
x86/mce: Move MCACOD defines from mce-severity.c to <asm/mce.h>
x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs
x86, nops: Missing break resulting in incorrect selection on Intel
x86: CONFIG_CC_STACKPROTECTOR=y is no longer experimental
Linus Torvalds [Fri, 3 Aug 2012 17:58:57 +0000 (10:58 -0700)]
Merge branch 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull timer fixes from Ingo Molnar:
"One regression fix, and a couple of cleanups that clean up the code
flow in areas that had high-profile bugs recently."
* 'timers-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
time: Remove all direct references to timekeeper
time: Clean up offs_real/wall_to_mono and offs_boot/total_sleep_time updates
time: Clean up stray newlines
time/jiffies: Rename ACTHZ to SHIFTED_HZ
time/jiffies: Allow CLOCK_TICK_RATE to be undefined
time: Fix casting issue in tk_set_xtime and tk_xtime_add
Linus Torvalds [Fri, 3 Aug 2012 17:58:13 +0000 (10:58 -0700)]
Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler fixes from Ingo Molnar:
"Fixes and two late cleanups"
* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
sched/cleanups: Add load balance cpumask pointer to 'struct lb_env'
sched: Fix comment about PREEMPT_ACTIVE bit location
sched: Fix minor code style issues
sched: Use task_rq_unlock() in __sched_setscheduler()
sched/numa: Add SD_PERFER_SIBLING to CPU domain
Linus Torvalds [Fri, 3 Aug 2012 17:57:20 +0000 (10:57 -0700)]
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull perf fixes from Ingo Molnar:
"Fix merge window fallout and fix sleep profiling (this was always
broken, so it's not a fix for the merge window - we can skip this one
from the head of the tree)."
* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
perf/trace: Add ability to set a target task for events
perf/x86: Fix USER/KERNEL tagging of samples properly
perf/x86/intel/uncore: Make UNCORE_PMU_HRTIMER_INTERVAL 64-bit
Linus Torvalds [Fri, 3 Aug 2012 17:53:47 +0000 (10:53 -0700)]
Merge tag 'for_linux-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb
Pull KGDB/KDB/usb-dbgp fixes and cleanups from Jason Wessel:
"There are no new features, those will be delayed to the 3.7 window.
There are only fixes/cleanup against the usual kernel churn and we are
removing more lines than we add:
- usb-dbgp - increase the controller wait time to come out of halt.
- kdb - Remove unused KDB_FLAG_ONLY_DO_DUMP code and cpu in more prompt
- debug core - pass NMI type on archs that provide NMI types"
* tag 'for_linux-3.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jwessel/kgdb:
USB: echi-dbgp: increase the controller wait time to come out of halt.
kernel/debug: Make use of KGDB_REASON_NMI
kdb: Remove cpu from the more prompt
kdb: Remove unused KDB_FLAG_ONLY_DO_DUMP
projects / karo-tx-linux.git / log