Commit Graph

322443 Commits

Author SHA1 Message Date
Mathias Krause
0225fb509d KVM: x86 emulator: constify emulate_ops
We never change emulate_ops[] at runtime so it should be r/o.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-05 12:41:48 +03:00
Mathias Krause
fd0a0d8208 KVM: x86 emulator: mark opcode tables const
The opcode tables never change at runtime, therefor mark them const.

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-05 12:41:28 +03:00
Mathias Krause
89a87c6779 KVM: x86 emulator: use aligned variants of SSE register ops
As the the compiler ensures that the memory operand is always aligned
to a 16 byte memory location, use the aligned variant of MOVDQ for
read_sse_reg() and write_sse_reg().

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-05 12:41:11 +03:00
Mathias Krause
326d07cb30 KVM: x86: minor size optimization
Some fields can be constified and/or made static to reduce code and data
size.

Numbers for a 32 bit build:

        text    data     bss     dec     hex filename
before: 3351      80       0    3431     d67 cpuid.o
 after: 3391       0       0    3391     d3f cpuid.o

Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-05 12:41:09 +03:00
Gleb Natapov
ec798660cf KVM: cleanup pic reset
kvm_pic_reset() is not used anywhere. Move reset logic from
pic_ioport_write() there.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2012-09-04 14:53:51 +03:00
Marcelo Tosatti
9a7819774e KVM: x86: remove unused variable from kvm_task_switch()
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-30 17:45:54 -03:00
Avi Kivity
a81aba14dc KVM: VMX: Ignore segment G and D bits when considering whether we can virtualize
We will enter the guest with G and D cleared; as real hardware ignores D in
real mode, and G is taken care of by the limit test, we allow more code to
run in vm86 mode.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:21 -03:00
Avi Kivity
ce56680347 KVM: VMX: Save all segment data in real mode
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:21 -03:00
Avi Kivity
1390a28b27 KVM: VMX: Preserve segment limit and access rights in real mode
While this is undocumented, real processors do not reload the segment
limit and access rights when loading a segment register in real mode.
Real programs rely on it so we need to comply with this behaviour.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:21 -03:00
Avi Kivity
7263642028 KVM: VMX: Return real real-mode segment data even if emulate_invalid_guest_state=1
emulate_invalid_guest_state=1 doesn't mean we don't munge the segments in the
vmcs; we do.  So we need to return the real ones (maintained by vmx_set_segment).

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:21 -03:00
Avi Kivity
0afbe2f878 KVM: x86 emulator: Fix #GP error code during linearization
We want the segment selector, nor segment number.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:20 -03:00
Avi Kivity
a5625189f6 KVM: x86 emulator: Check segment limits in real mode too
Segment limits are verified in real mode, not just protected mode.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:20 -03:00
Avi Kivity
03ebebeb1f KVM: x86 emulator: Leave segment limit and attributs alone in real mode
When loading a segment in real mode, only the base and selector must
be modified.  The limit needs to be left alone, otherwise big real mode
users will hit a #GP due to limit checking (currently this is suppressed
because we don't check limits in real mode).

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:20 -03:00
Avi Kivity
e2a610d7fc KVM: VMX: Allow vm86 virtualization of big real mode
Usually, big real mode uses large (4GB) segments.  Currently we don't
virtualize this; if any segment has a limit other than 0xffff, we emulate.
But if we set the vmx-visible limit to 0xffff, we can use vm86 to virtualize
real mode; if an access overruns the segment limit, the guest will #GP, which
we will trap and forward to the emulator.  This results in significantly
faster execution, and less risk of hitting an unemulated instruction.

If the limit is less than 0xffff, we retain the existing behaviour.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:20 -03:00
Avi Kivity
495e116684 KVM: VMX: Allow real mode emulation using vm86 with dpl=0
Real mode is always entered from protected mode with dpl=0.  Since
the dpl doesn't affect execution, and we already override it to 3
in the vmcs (as vmx requires), we can allow execution in that state.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:20 -03:00
Avi Kivity
c865c43de6 KVM: VMX: Retain limit and attributes when entering protected mode
Real processors don't change segment limits and attributes while in
real mode.  Mimic that behaviour.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:20 -03:00
Avi Kivity
f5f7b2fe3b KVM: VMX: Use kvm_segment to save protected-mode segments when entering realmode
Instead of using struct kvm_save_segment, use struct kvm_segment, which is what
the other APIs use.  This leads to some simplification.

We replace save_rmode_seg() with a call to vmx_save_segment().  Since this depends
on rmode.vm86_active, we move the call to before setting the flag.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:19 -03:00
Avi Kivity
72fbefec26 KVM: VMX: Fix incorrect lookup of segment S flag in fix_pmode_dataseg()
fix_pmode_dataseg() looks up S in ->base instead of ->ar_bytes.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:19 -03:00
Avi Kivity
baa7e81e32 KVM: VMX: Separate saving pre-realmode state from setting segments
Commit b246dd5df1 ("KVM: VMX: Fix KVM_SET_SREGS with big real mode
segments") moved fix_rmode_seg() to vmx_set_segment(), so that it is
applied not just on transitions to real mode, but also on KVM_SET_SREGS
(migration).  However fix_rmode_seg() not only munges the vmcs segments,
it also sets up the save area for us to restore when returning to
protected mode or to return in vmx_get_segment().

Move saving the segment into a new function, save_rmode_seg(), and
call it just during the transition.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 20:02:19 -03:00
Avi Kivity
dd856efafe KVM: x86 emulator: access GPRs on demand
Instead of populating the entire register file, read in registers
as they are accessed, and write back only the modified ones.  This
saves a VMREAD and VMWRITE on Intel (for rsp, since it is not usually
used during emulation), and a two 128-byte copies for the registers.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 18:38:55 -03:00
Gavin Shan
66a03505a7 KVM: PPC: book3s: fix build error caused by gfn_to_hva_memslot()
The build error was caused by that builtin functions are calling
the functions implemented in modules. This error was introduced by
commit 4d8b81abc4 ("KVM: introduce readonly memslot").

The patch fixes the build error by moving function __gfn_to_hva_memslot()
from kvm_main.c to kvm_host.h and making that "inline" so that the
builtin function (kvmppc_h_enter) can use that.

Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Gavin Shan <shangw@linux.vnet.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-27 16:44:20 -03:00
Marcelo Tosatti
c78aa4c4b9 Merge remote-tracking branch 'upstream/master' into queue
Merging critical fixes from upstream required for development.

* upstream/master: (809 commits)
  libata: Add a space to " 2GB ATA Flash Disk" DMA blacklist entry
  Revert "powerpc: Update g5_defconfig"
  powerpc/perf: Use pmc_overflow() to detect rolled back events
  powerpc: Fix VMX in interrupt check in POWER7 copy loops
  powerpc: POWER7 copy_to_user/copy_from_user patch applied twice
  powerpc: Fix personality handling in ppc64_personality()
  powerpc/dma-iommu: Fix IOMMU window check
  powerpc: Remove unnecessary ifdefs
  powerpc/kgdb: Restore current_thread_info properly
  powerpc/kgdb: Bail out of KGDB when we've been triggered
  powerpc/kgdb: Do not set kgdb_single_step on ppc
  powerpc/mpic_msgr: Add missing includes
  powerpc: Fix null pointer deref in perf hardware breakpoints
  powerpc: Fixup whitespace in xmon
  powerpc: Fix xmon dl command for new printk implementation
  xfs: check for possible overflow in xfs_ioc_trim
  xfs: unlock the AGI buffer when looping in xfs_dialloc
  xfs: fix uninitialised variable in xfs_rtbuf_get()
  powerpc/fsl: fix "Failed to mount /dev: No such device" errors
  powerpc/fsl: update defconfigs
  ...

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2012-08-26 13:58:41 -03:00
Linus Torvalds
9acb172543 arm-soc fixes for v3.6-rc3
Bug fixes for various ARM platforms. About half of these are
 for OMAP and submitted before but did not make it into v3.6-rc2.
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Merge tag 'fixes-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull arm-soc fixes from Arnd Bergmann:
 "Bug fixes for various ARM platforms.  About half of these are for OMAP
  and submitted before but did not make it into v3.6-rc2."

* tag 'fixes-3.6-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (39 commits)
  ARM: ux500: don't select LEDS_GPIO for snowball
  ARM: imx: build i.MX6 functions only when needed
  ARM: imx: select CPU_FREQ_TABLE when needed
  ARM: imx: fix ksz9021rn_phy_fixup
  ARM: imx: build pm-imx5 code only when PM is enabled
  ARM: omap: allow building omap44xx without SMP
  ARM: dts: imx51-babbage: fix esdhc cd/wp properties
  ARM: imx6: spin the cpu until hardware takes it down
  ARM: ux500: Ensure probing of Audio devices when Device Tree is enabled
  ARM: ux500: Fix merge error, no matching driver name for 'snd_soc_u8500'
  ARM i.MX6q: Add virtual 1/3.5 dividers in the LDB clock path
  ARM: Kirkwood: fix Makefile.boot
  ARM: Kirkwood: Fix iconnect leds
  ARM: Orion: Set eth packet size csum offload limit
  ARM: mv78xx0: fix win_cfg_base prototype
  ARM: OMAP: dmtimers: Fix locking issue in omap_dm_timer_request*()
  ARM: mmp: fix potential NULL dereference
  ARM: OMAP4: Register the OPP table only for 4430 device
  cpufreq: OMAP: Handle missing frequency table on SMP systems
  ARM: OMAP4: sleep: Save the complete used register stack frame
  ...
2012-08-25 17:33:33 -07:00
Linus Torvalds
267560874c Three bug-fixes:
- Revert the kexec fix which caused on non-kexec shutdowns a race.
  - Reuse existing P2M leafs - instead of requiring to allocate a large
    area of bootup virtual address estate.
  - Fix a one-off error when adding PFNs for balloon pages.
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Merge tag 'stable/for-linus-3.6-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen

Pull three xen bug-fixes from Konrad Rzeszutek Wilk:
 - Revert the kexec fix which caused on non-kexec shutdowns a race.
 - Reuse existing P2M leafs - instead of requiring to allocate a large
   area of bootup virtual address estate.
 - Fix a one-off error when adding PFNs for balloon pages.

* tag 'stable/for-linus-3.6-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/konrad/xen:
  xen/setup: Fix one-off error when adding for-balloon PFNs to the P2M.
  xen/p2m: Reuse existing P2M leafs if they are filled with 1:1 PFNs or INVALID.
  Revert "xen PVonHVM: move shared_info to MMIO before kexec"
2012-08-25 17:31:59 -07:00
Linus Torvalds
4ae4614712 Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
Pull powerpc fixes from Benjamin Herrenschmidt:
 "I meant to sent that earlier but got swamped with other things, so
  here are some powerpc fixes for 3.6.  A few regression fixes and some
  bug fixes that I deemed should still make it.

  There's a FSL update from Kumar with a bunch of defconfig updates
  along with a few embedded fixes.

  I also reverted my g5_defconfig update that I merged earlier as it was
  completely busted, not too sure what happened there, I'll do a new one
  later."

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc:
  Revert "powerpc: Update g5_defconfig"
  powerpc/perf: Use pmc_overflow() to detect rolled back events
  powerpc: Fix VMX in interrupt check in POWER7 copy loops
  powerpc: POWER7 copy_to_user/copy_from_user patch applied twice
  powerpc: Fix personality handling in ppc64_personality()
  powerpc/dma-iommu: Fix IOMMU window check
  powerpc: Remove unnecessary ifdefs
  powerpc/kgdb: Restore current_thread_info properly
  powerpc/kgdb: Bail out of KGDB when we've been triggered
  powerpc/kgdb: Do not set kgdb_single_step on ppc
  powerpc/mpic_msgr: Add missing includes
  powerpc: Fix null pointer deref in perf hardware breakpoints
  powerpc: Fixup whitespace in xmon
  powerpc: Fix xmon dl command for new printk implementation
  powerpc/fsl: fix "Failed to mount /dev: No such device" errors
  powerpc/fsl: update defconfigs
  booke/wdt: some ioctls do not return values properly
  powerpc/p4080ds: dts - add usb controller version info and port0
  powerpc/85xx: mpc85xx_defconfig - add VIA PATA support for MPC85xxCDS
  powerpc/fsl-pci: Only scan PCI bus if configured as a host
2012-08-25 17:30:18 -07:00
Linus Torvalds
6ec9776c28 Merge git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull kvm fixes from Marcelo Tosatti.

* git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: x86 emulator: use stack size attribute to mask rsp in stack ops
  KVM: MMU: Fix mmu_shrink() so that it can free mmu pages as intended
  ppc: e500_tlb memset clears nothing
  KVM: PPC: Add cache flush on page map
  KVM: PPC: Book3S HV: Fix incorrect branch in H_CEDE code
  KVM: x86: update KVM_SAVE_MSRS_BEGIN to correct value
2012-08-25 17:27:17 -07:00
Linus Torvalds
e1d33a5c63 xfs: bugfixes for 3.6-rc4
- fix uninitialised variable in xfs_rtbuf_get()
 - unlock the AGI buffer when looping in xfs_dialloc
 - check for possible overflow in xfs_ioc_trim
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Merge tag 'for-linus-v3.6-rc4' of git://oss.sgi.com/xfs/xfs

Pull xfs bugfixes from Ben Myers:
 - fix uninitialised variable in xfs_rtbuf_get()
 - unlock the AGI buffer when looping in xfs_dialloc
 - check for possible overflow in xfs_ioc_trim

* tag 'for-linus-v3.6-rc4' of git://oss.sgi.com/xfs/xfs:
  xfs: check for possible overflow in xfs_ioc_trim
  xfs: unlock the AGI buffer when looping in xfs_dialloc
  xfs: fix uninitialised variable in xfs_rtbuf_get()
2012-08-25 11:47:06 -07:00
Linus Torvalds
2432cbe4f2 Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus
Pull MIPS fixes from Ralf Baechle:
 "Random fixes across the MIPS tree.  The two hotspots are several bugs
  in the module loader and the ath79 SOC support; also noteworthy is the
  restructuring of the code to synchronize CPU timers across CPUs on
  startup; the old code recently ceased to work due to unrelated
  changes.

  All except one of these patches have sat for a significant time in
  linux-next for testing."

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: pci-ar724x: avoid data bus error due to a missing PCIe module
  MIPS: Malta: Delete duplicate PCI fixup.
  MIPS: ath79: don't hardcode the unavailability of the DSP ASE
  MIPS: Synchronize MIPS count one CPU at a time
  MIPS: BCM63xx: Fix SPI message control register handling for BCM6338/6348.
  MIPS: Module: Deal with malformed HI16/LO16 relocation sequences.
  MIPS: Fix race condition in module relocation code.
  MIPS: Fix memory leak in error path of HI16/LO16 relocation handling.
  MIPS: MTX-1: Add udelay to mtx1_pci_idsel
  MIPS: ath79: select HAVE_CLK
  MIPS: ath79: Use correct IRQ number for the OHCI controller on AR7240
  MIPS: ath79: Fix number of GPIO lines for AR724[12]
  MIPS: Octeon: Fix broken interrupt controller code.
2012-08-25 11:45:04 -07:00
Linus Torvalds
8497ae61d0 Merge branch 'for-3.6' of git://linux-nfs.org/~bfields/linux
Pull nfsd bugfixes from J. Bruce Fields:
 "Particular thanks to Michael Tokarev, Malahal Naineni, and Jamie
  Heilman for their testing and debugging help."

* 'for-3.6' of git://linux-nfs.org/~bfields/linux:
  svcrpc: fix svc_xprt_enqueue/svc_recv busy-looping
  svcrpc: sends on closed socket should stop immediately
  svcrpc: fix BUG() in svc_tcp_clear_pages
  nfsd4: fix security flavor of NFSv4.0 callback
2012-08-25 11:43:41 -07:00
Linus Torvalds
a7e546f175 Merge branch 'for-linus' of git://git.kernel.dk/linux-block
Pull block-related fixes from Jens Axboe:

 - Improvements to the buffered and direct write IO plugging from
   Fengguang.

 - Abstract out the mapping of a bio in a request, and use that to
   provide a blk_bio_map_sg() helper.  Useful for mapping just a bio
   instead of a full request.

 - Regression fix from Hugh, fixing up a patch that went into the
   previous release cycle (and marked stable, too) attempting to prevent
   a loop in __getblk_slow().

 - Updates to discard requests, fixing up the sizing and how we align
   them.  Also a change to disallow merging of discard requests, since
   that doesn't really work properly yet.

 - A few drbd fixes.

 - Documentation updates.

* 'for-linus' of git://git.kernel.dk/linux-block:
  block: replace __getblk_slow misfix by grow_dev_page fix
  drbd: Write all pages of the bitmap after an online resize
  drbd: Finish requests that completed while IO was frozen
  drbd: fix drbd wire compatibility for empty flushes
  Documentation: update tunable options in block/cfq-iosched.txt
  Documentation: update tunable options in block/cfq-iosched.txt
  Documentation: update missing index files in block/00-INDEX
  block: move down direct IO plugging
  block: remove plugging at buffered write time
  block: disable discard request merge temporarily
  bio: Fix potential memory leak in bio_find_or_create_slab()
  block: Don't use static to define "void *p" in show_partition_start()
  block: Add blk_bio_map_sg() helper
  block: Introduce __blk_segment_map_sg() helper
  fs/block-dev.c:fix performance regression in O_DIRECT writes to md block devices
  block: split discard into aligned requests
  block: reorganize rounding of max_discard_sectors
2012-08-25 11:36:43 -07:00
Linus Torvalds
da31ce727e 1) libata-acpi regression fix
2) additional or corrected drive quirks for ata_blacklist
 
 3) Kconfig text tweaking
 
 4) new PCI IDs
 
 5) pata_atiixp: quirk for MSI motherboard
 
 6) export ahci_dev_classify for an ahci_platform driver
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Merge tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev

Pull libata fixes from Jeff Garzik:
 - libata-acpi regression fix
 - additional or corrected drive quirks for ata_blacklist
 - Kconfig text tweaking
 - new PCI IDs
 - pata_atiixp: quirk for MSI motherboard
 - export ahci_dev_classify for an ahci_platform driver

* tag 'upstream-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jgarzik/libata-dev:
  libata: Add a space to " 2GB ATA Flash Disk" DMA blacklist entry
  [libata] new quirk, lift bridge limits for Buffalo DriveStation Quattro
  [libata] Kconfig: Elaborate that SFF is meant for legacy and PATA stuff
  [libata] acpi: call ata_acpi_gtm during ata port init time
  ata_piix: Add Device IDs for Intel Lynx Point-LP PCH
  ahci: Add Device IDs for Intel Lynx Point-LP PCH
  pata_atiixp: override cable detection on MSI E350DM-E33
  ahci: un-staticize ahci_dev_classify
2012-08-25 10:28:19 -07:00
Prarit Bhargava
d17d794c63 libata: Add a space to " 2GB ATA Flash Disk" DMA blacklist entry
commit d70e551c8e, Add " 2GB ATA Flash
Disk"/"ADMA428M" to DMA blacklist, should have added a space before 2GB.

Signed-off-by: Prarit Bhargava <prarit@redhat.com>
Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2012-08-25 10:16:45 -04:00
Benjamin Herrenschmidt
2c39bf49fd Revert "powerpc: Update g5_defconfig"
This reverts commit b1acf1bb54.

Something went horribly wrong when I did savedefconfig, not sure what,
but what's in there is busted so let's revert it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:55:55 +10:00
Sukadev Bhattiprolu
813312110b powerpc/perf: Use pmc_overflow() to detect rolled back events
For certain speculative events on Power7, 'perf stat' reports far higher
event count than 'perf record' for the same event.

As described in following commit, a performance monitor exception is raised
even when the the performance events are rolled back.

        commit 0837e3242c
        Author: Anton Blanchard <anton@samba.org>
        Date:   Wed Mar 9 14:38:42 2011 +1100

perf_event_interrupt() records an event only when an overflow occurs. But
this check for overflow is a simple 'if (val < 0)'.

Because the events are rolled back, this check for overflow fails and the
event is not recorded. perf_event_interrupt() later uses pmc_overflow() to
detect the overflow and resets the counters and the events are lost completely.

To properly detect the overflow of rolled back events, use pmc_overflow()
even when recording events.

To reproduce:
        $ cat strcpy.c
        #include <stdio.h>
        #include <string.h>
        main()
        {
                char buf[256];

                alarm(5);
                while(1)
                        strcpy(buf, "string1");
        }

        $ perf record -e r20014 ./strcpy
        $ perf report -n > report.1
        $ perf stat -e r20014 > report.2
        # Compare report.1 and report.2

Reported-by: Maynard Johnson <mpjohn@us.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:10 +10:00
Anton Blanchard
2fae7cdb60 powerpc: Fix VMX in interrupt check in POWER7 copy loops
The enhanced prefetch hint patches corrupt the condition register
that was used to check if we are in interrupt. Fix this by using cr1.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:09 +10:00
Anton Blanchard
dad477ccd6 powerpc: POWER7 copy_to_user/copy_from_user patch applied twice
"powerpc: Use enhanced touch instructions in POWER7
copy_to_user/copy_from_user" was applied twice. Remove one.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:09 +10:00
Jiri Kosina
7256a5d2da powerpc: Fix personality handling in ppc64_personality()
Directly comparing current->personality against PER_LINUX32 doesn't work
in cases when any of the personality flags stored in the top three bytes
are used.

Directly forcefully setting personality to PER_LINUX32 or PER_LINUX
discards any flags stored in the top three bytes

Use personality() macro to compare only PER_MASK bytes and make sure that
we are setting only the bits that should be set, instead of overwriting
the whole value.

Signed-off-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:07 +10:00
Aaro Koskinen
4c374af5fd powerpc/dma-iommu: Fix IOMMU window check
Checking for device mask to cover the whole IOMMU table is too strict.
IOMMU allocators should handle mask constraint properly for each
allocation.

The patch enables to use old AirPort Extreme cards on PowerMacs with
more than 1GB of memory; without the patch the driver init fails with:

  b43-pci-bridge 0001:01:01.0: Warning: IOMMU window too big for device mask
  b43-pci-bridge 0001:01:01.0: mask: 0x3fffffff, table end: 0x80000000
  b43-phy0 ERROR: The machine/kernel does not support the required 30-bit DMA mask

Signed-off-by: Aaro Koskinen <aaro.koskinen@iki.fi>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:07 +10:00
Michael Neuling
f0f0c9ac20 powerpc: Remove unnecessary ifdefs
Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:06 +10:00
Tiejun Chen
5f630401f9 powerpc/kgdb: Restore current_thread_info properly
For powerpc BooKE and e200, singlestep is handled on the critical/dbg
exception stack. This causes current_thread_info() to fail for kgdb
internal, so previously We work around this issue by copying
the thread_info from the kernel stack before calling kgdb_handle_exception,
and copying it back afterwards.

But actually we don't do this properly. We should backup current_thread_info
then restore that when exit.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:06 +10:00
Tiejun Chen
949616cf2d powerpc/kgdb: Bail out of KGDB when we've been triggered
We need to skip a breakpoint exception when it occurs after
a breakpoint has already been removed.

Signed-off-by: Tiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:05 +10:00
Tiejun Chen
572b411cb4 powerpc/kgdb: Do not set kgdb_single_step on ppc
The kgdb_single_step flag has the possibility to indefinitely
hang the system on an SMP system.

The x86 arch have the same problem, and that problem was fixed by
commit 8097551d9ab9b9e3630(kgdb,x86: do not set kgdb_single_step
on x86). This patch does the same behaviors as x86's patch.

Signed-off-by: Dongdong Deng <dongdong.deng@windriver.com>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:05 +10:00
Scott Wood
46c5c59e69 powerpc/mpic_msgr: Add missing includes
Add several #includes that mpic_msgr relies on being pulled implicitly,
which only happens on certain configs.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Cc: Meador Inge <meador_inge@mentor.com>
Cc: Jia Hongtao <B38951@freescale.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:04 +10:00
Michael Neuling
6d9c00c67b powerpc: Fix null pointer deref in perf hardware breakpoints
Currently if you are doing a global perf recording with hardware
breakpoints (ie perf record -e mem:0xdeadbeef -a), you can oops with:

  Faulting instruction address: 0xc000000000738890
  cpu 0xc: Vector: 300 (Data Access) at [c0000003f76af8d0]
      pc: c000000000738890: .hw_breakpoint_handler+0xa0/0x1e0
      lr: c000000000738830: .hw_breakpoint_handler+0x40/0x1e0
      sp: c0000003f76afb50
     msr: 8000000000001032
     dar: 6f0
   dsisr: 42000000
    current = 0xc0000003f765ac00
    paca    = 0xc00000000f262a00   softe: 0        irq_happened: 0x01
    pid   = 6810, comm = loop-read
  enter ? for help
  [c0000003f76afbe0] c00000000073cd04 .notifier_call_chain.isra.0+0x84/0xe0
  [c0000003f76afc80] c00000000073cdbc .notify_die+0x3c/0x60
  [c0000003f76afd20] c0000000000139f0 .do_dabr+0x40/0xf0
  [c0000003f76afe30] c000000000005a9c handle_dabr_fault+0x14/0x48
  --- Exception: 300 (Data Access) at 0000000010000480
  SP (ff8679e0) is in userspace

This is because we don't check to see if the break point is associated
with task before we deference the task_struct pointer.

This changes the update to use current.

Signed-off-by: Michael Neuling <mikey@neuling.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:04 +10:00
Michael Ellerman
e3bc8049e5 powerpc: Fixup whitespace in xmon
There are a few whitespace goolies in xmon.c, some of them appear to
be my fault. Fix them all in one go.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:03 +10:00
Michael Ellerman
ca5dd3954a powerpc: Fix xmon dl command for new printk implementation
Since the printk internals were reworked the xmon 'dl' command which
dumps the content of __log_buf has stopped working.

It is now a structured buffer, so just dumping it doesn't really work.

Use the helpers added for kgdb to print out the content.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2012-08-24 20:26:03 +10:00
Linus Torvalds
2d809dcd88 Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto fixes from Herbert Xu:
 "This push fixes a build error on 32-bit archs in the hifn driver as
  well as a potential deadlock in the caam driver."

* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: caam - fix possible deadlock condition
  crypto: hifn_795x - fix 64bit division and undefined __divdi3 on 32bit archs
2012-08-23 21:58:04 -07:00
Linus Torvalds
62688e5b64 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull UDF, ext3 & reiserfs fixes from Jan Kara:
 "A couple of fixes (udf, reiserfs, ext3) that accumulated over my
  vacation."

* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
  udf: fix retun value on error path in udf_load_logicalvol
  jbd: don't write superblock when unmounting an ro filesystem
  reiserfs: fix deadlocks with quotas
  quota: Move down dqptr_sem read after initializing default warn[] type at __dquot_alloc_space().
  UDF: During mount free lvid_bh before rescanning with different blocksize
  udf: fix udf_setsize() for file data in ICB
2012-08-23 21:56:22 -07:00
Linus Torvalds
f4673d6f18 UBIFS fixes for 3.6:
1. Fix crash on error which prevents emulated power-cut testing.
 2. Fix log reply regression introduced in 3.6-rc1.
 3. Fix UBIFS complaints about too small debug buffer size which.
 4. Fix error message spelling, and remove incorrect commentary.
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Merge tag 'upstream-3.6-rc3' of git://git.infradead.org/linux-ubifs

Pull UBIFS fixes from Artem Bityutskiy:
 - Fix crash on error which prevents emulated power-cut testing.
 - Fix log reply regression introduced in 3.6-rc1.
 - Fix UBIFS complaints about too small debug buffer size which.
 - Fix error message spelling, and remove incorrect commentary.

* tag 'upstream-3.6-rc3' of git://git.infradead.org/linux-ubifs:
  UBIFS: fix error messages spelling
  UBIFS: fix complaints about too small debug buffer size
  UBIFS: fix replay regression
  UBIFS: fix crash on error path
  UBIFS: remove stale commentary
2012-08-23 21:50:40 -07:00
Linus Torvalds
270868f6e6 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide
Pull IDE power management bugfix from David S. Miller.

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/ide:
  ide: fix generic_ide_suspend/resume Oops
2012-08-23 21:49:56 -07:00