Commit Graph

47969 Commits

Author SHA1 Message Date
Linus Torvalds
03da309867 Merge git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/jejb/scsi-misc-2.6: (276 commits)
  [SCSI] zfcp: Trigger logging in the FCP channel on qdio error conditions
  [SCSI] zfcp: Introduce experimental support for DIF/DIX
  [SCSI] zfcp: Enable data division support for FCP devices
  [SCSI] zfcp: Prevent access on uninitialized memory.
  [SCSI] zfcp: Post events through FC transport class
  [SCSI] zfcp: Cleanup QDIO attachment and improve processing.
  [SCSI] zfcp: Cleanup function parameters for sbal value.
  [SCSI] zfcp: Use correct width for timer_interval field
  [SCSI] zfcp: Remove SCSI device when removing unit
  [SCSI] zfcp: Use memdup_user and kstrdup
  [SCSI] zfcp: Fix retry after failed "open port" erp action
  [SCSI] zfcp: Fail erp after timeout
  [SCSI] zfcp: Use forced_reopen in terminate_rport_io callback
  [SCSI] zfcp: Register SCSI devices after successful fc_remote_port_add
  [SCSI] zfcp: Do not try "forced close" when port is already closed
  [SCSI] zfcp: Do not unblock rport from REOPEN_PORT_FORCED
  [SCSI] sd: add support for runtime PM
  [SCSI] implement runtime Power Management
  [SCSI] convert to the new PM framework
  [SCSI] Unify SAM_ and SAM_STAT_ macros
  ...
2010-08-04 15:15:15 -07:00
Linus Torvalds
6ba74014c1 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1443 commits)
  phy/marvell: add 88ec048 support
  igb: Program MDICNFG register prior to PHY init
  e1000e: correct MAC-PHY interconnect register offset for 82579
  hso: Add new product ID
  can: Add driver for esd CAN-USB/2 device
  l2tp: fix export of header file for userspace
  can-raw: Fix skb_orphan_try handling
  Revert "net: remove zap_completion_queue"
  net: cleanup inclusion
  phy/marvell: add 88e1121 interface mode support
  u32: negative offset fix
  net: Fix a typo from "dev" to "ndev"
  igb: Use irq_synchronize per vector when using MSI-X
  ixgbevf: fix null pointer dereference due to filter being set for VLAN 0
  e1000e: Fix irq_synchronize in MSI-X case
  e1000e: register pm_qos request on hardware activation
  ip_fragment: fix subtracting PPPOE_SES_HLEN from mtu twice
  net: Add getsockopt support for TCP thin-streams
  cxgb4: update driver version
  cxgb4: add new PCI IDs
  ...

Manually fix up conflicts in:
 - drivers/net/e1000e/netdev.c: due to pm_qos registration
   infrastructure changes
 - drivers/net/phy/marvell.c: conflict between adding 88ec048 support
   and cleaning up the IDs
 - drivers/net/wireless/ipw2x00/ipw2100.c: trivial ipw2100_pm_qos_req
   conflict (registration change vs marking it static)
2010-08-04 11:47:58 -07:00
Linus Torvalds
d5fc1d5175 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/bp/bp:
  amd64_edac: Minor formatting fix
  amd64_edac: Fix operator precendence error
  edac, mc: Improve scrub rate handling
  amd64_edac: Correct scrub rate setting
  amd64_edac: Fix DCT base address selector
  amd64_edac: Remove polling mechanism
  x86, mce: Notify about corrected events too
  amd64_edac: Remove unneeded defines
  edac: Remove EDAC_DEBUG_VERBOSE
  amd64_edac: Sanitize syndrome extraction
2010-08-04 11:23:59 -07:00
Kyle McMartin
d9b68e5e88 parisc: pass through '\t' to early (iodc) console
The firmware handles '\t' internally, so stop trying to emulate it
(which, incidentally, had a bug in it.)

Fixes a really weird hang at bootup in rcu_bootup_announce, which,
as far as I can tell, is the first printk in the core kernel to use
a tab as the first character.

Cc: stable@kernel.org
Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-08-04 11:17:10 -07:00
Linus Torvalds
8d91530c5f Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Remove pointless printk from p4-clockmod.
  [CPUFREQ] Fix section mismatch for powernow_cpu_init in powernow-k7.c
  [CPUFREQ] Fix section mismatch for longhaul_cpu_init.
  [CPUFREQ] Fix section mismatch for longrun_cpu_init.
  [CPUFREQ] powernow-k8: Fix misleading variable naming
  [CPUFREQ] Convert pci_table entries to PCI_VDEVICE (if PCI_ANY_ID is used)
  [CPUFREQ] arch/x86/kernel/cpu/cpufreq: use for_each_pci_dev()
  [CPUFREQ] fix brace coding style issue.
  [CPUFREQ] x86 cpufreq: Make trace_power_frequency cpufreq driver independent
  [CPUFREQ] acpi-cpufreq: Fix CPU_ANY CPUFREQ_{PRE,POST}CHANGE notification
  [CPUFREQ] ondemand: don't synchronize sample rate unless multiple cpus present
  [CPUFREQ] unexport (un)lock_policy_rwsem* functions
  [CPUFREQ] ondemand: Refactor frequency increase code
  [CPUFREQ] powernow-k8: On load failure, remind the user to enable support in BIOS setup
  [CPUFREQ] powernow-k8: Limit Pstate transition latency check
  [CPUFREQ] Fix PCC driver error path
  [CPUFREQ] fix double freeing in error path of pcc-cpufreq
  [CPUFREQ] pcc driver should check for pcch method before calling _OSC
  [CPUFREQ] fix memory leak in cpufreq_add_dev
  [CPUFREQ] revert "[CPUFREQ] remove rwsem lock from CPUFREQ_GOV_STOP call (second call site)"

Manually fix up non-data merge conflict introduced by new calling
conventions for trace_power_start() in commit 6f4f2723d0 ("x86
cpufreq: Make trace_power_frequency cpufreq driver independent"), which
didn't update the intel_idle native hardware cpuidle driver.
2010-08-04 11:13:36 -07:00
Linus Torvalds
c145307a11 Merge branch 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86
* 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mjg59/platform-drivers-x86: (88 commits)
  ips driver: make it less chatty
  intel_scu_ipc: fix size field for intel_scu_ipc_command
  intel_scu_ipc: return -EIO for error condition in busy_loop
  intel_scu_ipc: fix data packing of PMIC command on Moorestown
  Clean up command packing on MRST.
  zero the stack buffer before giving random garbage to the SCU
  Fix stack buffer size for IPC writev messages
  intel_scu_ipc: Use the new cpu identification function
  intel_scu_ipc: tidy up unused bits
  Remove indirect read write api support.
  intel_scu_ipc: Support Medfield processors
  intel_scu_ipc: detect CPU type automatically
  x86 plat: limit x86 platform driver menu to X86
  acpi ec_sys: Be more cautious about ec write access
  acpi ec: Fix possible double io port registration
  hp-wmi: acpi_drivers.h is already included through acpi.h two lines below
  hp-wmi: Fix mixing up of and/or directive
  dell-laptop: make dell_laptop_i8042_filter() static
  asus-laptop: fix asus_input_init error path
  msi-wmi: make needlessly global symbols static
  ...
2010-08-04 10:44:06 -07:00
Linus Torvalds
5e83f6fbdb Merge branch 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm
* 'kvm-updates/2.6.36' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (198 commits)
  KVM: VMX: Fix host GDT.LIMIT corruption
  KVM: MMU: using __xchg_spte more smarter
  KVM: MMU: cleanup spte set and accssed/dirty tracking
  KVM: MMU: don't atomicly set spte if it's not present
  KVM: MMU: fix page dirty tracking lost while sync page
  KVM: MMU: fix broken page accessed tracking with ept enabled
  KVM: MMU: add missing reserved bits check in speculative path
  KVM: MMU: fix mmu notifier invalidate handler for huge spte
  KVM: x86 emulator: fix xchg instruction emulation
  KVM: x86: Call mask notifiers from pic
  KVM: x86: never re-execute instruction with enabled tdp
  KVM: Document KVM_GET_SUPPORTED_CPUID2 ioctl
  KVM: x86: emulator: inc/dec can have lock prefix
  KVM: MMU: Eliminate redundant temporaries in FNAME(fetch)
  KVM: MMU: Validate all gptes during fetch, not just those used for new pages
  KVM: MMU: Simplify spte fetch() function
  KVM: MMU: Add gpte_valid() helper
  KVM: MMU: Add validate_direct_spte() helper
  KVM: MMU: Add drop_large_spte() helper
  KVM: MMU: Use __set_spte to link shadow pages
  ...
2010-08-04 10:43:01 -07:00
Linus Torvalds
fe445c6e2c Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input: (57 commits)
  Input: adp5588-keypad - fix NULL dereference in adp5588_gpio_add()
  Input: cy8ctmg110 - capacitive touchscreen support
  Input: keyboard - also match braille-only keyboards
  Input: adp5588-keys - export unused GPIO pins
  Input: xpad - add product ID for Hori Fighting Stick EX2
  Input: adxl34x - fix leak and use after free
  Input: samsung-keypad - Add samsung keypad driver
  Input: i8042 - reset keyboard controller wehen resuming from S2R
  Input: synaptics - set min/max for finger width
  Input: synaptics - only report width on hardware that supports it
  Input: evdev - signal that device is writable in evdev_poll()
  Input: mousedev - signal that device is writable in mousedev_poll()
  Input: change input handlers to use bool when possible
  Input: document the MT event slot protocol
  Input: introduce MT event slots
  Input: usbtouchscreen - implement reset_resume
  Input: usbtouchscreen - implement runtime power management
  Input: usbtouchscreen - implement basic suspend/resume
  Input: Add ATMEL QT602240 touchscreen driver
  Input: fix signedness warning in input_set_keycode()
  ...
2010-08-04 10:41:52 -07:00
Linus Torvalds
f63b759c44 Merge branch 'v4l_for_2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6
* 'v4l_for_2.6.35' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-2.6: (243 commits)
  V4L/DVB: sms: Convert IR support to use the Remote Controller core
  V4L/DVB: sms: properly initialize IR phys and IR name
  V4L/DVB: standardize names at rc-dib0700 tables
  V4L/DVB: smsusb: enable IR port for Hauppauge WinTV MiniStick
  V4L/DVB: dib0700: Fix RC protocol logic to properly handle NEC/NECx and RC-5
  V4L/DVB: dib0700: properly implement IR change_protocol
  V4L/DVB: dib0700: break keytable into NEC and RC-5 variants
  V4L/DVB: dib0700: avoid bad repeat
  V4L/DVB: Port dib0700 to rc-core
  V4L/DVB: Add a keymap file with dib0700 table
  V4L/DVB: dvb-usb: add support for rc-core mode
  V4L/DVB: dvb-usb: prepare drivers for using rc-core
  V4L/DVB: dvb-usb: get rid of struct dvb_usb_rc_key
  V4L/DVB: rj54n1cb0c: fix a comment in the driver
  V4L/DVB: V4L2: sh_vou: VOU does support the full PAL resolution too
  V4L/DVB: V4L2: sh_mobile_camera_ceu: add support for CSI2
  V4L/DVB: V4L2: soc-camera: add a MIPI CSI-2 driver for SH-Mobile platforms
  V4L/DVB: V4L2: soc-camera: export soc-camera bus type for notifications
  V4L/DVB: V4L2: mediabus: add 12-bit Bayer and YUV420 pixel formats
  V4L/DVB: mediabus: fix ambiguous pixel code names
  ...
2010-08-04 10:38:08 -07:00
Linus Torvalds
be82ae0238 Merge branch 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm
* 'devel' of master.kernel.org:/home/rmk/linux-2.6-arm: (291 commits)
  ARM: AMBA: Add pclk support to AMBA bus infrastructure
  ARM: 6278/2: fix regression in RealView after the introduction of pclk
  ARM: 6277/1: mach-shmobile: Allow users to select HZ, default to 128
  ARM: 6276/1: mach-shmobile: remove duplicate NR_IRQS_LEGACY
  ARM: 6246/1: mmci: support larger MMCIDATALENGTH register
  ARM: 6245/1: mmci: enable hardware flow control on Ux500 variants
  ARM: 6244/1: mmci: add variant data and default MCICLOCK support
  ARM: 6243/1: mmci: pass power_mode to the translate_vdd callback
  ARM: 6274/1: add global control registers definition header file for nuc900
  mx2_camera: fix type of dma buffer virtual address pointer
  mx2_camera: Add soc_camera support for i.MX25/i.MX27
  arm/imx/gpio: add spinlock protection
  ARM: Add support for the LPC32XX arch
  ARM: LPC32XX: Arch config menu supoport and makefiles
  ARM: LPC32XX: Phytec 3250 platform support
  ARM: LPC32XX: Misc support functions
  ARM: LPC32XX: Serial support code
  ARM: LPC32XX: System suspend support
  ARM: LPC32XX: GPIO, timer, and IRQ drivers
  ARM: LPC32XX: Clock driver
  ...
2010-08-03 14:31:24 -07:00
Dave Jones
9d1f44ee20 [CPUFREQ] Remove pointless printk from p4-clockmod.
The only machines this is triggering on should be supported by
acpi-cpufreq or acpi's internal throttling.

Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:30 -04:00
Holger Freyther
307069cf6c [CPUFREQ] Fix section mismatch for powernow_cpu_init in powernow-k7.c
Use __cpuinit instead of __init for the cpufreq_driver
init function like it is done in powernow-k8.c.

This is removing the warning generated when compiling with
the CONFIG_DEBUG_SECTION_MISMATCH=y option.

Signed-off-by: Holger Hans Peter Freyther <holger@moiji-mobile.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:06 -04:00
Holger Freyther
2530573e45 [CPUFREQ] Fix section mismatch for longhaul_cpu_init.
Use __cpuinit instead of __init for the cpufreq_driver
init function like it is done in powernow-k8.c. Use the
__cpuinitdata for data used by the routines marked as __cpuinit.

This is removing the warning generated when compiling with
the CONFIG_DEBUG_SECTION_MISMATCH=y option.

Signed-off-by: Holger Hans Peter Freyther <holger@moiji-mobile.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:06 -04:00
Holger Freyther
7e2d811220 [CPUFREQ] Fix section mismatch for longrun_cpu_init.
Use __cpuinit instead of __init for the cpufreq_driver
init function like it is done in powernow-k8.c.

This is removing the warning generated when compiling with
the CONFIG_DEBUG_SECTION_MISMATCH=y option.

Signed-off-by: Holger Hans Peter Freyther <holger@moiji-mobile.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:06 -04:00
Borislav Petkov
b30d3304c9 [CPUFREQ] powernow-k8: Fix misleading variable naming
rdmsr() takes the lower 32 bits as a second argument and the high 32 as
a third. Fix the names accordingly since they were swapped.

There should be no functionality change resulting from this patch.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:06 -04:00
Peter Huewe
55c789bb2b [CPUFREQ] Convert pci_table entries to PCI_VDEVICE (if PCI_ANY_ID is used)
This patch converts pci_table entries, where .subvendor=PCI_ANY_ID and
.subdevice=PCI_ANY_ID, .class=0 and .class_mask=0, to use the
PCI_VDEVICE macro, and thus improves readability.

Signed-off-by: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:05 -04:00
Kulikov Vasiliy
ccc5638a20 [CPUFREQ] arch/x86/kernel/cpu/cpufreq: use for_each_pci_dev()
Use for_each_pci_dev() to simplify the code.

Signed-off-by: Kulikov Vasiliy <segooon@gmail.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:05 -04:00
Thomas Renninger
6f4f2723d0 [CPUFREQ] x86 cpufreq: Make trace_power_frequency cpufreq driver independent
and fix the broken case if a core's frequency depends on others.

trace_power_frequency was only implemented in a rather ungeneric way
in acpi-cpufreq driver's target() function only.
-> Move the call to trace_power_frequency to
   cpufreq.c:cpufreq_notify_transition() where CPUFREQ_POSTCHANGE
   notifier is triggered.
   This will support power frequency tracing by all cpufreq drivers

trace_power_frequency did not trace frequency changes correctly when
the userspace governor was used or when CPU cores' frequency depend
on each other.
-> Moving this into the CPUFREQ_POSTCHANGE notifier and pass the cpu
   which gets switched automatically fixes this.

Robert Schoene provided some important fixes on top of my initial
quick shot version which are integrated in this patch:
- Forgot some changes in power_end trace (TP_printk/variable names)
- Variable dummy in power_end must now be cpu_id
- Use static 64 bit variable instead of unsigned int for cpu_id

Signed-off-by: Thomas Renninger <trenn@suse.de>
CC: davej@redhat.com
CC: arjan@infradead.org
CC: linux-kernel@vger.kernel.org
CC: robert.schoene@tu-dresden.de
Tested-by: robert.schoene@tu-dresden.de
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:05 -04:00
Thomas Renninger
6b72e3934b [CPUFREQ] acpi-cpufreq: Fix CPU_ANY CPUFREQ_{PRE,POST}CHANGE notification
Signed-off-by: Thomas Renninger <trenn@suse.de>
CC: venki@google.com
CC: davej@redhat.com
CC: arjan@infradead.org
CC: linux-kernel@vger.kernel.org
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:05 -04:00
Marti Raudsepp
298decfbc4 [CPUFREQ] powernow-k8: On load failure, remind the user to enable support in BIOS setup
On Wed, 2010-01-20 at 16:56 +0100, Thomas Renninger wrote:
> But most often this happens if people upgrade their CPU and do not
> update their BIOS.
> Or the vendor does not recognise the new CPU even if the BIOS got
> updated.

Maybe some of those people just didn't realize it was disabled in BIOS?
If you tell users that it's a firmware bug then they'll probably just
give up.

> The itself message might be an enhancment, IMO it's not worth a patch.

Why do you think so? I spent an hour on hunting down the BIOS upgrade,
only to find that it didn't improve anything. It was a day later that I
realized that it might be a BIOS option; and the option was literally
the _last_ option in the whole BIOS setup. :)

This message would have saved the day.

> But do not revert the FW_BUG part!

Sure, you have a point here.

How about this patch?
2010-08-03 13:47:04 -04:00
Borislav Petkov
c2f4a2c6e0 [CPUFREQ] powernow-k8: Limit Pstate transition latency check
The Pstate transition latency check was added for broken F10h BIOSen
which wrongly contain a value of 0 for transition and bus master
latency. Fam11h and later, however, (will) have similar transition
latency so extend that behavior for them too.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:03 -04:00
Matthew Garrett
6ebdf777ba [CPUFREQ] Fix PCC driver error path
The PCC cpufreq driver unmaps the mailbox address range if any CPUs fail to
initialise, but doesn't do anything to remove the registered CPUs from the
cpufreq core resulting in failures further down the line. We're better off
simply returning a failure - the cpufreq core will unregister us cleanly if
we end up with no successfully registered CPUs. Tidy up the failure path
and also add a sanity check to ensure that the firmware gives us a realistic
frequency - the core deals badly with that being set to 0.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:02 -04:00
Daniel J Blueman
0d9715d64f [CPUFREQ] fix double freeing in error path of pcc-cpufreq
Prevent double freeing on error path.

Signed-off-by: Daniel J Blueman <daniel.blueman@gmail.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:02 -04:00
Matthew Garrett
5d77b85458 [CPUFREQ] pcc driver should check for pcch method before calling _OSC
The pcc specification documents an _OSC method that's incompatible with the
one defined as part of the ACPI spec. This shouldn't be a problem as both
are supposed to be guarded with a UUID. Unfortunately approximately nobody
(including HP, who wrote this spec) properly check the UUID on entry to the
_OSC call. Right now this could result in surprising behaviour if the pcc
driver performs an _OSC call on a machine that doesn't implement the pcc
specification. Check whether the PCCH method exists first in order to reduce
this probability.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Cc: Naga Chumbalkar <nagananda.chumbalkar@hp.com>
Signed-off-by: Dave Jones <davej@redhat.com>
2010-08-03 13:47:02 -04:00
Borislav Petkov
98a5ae2d99 x86, mce: Notify about corrected events too
Notify all parties registered on the mce decoder chain about logged
correctable MCEs.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Acked-by: Doug Thompson <dougthompson@xmission.com>
Acked-by: Ingo Molnar <mingo@elte.hu>
2010-08-03 16:14:02 +02:00
Sreedhara DS
804f8681a9 Remove indirect read write api support.
The firmware of production devices does not support this interface so this
is dead code.

Signed-off-by: Sreedhara DS <sreedhara.ds@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
2010-08-03 09:50:30 -04:00
Feng Tang
35f2915c3b intel_scu_ipc: add definitions for vRTC related command
Signed-off-by: Feng Tang <feng.tang@intel.com>
Signed-off-by: Alan Cox <alan@linux.intel.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
2010-08-03 09:48:47 -04:00
Dmitry Torokhov
d01d0756f7 Merge branch 'next' into for-linus 2010-08-02 18:35:17 -07:00
Guennadi Liakhovetski
ace6e9799f V4L/DVB: mediabus: fix ambiguous pixel code names
Endianness notation is meaningless for 8 bit YUYV codes. Switch pixel code
names to explicitly state the order of colour components in the data
stream.

Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
2010-08-02 16:43:36 -03:00
Avi Kivity
3444d7da18 KVM: VMX: Fix host GDT.LIMIT corruption
vmx does not restore GDT.LIMIT to the host value, instead it sets it to 64KB.
This means host userspace can learn a few bits of host memory.

Fix by reloading GDTR when we load other host state.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 08:10:18 +03:00
Xiao Guangrong
9a3aad7057 KVM: MMU: using __xchg_spte more smarter
Sometimes, atomically set spte is not needed, this patch call __xchg_spte()
more smartly

Note: if the old mapping's access bit is already set, we no need atomic operation
since the access bit is not lost

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-08-02 06:41:01 +03:00
Xiao Guangrong
e4b502ead2 KVM: MMU: cleanup spte set and accssed/dirty tracking
Introduce set_spte_track_bits() to cleanup current code

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-08-02 06:41:00 +03:00
Xiao Guangrong
be233d49ea KVM: MMU: don't atomicly set spte if it's not present
If the old mapping is not present, the spte.a is not lost, so no need
atomic operation to set it

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-08-02 06:40:59 +03:00
Xiao Guangrong
9ed5520dd3 KVM: MMU: fix page dirty tracking lost while sync page
In sync-page path, if spte.writable is changed, it will lose page dirty
tracking, for example:

assume spte.writable = 0 in a unsync-page, when it's synced, it map spte
to writable(that is spte.writable = 1), later guest write spte.gfn, it means
spte.gfn is dirty, then guest changed this mapping to read-only, after it's
synced,  spte.writable = 0

So, when host release the spte, it detect spte.writable = 0 and not mark page
dirty

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-08-02 06:40:58 +03:00
Xiao Guangrong
daa3db693c KVM: MMU: fix broken page accessed tracking with ept enabled
In current code, if ept is enabled(shadow_accessed_mask = 0), the page
accessed tracking is lost.

Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-08-02 06:40:57 +03:00
Xiao Guangrong
fa1de2bfc0 KVM: MMU: add missing reserved bits check in speculative path
In the speculative path, we should check guest pte's reserved bits just as
the real processor does

Reported-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-08-02 06:40:56 +03:00
Andrea Arcangeli
6e3e243c3b KVM: MMU: fix mmu notifier invalidate handler for huge spte
The index wasn't calculated correctly (off by one) for huge spte so KVM guest
was unstable with transparent hugepages.

Signed-off-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-08-02 06:40:54 +03:00
Wei Yongjun
c19b8bd60e KVM: x86 emulator: fix xchg instruction emulation
If the destination is a memory operand and the memory cannot
map to a valid page, the xchg instruction emulation and locked
instruction will not work on io regions and stuck in endless
loop. We should emulate exchange as write to fix it.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:53 +03:00
Gleb Natapov
9195c4da26 KVM: x86: Call mask notifiers from pic
If pit delivers interrupt while pic is masking it OS will never do EOI
and ack notifier will not be called so when pit will be unmasked no pit
interrupts will be delivered any more. Calling mask notifiers solves this
issue.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:52 +03:00
Gleb Natapov
68be080345 KVM: x86: never re-execute instruction with enabled tdp
With tdp enabled we should get into emulator only when emulating io, so
reexecution will always bring us back into emulator.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:51 +03:00
Gleb Natapov
c0e0608cb9 KVM: x86: emulator: inc/dec can have lock prefix
Mark inc (0xfe/0 0xff/0) and dec (0xfe/1 0xff/1) as lock prefix capable.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:49 +03:00
Avi Kivity
24157aaf83 KVM: MMU: Eliminate redundant temporaries in FNAME(fetch)
'level' and 'sptep' are aliases for 'interator.level' and 'iterator.sptep', no
need for them.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:48 +03:00
Avi Kivity
5991b33237 KVM: MMU: Validate all gptes during fetch, not just those used for new pages
Currently, when we fetch an spte, we only verify that gptes match those that
the walker saw if we build new shadow pages for them.

However, this misses the following race:

  vcpu1            vcpu2

  walk
                  change gpte
                  walk
                  instantiate sp

  fetch existing sp

Fix by validating every gpte, regardless of whether it is used for building
a new sp or not.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:47 +03:00
Avi Kivity
0b3c933302 KVM: MMU: Simplify spte fetch() function
Partition the function into three sections:

- fetching indirect shadow pages (host_level > guest_level)
- fetching direct shadow pages (page_level < host_level <= guest_level)
- the final spte (page_level == host_level)

Instead of the current spaghetti.

A slight change from the original code is that we call validate_direct_spte()
more often: previously we called it only for gw->level, now we also call it for
lower levels.  The change should have no effect.

[xiao: fix regression caused by validate_direct_spte() called too late]

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:45 +03:00
Avi Kivity
39c8c672a1 KVM: MMU: Add gpte_valid() helper
Move the code to check whether a gpte has changed since we fetched it into
a helper.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:44 +03:00
Avi Kivity
a357bd229c KVM: MMU: Add validate_direct_spte() helper
Add a helper to verify that a direct shadow page is valid wrt the required
access permissions; drop the page if it is not valid.

Reviewed-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:43 +03:00
Avi Kivity
a3aa51cfaa KVM: MMU: Add drop_large_spte() helper
To clarify spte fetching code, move large spte handling into a helper.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:42 +03:00
Avi Kivity
121eee97a7 KVM: MMU: Use __set_spte to link shadow pages
To avoid split accesses to 64 bit sptes on i386, use __set_spte() to link
shadow pages together.

(not technically required since shadow pages are __GFP_KERNEL, so upper 32
bits are always clear)

Reviewed-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:41 +03:00
Avi Kivity
32ef26a359 KVM: MMU: Add link_shadow_page() helper
To simplify the process of fetching an spte, add a helper that links
a shadow page to an spte.

Reviewed-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:40 +03:00
Avi Kivity
908e75f3e7 KVM: Expose MCE control MSRs to userspace
Userspace needs to reset and save/restore these MSRs.

The MCE banks are not exposed since their number varies from vcpu to vcpu.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-08-02 06:40:36 +03:00