Merge tag 'v4.9-rc3' into xtensa-for-next

Linux 4.9-rc3

Merge tag 'irqchip-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core

Merge the first drop of irqchip updates for 4.9 from Marc Zyngier:

- ACPI IORT core code
-

Merge tag 'irqchip-4.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into irq/core

Merge the first drop of irqchip updates for 4.9 from Marc Zyngier:

- ACPI IORT core code
- IORT support for the GICv3 ITS
- A few of GIC cleanups

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Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next-queued

Backmerge because too many conflicts, and also we need to get at the
latest struct fence patches from Gustavo. Requested by

Merge remote-tracking branch 'airlied/drm-next' into drm-intel-next-queued

Backmerge because too many conflicts, and also we need to get at the
latest struct fence patches from Gustavo. Requested by Chris Wilson.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

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Merge branch 'linus' into locking/urgent, to pick up fixes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from David Vrabel:
"Features and fixes for 4.8-rc0:

- ACPI support for guests on ARM

Merge tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from David Vrabel:
"Features and fixes for 4.8-rc0:

- ACPI support for guests on ARM platforms.
- Generic steal time support for arm and x86.
- Support cases where kernel cpu is not Xen VCPU number (e.g., if
in-guest kexec is used).
- Use the system workqueue instead of a custom workqueue in various
places"

* tag 'for-linus-4.8-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (47 commits)
xen: add static initialization of steal_clock op to xen_time_ops
xen/pvhvm: run xen_vcpu_setup() for the boot CPU
xen/evtchn: use xen_vcpu_id mapping
xen/events: fifo: use xen_vcpu_id mapping
xen/events: use xen_vcpu_id mapping in events_base
x86/xen: use xen_vcpu_id mapping when pointing vcpu_info to shared_info
x86/xen: use xen_vcpu_id mapping for HYPERVISOR_vcpu_op
xen: introduce xen_vcpu_id mapping
x86/acpi: store ACPI ids from MADT for future usage
x86/xen: update cpuid.h from Xen-4.7
xen/evtchn: add IOCTL_EVTCHN_RESTRICT
xen-blkback: really don't leak mode property
xen-blkback: constify instance of "struct attribute_group"
xen-blkfront: prefer xenbus_scanf() over xenbus_gather()
xen-blkback: prefer xenbus_scanf() over xenbus_gather()
xen: support runqueue steal time on xen
arm/xen: add support for vm_assist hypercall
xen: update xen headers
xen-pciback: drop superfluous variables
xen-pciback: short-circuit read path used for merging write values
...

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x86/xen: update cpuid.h from Xen-4.7

Update cpuid.h header from xen hypervisor tree to get
XEN_HVM_CPUID_VCPU_ID_PRESENT definition.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off

x86/xen: update cpuid.h from Xen-4.7

Update cpuid.h header from xen hypervisor tree to get
XEN_HVM_CPUID_VCPU_ID_PRESENT definition.

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

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Merge remote-tracking branch 'linusw-gpio/for-next' into devm_gpiochip

Base for demv_gpiochip_add_data() and devm_gpiochip_remove().

Merge branch 'next' into for-linus

Prepare first round of input updates for 3.20.

Merge tag 'v3.19-rc4' into next

Merge with mainline to bring in the latest thermal and other changes.

Merge tag 'topic/i915-hda-componentized-2015-01-12' into drm-intel-next-queued

Conflicts:
drivers/gpu/drm/i915/intel_runtime_pm.c

Separate branch so that Takashi can also pull just this refactorin

Merge tag 'topic/i915-hda-componentized-2015-01-12' into drm-intel-next-queued

Conflicts:
drivers/gpu/drm/i915/intel_runtime_pm.c

Separate branch so that Takashi can also pull just this refactoring
into sound-next.

Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>

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Merge tag 'irqchip-urgent-3.19' of git://git.infradead.org/users/jcooper/linux into irq/urgent

irqchip urgent fixes for v3.19 from Jason Cooper
- mtk-sysirq: Fix error handling
- hip04: Fix cpu ma

Merge tag 'irqchip-urgent-3.19' of git://git.infradead.org/users/jcooper/linux into irq/urgent

irqchip urgent fixes for v3.19 from Jason Cooper
- mtk-sysirq: Fix error handling
- hip04: Fix cpu map for 16bit value
- gic-v3-its: Clear a warning regarding decimal constants
- omap-intc: Fix legacy DMA regression
- atmel-aic-common: Retain priority when changing type

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Merge tag 'mvebu-fixes-3.19' of git://git.infradead.org/linux-mvebu into fixes

Pull "Fixes for 3.19" from Andrew Lunn:

Jason is taking a back seat this cycle and i'm doing all the patch
wrangling f

Merge tag 'mvebu-fixes-3.19' of git://git.infradead.org/linux-mvebu into fixes

Pull "Fixes for 3.19" from Andrew Lunn:

Jason is taking a back seat this cycle and i'm doing all the patch
wrangling for mvebu.

* tag 'mvebu-fixes-3.19' of git://git.infradead.org/linux-mvebu:
ARM: mvebu: Fix pinctrl configuration for Armada 370 DB

Also update to Linux 3.19-rc1, which this was based on.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>

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Merge tag 'stable/for-linus-3.19-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen features and fixes from David Vrabel:

- Fully support non-coherent devices on ARM by int

Merge tag 'stable/for-linus-3.19-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen features and fixes from David Vrabel:

- Fully support non-coherent devices on ARM by introducing the
mechanisms to request the hypervisor to perform the required cache
maintainance operations.

- A number of pciback bug fixes and cleanups. Notably a deadlock fix
if a PCI device was manually uunbound and a fix for incorrectly
restoring state after a function reset.

- In x86 PVHVM guests, use the APIC for interrupts if this has been
virtualized by the hardware. This reduces the number of interrupt-
related VM exits on such hardware.

* tag 'stable/for-linus-3.19-rc0-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip: (26 commits)
Revert "swiotlb-xen: pass dev_addr to swiotlb_tbl_unmap_single"
xen/pci: Use APIC directly when APIC virtualization hardware is available
xen/pci: Defer initialization of MSI ops on HVM guests
xen-pciback: drop SR-IOV VFs when PF driver unloads
xen/pciback: Restore configuration space when detaching from a guest.
PCI: Expose pci_load_saved_state for public consumption.
xen/pciback: Remove tons of dereferences
xen/pciback: Print out the domain owning the device.
xen/pciback: Include the domain id if removing the device whilst still in use
driver core: Provide an wrapper around the mutex to do lockdep warnings
xen/pciback: Don't deadlock when unbinding.
swiotlb-xen: pass dev_addr to swiotlb_tbl_unmap_single
swiotlb-xen: call xen_dma_sync_single_for_device when appropriate
swiotlb-xen: remove BUG_ON in xen_bus_to_phys
swiotlb-xen: pass dev_addr to xen_dma_unmap_page and xen_dma_sync_single_for_cpu
xen/arm: introduce GNTTABOP_cache_flush
xen/arm/arm64: introduce xen_arch_need_swiotlb
xen/arm/arm64: merge xen/mm32.c into xen/mm.c
xen/arm: use hypercall to flush caches in map_page
xen: add a dma_addr_t dev_addr argument to xen_dma_map_page
...

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xen/pci: Use APIC directly when APIC virtualization hardware is available

When hardware supports APIC/x2APIC virtualization we don't need to use
pirqs for MSI handling and instead use APIC since mos

xen/pci: Use APIC directly when APIC virtualization hardware is available

When hardware supports APIC/x2APIC virtualization we don't need to use
pirqs for MSI handling and instead use APIC since most APIC accesses
(MMIO or MSR) will now be processed without VMEXITs.

As an example, netperf on the original code produces this profile
(collected wih 'xentrace -e 0x0008ffff -T 5'):

342 cpu_change
260 CPUID
34638 HLT
64067 INJ_VIRQ
28374 INTR
82733 INTR_WINDOW
10 NPF
24337 TRAP
370610 vlapic_accept_pic_intr
307528 VMENTRY
307527 VMEXIT
140998 VMMCALL
127 wrap_buffer

After applying this patch the same test shows

230 cpu_change
260 CPUID
36542 HLT
174 INJ_VIRQ
27250 INTR
222 INTR_WINDOW
20 NPF
24999 TRAP
381812 vlapic_accept_pic_intr
166480 VMENTRY
166479 VMEXIT
77208 VMMCALL
81 wrap_buffer

ApacheBench results (ab -n 10000 -c 200) improve by about 10%

Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: David Vrabel <david.vrabel@citrix.com>

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