mark gross 5e0d2a6fc0 PCI: iommu: iotlb flushing ...

This patch is for batching up the flushing of the IOTLB for the DMAR
implementation found in the Intel VT-d hardware.  It works by building a list
of to be flushed IOTLB entries and a bitmap list of which DMAR engine they are
from.

After either a high water mark (250 accessible via debugfs) or 10ms the list
of iova's will be reclaimed and the DMAR engines associated are IOTLB-flushed.

This approach recovers 15 to 20% of the performance lost when using the IOMMU
for my netperf udp stream benchmark with small packets.  It can be disabled
with a kernel boot parameter "intel_iommu=strict".

Its use does weaken the IOMMU protections a bit.

Signed-off-by: Mark Gross <mgross@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

2008-04-20 21:47:07 -07:00

..

hotplug

PCI Hotplug: the ibm driver is not dependant on PCI_LEGACY

2008-04-20 21:46:57 -07:00

pcie

PCI: add PCI Express ASPM support

2008-04-20 21:47:03 -07:00

.gitignore

Add some basic .gitignore files

2005-10-18 08:26:15 -07:00

access.c

[PATCH] severing module.h->sched.h

2006-12-04 02:00:22 -05:00

bus.c

PCI: remove global list of PCI devices

2008-04-20 21:47:02 -07:00

dmar.c

copyright owner and author clean up for intel iommu and related files

2008-02-23 17:12:14 -08:00

hotplug-pci.c

PCI: fix section mismatch warning in pci_scan_child_bus

2008-03-04 15:07:03 -08:00

hotplug.c

Driver core: change add_uevent_var to use a struct

2007-10-12 14:51:01 -07:00

htirq.c

PCI: Use pci_find_ht_capability() in drivers/pci/htirq.c

2006-12-20 10:54:42 -08:00

intel-iommu.c

PCI: iommu: iotlb flushing

2008-04-20 21:47:07 -07:00

intel-iommu.h

copyright owner and author clean up for intel iommu and related files

2008-02-23 17:12:14 -08:00

iova.c

PCI: iova RB tree setup tweak

2008-04-20 21:47:06 -07:00

iova.h

PCI: iommu: iotlb flushing

2008-04-20 21:47:07 -07:00

Kconfig

PCI: Add Kconfig option to disable deprecated pci_find_* API

2007-11-05 13:35:17 -08:00

Makefile

mn10300: add the MN10300/AM33 architecture to the kernel

2008-02-08 09:22:30 -08:00

msi.c

PCI: drivers/pci/msi.c: move arch hooks to the top

2008-02-01 15:04:25 -08:00

msi.h

PCI: Make some MSI-X #defines generic

2006-12-01 14:36:56 -08:00

pci-acpi.c

ACPI: acpi_pci_set_power_state() cleanups

2008-02-23 01:29:34 -05:00

pci-driver.c

PCI: Mem Policy: fix mempolicy usage in pci driver

2008-02-01 15:04:20 -08:00

pci-sysfs.c

PCI: add PCI Express ASPM support

2008-04-20 21:47:03 -07:00

pci.c

PCI: add PCI Express ASPM support

2008-04-20 21:47:03 -07:00

pci.h

PCI: make pci_bus a struct device

2008-02-01 15:04:31 -08:00

probe.c

PCI: add PCI Express ASPM support

2008-04-20 21:47:03 -07:00

proc.c

PCI: Fix wrong reference counter check for proc_dir_entry

2008-02-21 15:34:39 -08:00

quirks.c

PCI: simplify quirk debug output

2008-04-20 21:47:06 -07:00

remove.c

PCI: add PCI Express ASPM support

2008-04-20 21:47:03 -07:00

rom.c

docbook: fix kernel-api source files

2008-03-03 10:47:14 -08:00

search.c

PCI: clean up search.c a lot

2008-04-20 21:46:54 -07:00

setup-bus.c

Revert "PCI: remove transparent bridge sizing"

2008-03-26 11:22:40 -07:00

setup-irq.c

kobjects: fix up improper use of the kobject name field

2007-10-12 14:51:02 -07:00

setup-res.c

PCI: add generic pci_enable_resources()

2008-04-20 21:47:04 -07:00

syscall.c

PCI: remove unneeded lock_kernel() in drivers/pci/syscall.c.

2008-02-01 15:04:21 -08:00