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Alex Williamson 033291eccb vfio: Include No-IOMMU mode 
There is really no way to safely give a user full access to a DMA
capable device without an IOMMU to protect the host system.  There is
also no way to provide DMA translation, for use cases such as device
assignment to virtual machines.  However, there are still those users
that want userspace drivers even under those conditions.  The UIO
driver exists for this use case, but does not provide the degree of
device access and programming that VFIO has.  In an effort to avoid
code duplication, this introduces a No-IOMMU mode for VFIO.

This mode requires building VFIO with CONFIG_VFIO_NOIOMMU and enabling
the "enable_unsafe_noiommu_mode" option on the vfio driver.  This
should make it very clear that this mode is not safe.  Additionally,
CAP_SYS_RAWIO privileges are necessary to work with groups and
containers using this mode.  Groups making use of this support are
named /dev/vfio/noiommu-$GROUP and can only make use of the special
VFIO_NOIOMMU_IOMMU for the container.  Use of this mode, specifically
binding a device without a native IOMMU group to a VFIO bus driver
will taint the kernel and should therefore not be considered
supported.  This patch includes no-iommu support for the vfio-pci bus
driver only.

Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
 		2015-11-04 09:56:16 -07:00
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accessibility
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acpi ACPICA: Tables: Fix FADT dependency regression 2015-10-14 22:48:13 +02:00
amba
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android mm: mark most vm_operations_struct const 2015-09-10 13:29:01 -07:00
ata Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus 2015-09-03 16:55:55 -07:00
atm solos-pci: Increase headroom on received packets 2015-09-17 21:29:07 -07:00
auxdisplay
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base mm: cma: fix incorrect type conversion for size during dma allocation 2015-10-23 17:55:10 +09:00
bcma
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block Merge branch 'for-linus' of git://git.kernel.dk/linux-block 2015-10-24 07:20:57 +09:00
bluetooth Bluetooth: hci_bcm: Fix crash on suspend 2015-08-28 21:09:14 +02:00
bus bus: arm-ccn: Fix irq affinity setting on CPU migration 2015-10-15 17:10:15 +02:00
cdrom
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char Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-09-26 21:05:23 -04:00
clk Partially revert "clk: mvebu: Convert to clk_hw based provider APIs" 2015-10-14 11:28:17 -07:00
clocksource clocksource/drivers/keystone: Fix bad NO_IRQ usage 2015-09-29 14:33:51 +02:00
connector
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cpufreq cpufreq: intel_pstate: Fix divide by zero on Knights Landing (KNL) 2015-10-15 22:46:33 +02:00
cpuidle Additional power management and ACPI material for v4.3-rc1 2015-09-11 19:11:06 -07:00
crypto Merge git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6 2015-09-26 21:05:23 -04:00
dca
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devfreq PM / devfreq: fix double kfree 2015-10-02 11:05:58 +09:00
dio
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dma dmaengine fixes for 4.3-rc4 2015-10-02 14:46:15 -04:00
dma-buf
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edac edac updates for v4.3-rc1 2015-09-11 16:21:12 -07:00
eisa
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extcon extcon: Fix attached value returned by is_extcon_changed 2015-09-21 15:07:19 +09:00
firewire
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firmware arm64/efi: Fix boot crash by not padding between EFI_MEMORY_RUNTIME regions 2015-10-01 12:51:28 +02:00
fmc
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gpio Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-09-18 08:11:42 -07:00
gpu Merge branch 'drm-fixes-4.3' of git://people.freedesktop.org/~agd5f/linux into drm-fixes 2015-10-22 10:24:55 +10:00
hid Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-09-04 12:02:11 -07:00
hsi mm: mark most vm_operations_struct const 2015-09-10 13:29:01 -07:00
hv Drivers: hv: vmbus: fix init_vp_index() for reloading hv_netvsc 2015-09-20 22:44:51 -07:00
hwmon hwmon: (pwm-fan) Fix module autoload for OF platform driver 2015-09-20 17:50:19 -07:00
hwspinlock
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hwtracing/coresight
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i2c i2c: designware: Do not use parameters from ACPI on Dell Inspiron 7348 2015-10-18 14:11:08 +02:00
ide
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idle intel_idle: Skylake Client Support - updated 2015-09-10 14:03:44 -04:00
iio iio: st_accel: fix interrupt handling on LIS3LV02 2015-10-03 10:27:18 +01:00
infiniband Changes for 4.3-rc6 2015-10-24 07:28:05 +09:00
input Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input 2015-10-16 17:39:27 -07:00
iommu Merge tag 'for-linus-20151021' of git://git.infradead.org/intel-iommu 2015-10-22 06:32:48 +09:00
ipack
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irqchip Merge branch 'irq-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 2015-10-04 11:40:09 +01:00
isdn libnvdimm for 4.3: 2015-09-08 14:35:59 -07:00
leds leds:lp55xx: Correct Kconfig dependency for f/w user helper 2015-09-17 10:02:20 +02:00
lguest
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macintosh powerpc updates for 4.3 2015-09-03 16:41:38 -07:00
mailbox Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration 2015-09-05 18:11:04 -07:00
mcb mcb: Fix error handling in mcb_pci_probe() 2015-10-05 05:10:01 +01:00
md dm cache: the CLEAN_SHUTDOWN flag was not being set 2015-10-23 14:02:56 -04:00
media [media] m88ds3103: use own reg update_bits() implementation 2015-10-22 15:48:28 -02:00
memory memory: omap-gpmc: dump "before" state before first modification 2015-10-12 16:23:34 -07:00
memstick
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message mptfusion: prevent some memory corruption 2015-08-26 07:11:45 -07:00
mfd mfd: max77843: Fix max77843_chg_init() return on error 2015-10-01 16:31:42 +01:00
misc powerpc fixes for 4.3 #3 2015-10-16 12:07:43 -07:00
mmc mmc: core: Fix init_card in 52Mhz 2015-10-21 10:18:11 +02:00
mtd A few MTD fixes: 2015-10-07 09:35:15 +01:00
net net: bcmgenet: Fix early link interrupt enabling 2015-10-18 23:07:12 -07:00
nfc This is the bulk of GPIO changes for the v4.3 kernel cycle: 2015-09-04 10:07:45 -07:00
ntb NTB: Fix range check on memory window index 2015-09-07 15:27:12 -04:00
nubus
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nvdimm pmem: add proper fencing to pmem_rw_page() 2015-09-17 11:49:28 -04:00
nvmem nvmem: sunxi: Check for memory allocation failure 2015-10-04 12:09:43 +01:00
of Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2015-09-26 06:01:33 -04:00
oprofile
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parisc PCI: Revert "PCI: Call pci_read_bridge_bases() from core instead of arch code" 2015-09-15 13:18:04 -05:00
parport
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pci genirq/msi: Do not use pci_msi_[un]mask_irq as default methods 2015-10-16 12:40:43 +02:00
pcmcia pcmcia: soc_common: remove skt_dev_info's clk pointer 2015-09-03 16:01:03 +01:00
perf drivers/perf: arm_pmu: avoid CPU device_node reference leak 2015-10-15 17:11:23 +02:00
phy phy: berlin-sata: Fix module autoload for OF platform driver 2015-09-25 17:01:14 +05:30
pinctrl pinctrl: uniphier: fix input enable settings for PH1-sLD8 2015-10-02 04:06:26 -07:00
platform platform-drivers-x86 for 4.3-2 2015-09-17 21:41:02 -07:00
pnp
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power power supply and reset fixes for the v4.3 series 2015-09-17 12:25:42 -07:00
powercap powercap / RAPL: disable the 2nd power limit properly 2015-08-29 01:46:40 +02:00
pps
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ps3
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ptp
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pwm pwm: Changes for v4.3-rc1 2015-09-09 10:55:32 -07:00
rapidio
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ras
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regulator Merge remote-tracking branch 'regulator/fix/axp20x' into regulator-linus 2015-10-06 12:00:42 +01:00
remoteproc
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reset reset: ath79: Fix missing spin_lock_init 2015-09-01 14:48:40 +02:00
rpmsg
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rtc rtc: abx80x: fix RTC write bit 2015-09-05 19:37:31 +02:00
s390 virtio: fixes on top of 4.3-rc1 2015-09-18 09:28:20 -07:00
sbus
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scsi SCSI fixes on 20151010 2015-10-11 10:02:30 -07:00
sfi
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sh SH Drivers Updates for v4.3 2015-09-21 12:02:27 -07:00
sn
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soc genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
spi Merge remote-tracking branches 'spi/fix/davinci' and 'spi/fix/sh-msiof' into spi-linus 2015-10-07 11:43:39 +01:00
spmi genirq: Remove irq argument from irq flow handlers 2015-09-16 15:47:51 +02:00
ssb
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staging staging driver fixes for 4.3-rc7 2015-10-24 07:51:13 +09:00
target iscsi-target: Avoid OFMarker + IFMarker negotiation 2015-09-24 23:24:46 -07:00
tc
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thermal Samsung 2nd fixes for v4.3 2015-10-21 17:02:13 +02:00
thunderbolt thunderbolt: Allow loading of module on recent Apple MacBooks with thunderbolt 2 controller 2015-09-20 15:20:11 -07:00
tty Revert "serial: 8250_dma: don't bother DMA with small transfers" 2015-10-17 21:24:46 -07:00
uio
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usb xhci: Add spurious wakeup quirk for LynxPoint-LP controllers 2015-10-17 00:04:18 -07:00
uwb
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vfio vfio: Include No-IOMMU mode 2015-11-04 09:56:16 -07:00
vhost virtio: fixes on top of 4.3-rc1 2015-09-18 09:28:20 -07:00
video fbcon: initialize blink interval before calling fb_set_par 2015-10-17 22:00:39 -07:00
virt
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virtio virtio_balloon: do not change memory amount visible via /proc/meminfo 2015-09-08 13:32:11 +03:00
vlynq
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vme
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w1 Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial 2015-09-01 18:46:42 -07:00
watchdog watchdog: iTCO: Fix dependencies on I2C 2015-09-28 10:56:10 +02:00
xen Merge branch 'akpm' (patches from Andrew) 2015-09-10 18:19:42 -07:00
zorro
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Kconfig Merge branch 'for-linus' of git://ftp.arm.linux.org.uk/~rmk/linux-arm 2015-09-03 16:27:01 -07:00
Makefile This is the bulk of pin control changes for the v4.3 development 2015-09-04 10:22:09 -07:00