518752 Commits

Author SHA1 Message Date
Hans de Goede
0332e7dfe6 ARM: dts: sun5i: Add new Auxtek-t004 board
The auxtek-t004:
http://www.fasttech.com/products/1110/10004200/1318603-auxtek-t004-allwinner-a10s-single-core-android-ics

Is an Allwinner A10s based hdmi tv stick with with 512M RAM, 4G nand flash,
toc9002 (bcm43362) sdio wifi, 1 USB host ports using an USB-A receptacle and
a 2 micro-usb receptacles, one for power and one for USB OTG.

The sdio wifi appears to not have an oob irq hooked up, so we rely on sdio-irq
support for it.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:26 +02:00
Hans de Goede
e1fe9f8c0c ARM: dts: sun5i: Add mmc2 pinmux settings
Add A13 mmc2 pinmux settings, note these are for a 8bit bus.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:25 +02:00
Hans de Goede
3727ed3bb3 ARM: dts: sun5i: Stop using different compatibles for ehci/ohci on a13 vs a10s
The A13 and the A10s use the same die (this has been confirmed by Allwinner),
as such there is no need to differentiate between the ehci/ohci parts of both,
the only reasons there were different allwinner,sun5i-a*-foo compatible
between these 2 parts is costemetically and because we could when we still
had 2 completely different dtsi files.

The allwinner,sun5i-a*-foo compatible strings are not used for binding at all,
the actual driver binds to the generic-?hci compatible, so we can safely remove
this cosmetical difference and simplify the dtsi files.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:25 +02:00
Hans de Goede
cbc8107b3e ARM: dts: sun4i: Enable tablet keys on Chuwi V7 CW0825
Enable the lradc controlled tablet keys on the Chuwi V7 CW0825 tablet.

Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:25 +02:00
Chen-Yu Tsai
ef1ac7c963 ARM: dts: sun6i: hummingbird: Enable IR receiver
The A31 Hummingbird has an IR receiver.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:25 +02:00
Marcus Cooper
d3da93d479 ARM: sun6i: dt: Add new Mele I7 device
The Mele I7 is a Allwinner A31 based Android TV box, with 1G RAM,
8GB NAND flash, a RTL8188etv wifi chip, 3 USB Host ports using
USB-A receptacles, a micro USB-B receptacle for USB OTG, HDMI out,
a TRS connector for A/V, SPDIF and IrDA.

This patch adds basic support for the device, more information can
be found here (http://linux-sunxi.org/Mele_I7).

Signed-off-by: Marcus Cooper <codekipper@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:24 +02:00
Maxime Ripard
1e9d553093 ARM: sun8i: ippo q8h v5: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:24 +02:00
Maxime Ripard
1366e357f2 ARM: sun7i: pcduino3: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:24 +02:00
Maxime Ripard
581b19e559 ARM: sun7i: olinuxino micro: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:24 +02:00
Maxime Ripard
6bd0027ee1 ARM: sun7i: olinuxino lime2: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:23 +02:00
Maxime Ripard
5b178791a9 ARM: sun7i: olinuxino lime: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:23 +02:00
Maxime Ripard
22b10010cd ARM: sun7i: m3: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:23 +02:00
Maxime Ripard
598699d073 ARM: sun7i: i12 tvbox: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:23 +02:00
Maxime Ripard
9bb082547e ARM: sun7i: hummingbird: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:22 +02:00
Maxime Ripard
712a9fa2af ARM: sun7i: cubietruck: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:22 +02:00
Maxime Ripard
b5ec9938b5 ARM: sun7i: cubieboard2: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:22 +02:00
Maxime Ripard
d540b7cc69 ARM: sun7i: bananapi: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:22 +02:00
Maxime Ripard
ece44e41fa ARM: sun6i: m9: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:21 +02:00
Maxime Ripard
6f1b57f57d ARM: sun6i: colombus: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:21 +02:00
Maxime Ripard
df839aeb80 ARM: sun6i: app4 evb1: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:21 +02:00
Maxime Ripard
b2547166a6 ARM: sun5i: a13: olinuxino: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:21 +02:00
Maxime Ripard
c999303bfc ARM: sun5i: a13: olinuxino micro: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:21 +02:00
Maxime Ripard
f5d89ab5ba ARM: sun5i: a13: hsg h702: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:21 +02:00
Maxime Ripard
420e6f25df ARM: sun5i: a10s: r7 tv dongle: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:20 +02:00
Maxime Ripard
b96b3b224e ARM: sun5i: a10s: olinuxino micro: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:20 +02:00
Maxime Ripard
5e87736949 ARM: sun4i: pcduino: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:20 +02:00
Maxime Ripard
a86d26c85a ARM: sun4i: olinuxino lime: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:20 +02:00
Maxime Ripard
c2e046419f ARM: sun4i: mini xplus: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:20 +02:00
Maxime Ripard
82c8364b66 ARM: sun4i: inet97fv2: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:19 +02:00
Maxime Ripard
4218f450e8 ARM: sun4i: hackberry: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:19 +02:00
Maxime Ripard
8fd5cfc7e4 ARM: sun4i: cubieboard: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:19 +02:00
Maxime Ripard
b6ef4c2c66 ARM: sun4i: ba10 tvbox: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:19 +02:00
Maxime Ripard
84bdea6e5e ARM: sun4i: a1000: Convert to DT label based syntax
In order to lessen the amount of duplication of the DT tree, ease the
new and follow the trend that prefers to use label based references
when overriding DTSI nodes, convert the board to this syntax

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:19 +02:00
Maxime Ripard
903b2d7515 ARM: sun5i: a10s: Move to the common sun5i DTSI
Now that we have a common DTSI for the sun5i family, move the A10s to use it.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:18 +02:00
Maxime Ripard
51fbba4212 ARM: sun5i: a13: Move to the common sun5i DTSI
Now that we have a common DTSI for the sun5i family, move the A13 to use it.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:18 +02:00
Maxime Ripard
fbfa736772 ARM: sun5i: Add a DTSI common to A10s and A13
The A10s and the A13 are very similar SoCs, the only difference being the
number of pins and the number of devices available (number of UARTs, EMAC only
in the A10s, etc.), and the clocks and pinctrl functions obviously.

Create a common DTSI that will be included by the A10s and A13 DTSI, that will
add their SoC differences in there.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:18 +02:00
Chen-Yu Tsai
fa86885b6b ARM: dts: sun9i: Enable USB support on A80 Optimus board
On the Optimus board, all three USB hosts can be used.
HCI0 and HCI2 are available through the USB connector.
HCI1 is available with HSIC through 2 pins on the GPIO
expansion header.

This patch also adds a regulator for HCI2/USB3's VBUS.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:18 +02:00
Chen-Yu Tsai
70472163a7 ARM: dts: sun9i: Add USB host controller nodes to a80 dtsi
The A80 has 3 EHCI/OHCI USB controllers.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:18 +02:00
Maxime Ripard
c0188c40c2 ARM: sun7i: olinuxino micro: Relicense the device tree under GPLv2/X11
The current GPL only licensing on the DTSI makes it very impractical for other
software components licensed under another license.

In order to make it easier for them to reuse our device trees, relicense our
device trees under a GPL/X11 dual-license.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Carlo Caione <carlo@caione.org>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Zalan Blenessy <zalan.blenessy@gmail.com>
2015-04-27 08:20:17 +02:00
Chen-Yu Tsai
1af5d19269 ARM: dts: sun9i: Add usb phy nodes to a80 dtsi
On sun9i, there are 3 independent usb phys for EHCI/OHCI.
Add device nodes for them.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:17 +02:00
Chen-Yu Tsai
bc8ffc2de8 ARM: dts: sun9i: Add usb clock nodes to a80 dtsi
The USB controller and phy clocks and resets have a separate address
block and driver. Add the nodes to represent them.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:17 +02:00
Maxime Ripard
d67b984be9 ARM: sun7i: hummingbird: Relicense the device tree under GPLv2/X11
The current GPL only licensing on the DTSI makes it very impractical for other
software components licensed under another license.

In order to make it easier for them to reuse our device trees, relicense our
device trees under a GPL/X11 dual-license.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Wills Wang <wills.wang.open@gmail.com>
2015-04-27 08:20:17 +02:00
Adam Sampson
061035d456 ARM: dts: sun7i: Add dts file for pcDuino 3 Nano board
Add support for the LinkSprite pcDuino 3 Nano board. This is a low-cost
Allwinner A20 board with Arduino-style GPIO headers; it features 1G RAM,
4G NAND flash, 1 micro-SD, 2 USB sockets, 1 micro USB socket for OTG and
another for power in, HDMI, SATA, 5V power for SATA devices, gigabit
Ethernet, an IR receiver, 3.5mm audio out and a MIPI camera connector.

For more details, see: http://linux-sunxi.org/LinkSprite_pcDuino3_Nano

Changes in v3:
- rename LEDs to pcduino3-nano:green:usr[12]
- remove optional features on Arduino headers (i2c2, spi0, uart2)

Signed-off-by: Adam Sampson <ats@offog.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:16 +02:00
Priit Laes
17a3594345 ARM: dts: sun4i: Add initial dts for Gemei G9 tablet
Gemei G9 is an A10 based tablet, with 1G RAM, 16G NAND, 1024x768
IPS LCD display, stereo speakers, 1.3MP front camera and 5 MP
rear camera, 8000mAh battery, GT901 2+1 touchscreen, Bosch BMA250
accelerometer and RTL8188CUS USB wifi. It also has MicroSD slot,
miniHDMI, 1 x MicroUSB OTG port and 1 x MicroUSB host port and
3.5mm headphone jack.

Changes since v2:
 * Fix syntax error (brown paper bag release)

Changes since v1:
 * Added sun4i-lradc keymap
 * Added TODO note about missing IRQ pins for bma250
 * Fixed formatting issues and removed external URLs

Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
2015-04-27 08:20:16 +02:00
Maxime Ripard
1d86b4b52c ARM: sun5i: Relicense the A10s/A13 DTSI under GPLv2/X11
The current GPL only licensing on the DTSI makes it very impractical for other
software components licensed under another license.

In order to make it easier for them to reuse our device trees, relicense our
DTSI first under a GPL/X11 dual-license. Hopefully, the DTS will follow soon.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: David Lanzendörfer <david.lanzendoerfer@o2s.ch>
Acked-by: Emilio López <emilio@elopez.com.ar>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Oliver Schinagl <oliver@schinagl.nl>
Acked-by: Roman Byshko <rbyshko@gmail.com>
2015-04-27 08:20:16 +02:00
Maxime Ripard
033ba3d759 ARM: sun4i: Relicense the A10 DTSI under GPLv2/X11
The current GPL only licensing on the DTSI makes it very impractical for other
software components licensed under another license.

In order to make it easier for them to reuse our device trees, relicense our
DTSI first under a GPL/X11 dual-license. Hopefully, the DTS will follow soon.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Carlo Caione <carlo@caione.org>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: David Lanzendörfer <david.lanzendoerfer@o2s.ch>
Acked-by: Emilio López <emilio@elopez.com.ar>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Oliver Schinagl <oliver@schinagl.nl>
Acked-by: Roman Byshko <rbyshko@gmail.com>
Acked-by: Stefan Roese <sr@denx.de>
2015-04-27 08:20:16 +02:00
Linus Torvalds
b787f68c36 Linux 4.1-rc1 2015-04-26 17:59:10 -07:00
Andy Lutomirski
61f01dd941 x86_64, asm: Work around AMD SYSRET SS descriptor attribute issue
AMD CPUs don't reinitialize the SS descriptor on SYSRET, so SYSRET with
SS == 0 results in an invalid usermode state in which SS is apparently
equal to __USER_DS but causes #SS if used.

Work around the issue by setting SS to __KERNEL_DS __switch_to, thus
ensuring that SYSRET never happens with SS set to NULL.

This was exposed by a recent vDSO cleanup.

Fixes: e7d6eefaaa44 x86/vdso32/syscall.S: Do not load __USER32_DS to %ss
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Peter Anvin <hpa@zytor.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Denys Vlasenko <vda.linux@googlemail.com>
Cc: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2015-04-26 17:57:38 -07:00
Linus Torvalds
1190944f4b Merge branch 'drm-fixes' of git://people.freedesktop.org/~airlied/linux
Pull intel drm fixes from Dave Airlie.

* 'drm-fixes' of git://people.freedesktop.org/~airlied/linux:
  drm/i915: vlv: fix save/restore of GFX_MAX_REQ_COUNT reg
  drm/i915: Workaround to avoid lite restore with HEAD==TAIL
  drm/i915: cope with large i2c transfers
2015-04-26 17:55:26 -07:00
Linus Torvalds
9f86262dcc Merge git://git.infradead.org/intel-iommu
Pull intel iommu updates from David Woodhouse:
 "This lays a little of the groundwork for upcoming Shared Virtual
  Memory support — fixing some bogus #defines for capability bits and
  adding the new ones, and starting to use the new wider page tables
  where we can, in anticipation of actually filling in the new fields
  therein.

  It also allows graphics devices to be assigned to VM guests again.
  This got broken in 3.17 by disallowing assignment of RMRR-afflicted
  devices.  Like USB, we do understand why there's an RMRR for graphics
  devices — and unlike USB, it's actually sane.  So we can make an
  exception for graphics devices, just as we do USB controllers.

  Finally, tone down the warning about the X2APIC_OPT_OUT bit, due to
  persistent requests.  X2APIC_OPT_OUT was added to the spec as a nasty
  hack to allow broken BIOSes to forbid us from using X2APIC when they
  do stupid and invasive things and would break if we did.

  Someone noticed that since Windows doesn't have full IOMMU support for
  DMA protection, setting the X2APIC_OPT_OUT bit made Windows avoid
  initialising the IOMMU on the graphics unit altogether.

  This means that it would be available for use in "driver mode", where
  the IOMMU registers are made available through a BAR of the graphics
  device and the graphics driver can do SVM all for itself.

  So they started setting the X2APIC_OPT_OUT bit on *all* platforms with
  SVM capabilities.  And even the platforms which *might*, if the
  planets had been aligned correctly, possibly have had SVM capability
  but which in practice actually don't"

* git://git.infradead.org/intel-iommu:
  iommu/vt-d: support extended root and context entries
  iommu/vt-d: Add new extended capabilities from v2.3 VT-d specification
  iommu/vt-d: Allow RMRR on graphics devices too
  iommu/vt-d: Print x2apic opt out info instead of printing a warning
  iommu/vt-d: kill bogus ecap_niotlb_iunits()
2015-04-26 17:47:46 -07:00