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omap-for-v3.8/cleanup-headers-dss
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Now that VRFB driver handles its registers independently, we can remove
the VRFB related code from OMAP's sdrc.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
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Now that vrfb driver is not omap dependent anymore, we can move vrfb.h
from arch/arm/plat-omap/include/plat to include/video/omapvrfb.h.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
Cc: Vaibhav Hiremath <hvaibhav@ti.com>
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This patch converts vrfb library into a platform device, in an effort to
remove omap dependencies.
The platform device is registered in arch/arm/plat-omap/fb.c and
assigned resources depending on whether running on omap2 or omap3.
The vrfb driver will parse those resources and use them to access vrfb
configuration registers and the vrfb virtual rotation areas.
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Cc: Tony Lindgren <tony@atomide.com>
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Add new enum, omapdss_version, that is used to tell which DSS hardware
version the SoC has. This enum is initialized during platform init, and
passed in the platform data to omapdss driver.
Note that the versions are not "continuous", that is, you cannot check
if the version is less or greater than something, but you need to check
for exact version match. In other words, this is invalid:
/* test if DSS is 3630 or earlier */
if (ver <= OMAPDSS_VER_OMAP3630)
...
Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux
Pull module signing support from Rusty Russell:
"module signing is the highlight, but it's an all-over David Howells frenzy..."
Hmm "Magrathea: Glacier signing key". Somebody has been reading too much HHGTTG.
* 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (37 commits)
X.509: Fix indefinite length element skip error handling
X.509: Convert some printk calls to pr_devel
asymmetric keys: fix printk format warning
MODSIGN: Fix 32-bit overflow in X.509 certificate validity date checking
MODSIGN: Make mrproper should remove generated files.
MODSIGN: Use utf8 strings in signer's name in autogenerated X.509 certs
MODSIGN: Use the same digest for the autogen key sig as for the module sig
MODSIGN: Sign modules during the build process
MODSIGN: Provide a script for generating a key ID from an X.509 cert
MODSIGN: Implement module signature checking
MODSIGN: Provide module signing public keys to the kernel
MODSIGN: Automatically generate module signing keys if missing
MODSIGN: Provide Kconfig options
MODSIGN: Provide gitignore and make clean rules for extra files
MODSIGN: Add FIPS policy
module: signature checking hook
X.509: Add a crypto key parser for binary (DER) X.509 certificates
MPILIB: Provide a function to read raw data into an MPI
X.509: Add an ASN.1 decoder
X.509: Add simple ASN.1 grammar compiler
...
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Use the mapping of Elf_[SPE]hdr, Elf_Addr, Elf_Sym, Elf_Dyn, Elf_Rel/Rela,
ELF_R_TYPE() and ELF_R_SYM() to either the 32-bit version or the 64-bit version
into asm-generic/module.h for all arches bar MIPS.
Also, use the generic definition mod_arch_specific where possible.
To this end, I've defined three new config bools:
(*) HAVE_MOD_ARCH_SPECIFIC
Arches define this if they don't want to use the empty generic
mod_arch_specific struct.
(*) MODULES_USE_ELF_RELA
Arches define this if their modules can contain RELA records. This causes
the Elf_Rela mapping to be emitted and allows apply_relocate_add() to be
defined by the arch rather than have the core emit an error message.
(*) MODULES_USE_ELF_REL
Arches define this if their modules can contain REL records. This causes
the Elf_Rel mapping to be emitted and allows apply_relocate() to be
defined by the arch rather than have the core emit an error message.
Note that it is possible to allow both REL and RELA records: m68k and mips are
two arches that do this.
With this, some arch asm/module.h files can be deleted entirely and replaced
with a generic-y marker in the arch Kbuild file.
Additionally, I have removed the bits from m32r and score that handle the
unsupported type of relocation record as that's now handled centrally.
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
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Pull ARM update from Russell King:
"This is the final round of stuff for ARM, left until the end of the
merge window to reduce the number of conflicts. This set contains the
ARM part of David Howells UAPI changes, and a fix to the ordering of
'select' statements in ARM Kconfig files (see the appropriate commit
for why this happened - thanks to Andrew Morton for pointing out the
problem.)
I've left this as long as I dare for this window to avoid conflicts,
and I regenerated the config patch yesterday, posting it to our
mailing list for review and testing. I have several acks which
include successful test reports for it.
However, today I notice we've got new conflicts with previously unseen
code... though that conflict should be trivial (it's my changes vs a
one liner.)"
* 'late-for-linus' of git://git.linaro.org/people/rmk/linux-arm:
ARM: config: make sure that platforms are ordered by option string
ARM: config: sort select statements alphanumerically
UAPI: (Scripted) Disintegrate arch/arm/include/asm
Fix up fairly conflict in arch/arm/Kconfig (the select re-organization
vs recent addition of GENERIC_KERNEL_EXECVE)
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The large platform selection choice should be sorted by option string
so it's easy to find the platform you're looking for. Fix the few
options which are out of this order.
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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As suggested by Andrew Morton:
This is a pet peeve of mine. Any time there's a long list of items
(header file inclusions, kconfig entries, array initalisers, etc) and
someone wants to add a new item, they *always* go and stick it at the
end of the list.
Guys, don't do this. Either put the new item into a randomly-chosen
position or, probably better, alphanumerically sort the list.
lets sort all our select statements alphanumerically. This commit was
created by the following perl:
while (<>) {
while (/\\\s*$/) {
$_ .= <>;
}
undef %selects if /^\s*config\s+/;
if (/^\s+select\s+(\w+).*/) {
if (defined($selects{$1})) {
if ($selects{$1} eq $_) {
print STDERR "Warning: removing duplicated $1 entry\n";
} else {
print STDERR "Error: $1 differently selected\n".
"\tOld: $selects{$1}\n".
"\tNew: $_\n";
exit 1;
}
}
$selects{$1} = $_;
next;
}
if (%selects and (/^\s*$/ or /^\s+help/ or /^\s+---help---/ or
/^endif/ or /^endchoice/)) {
foreach $k (sort (keys %selects)) {
print "$selects{$k}";
}
undef %selects;
}
print;
}
if (%selects) {
foreach $k (sort (keys %selects)) {
print "$selects{$k}";
}
}
It found two duplicates:
Warning: removing duplicated S5P_SETUP_MIPIPHY entry
Warning: removing duplicated HARDIRQS_SW_RESEND entry
and they are identical duplicates, hence the shrinkage in the diffstat
of two lines.
We have four testers reporting success of this change (Tony, Stephen,
Linus and Sekhar.)
Acked-by: Jason Cooper <jason@lakedaemon.net>
Acked-by: Tony Lindgren <tony@atomide.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull third pile of kernel_execve() patches from Al Viro:
"The last bits of infrastructure for kernel_thread() et.al., with
alpha/arm/x86 use of those. Plus sanitizing the asm glue and
do_notify_resume() on alpha, fixing the "disabled irq while running
task_work stuff" breakage there.
At that point the rest of kernel_thread/kernel_execve/sys_execve work
can be done independently for different architectures. The only
pending bits that do depend on having all architectures converted are
restrictred to fs/* and kernel/* - that'll obviously have to wait for
the next cycle.
I thought we'd have to wait for all of them done before we start
eliminating the longjump-style insanity in kernel_execve(), but it
turned out there's a very simple way to do that without flagday-style
changes."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal:
alpha: switch to saner kernel_execve() semantics
arm: switch to saner kernel_execve() semantics
x86, um: convert to saner kernel_execve() semantics
infrastructure for saner ret_from_kernel_thread semantics
make sure that kernel_thread() callbacks call do_exit() themselves
make sure that we always have a return path from kernel_execve()
ppc: eeh_event should just use kthread_run()
don't bother with kernel_thread/kernel_execve for launching linuxrc
alpha: get rid of switch_stack argument of do_work_pending()
alpha: don't bother passing switch_stack separately from regs
alpha: take SIGPENDING/NOTIFY_RESUME loop into signal.c
alpha: simplify TIF_NEED_RESCHED handling
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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media
Pull second set of media updates from Mauro Carvalho Chehab:
"Despite its size, most of the stuff here is trivial. This series
contains:
- s5p-mfc: additions at the driver and at the core to support H.264
hardware codec;
- Some improvements at s5p and davinci embedded drivers;
- Some V4L2 compliance fixes applied on a few drivers;
- Several random trivial patches, including several fixes and a few
new board support additions;
Notes:
1) Some Exynos media patches were dependent on some -arm fixes that
got merged on changeset 782cd9e. That's why this pull request is
based that changeset.
2) As promised, I reviewed the pending VB2 DMABUF series.
While setting a test environment, it was noticed that the upstream
support for Samsung Exynos 4 boards (smdk310 and Origen) are
broken upstream, likely due to regressions: both defconfigs are
wrong and regulator settings for both boards are broken. That,
allied with some bug at the dummy regulator driver, causes OOPSes
during boot time.
Long story short: even fixing the above, the proposed patches
OOPSed when running the DMABUF test. Not sure yet if the OOPSes
are due to some other undetected regressions, or due to some bug
on the patches.
Due to the above, DMABUF patches for vb2 got NACKed for 3.7."
* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (109 commits)
[media] m5mols: Add missing #include <linux/sizes.h>
[media] stk1160: Add support for S-Video input
Revert "[media] omap3isp: Replace cpu_is_omap3630() with ISP revision check"
[media] dvb: LNA implementation changes
[media] v4l2-ioctl: fix W=1 warnings
[media] v4l2-ioctl: add blocks check for VIDIOC_SUBDEV_G/S_EDID
[media] omap3isp: Fix compilation error in ispreg.h
[media] rc-msi-digivox-ii: Add full scan keycodes
[media] cx25821: testing the wrong variable
[media] tda18271-common: hold the I2C adapter during write transfers
[media] ds3000: add module parameter to force firmware upload
[media] drivers/media: Remove unnecessary semicolon
[media] winbond: remove space from driver name
[media] iguanair: cannot send data from the stack
[media] omap3isp: Replace cpu_is_omap3630() with ISP revision check
[media] dvb-usb: print small buffers via %*ph
[media] uvc: Add return code check at vb2_queue_init()
[media] em28xx: Replace memcpy with struct assignment
[media] bt8xx: Add video4linux control V4L2_CID_COLOR_KILLER
[media] mem2mem_testdev: Use devm_kzalloc() in probe
...
Conflicts:
arch/arm/mach-davinci/include/mach/da8xx.h
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Applied on the top of changeset 782cd9e, as some of those patches
depend on some fixes that went via -arm tree.
* staging/for_v3.7: (109 commits)
[media] m5mols: Add missing #include <linux/sizes.h>
[media] stk1160: Add support for S-Video input
Revert "[media] omap3isp: Replace cpu_is_omap3630() with ISP revision check"
[media] dvb: LNA implementation changes
[media] v4l2-ioctl: fix W=1 warnings
[media] v4l2-ioctl: add blocks check for VIDIOC_SUBDEV_G/S_EDID
[media] omap3isp: Fix compilation error in ispreg.h
[media] rc-msi-digivox-ii: Add full scan keycodes
[media] cx25821: testing the wrong variable
[media] tda18271-common: hold the I2C adapter during write transfers
[media] ds3000: add module parameter to force firmware upload
[media] drivers/media: Remove unnecessary semicolon
[media] winbond: remove space from driver name
[media] iguanair: cannot send data from the stack
[media] omap3isp: Replace cpu_is_omap3630() with ISP revision check
[media] dvb-usb: print small buffers via %*ph
[media] uvc: Add return code check at vb2_queue_init()
[media] em28xx: Replace memcpy with struct assignment
[media] bt8xx: Add video4linux control V4L2_CID_COLOR_KILLER
[media] mem2mem_testdev: Use devm_kzalloc() in probe
...
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* samsung_platform_data:
ARM: samsung: move platform_data definitions
ARM: orion: move platform_data definitions
ARM: nomadik: move platform_data definitions
ARM: w90x900: move platform_data definitions
ARM: vt8500: move platform_data definitions
ARM: tegra: move sdhci platform_data definition
ARM: sa1100: move platform_data definitions
ARM: pxa: move platform_data definitions
ARM: netx: move platform_data definitions
ARM: msm: move platform_data definitions
ARM: imx: move platform_data definitions
ARM: ep93xx: move platform_data definitions
ARM: davinci: move platform_data definitions
ARM: at91: move platform_data definitions
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Rename MIPI-CSIS regulator supply names to match definitions in
the driver after commit "s5p-csis: Change regulator supply names".
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Replace pdev argument __s5p_mipi_phy_control() helper with plain int
so MIPI-CSIS hardware instance index can be passed directly making
the function usable on platforms instantiated from device tree.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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The MIPI-CSI2 bus data alignment is now being derived from the media
bus pixel code, the drivers don't use the corresponding structure
fields, so remove them. Also remove the s5p_csis_phy_enable callback
which is now used directly by s5p-csis driver.
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Acked-by: Kukjin Kim <kgene.kim@samsung.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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vpif_display relied on a 1-1 mapping of output and subdev. This is not
necessarily the case. Separate the two. So there is a list of subdevs
and a list of outputs. Each output refers to a subdev and has routing
information. An output does not have to have a subdev.
The initial output for each channel is set to the fist output.
Currently missing is support for associating multiple subdevs with
an output.
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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struct vpif_interface is channel specific, not subdev specific.
Move it to the channel config.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Tested-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Routing information is a property of the input, not of the subdev.
One subdev may provide multiple inputs, each with its own routing
information.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Tested-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Calling a subdev op that isn't implemented will just return -ENOIOCTLCMD
No need to have a flag for that.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Acked-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Tested-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Include the expander settings to select VPIF peripheral on
UI card and add registration call in EVM init. Also add platform
data to configure display and capture devices.
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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Add clock, pin mux definitions and registration function for
VPIF capture and display driver on DA850/OMAP-L138 SoC.
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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V4L2_OUT_CAP_DV_TIMINGS
This patch replaces V4L2_OUT_CAP_CUSTOM_TIMINGS macro with
V4L2_OUT_CAP_DV_TIMINGS. As V4L2_OUT_CAP_CUSTOM_TIMINGS is being phased
out.
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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This patch replaces the preset API by the timings API, and
appropriate changes in board file.
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Lad, Prabhakar <prabhakar.lad@ti.com>
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Acked-by: Sekhar Nori <nsekhar@ti.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl
Pull second set of pinctrl patches from Linus Walleij:
"Here is a late pinctrl pull request with stuff that wasn't quite
tested at the first pull request.
The main reason to not hold off is that the modifications to
irq_domain_add_simple() as reviewed by Rob Herring introduce new
infrastructure for irqdomains that will be useful for the next cycle:
instead of sprinkling irq descriptor allocation all over the kernel
wherever a "legacy" domain is registered, which is necessary for any
platform using sparse IRQs, and many irq chips are say GPIO
controllers which may be used with several systems, some with sparse
IRQs some not, we push this into the irq_domain_add_simple() so we can
atleast do mistakes in one place.
The irq_domain_add_simple() is currently unused in the kernel, so I
need to provide a user. The Nomadik stuff that goes with are changes
to the driver I use day-to-day to make use of this facility (and a
dependency), so see it as a way to eat my own dogfood: if this blows
up the egg hits my face.
A second round of pinctrl patches for v3.7:
- Complement the Nomadik pinctrl driver with alternate Cx functions
so it handles all oddities.
- A patch to the IRQdomain to reform the simple irqdomain to handle
IRQ descriptor allocation dynamically.
- Use the above feature in the Nomadik pin controller."
* tag 'pinctrl-for-3.7-late' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl:
pinctrl/nomadik: use simple or linear IRQ domain
irqdomain: augment add_simple() to allocate descs
pinctrl/nomadik: support other alternate-C functions
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Upgrade nomadik pinctrl driver to enable selection of other
alternate-C[1-4] functions on some specific ux500 SoC pins.
Handling of those functions is done thanks to PRCM GPIOCR
registers. This was previously managed in PRCMU driver and
it was not really convenient. Idea is to provide a common
way to control all alternate functions.
Note that this improvement does not support the old-fashioned way
used to control nomadik pins, namely the "nmk_config_pin()" function
and its derivatives.
Signed-off-by: Jean-Nicolas Graux <jean-nicolas.graux@stericsson.com>
Reviewed-by: Philippe Langlais <philippe.langlais@stericsson.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
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Pull second set of ARM updates from Russell King:
"This is the second set of ARM updates for this merge window.
Contained within are changes to allow the kernel to boot in hypervisor
mode on CPUs supporting virtualization, and cache flushing support to
the point of inner sharable unification, which are used by the
suspend/resume code to avoid having to do a full cache flush.
Also included is one fix for VFP code identified by Michael Olbrich."
* 'for-linus' of git://git.linaro.org/people/rmk/linux-arm:
ARM: vfp: fix saving d16-d31 vfp registers on v6+ kernels
ARM: 7549/1: HYP: fix boot on some ARM1136 cores
ARM: 7542/1: mm: fix cache LoUIS API for xscale and feroceon
ARM: mm: update __v7_setup() to the new LoUIS cache maintenance API
ARM: kernel: update __cpu_disable to use cache LoUIS maintenance API
ARM: kernel: update cpu_suspend code to use cache LoUIS operations
ARM: mm: rename jump labels in v7_flush_dcache_all function
ARM: mm: implement LoUIS API for cache maintenance ops
ARM: virt: arch_timers: enable access to physical timers
ARM: virt: Add CONFIG_ARM_VIRT_EXT option
ARM: virt: Add boot-time diagnostics
ARM: virt: Update documentation for hyp mode entry support
ARM: zImage/virt: hyp mode entry support for the zImage loader
ARM: virt: allow the kernel to be entered in HYP mode
ARM: opcodes: add __ERET/__MSR_ELR_HYP instruction encoding
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Conflicts:
arch/arm/kernel/smp.c
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Michael Olbrich reported that his test program fails when built with
-O2 -mcpu=cortex-a8 -mfpu=neon, and a kernel which supports v6 and v7
CPUs:
volatile int x = 2;
volatile int64_t y = 2;
int main() {
volatile int a = 0;
volatile int64_t b = 0;
while (1) {
a = (a + x) % (1 << 30);
b = (b + y) % (1 << 30);
assert(a == b);
}
}
and two instances are run. When built for just v7 CPUs, this program
works fine. It uses the "vadd.i64 d19, d18, d16" VFP instruction.
It appears that we do not save the high-16 double VFP registers across
context switches when the kernel is built for v6 CPUs. Fix that.
Cc: <stable@vger.kernel.org>
Tested-By: Michael Olbrich <m.olbrich@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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It appears that performing a "movs pc, lr" to force the kernel into
SVC mode on the OMAP2420 (ARM1136) prevents the platform from booting
correctly (change introduced in 80c59da [ARM: virt: allow the kernel
to be entered in HYP mode]).
While the reason it fails is not understood yet (the same code runs
fine on the OMAP2430, ARM1136 as well), partially revert that change
for platforms that do not enter in HYP mode, preserving the new
feature and restoring a working kernel on the OMAP2420.
Reported-by: Tony Lindgren <tony@atomide.com>
Acked-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms into devel-stable
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If booting in HYP mode, it makes sense to enable the use of the
physical timers, so the kernel can use them directly.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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It is now possible to enable the virtualization extention support.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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In order to easily detect pathological cases, print some diagnostics
when the kernel boots.
This also provides helpers to detect that HYP mode is actually available,
which can be used by other subsystems to enable HYP specific features.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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The zImage loader needs to turn on the MMU in order to take
advantage of caching while decompressing the zImage. Running this
in hyp mode would require the LPAE pagetable format to be
supported; to avoid this complexity, this patch switches out of hyp
mode, and returns back to hyp mode just before booting the kernel.
This implementation assumes that the Hyp mode view of memory and the
PL1 view of memory are coherent, providing that the MMU and caches
are off in both, as required by the boot protocol. The zImage
decompression code must drain the write buffer on completion anyway, and
entry into Hyp mode should flush any prefetch buffer, avoiding hazards
associated with local write buffers and the pipeline.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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This patch does two things:
* Ensure that asynchronous aborts are masked at kernel entry.
The bootloader should be masking these anyway, but this reduces
the damage window just in case it doesn't.
* Enter svc mode via exception return to ensure that CPU state is
properly serialised. This does not matter when switching from
an ordinary privileged mode ("PL1" modes in ARMv7-AR rev C
parlance), but it potentially does matter when switching from a
another privileged mode such as hyp mode.
This should allow the kernel to boot safely either from svc mode or
hyp mode, even if no support for use of the ARM Virtualization
Extensions is built into the kernel.
Signed-off-by: Dave Martin <dave.martin@linaro.org>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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Enabling boot from HYP mode requires the use of some more
virt-specific instructions ("eret" and "msr elr_hyp, reg").
Add the necessary encoding to asm/opcode-virt.h.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
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Some architectures like xscale and feroceon have cache API variants that
map cache flushing functions as aliases to the base architecture.
This patch adds the required aliases to complete the implementation of
cache flushing LoUIS API.
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The ARMv7 processor setup function __v7_setup() cleans and invalidates the
CPU cache before enabling MMU to start the CPU with a clean CPU local cache.
But on ARMv7 architectures like Cortex-[A15/A8], this code will end
up flushing the L2 caches(up to level of Coherency) which is undesirable
and expensive. The setup functions are used in the CPU hotplug scenario too
and hence flushing all cache levels should be avoided.
This patch replaces the cache flushing call with the newly introduced
v7 dcache LoUIS API where only cache levels up to LoUIS are cleaned and
invalidated when a processors executes __v7_setup which is the expected
behavior.
For processors like A9 and A5 where the L2 cache is an outer one the
behavior should be unchanged.
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
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When a CPU is hotplugged out caches that reside in its power domain
lose their contents and so must be cleaned to the next memory level.
Currently, __cpu_disable calls flush_cache_all() that for new generation
processor like A15/A7 ends up cleaning and invalidating all cache levels
up to Level of Coherency, which includes the unified L2.
This ends up being a waste of cycles since the L2 cache contents are not
lost on power down.
This patch updates __cpu_disable to use the new LoUIS API cache operations.
Acked-by: Nicolas Pitre <nico@linaro.org>
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
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In processors like A15/A7 L2 cache is unified and integrated within the
processor cache hierarchy, so that it is not considered an outer cache
anymore. For processors like A15/A7 flush_cache_all() ends up cleaning
all cache levels up to Level of Coherency (LoC) that includes
the L2 unified cache.
When a single CPU is suspended (CPU idle) a complete L2 clean is not
required, so generic cpu_suspend code must clean the data cache using the
newly introduced cache LoUIS function.
The context and stack pointer (context pointer) are cleaned to main memory
using cache area functions that operate on MVA and guarantee that the data
is written back to main memory (perform cache cleaning up to the Point of
Coherency - PoC) so that the processor can fetch the context when the MMU
is off in the cpu_resume code path.
outer_cache management remains unchanged.
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
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This patch renames jump labels in v7_flush_dcache_all in order to define
a specific flush cache levels entry point.
Acked-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
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ARM v7 architecture introduced the concept of cache levels and related
control registers. New processors like A7 and A15 embed an L2 unified cache
controller that becomes part of the cache level hierarchy. Some operations in
the kernel like cpu_suspend and __cpu_disable do not require a flush of the
entire cache hierarchy to DRAM but just the cache levels belonging to the
Level of Unification Inner Shareable (LoUIS), which in most of ARM v7 systems
correspond to L1.
The current cache flushing API used in cpu_suspend and __cpu_disable,
flush_cache_all(), ends up flushing the whole cache hierarchy since for
v7 it cleans and invalidates all cache levels up to Level of Coherency
(LoC) which cripples system performance when used in hot paths like hotplug
and cpuidle.
Therefore a new kernel cache maintenance API must be added to cope with
latest ARM system requirements.
This patch adds flush_cache_louis() to the ARM kernel cache maintenance API.
This function cleans and invalidates all data cache levels up to the
Level of Unification Inner Shareable (LoUIS) and invalidates the instruction
cache for processors that support it (> v7).
This patch also creates an alias of the cache LoUIS function to flush_kern_all
for all processor versions prior to v7, so that the current cache flushing
behaviour is unchanged for those processors.
v7 cache maintenance code implements a cache LoUIS function that cleans and
invalidates the D-cache up to LoUIS and invalidates the I-cache, according
to the new API.
Reviewed-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
Reviewed-by: Nicolas Pitre <nico@linaro.org>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Tested-by: Shawn Guo <shawn.guo@linaro.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal
Pull pile 2 of execve and kernel_thread unification work from Al Viro:
"Stuff in there: kernel_thread/kernel_execve/sys_execve conversions for
several more architectures plus assorted signal fixes and cleanups.
There'll be more (in particular, real fixes for the alpha
do_notify_resume() irq mess)..."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (43 commits)
alpha: don't open-code trace_report_syscall_{enter,exit}
Uninclude linux/freezer.h
m32r: trim masks
avr32: trim masks
tile: don't bother with SIGTRAP in setup_frame
microblaze: don't bother with SIGTRAP in setup_rt_frame()
mn10300: don't bother with SIGTRAP in setup_frame()
frv: no need to raise SIGTRAP in setup_frame()
x86: get rid of duplicate code in case of CONFIG_VM86
unicore32: remove pointless test
h8300: trim _TIF_WORK_MASK
parisc: decide whether to go to slow path (tracesys) based on thread flags
parisc: don't bother looping in do_signal()
parisc: fix double restarts
bury the rest of TIF_IRET
sanitize tsk_is_polling()
bury _TIF_RESTORE_SIGMASK
unicore32: unobfuscate _TIF_WORK_MASK
mips: NOTIFY_RESUME is not needed in TIF masks
mips: merge the identical "return from syscall" per-ABI code
...
Conflicts:
arch/arm/include/asm/thread_info.h
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This include is no longer needed.
(seems to be a leftover from try_to_freeze())
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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