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693,635 commits

Author SHA1 Message Date
Florian Fainelli
ac2629a479 net: dsa: Move dsa_switch_{suspend,resume} out of legacy.c
dsa_switch_suspend() and dsa_switch_resume() are functions that belong in
net/dsa/dsa.c and are not part of the legacy platform support code.

Fixes: a6a71f19fe ("net: dsa: isolate legacy code")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-02 10:31:16 -04:00
Florian Westphal
8e71bf75ef selinux: use pernet operations for hook registration
It will allow us to remove the old netfilter hook api in the near future.

Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Paul Moore <paul@paul-moore.com>
2017-06-02 10:27:46 -04:00
Florian Fainelli
d31353cd75 net: systemport: Fix missing Wake-on-LAN interrupt for SYSTEMPORT Lite
On SYSTEMPORT Lite, since we have the main interrupt source in the first
cell, the second cell is the Wake-on-LAN interrupt, yet the code was not
properly updated to fetch the second cell, and instead looked at the
third and non-existing cell for Wake-on-LAN.

Fixes: 44a4524c54 ("net: systemport: Add support for SYSTEMPORT Lite")
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-02 10:25:56 -04:00
Zhang Shengju
3a5f8997dc team: add macro MODULE_ALIAS_TEAM_MODE for team mode alias
Add a new macro MODULE_ALIAS_TEAM_MODE to unify and simplify the
declaration of team mode alias.

Signed-off-by: Zhang Shengju <zhangshengju@cmss.chinamobile.com>
Acked-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-06-02 10:20:49 -04:00
Andi Kleen
918c7b062a perf stat: Only print NMI watchdog hint when enabled
Only print the NMI watchdog hint when that watchdog it actually enabled.

This avoids printing these unnecessarily.

Signed-off-by: Andi Kleen <ak@linux.intel.com>
Acked-by: Jiri Olsa <jolsa@kernel.org>
Link: http://lkml.kernel.org/n/tip-lnw7edxnqsphkmeew857wz1i@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2017-06-02 11:15:34 -03:00
Lorenzo Pieralisi
cb7cf772d8 ARM64/ACPI: Fix BAD_MADT_GICC_ENTRY() macro implementation
The BAD_MADT_GICC_ENTRY() macro checks if a GICC MADT entry passes
muster from an ACPI specification standpoint. Current macro detects the
MADT GICC entry length through ACPI firmware version (it changed from 76
to 80 bytes in the transition from ACPI 5.1 to ACPI 6.0 specification)
but always uses (erroneously) the ACPICA (latest) struct (ie struct
acpi_madt_generic_interrupt - that is 80-bytes long) length to check if
the current GICC entry memory record exceeds the MADT table end in
memory as defined by the MADT table header itself, which may result in
false negatives depending on the ACPI firmware version and how the MADT
entries are laid out in memory (ie on ACPI 5.1 firmware MADT GICC
entries are 76 bytes long, so by adding 80 to a GICC entry start address
in memory the resulting address may well be past the actual MADT end,
triggering a false negative).

Fix the BAD_MADT_GICC_ENTRY() macro by reshuffling the condition checks
and update them to always use the firmware version specific MADT GICC
entry length in order to carry out boundary checks.

Fixes: b6cfb27737 ("ACPI / ARM64: add BAD_MADT_GICC_ENTRY() macro")
Reported-by: Julien Grall <julien.grall@arm.com>
Acked-by: Will Deacon <will.deacon@arm.com>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Cc: Julien Grall <julien.grall@arm.com>
Cc: Hanjun Guo <hanjun.guo@linaro.org>
Cc: Al Stone <ahs3@redhat.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2017-06-02 15:13:52 +01:00
Elaine Zhang
223c24be74 clk: rockchip: mark some special clk as critical on rk3368
The jtag clk no driver to handle them.
But this clk need enable,so make it as critical.

The ddrphy/ddrupctl clks no driver to handle them,
Chip design requirements for these clock to always on,

The pmu_hclk_otg0 is Chip design defect, must be always on,

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 15:57:32 +02:00
Chris Wilson
1d24ad457c drm/i915: Allow kswapd to pause the device whilst reaping
In commit 5763ff04dc ("drm/i915: Avoid GPU stalls from kswapd") we
stopped direct reclaim and kswapd from triggering GPU/client stalls
whilst running (by restricting the objects they could reap to be idle).

However with abusive GPU usage, it becomes quite easy to starve kswapd
of memory and prevent it from making forward progress towards obtaining
enough free memory (thus driving the system closer to swap exhaustion).
Relax the previous restriction to allow kswapd (but not direct reclaim)
to stall the device whilst reaping purgeable pages.

v2: Also acquire the rpm wakelock to allow kswapd to unbind buffers.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170601133331.5973-1-chris@chris-wilson.co.uk
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
2017-06-02 14:54:27 +01:00
Elaine Zhang
55bb6a633c clk: rockchip: mark noc and some special clk as critical on rk3288
The atclk/dbg/jtag/hsic-xin12m/pclk_core clks no driver to handle them.
But this clks need enable,so make it as ignore_unused for now.

The ddrupctl0/ddrupctl1/publ0/publ1 clks no driver to handle them,
Chip design requirements for these clock to always on,

The pmu_hclk_otg0 is Chip design defect, must be always on,

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 15:54:20 +02:00
Elaine Zhang
f18c0994cd clk: rockchip: mark noc and some special clk as critical on rk3228
The jtag/bus/peri/initmem/rom/stimer/phy clks no driver to handle them.
But this clks need enable,so make it as critical.

The ddrupctl/ddrmon/ddrphy clks no driver to handle them,
Chip design requirements for these clock to always on,

The hclk_otg_pmu is Chip design defect, must be always on,
The new document will update the description of this clock.

All these non-noc/non-arbi clocks,IC suggest always on,
Because it's have some order limitation, between the NOC clock switch
and bus IDLE(or pd on/off).

The software is not very good to solve this constraint.
Always on these clocks, has no effect on the system power consumption.
The new document will update the description of these clock.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 15:51:11 +02:00
Yuantian Tang
0cee73f751 ahci: qoriq: add ls1088a platforms support
Ls1088a is new introduced arm-based soc with sata support with
following features:

* Complies with the serial ATA 3.0 specification
  and the AHCI 1.3.1 specification
* Contains a high-speed descriptor-based DMA controller
* Supports the following:
* Speeds of 1.5 Gb/s (first-generation SATA),
  3 Gb/s (second-generation SATA), and 6 Gb/s (third-generation SATA)
* FIS-based switching
* Native command queuing (NCQ) commands
* Port multiplier operation
* Asynchronous notification
* SATA Vendor BIST mode

Signed-off-by: Tang Yuantian <andy.tang@nxp.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
2017-06-02 09:49:33 -04:00
Elaine Zhang
f2893aaba4 clk: rockchip: mark pclk_ddrupctl as critical_clock on rk3036
No driver to handle this clk yet, but chip design requiress for this clock
supplying the ddr controller to be always on.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 15:42:38 +02:00
Weinan Li
ff8f797557 drm/i915: return the correct usable aperture size under gvt environment
I915_GEM_GET_APERTURE ioctl is used to probe aperture size from userspace.
In gvt environment, each vm only use the ballooned part of aperture, so we
should return the correct available aperture size exclude the reserved part
by balloon.

v2: add 'reserved' in struct i915_address_space to record the reserved size
in ggtt (Chris)

v3: remain aper_size as total, adjust aper_available_size exclude reserved
and pinned. UMD driver need to adjust the max allocation size according to
the available aperture size but not total size. KMD return the correct
usable aperture size any time (Chris, Joonas)

v4: decrease reserved in deballoon (Joonas)

v5: add onion teardown in balloon, add vgt_deballoon_space (Joonas)

v6: change title name (Zhenyu)

v7: code style refine (Joonas)

Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Suggested-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Weinan Li <weinan.z.li@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1496198152-14175-1-git-send-email-weinan.z.li@intel.com
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
2017-06-02 14:28:46 +01:00
Elaine Zhang
f6022e88fa clk: rockchip: add clock controller for rk3128
Add the clock tree definition for the new rk3128 SoC.
And it also applies to the RK3126 SoC.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 14:49:35 +02:00
Elaine Zhang
de2ddc3b69 dt-bindings: add bindings for rk3128 clock controller
Add devicetree bindings for Rockchip cru which found on
Rockchip SoCs.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 14:49:26 +02:00
Elaine Zhang
5d2595627e clk: rockchip: export more rk3228 clocks ids
This patch exports related BUS/VPU/RGA/HDCP/IEP/TSP/WIFI/
VIO/USB/EFUSE/GPU/CRYPTO clocks for dts reference.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 14:48:40 +02:00
Eddie Cai
25fb42b1cf clk: rockchip: add ids for rk3399 testclks used for camera handling
clk_testout1 and clk_testout2 are used for camera handling, so add their ids.

Signed-off-by: Eddie Cai <eddie.cai.linux@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 14:48:38 +02:00
Heiko Stuebner
f08b559edf Merge branch 'v4.13-shared/clkids' into v4.13-clk/next 2017-06-02 14:48:32 +02:00
Harald Freudenberger
e385050873 s390/zcrypt: Fix blocking queue device after unbind/bind.
When the association between a queue device and the
driver is released via unbind and later re-associated
the queue device was not operational any more. Reason
was a wrong administration of the card/queue lists
within the ap device driver.

This patch introduces revised card/queue list handling
within the ap device driver: when an ap device is
detected it is initial not added to the card/queue list
any more. With driver probe the card device is added to
the card list/the queue device is added to the queue list
within a card. With driver remove the device is removed
from the card/queue list. Additionally there are some
situations within the ap device live where the lists
need update upon card/queue device release (for example
device hot unplug or suspend/resume).

Signed-off-by: Harald Freudenberger <freude@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2017-06-02 14:30:12 +02:00
Elaine Zhang
b20841b9e0 clk: rockchip: add dt-binding header for rk3128
Add the dt-bindings header for the rk3128,
that gets shared between the clock controller and
the clock references in the dts.
Add softreset ID for rk3128.
And it also applies to the RK3126 SoC.

Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 14:17:05 +02:00
Carlo Caione
715e944f8a HID: asus: Stop underlying hardware on remove
We are missing a call to hid_hw_stop() on the remove hook.
Among other things this is causing an Oops when (re-)starting GNOME /
upowerd / ... after the module has been already rmmod-ed.

Signed-off-by: Carlo Caione <carlo@endlessm.com>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
2017-06-02 14:13:22 +02:00
William Wu
81b61d3770 ARM: dts: rockchip: enable usb for rk3229 evb board
Rockchip's rk3229 evaluation board has one usb otg controller
and three usb host controllers. Each usb controller connect
with one usb2 phy port through UTMI+ interface. And the three
usb host interfaces use the same GPIO VBUS drive. Let's enable
them to support usb on rk3229 evb board.

Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 14:11:57 +02:00
William Wu
3880af4541 ARM: dts: rockchip: add usb nodes on rk322x
This patch adds usb otg/host controllers and phys nodes on rk322x.

Signed-off-by: William Wu <william.wu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
2017-06-02 14:09:22 +02:00
Sara Sharon
d6d517b773 iwlwifi: add wait for tx queue empty
Now that we have 512 queues, add a wait for single TX
queue to gen2.
This replaces gen1 wait_tx_queues_empty, which was limited
to 32 queues.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:14:12 +03:00
Johannes Berg
3a07d36c2d iwlwifi: mvm: fix many kernel-doc warnings
Fix many kernel-doc warnings. In one case, this required adding
a new enum value to be able to document things properly.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:10:45 +03:00
Johannes Berg
e4eb275ac5 iwlwifi: mvm: remove unused REPLY_MAX
This value is unused, and there's no reason we'd ever use it.
Just remove it.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:10:44 +03:00
Johannes Berg
69d22e737e iwlwifi: kernel-doc: make proper links
Using %enum instead of &enum (and in one case, %struct) results in
the wrong parsing. Fix that so that if documentation is generated,
the result is clickable links.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:10:44 +03:00
Johannes Berg
b1e06c65fb iwlwifi: mvm: remove unused TX_CMD_NEXT_FRAME_*
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:10:43 +03:00
Haim Dreyfuss
0705b953ee iwlwifi: Add fw_name_pre_rf_next_step to support different rf steps
Integrated chip may have different HW and RF steps.
Currently, the driver supports only different HW steps.
Add logic to support different RF steps enables combining different
HW and RF steps.

Signed-off-by: Haim Dreyfuss <haim.dreyfuss@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:10:41 +03:00
Liad Kaufman
5538409ba3 iwlwifi: pcie: support page dumping in wrt in gen2
In gen2, page dumping needs to be done in the trans
layer, as it is the one with access to the paging
pointers.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:54 +03:00
Liad Kaufman
2ba57c8bf9 iwlwifi: mvm: remove wrt support of page dumps in gen2
In gen2, page dumping should be done in transport
layer, since the addresses needed for the paging
mechanism reside there.

Signed-off-by: Liad Kaufman <liad.kaufman@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:53 +03:00
Johannes Berg
15fc196d6e iwlwifi: mvm: document structures used by commands
Add documentation to a lot of command IDs that links to the
appropriate structure(s) used with those IDs. In one case,
actually add and use a new struct for that purpose.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:53 +03:00
Johannes Berg
d69f0a2d88 iwlwifi: mvm: create/name various enums
Some values should be in enums so documentation can refer to
them, some values should be named for the same reason.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:52 +03:00
Johannes Berg
4d151c2e22 iwlwifi: mvm: disentangle binding command versions
The comments/size of the different binding commands get lost
in documentation, so introduce two different command structs
that can be used there.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:52 +03:00
Sara Sharon
a85281ebde iwlwifi: update device ID for a000 family
Three configurations will share device ID 2720, and will
be differentiated by RF ID.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:51 +03:00
Johannes Berg
6762586517 iwlwifi: mvm: add documentation links to various fields
Link various fields to the documentation of the enums that
define their values.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:51 +03:00
Johannes Berg
31a658b2af iwlwifi: mvm: fix some kernel-doc
This mostly fixes missing tags/struct names, but also some other
things. Lots of issues remain though.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:50 +03:00
Sara Sharon
0b90964a26 iwlwifi: mvm: wait for the flushed queue only
The function flushed only agg queue and no more traffic
is queued on it.
However, it waits for all queues to empty, which is not
necessary and may take more time.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:50 +03:00
Johannes Berg
816dc0bc54 iwlwifi: mvm: add documentation to some WoWLAN commands
Add some documentation for the WoWLAN commands, also linking the
correct enums used.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:50 +03:00
Johannes Berg
3b43fbcac4 iwlwifi: mvm: disentangle paging command structs
Instead of using a union and hard-coding the size difference,
declare both command structs properly, use a union on the
stack to build them and the right sizeof() for the size.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:49 +03:00
Johannes Berg
aed35826d6 iwlwifi: mvm: use u8 for reserved fields
There's no saying what kind of type a reserved field will
get in the future, so use u8 arrays to reserve space.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:49 +03:00
Johannes Berg
56c1f3c4bd iwlwifi: mvm: fix MCC endianness bug
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:48 +03:00
Johannes Berg
3dc6dd9698 iwlwifi: mvm: use proper sta_addr in firmware API
There's no point to declare an address as a __le32/__le16
and then only take a pointer to it anyway, change that to
just a sta_addr[ETH_ALEN].

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:48 +03:00
Johannes Berg
72361c3d28 iwlwifi: mvm: document which group enums are used with which group ID
Make it explicit which command definition enum is supposed to be
used with which command group, rather than relying on being able
to figure it out by name.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:47 +03:00
Johannes Berg
6909afcade iwlwifi: mvm: fix endianness in lq_cmd declaration
This member doesn't seem to be used, so this doesn't really
fix anything, but it's better to have the right type there.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:47 +03:00
Sara Sharon
d4f3695ecc iwlwifi: mvm: support old method of NVM parsing
Add configuration for allowing driver's nvm parsing and
bypassing the new host command, for debugging.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:46 +03:00
Sara Sharon
e9e1ba3dbf iwlwifi: mvm: support getting nvm data from firmware
This API replaces the complex NVM parsing of the iwlwifi module.
Instead, we get all needed data from firmware.

Signed-off-by: Sara Sharon <sara.sharon@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
2017-06-02 14:07:36 +03:00
Matt Brown
f718d426d7 powerpc/lib/xor_vmx: Ensure no altivec code executes before enable_kernel_altivec()
The xor_vmx.c file is used for the RAID5 xor operations. In these functions
altivec is enabled to run the operation and then disabled.

The code uses enable_kernel_altivec() around the core of the algorithm, however
the whole file is built with -maltivec, so the compiler is within its rights to
generate altivec code anywhere. This has been seen at least once in the wild:

  0:mon> di $xor_altivec_2
  c0000000000b97d0  3c4c01d9	addis   r2,r12,473
  c0000000000b97d4  3842db30	addi    r2,r2,-9424
  c0000000000b97d8  7c0802a6	mflr    r0
  c0000000000b97dc  f8010010	std     r0,16(r1)
  c0000000000b97e0  60000000	nop
  c0000000000b97e4  7c0802a6	mflr    r0
  c0000000000b97e8  faa1ffa8	std     r21,-88(r1)
  ...
  c0000000000b981c  f821ff41	stdu    r1,-192(r1)
  c0000000000b9820  7f8101ce	stvx    v28,r1,r0		<-- POP
  c0000000000b9824  38000030	li      r0,48
  c0000000000b9828  7fa101ce	stvx    v29,r1,r0
  ...
  c0000000000b984c  4bf6a06d	bl      c0000000000238b8 # enable_kernel_altivec

This patch splits the non-altivec code into xor_vmx_glue.c which calls the
altivec functions in xor_vmx.c. By compiling xor_vmx_glue.c without
-maltivec we can guarantee that altivec instruction will not be executed
outside of the enable/disable block.

Signed-off-by: Matt Brown <matthew.brown.dev@gmail.com>
[mpe: Rework change log and include disassembly]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-02 20:17:52 +10:00
Hari Bathini
48a316e350 powerpc/fadump: Set an upper limit for boot memory size
By default, 5% of system RAM is reserved for preserving boot memory.
Alternatively, a user can specify the amount of memory to reserve.
See Documentation/powerpc/firmware-assisted-dump.txt for details. In
addition to the memory reserved for preserving boot memory, some more
memory is reserved, to save HPTE region, CPU state data and ELF core
headers.

Memory Reservation during first kernel looks like below:

  Low memory                                        Top of memory
  0      boot memory size                                       |
  |           |                       |<--Reserved dump area -->|
  V           V                       |   Permanent Reservation V
  +-----------+----------/ /----------+---+----+-----------+----+
  |           |                       |CPU|HPTE|  DUMP     |ELF |
  +-----------+----------/ /----------+---+----+-----------+----+
        |                                           ^
        |                                           |
        \                                           /
         -------------------------------------------
          Boot memory content gets transferred to
          reserved area by firmware at the time of
          crash

This implicitly means that the sum of the sizes of boot memory, CPU
state data, HPTE region, DUMP preserving area and ELF core headers
can't be greater than the total memory size. But currently, a user is
allowed to specify any value as boot memory size. So, the above rule
is violated when a boot memory size around 50% of the total available
memory is specified. As the kernel is not handling this currently, it
may lead to undefined behavior. Fix it by setting an upper limit for
boot memory size to 25% of the total available memory. Also, instead
of using memblock_end_of_DRAM(), which doesn't take the holes, if any,
in the memory layout into account, use memblock_phys_mem_size() to
calculate the percentage of total available memory.

Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-02 20:16:50 +10:00
Hari Bathini
e7467dc694 powerpc/fadump: Update comment about offset where fadump is reserved
With commit f6e6bedb77 ("powerpc/fadump: Reserve memory at an offset
closer to bottom of RAM"), memory for fadump is no longer reserved at
the top of RAM. But there are still a few places which say so. Change
them appropriately.

Signed-off-by: Hari Bathini <hbathini@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2017-06-02 20:16:49 +10:00