This function iterates over net_namespace_list and flushes
the queue for every of them. What does this rtnl_lock()
protects?! Since we may add skbs to net::wext_nlevents
without rtnl_lock(), it does not protects us about queuers.
It guarantees, two threads can't flush the queue in parallel,
that can change the order, but since skb can be queued
in any order, it doesn't matter, how many threads do this
in parallel. In case of several threads, this will be even
faster.
So, we can remove rtnl_lock() here, as it was used for
iteration over net_namespace_list only.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
rtnl_lock() is used everywhere, and contention is very high.
When someone wants to iterate over alive net namespaces,
he/she has no a possibility to do that without exclusive lock.
But the exclusive rtnl_lock() in such places is overkill,
and it just increases the contention. Yes, there is already
for_each_net_rcu() in kernel, but it requires rcu_read_lock(),
and this can't be sleepable. Also, sometimes it may be need
really prevent net_namespace_list growth, so for_each_net_rcu()
is not fit there.
This patch introduces new rw_semaphore, which will be used
instead of rtnl_mutex to protect net_namespace_list. It is
sleepable and allows not-exclusive iterations over net
namespaces list. It allows to stop using rtnl_lock()
in several places (what is made in next patches) and makes
less the time, we keep rtnl_mutex. Here we just add new lock,
while the explanation of we can remove rtnl_lock() there are
in next patches.
Fine grained locks generally are better, then one big lock,
so let's do that with net_namespace_list, while the situation
allows that.
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
In core.c, some function descriptions do not match function
definitions. Just fix these mismatches.
Signed-off-by: Xiaolei Li <xiaolei.li@mediatek.com>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
This patch spits out the time taken by the various steps in the
journal recover process. Previously, the journal recovery time
didn't account for finding the journal head in the log which takes
up a significant portion of time.
Signed-off-by: Abhi Das <adas@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
It turns out that the loop where we read manufacturer
jedec_read_mfd() can under some circumstances get a
CFI_MFR_CONTINUATION repeatedly, making the loop go
over all banks and eventually hit the end of the
map and crash because of an access violation:
Unable to handle kernel paging request at virtual address c4980000
pgd = (ptrval)
[c4980000] *pgd=03808811, *pte=00000000, *ppte=00000000
Internal error: Oops: 7 [#1] PREEMPT ARM
CPU: 0 PID: 1 Comm: swapper Not tainted 4.16.0-rc1+ #150
Hardware name: Gemini (Device Tree)
PC is at jedec_probe_chip+0x6ec/0xcd0
LR is at 0x4
pc : [<c03a2bf4>] lr : [<00000004>] psr: 60000013
sp : c382dd18 ip : 0000ffff fp : 00000000
r10: c0626388 r9 : 00020000 r8 : c0626340
r7 : 00000000 r6 : 00000001 r5 : c3a71afc r4 : c382dd70
r3 : 00000001 r2 : c4900000 r1 : 00000002 r0 : 00080000
Flags: nZCv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none
Control: 0000397f Table: 00004000 DAC: 00000053
Process swapper (pid: 1, stack limit = 0x(ptrval))
Fix this by breaking the loop with a return 0 if
the offset exceeds the map size.
Fixes: 5c9c11e1c4 ("[MTD] [NOR] Add support for flash chips with ID in bank other than 0")
Cc: <stable@vger.kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Today if we run xfs_fsr and crash[1], log replay can fail because
the recovery code tries to instantiate the donor inode from
disk to replay the swapext, but it's been deleted and we get
verifier failures when we try to read the inode off disk with
i_mode == 0.
This fixes both sides: We don't log the swapext change if the
inode has been deleted, and we don't try to recover it either.
[1] or if systemd doesn't cleanly unmount root, as it is wont
to do ...
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
musb->endpoints[] has array size MUSB_C_NUM_EPS.
We must check array bounds before accessing the array and not afterwards.
Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Bin Liu <b-liu@ti.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Florian Fainelli says:
====================
net: bgmac: Couple of small bgmac changes
This patch series addresses two minor issues with the bgmac driver:
- provides the interface name through /proc/interrupts rather than "bgmac"
- makes sure the interrupts are masked during probe, in case the block was
not properly reset
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
We can have interrupts left enabled form e.g: the bootloader which used
the network device for network boot. Make sure we have those disabled as
early as possible to avoid spurious interrupts.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
When the system contains several BGMAC adapters, it is nice to be able
to tell which one is which by looking at /proc/interrupts. Use the
network device name as a name to request_irq() with.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
David Howells says:
====================
rxrpc: Tracing updates
Here are some patches that update tracing in AF_RXRPC and AFS:
(1) Add a tracepoint for tracking resend events.
(2) Use debug_ids in traces rather than pointers (as pointers are now hashed)
and allow use of the same debug_id in AFS calls as in the corresponding
AF_RXRPC calls. This makes filtering the trace output much easier.
(3) Add a tracepoint for tracking call completion.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Add support for the National Instruments XGE 1/10G network device.
It uses the EEPROM on the board via NVMEM.
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
This adds bindings for the NI XGE 1G/10G network device.
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Moritz Fischer <mdf@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
My recent change to netvsc drive in how receive flags are handled
broke multicast. The Hyper-v/Azure virtual interface there is not a
multicast filter list, filtering is only all or none. The driver must
enable all multicast if any multicast address is present.
Fixes: 009f766ca2 ("hv_netvsc: filter multicast/broadcast")
Signed-off-by: Stephen Hemminger <sthemmin@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Description:
Crash was reported with syzkaller pointing to lan78xx_write_reg routine.
Root-cause:
Proper cleanup of workqueues and init/setup routines was not happening
in failure conditions.
Fix:
Handled the error conditions by cleaning up the queues and init/setup
routines.
Fixes: 55d7de9de6 ("Microchip's LAN7800 family USB 2/3 to 10/100/1000 Ethernet device driver")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Raghuram Chary J <raghuramchary.jallipalli@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Steffen Klassert says:
====================
pull request (net-next): ipsec-next 2018-03-29
1) Remove a redundant pointer initialization esp_input_set_header().
From Colin Ian King.
2) Mark the xfrm kmem_caches as __ro_after_init.
From Alexey Dobriyan.
3) Do the checksum for an ipsec offlad packet in software
if the device does not advertise NETIF_F_HW_ESP_TX_CSUM.
From Shannon Nelson.
4) Use booleans for true and false instead of integers
in xfrm_policy_cache_flush().
From Gustavo A. R. Silva
Please pull or let me know if there are problems.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
In ca8210_test_int_user_write() a user can request the transfer of a
frame with a length field (command.length) that is longer than the
actual buffer provided (len). In this scenario the driver will copy
the buffer contents into the uninitialised command[] buffer, then
transfer <data.length> bytes over the SPI even though only <len> bytes
had been populated, potentially leaking sensitive kernel memory.
Also the first 6 bytes of the command buffer must be initialised in case
a malformed, short packet is written and the uninitialised bytes are
read in ca8210_test_check_upstream.
Reported-by: Domen Puncer Kugler <domen.puncer@samsung.com>
Signed-off-by: Harry Morris <h.morris@cascoda.com>
Tested-by: Harry Morris <h.morris@cascoda.com>
Signed-off-by: Stefan Schmidt <stefan@osg.samsung.com>
Steffen Klassert says:
====================
pull request (net): ipsec 2018-03-29
1) Fix a rcu_read_lock/rcu_read_unlock imbalance
in the error path of xfrm_local_error().
From Taehee Yoo.
2) Some VTI MTU fixes. From Stefano Brivio.
3) Fix a too early overwritten skb control buffer
on xfrm transport mode.
Please note that this pull request has a merge conflict
in net/ipv4/ip_tunnel.c.
The conflict is between
commit f6cc9c054e ("ip_tunnel: Emit events for post-register MTU changes")
from the net tree and
commit 24fc79798b ("ip_tunnel: Clamp MTU to bounds on new link")
from the ipsec tree.
It can be solved as it is currently done in linux-next.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
syszbot reported the following debugobjects splat:
ODEBUG: object is on stack, but not annotated
WARNING: CPU: 0 PID: 4185 at lib/debugobjects.c:328
RIP: 0010:debug_object_is_on_stack lib/debugobjects.c:327 [inline]
debug_object_init+0x17/0x20 lib/debugobjects.c:391
debug_hrtimer_init kernel/time/hrtimer.c:410 [inline]
debug_init kernel/time/hrtimer.c:458 [inline]
hrtimer_init+0x8c/0x410 kernel/time/hrtimer.c:1259
alarm_init kernel/time/alarmtimer.c:339 [inline]
alarm_timer_nsleep+0x164/0x4d0 kernel/time/alarmtimer.c:787
SYSC_clock_nanosleep kernel/time/posix-timers.c:1226 [inline]
SyS_clock_nanosleep+0x235/0x330 kernel/time/posix-timers.c:1204
do_syscall_64+0x281/0x940 arch/x86/entry/common.c:287
entry_SYSCALL_64_after_hwframe+0x42/0xb7
This happens because the hrtimer for the alarm nanosleep is on stack, but
the code does not use the proper debug objects initialization.
Split out the code for the allocated use cases and invoke
hrtimer_init_on_stack() for the nanosleep related functions.
Reported-by: syzbot+a3e0726462b2e346a31d@syzkaller.appspotmail.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: John Stultz <john.stultz@linaro.org>
Cc: syzkaller-bugs@googlegroups.com
Link: https://lkml.kernel.org/r/alpine.DEB.2.21.1803261528270.1585@nanos.tec.linutronix.de
Instead of zeroing out fallocated blocks in gfs2_iomap_alloc, zero them
out in fallocate_chunk, much higher up the call stack. This gets rid of
gfs2's abuse of the IOMAP_ZERO flag as well as the gfs2 specific zeronew
buffer flag. I can't think of a reason why zeroing out the blocks in
gfs2_iomap_alloc would have any benefits: there is no additional locking
at that level that would add protection to the newly allocated blocks.
While at it, change fallocate over from gs2_block_map to gfs2_iomap_begin.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Acked-by: Christoph Hellwig <hch@lst.de>
- There are three PHY lanes on iMX8QM, and can be
used in the following three cases
1. a two lanes PCIE_A, and a single lane SATA.
2. a single lane PCIE_A, a single lane PCIE_B
and a single lane SATA.
3. a two lanes PCIE_A, and a single lane PCIE_B.
The configuration of the iMX8QM AHCI SATA is relied
on the usage of PCIE ports in the case 1 and 2.
Use standalone iMX8 AHCI SATA probe and enable
functions to enable iMX8QM AHCI SATA support.
- To save power consumption, PHY CLKs can be gated
off after the configurations are done.
- The impedance ratio should be configured refer to
differnet REXT values.
0x6c <--> REXT value is 85Ohms
0x80 (default value) <--> REXT value is 100Ohms.
In general, REXT value should be 85ohms in standalone
PCIE HW board design, and 100ohms in SATA standalone
HW board design.
When the PCIE and the SATA are enabled simultaneously
in the HW board design. The REXT value would be set
to 85ohms.
Configure the SATA PHY impedance ratio to 0x6c in
default.
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
It's not entirely unreasonable for io-pgtable-arm to be built for
configurations with 32-bit phys_addr_t, where the compiler rightly
raises a warning about the 36-bit shift. That particular code path
should never actually *run* on those systems, but we still want it
to compile cleanly, which is easily done by using an unambiguous u64
as the intermediate type instead.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Apparently, some APs are buggy enough to send a zeroed
WMM IE. Don't WARN on this since this is not caused by a bug
on the client's system.
This aligns the condition of the WARNING in drv_conf_tx
with the validity check in ieee80211_sta_wmm_params.
We will now pick the default values whenever we get
a zeroed WMM IE.
This has been reported here:
https://bugzilla.kernel.org/show_bug.cgi?id=199161
Fixes: f409079bb6 ("mac80211: sanity check CW_min/CW_max towards driver")
Signed-off-by: Emmanuel Grumbach <emmanuel.grumbach@intel.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
ath.git patches for 4.17. Major changes:
ath10k
* enable chip temperature measurement for QCA6174/QCA9377
* add firmware memory dump for QCA9984
* enable buffer STA on TDLS link for QCA6174
* support different beacon internals in multiple interface scenario
for QCA988X/QCA99X0/QCA9984/QCA4019
The lock debug output in print_lock() has a few shortcomings:
- It prints the hlock->acquire_ip field in %px and %pS format. That's
redundant information.
- It lacks information about the lock object itself. The lock class is
not helpful to identify a particular instance of a lock.
Change the output so it prints:
- hlock->instance to allow identification of a particular lock instance.
- only the %pS format of hlock->ip_acquire which is sufficient to decode
the actual code line with faddr2line.
The resulting output is:
3 locks held by a.out/31106:
#0: 00000000b0f753ba (&mm->mmap_sem){++++}, at: copy_process.part.41+0x10d5/0x1fe0
#1: 00000000ef64d539 (&mm->mmap_sem/1){+.+.}, at: copy_process.part.41+0x10fe/0x1fe0
#2: 00000000b41a282e (&mapping->i_mmap_rwsem){++++}, at: copy_process.part.41+0x12f2/0x1fe0
[ tglx: Massaged changelog ]
Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michal Hocko <mhocko@suse.com>
Acked-by: David Rientjes <rientjes@google.com>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Cc: linux-mm@kvack.org
Cc: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/201803271941.GBE57310.tVSOJLQOFFOHFM@I-love.SAKURA.ne.jp
Alexander writes:
stm class/intel_th: Updates for 4.17
These are:
* Mass conversion to GPL-2 SPDX header
* Moved "hwtracing" to now its own submenu, to uncrowd the parent menu a bit
* Added MAINTAINERS entry for drivers/hwtracing
* Somewhat small Trace Hub fixes
* Added ACPI glue layer for the Trace Hub
* Added more module parameters to dummy_stm for better test coverage
This is the EAPoL over nl80211 patchset from Denis Kenzior, minus some
infrastructure patches I'd split out and applied earlier. Denis described
it as follows:
This patchset adds support for running 802.11 authentication mechanisms (e.g.
802.1X, 4-Way Handshake, etc) over NL80211 instead of putting them onto the
network device. This has the advantage of fixing several long-standing race
conditions that result from userspace operating on multiple transports in order
to manage a 802.11 connection (e.g. NL80211 and wireless netdev, wlan0, etc).
For example, userspace would sometimes see 4-Way handshake packets before
NL80211 signaled that the connection has been established. Leading to ugly
hacks or having the STA wait for retransmissions from the AP.
This also provides a way to mitigate a particularly nasty race condition where
the encryption key could be set prior to the 4-way handshake packet 4/4 being
sent. This would result in the packet being sent encrypted and discarded by
the peer. The mitigation strategy for this race is for userspace to explicitly
tell the kernel that a particular EAPoL packet should not be encrypted.
To make this possible this patchset introduces a new NL80211 command and several
new attributes. A userspace that is capable of processing EAPoL packets over
NL80211 includes a new NL80211_ATTR_CONTROL_PORT_OVER_NL80211 attribute in its
NL80211_CMD_ASSOCIATE or NL80211_CMD_CONNECT requests being sent to the kernel.
The previously added NL80211_ATTR_SOCKET_OWNER attribute must also be included.
The latter is used by the kernel to send NL80211_CMD_CONTROL_PORT_FRAME
notifications back to userspace via a netlink unicast. If the
NL80211_ATTR_CONTROL_PORT_OVER_NL80211 attribute is not specified, then legacy
behavior is kept and control port packets continue to flow over the network
interface.
If control port over nl80211 transport is requested, then control port packets
are intercepted just prior to being handed to the network device and sent over
netlink via the NL80211_CMD_CONTROL_PORT_FRAME notification.
NL80211_ATTR_CONTROL_PORT_ETHERTYPE and NL80211_ATTR_MAC are included to
specify the control port frame protocol and source address respectively. If
the control port frame was received unencrypted then
NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT flag is also included. NL80211_ATTR_FRAME
attribute contains the raw control port frame with all transport layer headers
stripped (e.g. this would be the raw EAPoL frame).
Userspace can reply to control port frames either via legacy methods (by sending
frames to the network device) or via NL80211_CMD_CONTROL_PORT_FRAME request.
Userspace would included NL80211_ATTR_FRAME with the raw control port frame as
well as NL80211_Attr_MAC and NL80211_ATTR_CONTROL_PORT_ETHERTYPE attributes to
specify the destination address and protocol respectively. This allows
Pre-Authentication (protocol 0x88c7) frames to be sent via this mechanism as
well. Finally, NL80211_ATTR_CONTROL_PORT_NO_ENCRYPT flag can be included to
tell the driver to send the frame unencrypted, e.g. for 4-Way handshake 4/4
frames.
The proposed patchset has been tested in a mac80211_hwsim based environment with
hostapd and iwd.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
If userspace requested control port frames to go over 80211, then do so.
The control packets are intercepted just prior to delivery of the packet
to the underlying network device.
Pre-authentication type frames (protocol: 0x88c7) are also forwarded
over nl80211.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit implements the TX side of NL80211_CMD_CONTROL_PORT_FRAME.
Userspace provides the raw EAPoL frame using NL80211_ATTR_FRAME.
Userspace should also provide the destination address and the protocol
type to use when sending the frame. This is used to implement TX of
Pre-authentication frames. If CONTROL_PORT_ETHERTYPE_NO_ENCRYPT is
specified, then the driver will be asked not to encrypt the outgoing
frame.
A new EXT_FEATURE flag is introduced so that nl80211 code can check
whether a given wiphy has capability to pass EAPoL frames over nl80211.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit also adds cfg80211_rx_control_port function. This is used
to generate a CMD_CONTROL_PORT_FRAME event out to userspace. The
conn_owner_nlportid is used as the unicast destination. This means that
userspace must specify NL80211_ATTR_SOCKET_OWNER flag if control port
over nl80211 routing is requested in NL80211_CMD_CONNECT,
NL80211_CMD_ASSOCIATE, NL80211_CMD_START_AP or IBSS/mesh join.
Signed-off-by: Denis Kenzior <denkenz@gmail.com>
[johannes: fix return value of cfg80211_rx_control_port()]
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Pull irqchip updates for 4.17 from Marc Zyngier:
- New Qualcomm PDC irqchip
- New Microsemi Ocelot irqchip
- Suspend/resume support for some oddball GICv3 irqchip
- Better GIC/GICv3 support for kexec
- Various cleanups and fixes
Rik reports that he sees an increase in CPU use in one benchmark
due to commit 612f1a22f067 "cpuidle: poll_state: Add time limit to
poll_idle()" that caused poll_idle() to call local_clock() in every
iteration of the loop. Utilization increase generally means more
non-idle time with respect to total CPU time (on the average) which
implies reduced CPU frequency.
Doug reports that limiting the rate of local_clock() invocations
in there causes much less power to be drawn during a CPU-intensive
parallel workload (with idle states 1 and 2 disabled to enforce more
state 0 residency).
These two reports together suggest that executing local_clock() on
multiple CPUs in parallel at a high rate may cause chips to get hot
and trigger thermal/power limits on them to kick in, so reduce the
rate of local_clock() invocations in poll_idle() to avoid that issue.
Fixes: 612f1a22f067 "cpuidle: poll_state: Add time limit to poll_idle()"
Reported-by: Rik van Riel <riel@surriel.com>
Reported-by: Doug Smythies <dsmythies@telus.net>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Rik van Riel <riel@surriel.com>
Reviewed-by: Rik van Riel <riel@surriel.com>
Add a new attribute group called "s2idle" under the sysfs directory
of each cpuidle state that supports the ->enter_s2idle callback
and put two new attributes, "usage" and "time", into that group to
represent the number of times the given state was requested for
suspend-to-idle and the total time spent in suspend-to-idle after
requesting that state, respectively.
That will allow diagnostic information related to suspend-to-idle
to be collected without enabling advanced debug features and
analyzing dmesg output.
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
All the needed code has been already merged to mach-exynos core in
commit af9971144d ("ARM: EXYNOS: add coupled cpuidle support for
Exynos3250"), so enable support for coupled variant also for Exynos3250
SoCs.
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
If poll_idle() is allowed to spin until need_resched() returns 'true',
it may actually spin for a much longer time than expected by the idle
governor, since set_tsk_need_resched() is not always called by the
timer interrupt handler. If that happens, the CPU may spend much
more time than anticipated in the "polling" state.
To prevent that from happening, limit the time of the spinning loop
in poll_idle().
Suggested-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Doug Smythies <dsmythies@telus.net>
Most MMIO GIC register accesses use a 1-hot bit scheme that
avoids requiring any form of locking. This isn't true for the
GICD_ICFGRn registers, which require a RMW sequence.
Unfortunately, we seem to be missing a lock for these particular
accesses, which could result in a race condition if changing the
trigger type on any two interrupts within the same set of 16
interrupts (and thus controlled by the same CFGR register).
Introduce a private lock in the GIC common comde for this
particular case, making it cover both GIC implementations
in one go.
Cc: stable@vger.kernel.org
Signed-off-by: Aniruddha Banerjee <aniruddhab@nvidia.com>
[maz: updated changelog]
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Make a "HW tracing support" menu and move 2 entries into it.
(No change in Coresight, which is ARM-specific and is only listed for
ARM & ARM64.)
This makes the Device Drivers menu more consistent and prevents these
drivers from being listed at the top level of the Device Drivers menu.
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com>
There would be some masters sharing the same IOMMU device. Put them in
the same iommu group and share the same iommu domain.
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
When the power domain is powered off, the IOMMU cannot be accessed and
register programming must be deferred until the power domain becomes
enabled.
Add runtime PM support, and use runtime PM device link from IOMMU to
master to enable and disable IOMMU.
Signed-off-by: Jeffy Chen <jeffy.chen@rock-chips.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
