The '__unreachable' and '__func_stack_frame_non_standard' sections are
only used at compile time. They're discarded for vmlinux but they
should also be discarded for modules.
Since this is a recurring pattern, prefix the section names with
".discard.". It's a nice convention and vmlinux.lds.h already discards
such sections.
Also remove the 'a' (allocatable) flag from the __unreachable section
since it doesn't make sense for a discarded section.
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Jessica Yu <jeyu@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: d1091c7fa3 ("objtool: Improve detection of BUG() and other dead ends")
Link: http://lkml.kernel.org/r/20170301180444.lhd53c5tibc4ns77@treble
Signed-off-by: Ingo Molnar <mingo@kernel.org>
workaround
- Revert contiguous bit support due to TLB conflict aborts in simulation
- Don't treat all CPU ID register fields as 4-bit quantities
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Will Deacon:
"The main fix here addresses a kernel panic triggered on Qualcomm
QDF2400 due to incorrect register usage in an erratum workaround
introduced during the merge window.
Summary:
- Fix kernel panic on specific Qualcomm platform due to broken
erratum workaround
- Revert contiguous bit support due to TLB conflict aborts in
simulation
- Don't treat all CPU ID register fields as 4-bit quantities"
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64/cpufeature: check correct field width when updating sys_val
Revert "arm64: mm: set the contiguous bit for kernel mappings where appropriate"
arm64: Avoid clobbering mm in erratum workaround on QDF2400
This will add stricter validating for RTA_MARK attribute.
Signed-off-by: Liping Zhang <zlpnobody@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The addr_gen_mode variable can be accessed by both sysctl and netlink.
Repleacd rtnl_lock() with rtnl_trylock() protect the sysctl operation to
avoid the possbile dead lock.`
Signed-off-by: Felix Jia <felix.jia@alliedtelesis.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Highlights include:
- An update of the disassembly code used by xmon to the latest versions in
binutils. We've received permission from all the authors of the relevant
binutils changes to relicense their changes to the relevant files from GPLv3
to GPLv2, for inclusion in Linux. Thanks to Peter Bergner for doing the leg
work to get permission from everyone.
- Addition of the "architected" Power9 CPU table entry, allowing us to boot
in Power9 architected mode under a hypervisor.
- Updates to the Power9 PMU code.
- Implementation of clear_bit_unlock_is_negative_byte() to optimise
unlock_page().
- Freescale updates from Scott: "Highlights include 8xx breakpoints and perf,
t1042rdb display support, and board updates."
Thanks to:
Al Viro, Andrew Donnellan, Aneesh Kumar K.V, Balbir Singh, Douglas Miller,
Frédéric Weisbecker, Gavin Shan, Madhavan Srinivasan, Michael Roth, Nathan
Fontenot, Naveen N. Rao, Nicholas Piggin, Peter Bergner, Paul E. McKenney,
Rashmica Gupta, Russell Currey, Sahil Mehta, Stewart Smith.
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Merge tag 'powerpc-4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux
Pull more powerpc updates from Michael Ellerman:
"Highlights include:
- an update of the disassembly code used by xmon to the latest
versions in binutils. We've received permission from all the
authors of the relevant binutils changes to relicense their changes
to the relevant files from GPLv3 to GPLv2, for inclusion in Linux.
Thanks to Peter Bergner for doing the leg work to get permission
from everyone.
- addition of the "architected" Power9 CPU table entry, allowing us
to boot in Power9 architected mode under a hypervisor.
- updates to the Power9 PMU code.
- implementation of clear_bit_unlock_is_negative_byte() to optimise
unlock_page().
- Freescale updates from Scott: "Highlights include 8xx breakpoints
and perf, t1042rdb display support, and board updates."
Thanks to:
Al Viro, Andrew Donnellan, Aneesh Kumar K.V, Balbir Singh, Douglas
Miller, Frédéric Weisbecker, Gavin Shan, Madhavan Srinivasan,
Michael Roth, Nathan Fontenot, Naveen N. Rao, Nicholas Piggin, Peter
Bergner, Paul E. McKenney, Rashmica Gupta, Russell Currey, Sahil
Mehta, Stewart Smith"
* tag 'powerpc-4.11-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (48 commits)
powerpc: Remove leftover cputime_to_nsecs call causing build error
powerpc/mm/hash: Always clear UPRT and Host Radix bits when setting up CPU
powerpc/optprobes: Fix TOC handling in optprobes trampoline
powerpc/pseries: Advertise Hot Plug Event support to firmware
cxl: fix nested locking hang during EEH hotplug
powerpc/xmon: Dump memory in CPU endian format
powerpc/pseries: Revert 'Auto-online hotplugged memory'
powerpc/powernv: Make PCI non-optional
powerpc/64: Implement clear_bit_unlock_is_negative_byte()
powerpc/powernv: Remove unused variable in pnv_pci_sriov_disable()
powerpc/kernel: Remove error message in pcibios_setup_phb_resources()
powerpc/mm: Fix typo in set_pte_at()
pci/hotplug/pnv-php: Disable MSI and PCI device properly
pci/hotplug/pnv-php: Disable surprise hotplug capability on conflicts
pci/hotplug/pnv-php: Remove WARN_ON() in pnv_php_put_slot()
powerpc: Add POWER9 architected mode to cputable
powerpc/perf: use is_kernel_addr macro in perf_get_misc_flags()
powerpc/perf: Avoid FAB_*_MATCH checks for power9
powerpc/perf: Add restrictions to PMC5 in power9 DD1
powerpc/perf: Use Instruction Counter value
...
INPUT_PROP_BUTTONPAD is currently only set through the platform data.
The RMI4 header doc says that this property is there to force the
buttonpad property, so we also need to detect it by looking at
the exported buttons count.
Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Reported-and-tested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A few last-minute fixes for rc1:
- ALSA core timer and sequencer fixes for bugs spotted by syzkaller
- A couple of trivial HD-audio fixups
- Additional PCI / codec IDs for Intel Geminilake
- Fixes for CT-XFi DMA mask bugs
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Merge tag 'sound-fix-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound
Pull sound fixes from Takashi Iwai:
"A few last-minute fixes for rc1:
- ALSA core timer and sequencer fixes for bugs spotted by syzkaller
- a couple of trivial HD-audio fixups
- additional PCI / codec IDs for Intel Geminilake
- fixes for CT-XFi DMA mask bugs"
* tag 'sound-fix-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound:
ALSA: seq: Fix link corruption by event error handling
ALSA: hda - Add subwoofer support for Dell Inspiron 17 7000 Gaming
ALSA: ctxfi: Fallback DMA mask to 32bit
ALSA: timer: Reject user params with too small ticks
ALSA: hda: Add Geminilake HDMI codec ID
ALSA: hda - Fix micmute hotkey problem for a lenovo AIO machine
ALSA: hda - Add Geminilake PCI ID
Jakub Kicinski says:
====================
VXLAN/geneve RCU fixes
VXLAN and GENEVE need to take RCU lock explicitly because TX path
only has the _bh() flavour of RCU locked. Making the reconfiguration
path wait for both normal and _bh() RCU would be bigger hassle so
just acquire the lock, as suggested by Pravin:
https://www.mail-archive.com/netdev@vger.kernel.org/msg155583.html
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
There is no guarantees that callers of the TX path will hold
the RCU lock. Grab it explicitly.
Fixes: fceb9c3e38 ("geneve: avoid using stale geneve socket.")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is no guarantees that callers of the TX path will hold
the RCU lock. Grab it explicitly.
Fixes: c6fcc4fc5f ("vxlan: avoid using stale vxlan socket.")
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pull thermal management updates from Zhang Rui:
- add thermal driver for R-Car Gen3 thermal sensors.
- add thermal driver for ZTE' zx2967 family thermal sensors.
- convert thermal ID allocation from IDR to IDA.
- fix a possible NULL dereference in imx thermal driver.
- fix a ti-soc-thermal driver dependency issue so that critical thermal
control is still available when CPU_THERMAL is not defined.
- update binding information for QorIQ thermal driver.
- a couple of cleanups in thermal core, intel_powerclamp, exynos,
dra752-thermal, mtk-thermal driver.
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/rzhang/linux:
powerpc/mpc85xx: Update TMU device tree node for T1023/T1024
powerpc/mpc85xx: Update TMU device tree node for T1040/T1042
dt-bindings: Update QorIQ TMU thermal bindings
thermal: mtk_thermal: Staticise a number of data variables
thermal: arm: dra752: Remove all TSHUT related definitions
thermal: arm: dra752: Remove TSHUT configuration
thermal: ti-soc-thermal: Remove CPU_THERMAL Dependency from TI_THERMAL
thermal: imx: Fix possible NULL dereference.
thermal: exynos: Remove parsing unused samsung,tmu_cal_mode property
thermal: zx2967: add thermal driver for ZTE's zx2967 family
thermal: use cpumask_var_t for on-stack cpu masks
dt: bindings: add documentation for zx2967 family thermal sensor
thermal/intel_powerclamp: Remove set-but-not-used variables
thermal: rcar_gen3_thermal: Add R-Car Gen3 thermal driver
thermal: rcar_gen3_thermal: Document the R-Car Gen3
thermal: convert devfreq_cooling to use an IDA
thermal: convert cpu_cooling to use an IDA
thermal: convert clock cooling to use an IDA
thermal core: convert ID allocation to IDA
While playing with mlx4 hardware timestamping of RX packets, I found
that some packets were received by TCP stack with a ~200 ms delay...
Since the timestamp was provided by the NIC, and my probe was added
in tcp_v4_rcv() while in BH handler, I was confident it was not
a sender issue, or a drop in the network.
This would happen with a very low probability, but hurting RPC
workloads.
A NAPI driver normally arms the IRQ after the napi_complete_done(),
after NAPI_STATE_SCHED is cleared, so that the hard irq handler can grab
it.
Problem is that if another point in the stack grabs NAPI_STATE_SCHED bit
while IRQ are not disabled, we might have later an IRQ firing and
finding this bit set, right before napi_complete_done() clears it.
This can happen with busy polling users, or if gro_flush_timeout is
used. But some other uses of napi_schedule() in drivers can cause this
as well.
thread 1 thread 2 (could be on same cpu, or not)
// busy polling or napi_watchdog()
napi_schedule();
...
napi->poll()
device polling:
read 2 packets from ring buffer
Additional 3rd packet is
available.
device hard irq
// does nothing because
NAPI_STATE_SCHED bit is owned by thread 1
napi_schedule();
napi_complete_done(napi, 2);
rearm_irq();
Note that rearm_irq() will not force the device to send an additional
IRQ for the packet it already signaled (3rd packet in my example)
This patch adds a new NAPI_STATE_MISSED bit, that napi_schedule_prep()
can set if it could not grab NAPI_STATE_SCHED
Then napi_complete_done() properly reschedules the napi to make sure
we do not miss something.
Since we manipulate multiple bits at once, use cmpxchg() like in
sk_busy_loop() to provide proper transactions.
In v2, I changed napi_watchdog() to use a relaxed variant of
napi_schedule_prep() : No need to set NAPI_STATE_MISSED from this point.
In v3, I added more details in the changelog and clears
NAPI_STATE_MISSED in busy_poll_stop()
In v4, I added the ideas given by Alexander Duyck in v3 review
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Alexander Duyck <alexander.duyck@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Bitwise & was obviously intended here.
Fixes: 745d8ae462 ("net/mlx4: Spoofcheck and zero MAC can't coexist")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The call to asix_write_medium_mode is not updating the return code ret
and yet ret is being checked for an error. Fix this by assigning ret to
the return code from the call asix_write_medium_mode.
Detected by CoverityScan, CID#1357148 ("Logically Dead Code")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The email address of Jan Dumon bounces, and there is not relevant information
in the linked website.
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: David S. Miller <davem@davemloft.net>
When the structure of the LPM tree changes (f.e., due to the addition of
a new prefix), we unbind the old tree and then bind the new one. This
may result in temporary packet loss.
Instead, overwrite the old binding with the new one.
Fixes: 6b75c4807d ("mlxsw: spectrum_router: Add virtual router management")
Signed-off-by: Ido Schimmel <idosch@mellanox.com>
Signed-off-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
The variables rds_ib_mr_1m_pool_size and rds_ib_mr_8k_pool_size
are used only in the ib.c file. As such, the static type is
added to limit them in this file.
Cc: Joe Jin <joe.jin@oracle.com>
Cc: Junxiao Bi <junxiao.bi@oracle.com>
Signed-off-by: Zhu Yanjun <yanjun.zhu@oracle.com>
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Commit cd2b708750 ("sctp: check duplicate node before inserting a
new transport") called rhltable_lookup() to check for the duplicate
transport node in transport rhashtable.
But rhltable_lookup() doesn't call rcu_read_lock inside, it could cause
a use-after-free issue if it tries to dereference the node that another
cpu has freed it. Note that sock lock can not avoid this as it is per
sock.
This patch is to fix it by calling rcu_read_lock before checking for
duplicate transport nodes.
Fixes: cd2b708750 ("sctp: check duplicate node before inserting a new transport")
Reported-by: Andrey Konovalov <andreyknvl@google.com>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
All the routines by which rxrpc is accessed from the outside are serialised
by means of the socket lock (sendmsg, recvmsg, bind,
rxrpc_kernel_begin_call(), ...) and this presents a problem:
(1) If a number of calls on the same socket are in the process of
connection to the same peer, a maximum of four concurrent live calls
are permitted before further calls need to wait for a slot.
(2) If a call is waiting for a slot, it is deep inside sendmsg() or
rxrpc_kernel_begin_call() and the entry function is holding the socket
lock.
(3) sendmsg() and recvmsg() or the in-kernel equivalents are prevented
from servicing the other calls as they need to take the socket lock to
do so.
(4) The socket is stuck until a call is aborted and makes its slot
available to the waiter.
Fix this by:
(1) Provide each call with a mutex ('user_mutex') that arbitrates access
by the users of rxrpc separately for each specific call.
(2) Make rxrpc_sendmsg() and rxrpc_recvmsg() unlock the socket as soon as
they've got a call and taken its mutex.
Note that I'm returning EWOULDBLOCK from recvmsg() if MSG_DONTWAIT is
set but someone else has the lock. Should I instead only return
EWOULDBLOCK if there's nothing currently to be done on a socket, and
sleep in this particular instance because there is something to be
done, but we appear to be blocked by the interrupt handler doing its
ping?
(3) Make rxrpc_new_client_call() unlock the socket after allocating a new
call, locking its user mutex and adding it to the socket's call tree.
The call is returned locked so that sendmsg() can add data to it
immediately.
From the moment the call is in the socket tree, it is subject to
access by sendmsg() and recvmsg() - even if it isn't connected yet.
(4) Lock new service calls in the UDP data_ready handler (in
rxrpc_new_incoming_call()) because they may already be in the socket's
tree and the data_ready handler makes them live immediately if a user
ID has already been preassigned.
Note that the new call is locked before any notifications are sent
that it is live, so doing mutex_trylock() *ought* to always succeed.
Userspace is prevented from doing sendmsg() on calls that are in a
too-early state in rxrpc_do_sendmsg().
(5) Make rxrpc_new_incoming_call() return the call with the user mutex
held so that a ping can be scheduled immediately under it.
Note that it might be worth moving the ping call into
rxrpc_new_incoming_call() and then we can drop the mutex there.
(6) Make rxrpc_accept_call() take the lock on the call it is accepting and
release the socket after adding the call to the socket's tree. This
is slightly tricky as we've dequeued the call by that point and have
to requeue it.
Note that requeuing emits a trace event.
(7) Make rxrpc_kernel_send_data() and rxrpc_kernel_recv_data() take the
new mutex immediately and don't bother with the socket mutex at all.
This patch has the nice bonus that calls on the same socket are now to some
extent parallelisable.
Note that we might want to move rxrpc_service_prealloc() calls out from the
socket lock and give it its own lock, so that we don't hang progress in
other calls because we're waiting for the allocator.
We probably also want to avoid calling rxrpc_notify_socket() from within
the socket lock (rxrpc_accept_call()).
Signed-off-by: David Howells <dhowells@redhat.com>
Tested-by: Marc Dionne <marc.c.dionne@auristor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This set contains mostly fixes to existing drivers as well as cleanup of
code that's not been in active use for a while.
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Merge tag 'pwm/for-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm
Pull pwm updates from Thierry Reding:
"This set contains mostly fixes to existing drivers as well as cleanup
of code that's not been in active use for a while"
* tag 'pwm/for-4.11-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/thierry.reding/linux-pwm: (27 commits)
acpi: lpss: call pwm_add_table() for BSW PWM device
pwm: Try to load modules during pwm_get()
pwm: Don't hold pwm_lookup_lock longer than necessary
pwm: Make the PWM_POLARITY flag in DTB optional
pwm: Print error messages with pr_err() instead of pr_debug()
pwm: imx: Add polarity inversion support to i.MX's PWMv2
pwm: imx: doc: Update imx-pwm.txt documentation entry
pwm: imx: Remove redundant i.MX PWMv2 code
pwm: imx: Provide atomic PWM support for i.MX PWMv2
pwm: imx: Move PWMv2 wait for fifo slot code to a separate function
pwm: imx: Move PWMv2 software reset code to a separate function
pwm: imx: Rewrite v1 code to facilitate switch to atomic PWM
pwm: imx: Add separate set of PWM ops for v1 and v2
pwm: imx: Remove ipg clock and enable per clock when required
pwm: lpss: Add Intel Gemini Lake PCI ID
pwm: lpss: Do not export board infos for different PWM types
pwm: lpss: Avoid reconfiguring while UPDATE bit is still enabled
pwm: lpss: Switch to new atomic API
pwm: lpss: Allow duty cycle to be 0
pwm: lpss: Avoid potential overflow of base_unit
...
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Merge tag 'drm-ast-2500-for-v4.11' of git://people.freedesktop.org/~airlied/linux
Pull drm AST2500 support from Dave Airlie:
"This is a set of changes to enable the AST2500 BMC hardware, and also
fix some bugs interacting with the older AST hardware.
Some of the bug fixes are cc'ed to stable"
* tag 'drm-ast-2500-for-v4.11' of git://people.freedesktop.org/~airlied/linux:
drm/ast: Call open_key before enable_mmio in POST code
drm/ast: Fix test for VGA enabled
drm/ast: POST code for the new AST2500
drm/ast: Rename ast_init_dram_2300 to ast_post_chip_2300
drm/ast: Factor mmc_test code in POST code
drm/ast: Fixed vram size incorrect issue on POWER
drm/ast: Base support for AST2500
drm/ast: Fix calculation of MCLK
drm/ast: Remove spurious include
drm/ast: const'ify mode setting tables
drm/ast: Handle configuration without P2A bridge
drm/ast: Fix AST2400 POST failure without BMC FW or VBIOS
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Merge tag 'drm-fixes-for-v4.11-rc1' of git://people.freedesktop.org/~airlied/linux
Pull drm fixes from Dave Airlie:
"Misc fixes for v4.11-rc1.
This is a selection of fixes for recent bugs, the vmwgfx one is
important to avoid a regression, and compat ioctl one is pretty urgent
for stable. Otherwise nothing too much.
I've got a separate pull req for some AST hw IBM need to enable"
* tag 'drm-fixes-for-v4.11-rc1' of git://people.freedesktop.org/~airlied/linux:
dma-buf: add support for compat ioctl
drm/vmwgfx: Work around drm removal of control nodes
drm/rockchip: cdn-dp: Fix error handling
drm/rockchip: add extcon dependency for DP
drm: zte: fix static checker warning on variable 'fmt'
L2 fails to boot on a non-APICv box dues to 'commit 0ad3bed6c5
("kvm: nVMX: move nested events check to kvm_vcpu_running")'
KVM internal error. Suberror: 3
extra data[0]: 800000ef
extra data[1]: 1
RAX=0000000000000000 RBX=ffffffff81f36140 RCX=0000000000000000 RDX=0000000000000000
RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88007c92fe90 RSP=ffff88007c92fe90
R8 =ffff88007fccdca0 R9 =0000000000000000 R10=00000000fffedb3d R11=0000000000000000
R12=0000000000000003 R13=0000000000000000 R14=0000000000000000 R15=ffff88007c92c000
RIP=ffffffff810645e6 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0000 0000000000000000 ffffffff 00c00000
CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA]
SS =0000 0000000000000000 ffffffff 00c00000
DS =0000 0000000000000000 ffffffff 00c00000
FS =0000 0000000000000000 ffffffff 00c00000
GS =0000 ffff88007fcc0000 ffffffff 00c00000
LDT=0000 0000000000000000 ffffffff 00c00000
TR =0040 ffff88007fcd4200 00002087 00008b00 DPL=0 TSS64-busy
GDT= ffff88007fcc9000 0000007f
IDT= ffffffffff578000 00000fff
CR0=80050033 CR2=00000000ffffffff CR3=0000000001e0a000 CR4=003406e0
DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000
DR6=00000000fffe0ff0 DR7=0000000000000400
EFER=0000000000000d01
We should try to reinject previous events if any before trying to inject
new event if pending. If vmexit is triggered by L2 guest and L0 interested
in, we should reinject IDT-vectoring info to L2 through vmcs02 if any,
otherwise, we can consider new IRQs/NMIs which can be injected and call
nested events callback to switch from L2 to L1 if needed and inject the
proper vmexit events. However, 'commit 0ad3bed6c5 ("kvm: nVMX: move
nested events check to kvm_vcpu_running")' results in the handle events
order reversely on non-APICv box. This patch fixes it by bailing out for
pending events and not consider new events in this scenario.
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Wanpeng Li <wanpeng.li@hotmail.com>
Fixes: 0ad3bed6c5 ("kvm: nVMX: move nested events check to kvm_vcpu_running")
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
The pointer 'struct desc_struct *d' is unused since commit 8c2e41f7ae
("x86/kvm/vmx: Simplify segment_base()") so let's remove it.
Signed-off-by: Jérémy Lefaure <jeremy.lefaure@lse.epita.fr>
Reviewed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
This doesn't fully exercise the interaction between KVM and ioperm(),
but it does test basic functionality.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
In an earlier version of the patch ("x86/kvm/vmx: Defer TR reload
after VM exit") that introduced TSS limit validity tracking, I
confused which helper was which. On reflection, the names I chose
sucked. Rename the helpers to make it more obvious what's going on
and add some comments.
While I'm at it, clear __tss_limit_invalid when force-reloading as
well as when contitionally reloading, since any TR reload fixes the
limit.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
refcount_t type and corresponding API should be
used instead of atomic_t when the variable is used as
a reference counter. This allows to avoid accidental
refcounter overflows that might lead to use-after-free
situations.
Signed-off-by: Elena Reshetova <elena.reshetova@intel.com>
Signed-off-by: Hans Liljestrand <ishkamiel@gmail.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: David Windsor <dwindsor@gmail.com>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
The retu watchdog calls into the respective mfd driver, but fails to
link if that is diabled:
drivers/watchdog/built-in.o: In function `retu_wdt_set_timeout':
ziirave_wdt.c:(.text+0x8c88): undefined reference to `retu_write'
ziirave_wdt.c:(.text+0x8c88): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `retu_write'
drivers/watchdog/built-in.o: In function `retu_wdt_start':
ziirave_wdt.c:(.text+0x8cc8): undefined reference to `retu_write'
ziirave_wdt.c:(.text+0x8cc8): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `retu_write'
This restores the dependency as it was before
Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
When the db8500 watchdog is enabled without the PRCMU, we get a lot of
warnings about duplicate or missing helper functions:
In file included from drivers/watchdog/ux500_wdt.c:21:0:
include/linux/mfd/dbx500-prcmu.h:422:19: error: redefinition of 'prcmu_abb_read'
static inline int prcmu_abb_read(u8 slave, u8 reg, u8 *value, u8 size)
This restores the dependency as it was.
Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
gcc-4.3 can't decide whether the constant value in
kempld_prescaler[PRESCALER_21] is built-time constant or
not, and gets confused by the logic in do_div():
drivers/watchdog/kempld_wdt.o: In function `kempld_wdt_set_stage_timeout':
kempld_wdt.c:(.text.kempld_wdt_set_stage_timeout+0x130): undefined reference to `__aeabi_uldivmod'
This adds a call to ACCESS_ONCE() to force it to not consider
it to be constant, and leaves the more efficient normal case
in place for modern compilers, using an #ifdef to annotate
why we do this hack.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Checking for timer expiration is done from the softirq TIMER_SOFTIRQ.
Since commit 4cd13c21b2 ("softirq: Let ksoftirqd do its job"),
pending softirqs are no longer always handled immediately, instead,
if there are pending softirqs, and ksoftirqd is in state TASK_RUNNING,
the handling of the softirqs are deferred, and are instead supposed
to be handled by ksoftirqd, when ksoftirqd gets scheduled.
If a user space process with a real-time policy starts to misbehave
by never relinquishing the CPU while ksoftirqd is in state TASK_RUNNING,
what will happen is that all softirqs will get deferred, while ksoftirqd,
which is supposed to handle the deferred softirqs, will never get to run.
To make sure that the watchdog is able to fire even when we do not get
to run softirqs, replace the timers with hrtimers.
Signed-off-by: Niklas Cassel <niklas.cassel@axis.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
The kempld watchdog driver requires the respective MFD driver:
drivers/watchdog/built-in.o: In function `kempld_wdt_probe':
kempld_wdt.c:(.text+0x5c78): undefined reference to `kempld_get_mutex'
kempld_wdt.c:(.text+0x5c84): undefined reference to `kempld_read8'
kempld_wdt.c:(.text+0x5c8e): undefined reference to `kempld_release_mutex'
kempld_wdt.c:(.text+0x5d1c): undefined reference to `kempld_read8'
kempld_wdt.c:(.text+0x5d2c): undefined reference to `kempld_write8'
This adds the Kconfig dependency back.
Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Without CONFIG_OF, the driver fails to link:
drivers/watchdog/built-in.o: In function `bcm2835_power_off':
bcm2835_wdt.c:(.text+0x1946): undefined reference to `of_find_device_by_node'
This adds a new dependency, to allow the COMPILE_TEST check to succeed.
Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
The driver fails to link if ARM_AMBA is disabled:
drivers/watchdog/sp805_wdt.o: In function `sp805_wdt_driver_init':
sp805_wdt.c:(.init.text+0x4): undefined reference to `amba_driver_register'
It seems that the COMPILE_TEST was added in the wrong place, as there
is no architecture dependency, but a bus dependency. This moves
the dependency accordingly.
Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
This driver fails to link when CONFIG_I2C is disabled or a loadable module while
the watchdog is built-in:
drivers/watchdog/built-in.o: In function `menf21bmc_wdt_shutdown':
menf21bmc_wdt.c:(.text+0x9b44): undefined reference to `i2c_smbus_write_word_data'
menf21bmc_wdt.c:(.text+0x9b44): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `i2c_smbus_write_word_data'
This adds a Kconfig dependency for it, to enforce a valid configuration.
Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Wtihout CONFIG_CS5535_MFGPT, the driver does not link right:
drivers/watchdog/built-in.o: In function `geodewdt_probe':
geodewdt.c:(.init.text+0xca3): undefined reference to `cs5535_mfgpt_alloc_timer'
geodewdt.c:(.init.text+0xcd4): undefined reference to `cs5535_mfgpt_write'
geodewdt.c:(.init.text+0xcef): undefined reference to `cs5535_mfgpt_toggle_event'
This adds back the dependency on this base driver.
Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
The wm831x watchdog driver can now be built without the wm831x mfd
driver, which results in a link error:
(.text+0x1a95c): undefined reference to `wm831x_set_bits'
(.text+0x1a95c): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_set_bits'
(.text+0x1a968): undefined reference to `wm831x_reg_lock'
(.text+0x1a968): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_reg_lock'
(.text+0x1a9dc): undefined reference to `wm831x_reg_unlock'
(.text+0x1a9dc): relocation truncated to fit: R_AARCH64_CALL26 against undefined symbol `wm831x_reg_unlock'
This adds back the dependency that was removed. We can still build test
this driver on all architectures by enabling the MFD driver for it first.
Fixes: da2a68b3eb ("watchdog: Enable COMPILE_TEST where possible")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Linus reported the following commit broke module loading on his laptop:
d1091c7fa3 ("objtool: Improve detection of BUG() and other dead ends")
It showed errors like the following:
module: overflow in relocation type 10 val ffffffffc02afc81
module: 'nvme' likely not compiled with -mcmodel=kernel
The problem is that the __unreachable section addresses are stored using
the '.long' asm directive, which isn't big enough for .text section
kernel addresses. Use relative addresses instead:
".long %c0b - .\t\n"
Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: d1091c7fa3 ("objtool: Improve detection of BUG() and other dead ends")
Link: http://lkml.kernel.org/r/20170301060504.oltm3iws6fmubnom@treble
Signed-off-by: Ingo Molnar <mingo@kernel.org>
pmc_reprogram_counter() always sets a sample period based on the value of
pmc->counter. However, hsw_hw_config() rejects sample periods less than
2^31 - 1. So for example, if a KVM guest does
struct perf_event_attr attr;
memset(&attr, 0, sizeof(attr));
attr.type = PERF_TYPE_RAW;
attr.size = sizeof(attr);
attr.config = 0x2005101c4; // conditional branches retired IN_TXCP
attr.sample_period = 0;
int fd = syscall(__NR_perf_event_open, &attr, 0, -1, -1, 0);
ioctl(fd, PERF_EVENT_IOC_DISABLE, 0);
ioctl(fd, PERF_EVENT_IOC_ENABLE, 0);
the guest kernel counts some conditional branch events, then updates the
virtual PMU register with a nonzero count. The host reaches
pmc_reprogram_counter() with nonzero pmc->counter, triggers EOPNOTSUPP
in hsw_hw_config(), prints "kvm_pmu: event creation failed" in
pmc_reprogram_counter(), and silently (from the guest's point of view) stops
counting events.
We fix event counting by forcing attr.sample_period to always be zero for
in_tx_cp counters. Sampling doesn't work, but it already didn't work and
can't be fixed without major changes to the approach in hsw_hw_config().
Signed-off-by: Robert O'Callahan <robert@ocallahan.org>
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Running with KASAN and crypto tests currently gives
BUG: KASAN: global-out-of-bounds in __test_aead+0x9d9/0x2200 at addr ffffffff8212fca0
Read of size 16 by task cryptomgr_test/1107
Address belongs to variable 0xffffffff8212fca0
CPU: 0 PID: 1107 Comm: cryptomgr_test Not tainted 4.10.0+ #45
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.9.1-1.fc24 04/01/2014
Call Trace:
dump_stack+0x63/0x8a
kasan_report.part.1+0x4a7/0x4e0
? __test_aead+0x9d9/0x2200
? crypto_ccm_init_crypt+0x218/0x3c0 [ccm]
kasan_report+0x20/0x30
check_memory_region+0x13c/0x1a0
memcpy+0x23/0x50
__test_aead+0x9d9/0x2200
? kasan_unpoison_shadow+0x35/0x50
? alg_test_akcipher+0xf0/0xf0
? crypto_skcipher_init_tfm+0x2e3/0x310
? crypto_spawn_tfm2+0x37/0x60
? crypto_ccm_init_tfm+0xa9/0xd0 [ccm]
? crypto_aead_init_tfm+0x7b/0x90
? crypto_alloc_tfm+0xc4/0x190
test_aead+0x28/0xc0
alg_test_aead+0x54/0xd0
alg_test+0x1eb/0x3d0
? alg_find_test+0x90/0x90
? __sched_text_start+0x8/0x8
? __wake_up_common+0x70/0xb0
cryptomgr_test+0x4d/0x60
kthread+0x173/0x1c0
? crypto_acomp_scomp_free_ctx+0x60/0x60
? kthread_create_on_node+0xa0/0xa0
ret_from_fork+0x2c/0x40
Memory state around the buggy address:
ffffffff8212fb80: 00 00 00 00 01 fa fa fa fa fa fa fa 00 00 00 00
ffffffff8212fc00: 00 01 fa fa fa fa fa fa 00 00 00 00 01 fa fa fa
>ffffffff8212fc80: fa fa fa fa 00 05 fa fa fa fa fa fa 00 00 00 00
^
ffffffff8212fd00: 01 fa fa fa fa fa fa fa 00 00 00 00 01 fa fa fa
ffffffff8212fd80: fa fa fa fa 00 00 00 00 00 05 fa fa fa fa fa fa
This always happens on the same IV which is less than 16 bytes.
Per Ard,
"CCM IVs are 16 bytes, but due to the way they are constructed
internally, the final couple of bytes of input IV are dont-cares.
Apparently, we do read all 16 bytes, which triggers the KASAN errors."
Fix this by padding the IV with null bytes to be at least 16 bytes.
Cc: stable@vger.kernel.org
Fixes: 0bc5a6c5c7 ("crypto: testmgr - Disable rfc4309 test and convert
test vectors")
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Laura Abbott <labbott@redhat.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The accelerated CRC32 module for ARM may use either the scalar CRC32
instructions, the NEON 64x64 to 128 bit polynomial multiplication
(vmull.p64) instruction, or both, depending on what the current CPU
supports.
However, this also requires support in binutils, and as it turns out,
versions of binutils exist that support the vmull.p64 instruction but
not the crc32 instructions.
So refactor the Makefile logic so that this module only gets built if
binutils has support for both.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Jon Hunter <jonathanh@nvidia.com>
Tested-by: Jon Hunter <jonathanh@nvidia.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Annotate a vmov instruction with an explicit element size of 32 bits.
This is inferred by recent toolchains, but apparently, older versions
need some help figuring this out.
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
The interleave-set cookie is a sum that sanity checks the composition of
an interleave set has not changed from when the namespace was initially
created. The checksum is calculated by sorting the DIMMs by their
location in the interleave-set. The comparison for the sort must be
64-bit wide, not byte-by-byte as performed by memcmp() in the broken
case.
Fix the implementation to accept correct cookie values in addition to
the Linux "memcmp" order cookies, but only allow correct cookies to be
generated going forward. It does mean that namespaces created by
third-party-tooling, or created by newer kernels with this fix, will not
validate on older kernels. However, there are a couple mitigating
conditions:
1/ platforms with namespace-label capable NVDIMMs are not widely
available.
2/ interleave-sets with a single-dimm are by definition not affected
(nothing to sort). This covers the QEMU-KVM NVDIMM emulation case.
The cookie stored in the namespace label will be fixed by any write the
namespace label, the most straightforward way to achieve this is to
write to the "alt_name" attribute of a namespace in sysfs.
Cc: <stable@vger.kernel.org>
Fixes: eaf961536e ("libnvdimm, nfit: add interleave-set state-tracking infrastructure")
Reported-by: Nicholas Moulin <nicholas.w.moulin@linux.intel.com>
Tested-by: Nicholas Moulin <nicholas.w.moulin@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The fsl-mc-bus driver in staging contains a copy of the standard
'ranges' property parsing algorithm with a hack to treat a missing
property the same way as an empty one. This code produces false-positive
warnings for me in an allmodconfig build:
drivers/staging/fsl-mc/bus/fsl-mc-bus.c: In function 'fsl_mc_bus_probe':
drivers/staging/fsl-mc/bus/fsl-mc-bus.c:645:6: error: 'mc_size_cells' may be used uninitialized in this function [-Werror=maybe-uninitialized]
drivers/staging/fsl-mc/bus/fsl-mc-bus.c:682:8: error: 'mc_addr_cells' may be used uninitialized in this function [-Werror=maybe-uninitialized]
drivers/staging/fsl-mc/bus/fsl-mc-bus.c:644:6: note: 'mc_addr_cells' was declared here
drivers/staging/fsl-mc/bus/fsl-mc-bus.c:684:8: error: 'paddr_cells' may be used uninitialized in this function [-Werror=maybe-uninitialized]
drivers/staging/fsl-mc/bus/fsl-mc-bus.c:643:6: note: 'paddr_cells' was declared here
To avoid the warnings, I'm simplifying the argument handling to pass
the number of valid ranges in the property as the function return code
rather than passing it by reference. With this change, gcc can see that
we don't evaluate the cell numbers for an missing ranges property.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Laurentiu Tudor <laurentiu.tudor@nxp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Due to personal reasons I'm unable to continue as fbtft maintainer.
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
For testing changes to the iset cookie algorithm we need a value that is
constant from run-to-run.
Stop including dynamic data in the emulated region_offset values. Also,
pick values that sort in a different order depending on whether the
comparison is a memcmp() of two 8-byte arrays or subtraction of two
64-bit values.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
The turbostat before this last set of changes is obsolete.
This new version can do a lot more, but it also has
some different defaults, that might catch some off-guard.
So it seems a good time to give a new version number.
Signed-off-by: Len Brown <len.brown@intel.com>
When the "u32" keyword is used with --add, it means that
the output should be truncated to 32-bits. This was not
happening and all 64-bits were printed.
Also, when no column name was used for an added MSR,
The default column name was in deximal, eg. MSR16.
Users report that they tend to use hex MSR numbers,
so print them in hex. To always fit into the columns,
use the syntax M0x10. Note that the user can always
supply any column header that they want.
eg --add msr0x10,MY_TSC
Signed-off-by: Len Brown <len.brown@intel.com>
When turbostat is run in one-shot command mode,
the parent takes the 'before' counter snapshot,
fork/exec/wait for the child to exit,
takes the 'after' counter snapshot,
and prints the results.
however, if the child fails to exec the command,
it immediately returns, without indicating that
anythign was wrong.
Add an error message showing that exec failed:
sudo turbostat sleeeep 4
...
turbostat: exec sleeeep: No such file or directory
...
Note that the parent will still print out the statistics,
because it can't tell the difference between the failed
exec and a command that is purposefully returning
the same status. Unfortunately, this may obscure the
error message. However, if the --out parameter is used,
the error message is evident on stderr.
Reported-by: Wendy Wang <wendy.wang@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
