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These registers are not actually writable by the CPU; only the GuC can
actually program them. So let's not do writes that have no effect.
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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Bitmap operators are overkill when touching only one bit.
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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To properly verify the driver->doorbell->GuC functionality, validation
needs to know how the driver has assigned the doorbell cache lines and
registers, so make them visible through debugfs.
v2: use kernel bitmap-printing format (%pb) rather than %x.
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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Unlike the debug_fault_info table, we never intentionally alter the
fault_info table at runtime, and all derived pointers are treated as
const currently.
Make the table const so that it can be placed in .rodata and protected
from unintentional writes, as we do for the syscall tables.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
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If the kernel is set to show unhandled signals, and a user task does not
handle a SIGILL as a result of an instruction abort, we will attempt to
log the offending instruction with dump_instr before killing the task.
We use dump_instr to log the encoding of the offending userspace
instruction. However, dump_instr is also used to dump instructions from
kernel space, and internally always switches to KERNEL_DS before dumping
the instruction with get_user. When both PAN and UAO are in use, reading
a user instruction via get_user while in KERNEL_DS will result in a
permission fault, which leads to an Oops.
As we have regs corresponding to the context of the original instruction
abort, we can inspect this and only flip to KERNEL_DS if the original
abort was taken from the kernel, avoiding this issue. At the same time,
remove the redundant (and incorrect) comments regarding the order
dump_mem and dump_instr are called in.
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Robin Murphy <robin.murphy@arm.com>
Cc: <stable@vger.kernel.org> #4.6+
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Reported-by: Vladimir Murzin <vladimir.murzin@arm.com>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com>
Fixes: 57f4959bad0a154a ("arm64: kernel: Add support for User Access Override")
Signed-off-by: Will Deacon <will.deacon@arm.com>
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processing sysrq-w
Lengthy output of sysrq-w may take a lot of time on slow serial console.
Currently we reset NMI-watchdog on the current CPU to avoid spurious
lockup messages. Sometimes this doesn't work since softlockup watchdog
might trigger on another CPU which is waiting for an IPI to proceed.
We reset softlockup watchdogs on all CPUs, but we do this only after
listing all tasks, and this may be too late on a busy system.
So, reset watchdogs CPUs earlier, in for_each_process_thread() loop.
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: <stable@vger.kernel.org>
Link: http://lkml.kernel.org/r/1465474805-14641-1-git-send-email-aryabinin@virtuozzo.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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I see a hang when enabling sched events:
echo 1 > /sys/kernel/debug/tracing/events/sched/enable
The printk buffer shows:
BUG: spinlock recursion on CPU#1, swapper/1/0
lock: 0xffff88007d5d8c00, .magic: dead4ead, .owner: swapper/1/0, .owner_cpu: 1
CPU: 1 PID: 0 Comm: swapper/1 Not tainted 4.7.0-rc2+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.8.1-20150318_183358- 04/01/2014
...
Call Trace:
<IRQ> [<ffffffff8143d663>] dump_stack+0x85/0xc2
[<ffffffff81115948>] spin_dump+0x78/0xc0
[<ffffffff81115aea>] do_raw_spin_lock+0x11a/0x150
[<ffffffff81891471>] _raw_spin_lock+0x61/0x80
[<ffffffff810e5466>] ? try_to_wake_up+0x256/0x4e0
[<ffffffff810e5466>] try_to_wake_up+0x256/0x4e0
[<ffffffff81891a0a>] ? _raw_spin_unlock_irqrestore+0x4a/0x80
[<ffffffff810e5705>] wake_up_process+0x15/0x20
[<ffffffff810cebb4>] insert_work+0x84/0xc0
[<ffffffff810ced7f>] __queue_work+0x18f/0x660
[<ffffffff810cf9a6>] queue_work_on+0x46/0x90
[<ffffffffa00cd95b>] drm_fb_helper_dirty.isra.11+0xcb/0xe0 [drm_kms_helper]
[<ffffffffa00cdac0>] drm_fb_helper_sys_imageblit+0x30/0x40 [drm_kms_helper]
[<ffffffff814babcd>] soft_cursor+0x1ad/0x230
[<ffffffff814ba379>] bit_cursor+0x649/0x680
[<ffffffff814b9d30>] ? update_attr.isra.2+0x90/0x90
[<ffffffff814b5e6a>] fbcon_cursor+0x14a/0x1c0
[<ffffffff81555ef8>] hide_cursor+0x28/0x90
[<ffffffff81558b6f>] vt_console_print+0x3bf/0x3f0
[<ffffffff81122c63>] call_console_drivers.constprop.24+0x183/0x200
[<ffffffff811241f4>] console_unlock+0x3d4/0x610
[<ffffffff811247f5>] vprintk_emit+0x3c5/0x610
[<ffffffff81124bc9>] vprintk_default+0x29/0x40
[<ffffffff811e965b>] printk+0x57/0x73
[<ffffffff810f7a9e>] enqueue_entity+0xc2e/0xc70
[<ffffffff810f7b39>] enqueue_task_fair+0x59/0xab0
[<ffffffff8106dcd9>] ? kvm_sched_clock_read+0x9/0x20
[<ffffffff8103fb39>] ? sched_clock+0x9/0x10
[<ffffffff810e3fcc>] activate_task+0x5c/0xa0
[<ffffffff810e4514>] ttwu_do_activate+0x54/0xb0
[<ffffffff810e5cea>] sched_ttwu_pending+0x7a/0xb0
[<ffffffff810e5e51>] scheduler_ipi+0x61/0x170
[<ffffffff81059e7f>] smp_trace_reschedule_interrupt+0x4f/0x2a0
[<ffffffff81893ba6>] trace_reschedule_interrupt+0x96/0xa0
<EOI> [<ffffffff8106e0d6>] ? native_safe_halt+0x6/0x10
[<ffffffff8110fb1d>] ? trace_hardirqs_on+0xd/0x10
[<ffffffff81040ac0>] default_idle+0x20/0x1a0
[<ffffffff8104147f>] arch_cpu_idle+0xf/0x20
[<ffffffff81102f8f>] default_idle_call+0x2f/0x50
[<ffffffff8110332e>] cpu_startup_entry+0x37e/0x450
[<ffffffff8105af70>] start_secondary+0x160/0x1a0
Note the hang only occurs when echoing the above from a physical serial
console, not from an ssh session.
The bug is caused by a deadlock where the task is trying to grab the rq
lock twice because printk()'s aren't safe in sched code.
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: stable@vger.kernel.org
Fixes: cb2517653fcc ("sched/debug: Make schedstats a runtime tunable that is disabled by default")
Link: http://lkml.kernel.org/r/20160613073209.gdvdybiruljbkn3p@treble
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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Fix kprobe_fault_handler() to clear the TF (trap flag) bit of
the flags register in the case of a fault fixup on single-stepping.
If we put a kprobe on the instruction which caused a
page fault (e.g. actual mov instructions in copy_user_*),
that fault happens on the single-stepping buffer. In this
case, kprobes resets running instance so that the CPU can
retry execution on the original ip address.
However, current code forgets to reset the TF bit. Since this
fault happens with TF bit set for enabling single-stepping,
when it retries, it causes a debug exception and kprobes
can not handle it because it already reset itself.
On the most of x86-64 platform, it can be easily reproduced
by using kprobe tracer. E.g.
# cd /sys/kernel/debug/tracing
# echo p copy_user_enhanced_fast_string+5 > kprobe_events
# echo 1 > events/kprobes/enable
And you'll see a kernel panic on do_debug(), since the debug
trap is not handled by kprobes.
To fix this problem, we just need to clear the TF bit when
resetting running kprobe.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Vince Weaver <vincent.weaver@maine.edu>
Cc: systemtap@sourceware.org
Cc: stable@vger.kernel.org # All the way back to ancient kernels
Link: http://lkml.kernel.org/r/20160611140648.25885.37482.stgit@devbox
[ Updated the comments. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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This is a WA affecting pooled eu which is a bxt specific feature.
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Winiarski, Michal <michal.winiarski@intel.com>
Cc: Zou, Nanhai <nanhai.zou@intel.com>
Cc: Yang, Rong R <rong.r.yang@intel.com>
Cc: Jeff McGee <jeff.mcgee@intel.com>
Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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Pooled EU is enabled by default for BXT but for fused down 2x6 parts it is
advised to turn it off. But there is another HW issue in these parts (fused
down 2x6 parts) before C0 that requires Pooled EU to be enabled as a
workaround. In this case the pool configuration changes depending upon
which subslice is disabled. This doesn't affect if the device has all 3
subslices enabled.
Userspace need to know min no. of eus in a pool as it varies based on which
subslice is disabled, this is not yet exported because userspace support is
not available yet. Once the support is available this needs to be exported
using getparam ioctls.
v2: s/subslice_total/subslice_per_slice as it is a more logical field (Mika)
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Winiarski, Michal <michal.winiarski@intel.com>
Cc: Zou, Nanhai <nanhai.zou@intel.com>
Cc: Yang, Rong R <rong.r.yang@intel.com>
Cc: Tim Gore <tim.gore@intel.com>
Cc: Jeff McGee <jeff.mcgee@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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This mode allows to assign EUs to pools which can process work collectively.
The command to enable this mode should be issued as part of context initialization.
The pooled mode is global, once enabled it has to stay the same across all
contexts until HW reset hence this is sent in auxiliary golden context batch.
Thanks to Mika for the preliminary review and comments.
v2: explain why this is enabled in golden context, use feature flag while
enabling the support (Chris)
v3: Include only kernel support as userspace support is not available yet.
User space clients need to know when the pooled EU feature is present
and enabled on the hardware so that they can adapt work submissions.
Create a new device info flag for this purpose.
Set has_pooled_eu to true in the Broxton static device info - Broxton
supports the feature in hardware and the driver will enable it by
default.
We need to add getparam ioctls to enable userspace to query availability of
this feature and to retrieve min. no of eus in a pool but we will expose
them once userspace support is available. Opensource users for this feature
are mesa, libva and beignet.
Beignet team is currently working on adding userspace support.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk> (v2)
Cc: Winiarski, Michal <michal.winiarski@intel.com>
Cc: Zou, Nanhai <nanhai.zou@intel.com>
Cc: Yang, Rong R <rong.r.yang@intel.com>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Armin Reese <armin.c.reese@intel.com>
Cc: Tim Gore <tim.gore@intel.com>
Signed-off-by: Jeff McGee <jeff.mcgee@intel.com>
Signed-off-by: Arun Siluvery <arun.siluvery@linux.intel.com>
Reviewed-by: Michał Winiarski <michal.winiarski@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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When allocating a new device IRQ, gic_dev_domain_alloc() correctly calls
irq_domain_set_hwirq_and_chip(), but gic_irq_domain_alloc() does not. This
means that gic_irq_domain believes all IRQs from the dev domain have an
hwirq of 0 and creates incorrect mappings in the linear_revmap. As
gic_irq_domain is a parent of the gic_dev_domain, this leads to an
inability to boot on devices with a GIC. Excerpt of the error:
[ 2.297649] irq 0: nobody cared (try booting with the "irqpoll" option)
...
[ 2.436963] handlers:
[ 2.439492] Disabling IRQ #0
Fix this by calling irq_domain_set_hwirq_and_chip() for both the dev and
irq domain.
Now that we are modifying the parent domain, be sure to clear it up in
case of an allocation error.
Fixes: c98c1822ee13 ("irqchip/mips-gic: Add device hierarchy domain")
Fixes: 2af70a962070 ("irqchip/mips-gic: Add a IPI hierarchy domain")
Signed-off-by: Harvey Hunt <harvey.hunt@imgtec.com>
Tested-by: Govindraj Raja <Govindraj.Raja@imgtec.com> # On Pistachio SoC
Reviewed-by: Matt Redfearn <matt.redfearn@imgtec.com>
Cc: linux-mips@linux-mips.org
Cc: Qais Yousef <qsyousef@gmail.com>
Cc: jason@lakedaemon.net
Cc: marc.zyngier@arm.com
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1464001552-31174-1-git-send-email-harvey.hunt@imgtec.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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Merge MIPS patches destined to both 4.7 and kvm/next, to avoid
unnecessary conflicts.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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When emulating TLB miss / invalid exceptions during CACHE instruction
emulation, be sure to set up the correct PC and host_cp0_badvaddr state
for the kvm_mips_emlulate_tlb*_ld() function to pick up for guest EPC
and BadVAddr.
PC needs to be rewound otherwise the guest EPC will end up pointing at
the next instruction after the faulting CACHE instruction.
host_cp0_badvaddr must be set because guest CACHE instructions trap with
a Coprocessor Unusable exception, which doesn't update the host BadVAddr
as a TLB exception would.
This doesn't tend to get hit when dynamic translation of emulated
instructions is enabled, since only the first execution of each CACHE
instruction actually goes through this code path, with subsequent
executions hitting the SYNCI instruction that it gets replaced with.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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When a CACHE instruction is emulated by kvm_mips_emulate_cache(), the PC
is first updated to point to the next instruction, and afterwards it
falls through the "dont_update_pc" label, which rewinds the PC back to
its original address.
This works when dynamic translation of emulated instructions is enabled,
since the CACHE instruction is replaced with a SYNCI which works without
trapping, however when dynamic translation is disabled the guest hangs
on CACHE instructions as they always trap and are never stepped over.
Roughly swap the meanings of the "done" and "dont_update_pc" to match
kvm_mips_emulate_CP0(), so that "done" will roll back the PC on failure,
and "dont_update_pc" won't change PC at all (for the sake of exceptions
that have already modified the PC).
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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When faulting guest addresses are matched against guest segments with
the KVM_GUEST_KSEGX() macro, change the mask to 0xe0000000 so as to
include bit 31.
This is mainly for safety's sake, as it prevents a rogue BadVAddr in the
host kseg2/kseg3 segments (e.g. 0xC*******) after a TLB exception from
matching the guest kseg0 segment (e.g. 0x4*******), triggering an
internal KVM error instead of allowing the corresponding guest kseg0
page to be mapped into the host vmalloc space.
Such a rogue BadVAddr was observed to happen with the host MIPS kernel
running under QEMU with KVM built as a module, due to a not entirely
transparent optimisation in the QEMU TLB handling. This has already been
worked around properly in a previous commit.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Copy __kvm_mips_vcpu_run() into unmapped memory, so that we can never
get a TLB refill exception in it when KVM is built as a module.
This was observed to happen with the host MIPS kernel running under
QEMU, due to a not entirely transparent optimisation in the QEMU TLB
handling where TLB entries replaced with TLBWR are copied to a separate
part of the TLB array. Code in those pages continue to be executable,
but those mappings persist only until the next ASID switch, even if they
are marked global.
An ASID switch happens in __kvm_mips_vcpu_run() at exception level after
switching to the guest exception base. Subsequent TLB mapped kernel
instructions just prior to switching to the guest trigger a TLB refill
exception, which enters the guest exception handlers without updating
EPC. This appears as a guest triggered TLB refill on a host kernel
mapped (host KSeg2) address, which is not handled correctly as user
(guest) mode accesses to kernel (host) segments always generate address
error exceptions.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.10.x-
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Chris Wilson reported a divide by 0 at:
post_init_entity_util_avg():
> 725 if (cfs_rq->avg.util_avg != 0) {
> 726 sa->util_avg = cfs_rq->avg.util_avg * se->load.weight;
> -> 727 sa->util_avg /= (cfs_rq->avg.load_avg + 1);
> 728
> 729 if (sa->util_avg > cap)
> 730 sa->util_avg = cap;
> 731 } else {
Which given the lack of serialization, and the code generated from
update_cfs_rq_load_avg() is entirely possible:
if (atomic_long_read(&cfs_rq->removed_load_avg)) {
s64 r = atomic_long_xchg(&cfs_rq->removed_load_avg, 0);
sa->load_avg = max_t(long, sa->load_avg - r, 0);
sa->load_sum = max_t(s64, sa->load_sum - r * LOAD_AVG_MAX, 0);
removed_load = 1;
}
turns into:
ffffffff81087064: 49 8b 85 98 00 00 00 mov 0x98(%r13),%rax
ffffffff8108706b: 48 85 c0 test %rax,%rax
ffffffff8108706e: 74 40 je ffffffff810870b0
ffffffff81087070: 4c 89 f8 mov %r15,%rax
ffffffff81087073: 49 87 85 98 00 00 00 xchg %rax,0x98(%r13)
ffffffff8108707a: 49 29 45 70 sub %rax,0x70(%r13)
ffffffff8108707e: 4c 89 f9 mov %r15,%rcx
ffffffff81087081: bb 01 00 00 00 mov $0x1,%ebx
ffffffff81087086: 49 83 7d 70 00 cmpq $0x0,0x70(%r13)
ffffffff8108708b: 49 0f 49 4d 70 cmovns 0x70(%r13),%rcx
Which you'll note ends up with 'sa->load_avg - r' in memory at
ffffffff8108707a.
By calling post_init_entity_util_avg() under rq->lock we're sure to be
fully serialized against PELT updates and cannot observe intermediate
state like this.
Reported-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Yuyang Du <yuyang.du@intel.com>
Cc: bsegall@google.com
Cc: morten.rasmussen@arm.com
Cc: pjt@google.com
Cc: steve.muckle@linaro.org
Fixes: 2b8c41daba32 ("sched/fair: Initiate a new task's util avg to a bounded value")
Link: http://lkml.kernel.org/r/20160609130750.GQ30909@twins.programming.kicks-ass.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
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The PWM device exposed by the HLCDC IP is configured with an inverted
polarity by default. Registering the PWM chip with the normal polarity
was not a problem before commit 42e8992c58d4 ("pwm: Add core
infrastructure to allow atomic updates") because the ->set_polarity()
hook was called no matter the current polarity state, but this is no longer
the case.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
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Directly accessing inode fields bypasses ->getattr()
and can cause problems when the underlying filesystem
does not have the default ->getattr() implementation.
So instead of obtaining the backing inode via d_backing_inode()
use vfs_getattr() and obtain what we need from the kstat struct.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Reported-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
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This reverts commit 87f15d4add758fb7fc76655721af94be57a4c17d.
vfs_stat() can only be used on user supplied buffers.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
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This reverts commit 322ea0bbf3003df17b6253f76e572c37d79a6810.
vfs_stat() can only be used on user supplied buffers.
UBI's kapi.c is the API to the kernel and therefore vfs_stat()
is inappropriate.
This solves the problem that mounting any UBIFS will immediately
fail with -EINVAL.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
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Add the missing unlock before return from function i915_ppgtt_info()
in the error handling case.
Fixes: 1d2ac403ae3b(drm: Protect dev->filelist with its own mutex)
Signed-off-by: Wei Yongjun <yongjun_wei@trendmicro.com.cn>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465861320-26221-1-git-send-email-weiyj_lk@163.com
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git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu
Pull percpu fixes from Tejun Heo:
"While adding GFP_ATOMIC support to the percpu allocator, the
synchronization for the fast-path which doesn't require external
allocations was separated into pcpu_lock.
Unfortunately, it incorrectly decoupled async paths and percpu
chunks could get destroyed while still being operated on. This
contains two patches to fix the bug"
* 'for-4.7-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/percpu:
percpu: fix synchronization between synchronous map extension and chunk destruction
percpu: fix synchronization between chunk->map_extend_work and chunk destruction
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git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator
Pull regulator fixes from Mark Brown:
"Some driver specific fixes for the regulator subsystem:
- Some of the changes to the core that were merged in the last merge
window exposed the fact that the qcom-smd driver hadn't implemented
the voltage enumeration interfaces like it should. Since it's a
simple driver specific fix to implement them do that.
- Fix the ramp delay configuration for tps51632"
* tag 'regulator-fix-v4.7-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regulator:
regulator: qcom_smd: add list_voltage callback
regulator: qcom_smd: add regulator ops for pm8941 lnldo
regulator: qcom_smd: add list_voltage callback
regulator: tps51632: Fix setting ramp delay
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https://github.com/foss-for-synopsys-dwc-arc-processors/linux into drm-next
Add support for arcgpu on the sim platform.
* 'topic-arcpgu-sim' of https://github.com/foss-for-synopsys-dwc-arc-processors/linux:
ARC: [nsimosci] Enable ARC PGU on nSIM OSCI virtual platforms
ARCv2: [vdk] Enable ARC PGU on HS38 VDK
drm/arcpgu: Make ARC PGU usable on simulation platforms
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With commit e58e87adc8bf9 "powerpc/mm: Update _PAGE_KERNEL_RO" we now
use all the three PPP bits. The top bit is now used to have a PPP value
of 0b110 which will be mapped to kernel read only. When updating the
hpte entry use right mask such that we update the 63rd bit (top 'P' bit)
too.
Prior to e58e87adc8bf we didn't support KERNEL_RO at all (it was ==
KERNEL_RW), so this isn't a regression as such.
Fixes: e58e87adc8bf ("powerpc/mm: Update _PAGE_KERNEL_RO")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
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Acquire a reference to the carrier's kernel module in bus code, so
it can't be removed from the kernel while it still has a bus and thus
possibly devices attached to it.
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reported-by: Andreas Werner <andreas.werner@men.de>
Tested-by: Andreas Werner <andreas.werner@men.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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mcb_probe() does not aqcuire a reference to the probed device but drops one
when removing the device. As it is actually using the device, it should grab
a reference via get_device().
This could lead to a panic found with a rmmod/modprobe stress test
Signed-off-by: Johannes Thumshirn <jthumshirn@suse.de>
Reported-by: Andreas Werner <andreas.werner@men.de>
Tested-by: Andreas Werner <andreas.werner@men.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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This reverts commit 2ba272d7bde27e1db2cf1c6cee49b01b7ea08989.
The issue fixed by this patch is specific to compute rings and the
previous patch was enough. Additionally, this patch as been traced
to strange behavior on some CZ systems so we might as well drop it.
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git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into fixes
Fixes for Exynos-based Snow and Peach Pit boards for regressions introduced in
4.7-rc1 because OF graph logic expects specific names of child nodes.
* tag 'samsung-fixes-4.7-2' of git://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux:
ARM: dts: exynos: Fix port nodes names for Exynos5420 Peach Pit board
ARM: dts: exynos: Fix port nodes names for Exynos5250 Snow board
Signed-off-by: Olof Johansson <olof@lixom.net>
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I would like to help reviewing FSL/NXP ARM architecture patches.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Olof Johansson <olof@lixom.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux into fixes
SoCFPGA fix for v4.7
- Add missing PHY phandle for SoCFPGA VINING board
* tag 'socfpga_fix_for_v4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux:
ARM: dts: socfpga: Add missing PHY phandle
Signed-off-by: Olof Johansson <olof@lixom.net>
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Wrong operator.
Reported-by: David Binderman <linuxdev.baldrick@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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When executing in a PCI passthrough based virtuzliation environment, the
hypervisor will usually attempt to send a PCIe bus reset signal to the
ASIC when the VM reboots. In this scenario, the card is not correctly
initialized, but we still consider it to be posted. Therefore, in a
passthrough based environemnt we should always post the card to guarantee
it is in a good state for driver initialization.
Ported from amdgpu commit:
amdgpu: fix asic initialization for virtualized environments
Cc: Andres Rodriguez <andres.rodriguez@amd.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
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When executing in a PCI passthrough based virtuzliation environemnt, the
hypervisor will usually attempt to send a PCIe bus reset signal to the
ASIC when the VM reboots. In this scenario, the card is not correctly
initialized, but we still consider it to be posted. Therefore, in a
passthrough based environemnt we should always post the card to guarantee
it is in a good state for driver initialization.
However, if we are operating in SR-IOV mode it is up to the GIM driver
to manage the asic state, therefore we should not post the card (and
shouldn't be able to do it either).
v2: add missing semi-colon
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Andres Rodriguez <andres.rodriguez@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Replace the legacy drm_vblank_{on,off}() with the new helper functions.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Acked-by: Patrik Jakobsson <patrik.r.jakobsson@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465308482-15104-7-git-send-email-gustavo@padovan.org
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We don't need to use &radeon_crtc->base there as crtc is available
in the function.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465308482-15104-10-git-send-email-gustavo@padovan.org
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We don't need to use &amdgpu_crtc->base there as crtc is available
in the function.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465308482-15104-9-git-send-email-gustavo@padovan.org
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Replace the legacy drm_vblank_{on,off}() with the new helper functions.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465308482-15104-8-git-send-email-gustavo@padovan.org
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Replace the legacy drm_vblank_{on,off}() with the new helper functions.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465308482-15104-6-git-send-email-gustavo@padovan.org
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As they are not used anywhere outside drm_irq.c make them static.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465308482-15104-4-git-send-email-gustavo@padovan.org
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We don't have any user of this function anymore, let's remove it.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465308482-15104-3-git-send-email-gustavo@padovan.org
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We don't have any user of this function anymore, let's remove it.
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465308482-15104-2-git-send-email-gustavo@padovan.org
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Replace the legacy drm_send_vblank_event(), drm_arm_vblank_event() and
drm_vblank_{get,put}() with the new helper functions.
v2: add crtc to nouveau_page_flip_state (comment from Mario Kleiner)
Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1465308482-15104-1-git-send-email-gustavo@padovan.org
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Seems to cause problems for some older hardware. Kudos to Thom Kouwenhoven
for working a lot with the PLLs and figuring this out.
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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Seems r600/r700 does not like hard reset while freezing for hibernation
(regression due to 274ad65c9d02bdcbee9bae045517864c3521d530 which itself
is a fix for hibernation on some GPU families). Until i can debug further
issue with r600, let just disable this for r600/r700 as they are very
similar family and bug affecting one likely affect the other.
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Jérôme Glisse <jglisse@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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'regulator/fix/tps51632' into regulator-linus
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There are four non-static functions in i915_guc_submission.c that take a
'dev' parameter. All are called only from GuC loader code, and can be
easily converted to accept 'dev_priv' instead.
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1465579766-31595-1-git-send-email-david.s.gordon@intel.com
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Convert all static functions in i915_guc_submission.c that currently
take a 'dev' pointer to take 'dev_priv' instead (there are three,
guc_client_alloc(), guc_client_free(), and gem_allocate_guc_obj().
Signed-off-by: Dave Gordon <david.s.gordon@intel.com>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
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