Remove a WARN on an "AVIC IPI invalid target" exit, the WARN is trivial
to trigger from guest as it will fail on any destination APIC ID that
doesn't exist from the guest's perspective.
Don't bother recording anything in the kernel log, the common tracepoint
for kvm_avic_incomplete_ipi() is sufficient for debugging.
This reverts commit 37ef0c4414.
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20220204214205.3306634-2-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Currently, call_rcu_tasks_generic() sets ->percpu_enqueue_shift to
order_base_2(nr_cpu_ids) upon encountering sufficient contention.
This does not shift to use of non-CPU-0 callback queues as intended, but
rather continues using only CPU 0's queue. Although this does provide
some decrease in contention due to spreading work over multiple locks,
it is not the dramatic decrease that was intended.
This commit therefore makes call_rcu_tasks_generic() set
->percpu_enqueue_shift to 0.
Reported-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
The ilog2() function can be used to generate a shift count, but it will
generate the same count for a power of two as for one greater than a power
of two. This results in shift counts that are larger than necessary for
systems with a power-of-two number of CPUs because the CPUs are numbered
from zero, so that the maximum CPU number is one less than that power
of two.
This commit therefore substitutes order_base_2(), which appears to have
been designed for exactly this use case.
Suggested-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
The pattern "rdp->grpmask & rcu_rnp_online_cpus(rnp)" occurs frequently
in RCU code in order to determine whether rdp->cpu is online from an
RCU perspective. This commit therefore creates an rcu_rdp_cpu_online()
function to replace it.
[ paulmck: Apply kernel test robot unused-variable feedback. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit removes the cpus_read_lock() and cpus_read_unlock() calls
from rcu_barrier(), thus allowing CPUs to come and go during the course
of rcu_barrier() execution. Posting of the ->barrier_head callbacks does
synchronize with portions of RCU's CPU-hotplug notifiers, but these locks
are held for short time periods on both sides. Thus, full CPU-hotplug
operations could both start and finish during the execution of a given
rcu_barrier() invocation.
Additional synchronization is provided by a global ->barrier_lock.
Since the ->barrier_lock is only used during rcu_barrier() execution and
during onlining/offlining a CPU, the contention for this lock should
be low. It might be tempting to make use of a per-CPU lock just on
general principles, but straightforward attempts to do this have the
problems shown below.
Initial state: 3 CPUs present, CPU 0 and CPU1 do not have
any callback and CPU2 has callbacks.
1. CPU0 calls rcu_barrier().
2. CPU1 starts offlining for CPU2. CPU1 calls
rcutree_migrate_callbacks(). rcu_barrier_entrain() is called
from rcutree_migrate_callbacks(), with CPU2's rdp->barrier_lock.
It does not entrain ->barrier_head for CPU2, as rcu_barrier()
on CPU0 hasn't started the barrier sequence (by calling
rcu_seq_start(&rcu_state.barrier_sequence)) yet.
3. CPU0 starts new barrier sequence. It iterates over
CPU0 and CPU1, after acquiring their per-cpu ->barrier_lock
and finds 0 segcblist length. It updates ->barrier_seq_snap
for CPU0 and CPU1 and continues loop iteration to CPU2.
for_each_possible_cpu(cpu) {
raw_spin_lock_irqsave(&rdp->barrier_lock, flags);
if (!rcu_segcblist_n_cbs(&rdp->cblist)) {
WRITE_ONCE(rdp->barrier_seq_snap, gseq);
raw_spin_unlock_irqrestore(&rdp->barrier_lock, flags);
rcu_barrier_trace(TPS("NQ"), cpu, rcu_state.barrier_sequence);
continue;
}
4. rcutree_migrate_callbacks() completes execution on CPU1.
Segcblist len for CPU2 becomes 0.
5. The loop iteration on CPU0, checks rcu_segcblist_n_cbs(&rdp->cblist)
for CPU2 and completes the loop iteration after setting
->barrier_seq_snap.
6. As there isn't any ->barrier_head callback entrained; at
this point, rcu_barrier() in CPU0 returns.
7. The callbacks, which migrated from CPU2 to CPU1, execute.
Straightforward per-CPU locking is also subject to the following race
condition noted by Boqun Feng:
1. CPU0 calls rcu_barrier(), starting a new barrier sequence by invoking
rcu_seq_start() and init_completion(), but does not yet initialize
rcu_state.barrier_cpu_count.
2. CPU1 starts offlining for CPU2, calling rcutree_migrate_callbacks(),
which in turn calls rcu_barrier_entrain() holding CPU2's.
rdp->barrier_lock. It then entrains ->barrier_head for CPU2
and atomically increments rcu_state.barrier_cpu_count, which is
unfortunately not yet initialized to the value 2.
3. The just-entrained RCU callback is invoked. It atomically
decrements rcu_state.barrier_cpu_count and sees that it is
now zero. This callback therefore invokes complete().
4. CPU0 continues executing rcu_barrier(), but is not blocked
by its call to wait_for_completion(). This results in rcu_barrier()
returning before all pre-existing callbacks have been invoked,
which is a bug.
Therefore, synchronization is provided by rcu_state.barrier_lock,
which is also held across the initialization sequence, especially the
rcu_seq_start() and the atomic_set() that sets rcu_state.barrier_cpu_count
to the value 2. In addition, this lock is held when entraining the
rcu_barrier() callback, when deciding whether or not a CPU has callbacks
that rcu_barrier() must wait on, when setting the ->qsmaskinitnext for
incoming CPUs, and when migrating callbacks from a CPU that is going
offline.
Reviewed-by: Frederic Weisbecker <frederic@kernel.org>
Co-developed-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Neeraj Upadhyay <quic_neeraju@quicinc.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit reworks rcu_barrier() and callback-migration logic to
permit allowing rcu_barrier() to run concurrently with CPU-hotplug
operations. The key trick is for callback migration to check to see if
an rcu_barrier() is in flight, and, if so, enqueue the ->barrier_head
callback on its behalf.
This commit adds synchronization with RCU's CPU-hotplug notifiers. Taken
together, this will permit a later commit to remove the cpus_read_lock()
and cpus_read_unlock() calls from rcu_barrier().
[ paulmck: Updated per kbuild test robot feedback. ]
[ paulmck: Updated per reviews session with Neeraj, Frederic, Uladzislau, and Boqun. ]
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit saves a few lines by checking first for an empty callback
list. If the callback list is empty, then that CPU is taken care of,
regardless of its online or nocb state. Also simplify tracing accordingly
and fold a few lines together.
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
If we allow architectures to bring APs online in parallel, then we end
up requiring rcu_cpu_starting() to be reentrant. But currently, the
manipulation of rnp->ofl_seq is not thread-safe.
However, rnp->ofl_seq is also fairly much pointless anyway since both
rcu_cpu_starting() and rcu_report_dead() hold rcu_state.ofl_lock for
fairly much the whole time that rnp->ofl_seq is set to an odd number
to indicate that an operation is in progress.
So drop rnp->ofl_seq completely, and use only rcu_state.ofl_lock.
This has a couple of minor complexities: lockdep will complain when we
take rcu_state.ofl_lock, and currently accepts the 'excuse' of having
an odd value in rnp->ofl_seq. So switch it to an arch_spinlock_t to
avoid that false positive complaint. Since we're killing rnp->ofl_seq
of course that 'excuse' has to be changed too, so make it check for
arch_spin_is_locked(rcu_state.ofl_lock).
There's no arch_spin_lock_irqsave() so we have to manually save and
restore local interrupts around the locking.
At Paul's request based on Neeraj's analysis, make rcu_gp_init not just
wait but *exclude* any CPU online/offline activity, which was fairly
much true already by virtue of it holding rcu_state.ofl_lock.
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
* kvm-arm64/pmu-bl:
: .
: Improve PMU support on heterogeneous systems, courtesy of Alexandru Elisei
: .
KVM: arm64: Refuse to run VCPU if the PMU doesn't match the physical CPU
KVM: arm64: Add KVM_ARM_VCPU_PMU_V3_SET_PMU attribute
KVM: arm64: Keep a list of probed PMUs
KVM: arm64: Keep a per-VM pointer to the default PMU
perf: Fix wrong name in comment for struct perf_cpu_context
KVM: arm64: Do not change the PMU event filter after a VCPU has run
Signed-off-by: Marc Zyngier <maz@kernel.org>
Userspace can assign a PMU to a VCPU with the KVM_ARM_VCPU_PMU_V3_SET_PMU
device ioctl. If the VCPU is scheduled on a physical CPU which has a
different PMU, the perf events needed to emulate a guest PMU won't be
scheduled in and the guest performance counters will stop counting. Treat
it as an userspace error and refuse to run the VCPU in this situation.
Suggested-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220127161759.53553-7-alexandru.elisei@arm.com
When KVM creates an event and there are more than one PMUs present on the
system, perf_init_event() will go through the list of available PMUs and
will choose the first one that can create the event. The order of the PMUs
in this list depends on the probe order, which can change under various
circumstances, for example if the order of the PMU nodes change in the DTB
or if asynchronous driver probing is enabled on the kernel command line
(with the driver_async_probe=armv8-pmu option).
Another consequence of this approach is that on heteregeneous systems all
virtual machines that KVM creates will use the same PMU. This might cause
unexpected behaviour for userspace: when a VCPU is executing on the
physical CPU that uses this default PMU, PMU events in the guest work
correctly; but when the same VCPU executes on another CPU, PMU events in
the guest will suddenly stop counting.
Fortunately, perf core allows user to specify on which PMU to create an
event by using the perf_event_attr->type field, which is used by
perf_init_event() as an index in the radix tree of available PMUs.
Add the KVM_ARM_VCPU_PMU_V3_CTRL(KVM_ARM_VCPU_PMU_V3_SET_PMU) VCPU
attribute to allow userspace to specify the arm_pmu that KVM will use when
creating events for that VCPU. KVM will make no attempt to run the VCPU on
the physical CPUs that share the PMU, leaving it up to userspace to manage
the VCPU threads' affinity accordingly.
To ensure that KVM doesn't expose an asymmetric system to the guest, the
PMU set for one VCPU will be used by all other VCPUs. Once a VCPU has run,
the PMU cannot be changed in order to avoid changing the list of available
events for a VCPU, or to change the semantics of existing events.
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220127161759.53553-6-alexandru.elisei@arm.com
The ARM PMU driver calls kvm_host_pmu_init() after probing to tell KVM that
a hardware PMU is available for guest emulation. Heterogeneous systems can
have more than one PMU present, and the callback gets called multiple
times, once for each of them. Keep track of all the PMUs available to KVM,
as they're going to be needed later.
Reviewed-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220127161759.53553-5-alexandru.elisei@arm.com
As we are about to allow selection of the PMU exposed to a guest, start by
keeping track of the default one instead of only the PMU version.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Link: https://lore.kernel.org/r/20220127161759.53553-4-alexandru.elisei@arm.com
Commit 0793a61d4d ("performance counters: core code") added the perf
subsystem (then called Performance Counters) to Linux, creating the struct
perf_cpu_context. The comment for the struct referred to it as a "struct
perf_counter_cpu_context".
Commit cdd6c482c9 ("perf: Do the big rename: Performance Counters ->
Performance Events") changed the comment to refer to a "struct
perf_event_cpu_context", which was still the wrong name for the struct.
Change the comment to say "struct perf_cpu_context".
CC: Thomas Gleixner <tglx@linutronix.de>
CC: Ingo Molnar <mingo@redhat.com>
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220127161759.53553-3-alexandru.elisei@arm.com
Userspace can specify which events a guest is allowed to use with the
KVM_ARM_VCPU_PMU_V3_FILTER attribute. The list of allowed events can be
identified by a guest from reading the PMCEID{0,1}_EL0 registers.
Changing the PMU event filter after a VCPU has run can cause reads of the
registers performed before the filter is changed to return different values
than reads performed with the new event filter in place. The architecture
defines the two registers as read-only, and this behaviour contradicts
that.
Keep track when the first VCPU has run and deny changes to the PMU event
filter to prevent this from happening.
Signed-off-by: Marc Zyngier <maz@kernel.org>
[ Alexandru E: Added commit message, updated ioctl documentation ]
Signed-off-by: Alexandru Elisei <alexandru.elisei@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220127161759.53553-2-alexandru.elisei@arm.com
Commit 7707f7227f ("drm/rockchip: Add support for afbc") switched up
the rk3399_vop_big[] register windows, but it did so incorrectly.
The biggest problem is in rk3288_win23_data[] vs.
rk3368_win23_data[] .format field:
RK3288's format: VOP_REG(RK3288_WIN2_CTRL0, 0x7, 1)
RK3368's format: VOP_REG(RK3368_WIN2_CTRL0, 0x3, 5)
Bits 5:6 (i.e., shift 5, mask 0x3) are correct for RK3399, according to
the TRM.
There are a few other small differences between the 3288 and 3368
definitions that were swapped in commit 7707f7227f. I reviewed them to
the best of my ability according to the RK3399 TRM and fixed them up.
This fixes IOMMU issues (and display errors) when testing with BG24
color formats.
Fixes: 7707f7227f ("drm/rockchip: Add support for afbc")
Cc: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Brian Norris <briannorris@chromium.org>
Tested-by: Andrzej Pietrasiewicz <andrzej.p@collabora.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220119161104.1.I1d01436bef35165a8cdfe9308789c0badb5ff46a@changeid
The driver returns an error when devm_phy_optional_get() fails leaving
the previously enabled clock turned on. Change order and enable the
clock only after the phy has been acquired.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20220126145549.617165-3-s.hauer@pengutronix.de
Add DSCP support for the Intel Ethernet 800 Series devices. Setup VSI
DSCP info when PCI driver indicates DSCP mode during driver probe or as
notification event.
Link: https://lore.kernel.org/r/20220202191921.1638-4-shiraz.saleem@intel.com
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Rename dcb flag to dcb_vlan_mode in irdma_device struct. Add a new helper
function, irdma_set_qos_info, to set the VSI QoS information passed by the
PCI driver.
Link: https://lore.kernel.org/r/20220202191921.1638-3-shiraz.saleem@intel.com
Signed-off-by: Mustafa Ismail <mustafa.ismail@intel.com>
Signed-off-by: Shiraz Saleem <shiraz.saleem@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
All nodes and handles related to USB have the prefix usb or usb2,
whereas the phy handles are prefixed with u2phy. Rename for
consistency reasons and to facilitate sorting.
This patch also updates the handles in the only board file that
uses them (rk3566-quartz64-a.dts).
Signed-off-by: Michael Riesch <michael.riesch@wolfvision.net>
Link: https://lore.kernel.org/r/20220127190456.2195527-1-michael.riesch@wolfvision.net
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
This patch adds Devicetree for Bananapi R2 Pro based on RK3568.
Add uart/sd/emmc/i2c/rk809/tsadc nodes for basic function.
Gmac0 is directly connected to wan-port so usable without additional
driver.
On gmac1 there is a switch (rtl8367rb) connected which have not yet a
driver in mainline.
Patch also prepares nodes for GPIO header.
Co-developed-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Link: https://lore.kernel.org/r/20220123135116.136846-3-linux@fw-web.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Add Devicetree Binding for Bananapi R2 Pro Board based on rk3568 SoC
Co-developed-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Peter Geis <pgwipeout@gmail.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220123135116.136846-2-linux@fw-web.de
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
The Firefly RK3399 device tree had the GPU status set to disabled as per
the default from the rk3399.dtsi. This patch sets the status in the
firefly dts to enable it for use. Tested successfully on a 2GB Firefly
RK3399 board.
Signed-off-by: Michael Saunders <mick.saunders@gmail.com>
Link: https://lore.kernel.org/r/20220207073617.7386-1-mick.saunders@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Instead of manually setting snps,ref-clock-period-ns, we can let the
driver calculate it automatically from the "ref" clock. I haven't
reviewed this board's schematics, so please let me know if this is the
wrong 24MHz clock to use.
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Link: https://lore.kernel.org/r/20220127200636.1456175-8-sean.anderson@seco.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
These clocks are not used by the dwc3-xilinx driver except to
enable/disable them. Move them to the dwc3 node so its driver can use
them to configure the reference clock period.
Tested-by: Robert Hancock <robert.hancock@calian.com>
Reviewed-by: Robert Hancock <robert.hancock@calian.com>
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Link: https://lore.kernel.org/r/20220127200636.1456175-7-sean.anderson@seco.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
rtla osnoise and timerlat are causing a segmentation fault when running
with the --trace option on a kernel that does not support multiple
instances. For example:
[root@f34 rtla]# rtla osnoise top -t
failed to enable the tracer osnoise
Could not enable osnoiser tracer for tracing
Failed to enable the trace instance
Segmentation fault (core dumped)
This error happens because the exit code of the tools is trying
to destroy the trace instance that failed to be created.
Make osnoise_destroy_tool() aware of possible NULL osnoise_tool *,
and do not attempt to destroy it. This also simplifies the exit code.
Link: https://lkml.kernel.org/r/5660a2b6bf66c2655842360f2d7f6b48db5dba23.1644327249.git.bristot@kernel.org
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Fixes: 1eceb2fc2c ("rtla/osnoise: Add osnoise top mode")
Fixes: 829a6c0b56 ("rtla/osnoise: Add the hist mode")
Fixes: a828cd18bc ("rtla: Add timerlat tool and timelart top mode")
Fixes: 1eeb6328e8 ("rtla/timerlat: Add timerlat hist mode")
Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
In some cases, pages cannot be reused by i40e because the page is busy. Add
a counter for this event.
Busy page count is accessible via ethtool.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
In some cases, pages can not be reused because they are not associated with
the correct NUMA zone. Knowing how often pages are waived helps users to
understand the interaction between the driver's memory usage and their
system.
Pass rx_stats through to i40e_can_reuse_rx_page to allow tracking when
pages are waived.
The page waive count is accessible via ethtool.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Add a counter for new page allocations in the i40e RX path. This stat is
accessible with ethtool.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
rx page reuse was already being tracked by the i40e driver per RX ring.
Aggregate the counts and make them accessible via ethtool.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Page reuse was being tracked from two locations:
- i40e_reuse_rx_page (via 40e_clean_rx_irq), and
- i40e_alloc_mapped_page
Remove the double count and only count reuse from i40e_alloc_mapped_page
when the page is about to be reused.
Signed-off-by: Joe Damato <jdamato@fastly.com>
Tested-by: Dave Switzer <david.switzer@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
During event processing, events are read from the event queue one
by one until the queue is empty.If the master device continuously
requests address access at the same time and the SMMU generates
events, the cyclic processing of the event takes a long time and
softlockup warnings may be reported.
arm-smmu-v3 arm-smmu-v3.34.auto: event 0x0a received:
arm-smmu-v3 arm-smmu-v3.34.auto: 0x00007f220000280a
arm-smmu-v3 arm-smmu-v3.34.auto: 0x000010000000007e
arm-smmu-v3 arm-smmu-v3.34.auto: 0x00000000034e8670
watchdog: BUG: soft lockup - CPU#0 stuck for 22s! [irq/268-arm-smm:247]
Call trace:
_dev_info+0x7c/0xa0
arm_smmu_evtq_thread+0x1c0/0x230
irq_thread_fn+0x30/0x80
irq_thread+0x128/0x210
kthread+0x134/0x138
ret_from_fork+0x10/0x1c
Kernel panic - not syncing: softlockup: hung tasks
Fix this by calling cond_resched() after the event information is
printed.
Signed-off-by: Zhou Guanghui <zhouguanghui1@huawei.com>
Link: https://lore.kernel.org/r/20220119070754.26528-1-zhouguanghui1@huawei.com
Signed-off-by: Will Deacon <will@kernel.org>
If the probe fails, we should use pm_runtime_disable() to balance
pm_runtime_enable().
Add missing pm_runtime_disable() for error handling.
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Link: https://lore.kernel.org/r/20220105101619.29108-1-linmq006@gmail.com
Signed-off-by: Will Deacon <will@kernel.org>
kmalloc_array()/kcalloc() should be used to avoid potential overflow when
a multiplication is needed to compute the size of the requested memory.
So turn a devm_kzalloc()+explicit size computation into an equivalent
devm_kcalloc().
Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/3f7b9b202c6b6f5edc234ab7af5f208fbf8bc944.1644274051.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Will Deacon <will@kernel.org>
It's wrong to check the last packet by RXE_COMP_MASK because the flag is
to indicate if responder needs to generate a completion.
Fixes: 9fcd67d177 ("IB/rxe: increment msn only when completing a request")
Fixes: 8700e3e7c4 ("Soft RoCE driver")
Link: https://lore.kernel.org/r/20211229034438.1854908-1-yangx.jy@fujitsu.com
Signed-off-by: Xiao Yang <yangx.jy@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Currently the check functions are stubbed out at EL2. Implement
versions suitable for the constrained EL2 environment.
Signed-off-by: Keir Fraser <keirf@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220131124114.3103337-1-keirf@google.com
kvm_psci_version() consumes a pointer to struct kvm in addition to a
vcpu pointer. Drop the kvm pointer as it is unused. While the comment
suggests the explicit kvm pointer was useful for calling from hyp, there
exist no such callsite in hyp.
Signed-off-by: Oliver Upton <oupton@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220208012705.640444-1-oupton@google.com
* kvm-arm64/selftest/vgic-5.18:
: .
: A bunch of selftest fixes, courtesy of Ricardo Koller
: .
kvm: selftests: aarch64: use a tighter assert in vgic_poke_irq()
kvm: selftests: aarch64: fix some vgic related comments
kvm: selftests: aarch64: fix the failure check in kvm_set_gsi_routing_irqchip_check
kvm: selftests: aarch64: pass vgic_irq guest args as a pointer
kvm: selftests: aarch64: fix assert in gicv3_access_reg
Signed-off-by: Marc Zyngier <maz@kernel.org>
vgic_poke_irq() checks that the attr argument passed to the vgic device
ioctl is sane. Make this check tighter by moving it to after the last
attr update.
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reported-by: Reiji Watanabe <reijiw@google.com>
Cc: Andrew Jones <drjones@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220127030858.3269036-6-ricarkol@google.com
Fix the formatting of some comments and the wording of one of them (in
gicv3_access_reg).
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reported-by: Reiji Watanabe <reijiw@google.com>
Cc: Andrew Jones <drjones@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220127030858.3269036-5-ricarkol@google.com
kvm_set_gsi_routing_irqchip_check(expect_failure=true) is used to check
the error code returned by the kernel when trying to setup an invalid
gsi routing table. The ioctl fails if "pin >= KVM_IRQCHIP_NUM_PINS", so
kvm_set_gsi_routing_irqchip_check() should test the error only when
"intid >= KVM_IRQCHIP_NUM_PINS+32". The issue is that the test check is
"intid >= KVM_IRQCHIP_NUM_PINS", so for a case like "intid =
KVM_IRQCHIP_NUM_PINS" the test wrongly assumes that the kernel will
return an error. Fix this by using the right check.
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reported-by: Reiji Watanabe <reijiw@google.com>
Cc: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220127030858.3269036-4-ricarkol@google.com
The guest in vgic_irq gets its arguments in a struct. This struct used
to fit nicely in a single register so vcpu_args_set() was able to pass
it by value by setting x0 with it. Unfortunately, this args struct grew
after some commits and some guest args became random (specically
kvm_supports_irqfd).
Fix this by passing the guest args as a pointer (after allocating some
guest memory for it).
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reported-by: Reiji Watanabe <reijiw@google.com>
Cc: Andrew Jones <drjones@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220127030858.3269036-3-ricarkol@google.com
The val argument in gicv3_access_reg can have any value when used for a
read, not necessarily 0. Fix the assert by checking val only for
writes.
Signed-off-by: Ricardo Koller <ricarkol@google.com>
Reported-by: Reiji Watanabe <reijiw@google.com>
Cc: Andrew Jones <drjones@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20220127030858.3269036-2-ricarkol@google.com
