linux.git/arch/sparc/kernel, branch v4.19

Revert "sparc: Convert to using %pOFn instead of device_node.name"

2018-10-16T01:32:54+00:00

This reverts commit 0b9871a3a8cc7234c285b5d9bf66cc6712cfee7c.

Causes crashes with qemu, interacts badly with commit commit
6d0a70a284be ("vsprintf: print OF node name using full_name")
etc.

Reported-by: Guenter Roeck 
Signed-off-by: David S. Miller

sparc64: Set %l4 properly on trap return after handling signals.

2018-10-15T03:22:28+00:00

If we did some signal processing, we have to reload the pt_regs
tstate register because it's value may have changed.

In doing so we also have to extract the %pil value contained in there
anre load that into %l4.

This value is at bit 20 and thus needs to be shifted down before we
later write it into the %pil register.

Most of the time this is harmless as we are returning to userspace
and the %pil is zero for that case.

Signed-off-by: David S. Miller

sparc: Throttle perf events properly.

2018-10-12T17:33:20+00:00

Like x86 and arm, call perf_sample_event_took() in perf event
NMI interrupt handler.

Signed-off-by: David S. Miller

sparc: Fix single-pcr perf event counter management.

2018-10-12T17:31:58+00:00

It is important to clear the hw->state value for non-stopped events
when they are added into the PMU.  Otherwise when the event is
scheduled out, we won't read the counter because HES_UPTODATE is still
set.  This breaks 'perf stat' and similar use cases, causing all the
events to show zero.

This worked for multi-pcr because we make explicit sparc_pmu_start()
calls in calculate_multiple_pcrs().  calculate_single_pcr() doesn't do
this because the idea there is to accumulate all of the counter
settings into the single pcr value.  So we have to add explicit
hw->state handling there.

Like x86, we use the PERF_HES_ARCH bit to track truly stopped events
so that we don't accidently start them on a reload.

Related to all of this, sparc_pmu_start() is missing a userpage update
so add it.

Signed-off-by: David S. Miller

sparc: Wire up io_pgetevents system call.

2018-10-09T23:52:38+00:00

Signed-off-by: David S. Miller

sparc64: fix fall-through annotation

2018-10-08T05:42:02+00:00

Replace "fallthru" with a proper "fall through" annotation.

This fix is part of the ongoing efforts to enabling
-Wimplicit-fallthrough

Signed-off-by: Gustavo A. R. Silva 
Signed-off-by: David S. Miller

sparc32: fix fall-through annotation

2018-10-08T05:42:02+00:00

Replace "fallthru" with a proper "fall through" annotation.

This fix is part of the ongoing efforts to enabling
-Wimplicit-fallthrough

Signed-off-by: Gustavo A. R. Silva 
Signed-off-by: David S. Miller

sparc64: viohs: Remove VLA usage

2018-10-08T05:42:00+00:00

In the quest to remove all stack VLA usage from the kernel[1], this
allocates a fixed size array for the maximum number of cookies and
adds a runtime sanity check.

[1] https://lkml.kernel.org/r/CA+55aFzCG-zNmZwX4A2FQpadafLfEzK6CC=qPXydAacU1
RqZWA@mail.gmail.com

Signed-off-by: Kees Cook 
Signed-off-by: David S. Miller

sparc: Convert to using %pOFn instead of device_node.name

2018-10-08T05:41:07+00:00

In preparation to remove the node name pointer from struct device_node,
convert printf users to use the %pOFn format specifier.

Cc: "David S. Miller" 
Cc: sparclinux@vger.kernel.org
Signed-off-by: Rob Herring 
Signed-off-by: David S. Miller

sparc: set a default 32-bit dma mask for OF devices

2018-09-02T08:02:04+00:00

This keeps the historic default behavior for devices without a DMA mask,
but removes the warning about a lacking DMA mask for doing DMA without
a mask.

Reported-by: Meelis Roos 
Signed-off-by: Christoph Hellwig 
Tested-by: Guenter Roeck