linux-stable.git/tools/testing/selftests/powerpc/include/utils.h, branch linux-5.0.y

selftests/powerpc: Create a new SKIP_IF macro

2018-11-25T06:11:22+00:00

This patch creates a new macro that skips a test and prints a message to
stderr. This is useful to give an idea why the tests is being skipped,
other than just skipping the test blindly.

Signed-off-by: Breno Leitao 
Reviewed-by: Thiago Jung Bauermann 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add test to verify rfi flush across a system call

2018-10-20T02:26:47+00:00

This adds a test to verify proper functioning of the rfi flush
capability implemented to mitigate meltdown. The test works by
measuring the number of L1d cache misses encountered while loading
data from memory. Across a system call, since the L1d cache is flushed
when rfi_flush is enabled, the number of cache misses is expected to
be relative to the number of cachelines corresponding to the data
being loaded.

The current system setting is reflected via powerpc/rfi_flush under
debugfs (assumed to be /sys/kernel/debug/). This test verifies the
expected result with rfi_flush enabled as well as when it is disabled.

Signed-off-by: Anton Blanchard 
Signed-off-by: Michael Ellerman 
Signed-off-by: Naveen N. Rao 
[mpe: Add SPDX tags, clang format, skip if the debugfs is missing, use
 __u64 and SANE_USERSPACE_TYPES to avoid printf() build errors.]
Signed-off-by: Michael Ellerman

selftests/powerpc: Move UCONTEXT_NIA() into utils.h

2018-10-20T02:26:47+00:00

... so that it can be used by others.

Signed-off-by: Naveen N. Rao 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add a helper for checking if we're on ppc64le

2018-08-07T11:49:25+00:00

Some of our selftests have only been tested on ppc64le and crash or
behave weirdly on ppc64/ppc32. So add a helper for checking the UTS
machine.

Signed-off-by: Michael Ellerman

selftests/powerpc: Refactor the AUXV routines

2017-03-20T08:02:49+00:00

Refactor the AUXV routines so they are more composable. In a future test
we want to look for many AUXV entries and we don't want to have to read
/proc/self/auxv each time.

Signed-off-by: Michael Ellerman

selftests/powerpc: Move shared headers into new include dir

2016-11-17T06:11:47+00:00

There are some functions, especially register related, which can
be shared across multiple selftests/powerpc test directories.

This patch creates a new include directory to store those shared
files, so that the file layout becomes more neat.

Signed-off-by: Simon Guo 
[mpe: Reworked to move the headers only]
Signed-off-by: Michael Ellerman