linux-stable.git/tools/testing/selftests/powerpc, branch linux-4.3.y

selftests/powerpc: Fix build failure of load_unaligned_zeropad test

2015-10-13T04:08:37+00:00

Commit 7a5692e6e533 ("arch/powerpc: provide zero_bytemask() for
big-endian") added a call to __fls() in our word-at-a-time.h. That was
fine for the kernel build but missed the fact that we also use
word-at-a-time.h in a userspace test.

Pulling in the kernel version of __fls() gets messy, so just define our
own, it's unlikely to change often.

Fixes: 7a5692e6e533 ("arch/powerpc: provide zero_bytemask() for big-endian")
Signed-off-by: Michael Ellerman

selftests/powerpc: Install tempfile so the subpage_prot_file test works

2015-08-17T08:28:49+00:00

We forgot to install the tempfile, so when the selftests are installed
and then run the subpage_prot_file test fails.

Signed-off-by: Michael Ellerman

powerpc/tm: Abort syscalls in active transactions

2015-06-19T07:10:28+00:00

This patch changes the syscall handler to doom (tabort) active
transactions when a syscall is made and return very early without
performing the syscall and keeping side effects to a minimum (no CPU
accounting or system call tracing is performed). Also included is a
new HWCAP2 bit, PPC_FEATURE2_HTM_NOSC, to indicate this
behaviour to userspace.

Currently, the system call instruction automatically suspends an
active transaction which causes side effects to persist when an active
transaction fails.

This does change the kernel's behaviour, but in a way that was
documented as unsupported.  It doesn't reduce functionality as
syscalls will still be performed after tsuspend; it just requires that
the transaction be explicitly suspended.  It also provides a
consistent interface and makes the behaviour of user code
substantially the same across powerpc and platforms that do not
support suspended transactions (e.g. x86 and s390).

Performance measurements using
http://ozlabs.org/~anton/junkcode/null_syscall.c indicate the cost of
a normal (non-aborted) system call increases by about 0.25%.

Signed-off-by: Sam Bobroff 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add gitignore file for the new DSCR tests

2015-06-07T09:38:20+00:00

This patch adds .gitignore for all the newly added DSCR tests.

Signed-off-by: Anshuman Khandual 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add thread based stress test for DSCR sysfs interfaces

2015-06-07T09:38:18+00:00

This patch adds a test to update the system wide DSCR value repeatedly
and then verifies that any thread on any given CPU on the system must be
able to see the same DSCR value whether its is being read through the
problem state based SPR or the privilege state based SPR.

Signed-off-by: Anshuman Khandual 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add test for all DSCR sysfs interfaces

2015-06-07T09:37:58+00:00

This test continuously updates the system wide DSCR default value in the
sysfs interface and makes sure that the same is reflected across all the
sysfs interfaces for each individual CPUs present on the system.

Acked-by: Shuah Khan 
Signed-off-by: Anshuman Khandual 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add test for DSCR inheritence across fork & exec

2015-06-07T09:37:31+00:00

This patch adds a test case to verify that the changed DSCR value inside
any process would be inherited to it's child across the fork and exec
system call.

Acked-by: Shuah Khan 
Signed-off-by: Anshuman Khandual 
Signed-off-by: Anton Blanchard 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add test for DSCR value inheritence across fork

2015-06-07T09:37:11+00:00

This patch adds a test to verify that the changed DSCR value inside any
process would be inherited to it's child process across the fork system
call.

Acked-by: Shuah Khan 
Signed-off-by: Anshuman Khandual 
Signed-off-by: Anton Blanchard 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add test for DSCR SPR numbers

2015-06-07T09:36:51+00:00

This patch adds a test which verifies that the DSCR privilege and
problem state SPR read & write accesses while making sure that the
results are always the same irrespective of which SPR number is being
used.

Acked-by: Shuah Khan 
Signed-off-by: Anshuman Khandual 
Signed-off-by: Anton Blanchard 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add test for explicitly changing DSCR value

2015-06-07T09:36:08+00:00

This patch adds a test which modifies the DSCR using mtspr instruction
and verifies the change using mfspr instruction. It uses both the
privilege state SPR as well as the problem state SPR for the purpose.

Acked-by: Shuah Khan 
Signed-off-by: Anshuman Khandual 
Signed-off-by: Anton Blanchard 
Signed-off-by: Michael Ellerman