linux-stable.git/tools/testing/selftests/powerpc, branch v4.7.2

selftests/powerpc: Add test to check if TM SPRs are corrupted

2016-05-11T11:54:14+00:00

Testing that the TM SPRs are behaving the way they should. Uses more
threads than cpus to see if the following register values persist with
context switching:
- the FS (failure summary) flag in TEXASR
- TFIAR and TFHAR

Signed-off-by: Rashmica Gupta 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add TM test to check if TAR is corrupted

2016-05-11T11:54:13+00:00

If the transaction is aborted, the TAR should be rolled back to the
checkpointed value before the transaction began. The value written to the
TAR when the transaction is suspended should only remain there if the
transaction completes successfully.

Signed-off-by: Rashmica Gupta 
Signed-off-by: Michael Ellerman

selftests/powerpc: Add test for forking inside transaction

2016-05-11T11:54:13+00:00

This test does a fork syscall inside a transaction. Basic sniff test to see
if we can enter the kernel during a transaction.

Signed-off-by: Rashmica Gupta 
Signed-off-by: Michael Ellerman

selftests/powerpc: Standardise TM calls

2016-05-11T11:54:12+00:00

Currently tbegin, tend etc are written as opcodes or asm instructions. So
standardise these to asm instructions.

Signed-off-by: Rashmica Gupta 
Signed-off-by: Michael Ellerman

selftests/powerpc: Make reg.h common to all powerpc selftests

2016-05-11T11:54:12+00:00

Currently there is a reg.h in pmu/ebb that has defines that are useful
in other powerpc selftests so move this up into selftests/powerpc
folder. Also include in utils.h - as this is often used in self tests.
Add in some other useful register defines.

Signed-off-by: Rashmica Gupta 
Signed-off-by: Michael Ellerman

selftests/powerpc: Fix subpage_prot test to return !0 on failure

2016-05-11T11:54:02+00:00

It's helpful for automated testing if the test returns error codes back
to the calling program.

While we're here fix all the usages of %p to remove the double 0x, ie.
%p already includes 0x.

Signed-off-by: Michael Ellerman 
Reviewed-by: Aneesh Kumar K.V

selftests/powerpc: Test cp_abort during context switch

2016-05-11T11:54:01+00:00

Test that performing a copy paste sequence in userspace on P9 does not
result in a leak of the copy into the paste of another process.

This is based on Anton Blanchard's context_switch benchmarking code. It
sets up two processes tied to the same CPU, one which copies and one
which pastes.

The paste should never succeed and the test fails if it does.

This is a test for commit, "8a64904 powerpc: Add support for userspace
P9 copy paste."

Patch created with much assistance from Michael Neuling


Signed-off-by: Chris Smart 
Reviewed-by: Cyril Bur 
Signed-off-by: Michael Ellerman

selftests/powerpc: Test FPU and VMX regs in signal ucontext

2016-03-02T12:34:47+00:00

Load up the non volatile FPU and VMX regs and ensure that they are the
expected value in a signal handler

Signed-off-by: Cyril Bur 
Signed-off-by: Michael Ellerman

selftests/powerpc: Test preservation of FPU and VMX regs across preemption

2016-03-02T12:34:47+00:00

Loop in assembly checking the registers with many threads.

Signed-off-by: Cyril Bur 
Signed-off-by: Michael Ellerman

selftests/powerpc: Test the preservation of FPU and VMX regs across syscall

2016-03-02T12:34:46+00:00

Test that the non volatile floating point and Altivec registers get
correctly preserved across the fork() syscall.

fork() works nicely for this purpose, the registers should be the same for
both parent and child

Signed-off-by: Cyril Bur 
[mpe: Add include guards to basic_asm.h, minor formatting]
Signed-off-by: Michael Ellerman