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selftests/powerpc: Import Anton's memcpy / copy_tofrom_user tests

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Turn Anton's memcpy / copy_tofrom_user test into something that can
live in tools/testing/selftests.

It requires one turd in arch/powerpc/lib/memcpy_64.S, but it's pretty
harmless IMHO.

We are sailing very close to the wind with the feature macros. We define
them to nothing, which currently means we get a few extra nops and
include the unaligned calls.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Michael Ellerman
2014-01-21 15:22:17 +11:00
committed by Benjamin Herrenschmidt
parent 55672ecfa2
commit 22d651dcef
11 changed files with 224 additions and 1 deletions
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2
arch/powerpc/lib/memcpy_64.S
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@@ -14,7 +14,9 @@ _GLOBAL(memcpy)
BEGIN_FTR_SECTION
std r3,48(r1) /* save destination pointer for return value */
FTR_SECTION_ELSE
#ifndef SELFTEST
b memcpy_power7
#endif
ALT_FTR_SECTION_END_IFCLR(CPU_FTR_VMX_COPY)
PPC_MTOCRF(0x01,r5)
cmpldi cr1,r5,16