Commit fe2a1bb1 authored by Michael Ellerman's avatar Michael Ellerman
Browse files

selftests/powerpc: Add test of load_unaligned_zero_pad() 



It is a rarely exercised case, so we want to have a test to ensure it
works as required.

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent de5946c0

arch/powerpc/include/asm/word-at-a-time.h

+12 −1
Original line number Diff line number Diff line
@@ -116,6 +116,15 @@ static inline unsigned long prep_zero_mask(unsigned long a, unsigned long bits, 


#endif



/*

 * We use load_unaligned_zero() in a selftest, which builds a userspace

 * program. Some linker scripts seem to discard the .fixup section, so allow

 * the test code to use a different section name.

 */

#ifndef FIXUP_SECTION

#define FIXUP_SECTION ".fixup"

#endif



static inline unsigned long load_unaligned_zeropad(const void *addr)

{

	unsigned long ret, offset, tmp;
@@ -123,7 +132,7 @@ static inline unsigned long load_unaligned_zeropad(const void *addr) 
	asm(

	"1:	" PPC_LL "%[ret], 0(%[addr])\n"

	"2:\n"

	".section .fixup,\"ax\"\n"

	".section " FIXUP_SECTION ",\"ax\"\n"

	"3:	"

#ifdef __powerpc64__

	"clrrdi		%[tmp], %[addr], 3\n\t"
@@ -156,4 +165,6 @@ static inline unsigned long load_unaligned_zeropad(const void *addr) 
	return ret;

}



#undef FIXUP_SECTION



#endif /* _ASM_WORD_AT_A_TIME_H */

tools/testing/selftests/powerpc/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -13,7 +13,7 @@ CFLAGS := -Wall -O2 -flto -Wall -Werror -DGIT_VERSION='"$(GIT_VERSION)"' -I$(CUR 


export CC CFLAGS



TARGETS = pmu copyloops mm tm

TARGETS = pmu copyloops mm tm primitives



endif

tools/testing/selftests/powerpc/primitives/Makefile

0 → 100644
+17 −0
Original line number Diff line number Diff line 
CFLAGS += -I$(CURDIR)



PROGS := load_unaligned_zeropad



all: $(PROGS)



$(PROGS): ../harness.c



run_tests: all

	@-for PROG in $(PROGS); do \

		./$$PROG; \

	done;



clean:

	rm -f $(PROGS) *.o



.PHONY: all run_tests clean

tools/testing/selftests/powerpc/primitives/asm/asm-compat.h

0 → 120000
+1 −0
Original line number Diff line number Diff line 
../.././../../../../arch/powerpc/include/asm/asm-compat.h
 
 No newline at end of file

tools/testing/selftests/powerpc/primitives/asm/ppc-opcode.h

0 → 100644
+0 −0

Empty file added.