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selftests/powerpc/64: Test all paths through copy routines

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The hand-coded assembler 64-bit copy routines include feature sections
that select one code path or another depending on which CPU we are
executing on.  The self-tests for these copy routines end up testing
just one path.  This adds a mechanism for selecting any desired code
path at compile time, and makes 2 or 3 versions of each test, each
using a different code path, so as to cover all the possible paths.

Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
[mpe: Add -mcpu=power4 to CFLAGS for older compilers]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Paul Mackerras
2018-08-03 20:13:04 +10:00
committed by Michael Ellerman
parent a7c81ce398
commit 98c45f51f7
7 changed files with 85 additions and 44 deletions
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14
tools/testing/selftests/powerpc/copyloops/.gitignore vendored
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@@ -1,4 +1,10 @@
copyuser_64
copyuser_power7
memcpy_64
memcpy_power7
copyuser_64_t0
copyuser_64_t1
copyuser_64_t2
copyuser_power7_t0
copyuser_power7_t1
memcpy_64_t0
memcpy_64_t1
memcpy_64_t2
memcpy_power7_t0
memcpy_power7_t1

35
tools/testing/selftests/powerpc/copyloops/Makefile
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@@ -4,18 +4,41 @@ CFLAGS += -m64
CFLAGS += -I$(CURDIR)
CFLAGS += -D SELFTEST
CFLAGS += -maltivec
CFLAGS += -mcpu=power4
# Use our CFLAGS for the implicit .S rule & set the asm machine type
ASFLAGS = $(CFLAGS) -Wa,-mpower4
TEST_GEN_PROGS := copyuser_64 copyuser_power7 memcpy_64 memcpy_power7
TEST_GEN_PROGS := copyuser_64_t0 copyuser_64_t1 copyuser_64_t2 \
copyuser_p7_t0 copyuser_p7_t1 \
memcpy_64_t0 memcpy_64_t1 memcpy_64_t2 \
memcpy_p7_t0 memcpy_p7_t1
EXTRA_SOURCES := validate.c ../harness.c
include ../../lib.mk
$(OUTPUT)/copyuser_64: CPPFLAGS += -D COPY_LOOP=test___copy_tofrom_user_base
$(OUTPUT)/copyuser_power7: CPPFLAGS += -D COPY_LOOP=test___copy_tofrom_user_power7
$(OUTPUT)/memcpy_64: CPPFLAGS += -D COPY_LOOP=test_memcpy
$(OUTPUT)/memcpy_power7: CPPFLAGS += -D COPY_LOOP=test_memcpy_power7
$(OUTPUT)/copyuser_64_t%: copyuser_64.S $(EXTRA_SOURCES)
$(CC) $(CPPFLAGS) $(CFLAGS) \
-D COPY_LOOP=test___copy_tofrom_user_base \
-D SELFTEST_CASE=$(subst copyuser_64_t,,$(notdir $@)) \
-o $@ $^
$(TEST_GEN_PROGS): $(EXTRA_SOURCES)
$(OUTPUT)/copyuser_p7_t%: copyuser_power7.S $(EXTRA_SOURCES)
$(CC) $(CPPFLAGS) $(CFLAGS) \
-D COPY_LOOP=test___copy_tofrom_user_power7 \
-D SELFTEST_CASE=$(subst copyuser_p7_t,,$(notdir $@)) \
-o $@ $^
# Strictly speaking, we only need the memcpy_64 test cases for big-endian
$(OUTPUT)/memcpy_64_t%: memcpy_64.S $(EXTRA_SOURCES)
$(CC) $(CPPFLAGS) $(CFLAGS) \
-D COPY_LOOP=test_memcpy \
-D SELFTEST_CASE=$(subst memcpy_64_t,,$(notdir $@)) \
-o $@ $^
$(OUTPUT)/memcpy_p7_t%: memcpy_power7.S $(EXTRA_SOURCES)
$(CC) $(CPPFLAGS) $(CFLAGS) \
-D COPY_LOOP=test_memcpy_power7 \
-D SELFTEST_CASE=$(subst memcpy_p7_t,,$(notdir $@)) \
-o $@ $^

21
tools/testing/selftests/powerpc/copyloops/asm/ppc_asm.h
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@@ -43,17 +43,16 @@ FUNC_START(enter_vmx_ops)
FUNC_START(exit_vmx_ops)
blr
FUNC_START(memcpy_power7)
blr
FUNC_START(__copy_tofrom_user_power7)
blr
FUNC_START(__copy_tofrom_user_base)
blr
#define BEGIN_FTR_SECTION
#define FTR_SECTION_ELSE
#define ALT_FTR_SECTION_END_IFCLR(x)
#define ALT_FTR_SECTION_END(x, y)
#define END_FTR_SECTION_IFCLR(x)
#define BEGIN_FTR_SECTION .if test_feature
#define FTR_SECTION_ELSE .else
#define ALT_FTR_SECTION_END_IFCLR(x) .endif
#define ALT_FTR_SECTION_END_IFSET(x) .endif
#define ALT_FTR_SECTION_END(x, y) .endif
#define END_FTR_SECTION_IFCLR(x) .endif
#define END_FTR_SECTION_IFSET(x) .endif
/* Default to taking the first of any alternative feature sections */
test_feature = 1