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selftests/powerpc: Move Hash MMU check to utilities 

This moves a function to test if the MMU is in Hash mode
under the generic test utilities.

Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200604125610.649668-3-sandipan@linux.ibm.com
This commit is contained in:
Sandipan Das 2020-06-04 18:26:09 +05:30 committed by Michael Ellerman
parent 828ca4320d
commit c405b738da
4 changed files with 30 additions and 29 deletions
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1
tools/testing/selftests/powerpc/include/utils.h
View File

@ -60,6 +60,7 @@ static inline bool have_hwcap2(unsigned long ftr2)
#endif
bool is_ppc64le(void);
int using_hash_mmu(bool *using_hash);
/* Yes, this is evil */
#define FAIL_IF(x) \

2
tools/testing/selftests/powerpc/mm/Makefile
View File

@ -10,7 +10,7 @@ TEST_GEN_FILES := tempfile
top_srcdir = ../../../../..
include ../../lib.mk
$(TEST_GEN_PROGS): ../harness.c
$(TEST_GEN_PROGS): ../harness.c ../utils.c
$(OUTPUT)/prot_sao: ../utils.c

28
tools/testing/selftests/powerpc/mm/bad_accesses.c
View File

@ -64,34 +64,6 @@ int bad_access(char *p, bool write)
return 0;
}
static int using_hash_mmu(bool *using_hash)
{
char line[128];
FILE *f;
int rc;
f = fopen("/proc/cpuinfo", "r");
FAIL_IF(!f);
rc = 0;
while (fgets(line, sizeof(line), f) != NULL) {
if (strcmp(line, "MMU : Hash\n") == 0) {
*using_hash = true;
goto out;
}
if (strcmp(line, "MMU : Radix\n") == 0) {
*using_hash = false;
goto out;
}
}
rc = -1;
out:
fclose(f);
return rc;
}
static int test(void)
{
unsigned long i, j, addr, region_shift, page_shift, page_size;

28
tools/testing/selftests/powerpc/utils.c
View File

@ -293,3 +293,31 @@ void set_dscr(unsigned long val)
asm volatile("mtspr %1,%0" : : "r" (val), "i" (SPRN_DSCR));
}
int using_hash_mmu(bool *using_hash)
{
char line[128];
FILE *f;
int rc;
f = fopen("/proc/cpuinfo", "r");
FAIL_IF(!f);
rc = 0;
while (fgets(line, sizeof(line), f) != NULL) {
if (strcmp(line, "MMU : Hash\n") == 0) {
*using_hash = true;
goto out;
}
if (strcmp(line, "MMU : Radix\n") == 0) {
*using_hash = false;
goto out;
}
}
rc = -1;
out:
fclose(f);
return rc;
}