Commit c405b738 authored by Sandipan Das's avatar Sandipan Das Committed by Michael Ellerman
Browse files

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: default avatarSandipan Das <sandipan@linux.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200604125610.649668-3-sandipan@linux.ibm.com
parent 828ca432

tools/testing/selftests/powerpc/include/utils.h

+1 −0
Original line number Diff line number Diff line
@@ -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)						\

tools/testing/selftests/powerpc/mm/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -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

tools/testing/selftests/powerpc/mm/bad_accesses.c

+0 −28
Original line number Diff line number Diff line
@@ -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;

tools/testing/selftests/powerpc/utils.c

+28 −0
Original line number Diff line number Diff line
@@ -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;

}