From: Ira Weiny ira.weiny@intel.com
When pkeys are not available on the hardware pkey_alloc() has specific behavior which was previously untested.
Add test for this.
Cc: Dave Hansen dave.hansen@linux.intel.com Cc: Aneesh Kumar K.V aneesh.kumar@linux.ibm.com Signed-off-by: Ira Weiny ira.weiny@intel.com --- tools/testing/selftests/vm/protection_keys.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c index 43e47de19c0d..4b733a75606f 100644 --- a/tools/testing/selftests/vm/protection_keys.c +++ b/tools/testing/selftests/vm/protection_keys.c @@ -1554,6 +1554,16 @@ void test_implicit_mprotect_exec_only_memory(int *ptr, u16 pkey) do_not_expect_pkey_fault("plain read on recently PROT_EXEC area"); }
+void test_pkey_alloc_on_unsupported_cpu(void) +{ + int test_pkey = sys_pkey_alloc(0, 0); + + dprintf1("pkey_alloc: %d (%d %s)\n", test_pkey, errno, + strerror(errno)); + pkey_assert(test_pkey < 0); + pkey_assert(errno == ENOSPC); +} + void test_mprotect_pkey_on_unsupported_cpu(int *ptr, u16 pkey) { int size = PAGE_SIZE; @@ -1688,6 +1698,8 @@ int main(int argc, char *argv[])
printf("running PKEY tests for unsupported CPU/OS\n");
+ test_pkey_alloc_on_unsupported_cpu(); + ptr = mmap(NULL, size, PROT_NONE, MAP_ANONYMOUS|MAP_PRIVATE, -1, 0); assert(ptr != (void *)-1); test_mprotect_pkey_on_unsupported_cpu(ptr, 1);