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authorSandipan Das <sandipan@linux.ibm.com>2020-06-04 16:52:50 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-06-04 19:06:27 -0700
commit473c3cc86c36026d22129660746f2f4447abb79d (patch)
tree8ff78ff22035c148169266c8887439c52c01e464 /tools
parente9506394a159a449bdf0427b71d5191b4f7fc618 (diff)
downloadlinux-473c3cc86c36026d22129660746f2f4447abb79d.tar.bz2
selftests: vm: pkeys: use the correct page size on powerpc
Both 4K and 64K pages are supported on powerpc. Parts of the selftest code perform alignment computations based on the PAGE_SIZE macro which is currently hardcoded to 64K for powerpc. This causes some test failures on kernels configured with 4K page size. In some cases, we need to enforce function alignment on page size. Since this can only be done at build time, 64K is used as the alignment factor as that also ensures 4K alignment. Signed-off-by: Sandipan Das <sandipan@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Acked-by: Dave Hansen <dave.hansen@intel.com> Cc: "Desnes A. Nunes do Rosario" <desnesn@linux.vnet.ibm.com> Cc: Florian Weimer <fweimer@redhat.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Ram Pai <linuxram@us.ibm.com> Cc: Thiago Jung Bauermann <bauerman@linux.ibm.com> Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Michal Hocko <mhocko@kernel.org> Cc: Michal Suchanek <msuchanek@suse.de> Cc: Shuah Khan <shuah@kernel.org> Link: http://lkml.kernel.org/r/5dcdfbf3353acdc90f315172e800b49f5ca21299.1585646528.git.sandipan@linux.ibm.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools')
-rw-r--r--tools/testing/selftests/vm/pkey-powerpc.h2
-rw-r--r--tools/testing/selftests/vm/protection_keys.c5
2 files changed, 6 insertions, 1 deletions
diff --git a/tools/testing/selftests/vm/pkey-powerpc.h b/tools/testing/selftests/vm/pkey-powerpc.h
index e4aa5977388b..1ebb586b2fbc 100644
--- a/tools/testing/selftests/vm/pkey-powerpc.h
+++ b/tools/testing/selftests/vm/pkey-powerpc.h
@@ -32,7 +32,7 @@
pkey-31 and exec-only key */
#define PKEY_BITS_PER_PKEY 2
#define HPAGE_SIZE (1UL << 24)
-#define PAGE_SIZE (1UL << 16)
+#define PAGE_SIZE sysconf(_SC_PAGESIZE)
static inline u32 pkey_bit_position(int pkey)
{
diff --git a/tools/testing/selftests/vm/protection_keys.c b/tools/testing/selftests/vm/protection_keys.c
index a1cb9a71e77c..fc19addcb5c8 100644
--- a/tools/testing/selftests/vm/protection_keys.c
+++ b/tools/testing/selftests/vm/protection_keys.c
@@ -146,7 +146,12 @@ void abort_hooks(void)
* will then fault, which makes sure that the fault code handles
* execute-only memory properly.
*/
+#ifdef __powerpc64__
+/* This way, both 4K and 64K alignment are maintained */
+__attribute__((__aligned__(65536)))
+#else
__attribute__((__aligned__(PAGE_SIZE)))
+#endif
void lots_o_noops_around_write(int *write_to_me)
{
dprintf3("running %s()\n", __func__);