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authorMichael Ellerman <mpe@ellerman.id.au>2018-07-24 15:53:22 +1000
committerMichael Ellerman <mpe@ellerman.id.au>2018-10-20 13:26:47 +1100
commitb7683fc66eba91674e52c30f4d8e596bfb5cbcf4 (patch)
treee724c8201aa93f0d70b86ed37ee47597afefb882 /tools/testing/selftests/powerpc/include
parentpowerpc/mm: Fix page table dump to work on Radix (diff)
downloadlinux-dev-b7683fc66eba91674e52c30f4d8e596bfb5cbcf4.tar.xz
linux-dev-b7683fc66eba91674e52c30f4d8e596bfb5cbcf4.zip
selftests/powerpc: Add a test of wild bctr
This tests that a bctr (Branch to counter and link), ie. a function call, to a wildly out-of-bounds address is handled correctly. Some old kernel versions didn't handle it correctly, see eg: "powerpc/slb: Force a full SLB flush when we insert for a bad EA" https://lists.ozlabs.org/pipermail/linuxppc-dev/2017-April/157397.html Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'tools/testing/selftests/powerpc/include')
-rw-r--r--tools/testing/selftests/powerpc/include/reg.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/include/reg.h b/tools/testing/selftests/powerpc/include/reg.h
index 7f348c059bc2..52b4710469d2 100644
--- a/tools/testing/selftests/powerpc/include/reg.h
+++ b/tools/testing/selftests/powerpc/include/reg.h
@@ -17,6 +17,7 @@
: "memory")
#define mb() asm volatile("sync" : : : "memory");
+#define barrier() asm volatile("" : : : "memory");
#define SPRN_MMCR2 769
#define SPRN_MMCRA 770