diff options
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/kvm/s390/cmma_test.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/tools/testing/selftests/kvm/s390/cmma_test.c b/tools/testing/selftests/kvm/s390/cmma_test.c index e39a724fe860..15d81b2ed7ad 100644 --- a/tools/testing/selftests/kvm/s390/cmma_test.c +++ b/tools/testing/selftests/kvm/s390/cmma_test.c @@ -34,16 +34,22 @@ static char cmma_value_buf[MAIN_PAGE_COUNT + TEST_DATA_PAGE_COUNT]; /** * Dirty CMMA attributes of exactly one page in the TEST_DATA memslot, * so use_cmma goes on and the CMMA related ioctls do something. + * Touch the page at offset 1M inside TEST_DATA to make sure its page + * tables are allocated in the host. */ static void guest_do_one_essa(void) { asm volatile( /* load TEST_DATA_START_GFN into r1 */ + " xgr 1,1\n" " llilf 1,%[start_gfn]\n" /* calculate the address from the gfn */ " sllg 1,1,12(0)\n" /* set the first page in TEST_DATA memslot to STABLE */ " .insn rrf,0xb9ab0000,2,1,1,0\n" + " agfi 1,0x100000\n" + /* also touch the first page of the second MB of TEST_DATA */ + " .insn rrf,0xb9ab0000,2,1,1,0\n" /* hypercall */ " diag 0,0,0x501\n" "0: j 0b" |