diff options
| author | Thomas Huth <thuth@redhat.com> | 2019-07-31 17:15:24 +0200 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2019-08-02 15:44:23 +0200 |
| commit | f90f57b3971a3370be5a3cf02ae783b4bf728b7f (patch) | |
| tree | 4a57cdb4946f22f05b5e2ff7ec0880c6c8c92b53 /tools/testing/selftests/kvm/s390x | |
| parent | 2040f414d12f31be3e73eb3f5048d2b1cdec48f6 (diff) | |
KVM: selftests: Implement ucall() for s390x
On s390x, we can neither exit via PIO nor MMIO, but have to use an
instruction like DIAGNOSE. Now that ucall() is implemented, we can
use it in the sync_reg_test on s390x, too.
Reviewed-by: Andrew Jones <drjones@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
Link: https://lore.kernel.org/r/20190731151525.17156-3-thuth@redhat.com
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'tools/testing/selftests/kvm/s390x')
| -rw-r--r-- | tools/testing/selftests/kvm/s390x/sync_regs_test.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/tools/testing/selftests/kvm/s390x/sync_regs_test.c b/tools/testing/selftests/kvm/s390x/sync_regs_test.c index e85ff0d69548..bbc93094519b 100644 --- a/tools/testing/selftests/kvm/s390x/sync_regs_test.c +++ b/tools/testing/selftests/kvm/s390x/sync_regs_test.c @@ -25,9 +25,11 @@ static void guest_code(void) { + register u64 stage asm("11") = 0; + for (;;) { - asm volatile ("diag 0,0,0x501"); - asm volatile ("ahi 11,1"); + GUEST_SYNC(0); + asm volatile ("ahi %0,1" : : "r"(stage)); } } |