[PATCH 3/3] tests/tcg/s390x: Test unaligned accesses to lowcore

[Ilya Leoshkevich]

Add a small test to avoid regressions.

Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
---
 tests/tcg/s390x/Makefile.softmmu-target |  9 +++++++++
 tests/tcg/s390x/unaligned-lowcore.S     | 24 ++++++++++++++++++++++++
 2 files changed, 33 insertions(+)
 create mode 100644 tests/tcg/s390x/Makefile.softmmu-target
 create mode 100644 tests/tcg/s390x/unaligned-lowcore.S

diff --git a/tests/tcg/s390x/Makefile.softmmu-target 
b/tests/tcg/s390x/Makefile.softmmu-target
new file mode 100644
index 0000000000..fdee4a7616
--- /dev/null
+++ b/tests/tcg/s390x/Makefile.softmmu-target
@@ -0,0 +1,9 @@
+S390X_SRC=$(SRC_PATH)/tests/tcg/s390x
+VPATH+=$(S390X_SRC)
+QEMU_OPTS=-device mmio-debug-exit,base=0x2000 -kernel
+
+%: %.S
+       $(CC) -march=z13 -m64 -nostartfiles -static -Wl,-Ttext=0 \
+               -Wl,--build-id=none $< -o $@
+
+TESTS += unaligned-lowcore
diff --git a/tests/tcg/s390x/unaligned-lowcore.S 
b/tests/tcg/s390x/unaligned-lowcore.S
new file mode 100644
index 0000000000..2b34c3d5ef
--- /dev/null
+++ b/tests/tcg/s390x/unaligned-lowcore.S
@@ -0,0 +1,24 @@
+    .org 0x1D0                 /* Program new PSW */
+    .quad 0x180000000, _pgm    /* BA, EA */
+    .org 0x200                 /* lowcore padding */
+
+    .globl _start
+_start:
+    lctlg %c0,%c0,_c0
+    vst %v0,_unaligned
+    mviy _exit,0
+
+_pgm:
+    mviy _exit,1
+
+    .align 8
+_c0:
+    .quad 0x10060000           /* lowcore protection, AFP, VX */
+
+    .byte 0
+_unaligned:
+    .octa 0
+
+    .org 0x2000                /* mmio-debug-exit base */
+_exit:
+    .byte 0
-- 
2.35.3