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authorPavel Zbitskiy <pavel.zbitskiy@gmail.com>2018-08-20 22:51:01 -0400
committerCornelia Huck <cohuck@redhat.com>2018-08-28 17:37:01 +0200
commit478d360cd937afe01a1234044ab04a26b73020be (patch)
tree972511fbff6d9bcc71d13811e7412ed6c9944cf7 /tests/tcg/s390x
parentdc95b31dac65adb92256e67a5f0fc88ab37404c2 (diff)
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target/s390x: fix IPM polluting irrelevant bits
Suppose psw.mask=0x0000000080000000, cc=2, r1=0 and we do "ipm 1". This command must touch only bits 32-39, so the expected output is r1=0x20000000. However, currently qemu yields r1=0x20008000, because irrelevant parts of PSW leak into r1 during program mask transfer. Signed-off-by: Pavel Zbitskiy <pavel.zbitskiy@gmail.com> Message-Id: <20180821025104.19604-5-pavel.zbitskiy@gmail.com> Reviewed-by: David Hildenbrand <david@redhat.com> Signed-off-by: Cornelia Huck <cohuck@redhat.com>
Diffstat (limited to 'tests/tcg/s390x')
-rw-r--r--tests/tcg/s390x/Makefile.target1
-rw-r--r--tests/tcg/s390x/ipm.c22
2 files changed, 23 insertions, 0 deletions
diff --git a/tests/tcg/s390x/Makefile.target b/tests/tcg/s390x/Makefile.target
index f62f950..c800a58 100644
--- a/tests/tcg/s390x/Makefile.target
+++ b/tests/tcg/s390x/Makefile.target
@@ -2,3 +2,4 @@ VPATH+=$(SRC_PATH)/tests/tcg/s390x
CFLAGS+=-march=zEC12 -m64
TESTS+=hello-s390x
TESTS+=csst
+TESTS+=ipm
diff --git a/tests/tcg/s390x/ipm.c b/tests/tcg/s390x/ipm.c
new file mode 100644
index 0000000..742f3a1
--- /dev/null
+++ b/tests/tcg/s390x/ipm.c
@@ -0,0 +1,22 @@
+#include <stdint.h>
+#include <unistd.h>
+
+int main(void)
+{
+ uint32_t op1 = 0x55555555;
+ uint32_t op2 = 0x44444444;
+ uint64_t cc = 0xffffffffffffffffull;
+
+ asm volatile(
+ " clc 0(4,%[op1]),0(%[op2])\n"
+ " ipm %[cc]\n"
+ : [cc] "+r" (cc)
+ : [op1] "r" (&op1),
+ [op2] "r" (&op2)
+ : "cc");
+ if (cc != 0xffffffff20ffffffull) {
+ write(1, "bad cc\n", 7);
+ return 1;
+ }
+ return 0;
+}