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-rw-r--r--tools/testing/selftests/powerpc/mce/inject-ra-err.c65
1 files changed, 65 insertions, 0 deletions
diff --git a/tools/testing/selftests/powerpc/mce/inject-ra-err.c b/tools/testing/selftests/powerpc/mce/inject-ra-err.c
new file mode 100644
index 000000000..94323c34d
--- /dev/null
+++ b/tools/testing/selftests/powerpc/mce/inject-ra-err.c
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+
+#include <errno.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+#include <sys/ioctl.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
+
+#include "vas-api.h"
+#include "utils.h"
+
+static bool faulted;
+
+static void sigbus_handler(int n, siginfo_t *info, void *ctxt_v)
+{
+ ucontext_t *ctxt = (ucontext_t *)ctxt_v;
+ struct pt_regs *regs = ctxt->uc_mcontext.regs;
+
+ faulted = true;
+ regs->nip += 4;
+}
+
+static int test_ra_error(void)
+{
+ struct vas_tx_win_open_attr attr;
+ int fd, *paste_addr;
+ char *devname = "/dev/crypto/nx-gzip";
+ struct sigaction act = {
+ .sa_sigaction = sigbus_handler,
+ .sa_flags = SA_SIGINFO,
+ };
+
+ memset(&attr, 0, sizeof(attr));
+ attr.version = 1;
+ attr.vas_id = 0;
+
+ SKIP_IF(access(devname, F_OK));
+
+ fd = open(devname, O_RDWR);
+ FAIL_IF(fd < 0);
+ FAIL_IF(ioctl(fd, VAS_TX_WIN_OPEN, &attr) < 0);
+ FAIL_IF(sigaction(SIGBUS, &act, NULL) != 0);
+
+ paste_addr = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0ULL);
+
+ /* The following assignment triggers exception */
+ mb();
+ *paste_addr = 1;
+ mb();
+
+ FAIL_IF(!faulted);
+
+ return 0;
+}
+
+int main(void)
+{
+ return test_harness(test_ra_error, "inject-ra-err");
+}
+