[PATCH v3 4/4] target/ppc: exit(1) on failure in kvmppc_get_clockfreq()

[Daniel Henrique Barboza <danielhb413@gmail.com>]

When running under KVM accel it is expected to have 'clock-frequency' in
the DT. Not having this attribute is too risky for both the machine
emulation and userspace.

We have a way of telling whether this error scenario might happen or not
via kvmppc_read_int_cpu_dt() now being able to report errors. From now
on, when running KVM, we will assume that 'clock-frequency' will always
be present in the DT.

Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
---
 target/ppc/kvm.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 37a312288d..14faa14da3 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -1945,9 +1945,24 @@ static uint64_t kvmppc_read_int_cpu_dt(const char *propname, Error **errp)
     return kvmppc_read_int_dt(tmp, errp);
 }
 
+/*
+ * Read the clock-frequency from the DT. On error (e.g.
+ * 'clock-frequency' is not present in the DT) will
+ * report an error and exit(1).
+ */
 uint64_t kvmppc_get_clockfreq(void)
 {
-    return kvmppc_read_int_cpu_dt("clock-frequency", NULL);
+    Error *local_err = NULL;
+    int ret;
+
+    ret = kvmppc_read_int_cpu_dt("clock-frequency", &local_err);
+
+    if (local_err) {
+        error_report_err(local_err);
+        exit(1);
+    }
+
+    return ret;
 }
 
 static int kvmppc_get_dec_bits(void)
-- 
2.36.1