From 584a648e0de0b0bda49e87349f2db3b2f0f87c33 Mon Sep 17 00:00:00 2001
From: jianchunfu <jianchunfu_yewu@cmss.chinamobile.com>
Date: Thu, 4 Aug 2022 16:47:26 +0800
Subject: [PATCH 8/9] target/ppc: exit(1) on failure in kvmppc_get_clockfreq()

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: jianchunfu <jianchunfu_yewu@cmss.chinamobile.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 1a6c6b6fa0..d73563045b 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -1944,9 +1944,24 @@ 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)
-- 
2.27.0