[Qemu-devel] [PATCH] timer.h: Provide monotonic time for ARM guests

[Pranith Kumar <bobby.prani@gmail.com>]

Tested and confirmed that the stretch i386 debian qcow2 image on a
raspberry pi 2 works.

Fixes: LP#: 893208 <https://bugs.launchpad.net/qemu/+bug/893208/>
Signed-off-by: Pranith Kumar <bobby.prani@gmail.com>
---
 include/qemu/timer.h | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/include/qemu/timer.h b/include/qemu/timer.h
index e1742f2f3d..14c9558da4 100644
--- a/include/qemu/timer.h
+++ b/include/qemu/timer.h
@@ -1015,6 +1015,16 @@ static inline int64_t cpu_get_host_ticks(void)
     return cur - ofs;
 }
 
+#elif defined(__arm__) || defined(__aarch64__)
+
+/* ARM does not have a user-space readble cycle counter available.
+ * This is a compromise to get monotonically increasing time.
+ */
+static inline int64_t cpu_get_host_ticks(void)
+{
+    return get_clock();
+}
+
 #else
 /* The host CPU doesn't have an easily accessible cycle counter.
    Just return a monotonically increasing value.  This will be
-- 
2.11.0