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[Qemu-devel] [PATCH] timer.h: Provide monotonic time for ARM guests
From: |
Pranith Kumar |
Subject: |
[Qemu-devel] [PATCH] timer.h: Provide monotonic time for ARM guests |
Date: |
Sat, 15 Apr 2017 15:29:30 -0400 |
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 <address@hidden>
---
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
- [Qemu-devel] [PATCH] timer.h: Provide monotonic time for ARM guests,
Pranith Kumar <=