From: bellard <bellard@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Mon, 1 May 2006 12:43:29 +0000 (+0000)
Subject: fix for hosts resuming from software suspend (initial patch by John Coiner)
X-Git-Tag: release_0_8_1~14
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=eade0f192eef92f6c43ab036407cff46148be842;p=thirdparty%2Fqemu.git

fix for hosts resuming from software suspend (initial patch by John Coiner)


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@1884 c046a42c-6fe2-441c-8c8c-71466251a162
---

diff --git a/vl.c b/vl.c
index 26d3cce58e3..8984c489e76 100644
--- a/vl.c
+++ b/vl.c
@@ -558,6 +558,7 @@ int64_t cpu_get_real_ticks(void)
 #error unsupported CPU
 #endif
 
+static int64_t cpu_ticks_prev;
 static int64_t cpu_ticks_offset;
 static int cpu_ticks_enabled;
 
@@ -566,7 +567,15 @@ static inline int64_t cpu_get_ticks(void)
     if (!cpu_ticks_enabled) {
         return cpu_ticks_offset;
     } else {
-        return cpu_get_real_ticks() + cpu_ticks_offset;
+        int64_t ticks;
+        ticks = cpu_get_real_ticks();
+        if (cpu_ticks_prev > ticks) {
+            /* Note: non increasing ticks may happen if the host uses
+               software suspend */
+            cpu_ticks_offset += cpu_ticks_prev - ticks;
+        }
+        cpu_ticks_prev = ticks;
+        return ticks + cpu_ticks_offset;
     }
 }