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[6/7] icount: make icount extra computed on icount clock as well.

Message ID 1406849835-4288-7-git-send-email-fred.konrad@greensocs.com
State New
Headers show

Commit Message

fred.konrad@greensocs.com July 31, 2014, 11:37 p.m. UTC 
From: KONRAD Frederic <fred.konrad@greensocs.com>

This takes icount clock in account for icount extra computation so icount
clock's timers will be triggered at the exact time.

Signed-off-by: KONRAD Frederic <fred.konrad@greensocs.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
---
 cpus.c | 10 ++++++++++
 1 file changed, 10 insertions(+)
diff mbox

Patch

diff --git a/cpus.c b/cpus.c
index 8bd3423..f63872b 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1323,6 +1323,7 @@  static int tcg_cpu_exec(CPUArchState *env)
     if (use_icount) {
         int64_t count;
         int64_t deadline;
+        int64_t icount_deadline;
         int decr;
         timers_state.qemu_icount -= (cpu->icount_decr.u16.low
                                     + cpu->icount_extra);
@@ -1339,6 +1340,15 @@  static int tcg_cpu_exec(CPUArchState *env)
             deadline = INT32_MAX;
         }
 
+        /*
+         * Take icount clock deadline in account too, and keep the nearest
+         * deadline.
+         */
+        icount_deadline = qemu_clock_deadline_ns_all(QEMU_CLOCK_ICOUNT);
+        if ((icount_deadline >= 0) && (icount_deadline < deadline)) {
+            deadline = icount_deadline;
+        }
+
         count = qemu_icount_round(deadline);
         timers_state.qemu_icount += count;
         decr = (count > 0xffff) ? 0xffff : count;