[Qemu-devel] [PATCH v3 1/9] hw/mips/cputimer: Don't start periodic timer in KVM mode

[James Hogan <james.hogan@imgtec.com>]

From: Sanjay Lal <sanjayl@kymasys.com>

Compare/Count timer interrupts are handled in-kernel for KVM, so don't
bother starting it in QEMU.

Signed-off-by: Sanjay Lal <sanjayl@kymasys.com>
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
---
Changes in v2:
 - Expand commit message
 - Rebase on v1.7.0
 - Wrap comment
---
 hw/mips/cputimer.c | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/hw/mips/cputimer.c b/hw/mips/cputimer.c
index c8b4b00..52570fd 100644
--- a/hw/mips/cputimer.c
+++ b/hw/mips/cputimer.c
@@ -23,6 +23,7 @@
 #include "hw/hw.h"
 #include "hw/mips/cpudevs.h"
 #include "qemu/timer.h"
+#include "sysemu/kvm.h"
 
 #define TIMER_FREQ	100 * 1000 * 1000
 
@@ -141,7 +142,13 @@ static void mips_timer_cb (void *opaque)
 
 void cpu_mips_clock_init (CPUMIPSState *env)
 {
-    env->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &mips_timer_cb, env);
-    env->CP0_Compare = 0;
-    cpu_mips_store_count(env, 1);
+    /*
+     * If we're in KVM mode, don't start the periodic timer, that is handled in
+     * kernel.
+     */
+    if (!kvm_enabled()) {
+        env->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, &mips_timer_cb, env);
+        env->CP0_Compare = 0;
+        cpu_mips_store_count(env, 1);
+    }
 }
-- 
1.8.1.2