[Qemu-devel] [PATCH] hpet: Init capability register only once

[Jan Kiszka <jan.kiszka@web.de>]

From: Jan Kiszka <jan.kiszka@siemens.com>

The capability register is read-only from guest POV, so we do not need
to update it on reset.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 hw/hpet.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/hw/hpet.c b/hw/hpet.c
index 93fc399..e9b585c 100644
--- a/hw/hpet.c
+++ b/hw/hpet.c
@@ -648,10 +648,6 @@ static void hpet_reset(DeviceState *d)
 
     s->hpet_counter = 0ULL;
     s->hpet_offset = 0ULL;
-    /* 64-bit main counter; LegacyReplacementRoute. */
-    s->capability = 0x8086a001ULL;
-    s->capability |= (s->num_timers - 1) << HPET_ID_NUM_TIM_SHIFT;
-    s->capability |= ((HPET_CLK_PERIOD) << 32);
     s->config = 0ULL;
     if (count > 0) {
         /* we don't enable pit when hpet_reset is first called (by hpet_init)
@@ -696,6 +692,11 @@ static int hpet_init(SysBusDevice *dev)
         timer->state = s;
     }
 
+    /* 64-bit main counter; LegacyReplacementRoute. */
+    s->capability = 0x8086a001ULL;
+    s->capability |= (s->num_timers - 1) << HPET_ID_NUM_TIM_SHIFT;
+    s->capability |= ((HPET_CLK_PERIOD) << 32);
+
     isa_reserve_irq(RTC_ISA_IRQ);
     qdev_init_gpio_in(&dev->qdev, hpet_handle_rtc_irq, 1);
 
-- 
1.6.0.2