[Qemu-devel] [PATCH v6 2/5] hpet: enable to entitle more irq pins for hpet

[Liu Ping Fan]

On q35, IRQ2/8 can be reserved for hpet timer 0/1. And pin 16~23
of ioapic can be dynamically assigned to hpet as guest chooses.
So we introduce intcap property to do that. (currently, its value
is IRQ2. Later, it should be set by board.)

Signed-off-by: Liu Ping Fan <address@hidden>
---
 hw/timer/hpet.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/hw/timer/hpet.c b/hw/timer/hpet.c
index 8429eb3..5b11be4 100644
--- a/hw/timer/hpet.c
+++ b/hw/timer/hpet.c
@@ -25,6 +25,7 @@
  */
 
 #include "hw/hw.h"
+#include "hw/boards.h"
 #include "hw/i386/pc.h"
 #include "ui/console.h"
 #include "qemu/timer.h"
@@ -42,6 +43,9 @@
 
 #define HPET_MSI_SUPPORT        0
 
+/* Will fix: intcap is set by board, and should be 0 if nobody sets. */
+#define HPET_TN_INT_CAP_DEFAULT 0x4ULL
+
 #define TYPE_HPET "hpet"
 #define HPET(obj) OBJECT_CHECK(HPETState, (obj), TYPE_HPET)
 
@@ -73,6 +77,7 @@ typedef struct HPETState {
     uint8_t rtc_irq_level;
     qemu_irq pit_enabled;
     uint8_t num_timers;
+    uint32_t intcap;
     HPETTimer timer[HPET_MAX_TIMERS];
 
     /* Memory-mapped, software visible registers */
@@ -663,8 +668,8 @@ static void hpet_reset(DeviceState *d)
         if (s->flags & (1 << HPET_MSI_SUPPORT)) {
             timer->config |= HPET_TN_FSB_CAP;
         }
-        /* advertise availability of ioapic inti2 */
-        timer->config |=  0x00000004ULL << 32;
+        /* advertise availability of ioapic int */
+        timer->config |=  (uint64_t)s->intcap << 32;
         timer->period = 0ULL;
         timer->wrap_flag = 0;
     }
@@ -753,6 +758,7 @@ static void hpet_realize(DeviceState *dev, Error **errp)
 static Property hpet_device_properties[] = {
     DEFINE_PROP_UINT8("timers", HPETState, num_timers, HPET_MIN_TIMERS),
     DEFINE_PROP_BIT("msi", HPETState, flags, HPET_MSI_SUPPORT, false),
+    DEFINE_PROP_UINT32("intcap", HPETState, intcap, HPET_TN_INT_CAP_DEFAULT),
     DEFINE_PROP_END_OF_LIST(),
 };
 
-- 
1.8.1.4