[Qemu-devel] [RFC PATCH v2 04/12] pc: make pit configurable

[Chao Peng]

Signed-off-by: Chao Peng <chao.p.p...@linux.intel.com>
---
 hw/i386/pc.c         | 6 ++++--
 hw/i386/pc_piix.c    | 2 +-
 hw/i386/pc_q35.c     | 2 +-
 include/hw/i386/pc.h | 5 ++++-
 4 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/hw/i386/pc.c b/hw/i386/pc.c
index ea81283..1d62957 100644
--- a/hw/i386/pc.c
+++ b/hw/i386/pc.c
@@ -1520,7 +1520,8 @@ static const MemoryRegionOps ioportF0_io_ops = {
     },
 };
 
-void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
+void pc_basic_device_init(PCMachineState *pcms,
+                          ISABus *isa_bus, qemu_irq *gsi,
                           ISADevice **rtc_state,
                           bool create_fdctrl,
                           bool no_vmport,
@@ -1577,7 +1578,7 @@ void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
 
     qemu_register_boot_set(pc_boot_set, *rtc_state);
 
-    if (!xen_enabled()) {
+    if (!xen_enabled() && pcms->pit) {
         if (kvm_pit_in_kernel()) {
             pit = kvm_pit_init(isa_bus, 0x40);
         } else {
@@ -2194,6 +2195,7 @@ static void pc_machine_initfn(Object *obj)
     PC_MACHINE_DEFINE_PROP_BOOL(pcms, PC_MACHINE_SMBUS, smbus, true);
     PC_MACHINE_DEFINE_PROP_BOOL(pcms, PC_MACHINE_SATA, sata, true);
     PC_MACHINE_DEFINE_PROP_BOOL(pcms, PC_MACHINE_PIC, pic, true);
+    PC_MACHINE_DEFINE_PROP_BOOL(pcms, PC_MACHINE_PIT, pit, true);
 }
 
 static void pc_machine_reset(void)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index a07dc81..028dc0a 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -235,7 +235,7 @@ static void pc_init1(MachineState *machine,
     }
 
     /* init basic PC hardware */
-    pc_basic_device_init(isa_bus, gsi, &rtc_state, true,
+    pc_basic_device_init(pcms, isa_bus, gsi, &rtc_state, true,
                          (pcms->vmport != ON_OFF_AUTO_ON), 0x4);
 
     pc_nic_init(isa_bus, pci_bus);
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 1a961cc..d28b7b6 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -228,7 +228,7 @@ static void pc_q35_init(MachineState *machine)
     }
 
     /* init basic PC hardware */
-    pc_basic_device_init(isa_bus, gsi, &rtc_state, !mc->no_floppy,
+    pc_basic_device_init(pcms, isa_bus, gsi, &rtc_state, !mc->no_floppy,
                          (pcms->vmport != ON_OFF_AUTO_ON), 0xff0104);
 
     /* connect pm stuff to lpc */
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index d7972ea..1dc7954 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -80,6 +80,7 @@ struct PCMachineState {
     bool smbus;
     bool sata;
     bool pic;
+    bool pit;
 };
 
 #define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device"
@@ -91,6 +92,7 @@ struct PCMachineState {
 #define PC_MACHINE_SMBUS            "smbus"
 #define PC_MACHINE_SATA             "sata"
 #define PC_MACHINE_PIC              "pic"
+#define PC_MACHINE_PIT              "pit"
 
 /**
  * PCMachineClass:
@@ -262,7 +264,8 @@ void pc_memory_init(PCMachineState *pcms,
                     MemoryRegion **ram_memory);
 qemu_irq pc_allocate_cpu_irq(void);
 DeviceState *pc_vga_init(ISABus *isa_bus, PCIBus *pci_bus);
-void pc_basic_device_init(ISABus *isa_bus, qemu_irq *gsi,
+void pc_basic_device_init(PCMachineState *pcms,
+                          ISABus *isa_bus, qemu_irq *gsi,
                           ISADevice **rtc_state,
                           bool create_fdctrl,
                           bool no_vmport,
-- 
1.8.3.1