Re: [Xen-devel] [PATCH 1/4] hw:i386:pc_piix: split pc_init1()

["Michael S. Tsirkin" <mst@xxxxxxxxxx>]

On Wed, Jul 30, 2014 at 04:19:58PM +0800, Chen, Tiejun wrote:
> On 2014/7/29 19:26, Michael S. Tsirkin wrote:
> >On Thu, Jul 24, 2014 at 07:30:26PM +0800, Tiejun Chen wrote:
> >>We'd like to split pc_init1 and then we can share something
> >>with other stuff.
> >>
> >>Signed-off-by: Tiejun Chen <tiejun.chen@xxxxxxxxx>
> >
> >Did you test this patch? It does not look like it can work.
> 
> Just compile but I think you're right. Here something is really wrong here,
> so this is my fault.
> 
> I will regenerate this patch and do test to double check.
> 
> Thanks
> Tiejun

Yea, and pls tell us what you tested exactly in the cover letter.

> >
> >>---
> >>  hw/i386/pc_piix.c | 93 
> >> +++++++++++++++++++++++++++++++++++++++++--------------
> >>  1 file changed, 70 insertions(+), 23 deletions(-)
> >>
> >>diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
> >>index 7081c08..2391fda 100644
> >>--- a/hw/i386/pc_piix.c
> >>+++ b/hw/i386/pc_piix.c
> >>@@ -70,34 +70,21 @@ static bool smbios_legacy_mode;
> >>  static bool gigabyte_align = true;
> >>  static bool has_reserved_memory = true;
> >>
> >>-/* PC hardware initialisation */
> >>-static void pc_init1(MachineState *machine,
> >>+static ram_addr_t below_4g_mem_size;
> >>+static ram_addr_t above_4g_mem_size;
> >>+static void pc_machine_base_init(MachineState *machine,
> >>                       int pci_enabled,
> >>-                     int kvmclock_enabled)
> >>+                     int kvmclock_enabled,
> >>+                     DeviceState *icc_bridge,
> >>+                     MemoryRegion *ram_memory,
> >>+                     MemoryRegion *pci_memory,
> >>+                     qemu_irq *gsi,
> >>+                     GSIState *gsi_state,
> >>+                     FWCfgState *fw_cfg)
> >>  {
> >>      PCMachineState *pc_machine = PC_MACHINE(machine);
> >>      MemoryRegion *system_memory = get_system_memory();
> >>-    MemoryRegion *system_io = get_system_io();
> >>-    int i;
> >>-    ram_addr_t below_4g_mem_size, above_4g_mem_size;
> >>-    PCIBus *pci_bus;
> >>-    ISABus *isa_bus;
> >>-    PCII440FXState *i440fx_state;
> >>-    int piix3_devfn = -1;
> >>-    qemu_irq *cpu_irq;
> >>-    qemu_irq *gsi;
> >>-    qemu_irq *i8259;
> >>-    qemu_irq *smi_irq;
> >>-    GSIState *gsi_state;
> >>-    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
> >>-    BusState *idebus[MAX_IDE_BUS];
> >>-    ISADevice *rtc_state;
> >>-    ISADevice *floppy;
> >>-    MemoryRegion *ram_memory;
> >>-    MemoryRegion *pci_memory;
> >>      MemoryRegion *rom_memory;
> >>-    DeviceState *icc_bridge;
> >>-    FWCfgState *fw_cfg = NULL;
> >>      PcGuestInfo *guest_info;
> >>      ram_addr_t lowmem;
> >>
> >>@@ -190,6 +177,20 @@ static void pc_init1(MachineState *machine,
> >>      } else {
> >>          gsi = qemu_allocate_irqs(gsi_handler, gsi_state, GSI_NUM_PINS);
> >>      }
> >>+}
> >>+
> >>+static void pc_machine_pci_bus_init(MachineState *machine,
> >>+                     int pci_enabled,
> >>+                     PCII440FXState *i440fx_state,
> >>+                     int piix3_devfn,
> >>+                     PCIBus *pci_bus,
> >>+                     ISABus *isa_bus,
> >>+                     qemu_irq *gsi,
> >>+                     MemoryRegion *pci_memory,
> >>+                     MemoryRegion *ram_memory)
> >>+{
> >>+    MemoryRegion *system_memory = get_system_memory();
> >>+    MemoryRegion *system_io = get_system_io();
> >>
> >>      if (pci_enabled) {
> >>          pci_bus = i440fx_init(&i440fx_state, &piix3_devfn, &isa_bus, gsi,
> >>@@ -203,6 +204,28 @@ static void pc_init1(MachineState *machine,
> >>          isa_bus = isa_bus_new(NULL, system_io);
> >>          no_hpet = 1;
> >>      }
> >>+}
> >>+
> >>+static void pc_machine_device_init(MachineState *machine,
> >>+                     int pci_enabled,
> >>+                     GSIState *gsi_state,
> >>+                     DeviceState *icc_bridge,
> >>+                     int piix3_devfn,
> >>+                     FWCfgState *fw_cfg,
> >>+                     PCIBus *pci_bus,
> >>+                     ISABus *isa_bus,
> >>+                     qemu_irq *gsi)
> >>+{
> >>+    int i;
> >>+    DriveInfo *hd[MAX_IDE_BUS * MAX_IDE_DEVS];
> >>+    BusState *idebus[MAX_IDE_BUS];
> >>+    qemu_irq *smi_irq;
> >>+    PCMachineState *pc_machine = PC_MACHINE(machine);
> >>+    qemu_irq *cpu_irq;
> >>+    qemu_irq *i8259;
> >>+    ISADevice *rtc_state;
> >>+    ISADevice *floppy;
> >>+
> >>      isa_bus_irqs(isa_bus, gsi);
> >>
> >>      if (kvm_irqchip_in_kernel()) {
> >>@@ -290,6 +313,30 @@ static void pc_init1(MachineState *machine,
> >>      }
> >>  }
> >>
> >>+/* PC hardware initialisation */
> >>+static void pc_init1(MachineState *machine,
> >>+                     int pci_enabled,
> >>+                     int kvmclock_enabled)
> >>+{
> >>+    PCIBus *pci_bus = NULL;
> >>+    ISABus *isa_bus = NULL;
> >>+    PCII440FXState *i440fx_state = NULL;
> >>+    int piix3_devfn = -1;
> >>+    qemu_irq *gsi = NULL;
> >>+    GSIState *gsi_state = NULL;
> >>+    MemoryRegion *ram_memory = NULL;
> >>+    MemoryRegion *pci_memory = NULL;
> >>+    DeviceState *icc_bridge = NULL;
> >>+    FWCfgState *fw_cfg = NULL;
> >
> >These are set to NULL here and never modified below.
> >Why does it make sense?
> >
> >
> >>+
> >>+    pc_machine_base_init(machine, pci_enabled, kvmclock_enabled, 
> >>icc_bridge,
> >>+                    ram_memory, pci_memory, gsi, gsi_state, fw_cfg);
> >>+    pc_machine_pci_bus_init(machine, pci_enabled, i440fx_state, 
> >>piix3_devfn,
> >>+                    pci_bus, isa_bus, gsi, pci_memory, ram_memory);
> >>+    pc_machine_device_init(machine, pci_enabled, gsi_state, icc_bridge,
> >>+                    piix3_devfn, fw_cfg, pci_bus, isa_bus, gsi);
> >>+}
> >>+
> >>  static void pc_init_pci(MachineState *machine)
> >>  {
> >>      pc_init1(machine, 1, 1);
> >>--
> >>1.9.1
> >

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