Re: [Qemu-devel] [PATCH v4 19/23] piix: APIs for pc guest info

["Michael S. Tsirkin" <mst@redhat.com>]

On Mon, Sep 23, 2013 at 11:27:09AM +0200, Igor Mammedov wrote:
> On Sun, 22 Sep 2013 16:37:59 +0300
> "Michael S. Tsirkin" <mst@redhat.com> wrote:
> 
> > This adds APIs that will be used to fill in guest acpi tables.
> > Some required information is still lacking in QOM, so we
> > fall back on lookups by type and returning explicit types.
> > 
> > Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
> > ---
> >  include/hw/acpi/piix4.h |  8 ++++++++
> >  include/hw/i386/pc.h    |  1 +
> >  hw/acpi/piix4.c         | 44 ++++++++++++++++++++++++++++++++++++++++----
> >  hw/pci-host/piix.c      |  8 ++++++++
> >  4 files changed, 57 insertions(+), 4 deletions(-)
> >  create mode 100644 include/hw/acpi/piix4.h
> > 
> > diff --git a/include/hw/acpi/piix4.h b/include/hw/acpi/piix4.h
> > new file mode 100644
> > index 0000000..65e6fd7
> > --- /dev/null
> > +++ b/include/hw/acpi/piix4.h
> > @@ -0,0 +1,8 @@
> > +#ifndef HW_ACPI_PIIX4_H
> > +#define HW_ACPI_PIIX4_H
> > +
> > +#include "qemu/typedefs.h"
> > +
> > +Object *piix4_pm_find(void);
> > +
> > +#endif
> > diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
> > index f966cef..2a5d996 100644
> > --- a/include/hw/i386/pc.h
> > +++ b/include/hw/i386/pc.h
> > @@ -193,6 +193,7 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state, int *piix_devfn,
> >                      MemoryRegion *pci_memory,
> >                      MemoryRegion *ram_memory);
> >  
> > +PCIBus *find_i440fx(void);
> >  /* piix4.c */
> >  extern PCIDevice *piix4_dev;
> >  int piix4_init(PCIBus *bus, ISABus **isa_bus, int devfn);
> > diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
> > index 4b8c1da..3bcd890 100644
> > --- a/hw/acpi/piix4.c
> > +++ b/hw/acpi/piix4.c
> > @@ -29,6 +29,7 @@
> >  #include "exec/ioport.h"
> >  #include "hw/nvram/fw_cfg.h"
> >  #include "exec/address-spaces.h"
> > +#include "hw/acpi/piix4.h"
> >  
> >  //#define DEBUG
> >  
> > @@ -69,6 +70,8 @@ typedef struct PIIX4PMState {
> >      /*< public >*/
> >  
> >      MemoryRegion io;
> > +    uint32_t io_base;
> > +
> >      MemoryRegion io_gpe;
> >      MemoryRegion io_pci;
> >      MemoryRegion io_cpu;
> > @@ -152,14 +155,13 @@ static void apm_ctrl_changed(uint32_t val, void *arg)
> >  static void pm_io_space_update(PIIX4PMState *s)
> >  {
> >      PCIDevice *d = PCI_DEVICE(s);
> > -    uint32_t pm_io_base;
> >  
> > -    pm_io_base = le32_to_cpu(*(uint32_t *)(d->config + 0x40));
> > -    pm_io_base &= 0xffc0;
> > +    s->io_base = le32_to_cpu(*(uint32_t *)(d->config + 0x40));
> > +    s->io_base &= 0xffc0;
> >  
> >      memory_region_transaction_begin();
> >      memory_region_set_enabled(&s->io, d->config[0x80] & 1);
> > -    memory_region_set_address(&s->io, pm_io_base);
> > +    memory_region_set_address(&s->io, s->io_base);
> >      memory_region_transaction_commit();
> >  }
> >  
> > @@ -407,6 +409,28 @@ static void piix4_pm_machine_ready(Notifier *n, void *opaque)
> >          (memory_region_present(io_as, 0x2f8) ? 0x90 : 0);
> >  }
> >  
> > +static void piix4_pm_add_propeties(PIIX4PMState *s)
> > +{
> > +    static const uint8_t acpi_enable_cmd = ACPI_ENABLE;
> > +    static const uint8_t acpi_disable_cmd = ACPI_DISABLE;
> > +    static const uint32_t gpe0_blk = GPE_BASE;
> > +    static const uint32_t gpe0_blk_len = GPE_LEN;
> > +    static const uint16_t sci_int = 9;
> > +
> > +    object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_ENABLE_CMD,
> > +                                  &acpi_enable_cmd, NULL);
> > +    object_property_add_uint8_ptr(OBJECT(s), ACPI_PM_PROP_ACPI_DISABLE_CMD,
> > +                                  &acpi_disable_cmd, NULL);
> > +    object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK,
> > +                                  &gpe0_blk, NULL);
> > +    object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_GPE0_BLK_LEN,
> > +                                  &gpe0_blk_len, NULL);
> > +    object_property_add_uint16_ptr(OBJECT(s), ACPI_PM_PROP_SCI_INT,
> > +                                  &sci_int, NULL);
> > +    object_property_add_uint32_ptr(OBJECT(s), ACPI_PM_PROP_PM_IO_BASE,
> > +                                  &s->io_base, NULL);
> > +}
> > +
> >  static int piix4_pm_initfn(PCIDevice *dev)
> >  {
> >      PIIX4PMState *s = PIIX4_PM(dev);
> > @@ -456,9 +480,21 @@ static int piix4_pm_initfn(PCIDevice *dev)
> >  
> >      piix4_acpi_system_hot_add_init(pci_address_space_io(dev), dev->bus, s);
> >  
> > +    piix4_pm_add_propeties(s);
> >      return 0;
> >  }
> >  
> > +Object *piix4_pm_find(void)
> > +{
> > +    bool ambig;
> > +    Object *o = object_resolve_path_type("", TYPE_PIIX4_PM, &ambig);
> > +
> > +    if (ambig || !o) {
> > +        return NULL;
> > +    }
> > +    return o;
> > +}
> > +
> >  i2c_bus *piix4_pm_init(PCIBus *bus, int devfn, uint32_t smb_io_base,
> >                         qemu_irq sci_irq, qemu_irq smi_irq,
> >                         int kvm_enabled, FWCfgState *fw_cfg)
> > diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
> > index c041149..bad3953 100644
> > --- a/hw/pci-host/piix.c
> > +++ b/hw/pci-host/piix.c
> > @@ -416,6 +416,14 @@ PCIBus *i440fx_init(PCII440FXState **pi440fx_state,
> >      return b;
> >  }
> >  
> > +PCIBus *find_i440fx(void)
> > +{
> > +    PCIHostState *s = OBJECT_CHECK(PCIHostState,
> > +                                   object_resolve_path("/machine/i440fx", NULL),
> > +                                   TYPE_PCI_HOST_BRIDGE);
> wouldn't object_resolve_path_type() be cleaner here?

Why would it?  /machine/i440fx is an absolute path
so it's unambigious, adding type is not needed.

And if we do we'd just have to repeat TYPE_PCI_HOST_BRIDGE twice
since we need the real type anyway.

What did I miss?

> 
> > +    return s ? s->bus : NULL;
> > +}
> > +
> >  /* PIIX3 PCI to ISA bridge */
> >  static void piix3_set_irq_pic(PIIX3State *piix3, int pic_irq)
> >  {