piix: APIs for pc guest info

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.

Reviewed-by: Gerd Hoffmann <kraxel@redhat.com>
Tested-by: Gerd Hoffmann <kraxel@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Tested-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

4 files changed, 57 insertions, 4 deletions

diff --git a/hw/acpi/piix4.c b/hw/acpi/piix4.c
index 4b8c1dadc3..3bcd890567 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 c041149320..bad3953fb5 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);
+    return s ? s->bus : NULL;
+}
+
 /* PIIX3 PCI to ISA bridge */
 static void piix3_set_irq_pic(PIIX3State *piix3, int pic_irq)
 {
diff --git a/include/hw/acpi/piix4.h b/include/hw/acpi/piix4.h
new file mode 100644
index 0000000000..65e6fd7aa0
--- /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 5aefc5ba2c..95857bee81 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -192,6 +192,7 @@ 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);