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authorMarcelo Tosatti <mtosatti@redhat.com>2011-01-11 14:20:39 -0200
committerMichael S. Tsirkin <mst@redhat.com>2011-01-17 17:30:40 +0200
commit668643b025dcff72b9b18adb5df794be9e9be5dc (patch)
tree679d339c28cd898239a71a9063e615ef59e7a8b1 /hw/acpi_piix4.c
parent9c046d96d4d0d1fef89a30b1491775492082da9d (diff)
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acpi_piix4: expose no_hotplug attribute via i/o port
Expose no_hotplug attribute via I/O port, so ACPI BIOS can indicate removability status to guest OS. An updated seabios is required to make use of this feature (seabios.git commit ID 3c241edf3d7ef29c21). Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Tested-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Diffstat (limited to 'hw/acpi_piix4.c')
-rw-r--r--hw/acpi_piix4.c37
1 files changed, 37 insertions, 0 deletions
diff --git a/hw/acpi_piix4.c b/hw/acpi_piix4.c
index 273097d..5bbc2b5 100644
--- a/hw/acpi_piix4.c
+++ b/hw/acpi_piix4.c
@@ -37,6 +37,7 @@
#define GPE_BASE 0xafe0
#define PCI_BASE 0xae00
#define PCI_EJ_BASE 0xae08
+#define PCI_RMV_BASE 0xae0c
#define PIIX4_PCI_HOTPLUG_STATUS 2
@@ -73,6 +74,7 @@ typedef struct PIIX4PMState {
/* for pci hotplug */
struct gpe_regs gpe;
struct pci_status pci0_status;
+ uint32_t pci0_hotplug_enable;
} PIIX4PMState;
static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s);
@@ -322,6 +324,25 @@ static const VMStateDescription vmstate_acpi = {
}
};
+static void piix4_update_hotplug(PIIX4PMState *s)
+{
+ PCIDevice *dev = &s->dev;
+ BusState *bus = qdev_get_parent_bus(&dev->qdev);
+ DeviceState *qdev, *next;
+
+ s->pci0_hotplug_enable = ~0;
+
+ QLIST_FOREACH_SAFE(qdev, &bus->children, sibling, next) {
+ PCIDeviceInfo *info = container_of(qdev->info, PCIDeviceInfo, qdev);
+ PCIDevice *pdev = DO_UPCAST(PCIDevice, qdev, qdev);
+ int slot = PCI_SLOT(pdev->devfn);
+
+ if (info->no_hotplug) {
+ s->pci0_hotplug_enable &= ~(1 << slot);
+ }
+ }
+}
+
static void piix4_reset(void *opaque)
{
PIIX4PMState *s = opaque;
@@ -336,6 +357,7 @@ static void piix4_reset(void *opaque)
/* Mark SMM as already inited (until KVM supports SMM). */
pci_conf[0x5B] = 0x02;
}
+ piix4_update_hotplug(s);
}
static void piix4_powerdown(void *opaque, int irq, int power_failing)
@@ -576,6 +598,18 @@ static void pciej_write(void *opaque, uint32_t addr, uint32_t val)
PIIX4_DPRINTF("pciej write %x <== %d\n", addr, val);
}
+static uint32_t pcirmv_read(void *opaque, uint32_t addr)
+{
+ PIIX4PMState *s = opaque;
+
+ return s->pci0_hotplug_enable;
+}
+
+static void pcirmv_write(void *opaque, uint32_t addr, uint32_t val)
+{
+ return;
+}
+
static int piix4_device_hotplug(DeviceState *qdev, PCIDevice *dev,
PCIHotplugState state);
@@ -592,6 +626,9 @@ static void piix4_acpi_system_hot_add_init(PCIBus *bus, PIIX4PMState *s)
register_ioport_write(PCI_EJ_BASE, 4, 4, pciej_write, bus);
register_ioport_read(PCI_EJ_BASE, 4, 4, pciej_read, bus);
+ register_ioport_write(PCI_RMV_BASE, 4, 4, pcirmv_write, s);
+ register_ioport_read(PCI_RMV_BASE, 4, 4, pcirmv_read, s);
+
pci_bus_hotplug(bus, piix4_device_hotplug, &s->dev.qdev);
}