Introduce Virtio-loopback epsilon release:

Epsilon release introduces a new compatibility layer which make virtio-loopback
design to work with QEMU and rust-vmm vhost-user backend without require any
changes.

Signed-off-by: Timos Ampelikiotis <t.ampelikiotis@virtualopensystems.com>
Change-Id: I52e57563e08a7d0bdc002f8e928ee61ba0c53dd9

1 files changed, 89 insertions, 0 deletions

diff --git a/include/hw/acpi/pcihp.h b/include/hw/acpi/pcihp.h
new file mode 100644
index 000000000..af1a169fc
--- /dev/null
+++ b/include/hw/acpi/pcihp.h
@@ -0,0 +1,89 @@
+/*
+ * QEMU<->ACPI BIOS PCI hotplug interface
+ *
+ * QEMU supports PCI hotplug via ACPI. This module
+ * implements the interface between QEMU and the ACPI BIOS.
+ * Interface specification - see docs/specs/acpi_pci_hotplug.txt
+ *
+ * Copyright (c) 2013, Red Hat Inc, Michael S. Tsirkin (mst@redhat.com)
+ * Copyright (c) 2006 Fabrice Bellard
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1 as published by the Free Software Foundation.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>
+ *
+ * Contributions after 2012-01-13 are licensed under the terms of the
+ * GNU GPL, version 2 or (at your option) any later version.
+ */
+
+#ifndef HW_ACPI_PCIHP_H
+#define HW_ACPI_PCIHP_H
+
+#include "hw/acpi/acpi.h"
+#include "hw/hotplug.h"
+
+#define ACPI_PCIHP_IO_BASE_PROP "acpi-pcihp-io-base"
+#define ACPI_PCIHP_IO_LEN_PROP "acpi-pcihp-io-len"
+
+typedef struct AcpiPciHpPciStatus {
+    uint32_t up;
+    uint32_t down;
+    uint32_t hotplug_enable;
+} AcpiPciHpPciStatus;
+
+#define ACPI_PCIHP_PROP_BSEL "acpi-pcihp-bsel"
+#define ACPI_PCIHP_MAX_HOTPLUG_BUS 256
+#define ACPI_PCIHP_BSEL_DEFAULT 0x0
+
+typedef struct AcpiPciHpState {
+    AcpiPciHpPciStatus acpi_pcihp_pci_status[ACPI_PCIHP_MAX_HOTPLUG_BUS];
+    uint32_t hotplug_select;
+    uint32_t acpi_index;
+    PCIBus *root;
+    MemoryRegion io;
+    bool legacy_piix;
+    uint16_t io_base;
+    uint16_t io_len;
+} AcpiPciHpState;
+
+void acpi_pcihp_init(Object *owner, AcpiPciHpState *, PCIBus *root,
+                     MemoryRegion *address_space_io, bool bridges_enabled,
+                     uint16_t io_base);
+
+void acpi_pcihp_device_pre_plug_cb(HotplugHandler *hotplug_dev,
+                                   DeviceState *dev, Error **errp);
+void acpi_pcihp_device_plug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
+                               DeviceState *dev, Error **errp);
+void acpi_pcihp_device_unplug_cb(HotplugHandler *hotplug_dev, AcpiPciHpState *s,
+                                 DeviceState *dev, Error **errp);
+void acpi_pcihp_device_unplug_request_cb(HotplugHandler *hotplug_dev,
+                                         AcpiPciHpState *s, DeviceState *dev,
+                                         Error **errp);
+
+/* Called on reset */
+void acpi_pcihp_reset(AcpiPciHpState *s, bool acpihp_root_off);
+
+extern const VMStateDescription vmstate_acpi_pcihp_pci_status;
+
+bool vmstate_acpi_pcihp_use_acpi_index(void *opaque, int version_id);
+
+#define VMSTATE_PCI_HOTPLUG(pcihp, state, test_pcihp, test_acpi_index) \
+        VMSTATE_UINT32_TEST(pcihp.hotplug_select, state, \
+                            test_pcihp), \
+        VMSTATE_STRUCT_ARRAY_TEST(pcihp.acpi_pcihp_pci_status, state, \
+                                  ACPI_PCIHP_MAX_HOTPLUG_BUS, \
+                                  test_pcihp, 1, \
+                                  vmstate_acpi_pcihp_pci_status, \
+                                  AcpiPciHpPciStatus), \
+        VMSTATE_UINT32_TEST(pcihp.acpi_index, state, \
+                            test_acpi_index)
+
+#endif