Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

pci, pc, virtio fixes and cleanups

A bunch of fixes all over the place.
All of ACPI refactoring has been merged.
Legacy pci commands have been dropped.
virtio header cleanup
initial patches from virtio-1.0 branch

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

* remotes/mst/tags/for_upstream: (130 commits)
  acpi: drop unused code
  aml-build: comment fix
  acpi-build: fix typo in comment
  acpi: update generated files
  vhost user:support vhost user nic for non msi guests
  aml-build: fix build for glib < 2.22
  acpi: update generated files
  Makefile.target: binary depends on config-devices
  acpi-test-data: update after pci rewrite
  acpi, mem-hotplug: use PC_DIMM_SLOT_PROP in acpi_memory_plug_cb().
  pci-hotplug-old: Has been dead for five major releases, bury
  pci: Give a few helpers internal linkage
  acpi: make build_*() routines static to aml-build.c
  pc: acpi: remove not used anymore ssdt-[misc|pcihp].hex.generated blobs
  pc: acpi-build: drop template patching and create PCI bus tree dynamically
  tests: ACPI: update pc/SSDT.bridge due to new alg of PCI tree creation
  pc: acpi-build: simplify PCI bus tree generation
  tests: add ACPI blobs for qemu with bridge cases
  tests: bios-tables-test: add support for testing bridges
  tests: ACPI test blobs update due to PCI0._CRS changes
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

Conflicts:
	hw/pci/pci-hotplug-old.c

19 files changed, 257 insertions, 644 deletions

diff --git a/include/hw/acpi/aml-build.h b/include/hw/acpi/aml-build.h
new file mode 100644
index 0000000000..17d3beb5a3
--- /dev/null
+++ b/include/hw/acpi/aml-build.h
@@ -0,0 +1,191 @@
+#ifndef HW_ACPI_GEN_UTILS_H
+#define HW_ACPI_GEN_UTILS_H
+
+#include <stdint.h>
+#include <glib.h>
+#include "qemu/compiler.h"
+
+typedef enum {
+    AML_NO_OPCODE = 0,/* has only data */
+    AML_OPCODE,       /* has opcode optionally followed by data */
+    AML_PACKAGE,      /* has opcode and uses PkgLength for its length */
+    AML_EXT_PACKAGE,  /* Same as AML_PACKAGE but also has 'ExOpPrefix' */
+    AML_BUFFER,       /* data encoded as 'DefBuffer' */
+    AML_RES_TEMPLATE, /* encoded as ResourceTemplate macro */
+} AmlBlockFlags;
+
+struct Aml {
+    GArray *buf;
+
+    /*< private >*/
+    uint8_t op;
+    AmlBlockFlags block_flags;
+};
+typedef struct Aml Aml;
+
+typedef enum {
+    aml_decode10 = 0,
+    aml_decode16 = 1,
+} AmlIODecode;
+
+typedef enum {
+    aml_any_acc = 0,
+    aml_byte_acc = 1,
+    aml_word_acc = 2,
+    aml_dword_acc = 3,
+    aml_qword_acc = 4,
+    aml_buffer_acc = 5,
+} AmlFieldFlags;
+
+typedef enum {
+    aml_system_memory = 0x00,
+    aml_system_io = 0x01,
+} AmlRegionSpace;
+
+typedef enum {
+    aml_memory_range = 0,
+    aml_io_range = 1,
+    aml_bus_number_range = 2,
+} AmlResourceType;
+
+typedef enum {
+    aml_sub_decode = 1 << 1,
+    aml_pos_decode = 0
+} AmlDecode;
+
+typedef enum {
+    aml_max_fixed = 1 << 3,
+    aml_max_not_fixed = 0,
+} AmlMaxFixed;
+
+typedef enum {
+    aml_min_fixed = 1 << 2,
+    aml_min_not_fixed = 0
+} AmlMinFixed;
+
+/*
+ * ACPI 1.0b: Table 6-26 I/O Resource Flag (Resource Type = 1) Definitions
+ * _RNG field definition
+ */
+typedef enum {
+    aml_isa_only = 1,
+    aml_non_isa_only = 2,
+    aml_entire_range = 3,
+} AmlISARanges;
+
+/*
+ * ACPI 1.0b: Table 6-25 Memory Resource Flag (Resource Type = 0) Definitions
+ * _MEM field definition
+ */
+typedef enum {
+    aml_non_cacheable = 0,
+    aml_cacheable = 1,
+    aml_write_combining = 2,
+    aml_prefetchable = 3,
+} AmlCacheble;
+
+/*
+ * ACPI 1.0b: Table 6-25 Memory Resource Flag (Resource Type = 0) Definitions
+ * _RW field definition
+ */
+typedef enum {
+    aml_ReadOnly = 0,
+    aml_ReadWrite = 1,
+} AmlReadAndWrite;
+
+/**
+ * init_aml_allocator:
+ *
+ * Called for initializing API allocator which allow to use
+ * AML API.
+ * Returns: toplevel container which accumulates all other
+ * AML elements for a table.
+ */
+Aml *init_aml_allocator(void);
+
+/**
+ * free_aml_allocator:
+ *
+ * Releases all elements used by AML API, frees associated memory
+ * and invalidates AML allocator. After this call @init_aml_allocator
+ * should be called again if AML API is to be used again.
+ */
+void free_aml_allocator(void);
+
+/**
+ * aml_append:
+ * @parent_ctx: context to which @child element is added
+ * @child: element that is copied into @parent_ctx context
+ *
+ * Joins Aml elements together and helps to construct AML tables
+ * Examle of usage:
+ *   Aml *table = aml_def_block("SSDT", ...);
+ *   Aml *sb = aml_scope("\_SB");
+ *   Aml *dev = aml_device("PCI0");
+ *
+ *   aml_append(dev, aml_name_decl("HID", aml_eisaid("PNP0A03")));
+ *   aml_append(sb, dev);
+ *   aml_append(table, sb);
+ */
+void aml_append(Aml *parent_ctx, Aml *child);
+
+/* non block AML object primitives */
+Aml *aml_name(const char *name_format, ...) GCC_FMT_ATTR(1, 2);
+Aml *aml_name_decl(const char *name, Aml *val);
+Aml *aml_return(Aml *val);
+Aml *aml_int(const uint64_t val);
+Aml *aml_arg(int pos);
+Aml *aml_store(Aml *val, Aml *target);
+Aml *aml_and(Aml *arg1, Aml *arg2);
+Aml *aml_notify(Aml *arg1, Aml *arg2);
+Aml *aml_call1(const char *method, Aml *arg1);
+Aml *aml_call2(const char *method, Aml *arg1, Aml *arg2);
+Aml *aml_call3(const char *method, Aml *arg1, Aml *arg2, Aml *arg3);
+Aml *aml_call4(const char *method, Aml *arg1, Aml *arg2, Aml *arg3, Aml *arg4);
+Aml *aml_io(AmlIODecode dec, uint16_t min_base, uint16_t max_base,
+            uint8_t aln, uint8_t len);
+Aml *aml_operation_region(const char *name, AmlRegionSpace rs,
+                          uint32_t offset, uint32_t len);
+Aml *aml_irq_no_flags(uint8_t irq);
+Aml *aml_named_field(const char *name, unsigned length);
+Aml *aml_reserved_field(unsigned length);
+Aml *aml_local(int num);
+Aml *aml_string(const char *name_format, ...) GCC_FMT_ATTR(1, 2);
+Aml *aml_equal(Aml *arg1, Aml *arg2);
+Aml *aml_processor(uint8_t proc_id, uint32_t pblk_addr, uint8_t pblk_len,
+                   const char *name_format, ...) GCC_FMT_ATTR(4, 5);
+Aml *aml_eisaid(const char *str);
+Aml *aml_word_bus_number(AmlMinFixed min_fixed, AmlMaxFixed max_fixed,
+                         AmlDecode dec, uint16_t addr_gran,
+                         uint16_t addr_min, uint16_t addr_max,
+                         uint16_t addr_trans, uint16_t len);
+Aml *aml_word_io(AmlMinFixed min_fixed, AmlMaxFixed max_fixed,
+                 AmlDecode dec, AmlISARanges isa_ranges,
+                 uint16_t addr_gran, uint16_t addr_min,
+                 uint16_t addr_max, uint16_t addr_trans,
+                 uint16_t len);
+Aml *aml_dword_memory(AmlDecode dec, AmlMinFixed min_fixed,
+                      AmlMaxFixed max_fixed, AmlCacheble cacheable,
+                      AmlReadAndWrite read_and_write,
+                      uint32_t addr_gran, uint32_t addr_min,
+                      uint32_t addr_max, uint32_t addr_trans,
+                      uint32_t len);
+Aml *aml_qword_memory(AmlDecode dec, AmlMinFixed min_fixed,
+                      AmlMaxFixed max_fixed, AmlCacheble cacheable,
+                      AmlReadAndWrite read_and_write,
+                      uint64_t addr_gran, uint64_t addr_min,
+                      uint64_t addr_max, uint64_t addr_trans,
+                      uint64_t len);
+
+/* Block AML object primitives */
+Aml *aml_scope(const char *name_format, ...) GCC_FMT_ATTR(1, 2);
+Aml *aml_device(const char *name_format, ...) GCC_FMT_ATTR(1, 2);
+Aml *aml_method(const char *name, int arg_count);
+Aml *aml_if(Aml *predicate);
+Aml *aml_package(uint8_t num_elements);
+Aml *aml_buffer(void);
+Aml *aml_resource_template(void);
+Aml *aml_field(const char *name, AmlFieldFlags flags);
+Aml *aml_varpackage(uint32_t num_elements);
+
+#endif
diff --git a/include/hw/acpi/ich9.h b/include/hw/acpi/ich9.h
index 12d7a7af5f..c2d3dba0c7 100644
--- a/include/hw/acpi/ich9.h
+++ b/include/hw/acpi/ich9.h
@@ -63,6 +63,10 @@ extern const VMStateDescription vmstate_ich9_pm;
 void ich9_pm_add_properties(Object *obj, ICH9LPCPMRegs *pm, Error **errp);
 
 void ich9_pm_device_plug_cb(ICH9LPCPMRegs *pm, DeviceState *dev, Error **errp);
+void ich9_pm_device_unplug_request_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
+                                      Error **errp);
+void ich9_pm_device_unplug_cb(ICH9LPCPMRegs *pm, DeviceState *dev,
+                              Error **errp);
 
 void ich9_pm_ospm_status(AcpiDeviceIf *adev, ACPIOSTInfoList ***list);
 #endif /* HW_ACPI_ICH9_H */
diff --git a/include/hw/acpi/pc-hotplug.h b/include/hw/acpi/pc-hotplug.h
index b9db29576c..efa6ed7b7b 100644
--- a/include/hw/acpi/pc-hotplug.h
+++ b/include/hw/acpi/pc-hotplug.h
@@ -28,6 +28,7 @@
 
 #define ICH9_CPU_HOTPLUG_IO_BASE 0x0CD8
 #define PIIX4_CPU_HOTPLUG_IO_BASE 0xaf00
+#define CPU_HOTPLUG_RESOURCE_DEVICE PRES
 
 #define ACPI_MEMORY_HOTPLUG_IO_LEN 24
 #define ACPI_MEMORY_HOTPLUG_BASE 0x0a00
diff --git a/include/hw/acpi/pcihp.h b/include/hw/acpi/pcihp.h
index 9323838319..f3526d4aaf 100644
--- a/include/hw/acpi/pcihp.h
+++ b/include/hw/acpi/pcihp.h
@@ -32,6 +32,9 @@
 #include "hw/acpi/acpi.h"
 #include "migration/vmstate.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;
@@ -48,9 +51,11 @@ typedef struct AcpiPciHpState {
     PCIBus *root;
     MemoryRegion io;
     bool legacy_piix;
+    uint16_t io_base;
+    uint16_t io_len;
 } AcpiPciHpState;
 
-void acpi_pcihp_init(AcpiPciHpState *, PCIBus *root,
+void acpi_pcihp_init(Object *owner, AcpiPciHpState *, PCIBus *root,
                      MemoryRegion *address_space_io, bool bridges_enabled);
 
 void acpi_pcihp_device_plug_cb(ACPIREGS *ar, qemu_irq irq, AcpiPciHpState *s,
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index 08ab67d7fd..1b35168e96 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -104,6 +104,7 @@ struct PcGuestInfo {
     int legacy_acpi_table_size;
     bool has_acpi_build;
     bool has_reserved_memory;
+    bool rsdp_in_ram;
 };
 
 /* parallel.c */
diff --git a/include/hw/isa/isa.h b/include/hw/isa/isa.h
index cf7bd343c7..f21ceaafc6 100644
--- a/include/hw/isa/isa.h
+++ b/include/hw/isa/isa.h
@@ -21,10 +21,17 @@
 #define ISA_BUS(obj) OBJECT_CHECK(ISABus, (obj), TYPE_ISA_BUS)
 
 #define TYPE_APPLE_SMC "isa-applesmc"
+#define APPLESMC_MAX_DATA_LENGTH       32
+#define APPLESMC_PROP_IO_BASE "iobase"
 
-static inline bool applesmc_find(void)
+static inline uint16_t applesmc_port(void)
 {
-    return object_resolve_path_type("", TYPE_APPLE_SMC, NULL);
+    Object *obj = object_resolve_path_type("", TYPE_APPLE_SMC, NULL);
+
+    if (obj) {
+        return object_property_get_int(obj, APPLESMC_PROP_IO_BASE, NULL);
+    }
+    return 0;
 }
 
 typedef struct ISADeviceClass {
diff --git a/include/hw/pci/pci.h b/include/hw/pci/pci.h
index bdee464e61..be2d9b8703 100644
--- a/include/hw/pci/pci.h
+++ b/include/hw/pci/pci.h
@@ -185,7 +185,8 @@ typedef struct PCIINTxRoute {
 typedef struct PCIDeviceClass {
     DeviceClass parent_class;
 
-    int (*init)(PCIDevice *dev);
+    void (*realize)(PCIDevice *dev, Error **errp);
+    int (*init)(PCIDevice *dev);/* TODO convert to realize() and remove */
     PCIUnregisterFunc *exit;
     PCIConfigReadFunc *config_read;
     PCIConfigWriteFunc *config_write;
@@ -370,9 +371,6 @@ void pci_device_set_intx_routing_notifier(PCIDevice *dev,
                                           PCIINTxRoutingNotifier notifier);
 void pci_device_reset(PCIDevice *dev);
 
-PCIDevice *pci_nic_init(NICInfo *nd, PCIBus *rootbus,
-                        const char *default_model,
-                        const char *default_devaddr);
 PCIDevice *pci_nic_init_nofail(NICInfo *nd, PCIBus *rootbus,
                                const char *default_model,
                                const char *default_devaddr);
@@ -402,12 +400,8 @@ PCIBus *pci_device_root_bus(const PCIDevice *d);
 const char *pci_root_bus_path(PCIDevice *dev);
 PCIDevice *pci_find_device(PCIBus *bus, int bus_num, uint8_t devfn);
 int pci_qdev_find_device(const char *id, PCIDevice **pdev);
-PCIBus *pci_get_bus_devfn(int *devfnp, PCIBus *root, const char *devaddr);
 void pci_bus_get_w64_range(PCIBus *bus, Range *range);
 
-int pci_parse_devaddr(const char *addr, int *domp, int *busp,
-                      unsigned int *slotp, unsigned int *funcp);
-
 void pci_device_deassert_intx(PCIDevice *dev);
 
 typedef AddressSpace *(*PCIIOMMUFunc)(PCIBus *, void *, int);
diff --git a/include/hw/qdev-properties.h b/include/hw/qdev-properties.h
index 070006c715..57ee363b89 100644
--- a/include/hw/qdev-properties.h
+++ b/include/hw/qdev-properties.h
@@ -180,9 +180,7 @@ void qdev_prop_set_ptr(DeviceState *dev, const char *name, void *value);
 void qdev_prop_register_global(GlobalProperty *prop);
 void qdev_prop_register_global_list(GlobalProperty *props);
 int qdev_prop_check_globals(void);
-void qdev_prop_set_globals(DeviceState *dev, Error **errp);
-void qdev_prop_set_globals_for_type(DeviceState *dev, const char *typename,
-                                    Error **errp);
+void qdev_prop_set_globals(DeviceState *dev);
 void error_set_from_qdev_prop_error(Error **errp, int ret, DeviceState *dev,
                                     Property *prop, const char *value);
 
diff --git a/include/hw/virtio/dataplane/vring-accessors.h b/include/hw/virtio/dataplane/vring-accessors.h
index b508b87900..815c19b6ef 100644
--- a/include/hw/virtio/dataplane/vring-accessors.h
+++ b/include/hw/virtio/dataplane/vring-accessors.h
@@ -1,7 +1,7 @@
 #ifndef VRING_ACCESSORS_H
 #define VRING_ACCESSORS_H
 
-#include "hw/virtio/virtio_ring.h"
+#include "standard-headers/linux/virtio_ring.h"
 #include "hw/virtio/virtio.h"
 #include "hw/virtio/virtio-access.h"
 
diff --git a/include/hw/virtio/dataplane/vring.h b/include/hw/virtio/dataplane/vring.h
index e42c0fc9cc..8d97db9e2d 100644
--- a/include/hw/virtio/dataplane/vring.h
+++ b/include/hw/virtio/dataplane/vring.h
@@ -18,7 +18,7 @@
 #define VRING_H
 
 #include "qemu-common.h"
-#include "hw/virtio/virtio_ring.h"
+#include "standard-headers/linux/virtio_ring.h"
 #include "hw/virtio/virtio.h"
 
 typedef struct {
diff --git a/include/hw/virtio/virtio-balloon.h b/include/hw/virtio/virtio-balloon.h
index f863bfe27a..4ab8f541b0 100644
--- a/include/hw/virtio/virtio-balloon.h
+++ b/include/hw/virtio/virtio-balloon.h
@@ -15,6 +15,7 @@
 #ifndef _QEMU_VIRTIO_BALLOON_H
 #define _QEMU_VIRTIO_BALLOON_H
 
+#include "standard-headers/linux/virtio_balloon.h"
 #include "hw/virtio/virtio.h"
 #include "hw/pci/pci.h"
 
@@ -22,39 +23,7 @@
 #define VIRTIO_BALLOON(obj) \
         OBJECT_CHECK(VirtIOBalloon, (obj), TYPE_VIRTIO_BALLOON)
 
-/* from Linux's linux/virtio_balloon.h */
-
-/* The ID for virtio_balloon */
-#define VIRTIO_ID_BALLOON 5
-
-/* The feature bitmap for virtio balloon */
-#define VIRTIO_BALLOON_F_MUST_TELL_HOST 0 /* Tell before reclaiming pages */
-#define VIRTIO_BALLOON_F_STATS_VQ 1       /* Memory stats virtqueue */
-
-/* Size of a PFN in the balloon interface. */
-#define VIRTIO_BALLOON_PFN_SHIFT 12
-
-struct virtio_balloon_config
-{
-    /* Number of pages host wants Guest to give up. */
-    uint32_t num_pages;
-    /* Number of pages we've actually got in balloon. */
-    uint32_t actual;
-};
-
-/* Memory Statistics */
-#define VIRTIO_BALLOON_S_SWAP_IN  0   /* Amount of memory swapped in */
-#define VIRTIO_BALLOON_S_SWAP_OUT 1   /* Amount of memory swapped out */
-#define VIRTIO_BALLOON_S_MAJFLT   2   /* Number of major faults */
-#define VIRTIO_BALLOON_S_MINFLT   3   /* Number of minor faults */
-#define VIRTIO_BALLOON_S_MEMFREE  4   /* Total amount of free memory */
-#define VIRTIO_BALLOON_S_MEMTOT   5   /* Total amount of memory */
-#define VIRTIO_BALLOON_S_NR       6
-
-typedef struct VirtIOBalloonStat {
-    uint16_t tag;
-    uint64_t val;
-} QEMU_PACKED VirtIOBalloonStat;
+typedef struct virtio_balloon_stat VirtIOBalloonStat;
 
 typedef struct VirtIOBalloon {
     VirtIODevice parent_obj;
diff --git a/include/hw/virtio/virtio-blk.h b/include/hw/virtio/virtio-blk.h
index fc7d311a43..b3ffcd96b8 100644
--- a/include/hw/virtio/virtio-blk.h
+++ b/include/hw/virtio/virtio-blk.h
@@ -14,6 +14,7 @@
 #ifndef _QEMU_VIRTIO_BLK_H
 #define _QEMU_VIRTIO_BLK_H
 
+#include "standard-headers/linux/virtio_blk.h"
 #include "hw/virtio/virtio.h"
 #include "hw/block/block.h"
 #include "sysemu/iothread.h"
@@ -23,88 +24,12 @@
 #define VIRTIO_BLK(obj) \
         OBJECT_CHECK(VirtIOBlock, (obj), TYPE_VIRTIO_BLK)
 
-/* from Linux's linux/virtio_blk.h */
-
-/* The ID for virtio_block */
-#define VIRTIO_ID_BLOCK 2
-
-/* Feature bits */
-#define VIRTIO_BLK_F_BARRIER    0       /* Does host support barriers? */
-#define VIRTIO_BLK_F_SIZE_MAX   1       /* Indicates maximum segment size */
-#define VIRTIO_BLK_F_SEG_MAX    2       /* Indicates maximum # of segments */
-#define VIRTIO_BLK_F_GEOMETRY   4       /* Indicates support of legacy geometry */
-#define VIRTIO_BLK_F_RO         5       /* Disk is read-only */
-#define VIRTIO_BLK_F_BLK_SIZE   6       /* Block size of disk is available*/
-#define VIRTIO_BLK_F_SCSI       7       /* Supports scsi command passthru */
-/* #define VIRTIO_BLK_F_IDENTIFY   8       ATA IDENTIFY supported, DEPRECATED */
-#define VIRTIO_BLK_F_WCE        9       /* write cache enabled */
-#define VIRTIO_BLK_F_TOPOLOGY   10      /* Topology information is available */
-#define VIRTIO_BLK_F_CONFIG_WCE 11      /* write cache configurable */
-
-#define VIRTIO_BLK_ID_BYTES     20      /* ID string length */
-
-struct virtio_blk_config
-{
-    uint64_t capacity;
-    uint32_t size_max;
-    uint32_t seg_max;
-    uint16_t cylinders;
-    uint8_t heads;
-    uint8_t sectors;
-    uint32_t blk_size;
-    uint8_t physical_block_exp;
-    uint8_t alignment_offset;
-    uint16_t min_io_size;
-    uint32_t opt_io_size;
-    uint8_t wce;
-} QEMU_PACKED;
-
-/* These two define direction. */
-#define VIRTIO_BLK_T_IN         0
-#define VIRTIO_BLK_T_OUT        1
-
-/* This bit says it's a scsi command, not an actual read or write. */
-#define VIRTIO_BLK_T_SCSI_CMD   2
-
-/* Flush the volatile write cache */
-#define VIRTIO_BLK_T_FLUSH      4
-
-/* return the device ID string */
-#define VIRTIO_BLK_T_GET_ID     8
-
-/* Barrier before this op. */
-#define VIRTIO_BLK_T_BARRIER    0x80000000
-
-/* This is the first element of the read scatter-gather list. */
-struct virtio_blk_outhdr
-{
-    /* VIRTIO_BLK_T* */
-    uint32_t type;
-    /* io priority. */
-    uint32_t ioprio;
-    /* Sector (ie. 512 byte offset) */
-    uint64_t sector;
-};
-
-#define VIRTIO_BLK_S_OK         0
-#define VIRTIO_BLK_S_IOERR      1
-#define VIRTIO_BLK_S_UNSUPP     2
-
 /* This is the last element of the write scatter-gather list */
 struct virtio_blk_inhdr
 {
     unsigned char status;
 };
 
-/* SCSI pass-through header */
-struct virtio_scsi_inhdr
-{
-    uint32_t errors;
-    uint32_t data_len;
-    uint32_t sense_len;
-    uint32_t residual;
-};
-
 struct VirtIOBlkConf
 {
     BlockConf conf;
diff --git a/include/hw/virtio/virtio-bus.h b/include/hw/virtio/virtio-bus.h
index 0756545d4d..0d2e7b49b2 100644
--- a/include/hw/virtio/virtio-bus.h
+++ b/include/hw/virtio/virtio-bus.h
@@ -84,9 +84,6 @@ size_t virtio_bus_get_vdev_config_len(VirtioBusState *bus);
 /* Get the features of the plugged device. */
 uint32_t virtio_bus_get_vdev_features(VirtioBusState *bus,
                                     uint32_t requested_features);
-/* Set the features of the plugged device. */
-void virtio_bus_set_vdev_features(VirtioBusState *bus,
-                                  uint32_t requested_features);
 /* Get bad features of the plugged device. */
 uint32_t virtio_bus_get_vdev_bad_features(VirtioBusState *bus);
 /* Get config of the plugged device. */
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
index 6ceb5aa92e..4c2fe83b6b 100644
--- a/include/hw/virtio/virtio-net.h
+++ b/include/hw/virtio/virtio-net.h
@@ -14,49 +14,15 @@
 #ifndef _QEMU_VIRTIO_NET_H
 #define _QEMU_VIRTIO_NET_H
 
+#include "standard-headers/linux/virtio_net.h"
 #include "hw/virtio/virtio.h"
-#include "hw/pci/pci.h"
 
 #define TYPE_VIRTIO_NET "virtio-net-device"
 #define VIRTIO_NET(obj) \
         OBJECT_CHECK(VirtIONet, (obj), TYPE_VIRTIO_NET)
 
-#define ETH_ALEN    6
-
-/* from Linux's virtio_net.h */
-
-/* The ID for virtio_net */
-#define VIRTIO_ID_NET   1
-
-/* The feature bitmap for virtio net */
-#define VIRTIO_NET_F_CSUM       0       /* Host handles pkts w/ partial csum */
-#define VIRTIO_NET_F_GUEST_CSUM 1       /* Guest handles pkts w/ partial csum */
 #define VIRTIO_NET_F_CTRL_GUEST_OFFLOADS 2 /* Control channel offload
                                          * configuration support */
-#define VIRTIO_NET_F_MAC        5       /* Host has given MAC address. */
-#define VIRTIO_NET_F_GSO        6       /* Host handles pkts w/ any GSO type */
-#define VIRTIO_NET_F_GUEST_TSO4 7       /* Guest can handle TSOv4 in. */
-#define VIRTIO_NET_F_GUEST_TSO6 8       /* Guest can handle TSOv6 in. */
-#define VIRTIO_NET_F_GUEST_ECN  9       /* Guest can handle TSO[6] w/ ECN in. */
-#define VIRTIO_NET_F_GUEST_UFO  10      /* Guest can handle UFO in. */
-#define VIRTIO_NET_F_HOST_TSO4  11      /* Host can handle TSOv4 in. */
-#define VIRTIO_NET_F_HOST_TSO6  12      /* Host can handle TSOv6 in. */
-#define VIRTIO_NET_F_HOST_ECN   13      /* Host can handle TSO[6] w/ ECN in. */
-#define VIRTIO_NET_F_HOST_UFO   14      /* Host can handle UFO in. */
-#define VIRTIO_NET_F_MRG_RXBUF  15      /* Host can merge receive buffers. */
-#define VIRTIO_NET_F_STATUS     16      /* virtio_net_config.status available */
-#define VIRTIO_NET_F_CTRL_VQ    17      /* Control channel available */
-#define VIRTIO_NET_F_CTRL_RX    18      /* Control channel RX mode support */
-#define VIRTIO_NET_F_CTRL_VLAN  19      /* Control channel VLAN filtering */
-#define VIRTIO_NET_F_CTRL_RX_EXTRA 20   /* Extra RX mode control support */
-#define VIRTIO_NET_F_GUEST_ANNOUNCE 21  /* Guest can announce itself */
-#define VIRTIO_NET_F_MQ         22      /* Device supports Receive Flow
-                                         * Steering */
-
-#define VIRTIO_NET_F_CTRL_MAC_ADDR   23 /* Set MAC address */
-
-#define VIRTIO_NET_S_LINK_UP    1       /* Link is up */
-#define VIRTIO_NET_S_ANNOUNCE   2       /* Announcement is needed */
 
 #define TX_TIMER_INTERVAL 150000 /* 150 us */
 
@@ -77,72 +43,6 @@ typedef struct virtio_net_conf
 /* Maximum packet size we can receive from tap device: header + 64k */
 #define VIRTIO_NET_MAX_BUFSIZE (sizeof(struct virtio_net_hdr) + (64 << 10))
 
-struct virtio_net_config
-{
-    /* The config defining mac address ($ETH_ALEN bytes) */
-    uint8_t mac[ETH_ALEN];
-    /* See VIRTIO_NET_F_STATUS and VIRTIO_NET_S_* above */
-    uint16_t status;
-    /* Max virtqueue pairs supported by the device */
-    uint16_t max_virtqueue_pairs;
-} QEMU_PACKED;
-
-/*
- * Control virtqueue data structures
- *
- * The control virtqueue expects a header in the first sg entry
- * and an ack/status response in the last entry.  Data for the
- * command goes in between.
- */
-struct virtio_net_ctrl_hdr {
-    uint8_t class;
-    uint8_t cmd;
-};
-
-typedef uint8_t virtio_net_ctrl_ack;
-
-#define VIRTIO_NET_OK     0
-#define VIRTIO_NET_ERR    1
-
-/*
- * Control the RX mode, ie. promisucous, allmulti, etc...
- * All commands require an "out" sg entry containing a 1 byte
- * state value, zero = disable, non-zero = enable.  Commands
- * 0 and 1 are supported with the VIRTIO_NET_F_CTRL_RX feature.
- * Commands 2-5 are added with VIRTIO_NET_F_CTRL_RX_EXTRA.
- */
-#define VIRTIO_NET_CTRL_RX    0
- #define VIRTIO_NET_CTRL_RX_PROMISC      0
- #define VIRTIO_NET_CTRL_RX_ALLMULTI     1
- #define VIRTIO_NET_CTRL_RX_ALLUNI       2
- #define VIRTIO_NET_CTRL_RX_NOMULTI      3
- #define VIRTIO_NET_CTRL_RX_NOUNI        4
- #define VIRTIO_NET_CTRL_RX_NOBCAST      5
-
-/*
- * Control the MAC
- *
- * The MAC filter table is managed by the hypervisor, the guest should
- * assume the size is infinite.  Filtering should be considered
- * non-perfect, ie. based on hypervisor resources, the guest may
- * received packets from sources not specified in the filter list.
- *
- * In addition to the class/cmd header, the TABLE_SET command requires
- * two out scatterlists.  Each contains a 4 byte count of entries followed
- * by a concatenated byte stream of the ETH_ALEN MAC addresses.  The
- * first sg list contains unicast addresses, the second is for multicast.
- * This functionality is present if the VIRTIO_NET_F_CTRL_RX feature
- * is available.
- *
- * The ADDR_SET command requests one out scatterlist, it contains a
- * 6 bytes MAC address. This functionality is present if the
- * VIRTIO_NET_F_CTRL_MAC_ADDR feature is available.
- */
-struct virtio_net_ctrl_mac {
-    uint32_t entries;
-    uint8_t macs[][ETH_ALEN];
-};
-
 typedef struct VirtIONetQueue {
     VirtQueue *rx_vq;
     VirtQueue *tx_vq;
@@ -199,55 +99,6 @@ typedef struct VirtIONet {
     int announce_counter;
 } VirtIONet;
 
-#define VIRTIO_NET_CTRL_MAC    1
- #define VIRTIO_NET_CTRL_MAC_TABLE_SET        0
- #define VIRTIO_NET_CTRL_MAC_ADDR_SET         1
-
-/*
- * Control VLAN filtering
- *
- * The VLAN filter table is controlled via a simple ADD/DEL interface.
- * VLAN IDs not added may be filterd by the hypervisor.  Del is the
- * opposite of add.  Both commands expect an out entry containing a 2
- * byte VLAN ID.  VLAN filterting is available with the
- * VIRTIO_NET_F_CTRL_VLAN feature bit.
- */
-#define VIRTIO_NET_CTRL_VLAN       2
- #define VIRTIO_NET_CTRL_VLAN_ADD             0
- #define VIRTIO_NET_CTRL_VLAN_DEL             1
-
-/*
- * Control link announce acknowledgement
- *
- * VIRTIO_NET_S_ANNOUNCE bit in the status field requests link announcement from
- * guest driver. The driver is notified by config space change interrupt.  The
- * command VIRTIO_NET_CTRL_ANNOUNCE_ACK is used to indicate that the driver has
- * received the notification. It makes the device clear the bit
- * VIRTIO_NET_S_ANNOUNCE in the status field.
- */
-#define VIRTIO_NET_CTRL_ANNOUNCE       3
- #define VIRTIO_NET_CTRL_ANNOUNCE_ACK         0
-
-/*
- * Control Multiqueue
- *
- * The command VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET
- * enables multiqueue, specifying the number of the transmit and
- * receive queues that will be used. After the command is consumed and acked by
- * the device, the device will not steer new packets on receive virtqueues
- * other than specified nor read from transmit virtqueues other than specified.
- * Accordingly, driver should not transmit new packets  on virtqueues other than
- * specified.
- */
-struct virtio_net_ctrl_mq {
-    uint16_t virtqueue_pairs;
-};
-
-#define VIRTIO_NET_CTRL_MQ   4
- #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_SET        0
- #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MIN        1
- #define VIRTIO_NET_CTRL_MQ_VQ_PAIRS_MAX        0x8000
-
 /*
  * Control network offloads
  *
diff --git a/include/hw/virtio/virtio-rng.h b/include/hw/virtio/virtio-rng.h
index 14e85a5a3a..7702ff4749 100644
--- a/include/hw/virtio/virtio-rng.h
+++ b/include/hw/virtio/virtio-rng.h
@@ -14,6 +14,7 @@
 
 #include "sysemu/rng.h"
 #include "sysemu/rng-random.h"
+#include "standard-headers/linux/virtio_rng.h"
 
 #define TYPE_VIRTIO_RNG "virtio-rng-device"
 #define VIRTIO_RNG(obj) \
@@ -21,9 +22,6 @@
 #define VIRTIO_RNG_GET_PARENT_CLASS(obj) \
         OBJECT_GET_PARENT_CLASS(obj, TYPE_VIRTIO_RNG)
 
-/* The Virtio ID for the virtio rng device */
-#define VIRTIO_ID_RNG    4
-
 struct VirtIORNGConf {
     RngBackend *rng;
     uint64_t max_bytes;
diff --git a/include/hw/virtio/virtio-scsi.h b/include/hw/virtio/virtio-scsi.h
index c122e7ae5c..de2c739d22 100644
--- a/include/hw/virtio/virtio-scsi.h
+++ b/include/hw/virtio/virtio-scsi.h
@@ -14,6 +14,7 @@
 #ifndef _QEMU_VIRTIO_SCSI_H
 #define _QEMU_VIRTIO_SCSI_H
 
+#include "standard-headers/linux/virtio_scsi.h"
 #include "hw/virtio/virtio.h"
 #include "hw/pci/pci.h"
 #include "hw/scsi/scsi.h"
@@ -28,15 +29,6 @@
 #define VIRTIO_SCSI(obj) \
         OBJECT_CHECK(VirtIOSCSI, (obj), TYPE_VIRTIO_SCSI)
 
-
-/* The ID for virtio_scsi */
-#define VIRTIO_ID_SCSI  8
-
-/* Feature Bits */
-#define VIRTIO_SCSI_F_INOUT                    0
-#define VIRTIO_SCSI_F_HOTPLUG                  1
-#define VIRTIO_SCSI_F_CHANGE                   2
-
 #define VIRTIO_SCSI_VQ_SIZE     128
 #define VIRTIO_SCSI_CDB_SIZE    32
 #define VIRTIO_SCSI_SENSE_SIZE  96
@@ -44,108 +36,14 @@
 #define VIRTIO_SCSI_MAX_TARGET  255
 #define VIRTIO_SCSI_MAX_LUN     16383
 
-/* Response codes */
-#define VIRTIO_SCSI_S_OK                       0
-#define VIRTIO_SCSI_S_OVERRUN                  1
-#define VIRTIO_SCSI_S_ABORTED                  2
-#define VIRTIO_SCSI_S_BAD_TARGET               3
-#define VIRTIO_SCSI_S_RESET                    4
-#define VIRTIO_SCSI_S_BUSY                     5
-#define VIRTIO_SCSI_S_TRANSPORT_FAILURE        6
-#define VIRTIO_SCSI_S_TARGET_FAILURE           7
-#define VIRTIO_SCSI_S_NEXUS_FAILURE            8
-#define VIRTIO_SCSI_S_FAILURE                  9
-#define VIRTIO_SCSI_S_FUNCTION_SUCCEEDED       10
-#define VIRTIO_SCSI_S_FUNCTION_REJECTED        11
-#define VIRTIO_SCSI_S_INCORRECT_LUN            12
-
-/* Controlq type codes.  */
-#define VIRTIO_SCSI_T_TMF                      0
-#define VIRTIO_SCSI_T_AN_QUERY                 1
-#define VIRTIO_SCSI_T_AN_SUBSCRIBE             2
-
-/* Valid TMF subtypes.  */
-#define VIRTIO_SCSI_T_TMF_ABORT_TASK           0
-#define VIRTIO_SCSI_T_TMF_ABORT_TASK_SET       1
-#define VIRTIO_SCSI_T_TMF_CLEAR_ACA            2
-#define VIRTIO_SCSI_T_TMF_CLEAR_TASK_SET       3
-#define VIRTIO_SCSI_T_TMF_I_T_NEXUS_RESET      4
-#define VIRTIO_SCSI_T_TMF_LOGICAL_UNIT_RESET   5
-#define VIRTIO_SCSI_T_TMF_QUERY_TASK           6
-#define VIRTIO_SCSI_T_TMF_QUERY_TASK_SET       7
-
-/* Events.  */
-#define VIRTIO_SCSI_T_EVENTS_MISSED            0x80000000
-#define VIRTIO_SCSI_T_NO_EVENT                 0
-#define VIRTIO_SCSI_T_TRANSPORT_RESET          1
-#define VIRTIO_SCSI_T_ASYNC_NOTIFY             2
-#define VIRTIO_SCSI_T_PARAM_CHANGE             3
-
-/* Reasons for transport reset event */
-#define VIRTIO_SCSI_EVT_RESET_HARD             0
-#define VIRTIO_SCSI_EVT_RESET_RESCAN           1
-#define VIRTIO_SCSI_EVT_RESET_REMOVED          2
-
-/* SCSI command request, followed by CDB and data-out */
-typedef struct {
-    uint8_t lun[8];              /* Logical Unit Number */
-    uint64_t tag;                /* Command identifier */
-    uint8_t task_attr;           /* Task attribute */
-    uint8_t prio;
-    uint8_t crn;
-} QEMU_PACKED VirtIOSCSICmdReq;
-
-/* Response, followed by sense data and data-in */
-typedef struct {
-    uint32_t sense_len;          /* Sense data length */
-    uint32_t resid;              /* Residual bytes in data buffer */
-    uint16_t status_qualifier;   /* Status qualifier */
-    uint8_t status;              /* Command completion status */
-    uint8_t response;            /* Response values */
-} QEMU_PACKED VirtIOSCSICmdResp;
-
-/* Task Management Request */
-typedef struct {
-    uint32_t type;
-    uint32_t subtype;
-    uint8_t lun[8];
-    uint64_t tag;
-} QEMU_PACKED VirtIOSCSICtrlTMFReq;
-
-typedef struct {
-    uint8_t response;
-} QEMU_PACKED VirtIOSCSICtrlTMFResp;
-
-/* Asynchronous notification query/subscription */
-typedef struct {
-    uint32_t type;
-    uint8_t lun[8];
-    uint32_t event_requested;
-} QEMU_PACKED VirtIOSCSICtrlANReq;
-
-typedef struct {
-    uint32_t event_actual;
-    uint8_t response;
-} QEMU_PACKED VirtIOSCSICtrlANResp;
-
-typedef struct {
-    uint32_t event;
-    uint8_t lun[8];
-    uint32_t reason;
-} QEMU_PACKED VirtIOSCSIEvent;
-
-typedef struct {
-    uint32_t num_queues;
-    uint32_t seg_max;
-    uint32_t max_sectors;
-    uint32_t cmd_per_lun;
-    uint32_t event_info_size;
-    uint32_t sense_size;
-    uint32_t cdb_size;
-    uint16_t max_channel;
-    uint16_t max_target;
-    uint32_t max_lun;
-} QEMU_PACKED VirtIOSCSIConfig;
+typedef struct virtio_scsi_cmd_req VirtIOSCSICmdReq;
+typedef struct virtio_scsi_cmd_resp VirtIOSCSICmdResp;
+typedef struct virtio_scsi_ctrl_tmf_req VirtIOSCSICtrlTMFReq;
+typedef struct virtio_scsi_ctrl_tmf_resp VirtIOSCSICtrlTMFResp;
+typedef struct virtio_scsi_ctrl_an_req VirtIOSCSICtrlANReq;
+typedef struct virtio_scsi_ctrl_an_resp VirtIOSCSICtrlANResp;
+typedef struct virtio_scsi_event VirtIOSCSIEvent;
+typedef struct virtio_scsi_config VirtIOSCSIConfig;
 
 struct VirtIOSCSIConf {
     uint32_t num_queues;
diff --git a/include/hw/virtio/virtio-serial.h b/include/hw/virtio/virtio-serial.h
index 11af978a96..ccf8459829 100644
--- a/include/hw/virtio/virtio-serial.h
+++ b/include/hw/virtio/virtio-serial.h
@@ -15,53 +15,15 @@
 #ifndef _QEMU_VIRTIO_SERIAL_H
 #define _QEMU_VIRTIO_SERIAL_H
 
+#include "standard-headers/linux/virtio_console.h"
 #include "hw/qdev.h"
 #include "hw/virtio/virtio.h"
 
-/* == Interface shared between the guest kernel and qemu == */
-
-/* The Virtio ID for virtio console / serial ports */
-#define VIRTIO_ID_CONSOLE		3
-
-/* Features supported */
-#define VIRTIO_CONSOLE_F_MULTIPORT	1
-
-#define VIRTIO_CONSOLE_BAD_ID           (~(uint32_t)0)
-
-struct virtio_console_config {
-    /*
-     * These two fields are used by VIRTIO_CONSOLE_F_SIZE which
-     * isn't implemented here yet
-     */
-    uint16_t cols;
-    uint16_t rows;
-
-    uint32_t max_nr_ports;
-} QEMU_PACKED;
-
-struct virtio_console_control {
-    uint32_t id;		/* Port number */
-    uint16_t event;		/* The kind of control event (see below) */
-    uint16_t value;		/* Extra information for the key */
-};
-
 struct virtio_serial_conf {
     /* Max. number of ports we can have for a virtio-serial device */
     uint32_t max_virtserial_ports;
 };
 
-/* Some events for the internal messages (control packets) */
-#define VIRTIO_CONSOLE_DEVICE_READY	0
-#define VIRTIO_CONSOLE_PORT_ADD		1
-#define VIRTIO_CONSOLE_PORT_REMOVE	2
-#define VIRTIO_CONSOLE_PORT_READY	3
-#define VIRTIO_CONSOLE_CONSOLE_PORT	4
-#define VIRTIO_CONSOLE_RESIZE		5
-#define VIRTIO_CONSOLE_PORT_OPEN	6
-#define VIRTIO_CONSOLE_PORT_NAME	7
-
-/* == In-qemu interface == */
-
 #define TYPE_VIRTIO_SERIAL_PORT "virtio-serial-port"
 #define VIRTIO_SERIAL_PORT(obj) \
      OBJECT_CHECK(VirtIOSerialPort, (obj), TYPE_VIRTIO_SERIAL_PORT)
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index f24997d218..d95f8b6d50 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -19,56 +19,12 @@
 #include "hw/qdev.h"
 #include "sysemu/sysemu.h"
 #include "qemu/event_notifier.h"
-#ifdef CONFIG_VIRTFS
-#include "hw/virtio/virtio-9p.h"
-#endif
+#include "standard-headers/linux/virtio_config.h"
+#include "standard-headers/linux/virtio_ring.h"
 
-/* from Linux's linux/virtio_config.h */
-
-/* Status byte for guest to report progress, and synchronize features. */
-/* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */
-#define VIRTIO_CONFIG_S_ACKNOWLEDGE     1
-/* We have found a driver for the device. */
-#define VIRTIO_CONFIG_S_DRIVER          2
-/* Driver has used its parts of the config, and is happy */
-#define VIRTIO_CONFIG_S_DRIVER_OK       4
-/* We've given up on this device. */
-#define VIRTIO_CONFIG_S_FAILED          0x80
-
-/* Some virtio feature bits (currently bits 28 through 31) are reserved for the
- * transport being used (eg. virtio_ring), the rest are per-device feature bits. */
-#define VIRTIO_TRANSPORT_F_START        28
-#define VIRTIO_TRANSPORT_F_END          32
-
-/* We notify when the ring is completely used, even if the guest is suppressing
- * callbacks */
-#define VIRTIO_F_NOTIFY_ON_EMPTY        24
-/* Can the device handle any descriptor layout? */
-#define VIRTIO_F_ANY_LAYOUT             27
-/* We support indirect buffer descriptors */
-#define VIRTIO_RING_F_INDIRECT_DESC     28
-/* The Guest publishes the used index for which it expects an interrupt
- * at the end of the avail ring. Host should ignore the avail->flags field. */
-/* The Host publishes the avail index for which it expects a kick
- * at the end of the used ring. Guest should ignore the used->flags field. */
-#define VIRTIO_RING_F_EVENT_IDX         29
 /* A guest should never accept this.  It implies negotiation is broken. */
 #define VIRTIO_F_BAD_FEATURE		30
 
-/* from Linux's linux/virtio_ring.h */
-
-/* This marks a buffer as continuing via the next field. */
-#define VRING_DESC_F_NEXT       1
-/* This marks a buffer as write-only (otherwise read-only). */
-#define VRING_DESC_F_WRITE      2
-/* This means the buffer contains a list of buffer descriptors. */
-#define VRING_DESC_F_INDIRECT  4
-
-/* This means don't notify other side when buffer added. */
-#define VRING_USED_F_NO_NOTIFY  1
-/* This means don't interrupt guest when buffer consumed. */
-#define VRING_AVAIL_F_NO_INTERRUPT      1
-
 struct VirtQueue;
 
 static inline hwaddr vring_align(hwaddr addr,
@@ -263,6 +219,29 @@ void virtio_queue_set_host_notifier_fd_handler(VirtQueue *vq, bool assign,
 void virtio_queue_notify_vq(VirtQueue *vq);
 void virtio_irq(VirtQueue *vq);
 
+static inline void virtio_add_feature(uint32_t *features, unsigned int fbit)
+{
+    assert(fbit < 32);
+    *features |= (1 << fbit);
+}
+
+static inline void virtio_clear_feature(uint32_t *features, unsigned int fbit)
+{
+    assert(fbit < 32);
+    *features &= ~(1 << fbit);
+}
+
+static inline bool __virtio_has_feature(uint32_t features, unsigned int fbit)
+{
+    assert(fbit < 32);
+    return !!(features & (1 << fbit));
+}
+
+static inline bool virtio_has_feature(VirtIODevice *vdev, unsigned int fbit)
+{
+    return __virtio_has_feature(vdev->guest_features, fbit);
+}
+
 static inline bool virtio_is_big_endian(VirtIODevice *vdev)
 {
     assert(vdev->device_endian != VIRTIO_DEVICE_ENDIAN_UNKNOWN);
diff --git a/include/hw/virtio/virtio_ring.h b/include/hw/virtio/virtio_ring.h
deleted file mode 100644
index 0b42e6eae5..0000000000
--- a/include/hw/virtio/virtio_ring.h
+++ /dev/null
@@ -1,167 +0,0 @@
-#ifndef _LINUX_VIRTIO_RING_H
-#define _LINUX_VIRTIO_RING_H
-/*
- * This file is copied from /usr/include/linux while converting __uNN types
- * to uXX_t, __inline__ to inline, and tab to spaces.
- * */
-
-/* An interface for efficient virtio implementation, currently for use by KVM
- * and lguest, but hopefully others soon.  Do NOT change this since it will
- * break existing servers and clients.
- *
- * This header is BSD licensed so anyone can use the definitions to implement
- * compatible drivers/servers.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- *    notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- *    notice, this list of conditions and the following disclaimer in the
- *    documentation and/or other materials provided with the distribution.
- * 3. Neither the name of IBM nor the names of its contributors
- *    may be used to endorse or promote products derived from this software
- *    without specific prior written permission.
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED.  IN NO EVENT SHALL IBM OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * Copyright Rusty Russell IBM Corporation 2007. */
-
-/* This marks a buffer as continuing via the next field. */
-#define VRING_DESC_F_NEXT   1
-/* This marks a buffer as write-only (otherwise read-only). */
-#define VRING_DESC_F_WRITE  2
-/* This means the buffer contains a list of buffer descriptors. */
-#define VRING_DESC_F_INDIRECT   4
-
-/* The Host uses this in used->flags to advise the Guest: don't kick me when
- * you add a buffer.  It's unreliable, so it's simply an optimization.  Guest
- * will still kick if it's out of buffers. */
-#define VRING_USED_F_NO_NOTIFY  1
-/* The Guest uses this in avail->flags to advise the Host: don't interrupt me
- * when you consume a buffer.  It's unreliable, so it's simply an
- * optimization.  */
-#define VRING_AVAIL_F_NO_INTERRUPT  1
-
-/* We support indirect buffer descriptors */
-#define VIRTIO_RING_F_INDIRECT_DESC 28
-
-/* The Guest publishes the used index for which it expects an interrupt
- * at the end of the avail ring. Host should ignore the avail->flags field. */
-/* The Host publishes the avail index for which it expects a kick
- * at the end of the used ring. Guest should ignore the used->flags field. */
-#define VIRTIO_RING_F_EVENT_IDX     29
-
-/* Virtio ring descriptors: 16 bytes.  These can chain together via "next". */
-struct vring_desc {
-    /* Address (guest-physical). */
-    uint64_t addr;
-    /* Length. */
-    uint32_t len;
-    /* The flags as indicated above. */
-    uint16_t flags;
-    /* We chain unused descriptors via this, too */
-    uint16_t next;
-};
-
-struct vring_avail {
-    uint16_t flags;
-    uint16_t idx;
-    uint16_t ring[];
-};
-
-/* u32 is used here for ids for padding reasons. */
-struct vring_used_elem {
-    /* Index of start of used descriptor chain. */
-    uint32_t id;
-    /* Total length of the descriptor chain which was used (written to) */
-    uint32_t len;
-};
-
-struct vring_used {
-    uint16_t flags;
-    uint16_t idx;
-    struct vring_used_elem ring[];
-};
-
-struct vring {
-    unsigned int num;
-
-    struct vring_desc *desc;
-
-    struct vring_avail *avail;
-
-    struct vring_used *used;
-};
-
-/* The standard layout for the ring is a continuous chunk of memory which looks
- * like this.  We assume num is a power of 2.
- *
- * struct vring
- * {
- *  // The actual descriptors (16 bytes each)
- *  struct vring_desc desc[num];
- *
- *  // A ring of available descriptor heads with free-running index.
- *  uint16_t avail_flags;
- *  uint16_t avail_idx;
- *  uint16_t available[num];
- *  uint16_t used_event_idx;
- *
- *  // Padding to the next align boundary.
- *  char pad[];
- *
- *  // A ring of used descriptor heads with free-running index.
- *  uint16_t used_flags;
- *  uint16_t used_idx;
- *  struct vring_used_elem used[num];
- *  uint16_t avail_event_idx;
- * };
- */
-/* We publish the used event index at the end of the available ring, and vice
- * versa. They are at the end for backwards compatibility. */
-#define vring_used_event(vr) ((vr)->avail->ring[(vr)->num])
-#define vring_avail_event(vr) (*(uint16_t *)&(vr)->used->ring[(vr)->num])
-
-static inline void vring_init(struct vring *vr, unsigned int num, void *p,
-                  unsigned long align)
-{
-    vr->num = num;
-    vr->desc = p;
-    vr->avail = p + num*sizeof(struct vring_desc);
-    vr->used = (void *)(((uintptr_t)&vr->avail->ring[num] + sizeof(uint16_t)
-        + align - 1) & ~(align - 1));
-}
-
-static inline unsigned vring_size(unsigned int num, unsigned long align)
-{
-    return ((sizeof(struct vring_desc) * num + sizeof(uint16_t) * (3 + num)
-         + align - 1) & ~(align - 1))
-        + sizeof(uint16_t) * 3 + sizeof(struct vring_used_elem) * num;
-}
-
-/* The following is used with USED_EVENT_IDX and AVAIL_EVENT_IDX */
-/* Assuming a given event_idx value from the other size, if
- * we have just incremented index from old to new_idx,
- * should we trigger an event? */
-static inline int vring_need_event(uint16_t event_idx, uint16_t new_idx, uint16_t old)
-{
-    /* Note: Xen has similar logic for notification hold-off
-     * in include/xen/interface/io/ring.h with req_event and req_prod
-     * corresponding to event_idx + 1 and new_idx respectively.
-     * Note also that req_event and req_prod in Xen start at 1,
-     * event indexes in virtio start at 0. */
-    return (uint16_t)(new_idx - event_idx - 1) < (uint16_t)(new_idx - old);
-}
-
-#endif /* _LINUX_VIRTIO_RING_H */