Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted

Pull networking updates from Jakub Kicinski:
 "Core:

   - Add dedicated kmem_cache for typical/small skb->head, avoid having
     to access struct page at kfree time, and improve memory use.

   - Introduce sysctl to set default RPS configuration for new netdevs.

   - Define Netlink protocol specification format which can be used to
     describe messages used by each family and auto-generate parsers.
     Add tools for generating kernel data structures and uAPI headers.

   - Expose all net/core sysctls inside netns.

   - Remove 4s sleep in netpoll if carrier is instantly detected on
     boot.

   - Add configurable limit of MDB entries per port, and port-vlan.

   - Continue populating drop reasons throughout the stack.

   - Retire a handful of legacy Qdiscs and classifiers.

  Protocols:

   - Support IPv4 big TCP (TSO frames larger than 64kB).

   - Add IP_LOCAL_PORT_RANGE socket option, to control local port range
     on socket by socket basis.

   - Track and report in procfs number of MPTCP sockets used.

   - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path
     manager.

   - IPv6: don't check net.ipv6.route.max_size and rely on garbage
     collection to free memory (similarly to IPv4).

   - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986).

   - ICMP: add per-rate limit counters.

   - Add support for user scanning requests in ieee802154.

   - Remove static WEP support.

   - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate
     reporting.

   - WiFi 7 EHT channel puncturing support (client & AP).

  BPF:

   - Add a rbtree data structure following the "next-gen data structure"
     precedent set by recently added linked list, that is, by using
     kfunc + kptr instead of adding a new BPF map type.

   - Expose XDP hints via kfuncs with initial support for RX hash and
     timestamp metadata.

   - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to
     better support decap on GRE tunnel devices not operating in collect
     metadata.

   - Improve x86 JIT's codegen for PROBE_MEM runtime error checks.

   - Remove the need for trace_printk_lock for bpf_trace_printk and
     bpf_trace_vprintk helpers.

   - Extend libbpf's bpf_tracing.h support for tracing arguments of
     kprobes/uprobes and syscall as a special case.

   - Significantly reduce the search time for module symbols by
     livepatch and BPF.

   - Enable cpumasks to be used as kptrs, which is useful for tracing
     programs tracking which tasks end up running on which CPUs in
     different time intervals.

   - Add support for BPF trampoline on s390x and riscv64.

   - Add capability to export the XDP features supported by the NIC.

   - Add __bpf_kfunc tag for marking kernel functions as kfuncs.

   - Add cgroup.memory=nobpf kernel parameter option to disable BPF
     memory accounting for container environments.

  Netfilter:

   - Remove the CLUSTERIP target. It has been marked as obsolete for
     years, and we still have WARN splats wrt races of the out-of-band
     /proc interface installed by this target.

   - Add 'destroy' commands to nf_tables. They are identical to the
     existing 'delete' commands, but do not return an error if the
     referenced object (set, chain, rule...) did not exist.

  Driver API:

   - Improve cpumask_local_spread() locality to help NICs set the right
     IRQ affinity on AMD platforms.

   - Separate C22 and C45 MDIO bus transactions more clearly.

   - Introduce new DCB table to control DSCP rewrite on egress.

   - Support configuration of Physical Layer Collision Avoidance (PLCA)
     Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of
     shared medium Ethernet.

   - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing
     preemption of low priority frames by high priority frames.

   - Add support for controlling MACSec offload using netlink SET.

   - Rework devlink instance refcounts to allow registration and
     de-registration under the instance lock. Split the code into
     multiple files, drop some of the unnecessarily granular locks and
     factor out common parts of netlink operation handling.

   - Add TX frame aggregation parameters (for USB drivers).

   - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning
     messages with notifications for debug.

   - Allow offloading of UDP NEW connections via act_ct.

   - Add support for per action HW stats in TC.

   - Support hardware miss to TC action (continue processing in SW from
     a specific point in the action chain).

   - Warn if old Wireless Extension user space interface is used with
     modern cfg80211/mac80211 drivers. Do not support Wireless
     Extensions for Wi-Fi 7 devices at all. Everyone should switch to
     using nl80211 interface instead.

   - Improve the CAN bit timing configuration. Use extack to return
     error messages directly to user space, update the SJW handling,
     including the definition of a new default value that will benefit
     CAN-FD controllers, by increasing their oscillator tolerance.

  New hardware / drivers:

   - Ethernet:
      - nVidia BlueField-3 support (control traffic driver)
      - Ethernet support for imx93 SoCs
      - Motorcomm yt8531 gigabit Ethernet PHY
      - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA)
      - Microchip LAN8841 PHY (incl. cable diagnostics and PTP)
      - Amlogic gxl MDIO mux

   - WiFi:
      - RealTek RTL8188EU (rtl8xxxu)
      - Qualcomm Wi-Fi 7 devices (ath12k)

   - CAN:
      - Renesas R-Car V4H

  Drivers:

   - Bluetooth:
      - Set Per Platform Antenna Gain (PPAG) for Intel controllers.

   - Ethernet NICs:
      - Intel (1G, igc):
         - support TSN / Qbv / packet scheduling features of i226 model
      - Intel (100G, ice):
         - use GNSS subsystem instead of TTY
         - multi-buffer XDP support
         - extend support for GPIO pins to E823 devices
      - nVidia/Mellanox:
         - update the shared buffer configuration on PFC commands
         - implement PTP adjphase function for HW offset control
         - TC support for Geneve and GRE with VF tunnel offload
         - more efficient crypto key management method
         - multi-port eswitch support
      - Netronome/Corigine:
         - add DCB IEEE support
         - support IPsec offloading for NFP3800
      - Freescale/NXP (enetc):
         - support XDP_REDIRECT for XDP non-linear buffers
         - improve reconfig, avoid link flap and waiting for idle
         - support MAC Merge layer
      - Other NICs:
         - sfc/ef100: add basic devlink support for ef100
         - ionic: rx_push mode operation (writing descriptors via MMIO)
         - bnxt: use the auxiliary bus abstraction for RDMA
         - r8169: disable ASPM and reset bus in case of tx timeout
         - cpsw: support QSGMII mode for J721e CPSW9G
         - cpts: support pulse-per-second output
         - ngbe: add an mdio bus driver
         - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing
         - r8152: handle devices with FW with NCM support
         - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation
         - virtio-net: support multi buffer XDP
         - virtio/vsock: replace virtio_vsock_pkt with sk_buff
         - tsnep: XDP support

   - Ethernet high-speed switches:
      - nVidia/Mellanox (mlxsw):
         - add support for latency TLV (in FW control messages)
      - Microchip (sparx5):
         - separate explicit and implicit traffic forwarding rules, make
           the implicit rules always active
         - add support for egress DSCP rewrite
         - IS0 VCAP support (Ingress Classification)
         - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS
           etc.)
         - ES2 VCAP support (Egress Access Control)
         - support for Per-Stream Filtering and Policing (802.1Q,
           8.6.5.1)

   - Ethernet embedded switches:
      - Marvell (mv88e6xxx):
         - add MAB (port auth) offload support
         - enable PTP receive for mv88e6390
      - NXP (ocelot):
         - support MAC Merge layer
         - support for the the vsc7512 internal copper phys
      - Microchip:
         - lan9303: convert to PHYLINK
         - lan966x: support TC flower filter statistics
         - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x
         - lan937x: support Credit Based Shaper configuration
         - ksz9477: support Energy Efficient Ethernet
      - other:
         - qca8k: convert to regmap read/write API, use bulk operations
         - rswitch: Improve TX timestamp accuracy

   - Intel WiFi (iwlwifi):
      - EHT (Wi-Fi 7) rate reporting
      - STEP equalizer support: transfer some STEP (connection to radio
        on platforms with integrated wifi) related parameters from the
        BIOS to the firmware.

   - Qualcomm 802.11ax WiFi (ath11k):
      - IPQ5018 support
      - Fine Timing Measurement (FTM) responder role support
      - channel 177 support

   - MediaTek WiFi (mt76):
      - per-PHY LED support
      - mt7996: EHT (Wi-Fi 7) support
      - Wireless Ethernet Dispatch (WED) reset support
      - switch to using page pool allocator

   - RealTek WiFi (rtw89):
      - support new version of Bluetooth co-existance

   - Mobile:
      - rmnet: support TX aggregation"

* tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits)
  page_pool: add a comment explaining the fragment counter usage
  net: ethtool: fix __ethtool_dev_mm_supported() implementation
  ethtool: pse-pd: Fix double word in comments
  xsk: add linux/vmalloc.h to xsk.c
  sefltests: netdevsim: wait for devlink instance after netns removal
  selftest: fib_tests: Always cleanup before exit
  net/mlx5e: Align IPsec ASO result memory to be as required by hardware
  net/mlx5e: TC, Set CT miss to the specific ct action instance
  net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG
  net/mlx5: Refactor tc miss handling to a single function
  net/mlx5: Kconfig: Make tc offload depend on tc skb extension
  net/sched: flower: Support hardware miss to tc action
  net/sched: flower: Move filter handle initialization earlier
  net/sched: cls_api: Support hardware miss to tc action
  net/sched: Rename user cookie and act cookie
  sfc: fix builds without CONFIG_RTC_LIB
  sfc: clean up some inconsistent indentings
  net/mlx4_en: Introduce flexible array to silence overflow warning
  net: lan966x: Fix possible deadlock inside PTP
  net/ulp: Remove redundant ->clone() test in inet_clone_ulp().
  ...

1 files changed, 383 insertions, 0 deletions

diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h
new file mode 100644
index 000000000..7d8ed8d8d
--- /dev/null
+++ b/drivers/net/netdevsim/netdevsim.h
@@ -0,0 +1,383 @@
+/*
+ * Copyright (C) 2017 Netronome Systems, Inc.
+ *
+ * This software is licensed under the GNU General License Version 2,
+ * June 1991 as shown in the file COPYING in the top-level directory of this
+ * source tree.
+ *
+ * THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS"
+ * WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING,
+ * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE
+ * OF THE PROGRAM IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME
+ * THE COST OF ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
+ */
+
+#include <linux/debugfs.h>
+#include <linux/device.h>
+#include <linux/ethtool.h>
+#include <linux/kernel.h>
+#include <linux/list.h>
+#include <linux/netdevice.h>
+#include <linux/u64_stats_sync.h>
+#include <net/devlink.h>
+#include <net/udp_tunnel.h>
+#include <net/xdp.h>
+
+#define DRV_NAME	"netdevsim"
+
+#define NSIM_XDP_MAX_MTU	4000
+
+#define NSIM_EA(extack, msg)	NL_SET_ERR_MSG_MOD((extack), msg)
+
+#define NSIM_IPSEC_MAX_SA_COUNT		33
+#define NSIM_IPSEC_VALID		BIT(31)
+#define NSIM_UDP_TUNNEL_N_PORTS		4
+
+struct nsim_sa {
+	struct xfrm_state *xs;
+	__be32 ipaddr[4];
+	u32 key[4];
+	u32 salt;
+	bool used;
+	bool crypt;
+	bool rx;
+};
+
+struct nsim_ipsec {
+	struct nsim_sa sa[NSIM_IPSEC_MAX_SA_COUNT];
+	struct dentry *pfile;
+	u32 count;
+	u32 tx;
+	u32 ok;
+};
+
+struct nsim_ethtool_pauseparam {
+	bool rx;
+	bool tx;
+	bool report_stats_rx;
+	bool report_stats_tx;
+};
+
+struct nsim_ethtool {
+	u32 get_err;
+	u32 set_err;
+	u32 channels;
+	struct nsim_ethtool_pauseparam pauseparam;
+	struct ethtool_coalesce coalesce;
+	struct ethtool_ringparam ring;
+	struct ethtool_fecparam fec;
+};
+
+struct netdevsim {
+	struct net_device *netdev;
+	struct nsim_dev *nsim_dev;
+	struct nsim_dev_port *nsim_dev_port;
+
+	u64 tx_packets;
+	u64 tx_bytes;
+	struct u64_stats_sync syncp;
+
+	struct nsim_bus_dev *nsim_bus_dev;
+
+	struct bpf_prog	*bpf_offloaded;
+	u32 bpf_offloaded_id;
+
+	struct xdp_attachment_info xdp;
+	struct xdp_attachment_info xdp_hw;
+
+	bool bpf_tc_accept;
+	bool bpf_tc_non_bound_accept;
+	bool bpf_xdpdrv_accept;
+	bool bpf_xdpoffload_accept;
+
+	bool bpf_map_accept;
+	struct nsim_ipsec ipsec;
+	struct {
+		u32 inject_error;
+		u32 sleep;
+		u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
+		u32 (*ports)[NSIM_UDP_TUNNEL_N_PORTS];
+		struct debugfs_u32_array dfs_ports[2];
+	} udp_ports;
+
+	struct nsim_ethtool ethtool;
+};
+
+struct netdevsim *
+nsim_create(struct nsim_dev *nsim_dev, struct nsim_dev_port *nsim_dev_port);
+void nsim_destroy(struct netdevsim *ns);
+
+void nsim_ethtool_init(struct netdevsim *ns);
+
+void nsim_udp_tunnels_debugfs_create(struct nsim_dev *nsim_dev);
+int nsim_udp_tunnels_info_create(struct nsim_dev *nsim_dev,
+				 struct net_device *dev);
+void nsim_udp_tunnels_info_destroy(struct net_device *dev);
+
+#ifdef CONFIG_BPF_SYSCALL
+int nsim_bpf_dev_init(struct nsim_dev *nsim_dev);
+void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev);
+int nsim_bpf_init(struct netdevsim *ns);
+void nsim_bpf_uninit(struct netdevsim *ns);
+int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf);
+int nsim_bpf_disable_tc(struct netdevsim *ns);
+int nsim_bpf_setup_tc_block_cb(enum tc_setup_type type,
+			       void *type_data, void *cb_priv);
+#else
+
+static inline int nsim_bpf_dev_init(struct nsim_dev *nsim_dev)
+{
+	return 0;
+}
+
+static inline void nsim_bpf_dev_exit(struct nsim_dev *nsim_dev)
+{
+}
+static inline int nsim_bpf_init(struct netdevsim *ns)
+{
+	return 0;
+}
+
+static inline void nsim_bpf_uninit(struct netdevsim *ns)
+{
+}
+
+static inline int nsim_bpf(struct net_device *dev, struct netdev_bpf *bpf)
+{
+	return -EOPNOTSUPP;
+}
+
+static inline int nsim_bpf_disable_tc(struct netdevsim *ns)
+{
+	return 0;
+}
+
+static inline int
+nsim_bpf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
+			   void *cb_priv)
+{
+	return -EOPNOTSUPP;
+}
+#endif
+
+enum nsim_resource_id {
+	NSIM_RESOURCE_NONE,   /* DEVLINK_RESOURCE_ID_PARENT_TOP */
+	NSIM_RESOURCE_IPV4,
+	NSIM_RESOURCE_IPV4_FIB,
+	NSIM_RESOURCE_IPV4_FIB_RULES,
+	NSIM_RESOURCE_IPV6,
+	NSIM_RESOURCE_IPV6_FIB,
+	NSIM_RESOURCE_IPV6_FIB_RULES,
+	NSIM_RESOURCE_NEXTHOPS,
+};
+
+struct nsim_dev_health {
+	struct devlink_health_reporter *empty_reporter;
+	struct devlink_health_reporter *dummy_reporter;
+	struct dentry *ddir;
+	char *recovered_break_msg;
+	u32 binary_len;
+	bool fail_recover;
+};
+
+int nsim_dev_health_init(struct nsim_dev *nsim_dev, struct devlink *devlink);
+void nsim_dev_health_exit(struct nsim_dev *nsim_dev);
+
+struct nsim_dev_hwstats_netdev {
+	struct list_head list;
+	struct net_device *netdev;
+	struct rtnl_hw_stats64 stats;
+	bool enabled;
+	bool fail_enable;
+};
+
+struct nsim_dev_hwstats {
+	struct dentry *ddir;
+	struct dentry *l3_ddir;
+
+	struct mutex hwsdev_list_lock; /* protects hwsdev list(s) */
+	struct list_head l3_list;
+
+	struct notifier_block netdevice_nb;
+	struct delayed_work traffic_dw;
+};
+
+int nsim_dev_hwstats_init(struct nsim_dev *nsim_dev);
+void nsim_dev_hwstats_exit(struct nsim_dev *nsim_dev);
+
+#if IS_ENABLED(CONFIG_PSAMPLE)
+int nsim_dev_psample_init(struct nsim_dev *nsim_dev);
+void nsim_dev_psample_exit(struct nsim_dev *nsim_dev);
+#else
+static inline int nsim_dev_psample_init(struct nsim_dev *nsim_dev)
+{
+	return 0;
+}
+
+static inline void nsim_dev_psample_exit(struct nsim_dev *nsim_dev)
+{
+}
+#endif
+
+enum nsim_dev_port_type {
+	NSIM_DEV_PORT_TYPE_PF,
+	NSIM_DEV_PORT_TYPE_VF,
+};
+
+#define NSIM_DEV_VF_PORT_INDEX_BASE 128
+#define NSIM_DEV_VF_PORT_INDEX_MAX UINT_MAX
+
+struct nsim_dev_port {
+	struct list_head list;
+	struct devlink_port devlink_port;
+	unsigned int port_index;
+	enum nsim_dev_port_type port_type;
+	struct dentry *ddir;
+	struct dentry *rate_parent;
+	char *parent_name;
+	struct netdevsim *ns;
+};
+
+struct nsim_vf_config {
+	int link_state;
+	u16 min_tx_rate;
+	u16 max_tx_rate;
+	u16 vlan;
+	__be16 vlan_proto;
+	u16 qos;
+	u8 vf_mac[ETH_ALEN];
+	bool spoofchk_enabled;
+	bool trusted;
+	bool rss_query_enabled;
+};
+
+struct nsim_dev {
+	struct nsim_bus_dev *nsim_bus_dev;
+	struct nsim_fib_data *fib_data;
+	struct nsim_trap_data *trap_data;
+	struct dentry *ddir;
+	struct dentry *ports_ddir;
+	struct dentry *take_snapshot;
+	struct dentry *nodes_ddir;
+
+	struct nsim_vf_config *vfconfigs;
+
+	struct bpf_offload_dev *bpf_dev;
+	bool bpf_bind_accept;
+	bool bpf_bind_verifier_accept;
+	u32 bpf_bind_verifier_delay;
+	struct dentry *ddir_bpf_bound_progs;
+	u32 prog_id_gen;
+	struct list_head bpf_bound_progs;
+	struct list_head bpf_bound_maps;
+	struct netdev_phys_item_id switch_id;
+	struct list_head port_list;
+	bool fw_update_status;
+	u32 fw_update_overwrite_mask;
+	u32 max_macs;
+	bool test1;
+	bool dont_allow_reload;
+	bool fail_reload;
+	struct devlink_region *dummy_region;
+	struct nsim_dev_health health;
+	struct nsim_dev_hwstats hwstats;
+	struct flow_action_cookie *fa_cookie;
+	spinlock_t fa_cookie_lock; /* protects fa_cookie */
+	bool fail_trap_group_set;
+	bool fail_trap_policer_set;
+	bool fail_trap_policer_counter_get;
+	bool fail_trap_drop_counter_get;
+	struct {
+		struct udp_tunnel_nic_shared utn_shared;
+		u32 __ports[2][NSIM_UDP_TUNNEL_N_PORTS];
+		bool sync_all;
+		bool open_only;
+		bool ipv4_only;
+		bool shared;
+		bool static_iana_vxlan;
+		u32 sleep;
+	} udp_ports;
+	struct nsim_dev_psample *psample;
+	u16 esw_mode;
+};
+
+static inline bool nsim_esw_mode_is_legacy(struct nsim_dev *nsim_dev)
+{
+	return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_LEGACY;
+}
+
+static inline bool nsim_esw_mode_is_switchdev(struct nsim_dev *nsim_dev)
+{
+	return nsim_dev->esw_mode == DEVLINK_ESWITCH_MODE_SWITCHDEV;
+}
+
+static inline struct net *nsim_dev_net(struct nsim_dev *nsim_dev)
+{
+	return devlink_net(priv_to_devlink(nsim_dev));
+}
+
+int nsim_dev_init(void);
+void nsim_dev_exit(void);
+int nsim_drv_probe(struct nsim_bus_dev *nsim_bus_dev);
+void nsim_drv_remove(struct nsim_bus_dev *nsim_bus_dev);
+int nsim_drv_port_add(struct nsim_bus_dev *nsim_bus_dev,
+		      enum nsim_dev_port_type type,
+		      unsigned int port_index);
+int nsim_drv_port_del(struct nsim_bus_dev *nsim_bus_dev,
+		      enum nsim_dev_port_type type,
+		      unsigned int port_index);
+int nsim_drv_configure_vfs(struct nsim_bus_dev *nsim_bus_dev,
+			   unsigned int num_vfs);
+
+unsigned int nsim_dev_get_vfs(struct nsim_dev *nsim_dev);
+
+struct nsim_fib_data *nsim_fib_create(struct devlink *devlink,
+				      struct netlink_ext_ack *extack);
+void nsim_fib_destroy(struct devlink *devlink, struct nsim_fib_data *fib_data);
+u64 nsim_fib_get_val(struct nsim_fib_data *fib_data,
+		     enum nsim_resource_id res_id, bool max);
+
+static inline bool nsim_dev_port_is_pf(struct nsim_dev_port *nsim_dev_port)
+{
+	return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_PF;
+}
+
+static inline bool nsim_dev_port_is_vf(struct nsim_dev_port *nsim_dev_port)
+{
+	return nsim_dev_port->port_type == NSIM_DEV_PORT_TYPE_VF;
+}
+#if IS_ENABLED(CONFIG_XFRM_OFFLOAD)
+void nsim_ipsec_init(struct netdevsim *ns);
+void nsim_ipsec_teardown(struct netdevsim *ns);
+bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb);
+#else
+static inline void nsim_ipsec_init(struct netdevsim *ns)
+{
+}
+
+static inline void nsim_ipsec_teardown(struct netdevsim *ns)
+{
+}
+
+static inline bool nsim_ipsec_tx(struct netdevsim *ns, struct sk_buff *skb)
+{
+	return true;
+}
+#endif
+
+struct nsim_bus_dev {
+	struct device dev;
+	struct list_head list;
+	unsigned int port_count;
+	unsigned int num_queues; /* Number of queues for each port on this bus */
+	struct net *initial_net; /* Purpose of this is to carry net pointer
+				  * during the probe time only.
+				  */
+	unsigned int max_vfs;
+	unsigned int num_vfs;
+	bool init;
+};
+
+int nsim_bus_init(void);
+void nsim_bus_exit(void);