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, 605 insertions, 0 deletions

diff --git a/arch/x86/kernel/kexec-bzimage64.c b/arch/x86/kernel/kexec-bzimage64.c
new file mode 100644
index 000000000..6b58610a1
--- /dev/null
+++ b/arch/x86/kernel/kexec-bzimage64.c
@@ -0,0 +1,605 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Kexec bzImage loader
+ *
+ * Copyright (C) 2014 Red Hat Inc.
+ * Authors:
+ *      Vivek Goyal <vgoyal@redhat.com>
+ */
+
+#define pr_fmt(fmt)	"kexec-bzImage64: " fmt
+
+#include <linux/string.h>
+#include <linux/printk.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/kexec.h>
+#include <linux/kernel.h>
+#include <linux/mm.h>
+#include <linux/efi.h>
+#include <linux/random.h>
+
+#include <asm/bootparam.h>
+#include <asm/setup.h>
+#include <asm/crash.h>
+#include <asm/efi.h>
+#include <asm/e820/api.h>
+#include <asm/kexec-bzimage64.h>
+
+#define MAX_ELFCOREHDR_STR_LEN	30	/* elfcorehdr=0x<64bit-value> */
+
+/*
+ * Defines lowest physical address for various segments. Not sure where
+ * exactly these limits came from. Current bzimage64 loader in kexec-tools
+ * uses these so I am retaining it. It can be changed over time as we gain
+ * more insight.
+ */
+#define MIN_PURGATORY_ADDR	0x3000
+#define MIN_BOOTPARAM_ADDR	0x3000
+#define MIN_KERNEL_LOAD_ADDR	0x100000
+#define MIN_INITRD_LOAD_ADDR	0x1000000
+
+/*
+ * This is a place holder for all boot loader specific data structure which
+ * gets allocated in one call but gets freed much later during cleanup
+ * time. Right now there is only one field but it can grow as need be.
+ */
+struct bzimage64_data {
+	/*
+	 * Temporary buffer to hold bootparams buffer. This should be
+	 * freed once the bootparam segment has been loaded.
+	 */
+	void *bootparams_buf;
+};
+
+static int setup_initrd(struct boot_params *params,
+		unsigned long initrd_load_addr, unsigned long initrd_len)
+{
+	params->hdr.ramdisk_image = initrd_load_addr & 0xffffffffUL;
+	params->hdr.ramdisk_size = initrd_len & 0xffffffffUL;
+
+	params->ext_ramdisk_image = initrd_load_addr >> 32;
+	params->ext_ramdisk_size = initrd_len >> 32;
+
+	return 0;
+}
+
+static int setup_cmdline(struct kimage *image, struct boot_params *params,
+			 unsigned long bootparams_load_addr,
+			 unsigned long cmdline_offset, char *cmdline,
+			 unsigned long cmdline_len)
+{
+	char *cmdline_ptr = ((char *)params) + cmdline_offset;
+	unsigned long cmdline_ptr_phys, len = 0;
+	uint32_t cmdline_low_32, cmdline_ext_32;
+
+	if (image->type == KEXEC_TYPE_CRASH) {
+		len = sprintf(cmdline_ptr,
+			"elfcorehdr=0x%lx ", image->elf_load_addr);
+	}
+	memcpy(cmdline_ptr + len, cmdline, cmdline_len);
+	cmdline_len += len;
+
+	cmdline_ptr[cmdline_len - 1] = '\0';
+
+	pr_debug("Final command line is: %s\n", cmdline_ptr);
+	cmdline_ptr_phys = bootparams_load_addr + cmdline_offset;
+	cmdline_low_32 = cmdline_ptr_phys & 0xffffffffUL;
+	cmdline_ext_32 = cmdline_ptr_phys >> 32;
+
+	params->hdr.cmd_line_ptr = cmdline_low_32;
+	if (cmdline_ext_32)
+		params->ext_cmd_line_ptr = cmdline_ext_32;
+
+	return 0;
+}
+
+static int setup_e820_entries(struct boot_params *params)
+{
+	unsigned int nr_e820_entries;
+
+	nr_e820_entries = e820_table_kexec->nr_entries;
+
+	/* TODO: Pass entries more than E820_MAX_ENTRIES_ZEROPAGE in bootparams setup data */
+	if (nr_e820_entries > E820_MAX_ENTRIES_ZEROPAGE)
+		nr_e820_entries = E820_MAX_ENTRIES_ZEROPAGE;
+
+	params->e820_entries = nr_e820_entries;
+	memcpy(&params->e820_table, &e820_table_kexec->entries, nr_e820_entries*sizeof(struct e820_entry));
+
+	return 0;
+}
+
+enum { RNG_SEED_LENGTH = 32 };
+
+static void
+setup_rng_seed(struct boot_params *params, unsigned long params_load_addr,
+	       unsigned int rng_seed_setup_data_offset)
+{
+	struct setup_data *sd = (void *)params + rng_seed_setup_data_offset;
+	unsigned long setup_data_phys;
+
+	if (!rng_is_initialized())
+		return;
+
+	sd->type = SETUP_RNG_SEED;
+	sd->len = RNG_SEED_LENGTH;
+	get_random_bytes(sd->data, RNG_SEED_LENGTH);
+	setup_data_phys = params_load_addr + rng_seed_setup_data_offset;
+	sd->next = params->hdr.setup_data;
+	params->hdr.setup_data = setup_data_phys;
+}
+
+#ifdef CONFIG_EFI
+static int setup_efi_info_memmap(struct boot_params *params,
+				  unsigned long params_load_addr,
+				  unsigned int efi_map_offset,
+				  unsigned int efi_map_sz)
+{
+	void *efi_map = (void *)params + efi_map_offset;
+	unsigned long efi_map_phys_addr = params_load_addr + efi_map_offset;
+	struct efi_info *ei = &params->efi_info;
+
+	if (!efi_map_sz)
+		return 0;
+
+	efi_runtime_map_copy(efi_map, efi_map_sz);
+
+	ei->efi_memmap = efi_map_phys_addr & 0xffffffff;
+	ei->efi_memmap_hi = efi_map_phys_addr >> 32;
+	ei->efi_memmap_size = efi_map_sz;
+
+	return 0;
+}
+
+static int
+prepare_add_efi_setup_data(struct boot_params *params,
+		       unsigned long params_load_addr,
+		       unsigned int efi_setup_data_offset)
+{
+	unsigned long setup_data_phys;
+	struct setup_data *sd = (void *)params + efi_setup_data_offset;
+	struct efi_setup_data *esd = (void *)sd + sizeof(struct setup_data);
+
+	esd->fw_vendor = efi_fw_vendor;
+	esd->tables = efi_config_table;
+	esd->smbios = efi.smbios;
+
+	sd->type = SETUP_EFI;
+	sd->len = sizeof(struct efi_setup_data);
+
+	/* Add setup data */
+	setup_data_phys = params_load_addr + efi_setup_data_offset;
+	sd->next = params->hdr.setup_data;
+	params->hdr.setup_data = setup_data_phys;
+
+	return 0;
+}
+
+static int
+setup_efi_state(struct boot_params *params, unsigned long params_load_addr,
+		unsigned int efi_map_offset, unsigned int efi_map_sz,
+		unsigned int efi_setup_data_offset)
+{
+	struct efi_info *current_ei = &boot_params.efi_info;
+	struct efi_info *ei = &params->efi_info;
+
+	if (!efi_enabled(EFI_RUNTIME_SERVICES))
+		return 0;
+
+	if (!current_ei->efi_memmap_size)
+		return 0;
+
+	params->secure_boot = boot_params.secure_boot;
+	ei->efi_loader_signature = current_ei->efi_loader_signature;
+	ei->efi_systab = current_ei->efi_systab;
+	ei->efi_systab_hi = current_ei->efi_systab_hi;
+
+	ei->efi_memdesc_version = current_ei->efi_memdesc_version;
+	ei->efi_memdesc_size = efi_get_runtime_map_desc_size();
+
+	setup_efi_info_memmap(params, params_load_addr, efi_map_offset,
+			      efi_map_sz);
+	prepare_add_efi_setup_data(params, params_load_addr,
+				   efi_setup_data_offset);
+	return 0;
+}
+#endif /* CONFIG_EFI */
+
+static void
+setup_ima_state(const struct kimage *image, struct boot_params *params,
+		unsigned long params_load_addr,
+		unsigned int ima_setup_data_offset)
+{
+#ifdef CONFIG_IMA_KEXEC
+	struct setup_data *sd = (void *)params + ima_setup_data_offset;
+	unsigned long setup_data_phys;
+	struct ima_setup_data *ima;
+
+	if (!image->ima_buffer_size)
+		return;
+
+	sd->type = SETUP_IMA;
+	sd->len = sizeof(*ima);
+
+	ima = (void *)sd + sizeof(struct setup_data);
+	ima->addr = image->ima_buffer_addr;
+	ima->size = image->ima_buffer_size;
+
+	/* Add setup data */
+	setup_data_phys = params_load_addr + ima_setup_data_offset;
+	sd->next = params->hdr.setup_data;
+	params->hdr.setup_data = setup_data_phys;
+#endif /* CONFIG_IMA_KEXEC */
+}
+
+static int
+setup_boot_parameters(struct kimage *image, struct boot_params *params,
+		      unsigned long params_load_addr,
+		      unsigned int efi_map_offset, unsigned int efi_map_sz,
+		      unsigned int setup_data_offset)
+{
+	unsigned int nr_e820_entries;
+	unsigned long long mem_k, start, end;
+	int i, ret = 0;
+
+	/* Get subarch from existing bootparams */
+	params->hdr.hardware_subarch = boot_params.hdr.hardware_subarch;
+
+	/* Copying screen_info will do? */
+	memcpy(&params->screen_info, &screen_info, sizeof(struct screen_info));
+
+	/* Fill in memsize later */
+	params->screen_info.ext_mem_k = 0;
+	params->alt_mem_k = 0;
+
+	/* Always fill in RSDP: it is either 0 or a valid value */
+	params->acpi_rsdp_addr = boot_params.acpi_rsdp_addr;
+
+	/* Default APM info */
+	memset(&params->apm_bios_info, 0, sizeof(params->apm_bios_info));
+
+	/* Default drive info */
+	memset(&params->hd0_info, 0, sizeof(params->hd0_info));
+	memset(&params->hd1_info, 0, sizeof(params->hd1_info));
+
+	if (image->type == KEXEC_TYPE_CRASH) {
+		ret = crash_setup_memmap_entries(image, params);
+		if (ret)
+			return ret;
+	} else
+		setup_e820_entries(params);
+
+	nr_e820_entries = params->e820_entries;
+
+	for (i = 0; i < nr_e820_entries; i++) {
+		if (params->e820_table[i].type != E820_TYPE_RAM)
+			continue;
+		start = params->e820_table[i].addr;
+		end = params->e820_table[i].addr + params->e820_table[i].size - 1;
+
+		if ((start <= 0x100000) && end > 0x100000) {
+			mem_k = (end >> 10) - (0x100000 >> 10);
+			params->screen_info.ext_mem_k = mem_k;
+			params->alt_mem_k = mem_k;
+			if (mem_k > 0xfc00)
+				params->screen_info.ext_mem_k = 0xfc00; /* 64M*/
+			if (mem_k > 0xffffffff)
+				params->alt_mem_k = 0xffffffff;
+		}
+	}
+
+#ifdef CONFIG_EFI
+	/* Setup EFI state */
+	setup_efi_state(params, params_load_addr, efi_map_offset, efi_map_sz,
+			setup_data_offset);
+	setup_data_offset += sizeof(struct setup_data) +
+			sizeof(struct efi_setup_data);
+#endif
+
+	if (IS_ENABLED(CONFIG_IMA_KEXEC)) {
+		/* Setup IMA log buffer state */
+		setup_ima_state(image, params, params_load_addr,
+				setup_data_offset);
+		setup_data_offset += sizeof(struct setup_data) +
+				     sizeof(struct ima_setup_data);
+	}
+
+	/* Setup RNG seed */
+	setup_rng_seed(params, params_load_addr, setup_data_offset);
+
+	/* Setup EDD info */
+	memcpy(params->eddbuf, boot_params.eddbuf,
+				EDDMAXNR * sizeof(struct edd_info));
+	params->eddbuf_entries = boot_params.eddbuf_entries;
+
+	memcpy(params->edd_mbr_sig_buffer, boot_params.edd_mbr_sig_buffer,
+	       EDD_MBR_SIG_MAX * sizeof(unsigned int));
+
+	return ret;
+}
+
+static int bzImage64_probe(const char *buf, unsigned long len)
+{
+	int ret = -ENOEXEC;
+	struct setup_header *header;
+
+	/* kernel should be at least two sectors long */
+	if (len < 2 * 512) {
+		pr_err("File is too short to be a bzImage\n");
+		return ret;
+	}
+
+	header = (struct setup_header *)(buf + offsetof(struct boot_params, hdr));
+	if (memcmp((char *)&header->header, "HdrS", 4) != 0) {
+		pr_err("Not a bzImage\n");
+		return ret;
+	}
+
+	if (header->boot_flag != 0xAA55) {
+		pr_err("No x86 boot sector present\n");
+		return ret;
+	}
+
+	if (header->version < 0x020C) {
+		pr_err("Must be at least protocol version 2.12\n");
+		return ret;
+	}
+
+	if (!(header->loadflags & LOADED_HIGH)) {
+		pr_err("zImage not a bzImage\n");
+		return ret;
+	}
+
+	if (!(header->xloadflags & XLF_KERNEL_64)) {
+		pr_err("Not a bzImage64. XLF_KERNEL_64 is not set.\n");
+		return ret;
+	}
+
+	if (!(header->xloadflags & XLF_CAN_BE_LOADED_ABOVE_4G)) {
+		pr_err("XLF_CAN_BE_LOADED_ABOVE_4G is not set.\n");
+		return ret;
+	}
+
+	/*
+	 * Can't handle 32bit EFI as it does not allow loading kernel
+	 * above 4G. This should be handled by 32bit bzImage loader
+	 */
+	if (efi_enabled(EFI_RUNTIME_SERVICES) && !efi_enabled(EFI_64BIT)) {
+		pr_debug("EFI is 32 bit. Can't load kernel above 4G.\n");
+		return ret;
+	}
+
+	if (!(header->xloadflags & XLF_5LEVEL) && pgtable_l5_enabled()) {
+		pr_err("bzImage cannot handle 5-level paging mode.\n");
+		return ret;
+	}
+
+	/* I've got a bzImage */
+	pr_debug("It's a relocatable bzImage64\n");
+	ret = 0;
+
+	return ret;
+}
+
+static void *bzImage64_load(struct kimage *image, char *kernel,
+			    unsigned long kernel_len, char *initrd,
+			    unsigned long initrd_len, char *cmdline,
+			    unsigned long cmdline_len)
+{
+
+	struct setup_header *header;
+	int setup_sects, kern16_size, ret = 0;
+	unsigned long setup_header_size, params_cmdline_sz;
+	struct boot_params *params;
+	unsigned long bootparam_load_addr, kernel_load_addr, initrd_load_addr;
+	struct bzimage64_data *ldata;
+	struct kexec_entry64_regs regs64;
+	void *stack;
+	unsigned int setup_hdr_offset = offsetof(struct boot_params, hdr);
+	unsigned int efi_map_offset, efi_map_sz, efi_setup_data_offset;
+	struct kexec_buf kbuf = { .image = image, .buf_max = ULONG_MAX,
+				  .top_down = true };
+	struct kexec_buf pbuf = { .image = image, .buf_min = MIN_PURGATORY_ADDR,
+				  .buf_max = ULONG_MAX, .top_down = true };
+
+	header = (struct setup_header *)(kernel + setup_hdr_offset);
+	setup_sects = header->setup_sects;
+	if (setup_sects == 0)
+		setup_sects = 4;
+
+	kern16_size = (setup_sects + 1) * 512;
+	if (kernel_len < kern16_size) {
+		pr_err("bzImage truncated\n");
+		return ERR_PTR(-ENOEXEC);
+	}
+
+	if (cmdline_len > header->cmdline_size) {
+		pr_err("Kernel command line too long\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	/*
+	 * In case of crash dump, we will append elfcorehdr=<addr> to
+	 * command line. Make sure it does not overflow
+	 */
+	if (cmdline_len + MAX_ELFCOREHDR_STR_LEN > header->cmdline_size) {
+		pr_debug("Appending elfcorehdr=<addr> to command line exceeds maximum allowed length\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	/* Allocate and load backup region */
+	if (image->type == KEXEC_TYPE_CRASH) {
+		ret = crash_load_segments(image);
+		if (ret)
+			return ERR_PTR(ret);
+	}
+
+	/*
+	 * Load purgatory. For 64bit entry point, purgatory  code can be
+	 * anywhere.
+	 */
+	ret = kexec_load_purgatory(image, &pbuf);
+	if (ret) {
+		pr_err("Loading purgatory failed\n");
+		return ERR_PTR(ret);
+	}
+
+	pr_debug("Loaded purgatory at 0x%lx\n", pbuf.mem);
+
+
+	/*
+	 * Load Bootparams and cmdline and space for efi stuff.
+	 *
+	 * Allocate memory together for multiple data structures so
+	 * that they all can go in single area/segment and we don't
+	 * have to create separate segment for each. Keeps things
+	 * little bit simple
+	 */
+	efi_map_sz = efi_get_runtime_map_size();
+	params_cmdline_sz = sizeof(struct boot_params) + cmdline_len +
+				MAX_ELFCOREHDR_STR_LEN;
+	params_cmdline_sz = ALIGN(params_cmdline_sz, 16);
+	kbuf.bufsz = params_cmdline_sz + ALIGN(efi_map_sz, 16) +
+				sizeof(struct setup_data) +
+				sizeof(struct efi_setup_data) +
+				sizeof(struct setup_data) +
+				RNG_SEED_LENGTH;
+
+	if (IS_ENABLED(CONFIG_IMA_KEXEC))
+		kbuf.bufsz += sizeof(struct setup_data) +
+			      sizeof(struct ima_setup_data);
+
+	params = kzalloc(kbuf.bufsz, GFP_KERNEL);
+	if (!params)
+		return ERR_PTR(-ENOMEM);
+	efi_map_offset = params_cmdline_sz;
+	efi_setup_data_offset = efi_map_offset + ALIGN(efi_map_sz, 16);
+
+	/* Copy setup header onto bootparams. Documentation/x86/boot.rst */
+	setup_header_size = 0x0202 + kernel[0x0201] - setup_hdr_offset;
+
+	/* Is there a limit on setup header size? */
+	memcpy(&params->hdr, (kernel + setup_hdr_offset), setup_header_size);
+
+	kbuf.buffer = params;
+	kbuf.memsz = kbuf.bufsz;
+	kbuf.buf_align = 16;
+	kbuf.buf_min = MIN_BOOTPARAM_ADDR;
+	ret = kexec_add_buffer(&kbuf);
+	if (ret)
+		goto out_free_params;
+	bootparam_load_addr = kbuf.mem;
+	pr_debug("Loaded boot_param, command line and misc at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+		 bootparam_load_addr, kbuf.bufsz, kbuf.bufsz);
+
+	/* Load kernel */
+	kbuf.buffer = kernel + kern16_size;
+	kbuf.bufsz =  kernel_len - kern16_size;
+	kbuf.memsz = PAGE_ALIGN(header->init_size);
+	kbuf.buf_align = header->kernel_alignment;
+	kbuf.buf_min = MIN_KERNEL_LOAD_ADDR;
+	kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
+	ret = kexec_add_buffer(&kbuf);
+	if (ret)
+		goto out_free_params;
+	kernel_load_addr = kbuf.mem;
+
+	pr_debug("Loaded 64bit kernel at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+		 kernel_load_addr, kbuf.bufsz, kbuf.memsz);
+
+	/* Load initrd high */
+	if (initrd) {
+		kbuf.buffer = initrd;
+		kbuf.bufsz = kbuf.memsz = initrd_len;
+		kbuf.buf_align = PAGE_SIZE;
+		kbuf.buf_min = MIN_INITRD_LOAD_ADDR;
+		kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
+		ret = kexec_add_buffer(&kbuf);
+		if (ret)
+			goto out_free_params;
+		initrd_load_addr = kbuf.mem;
+
+		pr_debug("Loaded initrd at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
+				initrd_load_addr, initrd_len, initrd_len);
+
+		setup_initrd(params, initrd_load_addr, initrd_len);
+	}
+
+	setup_cmdline(image, params, bootparam_load_addr,
+		      sizeof(struct boot_params), cmdline, cmdline_len);
+
+	/* bootloader info. Do we need a separate ID for kexec kernel loader? */
+	params->hdr.type_of_loader = 0x0D << 4;
+	params->hdr.loadflags = 0;
+
+	/* Setup purgatory regs for entry */
+	ret = kexec_purgatory_get_set_symbol(image, "entry64_regs", &regs64,
+					     sizeof(regs64), 1);
+	if (ret)
+		goto out_free_params;
+
+	regs64.rbx = 0; /* Bootstrap Processor */
+	regs64.rsi = bootparam_load_addr;
+	regs64.rip = kernel_load_addr + 0x200;
+	stack = kexec_purgatory_get_symbol_addr(image, "stack_end");
+	if (IS_ERR(stack)) {
+		pr_err("Could not find address of symbol stack_end\n");
+		ret = -EINVAL;
+		goto out_free_params;
+	}
+
+	regs64.rsp = (unsigned long)stack;
+	ret = kexec_purgatory_get_set_symbol(image, "entry64_regs", &regs64,
+					     sizeof(regs64), 0);
+	if (ret)
+		goto out_free_params;
+
+	ret = setup_boot_parameters(image, params, bootparam_load_addr,
+				    efi_map_offset, efi_map_sz,
+				    efi_setup_data_offset);
+	if (ret)
+		goto out_free_params;
+
+	/* Allocate loader specific data */
+	ldata = kzalloc(sizeof(struct bzimage64_data), GFP_KERNEL);
+	if (!ldata) {
+		ret = -ENOMEM;
+		goto out_free_params;
+	}
+
+	/*
+	 * Store pointer to params so that it could be freed after loading
+	 * params segment has been loaded and contents have been copied
+	 * somewhere else.
+	 */
+	ldata->bootparams_buf = params;
+	return ldata;
+
+out_free_params:
+	kfree(params);
+	return ERR_PTR(ret);
+}
+
+/* This cleanup function is called after various segments have been loaded */
+static int bzImage64_cleanup(void *loader_data)
+{
+	struct bzimage64_data *ldata = loader_data;
+
+	if (!ldata)
+		return 0;
+
+	kfree(ldata->bootparams_buf);
+	ldata->bootparams_buf = NULL;
+
+	return 0;
+}
+
+const struct kexec_file_ops kexec_bzImage64_ops = {
+	.probe = bzImage64_probe,
+	.load = bzImage64_load,
+	.cleanup = bzImage64_cleanup,
+#ifdef CONFIG_KEXEC_BZIMAGE_VERIFY_SIG
+	.verify_sig = kexec_kernel_verify_pe_sig,
+#endif
+};