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().
  ...

6 files changed, 495 insertions, 0 deletions

diff --git a/arch/nios2/boot/compressed/Makefile b/arch/nios2/boot/compressed/Makefile
new file mode 100644
index 000000000..791e43092
--- /dev/null
+++ b/arch/nios2/boot/compressed/Makefile
@@ -0,0 +1,19 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# create a compressed vmlinux image from the original vmlinux
+#
+
+targets		:= vmlinux head.o misc.o piggy.o vmlinux.lds
+asflags-y	:=
+
+OBJECTS = $(obj)/head.o $(obj)/misc.o
+
+LDFLAGS_vmlinux := -T
+
+$(obj)/vmlinux: $(obj)/vmlinux.lds $(OBJECTS) $(obj)/piggy.o FORCE
+	$(call if_changed,ld)
+
+LDFLAGS_piggy.o := -r --format binary --oformat elf32-littlenios2 -T
+
+$(obj)/piggy.o: $(obj)/vmlinux.scr $(obj)/../vmlinux.gz FORCE
+	$(call if_changed,ld)
diff --git a/arch/nios2/boot/compressed/console.c b/arch/nios2/boot/compressed/console.c
new file mode 100644
index 000000000..2cb2e7c9f
--- /dev/null
+++ b/arch/nios2/boot/compressed/console.c
@@ -0,0 +1,112 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ *  Copyright (C) 2008-2010 Thomas Chou <thomas@wytron.com.tw>
+ */
+
+#include <linux/io.h>
+
+#if (defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) && defined(JTAG_UART_BASE))\
+	|| (defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) && defined(UART0_BASE))
+static void *my_ioremap(unsigned long physaddr)
+{
+	return (void *)(physaddr | CONFIG_NIOS2_IO_REGION_BASE);
+}
+#endif
+
+#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE) && defined(JTAG_UART_BASE)
+
+#define ALTERA_JTAGUART_SIZE				8
+#define ALTERA_JTAGUART_DATA_REG			0
+#define ALTERA_JTAGUART_CONTROL_REG			4
+#define ALTERA_JTAGUART_CONTROL_AC_MSK			(0x00000400)
+#define ALTERA_JTAGUART_CONTROL_WSPACE_MSK		(0xFFFF0000)
+static void *uartbase;
+
+#if defined(CONFIG_SERIAL_ALTERA_JTAGUART_CONSOLE_BYPASS)
+static void jtag_putc(int ch)
+{
+	if (readl(uartbase + ALTERA_JTAGUART_CONTROL_REG) &
+		ALTERA_JTAGUART_CONTROL_WSPACE_MSK)
+		writeb(ch, uartbase + ALTERA_JTAGUART_DATA_REG);
+}
+#else
+static void jtag_putc(int ch)
+{
+	while ((readl(uartbase + ALTERA_JTAGUART_CONTROL_REG) &
+		ALTERA_JTAGUART_CONTROL_WSPACE_MSK) == 0)
+		;
+	writeb(ch, uartbase + ALTERA_JTAGUART_DATA_REG);
+}
+#endif
+
+static int putchar(int ch)
+{
+	jtag_putc(ch);
+	return ch;
+}
+
+static void console_init(void)
+{
+	uartbase = my_ioremap((unsigned long) JTAG_UART_BASE);
+	writel(ALTERA_JTAGUART_CONTROL_AC_MSK,
+		uartbase + ALTERA_JTAGUART_CONTROL_REG);
+}
+
+#elif defined(CONFIG_SERIAL_ALTERA_UART_CONSOLE) && defined(UART0_BASE)
+
+#define ALTERA_UART_SIZE		32
+#define ALTERA_UART_TXDATA_REG		4
+#define ALTERA_UART_STATUS_REG		8
+#define ALTERA_UART_DIVISOR_REG		16
+#define ALTERA_UART_STATUS_TRDY_MSK	(0x40)
+static unsigned uartbase;
+
+static void uart_putc(int ch)
+{
+	int i;
+
+	for (i = 0; (i < 0x10000); i++) {
+		if (readw(uartbase + ALTERA_UART_STATUS_REG) &
+			ALTERA_UART_STATUS_TRDY_MSK)
+			break;
+	}
+	writeb(ch, uartbase + ALTERA_UART_TXDATA_REG);
+}
+
+static int putchar(int ch)
+{
+	uart_putc(ch);
+	if (ch == '\n')
+		uart_putc('\r');
+	return ch;
+}
+
+static void console_init(void)
+{
+	unsigned int baud, baudclk;
+
+	uartbase = (unsigned long) my_ioremap((unsigned long) UART0_BASE);
+	baud = CONFIG_SERIAL_ALTERA_UART_BAUDRATE;
+	baudclk = UART0_FREQ / baud;
+	writew(baudclk, uartbase + ALTERA_UART_DIVISOR_REG);
+}
+
+#else
+
+static int putchar(int ch)
+{
+	return ch;
+}
+
+static void console_init(void)
+{
+}
+
+#endif
+
+static int puts(const char *s)
+{
+	while (*s)
+		putchar(*s++);
+	return 0;
+}
diff --git a/arch/nios2/boot/compressed/head.S b/arch/nios2/boot/compressed/head.S
new file mode 100644
index 000000000..15c6c48dd
--- /dev/null
+++ b/arch/nios2/boot/compressed/head.S
@@ -0,0 +1,117 @@
+/*
+ * Copyright (C) 2009 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * Based on arch/nios2/kernel/head.S
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
+/*
+ *  This code can be loaded anywhere, eg FLASH ROM as reset vector,
+ *  as long as output does not overlap it.
+ */
+
+#include <linux/linkage.h>
+#include <asm/cache.h>
+
+	.text
+	.set noat
+ENTRY(_start)
+	wrctl	status, r0		/* disable interrupt */
+	/* invalidate all instruction cache */
+	movia	r1, NIOS2_ICACHE_SIZE
+	movui	r2, NIOS2_ICACHE_LINE_SIZE
+1:	initi	r1
+	sub	r1, r1, r2
+	bgt	r1, r0, 1b
+	/* invalidate all data cache */
+	movia	r1, NIOS2_DCACHE_SIZE
+	movui	r2, NIOS2_DCACHE_LINE_SIZE
+1:	initd	0(r1)
+	sub	r1, r1, r2
+	bgt	r1, r0, 1b
+
+	nextpc	r1			/* Find out where we are */
+chkadr:
+	movia	r2, chkadr
+	beq	r1, r2, finish_move	/* We are running in correct address,
+					   done */
+	/* move code, r1: src, r2: dest, r3: last dest */
+	addi	r1, r1, (_start - chkadr)	/* Source */
+	movia	r2, _start		/* Destination */
+	movia	r3, __bss_start		/* End of copy */
+1:	ldw	r8, 0(r1)		/* load a word from [r1] */
+	stw	r8, 0(r2)		/* stort a word to dest [r2] */
+	addi	r1, r1, 4		/* inc the src addr */
+	addi	r2, r2, 4		/* inc the dest addr */
+	blt	r2, r3, 1b
+	/* flush the data cache after moving */
+	movia	r1, NIOS2_DCACHE_SIZE
+	movui	r2, NIOS2_DCACHE_LINE_SIZE
+1:	flushd	0(r1)
+	sub	r1, r1, r2
+	bgt	r1, r0, 1b
+	movia	r1, finish_move
+	jmp	r1			/* jmp to linked address */
+
+finish_move:
+	/* zero out the .bss segment (uninitialized common data) */
+	movia	r2, __bss_start		/* presume nothing is between */
+	movia	r1, _end		/* the .bss and _end. */
+1: 	stb	r0, 0(r2)
+	addi	r2, r2, 1
+	bne	r1, r2, 1b
+	/*
+	 * set up the stack pointer, some where higher than _end.
+	 * The stack space must be greater than 32K for decompress.
+	 */
+	movia	sp, 0x10000
+	add	sp, sp, r1
+	/* save args passed from u-boot, maybe */
+	addi	sp, sp, -16
+	stw	r4, 0(sp)
+	stw	r5, 4(sp)
+	stw	r6, 8(sp)
+	stw	r7, 12(sp)
+	/* decompress the kernel */
+	call	decompress_kernel
+	/* pass saved args to kernel */
+	ldw	r4, 0(sp)
+	ldw	r5, 4(sp)
+	ldw	r6, 8(sp)
+	ldw	r7, 12(sp)
+
+	/* flush all data cache after decompressing */
+	movia	r1, NIOS2_DCACHE_SIZE
+	movui	r2, NIOS2_DCACHE_LINE_SIZE
+1:	flushd	0(r1)
+	sub	r1, r1, r2
+	bgt	r1, r0, 1b
+	/* flush all instruction cache */
+	movia	r1, NIOS2_ICACHE_SIZE
+	movui	r2, NIOS2_ICACHE_LINE_SIZE
+1:	flushi	r1
+	sub	r1, r1, r2
+	bgt	r1, r0, 1b
+	flushp
+	/* jump to start real kernel */
+	movia	r1, (CONFIG_NIOS2_MEM_BASE | CONFIG_NIOS2_KERNEL_REGION_BASE)
+	jmp	r1
+
+	.balign 512
+fake_headers_as_bzImage:
+	.short	0
+	.ascii	"HdrS"
+	.short	0x0202
+	.short	0
+	.short	0
+	.byte	0x00, 0x10
+	.short	0
+	.byte	0
+	.byte	1
+	.byte	0x00, 0x80
+	.long	0
+	.long	0
diff --git a/arch/nios2/boot/compressed/misc.c b/arch/nios2/boot/compressed/misc.c
new file mode 100644
index 000000000..42fc4bbe1
--- /dev/null
+++ b/arch/nios2/boot/compressed/misc.c
@@ -0,0 +1,174 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2009 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * This is a collection of several routines from gzip-1.0.3
+ * adapted for Linux.
+ *
+ * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
+ *
+ * Adapted for SH by Stuart Menefy, Aug 1999
+ *
+ * Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000
+ *
+ * Based on arch/sh/boot/compressed/misc.c
+ */
+
+#include <linux/string.h>
+
+/*
+ * gzip declarations
+ */
+#define OF(args)  args
+#define STATIC static
+
+#undef memset
+#undef memcpy
+#define memzero(s, n)		memset((s), 0, (n))
+
+typedef unsigned char  uch;
+typedef unsigned short ush;
+typedef unsigned long  ulg;
+#define WSIZE 0x8000		/* Window size must be at least 32k, */
+				/* and a power of two */
+
+static uch *inbuf;		/* input buffer */
+static uch window[WSIZE];	/* Sliding window buffer */
+
+static unsigned insize;	/* valid bytes in inbuf */
+static unsigned inptr;	/* index of next byte to be processed in inbuf */
+static unsigned outcnt;	/* bytes in output buffer */
+
+/* gzip flag byte */
+#define ASCII_FLAG	0x01 /* bit 0 set: file probably ASCII text */
+#define CONTINUATION	0x02 /* bit 1 set: continuation of multi-part gzip
+				file */
+#define EXTRA_FIELD	0x04 /* bit 2 set: extra field present */
+#define ORIG_NAME	0x08 /* bit 3 set: original file name present */
+#define COMMENT		0x10 /* bit 4 set: file comment present */
+#define ENCRYPTED	0x20 /* bit 5 set: file is encrypted */
+#define RESERVED	0xC0 /* bit 6,7:   reserved */
+
+#define get_byte()  (inptr < insize ? inbuf[inptr++] : fill_inbuf())
+
+#ifdef DEBUG
+#  define Assert(cond, msg) {if (!(cond)) error(msg); }
+#  define Trace(x) fprintf x
+#  define Tracev(x) {if (verbose) fprintf x ; }
+#  define Tracevv(x) {if (verbose > 1) fprintf x ; }
+#  define Tracec(c, x) {if (verbose && (c)) fprintf x ; }
+#  define Tracecv(c, x) {if (verbose > 1 && (c)) fprintf x ; }
+#else
+#  define Assert(cond, msg)
+#  define Trace(x)
+#  define Tracev(x)
+#  define Tracevv(x)
+#  define Tracec(c, x)
+#  define Tracecv(c, x)
+#endif
+static int  fill_inbuf(void);
+static void flush_window(void);
+static void error(char *m);
+
+extern char input_data[];
+extern int input_len;
+
+static long bytes_out;
+static uch *output_data;
+static unsigned long output_ptr;
+
+#include "console.c"
+
+static void error(char *m);
+
+int puts(const char *);
+
+extern int _end;
+static unsigned long free_mem_ptr;
+static unsigned long free_mem_end_ptr;
+
+#define HEAP_SIZE			0x10000
+
+#include "../../../../lib/inflate.c"
+
+void *memset(void *s, int c, size_t n)
+{
+	int i;
+	char *ss = (char *)s;
+
+	for (i = 0; i < n; i++)
+		ss[i] = c;
+	return s;
+}
+
+void *memcpy(void *__dest, __const void *__src, size_t __n)
+{
+	int i;
+	char *d = (char *)__dest, *s = (char *)__src;
+
+	for (i = 0; i < __n; i++)
+		d[i] = s[i];
+	return __dest;
+}
+
+/*
+ * Fill the input buffer. This is called only when the buffer is empty
+ * and at least one byte is really needed.
+ */
+static int fill_inbuf(void)
+{
+	if (insize != 0)
+		error("ran out of input data");
+
+	inbuf = input_data;
+	insize = input_len;
+	inptr = 1;
+	return inbuf[0];
+}
+
+/*
+ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+ * (Used for the decompressed data only.)
+ */
+static void flush_window(void)
+{
+	ulg c = crc;	/* temporary variable */
+	unsigned n;
+	uch *in, *out, ch;
+
+	in = window;
+	out = &output_data[output_ptr];
+	for (n = 0; n < outcnt; n++) {
+		ch = *out++ = *in++;
+		c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+	}
+	crc = c;
+	bytes_out += (ulg)outcnt;
+	output_ptr += (ulg)outcnt;
+	outcnt = 0;
+}
+
+static void error(char *x)
+{
+	puts("\nERROR\n");
+	puts(x);
+	puts("\n\n -- System halted");
+
+	while (1)	/* Halt */
+		;
+}
+
+void decompress_kernel(void)
+{
+	output_data = (void *) (CONFIG_NIOS2_MEM_BASE |
+				CONFIG_NIOS2_KERNEL_REGION_BASE);
+	output_ptr = 0;
+	free_mem_ptr = (unsigned long)&_end;
+	free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
+
+	console_init();
+	makecrc();
+	puts("Uncompressing Linux... ");
+	gunzip();
+	puts("Ok, booting the kernel.\n");
+}
diff --git a/arch/nios2/boot/compressed/vmlinux.lds.S b/arch/nios2/boot/compressed/vmlinux.lds.S
new file mode 100644
index 000000000..9b02d0c97
--- /dev/null
+++ b/arch/nios2/boot/compressed/vmlinux.lds.S
@@ -0,0 +1,45 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2009 Thomas Chou <thomas@wytron.com.tw>
+ */
+
+#include <asm-generic/vmlinux.lds.h>
+
+OUTPUT_FORMAT("elf32-littlenios2", "elf32-littlenios2", "elf32-littlenios2")
+
+OUTPUT_ARCH(nios)
+ENTRY(_start)	/* Defined in head.S */
+
+SECTIONS
+{
+	. = (CONFIG_NIOS2_MEM_BASE + CONFIG_NIOS2_BOOT_LINK_OFFSET) |	\
+		CONFIG_NIOS2_KERNEL_REGION_BASE;
+
+	_text = .;
+	.text : { *(.text) } = 0
+	.rodata : { *(.rodata) *(.rodata.*) }
+	_etext = .;
+
+	. = ALIGN(32 / 8);
+	.data : { *(.data) }
+	. = ALIGN(32 / 8);
+	_got = .;
+	.got : {
+		*(.got.plt)
+		*(.igot.plt)
+		*(.got)
+		*(.igot)
+	}
+	_egot = .;
+	_edata =  .;
+
+	. = ALIGN(32 / 8);
+	__bss_start = .;
+	.bss : { *(.bss) *(.sbss) }
+	. = ALIGN(32 / 8);
+	_ebss = .;
+	end = . ;
+	_end = . ;
+
+	got_len = (_egot - _got);
+}
diff --git a/arch/nios2/boot/compressed/vmlinux.scr b/arch/nios2/boot/compressed/vmlinux.scr
new file mode 100644
index 000000000..28c42f1d1
--- /dev/null
+++ b/arch/nios2/boot/compressed/vmlinux.scr
@@ -0,0 +1,28 @@
+/*
+ * Copyright (C) 2009 Thomas Chou <thomas@wytron.com.tw>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+SECTIONS
+{
+	.data : {
+		input_len = .;
+		LONG(input_data_end - input_data) input_data = .;
+		*(.data)
+		. = ALIGN(4);
+		input_data_end = .;
+	}
+}