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, 471 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
new file mode 100644
index 000000000..3ddc65c63
--- /dev/null
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -0,0 +1,471 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ARCH_POWERPC_UACCESS_H
+#define _ARCH_POWERPC_UACCESS_H
+
+#include <asm/processor.h>
+#include <asm/page.h>
+#include <asm/extable.h>
+#include <asm/kup.h>
+
+#ifdef __powerpc64__
+/* We use TASK_SIZE_USER64 as TASK_SIZE is not constant */
+#define TASK_SIZE_MAX		TASK_SIZE_USER64
+#endif
+
+#include <asm-generic/access_ok.h>
+
+/*
+ * These are the main single-value transfer routines.  They automatically
+ * use the right size if we just have the right pointer type.
+ *
+ * This gets kind of ugly. We want to return _two_ values in "get_user()"
+ * and yet we don't want to do any pointers, because that is too much
+ * of a performance impact. Thus we have a few rather ugly macros here,
+ * and hide all the ugliness from the user.
+ *
+ * The "__xxx" versions of the user access functions are versions that
+ * do not verify the address space, that must have been done previously
+ * with a separate "access_ok()" call (this is used when we do multiple
+ * accesses to the same area of user memory).
+ *
+ * As we use the same address space for kernel and user data on the
+ * PowerPC, we can just do these as direct assignments.  (Of course, the
+ * exception handling means that it's no longer "just"...)
+ *
+ */
+#define __put_user(x, ptr)					\
+({								\
+	long __pu_err;						\
+	__typeof__(*(ptr)) __user *__pu_addr = (ptr);		\
+	__typeof__(*(ptr)) __pu_val = (__typeof__(*(ptr)))(x);	\
+	__typeof__(sizeof(*(ptr))) __pu_size = sizeof(*(ptr));	\
+								\
+	might_fault();						\
+	do {							\
+		__label__ __pu_failed;				\
+								\
+		allow_write_to_user(__pu_addr, __pu_size);	\
+		__put_user_size_goto(__pu_val, __pu_addr, __pu_size, __pu_failed);	\
+		prevent_write_to_user(__pu_addr, __pu_size);	\
+		__pu_err = 0;					\
+		break;						\
+								\
+__pu_failed:							\
+		prevent_write_to_user(__pu_addr, __pu_size);	\
+		__pu_err = -EFAULT;				\
+	} while (0);						\
+								\
+	__pu_err;						\
+})
+
+#define put_user(x, ptr)						\
+({									\
+	__typeof__(*(ptr)) __user *_pu_addr = (ptr);			\
+									\
+	access_ok(_pu_addr, sizeof(*(ptr))) ?				\
+		  __put_user(x, _pu_addr) : -EFAULT;			\
+})
+
+/*
+ * We don't tell gcc that we are accessing memory, but this is OK
+ * because we do not write to any memory gcc knows about, so there
+ * are no aliasing issues.
+ */
+#define __put_user_asm_goto(x, addr, label, op)			\
+	asm_volatile_goto(					\
+		"1:	" op "%U1%X1 %0,%1	# put_user\n"	\
+		EX_TABLE(1b, %l2)				\
+		:						\
+		: "r" (x), "m<>" (*addr)		\
+		:						\
+		: label)
+
+#ifdef __powerpc64__
+#define __put_user_asm2_goto(x, ptr, label)			\
+	__put_user_asm_goto(x, ptr, label, "std")
+#else /* __powerpc64__ */
+#define __put_user_asm2_goto(x, addr, label)			\
+	asm_volatile_goto(					\
+		"1:	stw%X1 %0, %1\n"			\
+		"2:	stw%X1 %L0, %L1\n"			\
+		EX_TABLE(1b, %l2)				\
+		EX_TABLE(2b, %l2)				\
+		:						\
+		: "r" (x), "m" (*addr)				\
+		:						\
+		: label)
+#endif /* __powerpc64__ */
+
+#define __put_user_size_goto(x, ptr, size, label)		\
+do {								\
+	__typeof__(*(ptr)) __user *__pus_addr = (ptr);		\
+								\
+	switch (size) {						\
+	case 1: __put_user_asm_goto(x, __pus_addr, label, "stb"); break;	\
+	case 2: __put_user_asm_goto(x, __pus_addr, label, "sth"); break;	\
+	case 4: __put_user_asm_goto(x, __pus_addr, label, "stw"); break;	\
+	case 8: __put_user_asm2_goto(x, __pus_addr, label); break;		\
+	default: BUILD_BUG();					\
+	}							\
+} while (0)
+
+/*
+ * This does an atomic 128 byte aligned load from userspace.
+ * Upto caller to do enable_kernel_vmx() before calling!
+ */
+#define __get_user_atomic_128_aligned(kaddr, uaddr, err)		\
+	__asm__ __volatile__(				\
+		".machine push\n"			\
+		".machine altivec\n"			\
+		"1:	lvx  0,0,%1	# get user\n"	\
+		" 	stvx 0,0,%2	# put kernel\n"	\
+		".machine pop\n"			\
+		"2:\n"					\
+		".section .fixup,\"ax\"\n"		\
+		"3:	li %0,%3\n"			\
+		"	b 2b\n"				\
+		".previous\n"				\
+		EX_TABLE(1b, 3b)			\
+		: "=r" (err)			\
+		: "b" (uaddr), "b" (kaddr), "i" (-EFAULT), "0" (err))
+
+#ifdef CONFIG_CC_HAS_ASM_GOTO_OUTPUT
+
+#define __get_user_asm_goto(x, addr, label, op)			\
+	asm_volatile_goto(					\
+		"1:	"op"%U1%X1 %0, %1	# get_user\n"	\
+		EX_TABLE(1b, %l2)				\
+		: "=r" (x)					\
+		: "m<>" (*addr)				\
+		:						\
+		: label)
+
+#ifdef __powerpc64__
+#define __get_user_asm2_goto(x, addr, label)			\
+	__get_user_asm_goto(x, addr, label, "ld")
+#else /* __powerpc64__ */
+#define __get_user_asm2_goto(x, addr, label)			\
+	asm_volatile_goto(					\
+		"1:	lwz%X1 %0, %1\n"			\
+		"2:	lwz%X1 %L0, %L1\n"			\
+		EX_TABLE(1b, %l2)				\
+		EX_TABLE(2b, %l2)				\
+		: "=&r" (x)					\
+		: "m" (*addr)					\
+		:						\
+		: label)
+#endif /* __powerpc64__ */
+
+#define __get_user_size_goto(x, ptr, size, label)				\
+do {										\
+	BUILD_BUG_ON(size > sizeof(x));						\
+	switch (size) {								\
+	case 1: __get_user_asm_goto(x, (u8 __user *)ptr, label, "lbz"); break;	\
+	case 2: __get_user_asm_goto(x, (u16 __user *)ptr, label, "lhz"); break;	\
+	case 4: __get_user_asm_goto(x, (u32 __user *)ptr, label, "lwz"); break;	\
+	case 8: __get_user_asm2_goto(x, (u64 __user *)ptr, label);  break;	\
+	default: x = 0; BUILD_BUG();						\
+	}									\
+} while (0)
+
+#define __get_user_size_allowed(x, ptr, size, retval)			\
+do {									\
+		__label__ __gus_failed;					\
+									\
+		__get_user_size_goto(x, ptr, size, __gus_failed);	\
+		retval = 0;						\
+		break;							\
+__gus_failed:								\
+		x = 0;							\
+		retval = -EFAULT;					\
+} while (0)
+
+#else /* CONFIG_CC_HAS_ASM_GOTO_OUTPUT */
+
+#define __get_user_asm(x, addr, err, op)		\
+	__asm__ __volatile__(				\
+		"1:	"op"%U2%X2 %1, %2	# get_user\n"	\
+		"2:\n"					\
+		".section .fixup,\"ax\"\n"		\
+		"3:	li %0,%3\n"			\
+		"	li %1,0\n"			\
+		"	b 2b\n"				\
+		".previous\n"				\
+		EX_TABLE(1b, 3b)			\
+		: "=r" (err), "=r" (x)			\
+		: "m<>" (*addr), "i" (-EFAULT), "0" (err))
+
+#ifdef __powerpc64__
+#define __get_user_asm2(x, addr, err)			\
+	__get_user_asm(x, addr, err, "ld")
+#else /* __powerpc64__ */
+#define __get_user_asm2(x, addr, err)			\
+	__asm__ __volatile__(				\
+		"1:	lwz%X2 %1, %2\n"			\
+		"2:	lwz%X2 %L1, %L2\n"		\
+		"3:\n"					\
+		".section .fixup,\"ax\"\n"		\
+		"4:	li %0,%3\n"			\
+		"	li %1,0\n"			\
+		"	li %1+1,0\n"			\
+		"	b 3b\n"				\
+		".previous\n"				\
+		EX_TABLE(1b, 4b)			\
+		EX_TABLE(2b, 4b)			\
+		: "=r" (err), "=&r" (x)			\
+		: "m" (*addr), "i" (-EFAULT), "0" (err))
+#endif /* __powerpc64__ */
+
+#define __get_user_size_allowed(x, ptr, size, retval)		\
+do {								\
+	retval = 0;						\
+	BUILD_BUG_ON(size > sizeof(x));				\
+	switch (size) {						\
+	case 1: __get_user_asm(x, (u8 __user *)ptr, retval, "lbz"); break;	\
+	case 2: __get_user_asm(x, (u16 __user *)ptr, retval, "lhz"); break;	\
+	case 4: __get_user_asm(x, (u32 __user *)ptr, retval, "lwz"); break;	\
+	case 8: __get_user_asm2(x, (u64 __user *)ptr, retval);  break;	\
+	default: x = 0; BUILD_BUG();				\
+	}							\
+} while (0)
+
+#define __get_user_size_goto(x, ptr, size, label)		\
+do {								\
+	long __gus_retval;					\
+								\
+	__get_user_size_allowed(x, ptr, size, __gus_retval);	\
+	if (__gus_retval)					\
+		goto label;					\
+} while (0)
+
+#endif /* CONFIG_CC_HAS_ASM_GOTO_OUTPUT */
+
+/*
+ * This is a type: either unsigned long, if the argument fits into
+ * that type, or otherwise unsigned long long.
+ */
+#define __long_type(x) \
+	__typeof__(__builtin_choose_expr(sizeof(x) > sizeof(0UL), 0ULL, 0UL))
+
+#define __get_user(x, ptr)					\
+({								\
+	long __gu_err;						\
+	__long_type(*(ptr)) __gu_val;				\
+	__typeof__(*(ptr)) __user *__gu_addr = (ptr);	\
+	__typeof__(sizeof(*(ptr))) __gu_size = sizeof(*(ptr));	\
+								\
+	might_fault();					\
+	allow_read_from_user(__gu_addr, __gu_size);		\
+	__get_user_size_allowed(__gu_val, __gu_addr, __gu_size, __gu_err);	\
+	prevent_read_from_user(__gu_addr, __gu_size);		\
+	(x) = (__typeof__(*(ptr)))__gu_val;			\
+								\
+	__gu_err;						\
+})
+
+#define get_user(x, ptr)						\
+({									\
+	__typeof__(*(ptr)) __user *_gu_addr = (ptr);			\
+									\
+	access_ok(_gu_addr, sizeof(*(ptr))) ?				\
+		  __get_user(x, _gu_addr) :				\
+		  ((x) = (__force __typeof__(*(ptr)))0, -EFAULT);	\
+})
+
+/* more complex routines */
+
+extern unsigned long __copy_tofrom_user(void __user *to,
+		const void __user *from, unsigned long size);
+
+#ifdef __powerpc64__
+static inline unsigned long
+raw_copy_in_user(void __user *to, const void __user *from, unsigned long n)
+{
+	unsigned long ret;
+
+	allow_read_write_user(to, from, n);
+	ret = __copy_tofrom_user(to, from, n);
+	prevent_read_write_user(to, from, n);
+	return ret;
+}
+#endif /* __powerpc64__ */
+
+static inline unsigned long raw_copy_from_user(void *to,
+		const void __user *from, unsigned long n)
+{
+	unsigned long ret;
+
+	allow_read_from_user(from, n);
+	ret = __copy_tofrom_user((__force void __user *)to, from, n);
+	prevent_read_from_user(from, n);
+	return ret;
+}
+
+static inline unsigned long
+raw_copy_to_user(void __user *to, const void *from, unsigned long n)
+{
+	unsigned long ret;
+
+	allow_write_to_user(to, n);
+	ret = __copy_tofrom_user(to, (__force const void __user *)from, n);
+	prevent_write_to_user(to, n);
+	return ret;
+}
+
+unsigned long __arch_clear_user(void __user *addr, unsigned long size);
+
+static inline unsigned long __clear_user(void __user *addr, unsigned long size)
+{
+	unsigned long ret;
+
+	might_fault();
+	allow_write_to_user(addr, size);
+	ret = __arch_clear_user(addr, size);
+	prevent_write_to_user(addr, size);
+	return ret;
+}
+
+static inline unsigned long clear_user(void __user *addr, unsigned long size)
+{
+	return likely(access_ok(addr, size)) ? __clear_user(addr, size) : size;
+}
+
+extern long strncpy_from_user(char *dst, const char __user *src, long count);
+extern __must_check long strnlen_user(const char __user *str, long n);
+
+#ifdef CONFIG_ARCH_HAS_COPY_MC
+unsigned long __must_check
+copy_mc_generic(void *to, const void *from, unsigned long size);
+
+static inline unsigned long __must_check
+copy_mc_to_kernel(void *to, const void *from, unsigned long size)
+{
+	return copy_mc_generic(to, from, size);
+}
+#define copy_mc_to_kernel copy_mc_to_kernel
+
+static inline unsigned long __must_check
+copy_mc_to_user(void __user *to, const void *from, unsigned long n)
+{
+	if (check_copy_size(from, n, true)) {
+		if (access_ok(to, n)) {
+			allow_write_to_user(to, n);
+			n = copy_mc_generic((void *)to, from, n);
+			prevent_write_to_user(to, n);
+		}
+	}
+
+	return n;
+}
+#endif
+
+extern long __copy_from_user_flushcache(void *dst, const void __user *src,
+		unsigned size);
+extern void memcpy_page_flushcache(char *to, struct page *page, size_t offset,
+			   size_t len);
+
+static __must_check inline bool user_access_begin(const void __user *ptr, size_t len)
+{
+	if (unlikely(!access_ok(ptr, len)))
+		return false;
+
+	might_fault();
+
+	allow_read_write_user((void __user *)ptr, ptr, len);
+	return true;
+}
+#define user_access_begin	user_access_begin
+#define user_access_end		prevent_current_access_user
+#define user_access_save	prevent_user_access_return
+#define user_access_restore	restore_user_access
+
+static __must_check inline bool
+user_read_access_begin(const void __user *ptr, size_t len)
+{
+	if (unlikely(!access_ok(ptr, len)))
+		return false;
+
+	might_fault();
+
+	allow_read_from_user(ptr, len);
+	return true;
+}
+#define user_read_access_begin	user_read_access_begin
+#define user_read_access_end		prevent_current_read_from_user
+
+static __must_check inline bool
+user_write_access_begin(const void __user *ptr, size_t len)
+{
+	if (unlikely(!access_ok(ptr, len)))
+		return false;
+
+	might_fault();
+
+	allow_write_to_user((void __user *)ptr, len);
+	return true;
+}
+#define user_write_access_begin	user_write_access_begin
+#define user_write_access_end		prevent_current_write_to_user
+
+#define unsafe_get_user(x, p, e) do {					\
+	__long_type(*(p)) __gu_val;				\
+	__typeof__(*(p)) __user *__gu_addr = (p);		\
+								\
+	__get_user_size_goto(__gu_val, __gu_addr, sizeof(*(p)), e); \
+	(x) = (__typeof__(*(p)))__gu_val;			\
+} while (0)
+
+#define unsafe_put_user(x, p, e) \
+	__put_user_size_goto((__typeof__(*(p)))(x), (p), sizeof(*(p)), e)
+
+#define unsafe_copy_from_user(d, s, l, e) \
+do {											\
+	u8 *_dst = (u8 *)(d);								\
+	const u8 __user *_src = (const u8 __user *)(s);					\
+	size_t _len = (l);								\
+	int _i;										\
+											\
+	for (_i = 0; _i < (_len & ~(sizeof(u64) - 1)); _i += sizeof(u64))		\
+		unsafe_get_user(*(u64 *)(_dst + _i), (u64 __user *)(_src + _i), e);	\
+	if (_len & 4) {									\
+		unsafe_get_user(*(u32 *)(_dst + _i), (u32 __user *)(_src + _i), e);	\
+		_i += 4;								\
+	}										\
+	if (_len & 2) {									\
+		unsafe_get_user(*(u16 *)(_dst + _i), (u16 __user *)(_src + _i), e);	\
+		_i += 2;								\
+	}										\
+	if (_len & 1)									\
+		unsafe_get_user(*(u8 *)(_dst + _i), (u8 __user *)(_src + _i), e);	\
+} while (0)
+
+#define unsafe_copy_to_user(d, s, l, e) \
+do {									\
+	u8 __user *_dst = (u8 __user *)(d);				\
+	const u8 *_src = (const u8 *)(s);				\
+	size_t _len = (l);						\
+	int _i;								\
+									\
+	for (_i = 0; _i < (_len & ~(sizeof(u64) - 1)); _i += sizeof(u64))	\
+		unsafe_put_user(*(u64 *)(_src + _i), (u64 __user *)(_dst + _i), e); \
+	if (_len & 4) {							\
+		unsafe_put_user(*(u32*)(_src + _i), (u32 __user *)(_dst + _i), e); \
+		_i += 4;						\
+	}								\
+	if (_len & 2) {							\
+		unsafe_put_user(*(u16*)(_src + _i), (u16 __user *)(_dst + _i), e); \
+		_i += 2;						\
+	}								\
+	if (_len & 1) \
+		unsafe_put_user(*(u8*)(_src + _i), (u8 __user *)(_dst + _i), e); \
+} while (0)
+
+#define __get_kernel_nofault(dst, src, type, err_label)			\
+	__get_user_size_goto(*((type *)(dst)),				\
+		(__force type __user *)(src), sizeof(type), err_label)
+
+#define __put_kernel_nofault(dst, src, type, err_label)			\
+	__put_user_size_goto(*((type *)(src)),				\
+		(__force type __user *)(dst), sizeof(type), err_label)
+
+#endif	/* _ARCH_POWERPC_UACCESS_H */