From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next 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(). ... --- arch/powerpc/include/asm/uaccess.h | 471 +++++++++++++++++++++++++++++++++++++ 1 file changed, 471 insertions(+) create mode 100644 arch/powerpc/include/asm/uaccess.h (limited to 'arch/powerpc/include/asm/uaccess.h') 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 +#include +#include +#include + +#ifdef __powerpc64__ +/* We use TASK_SIZE_USER64 as TASK_SIZE is not constant */ +#define TASK_SIZE_MAX TASK_SIZE_USER64 +#endif + +#include + +/* + * 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 */ -- cgit v1.2.3