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, 522 insertions, 0 deletions

diff --git a/arch/powerpc/crypto/aes-spe-glue.c b/arch/powerpc/crypto/aes-spe-glue.c
new file mode 100644
index 000000000..efab78a3a
--- /dev/null
+++ b/arch/powerpc/crypto/aes-spe-glue.c
@@ -0,0 +1,522 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Glue code for AES implementation for SPE instructions (PPC)
+ *
+ * Based on generic implementation. The assembler module takes care
+ * about the SPE registers so it can run from interrupt context.
+ *
+ * Copyright (c) 2015 Markus Stockhausen <stockhausen@collogia.de>
+ */
+
+#include <crypto/aes.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/crypto.h>
+#include <asm/byteorder.h>
+#include <asm/switch_to.h>
+#include <crypto/algapi.h>
+#include <crypto/internal/skcipher.h>
+#include <crypto/xts.h>
+#include <crypto/gf128mul.h>
+#include <crypto/scatterwalk.h>
+
+/*
+ * MAX_BYTES defines the number of bytes that are allowed to be processed
+ * between preempt_disable() and preempt_enable(). e500 cores can issue two
+ * instructions per clock cycle using one 32/64 bit unit (SU1) and one 32
+ * bit unit (SU2). One of these can be a memory access that is executed via
+ * a single load and store unit (LSU). XTS-AES-256 takes ~780 operations per
+ * 16 byte block or 25 cycles per byte. Thus 768 bytes of input data
+ * will need an estimated maximum of 20,000 cycles. Headroom for cache misses
+ * included. Even with the low end model clocked at 667 MHz this equals to a
+ * critical time window of less than 30us. The value has been chosen to
+ * process a 512 byte disk block in one or a large 1400 bytes IPsec network
+ * packet in two runs.
+ *
+ */
+#define MAX_BYTES 768
+
+struct ppc_aes_ctx {
+	u32 key_enc[AES_MAX_KEYLENGTH_U32];
+	u32 key_dec[AES_MAX_KEYLENGTH_U32];
+	u32 rounds;
+};
+
+struct ppc_xts_ctx {
+	u32 key_enc[AES_MAX_KEYLENGTH_U32];
+	u32 key_dec[AES_MAX_KEYLENGTH_U32];
+	u32 key_twk[AES_MAX_KEYLENGTH_U32];
+	u32 rounds;
+};
+
+extern void ppc_encrypt_aes(u8 *out, const u8 *in, u32 *key_enc, u32 rounds);
+extern void ppc_decrypt_aes(u8 *out, const u8 *in, u32 *key_dec, u32 rounds);
+extern void ppc_encrypt_ecb(u8 *out, const u8 *in, u32 *key_enc, u32 rounds,
+			    u32 bytes);
+extern void ppc_decrypt_ecb(u8 *out, const u8 *in, u32 *key_dec, u32 rounds,
+			    u32 bytes);
+extern void ppc_encrypt_cbc(u8 *out, const u8 *in, u32 *key_enc, u32 rounds,
+			    u32 bytes, u8 *iv);
+extern void ppc_decrypt_cbc(u8 *out, const u8 *in, u32 *key_dec, u32 rounds,
+			    u32 bytes, u8 *iv);
+extern void ppc_crypt_ctr  (u8 *out, const u8 *in, u32 *key_enc, u32 rounds,
+			    u32 bytes, u8 *iv);
+extern void ppc_encrypt_xts(u8 *out, const u8 *in, u32 *key_enc, u32 rounds,
+			    u32 bytes, u8 *iv, u32 *key_twk);
+extern void ppc_decrypt_xts(u8 *out, const u8 *in, u32 *key_dec, u32 rounds,
+			    u32 bytes, u8 *iv, u32 *key_twk);
+
+extern void ppc_expand_key_128(u32 *key_enc, const u8 *key);
+extern void ppc_expand_key_192(u32 *key_enc, const u8 *key);
+extern void ppc_expand_key_256(u32 *key_enc, const u8 *key);
+
+extern void ppc_generate_decrypt_key(u32 *key_dec,u32 *key_enc,
+				     unsigned int key_len);
+
+static void spe_begin(void)
+{
+	/* disable preemption and save users SPE registers if required */
+	preempt_disable();
+	enable_kernel_spe();
+}
+
+static void spe_end(void)
+{
+	disable_kernel_spe();
+	/* reenable preemption */
+	preempt_enable();
+}
+
+static int ppc_aes_setkey(struct crypto_tfm *tfm, const u8 *in_key,
+		unsigned int key_len)
+{
+	struct ppc_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	switch (key_len) {
+	case AES_KEYSIZE_128:
+		ctx->rounds = 4;
+		ppc_expand_key_128(ctx->key_enc, in_key);
+		break;
+	case AES_KEYSIZE_192:
+		ctx->rounds = 5;
+		ppc_expand_key_192(ctx->key_enc, in_key);
+		break;
+	case AES_KEYSIZE_256:
+		ctx->rounds = 6;
+		ppc_expand_key_256(ctx->key_enc, in_key);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ppc_generate_decrypt_key(ctx->key_dec, ctx->key_enc, key_len);
+
+	return 0;
+}
+
+static int ppc_aes_setkey_skcipher(struct crypto_skcipher *tfm,
+				   const u8 *in_key, unsigned int key_len)
+{
+	return ppc_aes_setkey(crypto_skcipher_tfm(tfm), in_key, key_len);
+}
+
+static int ppc_xts_setkey(struct crypto_skcipher *tfm, const u8 *in_key,
+		   unsigned int key_len)
+{
+	struct ppc_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+	int err;
+
+	err = xts_verify_key(tfm, in_key, key_len);
+	if (err)
+		return err;
+
+	key_len >>= 1;
+
+	switch (key_len) {
+	case AES_KEYSIZE_128:
+		ctx->rounds = 4;
+		ppc_expand_key_128(ctx->key_enc, in_key);
+		ppc_expand_key_128(ctx->key_twk, in_key + AES_KEYSIZE_128);
+		break;
+	case AES_KEYSIZE_192:
+		ctx->rounds = 5;
+		ppc_expand_key_192(ctx->key_enc, in_key);
+		ppc_expand_key_192(ctx->key_twk, in_key + AES_KEYSIZE_192);
+		break;
+	case AES_KEYSIZE_256:
+		ctx->rounds = 6;
+		ppc_expand_key_256(ctx->key_enc, in_key);
+		ppc_expand_key_256(ctx->key_twk, in_key + AES_KEYSIZE_256);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ppc_generate_decrypt_key(ctx->key_dec, ctx->key_enc, key_len);
+
+	return 0;
+}
+
+static void ppc_aes_encrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
+{
+	struct ppc_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	spe_begin();
+	ppc_encrypt_aes(out, in, ctx->key_enc, ctx->rounds);
+	spe_end();
+}
+
+static void ppc_aes_decrypt(struct crypto_tfm *tfm, u8 *out, const u8 *in)
+{
+	struct ppc_aes_ctx *ctx = crypto_tfm_ctx(tfm);
+
+	spe_begin();
+	ppc_decrypt_aes(out, in, ctx->key_dec, ctx->rounds);
+	spe_end();
+}
+
+static int ppc_ecb_crypt(struct skcipher_request *req, bool enc)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct ppc_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct skcipher_walk walk;
+	unsigned int nbytes;
+	int err;
+
+	err = skcipher_walk_virt(&walk, req, false);
+
+	while ((nbytes = walk.nbytes) != 0) {
+		nbytes = min_t(unsigned int, nbytes, MAX_BYTES);
+		nbytes = round_down(nbytes, AES_BLOCK_SIZE);
+
+		spe_begin();
+		if (enc)
+			ppc_encrypt_ecb(walk.dst.virt.addr, walk.src.virt.addr,
+					ctx->key_enc, ctx->rounds, nbytes);
+		else
+			ppc_decrypt_ecb(walk.dst.virt.addr, walk.src.virt.addr,
+					ctx->key_dec, ctx->rounds, nbytes);
+		spe_end();
+
+		err = skcipher_walk_done(&walk, walk.nbytes - nbytes);
+	}
+
+	return err;
+}
+
+static int ppc_ecb_encrypt(struct skcipher_request *req)
+{
+	return ppc_ecb_crypt(req, true);
+}
+
+static int ppc_ecb_decrypt(struct skcipher_request *req)
+{
+	return ppc_ecb_crypt(req, false);
+}
+
+static int ppc_cbc_crypt(struct skcipher_request *req, bool enc)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct ppc_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct skcipher_walk walk;
+	unsigned int nbytes;
+	int err;
+
+	err = skcipher_walk_virt(&walk, req, false);
+
+	while ((nbytes = walk.nbytes) != 0) {
+		nbytes = min_t(unsigned int, nbytes, MAX_BYTES);
+		nbytes = round_down(nbytes, AES_BLOCK_SIZE);
+
+		spe_begin();
+		if (enc)
+			ppc_encrypt_cbc(walk.dst.virt.addr, walk.src.virt.addr,
+					ctx->key_enc, ctx->rounds, nbytes,
+					walk.iv);
+		else
+			ppc_decrypt_cbc(walk.dst.virt.addr, walk.src.virt.addr,
+					ctx->key_dec, ctx->rounds, nbytes,
+					walk.iv);
+		spe_end();
+
+		err = skcipher_walk_done(&walk, walk.nbytes - nbytes);
+	}
+
+	return err;
+}
+
+static int ppc_cbc_encrypt(struct skcipher_request *req)
+{
+	return ppc_cbc_crypt(req, true);
+}
+
+static int ppc_cbc_decrypt(struct skcipher_request *req)
+{
+	return ppc_cbc_crypt(req, false);
+}
+
+static int ppc_ctr_crypt(struct skcipher_request *req)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct ppc_aes_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct skcipher_walk walk;
+	unsigned int nbytes;
+	int err;
+
+	err = skcipher_walk_virt(&walk, req, false);
+
+	while ((nbytes = walk.nbytes) != 0) {
+		nbytes = min_t(unsigned int, nbytes, MAX_BYTES);
+		if (nbytes < walk.total)
+			nbytes = round_down(nbytes, AES_BLOCK_SIZE);
+
+		spe_begin();
+		ppc_crypt_ctr(walk.dst.virt.addr, walk.src.virt.addr,
+			      ctx->key_enc, ctx->rounds, nbytes, walk.iv);
+		spe_end();
+
+		err = skcipher_walk_done(&walk, walk.nbytes - nbytes);
+	}
+
+	return err;
+}
+
+static int ppc_xts_crypt(struct skcipher_request *req, bool enc)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct ppc_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+	struct skcipher_walk walk;
+	unsigned int nbytes;
+	int err;
+	u32 *twk;
+
+	err = skcipher_walk_virt(&walk, req, false);
+	twk = ctx->key_twk;
+
+	while ((nbytes = walk.nbytes) != 0) {
+		nbytes = min_t(unsigned int, nbytes, MAX_BYTES);
+		nbytes = round_down(nbytes, AES_BLOCK_SIZE);
+
+		spe_begin();
+		if (enc)
+			ppc_encrypt_xts(walk.dst.virt.addr, walk.src.virt.addr,
+					ctx->key_enc, ctx->rounds, nbytes,
+					walk.iv, twk);
+		else
+			ppc_decrypt_xts(walk.dst.virt.addr, walk.src.virt.addr,
+					ctx->key_dec, ctx->rounds, nbytes,
+					walk.iv, twk);
+		spe_end();
+
+		twk = NULL;
+		err = skcipher_walk_done(&walk, walk.nbytes - nbytes);
+	}
+
+	return err;
+}
+
+static int ppc_xts_encrypt(struct skcipher_request *req)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct ppc_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+	int tail = req->cryptlen % AES_BLOCK_SIZE;
+	int offset = req->cryptlen - tail - AES_BLOCK_SIZE;
+	struct skcipher_request subreq;
+	u8 b[2][AES_BLOCK_SIZE];
+	int err;
+
+	if (req->cryptlen < AES_BLOCK_SIZE)
+		return -EINVAL;
+
+	if (tail) {
+		subreq = *req;
+		skcipher_request_set_crypt(&subreq, req->src, req->dst,
+					   req->cryptlen - tail, req->iv);
+		req = &subreq;
+	}
+
+	err = ppc_xts_crypt(req, true);
+	if (err || !tail)
+		return err;
+
+	scatterwalk_map_and_copy(b[0], req->dst, offset, AES_BLOCK_SIZE, 0);
+	memcpy(b[1], b[0], tail);
+	scatterwalk_map_and_copy(b[0], req->src, offset + AES_BLOCK_SIZE, tail, 0);
+
+	spe_begin();
+	ppc_encrypt_xts(b[0], b[0], ctx->key_enc, ctx->rounds, AES_BLOCK_SIZE,
+			req->iv, NULL);
+	spe_end();
+
+	scatterwalk_map_and_copy(b[0], req->dst, offset, AES_BLOCK_SIZE + tail, 1);
+
+	return 0;
+}
+
+static int ppc_xts_decrypt(struct skcipher_request *req)
+{
+	struct crypto_skcipher *tfm = crypto_skcipher_reqtfm(req);
+	struct ppc_xts_ctx *ctx = crypto_skcipher_ctx(tfm);
+	int tail = req->cryptlen % AES_BLOCK_SIZE;
+	int offset = req->cryptlen - tail - AES_BLOCK_SIZE;
+	struct skcipher_request subreq;
+	u8 b[3][AES_BLOCK_SIZE];
+	le128 twk;
+	int err;
+
+	if (req->cryptlen < AES_BLOCK_SIZE)
+		return -EINVAL;
+
+	if (tail) {
+		subreq = *req;
+		skcipher_request_set_crypt(&subreq, req->src, req->dst,
+					   offset, req->iv);
+		req = &subreq;
+	}
+
+	err = ppc_xts_crypt(req, false);
+	if (err || !tail)
+		return err;
+
+	scatterwalk_map_and_copy(b[1], req->src, offset, AES_BLOCK_SIZE + tail, 0);
+
+	spe_begin();
+	if (!offset)
+		ppc_encrypt_ecb(req->iv, req->iv, ctx->key_twk, ctx->rounds,
+				AES_BLOCK_SIZE);
+
+	gf128mul_x_ble(&twk, (le128 *)req->iv);
+
+	ppc_decrypt_xts(b[1], b[1], ctx->key_dec, ctx->rounds, AES_BLOCK_SIZE,
+			(u8 *)&twk, NULL);
+	memcpy(b[0], b[2], tail);
+	memcpy(b[0] + tail, b[1] + tail, AES_BLOCK_SIZE - tail);
+	ppc_decrypt_xts(b[0], b[0], ctx->key_dec, ctx->rounds, AES_BLOCK_SIZE,
+			req->iv, NULL);
+	spe_end();
+
+	scatterwalk_map_and_copy(b[0], req->dst, offset, AES_BLOCK_SIZE + tail, 1);
+
+	return 0;
+}
+
+/*
+ * Algorithm definitions. Disabling alignment (cra_alignmask=0) was chosen
+ * because the e500 platform can handle unaligned reads/writes very efficiently.
+ * This improves IPsec thoughput by another few percent. Additionally we assume
+ * that AES context is always aligned to at least 8 bytes because it is created
+ * with kmalloc() in the crypto infrastructure
+ */
+
+static struct crypto_alg aes_cipher_alg = {
+	.cra_name		=	"aes",
+	.cra_driver_name	=	"aes-ppc-spe",
+	.cra_priority		=	300,
+	.cra_flags		=	CRYPTO_ALG_TYPE_CIPHER,
+	.cra_blocksize		=	AES_BLOCK_SIZE,
+	.cra_ctxsize		=	sizeof(struct ppc_aes_ctx),
+	.cra_alignmask		=	0,
+	.cra_module		=	THIS_MODULE,
+	.cra_u			=	{
+		.cipher = {
+			.cia_min_keysize	=	AES_MIN_KEY_SIZE,
+			.cia_max_keysize	=	AES_MAX_KEY_SIZE,
+			.cia_setkey		=	ppc_aes_setkey,
+			.cia_encrypt		=	ppc_aes_encrypt,
+			.cia_decrypt		=	ppc_aes_decrypt
+		}
+	}
+};
+
+static struct skcipher_alg aes_skcipher_algs[] = {
+	{
+		.base.cra_name		=	"ecb(aes)",
+		.base.cra_driver_name	=	"ecb-ppc-spe",
+		.base.cra_priority	=	300,
+		.base.cra_blocksize	=	AES_BLOCK_SIZE,
+		.base.cra_ctxsize	=	sizeof(struct ppc_aes_ctx),
+		.base.cra_module	=	THIS_MODULE,
+		.min_keysize		=	AES_MIN_KEY_SIZE,
+		.max_keysize		=	AES_MAX_KEY_SIZE,
+		.setkey			=	ppc_aes_setkey_skcipher,
+		.encrypt		=	ppc_ecb_encrypt,
+		.decrypt		=	ppc_ecb_decrypt,
+	}, {
+		.base.cra_name		=	"cbc(aes)",
+		.base.cra_driver_name	=	"cbc-ppc-spe",
+		.base.cra_priority	=	300,
+		.base.cra_blocksize	=	AES_BLOCK_SIZE,
+		.base.cra_ctxsize	=	sizeof(struct ppc_aes_ctx),
+		.base.cra_module	=	THIS_MODULE,
+		.min_keysize		=	AES_MIN_KEY_SIZE,
+		.max_keysize		=	AES_MAX_KEY_SIZE,
+		.ivsize			=	AES_BLOCK_SIZE,
+		.setkey			=	ppc_aes_setkey_skcipher,
+		.encrypt		=	ppc_cbc_encrypt,
+		.decrypt		=	ppc_cbc_decrypt,
+	}, {
+		.base.cra_name		=	"ctr(aes)",
+		.base.cra_driver_name	=	"ctr-ppc-spe",
+		.base.cra_priority	=	300,
+		.base.cra_blocksize	=	1,
+		.base.cra_ctxsize	=	sizeof(struct ppc_aes_ctx),
+		.base.cra_module	=	THIS_MODULE,
+		.min_keysize		=	AES_MIN_KEY_SIZE,
+		.max_keysize		=	AES_MAX_KEY_SIZE,
+		.ivsize			=	AES_BLOCK_SIZE,
+		.setkey			=	ppc_aes_setkey_skcipher,
+		.encrypt		=	ppc_ctr_crypt,
+		.decrypt		=	ppc_ctr_crypt,
+		.chunksize		=	AES_BLOCK_SIZE,
+	}, {
+		.base.cra_name		=	"xts(aes)",
+		.base.cra_driver_name	=	"xts-ppc-spe",
+		.base.cra_priority	=	300,
+		.base.cra_blocksize	=	AES_BLOCK_SIZE,
+		.base.cra_ctxsize	=	sizeof(struct ppc_xts_ctx),
+		.base.cra_module	=	THIS_MODULE,
+		.min_keysize		=	AES_MIN_KEY_SIZE * 2,
+		.max_keysize		=	AES_MAX_KEY_SIZE * 2,
+		.ivsize			=	AES_BLOCK_SIZE,
+		.setkey			=	ppc_xts_setkey,
+		.encrypt		=	ppc_xts_encrypt,
+		.decrypt		=	ppc_xts_decrypt,
+	}
+};
+
+static int __init ppc_aes_mod_init(void)
+{
+	int err;
+
+	err = crypto_register_alg(&aes_cipher_alg);
+	if (err)
+		return err;
+
+	err = crypto_register_skciphers(aes_skcipher_algs,
+					ARRAY_SIZE(aes_skcipher_algs));
+	if (err)
+		crypto_unregister_alg(&aes_cipher_alg);
+	return err;
+}
+
+static void __exit ppc_aes_mod_fini(void)
+{
+	crypto_unregister_alg(&aes_cipher_alg);
+	crypto_unregister_skciphers(aes_skcipher_algs,
+				    ARRAY_SIZE(aes_skcipher_algs));
+}
+
+module_init(ppc_aes_mod_init);
+module_exit(ppc_aes_mod_fini);
+
+MODULE_LICENSE("GPL");
+MODULE_DESCRIPTION("AES-ECB/CBC/CTR/XTS, SPE optimized");
+
+MODULE_ALIAS_CRYPTO("aes");
+MODULE_ALIAS_CRYPTO("ecb(aes)");
+MODULE_ALIAS_CRYPTO("cbc(aes)");
+MODULE_ALIAS_CRYPTO("ctr(aes)");
+MODULE_ALIAS_CRYPTO("xts(aes)");
+MODULE_ALIAS_CRYPTO("aes-ppc-spe");