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, 476 insertions, 0 deletions

diff --git a/arch/arm/mm/pmsa-v7.c b/arch/arm/mm/pmsa-v7.c
new file mode 100644
index 000000000..59d916ccd
--- /dev/null
+++ b/arch/arm/mm/pmsa-v7.c
@@ -0,0 +1,476 @@
+/*
+ * Based on linux/arch/arm/mm/nommu.c
+ *
+ * ARM PMSAv7 supporting functions.
+ */
+
+#include <linux/bitops.h>
+#include <linux/memblock.h>
+#include <linux/string.h>
+
+#include <asm/cacheflush.h>
+#include <asm/cp15.h>
+#include <asm/cputype.h>
+#include <asm/mpu.h>
+#include <asm/sections.h>
+
+#include "mm.h"
+
+struct region {
+	phys_addr_t base;
+	phys_addr_t size;
+	unsigned long subreg;
+};
+
+static struct region __initdata mem[MPU_MAX_REGIONS];
+#ifdef CONFIG_XIP_KERNEL
+static struct region __initdata xip[MPU_MAX_REGIONS];
+#endif
+
+static unsigned int __initdata mpu_min_region_order;
+static unsigned int __initdata mpu_max_regions;
+
+static int __init __mpu_min_region_order(void);
+static int __init __mpu_max_regions(void);
+
+#ifndef CONFIG_CPU_V7M
+
+#define DRBAR	__ACCESS_CP15(c6, 0, c1, 0)
+#define IRBAR	__ACCESS_CP15(c6, 0, c1, 1)
+#define DRSR	__ACCESS_CP15(c6, 0, c1, 2)
+#define IRSR	__ACCESS_CP15(c6, 0, c1, 3)
+#define DRACR	__ACCESS_CP15(c6, 0, c1, 4)
+#define IRACR	__ACCESS_CP15(c6, 0, c1, 5)
+#define RNGNR	__ACCESS_CP15(c6, 0, c2, 0)
+
+/* Region number */
+static inline void rgnr_write(u32 v)
+{
+	write_sysreg(v, RNGNR);
+}
+
+/* Data-side / unified region attributes */
+
+/* Region access control register */
+static inline void dracr_write(u32 v)
+{
+	write_sysreg(v, DRACR);
+}
+
+/* Region size register */
+static inline void drsr_write(u32 v)
+{
+	write_sysreg(v, DRSR);
+}
+
+/* Region base address register */
+static inline void drbar_write(u32 v)
+{
+	write_sysreg(v, DRBAR);
+}
+
+static inline u32 drbar_read(void)
+{
+	return read_sysreg(DRBAR);
+}
+/* Optional instruction-side region attributes */
+
+/* I-side Region access control register */
+static inline void iracr_write(u32 v)
+{
+	write_sysreg(v, IRACR);
+}
+
+/* I-side Region size register */
+static inline void irsr_write(u32 v)
+{
+	write_sysreg(v, IRSR);
+}
+
+/* I-side Region base address register */
+static inline void irbar_write(u32 v)
+{
+	write_sysreg(v, IRBAR);
+}
+
+static inline u32 irbar_read(void)
+{
+	return read_sysreg(IRBAR);
+}
+
+#else
+
+static inline void rgnr_write(u32 v)
+{
+	writel_relaxed(v, BASEADDR_V7M_SCB + PMSAv7_RNR);
+}
+
+/* Data-side / unified region attributes */
+
+/* Region access control register */
+static inline void dracr_write(u32 v)
+{
+	u32 rsr = readl_relaxed(BASEADDR_V7M_SCB + PMSAv7_RASR) & GENMASK(15, 0);
+
+	writel_relaxed((v << 16) | rsr, BASEADDR_V7M_SCB + PMSAv7_RASR);
+}
+
+/* Region size register */
+static inline void drsr_write(u32 v)
+{
+	u32 racr = readl_relaxed(BASEADDR_V7M_SCB + PMSAv7_RASR) & GENMASK(31, 16);
+
+	writel_relaxed(v | racr, BASEADDR_V7M_SCB + PMSAv7_RASR);
+}
+
+/* Region base address register */
+static inline void drbar_write(u32 v)
+{
+	writel_relaxed(v, BASEADDR_V7M_SCB + PMSAv7_RBAR);
+}
+
+static inline u32 drbar_read(void)
+{
+	return readl_relaxed(BASEADDR_V7M_SCB + PMSAv7_RBAR);
+}
+
+/* ARMv7-M only supports a unified MPU, so I-side operations are nop */
+
+static inline void iracr_write(u32 v) {}
+static inline void irsr_write(u32 v) {}
+static inline void irbar_write(u32 v) {}
+static inline unsigned long irbar_read(void) {return 0;}
+
+#endif
+
+static bool __init try_split_region(phys_addr_t base, phys_addr_t size, struct region *region)
+{
+	unsigned long  subreg, bslots, sslots;
+	phys_addr_t abase = base & ~(size - 1);
+	phys_addr_t asize = base + size - abase;
+	phys_addr_t p2size = 1 << __fls(asize);
+	phys_addr_t bdiff, sdiff;
+
+	if (p2size != asize)
+		p2size *= 2;
+
+	bdiff = base - abase;
+	sdiff = p2size - asize;
+	subreg = p2size / PMSAv7_NR_SUBREGS;
+
+	if ((bdiff % subreg) || (sdiff % subreg))
+		return false;
+
+	bslots = bdiff / subreg;
+	sslots = sdiff / subreg;
+
+	if (bslots || sslots) {
+		int i;
+
+		if (subreg < PMSAv7_MIN_SUBREG_SIZE)
+			return false;
+
+		if (bslots + sslots > PMSAv7_NR_SUBREGS)
+			return false;
+
+		for (i = 0; i < bslots; i++)
+			_set_bit(i, &region->subreg);
+
+		for (i = 1; i <= sslots; i++)
+			_set_bit(PMSAv7_NR_SUBREGS - i, &region->subreg);
+	}
+
+	region->base = abase;
+	region->size = p2size;
+
+	return true;
+}
+
+static int __init allocate_region(phys_addr_t base, phys_addr_t size,
+				  unsigned int limit, struct region *regions)
+{
+	int count = 0;
+	phys_addr_t diff = size;
+	int attempts = MPU_MAX_REGIONS;
+
+	while (diff) {
+		/* Try cover region as is (maybe with help of subregions) */
+		if (try_split_region(base, size, &regions[count])) {
+			count++;
+			base += size;
+			diff -= size;
+			size = diff;
+		} else {
+			/*
+			 * Maximum aligned region might overflow phys_addr_t
+			 * if "base" is 0. Hence we keep everything below 4G
+			 * until we take the smaller of the aligned region
+			 * size ("asize") and rounded region size ("p2size"),
+			 * one of which is guaranteed to be smaller than the
+			 * maximum physical address.
+			 */
+			phys_addr_t asize = (base - 1) ^ base;
+			phys_addr_t p2size = (1 <<  __fls(diff)) - 1;
+
+			size = asize < p2size ? asize + 1 : p2size + 1;
+		}
+
+		if (count > limit)
+			break;
+
+		if (!attempts)
+			break;
+
+		attempts--;
+	}
+
+	return count;
+}
+
+/* MPU initialisation functions */
+void __init pmsav7_adjust_lowmem_bounds(void)
+{
+	phys_addr_t  specified_mem_size = 0, total_mem_size = 0;
+	phys_addr_t mem_start;
+	phys_addr_t mem_end;
+	phys_addr_t reg_start, reg_end;
+	unsigned int mem_max_regions;
+	bool first = true;
+	int num;
+	u64 i;
+
+	/* Free-up PMSAv7_PROBE_REGION */
+	mpu_min_region_order = __mpu_min_region_order();
+
+	/* How many regions are supported */
+	mpu_max_regions = __mpu_max_regions();
+
+	mem_max_regions = min((unsigned int)MPU_MAX_REGIONS, mpu_max_regions);
+
+	/* We need to keep one slot for background region */
+	mem_max_regions--;
+
+#ifndef CONFIG_CPU_V7M
+	/* ... and one for vectors */
+	mem_max_regions--;
+#endif
+
+#ifdef CONFIG_XIP_KERNEL
+	/* plus some regions to cover XIP ROM */
+	num = allocate_region(CONFIG_XIP_PHYS_ADDR, __pa(_exiprom) - CONFIG_XIP_PHYS_ADDR,
+			      mem_max_regions, xip);
+
+	mem_max_regions -= num;
+#endif
+
+	for_each_mem_range(i, &reg_start, &reg_end) {
+		if (first) {
+			phys_addr_t phys_offset = PHYS_OFFSET;
+
+			/*
+			 * Initially only use memory continuous from
+			 * PHYS_OFFSET */
+			if (reg_start != phys_offset)
+				panic("First memory bank must be contiguous from PHYS_OFFSET");
+
+			mem_start = reg_start;
+			mem_end = reg_end;
+			specified_mem_size = mem_end - mem_start;
+			first = false;
+		} else {
+			/*
+			 * memblock auto merges contiguous blocks, remove
+			 * all blocks afterwards in one go (we can't remove
+			 * blocks separately while iterating)
+			 */
+			pr_notice("Ignoring RAM after %pa, memory at %pa ignored\n",
+				  &mem_end, &reg_start);
+			memblock_remove(reg_start, 0 - reg_start);
+			break;
+		}
+	}
+
+	memset(mem, 0, sizeof(mem));
+	num = allocate_region(mem_start, specified_mem_size, mem_max_regions, mem);
+
+	for (i = 0; i < num; i++) {
+		unsigned long  subreg = mem[i].size / PMSAv7_NR_SUBREGS;
+
+		total_mem_size += mem[i].size - subreg * hweight_long(mem[i].subreg);
+
+		pr_debug("MPU: base %pa size %pa disable subregions: %*pbl\n",
+			 &mem[i].base, &mem[i].size, PMSAv7_NR_SUBREGS, &mem[i].subreg);
+	}
+
+	if (total_mem_size != specified_mem_size) {
+		pr_warn("Truncating memory from %pa to %pa (MPU region constraints)",
+				&specified_mem_size, &total_mem_size);
+		memblock_remove(mem_start + total_mem_size,
+				specified_mem_size - total_mem_size);
+	}
+}
+
+static int __init __mpu_max_regions(void)
+{
+	/*
+	 * We don't support a different number of I/D side regions so if we
+	 * have separate instruction and data memory maps then return
+	 * whichever side has a smaller number of supported regions.
+	 */
+	u32 dregions, iregions, mpuir;
+
+	mpuir = read_cpuid_mputype();
+
+	dregions = iregions = (mpuir & MPUIR_DREGION_SZMASK) >> MPUIR_DREGION;
+
+	/* Check for separate d-side and i-side memory maps */
+	if (mpuir & MPUIR_nU)
+		iregions = (mpuir & MPUIR_IREGION_SZMASK) >> MPUIR_IREGION;
+
+	/* Use the smallest of the two maxima */
+	return min(dregions, iregions);
+}
+
+static int __init mpu_iside_independent(void)
+{
+	/* MPUIR.nU specifies whether there is *not* a unified memory map */
+	return read_cpuid_mputype() & MPUIR_nU;
+}
+
+static int __init __mpu_min_region_order(void)
+{
+	u32 drbar_result, irbar_result;
+
+	/* We've kept a region free for this probing */
+	rgnr_write(PMSAv7_PROBE_REGION);
+	isb();
+	/*
+	 * As per ARM ARM, write 0xFFFFFFFC to DRBAR to find the minimum
+	 * region order
+	*/
+	drbar_write(0xFFFFFFFC);
+	drbar_result = irbar_result = drbar_read();
+	drbar_write(0x0);
+	/* If the MPU is non-unified, we use the larger of the two minima*/
+	if (mpu_iside_independent()) {
+		irbar_write(0xFFFFFFFC);
+		irbar_result = irbar_read();
+		irbar_write(0x0);
+	}
+	isb(); /* Ensure that MPU region operations have completed */
+	/* Return whichever result is larger */
+
+	return __ffs(max(drbar_result, irbar_result));
+}
+
+static int __init mpu_setup_region(unsigned int number, phys_addr_t start,
+				   unsigned int size_order, unsigned int properties,
+				   unsigned int subregions, bool need_flush)
+{
+	u32 size_data;
+
+	/* We kept a region free for probing resolution of MPU regions*/
+	if (number > mpu_max_regions
+	    || number >= MPU_MAX_REGIONS)
+		return -ENOENT;
+
+	if (size_order > 32)
+		return -ENOMEM;
+
+	if (size_order < mpu_min_region_order)
+		return -ENOMEM;
+
+	/* Writing N to bits 5:1 (RSR_SZ)  specifies region size 2^N+1 */
+	size_data = ((size_order - 1) << PMSAv7_RSR_SZ) | 1 << PMSAv7_RSR_EN;
+	size_data |= subregions << PMSAv7_RSR_SD;
+
+	if (need_flush)
+		flush_cache_all();
+
+	dsb(); /* Ensure all previous data accesses occur with old mappings */
+	rgnr_write(number);
+	isb();
+	drbar_write(start);
+	dracr_write(properties);
+	isb(); /* Propagate properties before enabling region */
+	drsr_write(size_data);
+
+	/* Check for independent I-side registers */
+	if (mpu_iside_independent()) {
+		irbar_write(start);
+		iracr_write(properties);
+		isb();
+		irsr_write(size_data);
+	}
+	isb();
+
+	/* Store region info (we treat i/d side the same, so only store d) */
+	mpu_rgn_info.rgns[number].dracr = properties;
+	mpu_rgn_info.rgns[number].drbar = start;
+	mpu_rgn_info.rgns[number].drsr = size_data;
+
+	mpu_rgn_info.used++;
+
+	return 0;
+}
+
+/*
+* Set up default MPU regions, doing nothing if there is no MPU
+*/
+void __init pmsav7_setup(void)
+{
+	int i, region = 0, err = 0;
+
+	/* Setup MPU (order is important) */
+
+	/* Background */
+	err |= mpu_setup_region(region++, 0, 32,
+				PMSAv7_ACR_XN | PMSAv7_RGN_STRONGLY_ORDERED | PMSAv7_AP_PL1RW_PL0RW,
+				0, false);
+
+#ifdef CONFIG_XIP_KERNEL
+	/* ROM */
+	for (i = 0; i < ARRAY_SIZE(xip); i++) {
+		/*
+                 * In case we overwrite RAM region we set earlier in
+                 * head-nommu.S (which is cachable) all subsequent
+                 * data access till we setup RAM bellow would be done
+                 * with BG region (which is uncachable), thus we need
+                 * to clean and invalidate cache.
+		 */
+		bool need_flush = region == PMSAv7_RAM_REGION;
+
+		if (!xip[i].size)
+			continue;
+
+		err |= mpu_setup_region(region++, xip[i].base, ilog2(xip[i].size),
+					PMSAv7_AP_PL1RO_PL0NA | PMSAv7_RGN_NORMAL,
+					xip[i].subreg, need_flush);
+	}
+#endif
+
+	/* RAM */
+	for (i = 0; i < ARRAY_SIZE(mem); i++) {
+		if (!mem[i].size)
+			continue;
+
+		err |= mpu_setup_region(region++, mem[i].base, ilog2(mem[i].size),
+					PMSAv7_AP_PL1RW_PL0RW | PMSAv7_RGN_NORMAL,
+					mem[i].subreg, false);
+	}
+
+	/* Vectors */
+#ifndef CONFIG_CPU_V7M
+	err |= mpu_setup_region(region++, vectors_base, ilog2(2 * PAGE_SIZE),
+				PMSAv7_AP_PL1RW_PL0NA | PMSAv7_RGN_NORMAL,
+				0, false);
+#endif
+	if (err) {
+		panic("MPU region initialization failure! %d", err);
+	} else {
+		pr_info("Using ARMv7 PMSA Compliant MPU. "
+			 "Region independence: %s, Used %d of %d regions\n",
+			mpu_iside_independent() ? "Yes" : "No",
+			mpu_rgn_info.used, mpu_max_regions);
+	}
+}