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, 739 insertions, 0 deletions

diff --git a/tools/testing/cxl/test/mem.c b/tools/testing/cxl/test/mem.c
new file mode 100644
index 000000000..5e4ecd93f
--- /dev/null
+++ b/tools/testing/cxl/test/mem.c
@@ -0,0 +1,739 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// Copyright(c) 2021 Intel Corporation. All rights reserved.
+
+#include <linux/platform_device.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/sizes.h>
+#include <linux/bits.h>
+#include <cxlmem.h>
+
+#define LSA_SIZE SZ_128K
+#define DEV_SIZE SZ_2G
+#define EFFECT(x) (1U << x)
+
+static struct cxl_cel_entry mock_cel[] = {
+	{
+		.opcode = cpu_to_le16(CXL_MBOX_OP_GET_SUPPORTED_LOGS),
+		.effect = cpu_to_le16(0),
+	},
+	{
+		.opcode = cpu_to_le16(CXL_MBOX_OP_IDENTIFY),
+		.effect = cpu_to_le16(0),
+	},
+	{
+		.opcode = cpu_to_le16(CXL_MBOX_OP_GET_LSA),
+		.effect = cpu_to_le16(0),
+	},
+	{
+		.opcode = cpu_to_le16(CXL_MBOX_OP_GET_PARTITION_INFO),
+		.effect = cpu_to_le16(0),
+	},
+	{
+		.opcode = cpu_to_le16(CXL_MBOX_OP_SET_LSA),
+		.effect = cpu_to_le16(EFFECT(1) | EFFECT(2)),
+	},
+	{
+		.opcode = cpu_to_le16(CXL_MBOX_OP_GET_HEALTH_INFO),
+		.effect = cpu_to_le16(0),
+	},
+};
+
+/* See CXL 2.0 Table 181 Get Health Info Output Payload */
+struct cxl_mbox_health_info {
+	u8 health_status;
+	u8 media_status;
+	u8 ext_status;
+	u8 life_used;
+	__le16 temperature;
+	__le32 dirty_shutdowns;
+	__le32 volatile_errors;
+	__le32 pmem_errors;
+} __packed;
+
+static struct {
+	struct cxl_mbox_get_supported_logs gsl;
+	struct cxl_gsl_entry entry;
+} mock_gsl_payload = {
+	.gsl = {
+		.entries = cpu_to_le16(1),
+	},
+	.entry = {
+		.uuid = DEFINE_CXL_CEL_UUID,
+		.size = cpu_to_le32(sizeof(mock_cel)),
+	},
+};
+
+#define PASS_TRY_LIMIT 3
+
+struct cxl_mockmem_data {
+	void *lsa;
+	u32 security_state;
+	u8 user_pass[NVDIMM_PASSPHRASE_LEN];
+	u8 master_pass[NVDIMM_PASSPHRASE_LEN];
+	int user_limit;
+	int master_limit;
+
+};
+
+static int mock_gsl(struct cxl_mbox_cmd *cmd)
+{
+	if (cmd->size_out < sizeof(mock_gsl_payload))
+		return -EINVAL;
+
+	memcpy(cmd->payload_out, &mock_gsl_payload, sizeof(mock_gsl_payload));
+	cmd->size_out = sizeof(mock_gsl_payload);
+
+	return 0;
+}
+
+static int mock_get_log(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mbox_get_log *gl = cmd->payload_in;
+	u32 offset = le32_to_cpu(gl->offset);
+	u32 length = le32_to_cpu(gl->length);
+	uuid_t uuid = DEFINE_CXL_CEL_UUID;
+	void *data = &mock_cel;
+
+	if (cmd->size_in < sizeof(*gl))
+		return -EINVAL;
+	if (length > cxlds->payload_size)
+		return -EINVAL;
+	if (offset + length > sizeof(mock_cel))
+		return -EINVAL;
+	if (!uuid_equal(&gl->uuid, &uuid))
+		return -EINVAL;
+	if (length > cmd->size_out)
+		return -EINVAL;
+
+	memcpy(cmd->payload_out, data + offset, length);
+
+	return 0;
+}
+
+static int mock_rcd_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mbox_identify id = {
+		.fw_revision = { "mock fw v1 " },
+		.total_capacity =
+			cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER),
+		.volatile_capacity =
+			cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER),
+	};
+
+	if (cmd->size_out < sizeof(id))
+		return -EINVAL;
+
+	memcpy(cmd->payload_out, &id, sizeof(id));
+
+	return 0;
+}
+
+static int mock_id(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mbox_identify id = {
+		.fw_revision = { "mock fw v1 " },
+		.lsa_size = cpu_to_le32(LSA_SIZE),
+		.partition_align =
+			cpu_to_le64(SZ_256M / CXL_CAPACITY_MULTIPLIER),
+		.total_capacity =
+			cpu_to_le64(DEV_SIZE / CXL_CAPACITY_MULTIPLIER),
+	};
+
+	if (cmd->size_out < sizeof(id))
+		return -EINVAL;
+
+	memcpy(cmd->payload_out, &id, sizeof(id));
+
+	return 0;
+}
+
+static int mock_partition_info(struct cxl_dev_state *cxlds,
+			       struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mbox_get_partition_info pi = {
+		.active_volatile_cap =
+			cpu_to_le64(DEV_SIZE / 2 / CXL_CAPACITY_MULTIPLIER),
+		.active_persistent_cap =
+			cpu_to_le64(DEV_SIZE / 2 / CXL_CAPACITY_MULTIPLIER),
+	};
+
+	if (cmd->size_out < sizeof(pi))
+		return -EINVAL;
+
+	memcpy(cmd->payload_out, &pi, sizeof(pi));
+
+	return 0;
+}
+
+static int mock_get_security_state(struct cxl_dev_state *cxlds,
+				   struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+
+	if (cmd->size_in)
+		return -EINVAL;
+
+	if (cmd->size_out != sizeof(u32))
+		return -EINVAL;
+
+	memcpy(cmd->payload_out, &mdata->security_state, sizeof(u32));
+
+	return 0;
+}
+
+static void master_plimit_check(struct cxl_mockmem_data *mdata)
+{
+	if (mdata->master_limit == PASS_TRY_LIMIT)
+		return;
+	mdata->master_limit++;
+	if (mdata->master_limit == PASS_TRY_LIMIT)
+		mdata->security_state |= CXL_PMEM_SEC_STATE_MASTER_PLIMIT;
+}
+
+static void user_plimit_check(struct cxl_mockmem_data *mdata)
+{
+	if (mdata->user_limit == PASS_TRY_LIMIT)
+		return;
+	mdata->user_limit++;
+	if (mdata->user_limit == PASS_TRY_LIMIT)
+		mdata->security_state |= CXL_PMEM_SEC_STATE_USER_PLIMIT;
+}
+
+static int mock_set_passphrase(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+	struct cxl_set_pass *set_pass;
+
+	if (cmd->size_in != sizeof(*set_pass))
+		return -EINVAL;
+
+	if (cmd->size_out != 0)
+		return -EINVAL;
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	set_pass = cmd->payload_in;
+	switch (set_pass->type) {
+	case CXL_PMEM_SEC_PASS_MASTER:
+		if (mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PLIMIT) {
+			cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+			return -ENXIO;
+		}
+		/*
+		 * CXL spec rev3.0 8.2.9.8.6.2, The master pasphrase shall only be set in
+		 * the security disabled state when the user passphrase is not set.
+		 */
+		if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET) {
+			cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+			return -ENXIO;
+		}
+		if (memcmp(mdata->master_pass, set_pass->old_pass, NVDIMM_PASSPHRASE_LEN)) {
+			master_plimit_check(mdata);
+			cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE;
+			return -ENXIO;
+		}
+		memcpy(mdata->master_pass, set_pass->new_pass, NVDIMM_PASSPHRASE_LEN);
+		mdata->security_state |= CXL_PMEM_SEC_STATE_MASTER_PASS_SET;
+		return 0;
+
+	case CXL_PMEM_SEC_PASS_USER:
+		if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PLIMIT) {
+			cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+			return -ENXIO;
+		}
+		if (memcmp(mdata->user_pass, set_pass->old_pass, NVDIMM_PASSPHRASE_LEN)) {
+			user_plimit_check(mdata);
+			cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE;
+			return -ENXIO;
+		}
+		memcpy(mdata->user_pass, set_pass->new_pass, NVDIMM_PASSPHRASE_LEN);
+		mdata->security_state |= CXL_PMEM_SEC_STATE_USER_PASS_SET;
+		return 0;
+
+	default:
+		cmd->return_code = CXL_MBOX_CMD_RC_INPUT;
+	}
+	return -EINVAL;
+}
+
+static int mock_disable_passphrase(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+	struct cxl_disable_pass *dis_pass;
+
+	if (cmd->size_in != sizeof(*dis_pass))
+		return -EINVAL;
+
+	if (cmd->size_out != 0)
+		return -EINVAL;
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	dis_pass = cmd->payload_in;
+	switch (dis_pass->type) {
+	case CXL_PMEM_SEC_PASS_MASTER:
+		if (mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PLIMIT) {
+			cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+			return -ENXIO;
+		}
+
+		if (!(mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PASS_SET)) {
+			cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+			return -ENXIO;
+		}
+
+		if (memcmp(dis_pass->pass, mdata->master_pass, NVDIMM_PASSPHRASE_LEN)) {
+			master_plimit_check(mdata);
+			cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE;
+			return -ENXIO;
+		}
+
+		mdata->master_limit = 0;
+		memset(mdata->master_pass, 0, NVDIMM_PASSPHRASE_LEN);
+		mdata->security_state &= ~CXL_PMEM_SEC_STATE_MASTER_PASS_SET;
+		return 0;
+
+	case CXL_PMEM_SEC_PASS_USER:
+		if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PLIMIT) {
+			cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+			return -ENXIO;
+		}
+
+		if (!(mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET)) {
+			cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+			return -ENXIO;
+		}
+
+		if (memcmp(dis_pass->pass, mdata->user_pass, NVDIMM_PASSPHRASE_LEN)) {
+			user_plimit_check(mdata);
+			cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE;
+			return -ENXIO;
+		}
+
+		mdata->user_limit = 0;
+		memset(mdata->user_pass, 0, NVDIMM_PASSPHRASE_LEN);
+		mdata->security_state &= ~(CXL_PMEM_SEC_STATE_USER_PASS_SET |
+					   CXL_PMEM_SEC_STATE_LOCKED);
+		return 0;
+
+	default:
+		cmd->return_code = CXL_MBOX_CMD_RC_INPUT;
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int mock_freeze_security(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+
+	if (cmd->size_in != 0)
+		return -EINVAL;
+
+	if (cmd->size_out != 0)
+		return -EINVAL;
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN)
+		return 0;
+
+	mdata->security_state |= CXL_PMEM_SEC_STATE_FROZEN;
+	return 0;
+}
+
+static int mock_unlock_security(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+
+	if (cmd->size_in != NVDIMM_PASSPHRASE_LEN)
+		return -EINVAL;
+
+	if (cmd->size_out != 0)
+		return -EINVAL;
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	if (!(mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET)) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PLIMIT) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	if (!(mdata->security_state & CXL_PMEM_SEC_STATE_LOCKED)) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	if (memcmp(cmd->payload_in, mdata->user_pass, NVDIMM_PASSPHRASE_LEN)) {
+		if (++mdata->user_limit == PASS_TRY_LIMIT)
+			mdata->security_state |= CXL_PMEM_SEC_STATE_USER_PLIMIT;
+		cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE;
+		return -ENXIO;
+	}
+
+	mdata->user_limit = 0;
+	mdata->security_state &= ~CXL_PMEM_SEC_STATE_LOCKED;
+	return 0;
+}
+
+static int mock_passphrase_secure_erase(struct cxl_dev_state *cxlds,
+					struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+	struct cxl_pass_erase *erase;
+
+	if (cmd->size_in != sizeof(*erase))
+		return -EINVAL;
+
+	if (cmd->size_out != 0)
+		return -EINVAL;
+
+	erase = cmd->payload_in;
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_FROZEN) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PLIMIT &&
+	    erase->type == CXL_PMEM_SEC_PASS_USER) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	if (mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PLIMIT &&
+	    erase->type == CXL_PMEM_SEC_PASS_MASTER) {
+		cmd->return_code = CXL_MBOX_CMD_RC_SECURITY;
+		return -ENXIO;
+	}
+
+	switch (erase->type) {
+	case CXL_PMEM_SEC_PASS_MASTER:
+		/*
+		 * The spec does not clearly define the behavior of the scenario
+		 * where a master passphrase is passed in while the master
+		 * passphrase is not set and user passphrase is not set. The
+		 * code will take the assumption that it will behave the same
+		 * as a CXL secure erase command without passphrase (0x4401).
+		 */
+		if (mdata->security_state & CXL_PMEM_SEC_STATE_MASTER_PASS_SET) {
+			if (memcmp(mdata->master_pass, erase->pass,
+				   NVDIMM_PASSPHRASE_LEN)) {
+				master_plimit_check(mdata);
+				cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE;
+				return -ENXIO;
+			}
+			mdata->master_limit = 0;
+			mdata->user_limit = 0;
+			mdata->security_state &= ~CXL_PMEM_SEC_STATE_USER_PASS_SET;
+			memset(mdata->user_pass, 0, NVDIMM_PASSPHRASE_LEN);
+			mdata->security_state &= ~CXL_PMEM_SEC_STATE_LOCKED;
+		} else {
+			/*
+			 * CXL rev3 8.2.9.8.6.3 Disable Passphrase
+			 * When master passphrase is disabled, the device shall
+			 * return Invalid Input for the Passphrase Secure Erase
+			 * command with master passphrase.
+			 */
+			return -EINVAL;
+		}
+		/* Scramble encryption keys so that data is effectively erased */
+		break;
+	case CXL_PMEM_SEC_PASS_USER:
+		/*
+		 * The spec does not clearly define the behavior of the scenario
+		 * where a user passphrase is passed in while the user
+		 * passphrase is not set. The code will take the assumption that
+		 * it will behave the same as a CXL secure erase command without
+		 * passphrase (0x4401).
+		 */
+		if (mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET) {
+			if (memcmp(mdata->user_pass, erase->pass,
+				   NVDIMM_PASSPHRASE_LEN)) {
+				user_plimit_check(mdata);
+				cmd->return_code = CXL_MBOX_CMD_RC_PASSPHRASE;
+				return -ENXIO;
+			}
+			mdata->user_limit = 0;
+			mdata->security_state &= ~CXL_PMEM_SEC_STATE_USER_PASS_SET;
+			memset(mdata->user_pass, 0, NVDIMM_PASSPHRASE_LEN);
+		}
+
+		/*
+		 * CXL rev3 Table 8-118
+		 * If user passphrase is not set or supported by device, current
+		 * passphrase value is ignored. Will make the assumption that
+		 * the operation will proceed as secure erase w/o passphrase
+		 * since spec is not explicit.
+		 */
+
+		/* Scramble encryption keys so that data is effectively erased */
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int mock_get_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mbox_get_lsa *get_lsa = cmd->payload_in;
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+	void *lsa = mdata->lsa;
+	u32 offset, length;
+
+	if (sizeof(*get_lsa) > cmd->size_in)
+		return -EINVAL;
+	offset = le32_to_cpu(get_lsa->offset);
+	length = le32_to_cpu(get_lsa->length);
+	if (offset + length > LSA_SIZE)
+		return -EINVAL;
+	if (length > cmd->size_out)
+		return -EINVAL;
+
+	memcpy(cmd->payload_out, lsa + offset, length);
+	return 0;
+}
+
+static int mock_set_lsa(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mbox_set_lsa *set_lsa = cmd->payload_in;
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(cxlds->dev);
+	void *lsa = mdata->lsa;
+	u32 offset, length;
+
+	if (sizeof(*set_lsa) > cmd->size_in)
+		return -EINVAL;
+	offset = le32_to_cpu(set_lsa->offset);
+	length = cmd->size_in - sizeof(*set_lsa);
+	if (offset + length > LSA_SIZE)
+		return -EINVAL;
+
+	memcpy(lsa + offset, &set_lsa->data[0], length);
+	return 0;
+}
+
+static int mock_health_info(struct cxl_dev_state *cxlds,
+			    struct cxl_mbox_cmd *cmd)
+{
+	struct cxl_mbox_health_info health_info = {
+		/* set flags for maint needed, perf degraded, hw replacement */
+		.health_status = 0x7,
+		/* set media status to "All Data Lost" */
+		.media_status = 0x3,
+		/*
+		 * set ext_status flags for:
+		 *  ext_life_used: normal,
+		 *  ext_temperature: critical,
+		 *  ext_corrected_volatile: warning,
+		 *  ext_corrected_persistent: normal,
+		 */
+		.ext_status = 0x18,
+		.life_used = 15,
+		.temperature = cpu_to_le16(25),
+		.dirty_shutdowns = cpu_to_le32(10),
+		.volatile_errors = cpu_to_le32(20),
+		.pmem_errors = cpu_to_le32(30),
+	};
+
+	if (cmd->size_out < sizeof(health_info))
+		return -EINVAL;
+
+	memcpy(cmd->payload_out, &health_info, sizeof(health_info));
+	return 0;
+}
+
+static int cxl_mock_mbox_send(struct cxl_dev_state *cxlds, struct cxl_mbox_cmd *cmd)
+{
+	struct device *dev = cxlds->dev;
+	int rc = -EIO;
+
+	switch (cmd->opcode) {
+	case CXL_MBOX_OP_GET_SUPPORTED_LOGS:
+		rc = mock_gsl(cmd);
+		break;
+	case CXL_MBOX_OP_GET_LOG:
+		rc = mock_get_log(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_IDENTIFY:
+		if (cxlds->rcd)
+			rc = mock_rcd_id(cxlds, cmd);
+		else
+			rc = mock_id(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_GET_LSA:
+		rc = mock_get_lsa(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_GET_PARTITION_INFO:
+		rc = mock_partition_info(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_SET_LSA:
+		rc = mock_set_lsa(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_GET_HEALTH_INFO:
+		rc = mock_health_info(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_GET_SECURITY_STATE:
+		rc = mock_get_security_state(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_SET_PASSPHRASE:
+		rc = mock_set_passphrase(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_DISABLE_PASSPHRASE:
+		rc = mock_disable_passphrase(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_FREEZE_SECURITY:
+		rc = mock_freeze_security(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_UNLOCK:
+		rc = mock_unlock_security(cxlds, cmd);
+		break;
+	case CXL_MBOX_OP_PASSPHRASE_SECURE_ERASE:
+		rc = mock_passphrase_secure_erase(cxlds, cmd);
+		break;
+	default:
+		break;
+	}
+
+	dev_dbg(dev, "opcode: %#x sz_in: %zd sz_out: %zd rc: %d\n", cmd->opcode,
+		cmd->size_in, cmd->size_out, rc);
+
+	return rc;
+}
+
+static void label_area_release(void *lsa)
+{
+	vfree(lsa);
+}
+
+static bool is_rcd(struct platform_device *pdev)
+{
+	const struct platform_device_id *id = platform_get_device_id(pdev);
+
+	return !!id->driver_data;
+}
+
+static int cxl_mock_mem_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct cxl_memdev *cxlmd;
+	struct cxl_dev_state *cxlds;
+	struct cxl_mockmem_data *mdata;
+	int rc;
+
+	mdata = devm_kzalloc(dev, sizeof(*mdata), GFP_KERNEL);
+	if (!mdata)
+		return -ENOMEM;
+	dev_set_drvdata(dev, mdata);
+
+	mdata->lsa = vmalloc(LSA_SIZE);
+	if (!mdata->lsa)
+		return -ENOMEM;
+	rc = devm_add_action_or_reset(dev, label_area_release, mdata->lsa);
+	if (rc)
+		return rc;
+
+	cxlds = cxl_dev_state_create(dev);
+	if (IS_ERR(cxlds))
+		return PTR_ERR(cxlds);
+
+	cxlds->serial = pdev->id;
+	cxlds->mbox_send = cxl_mock_mbox_send;
+	cxlds->payload_size = SZ_4K;
+	if (is_rcd(pdev)) {
+		cxlds->rcd = true;
+		cxlds->component_reg_phys = CXL_RESOURCE_NONE;
+	}
+
+	rc = cxl_enumerate_cmds(cxlds);
+	if (rc)
+		return rc;
+
+	rc = cxl_dev_state_identify(cxlds);
+	if (rc)
+		return rc;
+
+	rc = cxl_mem_create_range_info(cxlds);
+	if (rc)
+		return rc;
+
+	cxlmd = devm_cxl_add_memdev(cxlds);
+	if (IS_ERR(cxlmd))
+		return PTR_ERR(cxlmd);
+
+	return 0;
+}
+
+static ssize_t security_lock_show(struct device *dev,
+				  struct device_attribute *attr, char *buf)
+{
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(dev);
+
+	return sysfs_emit(buf, "%u\n",
+			  !!(mdata->security_state & CXL_PMEM_SEC_STATE_LOCKED));
+}
+
+static ssize_t security_lock_store(struct device *dev, struct device_attribute *attr,
+				   const char *buf, size_t count)
+{
+	struct cxl_mockmem_data *mdata = dev_get_drvdata(dev);
+	u32 mask = CXL_PMEM_SEC_STATE_FROZEN | CXL_PMEM_SEC_STATE_USER_PLIMIT |
+		   CXL_PMEM_SEC_STATE_MASTER_PLIMIT;
+	int val;
+
+	if (kstrtoint(buf, 0, &val) < 0)
+		return -EINVAL;
+
+	if (val == 1) {
+		if (!(mdata->security_state & CXL_PMEM_SEC_STATE_USER_PASS_SET))
+			return -ENXIO;
+		mdata->security_state |= CXL_PMEM_SEC_STATE_LOCKED;
+		mdata->security_state &= ~mask;
+	} else {
+		return -EINVAL;
+	}
+	return count;
+}
+
+static DEVICE_ATTR_RW(security_lock);
+
+static struct attribute *cxl_mock_mem_attrs[] = {
+	&dev_attr_security_lock.attr,
+	NULL
+};
+ATTRIBUTE_GROUPS(cxl_mock_mem);
+
+static const struct platform_device_id cxl_mock_mem_ids[] = {
+	{ .name = "cxl_mem", 0 },
+	{ .name = "cxl_rcd", 1 },
+	{ },
+};
+MODULE_DEVICE_TABLE(platform, cxl_mock_mem_ids);
+
+static struct platform_driver cxl_mock_mem_driver = {
+	.probe = cxl_mock_mem_probe,
+	.id_table = cxl_mock_mem_ids,
+	.driver = {
+		.name = KBUILD_MODNAME,
+		.dev_groups = cxl_mock_mem_groups,
+	},
+};
+
+module_platform_driver(cxl_mock_mem_driver);
+MODULE_LICENSE("GPL v2");
+MODULE_IMPORT_NS(CXL);