Merge tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-tracegrafted

Pull tracing fixes from Steven Rostedt:

 - Fix error output of boot instance creation failure

   Currently if a boot instance creation fails, instead of printing out
   the name of the instance that failed, it prints "(null)". That is
   because it prints "cur_str" that had already been processed by
   strsep(). Print the saved name instead.

   While at it, print the error code of the failure.

 - Fix use-after-free for same named historgrams

   Histograms can be named so that they can be used in multiple events.
   But if the named histogram has a variable attached, the second event
   that uses the named histogram which duplicates it and needs to free
   the original after duplication leaves the old variable in place and
   still visible. If another histogram uses than variable, it will use
   the stale one which will try to reference the freed duplicate
   histogram and crash the kernel.

   Free the duplicate variables along with the duplicated histogram
   data.

 - Check return value of kthread_run() in event self test

   The events self tests uses a kthread for testing but does not check
   if it succeeded in creating a kthread. If the kthread creation were
   to fail, the code will still try to call kthread_stop() on the error
   returned.

 - Fix race between reading trace_pipe and updating subbuffer size

   If a user is reading the trace_pipe file at the same time they update
   the ring buffer sub-buffer size, can cause the trace_pipe read to
   read stale data. Add trace_access_lock() around updating the ring
   buffer sub-buffer size.

 - Fix eventfs_inode on failure path in creation of the events directory

   In the creation of the "events" directory, if after allocating the
   eventfs_inode a failure is detected, it calls cleanup_ei() which
   calls free_ei(). The free_ei() will test if eventfs_inode being freed
   has no children. It is a bug if it does. But on the failure case of
   the creation of the "events" directory, the children lists have not
   yet been initialized and the free will trigger a warning because
   list_empty() on an uninitialized list returns false.

   Move the initialization into init_ei() where it makes more sense and
   makes sure that a created eventfs_inode has its lists initialized
   upon creation.

 - Check return value of kthread_run() in ftrace direct sample code

   The sample code that shows how to use the ftrace direct calls does
   not test the return of kthread_run() to see if it succeeds. Return a
   failure if the kthread_run() doesn't succeed.

 - Clear user events state on fork in case of alloc failure

   On fork, the child gets a pointer to the parent's user events state.
   It makes a copy of it then updates the child's pointer to it. But if
   the allocation fails, the duplication function leaves the child with
   a pointer to its parent's descriptor. When the child cleans up its
   data, it will free the parent's descriptor while the parent is still
   using it.

   In the duplication function, set the child's user_event_mm to NULL
   before testing if the allocation succeeded, and when it exits it will
   not free the parent's descriptor.

 - Fix retry exhaustion in simple ring buffer reader swap

   simple_ring_buffer_swap_reader_page() starts with retry set to 8 and
   post-decrements it only after a failed link replacement. On the final
   attempt, a successful replacement leaves retry at zero, while a
   failed replacement leaves it at -1.

   But the check for success expects the retry value to be non-zero and
   exits with an error on zero. This is the opposite result. Fix it.

 - Fail nicely when the remote swap_reader_page() returns an error

   Currently, if the swap_reader_page() of a remote buffer fails, it
   triggers a WARN_ON_ONCE() and continues normally. Instead, have it
   exit with an error and a pr_warn() print instead of a full WARNING.

* tag 'trace-v7.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  ring-buffer: Stop remote reader update when page swap fails
  tracing: Fix retry exhaustion in simple ring buffer reader swap
  tracing/user_events: Clear copied tracing state before fork duplication
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-multi-modify
  samples/ftrace: Fix kthread_stop() on ERR_PTR in ftrace-direct-modify
  eventfs: Initialize ei->children and ei->list in init_ei()
  tracing: Fix use-after-free in trace_pipe read on sub-buffer order change
  tracing: Fix crash passing ERR_PTR to kthread_stop()
  tracing: Fix use-after-free with same-name named triggers
  tracing: Fix logged instance name on creation failure

1 files changed, 609 insertions, 0 deletions

diff --git a/drivers/misc/smpro-errmon.c b/drivers/misc/smpro-errmon.c
new file mode 100644
index 000000000..56952fd96
--- /dev/null
+++ b/drivers/misc/smpro-errmon.c
@@ -0,0 +1,609 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Ampere Computing SoC's SMpro Error Monitoring Driver
+ *
+ * Copyright (c) 2022, Ampere Computing LLC
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+
+/* GPI RAS Error Registers */
+#define GPI_RAS_ERR		0x7E
+
+/* Core and L2C Error Registers */
+#define CORE_CE_ERR_CNT		0x80
+#define CORE_CE_ERR_LEN		0x81
+#define CORE_CE_ERR_DATA	0x82
+#define CORE_UE_ERR_CNT		0x83
+#define CORE_UE_ERR_LEN		0x84
+#define CORE_UE_ERR_DATA	0x85
+
+/* Memory Error Registers */
+#define MEM_CE_ERR_CNT		0x90
+#define MEM_CE_ERR_LEN		0x91
+#define MEM_CE_ERR_DATA		0x92
+#define MEM_UE_ERR_CNT		0x93
+#define MEM_UE_ERR_LEN		0x94
+#define MEM_UE_ERR_DATA		0x95
+
+/* RAS Error/Warning Registers */
+#define ERR_SMPRO_TYPE		0xA0
+#define ERR_PMPRO_TYPE		0xA1
+#define ERR_SMPRO_INFO_LO	0xA2
+#define ERR_SMPRO_INFO_HI	0xA3
+#define ERR_SMPRO_DATA_LO	0xA4
+#define ERR_SMPRO_DATA_HI	0xA5
+#define WARN_SMPRO_INFO_LO	0xAA
+#define WARN_SMPRO_INFO_HI	0xAB
+#define ERR_PMPRO_INFO_LO	0xA6
+#define ERR_PMPRO_INFO_HI	0xA7
+#define ERR_PMPRO_DATA_LO	0xA8
+#define ERR_PMPRO_DATA_HI	0xA9
+#define WARN_PMPRO_INFO_LO	0xAC
+#define WARN_PMPRO_INFO_HI	0xAD
+
+/* Boot Stage Register */
+#define BOOTSTAGE		0xB0
+#define DIMM_SYNDROME_SEL	0xB4
+#define DIMM_SYNDROME_ERR	0xB5
+#define DIMM_SYNDROME_STAGE	4
+
+/* PCIE Error Registers */
+#define PCIE_CE_ERR_CNT		0xC0
+#define PCIE_CE_ERR_LEN		0xC1
+#define PCIE_CE_ERR_DATA	0xC2
+#define PCIE_UE_ERR_CNT		0xC3
+#define PCIE_UE_ERR_LEN		0xC4
+#define PCIE_UE_ERR_DATA	0xC5
+
+/* Other Error Registers */
+#define OTHER_CE_ERR_CNT	0xD0
+#define OTHER_CE_ERR_LEN	0xD1
+#define OTHER_CE_ERR_DATA	0xD2
+#define OTHER_UE_ERR_CNT	0xD8
+#define OTHER_UE_ERR_LEN	0xD9
+#define OTHER_UE_ERR_DATA	0xDA
+
+/* Event Data Registers */
+#define VRD_WARN_FAULT_EVENT_DATA	0x78
+#define VRD_HOT_EVENT_DATA		0x79
+#define DIMM_HOT_EVENT_DATA		0x7A
+#define DIMM_2X_REFRESH_EVENT_DATA	0x96
+
+#define MAX_READ_BLOCK_LENGTH	48
+
+#define RAS_SMPRO_ERR		0
+#define RAS_PMPRO_ERR		1
+
+enum RAS_48BYTES_ERR_TYPES {
+	CORE_CE_ERR,
+	CORE_UE_ERR,
+	MEM_CE_ERR,
+	MEM_UE_ERR,
+	PCIE_CE_ERR,
+	PCIE_UE_ERR,
+	OTHER_CE_ERR,
+	OTHER_UE_ERR,
+	NUM_48BYTES_ERR_TYPE,
+};
+
+struct smpro_error_hdr {
+	u8 count;	/* Number of the RAS errors */
+	u8 len;		/* Number of data bytes */
+	u8 data;	/* Start of 48-byte data */
+	u8 max_cnt;	/* Max num of errors */
+};
+
+/*
+ * Included Address of registers to get Count, Length of data and Data
+ * of the 48 bytes error data
+ */
+static struct smpro_error_hdr smpro_error_table[] = {
+	[CORE_CE_ERR] = {
+		.count = CORE_CE_ERR_CNT,
+		.len = CORE_CE_ERR_LEN,
+		.data = CORE_CE_ERR_DATA,
+		.max_cnt = 32
+	},
+	[CORE_UE_ERR] = {
+		.count = CORE_UE_ERR_CNT,
+		.len = CORE_UE_ERR_LEN,
+		.data = CORE_UE_ERR_DATA,
+		.max_cnt = 32
+	},
+	[MEM_CE_ERR] = {
+		.count = MEM_CE_ERR_CNT,
+		.len = MEM_CE_ERR_LEN,
+		.data = MEM_CE_ERR_DATA,
+		.max_cnt = 16
+	},
+	[MEM_UE_ERR] = {
+		.count = MEM_UE_ERR_CNT,
+		.len = MEM_UE_ERR_LEN,
+		.data = MEM_UE_ERR_DATA,
+		.max_cnt = 16
+	},
+	[PCIE_CE_ERR] = {
+		.count = PCIE_CE_ERR_CNT,
+		.len = PCIE_CE_ERR_LEN,
+		.data = PCIE_CE_ERR_DATA,
+		.max_cnt = 96
+	},
+	[PCIE_UE_ERR] = {
+		.count = PCIE_UE_ERR_CNT,
+		.len = PCIE_UE_ERR_LEN,
+		.data = PCIE_UE_ERR_DATA,
+		.max_cnt = 96
+	},
+	[OTHER_CE_ERR] = {
+		.count = OTHER_CE_ERR_CNT,
+		.len = OTHER_CE_ERR_LEN,
+		.data = OTHER_CE_ERR_DATA,
+		.max_cnt = 8
+	},
+	[OTHER_UE_ERR] = {
+		.count = OTHER_UE_ERR_CNT,
+		.len = OTHER_UE_ERR_LEN,
+		.data = OTHER_UE_ERR_DATA,
+		.max_cnt = 8
+	},
+};
+
+/*
+ * List of SCP registers which are used to get
+ * one type of RAS Internal errors.
+ */
+struct smpro_int_error_hdr {
+	u8 type;
+	u8 info_l;
+	u8 info_h;
+	u8 data_l;
+	u8 data_h;
+	u8 warn_l;
+	u8 warn_h;
+};
+
+static struct smpro_int_error_hdr list_smpro_int_error_hdr[] = {
+	[RAS_SMPRO_ERR] = {
+		.type = ERR_SMPRO_TYPE,
+		.info_l = ERR_SMPRO_INFO_LO,
+		.info_h = ERR_SMPRO_INFO_HI,
+		.data_l = ERR_SMPRO_DATA_LO,
+		.data_h = ERR_SMPRO_DATA_HI,
+		.warn_l = WARN_SMPRO_INFO_LO,
+		.warn_h = WARN_SMPRO_INFO_HI,
+	},
+	[RAS_PMPRO_ERR] = {
+		.type = ERR_PMPRO_TYPE,
+		.info_l = ERR_PMPRO_INFO_LO,
+		.info_h = ERR_PMPRO_INFO_HI,
+		.data_l = ERR_PMPRO_DATA_LO,
+		.data_h = ERR_PMPRO_DATA_HI,
+		.warn_l = WARN_PMPRO_INFO_LO,
+		.warn_h = WARN_PMPRO_INFO_HI,
+	},
+};
+
+struct smpro_errmon {
+	struct regmap *regmap;
+};
+
+enum EVENT_TYPES {
+	VRD_WARN_FAULT_EVENT,
+	VRD_HOT_EVENT,
+	DIMM_HOT_EVENT,
+	DIMM_2X_REFRESH_EVENT,
+	NUM_EVENTS_TYPE,
+};
+
+/* Included Address of event source and data registers */
+static u8 smpro_event_table[NUM_EVENTS_TYPE] = {
+	VRD_WARN_FAULT_EVENT_DATA,
+	VRD_HOT_EVENT_DATA,
+	DIMM_HOT_EVENT_DATA,
+	DIMM_2X_REFRESH_EVENT_DATA,
+};
+
+static ssize_t smpro_event_data_read(struct device *dev,
+				     struct device_attribute *da, char *buf,
+				     int channel)
+{
+	struct smpro_errmon *errmon = dev_get_drvdata(dev);
+	s32 event_data;
+	int ret;
+
+	ret = regmap_read(errmon->regmap, smpro_event_table[channel], &event_data);
+	if (ret)
+		return ret;
+	/* Clear event after read */
+	if (event_data != 0)
+		regmap_write(errmon->regmap, smpro_event_table[channel], event_data);
+
+	return sysfs_emit(buf, "%04x\n", event_data);
+}
+
+static ssize_t smpro_overflow_data_read(struct device *dev, struct device_attribute *da,
+					char *buf, int channel)
+{
+	struct smpro_errmon *errmon = dev_get_drvdata(dev);
+	struct smpro_error_hdr *err_info;
+	s32 err_count;
+	int ret;
+
+	err_info = &smpro_error_table[channel];
+
+	ret = regmap_read(errmon->regmap, err_info->count, &err_count);
+	if (ret)
+		return ret;
+
+	/* Bit 8 indicates the overflow status */
+	return sysfs_emit(buf, "%d\n", (err_count & BIT(8)) ? 1 : 0);
+}
+
+static ssize_t smpro_error_data_read(struct device *dev, struct device_attribute *da,
+				     char *buf, int channel)
+{
+	struct smpro_errmon *errmon = dev_get_drvdata(dev);
+	unsigned char err_data[MAX_READ_BLOCK_LENGTH];
+	struct smpro_error_hdr *err_info;
+	s32 err_count, err_length;
+	int ret;
+
+	err_info = &smpro_error_table[channel];
+
+	ret = regmap_read(errmon->regmap, err_info->count, &err_count);
+	/* Error count is the low byte */
+	err_count &= 0xff;
+	if (ret || !err_count || err_count > err_info->max_cnt)
+		return ret;
+
+	ret = regmap_read(errmon->regmap, err_info->len, &err_length);
+	if (ret || err_length <= 0)
+		return ret;
+
+	if (err_length > MAX_READ_BLOCK_LENGTH)
+		err_length = MAX_READ_BLOCK_LENGTH;
+
+	memset(err_data, 0x00, MAX_READ_BLOCK_LENGTH);
+	ret = regmap_noinc_read(errmon->regmap, err_info->data, err_data, err_length);
+	if (ret < 0)
+		return ret;
+
+	/* clear the error */
+	ret = regmap_write(errmon->regmap, err_info->count, 0x100);
+	if (ret)
+		return ret;
+	/*
+	 * The output of Core/Memory/PCIe/Others UE/CE errors follows the format
+	 * specified in section 5.8.1 CE/UE Error Data record in
+	 * Altra SOC BMC Interface specification.
+	 */
+	return sysfs_emit(buf, "%*phN\n", MAX_READ_BLOCK_LENGTH, err_data);
+}
+
+/*
+ * Output format:
+ * <4-byte hex value of error info><4-byte hex value of error extensive data>
+ * Where:
+ *   + error info : The error information
+ *   + error data : Extensive data (32 bits)
+ * Reference to section 5.10 RAS Internal Error Register Definition in
+ * Altra SOC BMC Interface specification
+ */
+static ssize_t smpro_internal_err_read(struct device *dev, struct device_attribute *da,
+				       char *buf, int channel)
+{
+	struct smpro_errmon *errmon = dev_get_drvdata(dev);
+	struct smpro_int_error_hdr *err_info;
+	unsigned int err[4] = { 0 };
+	unsigned int err_type;
+	unsigned int val;
+	int ret;
+
+	/* read error status */
+	ret = regmap_read(errmon->regmap, GPI_RAS_ERR, &val);
+	if (ret)
+		return ret;
+
+	if ((channel == RAS_SMPRO_ERR && !(val & BIT(0))) ||
+	    (channel == RAS_PMPRO_ERR && !(val & BIT(1))))
+		return 0;
+
+	err_info = &list_smpro_int_error_hdr[channel];
+	ret = regmap_read(errmon->regmap, err_info->type, &val);
+	if (ret)
+		return ret;
+
+	err_type = (val & BIT(1)) ? BIT(1) :
+		   (val & BIT(2)) ? BIT(2) : 0;
+
+	if (!err_type)
+		return 0;
+
+	ret = regmap_read(errmon->regmap, err_info->info_l, err + 1);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(errmon->regmap, err_info->info_h, err);
+	if (ret)
+		return ret;
+
+	if (err_type & BIT(2)) {
+		/* Error with data type */
+		ret = regmap_read(errmon->regmap, err_info->data_l, err + 3);
+		if (ret)
+			return ret;
+
+		ret = regmap_read(errmon->regmap, err_info->data_h, err + 2);
+		if (ret)
+			return ret;
+	}
+
+	/* clear the read errors */
+	ret = regmap_write(errmon->regmap, err_info->type, err_type);
+	if (ret)
+		return ret;
+
+	return sysfs_emit(buf, "%*phN\n", (int)sizeof(err), err);
+}
+
+/*
+ * Output format:
+ * <4-byte hex value of warining info>
+ * Reference to section 5.10 RAS Internal Error Register Definition in
+ * Altra SOC BMC Interface specification
+ */
+static ssize_t smpro_internal_warn_read(struct device *dev, struct device_attribute *da,
+					char *buf, int channel)
+{
+	struct smpro_errmon *errmon = dev_get_drvdata(dev);
+	struct smpro_int_error_hdr *err_info;
+	unsigned int warn[2] = { 0 };
+	unsigned int val;
+	int ret;
+
+	/* read error status */
+	ret = regmap_read(errmon->regmap, GPI_RAS_ERR, &val);
+	if (ret)
+		return ret;
+
+	if ((channel == RAS_SMPRO_ERR && !(val & BIT(0))) ||
+	    (channel == RAS_PMPRO_ERR && !(val & BIT(1))))
+		return 0;
+
+	err_info = &list_smpro_int_error_hdr[channel];
+	ret = regmap_read(errmon->regmap, err_info->type, &val);
+	if (ret)
+		return ret;
+
+	if (!(val & BIT(0)))
+		return 0;
+
+	ret = regmap_read(errmon->regmap, err_info->warn_l, warn + 1);
+	if (ret)
+		return ret;
+
+	ret = regmap_read(errmon->regmap, err_info->warn_h, warn);
+	if (ret)
+		return ret;
+
+	/* clear the warning */
+	ret = regmap_write(errmon->regmap, err_info->type, BIT(0));
+	if (ret)
+		return ret;
+
+	return sysfs_emit(buf, "%*phN\n", (int)sizeof(warn), warn);
+}
+
+#define ERROR_OVERFLOW_RO(_error, _index) \
+	static ssize_t overflow_##_error##_show(struct device *dev,            \
+						struct device_attribute *da,   \
+						char *buf)                     \
+	{                                                                      \
+		return smpro_overflow_data_read(dev, da, buf, _index);         \
+	}                                                                      \
+	static DEVICE_ATTR_RO(overflow_##_error)
+
+ERROR_OVERFLOW_RO(core_ce, CORE_CE_ERR);
+ERROR_OVERFLOW_RO(core_ue, CORE_UE_ERR);
+ERROR_OVERFLOW_RO(mem_ce, MEM_CE_ERR);
+ERROR_OVERFLOW_RO(mem_ue, MEM_UE_ERR);
+ERROR_OVERFLOW_RO(pcie_ce, PCIE_CE_ERR);
+ERROR_OVERFLOW_RO(pcie_ue, PCIE_UE_ERR);
+ERROR_OVERFLOW_RO(other_ce, OTHER_CE_ERR);
+ERROR_OVERFLOW_RO(other_ue, OTHER_UE_ERR);
+
+#define ERROR_RO(_error, _index) \
+	static ssize_t error_##_error##_show(struct device *dev,            \
+					     struct device_attribute *da,   \
+					     char *buf)                     \
+	{                                                                   \
+		return smpro_error_data_read(dev, da, buf, _index);         \
+	}                                                                   \
+	static DEVICE_ATTR_RO(error_##_error)
+
+ERROR_RO(core_ce, CORE_CE_ERR);
+ERROR_RO(core_ue, CORE_UE_ERR);
+ERROR_RO(mem_ce, MEM_CE_ERR);
+ERROR_RO(mem_ue, MEM_UE_ERR);
+ERROR_RO(pcie_ce, PCIE_CE_ERR);
+ERROR_RO(pcie_ue, PCIE_UE_ERR);
+ERROR_RO(other_ce, OTHER_CE_ERR);
+ERROR_RO(other_ue, OTHER_UE_ERR);
+
+static ssize_t error_smpro_show(struct device *dev, struct device_attribute *da, char *buf)
+{
+	return smpro_internal_err_read(dev, da, buf, RAS_SMPRO_ERR);
+}
+static DEVICE_ATTR_RO(error_smpro);
+
+static ssize_t error_pmpro_show(struct device *dev, struct device_attribute *da, char *buf)
+{
+	return smpro_internal_err_read(dev, da, buf, RAS_PMPRO_ERR);
+}
+static DEVICE_ATTR_RO(error_pmpro);
+
+static ssize_t warn_smpro_show(struct device *dev, struct device_attribute *da, char *buf)
+{
+	return smpro_internal_warn_read(dev, da, buf, RAS_SMPRO_ERR);
+}
+static DEVICE_ATTR_RO(warn_smpro);
+
+static ssize_t warn_pmpro_show(struct device *dev, struct device_attribute *da, char *buf)
+{
+	return smpro_internal_warn_read(dev, da, buf, RAS_PMPRO_ERR);
+}
+static DEVICE_ATTR_RO(warn_pmpro);
+
+#define EVENT_RO(_event, _index) \
+	static ssize_t event_##_event##_show(struct device *dev,            \
+					     struct device_attribute *da,   \
+					     char *buf)                     \
+	{                                                                   \
+		return smpro_event_data_read(dev, da, buf, _index);         \
+	}                                                                   \
+	static DEVICE_ATTR_RO(event_##_event)
+
+EVENT_RO(vrd_warn_fault, VRD_WARN_FAULT_EVENT);
+EVENT_RO(vrd_hot, VRD_HOT_EVENT);
+EVENT_RO(dimm_hot, DIMM_HOT_EVENT);
+EVENT_RO(dimm_2x_refresh, DIMM_2X_REFRESH_EVENT);
+
+static ssize_t smpro_dimm_syndrome_read(struct device *dev, struct device_attribute *da,
+					char *buf, unsigned int slot)
+{
+	struct smpro_errmon *errmon = dev_get_drvdata(dev);
+	unsigned int data;
+	int ret;
+
+	ret = regmap_read(errmon->regmap, BOOTSTAGE, &data);
+	if (ret)
+		return ret;
+
+	/* check for valid stage */
+	data = (data >> 8) & 0xff;
+	if (data != DIMM_SYNDROME_STAGE)
+		return ret;
+
+	/* Write the slot ID to retrieve Error Syndrome */
+	ret = regmap_write(errmon->regmap, DIMM_SYNDROME_SEL, slot);
+	if (ret)
+		return ret;
+
+	/* Read the Syndrome error */
+	ret = regmap_read(errmon->regmap, DIMM_SYNDROME_ERR, &data);
+	if (ret || !data)
+		return ret;
+
+	return sysfs_emit(buf, "%04x\n", data);
+}
+
+#define EVENT_DIMM_SYNDROME(_slot) \
+	static ssize_t event_dimm##_slot##_syndrome_show(struct device *dev,          \
+							 struct device_attribute *da, \
+							 char *buf)                   \
+	{                                                                             \
+		return smpro_dimm_syndrome_read(dev, da, buf, _slot);                 \
+	}                                                                             \
+	static DEVICE_ATTR_RO(event_dimm##_slot##_syndrome)
+
+EVENT_DIMM_SYNDROME(0);
+EVENT_DIMM_SYNDROME(1);
+EVENT_DIMM_SYNDROME(2);
+EVENT_DIMM_SYNDROME(3);
+EVENT_DIMM_SYNDROME(4);
+EVENT_DIMM_SYNDROME(5);
+EVENT_DIMM_SYNDROME(6);
+EVENT_DIMM_SYNDROME(7);
+EVENT_DIMM_SYNDROME(8);
+EVENT_DIMM_SYNDROME(9);
+EVENT_DIMM_SYNDROME(10);
+EVENT_DIMM_SYNDROME(11);
+EVENT_DIMM_SYNDROME(12);
+EVENT_DIMM_SYNDROME(13);
+EVENT_DIMM_SYNDROME(14);
+EVENT_DIMM_SYNDROME(15);
+
+static struct attribute *smpro_errmon_attrs[] = {
+	&dev_attr_overflow_core_ce.attr,
+	&dev_attr_overflow_core_ue.attr,
+	&dev_attr_overflow_mem_ce.attr,
+	&dev_attr_overflow_mem_ue.attr,
+	&dev_attr_overflow_pcie_ce.attr,
+	&dev_attr_overflow_pcie_ue.attr,
+	&dev_attr_overflow_other_ce.attr,
+	&dev_attr_overflow_other_ue.attr,
+	&dev_attr_error_core_ce.attr,
+	&dev_attr_error_core_ue.attr,
+	&dev_attr_error_mem_ce.attr,
+	&dev_attr_error_mem_ue.attr,
+	&dev_attr_error_pcie_ce.attr,
+	&dev_attr_error_pcie_ue.attr,
+	&dev_attr_error_other_ce.attr,
+	&dev_attr_error_other_ue.attr,
+	&dev_attr_error_smpro.attr,
+	&dev_attr_error_pmpro.attr,
+	&dev_attr_warn_smpro.attr,
+	&dev_attr_warn_pmpro.attr,
+	&dev_attr_event_vrd_warn_fault.attr,
+	&dev_attr_event_vrd_hot.attr,
+	&dev_attr_event_dimm_hot.attr,
+	&dev_attr_event_dimm_2x_refresh.attr,
+	&dev_attr_event_dimm0_syndrome.attr,
+	&dev_attr_event_dimm1_syndrome.attr,
+	&dev_attr_event_dimm2_syndrome.attr,
+	&dev_attr_event_dimm3_syndrome.attr,
+	&dev_attr_event_dimm4_syndrome.attr,
+	&dev_attr_event_dimm5_syndrome.attr,
+	&dev_attr_event_dimm6_syndrome.attr,
+	&dev_attr_event_dimm7_syndrome.attr,
+	&dev_attr_event_dimm8_syndrome.attr,
+	&dev_attr_event_dimm9_syndrome.attr,
+	&dev_attr_event_dimm10_syndrome.attr,
+	&dev_attr_event_dimm11_syndrome.attr,
+	&dev_attr_event_dimm12_syndrome.attr,
+	&dev_attr_event_dimm13_syndrome.attr,
+	&dev_attr_event_dimm14_syndrome.attr,
+	&dev_attr_event_dimm15_syndrome.attr,
+	NULL
+};
+
+ATTRIBUTE_GROUPS(smpro_errmon);
+
+static int smpro_errmon_probe(struct platform_device *pdev)
+{
+	struct smpro_errmon *errmon;
+
+	errmon = devm_kzalloc(&pdev->dev, sizeof(struct smpro_errmon), GFP_KERNEL);
+	if (!errmon)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, errmon);
+
+	errmon->regmap = dev_get_regmap(pdev->dev.parent, NULL);
+	if (!errmon->regmap)
+		return -ENODEV;
+
+	return 0;
+}
+
+static struct platform_driver smpro_errmon_driver = {
+	.probe          = smpro_errmon_probe,
+	.driver = {
+		.name   = "smpro-errmon",
+		.dev_groups = smpro_errmon_groups,
+	},
+};
+
+module_platform_driver(smpro_errmon_driver);
+
+MODULE_AUTHOR("Tung Nguyen <tung.nguyen@amperecomputing.com>");
+MODULE_AUTHOR("Thinh Pham <thinh.pham@amperecomputing.com>");
+MODULE_AUTHOR("Hoang Nguyen <hnguyen@amperecomputing.com>");
+MODULE_AUTHOR("Thu Nguyen <thu@os.amperecomputing.com>");
+MODULE_AUTHOR("Quan Nguyen <quan@os.amperecomputing.com>");
+MODULE_DESCRIPTION("Ampere Altra SMpro driver");
+MODULE_LICENSE("GPL");