Re: [PATCH v4 1/6] efi / ras: CCIX Memory error reporting

[Mauro Carvalho Chehab <mchehab+huawei@kernel.org>]

Em Wed, 13 Nov 2019 23:16:22 +0800
Jonathan Cameron <Jonathan.Cameron@huawei.com> escreveu:

> CCIX defines a number of different error types
> (See CCIX spec 1.0) and UEFI 2.8 defines a CPER record to allow
> for them to be reported when firmware first handling is in use.
> The last part of that record is a copy of the CCIX protocol
> error record which can provide very detailed information.
> 
> This patch introduces infrastructure and support for one of those
> error types, CCIX Memory Errors.  Later patches will supply
> equivalent support for the other error types.
> 
> The variable length and content of the different messages makes
> a single tracepoint impractical.  As such the current RAS
> tracepoint only covers the memory error. Additional trace points
> will be introduced for other error types along with their
> cper handling in a follow up series.

I want to see the entire series before reviewing the tracepoint
stuff.

For now, I'm pointing just some issues I found at the code.

> 
> RAS daemon support to follow shortly.

That's ok. I probably will review RAS daemon patchsets only after we merge 
the Kernel patchset.

> qemu injection patches
> also available but not currently planing to upstream those.
> 
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
> ---
>  drivers/acpi/apei/Kconfig        |   8 +
>  drivers/acpi/apei/ghes.c         |  39 ++++
>  drivers/firmware/efi/Kconfig     |   5 +
>  drivers/firmware/efi/Makefile    |   1 +
>  drivers/firmware/efi/cper-ccix.c | 359 +++++++++++++++++++++++++++++++
>  drivers/firmware/efi/cper.c      |   6 +
>  include/linux/cper.h             | 118 ++++++++++
>  include/ras/ras_event.h          |  79 +++++++
>  8 files changed, 615 insertions(+)
> 
> diff --git a/drivers/acpi/apei/Kconfig b/drivers/acpi/apei/Kconfig
> index 6b18f8bc7be3..e687b18dee34 100644
> --- a/drivers/acpi/apei/Kconfig
> +++ b/drivers/acpi/apei/Kconfig
> @@ -68,3 +68,11 @@ config ACPI_APEI_ERST_DEBUG
>  	  error information to and from a persistent store. Enable this
>  	  if you want to debugging and testing the ERST kernel support
>  	  and firmware implementation.
> +
> +config ACPI_APEI_CCIX
> +       bool "APEI CCIX error recovery support"
> +       depends on ACPI_APEI && MEMORY_FAILURE
> +       help
> +	 CCIX has a number of defined error types. This option enables
> +	 the handling of CPER records generated by a firmware performing
> +	 firmware first error handling of these CCIX errors.
> diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
> index 777f6f7122b4..75a177ae9de3 100644
> --- a/drivers/acpi/apei/ghes.c
> +++ b/drivers/acpi/apei/ghes.c
> @@ -490,6 +490,42 @@ static void ghes_handle_aer(struct acpi_hest_generic_data *gdata)
>  #endif
>  }
>  
> +static void ghes_handle_ccix_per(struct acpi_hest_generic_data *gdata, int sev)
> +{
> +#ifdef CONFIG_ACPI_APEI_CCIX
> +	struct cper_sec_ccix_header *header = acpi_hest_get_payload(gdata);
> +	__u32 *dw;
> +	enum ccix_per_type per_type;
> +	static u32 err_seq;
> +	void *payload;
> +
> +	/* Check if space for CCIX CPER header and 8 DW of a PER log header */
> +	if (gdata->error_data_length <
> +	    sizeof(*header) + CCIX_PER_LOG_HEADER_DWS * sizeof(__u32))
> +		return;
> +
> +	if ((header->validation_bits & CPER_CCIX_VALID_PER_LOG) == 0)
> +		return;
> +
> +	dw = (__u32 *)(header + 1);
> +
> +	per_type = FIELD_GET(CCIX_PER_LOG_DW1_PER_TYPE_M, dw[1]);
> +	payload = acpi_hest_get_payload(gdata);
> +
> +	switch (per_type) {
> +	case CCIX_MEMORY_ERROR:
> +		trace_ccix_memory_error_event(payload, err_seq, sev,
> +					      ccix_mem_err_ven_len_get(payload));
> +		break;
> +	default:
> +		/* Unknown error type */
> +		pr_info("CCIX error of unknown or vendor defined type\n");
> +		break;
> +	}
> +	err_seq++;
> +#endif
> +}
> +
>  static void ghes_do_proc(struct ghes *ghes,
>  			 const struct acpi_hest_generic_status *estatus)
>  {
> @@ -520,6 +556,9 @@ static void ghes_do_proc(struct ghes *ghes,
>  		else if (guid_equal(sec_type, &CPER_SEC_PCIE)) {
>  			ghes_handle_aer(gdata);
>  		}
> +		else if (guid_equal(sec_type, &CPER_SEC_CCIX)) {
> +			ghes_handle_ccix_per(gdata, estatus->error_severity);
> +		}
>  		else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) {
>  			struct cper_sec_proc_arm *err = acpi_hest_get_payload(gdata);
>  
> diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
> index b248870a9806..096e693a9522 100644
> --- a/drivers/firmware/efi/Kconfig
> +++ b/drivers/firmware/efi/Kconfig
> @@ -209,6 +209,11 @@ config UEFI_CPER_X86
>  	depends on UEFI_CPER && X86
>  	default y
>  
> +config UEFI_CPER_CCIX
> +       bool
> +       depends on UEFI_CPER
> +       default y
> +
>  config EFI_DEV_PATH_PARSER
>  	bool
>  	depends on ACPI
> diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
> index 4ac2de4dfa72..9a52c7d01e94 100644
> --- a/drivers/firmware/efi/Makefile
> +++ b/drivers/firmware/efi/Makefile
> @@ -34,3 +34,4 @@ obj-$(CONFIG_EFI_CAPSULE_LOADER)	+= capsule-loader.o
>  obj-$(CONFIG_EFI_EARLYCON)		+= earlycon.o
>  obj-$(CONFIG_UEFI_CPER_ARM)		+= cper-arm.o
>  obj-$(CONFIG_UEFI_CPER_X86)		+= cper-x86.o
> +obj-$(CONFIG_UEFI_CPER_CCIX)		+= cper-ccix.o
> diff --git a/drivers/firmware/efi/cper-ccix.c b/drivers/firmware/efi/cper-ccix.c
> new file mode 100644
> index 000000000000..53ab5d650479
> --- /dev/null
> +++ b/drivers/firmware/efi/cper-ccix.c
> @@ -0,0 +1,359 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * UEFI Common Platform Error Record (CPER) support for CCIX
> + * protocol errors.
> + *
> + * Copyright (C) 2019, Huawei
> + *	Author: Jonathan Cameron <jonathan.cameron@huawei.com>
> + *
> + * The CCIX® trademark and CCIX trade name are owned solely by
> + * CCIX CONSORTIUM, INC. and all rights are reserved therein.
> + *
> + * CPER is the format used to describe platform hardware error by
> + * various tables, such as ERST, BERT and HEST etc.
> + *
> + * For more information about CPER, please refer to Appendix N of UEFI
> + * Specification version 2.9.
> + *
> + * CCIX defines a number of Protocol Error Messages which for the
> + * main body of the CCIX CPER records.  These are defined in the
> + * CCIX Specification 1.0.
> + */
> +
> +#include <acpi/ghes.h>
> +#include <linux/acpi.h>
> +#include <linux/bitfield.h>
> +#include <linux/cper.h>
> +#include <linux/kernel.h>
> +#include <linux/printk.h>
> +#include <ras/ras_event.h>
> +
> +static char rcd_decode_str[CPER_REC_LEN];
> +
> +static const char * const ccix_comp_type_strs[] = {
> +	"Request Agent",
> +	"Home Agent",
> +	"Slave Agent",
> +	"Port",
> +	"Link",
> +};
> +
> +const char *cper_ccix_comp_type_str(u8 comp_type)
> +{
> +	return comp_type < ARRAY_SIZE(ccix_comp_type_strs) ?
> +		ccix_comp_type_strs[comp_type] : "Reserved";
> +}
> +
> +static const char * const ccix_per_type_strs[] = {
> +	"Memory Error",
> +	"Cache Error",
> +	"ATC Error",
> +	"Port Error",
> +	"Link Error",
> +	"Agent Internal",
> +};
> +
> +static const char * const ccix_mem_pool_gen_type_strs[] = {
> +	"Other, Non-specified",
> +	"ROM",
> +	"Volatile",
> +	"Non-volatile",
> +	"Device",
> +};
> +
> +static const char *cper_ccix_mem_err_generic_type_str(u16 type)
> +{
> +	const char *gen_type_str;
> +
> +	if (type < ARRAY_SIZE(ccix_mem_pool_gen_type_strs))
> +		gen_type_str = ccix_mem_pool_gen_type_strs[type];
> +	else if (type >= 0x80)
> +		gen_type_str = "Vendor";
> +	else
> +		gen_type_str = "Reserved";
> +
> +	return gen_type_str;
> +}
> +
> +static const char * const ccix_mem_op_type_strs[] = {
> +	"Generic",
> +	"Read",
> +	"Write",
> +	"Reserved",
> +	"Scrub",
> +};
> +
> +static const char *cper_ccix_mem_err_op_str(u8 op_type)
> +{
> +	return op_type < ARRAY_SIZE(ccix_mem_op_type_strs) ?
> +		ccix_mem_op_type_strs[op_type] :
> +		"Reserved";
> +}
> +
> +/* Sightly different from the generic version */
> +static const char * const ccix_mem_err_type_strs[] = {
> +	"Unknown",
> +	"No Error",
> +	"Single-bit ECC",
> +	"Multi-bit ECC",
> +	"Single-symbol ChipKill ECC",
> +	"Multi-symbol ChipKill ECC",
> +	"Master Abort",
> +	"Target Abort",
> +	"Parity Error",
> +	"Watchdog Timeout",
> +	"Invalid Address",
> +	"Mirror Broken",
> +	"Memory Sparing",
> +	"Scrub",
> +	"Physical Memory Map-out Event",
> +};
> +
> +const char *cper_ccix_mem_err_type_str(unsigned int error_type)
> +{
> +	return error_type < ARRAY_SIZE(ccix_mem_err_type_strs) ?
> +		ccix_mem_err_type_strs[error_type] : "Reserved";
> +}
> +
> +static const char * const ccix_mem_spec_type_strs[] = {
> +	"Other, Not-specified",
> +	"SRAM",
> +	"DDR",
> +	"NVDIMM-F",
> +	"NVDIMM-N",
> +	"HBM",
> +	"Flash"
> +};
> +
> +static const char *cper_ccix_mem_err_spec_type_str(u8 specific_type)
> +{
> +	if (specific_type < ARRAY_SIZE(ccix_mem_spec_type_strs))
> +		return ccix_mem_spec_type_strs[specific_type];
> +	else if (specific_type >= 0x80)
> +		return "Vendor";
> +	else
> +		return "Reserved";
> +}
> +
> +/*
> + * We pack up everything except those that are needed for software handling:
> + * - error_type, physical_addr
> + * and header values that would require additional validation bits:
> + * - source, component, severity,
> + * implicit: protocol error type (mem)
> + */
> +void cper_ccix_mem_err_pack(const struct cper_sec_ccix_mem_error *mem_record,
> +			    struct cper_ccix_mem_err_compact *cmem_err,
> +			    const u16 vendor_data_len,
> +			    u8 *vendor_data)
> +{
> +	cmem_err->validation_bits = mem_record->validation_bits;
> +	cmem_err->mem_err_type = mem_record->memory_error_type;
> +	cmem_err->pool_generic_type = mem_record->pool_generic_type;
> +	cmem_err->op_type = mem_record->op_type;
> +	cmem_err->card = mem_record->card;
> +	cmem_err->module = mem_record->module;
> +	cmem_err->bank = mem_record->bank;
> +	cmem_err->device = mem_record->device;
> +	cmem_err->row = mem_record->row;
> +	cmem_err->column = mem_record->column;
> +	cmem_err->rank = mem_record->rank;
> +	cmem_err->bit_pos = mem_record->bit_pos;
> +	cmem_err->chip_id = mem_record->chip_id;
> +	cmem_err->pool_specific_type = mem_record->pool_specific_type;
> +	cmem_err->fru = mem_record->fru;
> +	memcpy(vendor_data, &mem_record->vendor_data[1], vendor_data_len);
> +}
> +
> +static int cper_ccix_err_location(struct cper_ccix_mem_err_compact *cmem_err,
> +				  char *msg)
> +{
> +	u32 len = CPER_REC_LEN - 1;

I don't like much the code here... I mean, based on the code below, the
msg to be passed here should have CPER_REC_LEN, but the function  prototype
doesn't reflect that. I would  instead, either pass len as a function parameter
or change the above to something like:

	static int cper_ccix_err_location(struct cper_ccix_mem_err_compact *cmem_err,
					  char msg[CPER_REC_LEN])
	{
		u32 len = sizeof(msg) - 1;

With that, gcc should be able to generate a warning if someone passes a
buffer with a different size.

> +	u32 n = 0;
> +
> +	if (!msg)
> +		return 0;
> +
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_GENERIC_MEM_VALID)
> +		n += snprintf(msg + n, len, "Pool Generic Type: %s ",
> +			      cper_ccix_mem_err_generic_type_str(cmem_err->pool_generic_type));

Here, n will always be 0, so no need of doing msg + n.

> +
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_MEM_ERR_TYPE_VALID)
> +		n += snprintf(msg + n, len, "Err Type: %s ",
> +			      cper_ccix_mem_err_type_str(cmem_err->mem_err_type));

Well, as the msg buffer size is given by len, and you have already
n characters there, you need to decrement the size at snprintf, in order
to avoid going past of len, e. g., starting from here, all snprintf()
statements should be, instead:

		n += snprintf(msg + n, len - n, ...);


> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_OP_VALID)
> +		n += snprintf(msg + n, len, "Operation: %s ",
> +			     cper_ccix_mem_err_op_str(cmem_err->op_type));
> +
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_CARD_VALID)
> +		n += snprintf(msg + n, len, "Card: %d ", cmem_err->card);
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_MOD_VALID)
> +		n += snprintf(msg + n, len, "Mod: %d ", cmem_err->module);
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_BANK_VALID)
> +		n += snprintf(msg + n, len, "Bank: %d ", cmem_err->bank);
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_DEVICE_VALID)
> +		n += snprintf(msg + n, len, "Device: %d ", cmem_err->device);
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_ROW_VALID)
> +		n += snprintf(msg + n, len, "Row: %d ", cmem_err->row);
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_COL_VALID)
> +		n += snprintf(msg + n, len, "Col: %d ", cmem_err->column);
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_RANK_VALID)
> +		n += snprintf(msg + n, len, "Rank: %d ", cmem_err->rank);
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_BIT_POS_VALID)
> +		n += snprintf(msg + n, len, "BitPos: %d ", cmem_err->bit_pos);
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_CHIP_ID_VALID)
> +		n += snprintf(msg + n, len, "ChipID: %d ", cmem_err->chip_id);
> +	if (cmem_err->validation_bits & CCIX_MEM_ERR_SPEC_TYPE_VALID)
> +		n += snprintf(msg + n, len, "Pool Specific Type: %s ",
> +			      cper_ccix_mem_err_spec_type_str(cmem_err->pool_specific_type));
> +	n += snprintf(msg + n, len, "FRU: %d ", cmem_err->fru);
> +
> +	return n;
> +}
> +
> +const char *cper_ccix_mem_err_unpack(struct trace_seq *p,
> +				     struct cper_ccix_mem_err_compact *cmem_err)
> +{
> +	const char *ret = trace_seq_buffer_ptr(p);
> +
> +	if (cper_ccix_err_location(cmem_err, rcd_decode_str))
> +		trace_seq_printf(p, "%s", rcd_decode_str);
> +	trace_seq_putc(p, '\0');
> +
> +	return ret;
> +}
> +
> +static int cper_ccix_mem_err_details(const char *pfx,
> +				     struct acpi_hest_generic_data *gdata)
> +{
> +	struct cper_ccix_mem_error *full_mem_err;
> +	struct cper_sec_ccix_mem_error *mem_err;
> +	u16 vendor_data_len;
> +	int i;
> +
> +	if (gdata->error_data_length < sizeof(*full_mem_err))
> +		return -ENOSPC;
> +
> +	full_mem_err = acpi_hest_get_payload(gdata);
> +
> +	mem_err = &full_mem_err->mem_record;
> +	printk("%s""FRU ID: %u, Length: %u\n", pfx,
> +	       mem_err->fru, mem_err->length);
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_GENERIC_MEM_VALID)
> +		printk("%s""Pool Generic Type: %s\n", pfx,
> +		       cper_ccix_mem_err_generic_type_str(mem_err->pool_generic_type));
> +
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_OP_VALID)
> +		printk("%s""Operation: %s\n", pfx,
> +		       cper_ccix_mem_err_op_str(mem_err->op_type));
> +
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_MEM_ERR_TYPE_VALID) {
> +		printk("%s""Mem Error Type: %s\n", pfx,
> +		       cper_ccix_mem_err_type_str(mem_err->memory_error_type));
> +	}
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_CARD_VALID)
> +		printk("%s""Card: %u\n", pfx, mem_err->card);
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_MOD_VALID)
> +		printk("%s""Module: %u\n", pfx, mem_err->module);
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_BANK_VALID)
> +		printk("%s""Bank: %u\n", pfx, mem_err->bank);
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_DEVICE_VALID)
> +		printk("%s""Device: %u\n", pfx, mem_err->device);
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_ROW_VALID)
> +		printk("%s""Row: %u\n", pfx, mem_err->row);
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_COL_VALID)
> +		printk("%s""Column: %u\n", pfx, mem_err->column);
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_RANK_VALID)
> +		printk("%s""Rank: %u\n", pfx, mem_err->rank);
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_BIT_POS_VALID)
> +		printk("%s""Bit Pos: %u\n", pfx, mem_err->bit_pos);
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_CHIP_ID_VALID)
> +		printk("%s""Chip ID: %u\n", pfx, mem_err->chip_id);
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_SPEC_TYPE_VALID)
> +		printk("%s""Specific Type: %s\n", pfx,
> +		       cper_ccix_mem_err_spec_type_str(mem_err->pool_specific_type));
> +
> +	if (mem_err->validation_bits & CCIX_MEM_ERR_VENDOR_DATA_VALID) {
> +		if (gdata->error_data_length < sizeof(*full_mem_err) + 4)
> +			return -ENOSPC;
> +
> +		vendor_data_len = mem_err->vendor_data[0] & GENMASK(15, 0);
> +		if (gdata->error_data_length <
> +		    sizeof(*full_mem_err) + vendor_data_len)
> +			return -ENOSPC;
> +
> +		for (i = 0; i < vendor_data_len / 4 - 1; i++)
> +			printk("%s""Vendor%d: 0x%08x\n", pfx, i,
> +			       mem_err->vendor_data[i + 1]);
> +	}
> +
> +	return 0;
> +}
> +
> +int cper_print_ccix_per(const char *pfx, struct acpi_hest_generic_data *gdata)
> +{
> +	struct cper_sec_ccix_header *header = acpi_hest_get_payload(gdata);
> +	__u32 *dw;
> +	__u32 comp_type;
> +	enum ccix_per_type per_type;
> +	bool vendor_per;
> +
> +	if (gdata->error_data_length < sizeof(*header))
> +		return -ENOSPC;
> +
> +	printk("%s""CPER Length: %u\n", pfx, header->length);
> +	if (header->validation_bits & CPER_CCIX_VALID_SOURCE_ID)
> +		printk("%s""Source: %u\n", pfx, header->source_id);
> +	if (header->validation_bits & CPER_CCIX_VALID_PORT_ID)
> +		printk("%s""Port: %u\n", pfx, header->port_id);
> +	/* Not much use if we don't have the per log, in theory it's optional */
> +	if ((header->validation_bits & CPER_CCIX_VALID_PER_LOG) == 0)
> +		return 0;
> +
> +	/* The per log header is a packed structure so needs breaking up */
> +	if (gdata->error_data_length < sizeof(*header) + 8 * 4)
> +		return -ENOSPC;
> +
> +	dw = (__u32 *)(header + 1);
> +
> +	printk("%s""PER Rev: %lu, Log Length: %lu\n", pfx,
> +	       FIELD_GET(CCIX_PER_LOG_DW0_REV_M, dw[0]),
> +	       FIELD_GET(CCIX_PER_LOG_DW0_LEN_M, dw[0]));
> +	comp_type = FIELD_GET(CCIX_PER_LOG_DW1_COMP_TYPE_M, dw[1]);
> +	printk("%s""Component: %s\n", pfx, cper_ccix_comp_type_str(comp_type));
> +	printk("%s""ME: %lu, SevUE: %lu, SevNoComm: %lu, SevDegraded: %lu, SevDeferred %lu\n",
> +	       pfx,
> +	       FIELD_GET(CCIX_PER_LOG_DW0_ME_M, dw[0]),
> +	       FIELD_GET(CCIX_PER_LOG_DW1_SEV_UE_M, dw[1]),
> +	       FIELD_GET(CCIX_PER_LOG_DW1_SEV_NO_COMM_M, dw[1]),
> +	       FIELD_GET(CCIX_PER_LOG_DW1_SEV_DEGRADED_M, dw[1]),
> +	       FIELD_GET(CCIX_PER_LOG_DW1_SEV_DEFFERABLE_M, dw[1]));
> +
> +	/* per_type is vendor defined if VEN is set */
> +	vendor_per = FIELD_GET(CCIX_PER_LOG_DW1_VEN_VAL_M, dw[1]) ?
> +		true : false;
> +	per_type = FIELD_GET(CCIX_PER_LOG_DW1_PER_TYPE_M, dw[1]);
> +	if (vendor_per)
> +		printk("%s""Protocol Error Type: Vendor%u", pfx, per_type);
> +	else
> +		printk("%s""Protocol Error Type: %s\n", pfx,
> +		       per_type < ARRAY_SIZE(ccix_per_type_strs) ?
> +		       ccix_per_type_strs[per_type] : "Reserved");
> +
> +	if (FIELD_GET(CCIX_PER_LOG_DW1_ADDR_VAL_M, dw[1]))
> +		printk("%s""Address: 0x%llx\n", pfx,
> +		       (((__u64)dw[2]) << 32) | (dw[3] & 0xFFFFFFFC));
> +
> +	/* Vendor defined PER message, perhaps we could print it out */
> +	if (vendor_per)
> +		return 0;
> +
> +	switch (per_type) {
> +	case CCIX_MEMORY_ERROR:
> +		return cper_ccix_mem_err_details(pfx, gdata);
> +	default:
> +		/* Vendor defined so no formatting be done */
> +		break;
> +	}
> +	return 0;
> +}
> diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
> index b1af0de2e100..03bb27db2e87 100644
> --- a/drivers/firmware/efi/cper.c
> +++ b/drivers/firmware/efi/cper.c
> @@ -474,6 +474,12 @@ cper_estatus_print_section(const char *pfx, struct acpi_hest_generic_data *gdata
>  			cper_print_pcie(newpfx, pcie, gdata);
>  		else
>  			goto err_section_too_small;
> +	} else if (guid_equal(sec_type, &CPER_SEC_CCIX)) {
> +		int ret;
> +		/* CCIX CPER entries are variable length */
> +		ret = cper_print_ccix_per(newpfx, gdata);
> +		if (ret)
> +			goto err_section_too_small;
>  #if defined(CONFIG_ARM64) || defined(CONFIG_ARM)
>  	} else if (guid_equal(sec_type, &CPER_SEC_PROC_ARM)) {
>  		struct cper_sec_proc_arm *arm_err = acpi_hest_get_payload(gdata);
> diff --git a/include/linux/cper.h b/include/linux/cper.h
> index 4f005d95ce88..df7a34c3ba4f 100644
> --- a/include/linux/cper.h
> +++ b/include/linux/cper.h
> @@ -174,6 +174,9 @@ enum {
>  #define CPER_SEC_PCIE							\
>  	GUID_INIT(0xD995E954, 0xBBC1, 0x430F, 0xAD, 0x91, 0xB4, 0x4D,	\
>  		  0xCB, 0x3C, 0x6F, 0x35)
> +#define CPER_SEC_CCIX							\
> +	GUID_INIT(0x91335EF6, 0xEBFB, 0x4478, 0xA6, 0xA6, 0x88, 0xB7,	\
> +		  0x28, 0xCF, 0x75, 0xD7)
>  /* Firmware Error Record Reference */
>  #define CPER_SEC_FW_ERR_REC_REF						\
>  	GUID_INIT(0x81212A96, 0x09ED, 0x4996, 0x94, 0x71, 0x8D, 0x72,	\
> @@ -242,6 +245,10 @@ enum {
>  
>  #define CPER_PCIE_SLOT_SHIFT			3
>  
> +#define CPER_CCIX_VALID_SOURCE_ID		BIT(0)
> +#define CPER_CCIX_VALID_PORT_ID			BIT(1)
> +#define CPER_CCIX_VALID_PER_LOG			BIT(2)
> +
>  #define CPER_ARM_VALID_MPIDR			BIT(0)
>  #define CPER_ARM_VALID_AFFINITY_LEVEL		BIT(1)
>  #define CPER_ARM_VALID_RUNNING_STATE		BIT(2)
> @@ -521,6 +528,105 @@ struct cper_sec_pcie {
>  	u8	aer_info[96];
>  };
>  
> +struct cper_sec_ccix_header {
> +	__u32	length;
> +	__u64	validation_bits;
> +	__u8	source_id;
> +	__u8	port_id;
> +	__u8	reserved[2];
> +};
> +
> +#define CCIX_PER_LOG_DW0_REV_M			GENMASK(7, 0)
> +#define CCIX_PER_LOG_DW0_LEN_M			GENMASK(14, 8)
> +#define CCIX_PER_LOG_DW0_ME_M			BIT(15)
> +#define CCIX_PER_LOG_DW1_COMP_TYPE_M		GENMASK(15, 12)
> +#define CCIX_PER_LOG_DW1_SEV_UE_M		BIT(16)
> +#define CCIX_PER_LOG_DW1_SEV_NO_COMM_M		BIT(17)
> +#define CCIX_PER_LOG_DW1_SEV_DEGRADED_M		BIT(18)
> +#define CCIX_PER_LOG_DW1_SEV_DEFFERABLE_M	BIT(19)
> +#define CCIX_PER_LOG_DW1_PER_TYPE_M		GENMASK(27, 24)
> +#define CCIX_PER_LOG_DW1_ADDR_VAL_M		BIT(30)
> +#define CCIX_PER_LOG_DW1_VEN_VAL_M		BIT(31)
> +enum ccix_per_type {
> +	CCIX_MEMORY_ERROR = 0,
> +	CCIX_CACHE_ERROR = 1,
> +	CCIX_ATC_ERROR = 2,
> +	CCIX_PORT_ERROR = 3,
> +	CCIX_LINK_ERROR = 4,
> +	CCIX_AGENT_INTERNAL_ERROR = 5,
> +};
> +
> +#define CCIX_PER_LOG_HEADER_DWS 8
> +
> +struct cper_sec_ccix_mem_error {
> +	__u32	validation_bits;
> +#define CCIX_MEM_ERR_GENERIC_MEM_VALID		BIT(0)
> +#define CCIX_MEM_ERR_OP_VALID			BIT(1)
> +#define CCIX_MEM_ERR_MEM_ERR_TYPE_VALID		BIT(2)
> +#define CCIX_MEM_ERR_CARD_VALID			BIT(3)
> +#define CCIX_MEM_ERR_BANK_VALID			BIT(4)
> +#define CCIX_MEM_ERR_DEVICE_VALID		BIT(5)
> +#define CCIX_MEM_ERR_ROW_VALID			BIT(6)
> +#define CCIX_MEM_ERR_COL_VALID			BIT(7)
> +#define CCIX_MEM_ERR_RANK_VALID			BIT(8)
> +#define CCIX_MEM_ERR_BIT_POS_VALID		BIT(9)
> +#define CCIX_MEM_ERR_CHIP_ID_VALID		BIT(10)
> +#define CCIX_MEM_ERR_VENDOR_DATA_VALID		BIT(11)
> +#define CCIX_MEM_ERR_MOD_VALID			BIT(12)
> +#define CCIX_MEM_ERR_SPEC_TYPE_VALID		BIT(13)
> +
> +	__u8	fru;
> +	__u8	reserved;
> +	__u16	length; /* Includes vendor specific log info */
> +	__u8	pool_generic_type;
> +	__u8	op_type;
> +	__u8	memory_error_type;
> +	__u8	card;
> +	__u16	module;
> +	__u16	bank;
> +	__u32	device;
> +	__u32	row;
> +	__u32	column;
> +	__u32	rank;
> +	__u8	bit_pos;
> +	__u8	chip_id;
> +	__u8	pool_specific_type;
> +	__u32	vendor_data[];
> +};
> +
> +struct cper_ccix_mem_error {
> +	struct cper_sec_ccix_header header;
> +	__u32 ccix_header[CCIX_PER_LOG_HEADER_DWS];
> +	struct cper_sec_ccix_mem_error mem_record;
> +};
> +
> +static inline u16 ccix_mem_err_ven_len_get(struct cper_ccix_mem_error *mem_err)
> +{
> +	if (mem_err->mem_record.validation_bits &
> +	    CCIX_MEM_ERR_VENDOR_DATA_VALID)
> +		return mem_err->mem_record.vendor_data[0] & 0xFFFF;
> +	else
> +		return 0;
> +}
> +
> +struct cper_ccix_mem_err_compact {
> +	__u32	validation_bits;
> +	__u8	mem_err_type;
> +	__u8	pool_generic_type;
> +	__u8	pool_specific_type;
> +	__u8	op_type;
> +	__u8	card;
> +	__u16	module;
> +	__u16	bank;
> +	__u32	device;
> +	__u32	row;
> +	__u32	column;
> +	__u32	rank;
> +	__u8	bit_pos;
> +	__u8	chip_id;
> +	__u8	fru;
> +};
> +
>  /* Reset to default packing */
>  #pragma pack()
>  
> @@ -535,6 +641,18 @@ void cper_mem_err_pack(const struct cper_sec_mem_err *,
>  		       struct cper_mem_err_compact *);
>  const char *cper_mem_err_unpack(struct trace_seq *,
>  				struct cper_mem_err_compact *);
> +void cper_ccix_mem_err_pack(const struct cper_sec_ccix_mem_error *mem_record,
> +			    struct cper_ccix_mem_err_compact *cmem_err,
> +			    const u16 vendor_data_len,
> +			    u8 *vendor_data);
> +const char *cper_ccix_mem_err_unpack(struct trace_seq *p,
> +				     struct cper_ccix_mem_err_compact *cmem_err);
> +const char *cper_ccix_mem_err_type_str(unsigned int error_type);
> +const char *cper_ccix_comp_type_str(u8 comp_type);
> +struct acpi_hest_generic_data;
> +int cper_print_ccix_per(const char *pfx,
> +			struct acpi_hest_generic_data *gdata);
> +
>  void cper_print_proc_arm(const char *pfx,
>  			 const struct cper_sec_proc_arm *proc);
>  void cper_print_proc_ia(const char *pfx,
> diff --git a/include/ras/ras_event.h b/include/ras/ras_event.h
> index 36c5c5e38c1d..560e55958561 100644
> --- a/include/ras/ras_event.h
> +++ b/include/ras/ras_event.h
> @@ -14,6 +14,7 @@
>  #include <linux/cper.h>
>  #include <linux/mm.h>
>  
> +#include <linux/bitfield.h>
>  /*
>   * MCE Extended Error Log trace event
>   *
> @@ -338,6 +339,84 @@ TRACE_EVENT(aer_event,
>  			"Not available")
>  );
>  
> +#if defined(CONFIG_ACPI_APEI_CCIX)
> +/*
> + * CCIX PER log memory error trace event
> + *
> + * These events are generated when hardware detects a corrected or
> + * uncorrected event.
> + *
> + * Some elements of the record are not included
> + * - PER version (tracepoint should remain compatible across versions)
> + * - Multiple Error
> + */
> +TRACE_EVENT(ccix_memory_error_event,
> +	TP_PROTO(struct cper_ccix_mem_error *mem,
> +		 u32 err_seq,
> +		 u8 sev,
> +		 u16 ven_len),
> +
> +	TP_ARGS(mem, err_seq, sev, ven_len),
> +
> +	TP_STRUCT__entry(
> +		__field(u32, err_seq)
> +		__field(u8, sev)
> +		__field(u8, sevdetail)
> +		__field(u8, source)
> +		__field(u8, component)
> +		__field(u64, pa)
> +		__field(u8, pa_mask_lsb)
> +		__field_struct(struct cper_ccix_mem_err_compact, data)
> +		__field(u16, vendor_data_length)
> +		__dynamic_array(u8, vendor_data, ven_len)
> +	),
> +
> +	TP_fast_assign(
> +		__entry->err_seq = err_seq;
> +		__entry->sev = sev;
> +		__entry->sevdetail =
> +			FIELD_GET(CCIX_PER_LOG_DW1_SEV_UE_M |
> +				  CCIX_PER_LOG_DW1_SEV_NO_COMM_M |
> +				  CCIX_PER_LOG_DW1_SEV_DEGRADED_M |
> +				  CCIX_PER_LOG_DW1_SEV_DEFFERABLE_M,
> +						   mem->ccix_header[1]);
> +		if (mem->header.validation_bits & 0x1)
> +			__entry->source = mem->header.source_id;
> +		else
> +			__entry->source = ~0;
> +		__entry->component = FIELD_GET(CCIX_PER_LOG_DW1_COMP_TYPE_M,
> +					       mem->ccix_header[1]);
> +		if (mem->ccix_header[1] & CCIX_PER_LOG_DW1_ADDR_VAL_M) {
> +			__entry->pa = (u64)mem->ccix_header[2] << 32 |
> +				(mem->ccix_header[3] & 0xfffffffc);
> +			__entry->pa_mask_lsb = mem->ccix_header[4] & 0xff;
> +		} else {
> +			__entry->pa = ~0ull;
> +			__entry->pa_mask_lsb = ~0;
> +		}
> +		__entry->vendor_data_length = ven_len ? ven_len - 4 : 0;
> +		cper_ccix_mem_err_pack(&mem->mem_record, &__entry->data,
> +				       __entry->vendor_data_length,
> +				       __get_dynamic_array(vendor_data));
> +	),
> +
> +	TP_printk("{%d} %s CCIX PER Memory Error in %s SevUE:%d SevNoComm:%d SevDegraded:%d SevDeferred:%d physical addr: %016llx (mask: %x) %s vendor:%s",
> +		__entry->err_seq,
> +		cper_severity_str(__entry->sev),
> +		cper_ccix_comp_type_str(__entry->component),
> +		  __entry->sevdetail & BIT(0) ? 1 : 0,
> +		  __entry->sevdetail & BIT(1) ? 1 : 0,
> +		  __entry->sevdetail & BIT(2) ? 1 : 0,
> +		  __entry->sevdetail & BIT(3) ? 1 : 0,
> +		__entry->pa,
> +		__entry->pa_mask_lsb,
> +		cper_ccix_mem_err_unpack(p, &__entry->data),
> +		__print_hex(__get_dynamic_array(vendor_data),
> +			    __entry->vendor_data_length)
> +	)
> +);
> +#endif
> +
>  /*
>   * memory-failure recovery action result event
>   *




Cheers,
Mauro