Move the CPER CXL protocol errors validity check out of cxl_cper_post_prot_err() to new cxl_cper_sec_prot_err_valid() and limit the serial number check only to CXL agents that are CXL devices (UEFI v2.10, Appendix N.2.13).
Export the new symbol for reuse by ELOG. Reviewed-by: Dave Jiang <[email protected]> Reviewed-by: Hanjun Guo <[email protected]> Reviewed-by: Jonathan Cameron <[email protected]> Signed-off-by: Fabio M. De Francesco <[email protected]> --- drivers/acpi/apei/Makefile | 1 + drivers/acpi/apei/ghes.c | 18 +----------------- drivers/acpi/apei/ghes_helpers.c | 32 ++++++++++++++++++++++++++++++++ include/cxl/event.h | 10 ++++++++++ 4 files changed, 44 insertions(+), 17 deletions(-) create mode 100644 drivers/acpi/apei/ghes_helpers.c diff --git a/drivers/acpi/apei/Makefile b/drivers/acpi/apei/Makefile index 2c474e6477e12..5db61dfb46915 100644 --- a/drivers/acpi/apei/Makefile +++ b/drivers/acpi/apei/Makefile @@ -1,6 +1,7 @@ # SPDX-License-Identifier: GPL-2.0 obj-$(CONFIG_ACPI_APEI) += apei.o obj-$(CONFIG_ACPI_APEI_GHES) += ghes.o +obj-$(CONFIG_ACPI_APEI_PCIEAER) += ghes_helpers.o obj-$(CONFIG_ACPI_APEI_EINJ) += einj.o einj-y := einj-core.o einj-$(CONFIG_ACPI_APEI_EINJ_CXL) += einj-cxl.o diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index 0dc767392a6c6..cc4cc7ee8422d 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -713,24 +713,8 @@ static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err, struct cxl_cper_prot_err_work_data wd; u8 *dvsec_start, *cap_start; - if (!(prot_err->valid_bits & PROT_ERR_VALID_AGENT_ADDRESS)) { - pr_err_ratelimited("CXL CPER invalid agent type\n"); + if (cxl_cper_sec_prot_err_valid(prot_err)) return; - } - - if (!(prot_err->valid_bits & PROT_ERR_VALID_ERROR_LOG)) { - pr_err_ratelimited("CXL CPER invalid protocol error log\n"); - return; - } - - if (prot_err->err_len != sizeof(struct cxl_ras_capability_regs)) { - pr_err_ratelimited("CXL CPER invalid RAS Cap size (%u)\n", - prot_err->err_len); - return; - } - - if (!(prot_err->valid_bits & PROT_ERR_VALID_SERIAL_NUMBER)) - pr_warn(FW_WARN "CXL CPER no device serial number\n"); guard(spinlock_irqsave)(&cxl_cper_prot_err_work_lock); diff --git a/drivers/acpi/apei/ghes_helpers.c b/drivers/acpi/apei/ghes_helpers.c new file mode 100644 index 0000000000000..e5f65f57d9ec7 --- /dev/null +++ b/drivers/acpi/apei/ghes_helpers.c @@ -0,0 +1,32 @@ +// SPDX-License-Identifier: GPL-2.0-only +// Copyright(c) 2025 Intel Corporation. All rights reserved + +#include <cxl/event.h> + +int cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot_err *prot_err) +{ + if (!(prot_err->valid_bits & PROT_ERR_VALID_AGENT_ADDRESS)) { + pr_err_ratelimited("CXL CPER invalid agent type\n"); + return -EINVAL; + } + + if (!(prot_err->valid_bits & PROT_ERR_VALID_ERROR_LOG)) { + pr_err_ratelimited("CXL CPER invalid protocol error log\n"); + return -EINVAL; + } + + if (prot_err->err_len != sizeof(struct cxl_ras_capability_regs)) { + pr_err_ratelimited("CXL CPER invalid RAS Cap size (%u)\n", + prot_err->err_len); + return -EINVAL; + } + + if ((prot_err->agent_type == RCD || prot_err->agent_type == DEVICE || + prot_err->agent_type == LD || prot_err->agent_type == FMLD) && + !(prot_err->valid_bits & PROT_ERR_VALID_SERIAL_NUMBER)) + pr_warn_ratelimited(FW_WARN + "CXL CPER no device serial number\n"); + + return 0; +} +EXPORT_SYMBOL_GPL(cxl_cper_sec_prot_err_valid); diff --git a/include/cxl/event.h b/include/cxl/event.h index 6fd90f9cc2034..4d7d1036ea9cb 100644 --- a/include/cxl/event.h +++ b/include/cxl/event.h @@ -320,4 +320,14 @@ static inline int cxl_cper_prot_err_kfifo_get(struct cxl_cper_prot_err_work_data } #endif +#ifdef CONFIG_ACPI_APEI_PCIEAER +int cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot_err *prot_err); +#else +static inline int +cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot_err *prot_err) +{ + return -EOPNOTSUPP; +} +#endif + #endif /* _LINUX_CXL_EVENT_H */ -- 2.52.0
