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De Francesco" To: linux-cxl@vger.kernel.org Cc: Rafael J Wysocki , Len Brown , Tony Luck , Borislav Petkov , Hanjun Guo , Mauro Carvalho Chehab , Shuai Xue , Davidlohr Bueso , Jonathan Cameron , Dave Jiang , Alison Schofield , Vishal Verma , Ira Weiny , Dan Williams , Mahesh J Salgaonkar , Oliver O'Halloran , Bjorn Helgaas , linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-pci@vger.kernel.org, "Fabio M. De Francesco" Subject: [PATCH 4/5 v9] acpi/ghes: Add helper to copy CPER CXL protocol error info to work struct Date: Wed, 14 Jan 2026 11:14:24 +0100 Message-ID: <20260114101543.85926-5-fabio.m.de.francesco@linux.intel.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260114101543.85926-1-fabio.m.de.francesco@linux.intel.com> References: <20260114101543.85926-1-fabio.m.de.francesco@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Make a helper out of cxl_cper_post_prot_err() that checks the CXL agent type and copy the CPER CXL protocol errors information to a work data structure. Export the new symbol for reuse by ELOG. Reviewed-by: Dave Jiang Reviewed-by: Jonathan Cameron Reviewed-by: Hanjun Guo Signed-off-by: Fabio M. De Francesco --- drivers/acpi/apei/ghes.c | 22 +-------------------- drivers/acpi/apei/ghes_helpers.c | 33 ++++++++++++++++++++++++++++++++ include/cxl/event.h | 10 ++++++++++ 3 files changed, 44 insertions(+), 21 deletions(-) diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c index cc4cc7ee8422d..79755587871fa 100644 --- a/drivers/acpi/apei/ghes.c +++ b/drivers/acpi/apei/ghes.c @@ -711,7 +711,6 @@ static void cxl_cper_post_prot_err(struct cxl_cper_sec_= prot_err *prot_err, { #ifdef CONFIG_ACPI_APEI_PCIEAER struct cxl_cper_prot_err_work_data wd; - u8 *dvsec_start, *cap_start; =20 if (cxl_cper_sec_prot_err_valid(prot_err)) return; @@ -721,27 +720,8 @@ static void cxl_cper_post_prot_err(struct cxl_cper_sec= _prot_err *prot_err, if (!cxl_cper_prot_err_work) return; =20 - switch (prot_err->agent_type) { - case RCD: - case DEVICE: - case LD: - case FMLD: - case RP: - case DSP: - case USP: - memcpy(&wd.prot_err, prot_err, sizeof(wd.prot_err)); - - dvsec_start =3D (u8 *)(prot_err + 1); - cap_start =3D dvsec_start + prot_err->dvsec_len; - - memcpy(&wd.ras_cap, cap_start, sizeof(wd.ras_cap)); - wd.severity =3D cper_severity_to_aer(severity); - break; - default: - pr_err_ratelimited("CXL CPER invalid agent type: %d\n", - prot_err->agent_type); + if (cxl_cper_setup_prot_err_work_data(&wd, prot_err, severity)) return; - } =20 if (!kfifo_put(&cxl_cper_prot_err_fifo, wd)) { pr_err_ratelimited("CXL CPER kfifo overflow\n"); diff --git a/drivers/acpi/apei/ghes_helpers.c b/drivers/acpi/apei/ghes_help= ers.c index f3d162139a974..bc7111b740afb 100644 --- a/drivers/acpi/apei/ghes_helpers.c +++ b/drivers/acpi/apei/ghes_helpers.c @@ -2,6 +2,7 @@ // Copyright(c) 2025 Intel Corporation. All rights reserved =20 #include +#include #include =20 int cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot_err *prot_err) @@ -31,3 +32,35 @@ int cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot= _err *prot_err) return 0; } EXPORT_SYMBOL_GPL(cxl_cper_sec_prot_err_valid); + +int cxl_cper_setup_prot_err_work_data(struct cxl_cper_prot_err_work_data *= wd, + struct cxl_cper_sec_prot_err *prot_err, + int severity) +{ + u8 *dvsec_start, *cap_start; + + switch (prot_err->agent_type) { + case RCD: + case DEVICE: + case LD: + case FMLD: + case RP: + case DSP: + case USP: + memcpy(&wd->prot_err, prot_err, sizeof(wd->prot_err)); + + dvsec_start =3D (u8 *)(prot_err + 1); + cap_start =3D dvsec_start + prot_err->dvsec_len; + + memcpy(&wd->ras_cap, cap_start, sizeof(wd->ras_cap)); + wd->severity =3D cper_severity_to_aer(severity); + break; + default: + pr_err_ratelimited("CXL CPER invalid agent type: %d\n", + prot_err->agent_type); + return -EINVAL; + } + + return 0; +} +EXPORT_SYMBOL_GPL(cxl_cper_setup_prot_err_work_data); diff --git a/include/cxl/event.h b/include/cxl/event.h index 4d7d1036ea9cb..94081aec597ae 100644 --- a/include/cxl/event.h +++ b/include/cxl/event.h @@ -322,12 +322,22 @@ static inline int cxl_cper_prot_err_kfifo_get(struct = cxl_cper_prot_err_work_data =20 #ifdef CONFIG_ACPI_APEI_PCIEAER int cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot_err *prot_err); +int cxl_cper_setup_prot_err_work_data(struct cxl_cper_prot_err_work_data *= wd, + struct cxl_cper_sec_prot_err *prot_err, + int severity); #else static inline int cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot_err *prot_err) { return -EOPNOTSUPP; } +static inline int +cxl_cper_setup_prot_err_work_data(struct cxl_cper_prot_err_work_data *wd, + struct cxl_cper_sec_prot_err *prot_err, + int severity) +{ + return -EOPNOTSUPP; +} #endif =20 #endif /* _LINUX_CXL_EVENT_H */ --=20 2.52.0