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Message-ID: <20260114101543.85926-5-fabio.m.de.francesco@linux.intel.com>
Date: Wed, 14 Jan 2026 11:14:24 +0100
From: "Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>
To: linux-cxl@...r.kernel.org
Cc: Rafael J Wysocki <rafael@...nel.org>,
Len Brown <lenb@...nel.org>,
Tony Luck <tony.luck@...el.com>,
Borislav Petkov <bp@...en8.de>,
Hanjun Guo <guohanjun@...wei.com>,
Mauro Carvalho Chehab <mchehab@...nel.org>,
Shuai Xue <xueshuai@...ux.alibaba.com>,
Davidlohr Bueso <dave@...olabs.net>,
Jonathan Cameron <jonathan.cameron@...wei.com>,
Dave Jiang <dave.jiang@...el.com>,
Alison Schofield <alison.schofield@...el.com>,
Vishal Verma <vishal.l.verma@...el.com>,
Ira Weiny <ira.weiny@...el.com>,
Dan Williams <dan.j.williams@...el.com>,
Mahesh J Salgaonkar <mahesh@...ux.ibm.com>,
Oliver O'Halloran <oohall@...il.com>,
Bjorn Helgaas <bhelgaas@...gle.com>,
linux-kernel@...r.kernel.org,
linux-acpi@...r.kernel.org,
linuxppc-dev@...ts.ozlabs.org,
linux-pci@...r.kernel.org,
"Fabio M. De Francesco" <fabio.m.de.francesco@...ux.intel.com>
Subject: [PATCH 4/5 v9] acpi/ghes: Add helper to copy CPER CXL protocol error info to work struct
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 <dave.jiang@...el.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@...wei.com>
Reviewed-by: Hanjun Guo <guohanjun@...wei.com>
Signed-off-by: Fabio M. De Francesco <fabio.m.de.francesco@...ux.intel.com>
---
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;
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;
- 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 = (u8 *)(prot_err + 1);
- cap_start = dvsec_start + prot_err->dvsec_len;
-
- memcpy(&wd.ras_cap, cap_start, sizeof(wd.ras_cap));
- wd.severity = 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;
- }
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_helpers.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
#include <linux/printk.h>
+#include <linux/aer.h>
#include <cxl/event.h>
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 = (u8 *)(prot_err + 1);
+ cap_start = dvsec_start + prot_err->dvsec_len;
+
+ memcpy(&wd->ras_cap, cap_start, sizeof(wd->ras_cap));
+ wd->severity = 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
#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
#endif /* _LINUX_CXL_EVENT_H */
--
2.52.0
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