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[PATCH 5/6 v7] acpi/ghes: Add helper to copy CXL protocol error info to work struct

Fabio M. De Francesco posted 6 patches 1 month, 2 weeks ago
[PATCH 5/6 v7] acpi/ghes: Add helper to copy CXL protocol error info to work struct
Posted by Fabio M. De Francesco 1 month, 2 weeks ago 
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: Jonathan Cameron <jonathan.cameron@huawei.com>
Signed-off-by: Fabio M. De Francesco <fabio.m.de.francesco@linux.intel.com>
---
 drivers/acpi/apei/ghes.c | 42 ++++++++++++++++++++++++++--------------
 include/cxl/event.h      | 10 ++++++++++
 2 files changed, 37 insertions(+), 15 deletions(-)

diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
index e69ae864f43d..2f4632d9855a 100644
--- a/drivers/acpi/apei/ghes.c
+++ b/drivers/acpi/apei/ghes.c
@@ -734,20 +734,12 @@ int cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot_err *prot_err)
 }
 EXPORT_SYMBOL_GPL(cxl_cper_sec_prot_err_valid);
 
-static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err,
-				   int severity)
+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)
 {
-	struct cxl_cper_prot_err_work_data wd;
 	u8 *dvsec_start, *cap_start;
 
-	if (cxl_cper_sec_prot_err_valid(prot_err))
-		return;
-
-	guard(spinlock_irqsave)(&cxl_cper_prot_err_work_lock);
-
-	if (!cxl_cper_prot_err_work)
-		return;
-
 	switch (prot_err->agent_type) {
 	case RCD:
 	case DEVICE:
@@ -756,20 +748,40 @@ static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err,
 	case RP:
 	case DSP:
 	case USP:
-		memcpy(&wd.prot_err, prot_err, sizeof(wd.prot_err));
+		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);
+		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;
+		return -EINVAL;
 	}
 
+	return 0;
+}
+EXPORT_SYMBOL_GPL(cxl_cper_setup_prot_err_work_data);
+
+static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err,
+				   int severity)
+{
+	struct cxl_cper_prot_err_work_data wd;
+
+	if (cxl_cper_sec_prot_err_valid(prot_err))
+		return;
+
+	guard(spinlock_irqsave)(&cxl_cper_prot_err_work_lock);
+
+	if (!cxl_cper_prot_err_work)
+		return;
+
+	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");
 		return;
diff --git a/include/cxl/event.h b/include/cxl/event.h
index 4d7d1036ea9c..94081aec597a 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 */
-- 
2.51.1
Re: [PATCH 5/6 v7] acpi/ghes: Add helper to copy CXL protocol error info to work struct
Posted by Hanjun Guo 4 weeks ago 
On 2025/11/5 2:22, Fabio M. De Francesco wrote:
> 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: Jonathan Cameron <jonathan.cameron@huawei.com>
> Signed-off-by: Fabio M. De Francesco <fabio.m.de.francesco@linux.intel.com>
> ---
>   drivers/acpi/apei/ghes.c | 42 ++++++++++++++++++++++++++--------------
>   include/cxl/event.h      | 10 ++++++++++
>   2 files changed, 37 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
> index e69ae864f43d..2f4632d9855a 100644
> --- a/drivers/acpi/apei/ghes.c
> +++ b/drivers/acpi/apei/ghes.c
> @@ -734,20 +734,12 @@ int cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot_err *prot_err)
>   }
>   EXPORT_SYMBOL_GPL(cxl_cper_sec_prot_err_valid);
>   
> -static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err,
> -				   int severity)
> +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)
>   {
> -	struct cxl_cper_prot_err_work_data wd;
>   	u8 *dvsec_start, *cap_start;
>   
> -	if (cxl_cper_sec_prot_err_valid(prot_err))
> -		return;
> -
> -	guard(spinlock_irqsave)(&cxl_cper_prot_err_work_lock);
> -
> -	if (!cxl_cper_prot_err_work)
> -		return;
> -
>   	switch (prot_err->agent_type) {
>   	case RCD:
>   	case DEVICE:
> @@ -756,20 +748,40 @@ static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err,
>   	case RP:
>   	case DSP:
>   	case USP:
> -		memcpy(&wd.prot_err, prot_err, sizeof(wd.prot_err));
> +		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);
> +		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;
> +		return -EINVAL;
>   	}
>   
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(cxl_cper_setup_prot_err_work_data);
> +
> +static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err,
> +				   int severity)
> +{
> +	struct cxl_cper_prot_err_work_data wd;
> +
> +	if (cxl_cper_sec_prot_err_valid(prot_err))
> +		return;
> +
> +	guard(spinlock_irqsave)(&cxl_cper_prot_err_work_lock);
> +
> +	if (!cxl_cper_prot_err_work)
> +		return;
> +
> +	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");
>   		return;
> diff --git a/include/cxl/event.h b/include/cxl/event.h
> index 4d7d1036ea9c..94081aec597a 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 */

Reviewed-by: Hanjun Guo <guohanjun@huawei.com>

Thanks
Hanjun
Re: [PATCH 5/6 v7] acpi/ghes: Add helper to copy CXL protocol error info to work struct
Posted by Dave Jiang 1 month, 1 week ago 

On 11/4/25 11:22 AM, Fabio M. De Francesco wrote:
> 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: Jonathan Cameron <jonathan.cameron@huawei.com>
> Signed-off-by: Fabio M. De Francesco <fabio.m.de.francesco@linux.intel.com>

Reviewed-by: Dave Jiang <dave.jiang@intel.com>> ---
>  drivers/acpi/apei/ghes.c | 42 ++++++++++++++++++++++++++--------------
>  include/cxl/event.h      | 10 ++++++++++
>  2 files changed, 37 insertions(+), 15 deletions(-)
> 
> diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
> index e69ae864f43d..2f4632d9855a 100644
> --- a/drivers/acpi/apei/ghes.c
> +++ b/drivers/acpi/apei/ghes.c
> @@ -734,20 +734,12 @@ int cxl_cper_sec_prot_err_valid(struct cxl_cper_sec_prot_err *prot_err)
>  }
>  EXPORT_SYMBOL_GPL(cxl_cper_sec_prot_err_valid);
>  
> -static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err,
> -				   int severity)
> +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)
>  {
> -	struct cxl_cper_prot_err_work_data wd;
>  	u8 *dvsec_start, *cap_start;
>  
> -	if (cxl_cper_sec_prot_err_valid(prot_err))
> -		return;
> -
> -	guard(spinlock_irqsave)(&cxl_cper_prot_err_work_lock);
> -
> -	if (!cxl_cper_prot_err_work)
> -		return;
> -
>  	switch (prot_err->agent_type) {
>  	case RCD:
>  	case DEVICE:
> @@ -756,20 +748,40 @@ static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err,
>  	case RP:
>  	case DSP:
>  	case USP:
> -		memcpy(&wd.prot_err, prot_err, sizeof(wd.prot_err));
> +		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);
> +		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;
> +		return -EINVAL;
>  	}
>  
> +	return 0;
> +}
> +EXPORT_SYMBOL_GPL(cxl_cper_setup_prot_err_work_data);
> +
> +static void cxl_cper_post_prot_err(struct cxl_cper_sec_prot_err *prot_err,
> +				   int severity)
> +{
> +	struct cxl_cper_prot_err_work_data wd;
> +
> +	if (cxl_cper_sec_prot_err_valid(prot_err))
> +		return;
> +
> +	guard(spinlock_irqsave)(&cxl_cper_prot_err_work_lock);
> +
> +	if (!cxl_cper_prot_err_work)
> +		return;
> +
> +	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");
>  		return;
> diff --git a/include/cxl/event.h b/include/cxl/event.h
> index 4d7d1036ea9c..94081aec597a 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 */

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