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[PATCH 2/4] efi/cper, cxl: Make definitions and structures global

Smita Koralahalli posted 4 patches 1 year, 11 months ago
There is a newer version of this series
[PATCH 2/4] efi/cper, cxl: Make definitions and structures global
Posted by Smita Koralahalli 1 year, 11 months ago 
In preparation to add tracepoint support, move protocol error UUID
definition to a common location and make CXL RAS capability struct
global for use across different modules.

Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
---
 drivers/firmware/efi/cper_cxl.c | 11 -----------
 drivers/firmware/efi/cper_cxl.h |  7 ++-----
 include/linux/cper.h            |  4 ++++
 include/linux/cxl-event.h       | 11 +++++++++++
 4 files changed, 17 insertions(+), 16 deletions(-)

diff --git a/drivers/firmware/efi/cper_cxl.c b/drivers/firmware/efi/cper_cxl.c
index a55771b99a97..4fd8d783993e 100644
--- a/drivers/firmware/efi/cper_cxl.c
+++ b/drivers/firmware/efi/cper_cxl.c
@@ -18,17 +18,6 @@
 #define PROT_ERR_VALID_DVSEC			BIT_ULL(5)
 #define PROT_ERR_VALID_ERROR_LOG		BIT_ULL(6)
 
-/* CXL RAS Capability Structure, CXL v3.0 sec 8.2.4.16 */
-struct cxl_ras_capability_regs {
-	u32 uncor_status;
-	u32 uncor_mask;
-	u32 uncor_severity;
-	u32 cor_status;
-	u32 cor_mask;
-	u32 cap_control;
-	u32 header_log[16];
-};
-
 static const char * const prot_err_agent_type_strs[] = {
 	"Restricted CXL Device",
 	"Restricted CXL Host Downstream Port",
diff --git a/drivers/firmware/efi/cper_cxl.h b/drivers/firmware/efi/cper_cxl.h
index 86bfcf7909ec..6f8c00495708 100644
--- a/drivers/firmware/efi/cper_cxl.h
+++ b/drivers/firmware/efi/cper_cxl.h
@@ -7,14 +7,11 @@
  * Author: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
  */
 
+#include <linux/cxl-event.h>
+
 #ifndef LINUX_CPER_CXL_H
 #define LINUX_CPER_CXL_H
 
-/* CXL Protocol Error Section */
-#define CPER_SEC_CXL_PROT_ERR						\
-	GUID_INIT(0x80B9EFB4, 0x52B5, 0x4DE3, 0xA7, 0x77, 0x68, 0x78,	\
-		  0x4B, 0x77, 0x10, 0x48)
-
 #pragma pack(1)
 
 /* Compute Express Link Protocol Error Section, UEFI v2.10 sec N.2.13 */
diff --git a/include/linux/cper.h b/include/linux/cper.h
index c1a7dc325121..2cbf0a93785a 100644
--- a/include/linux/cper.h
+++ b/include/linux/cper.h
@@ -89,6 +89,10 @@ enum {
 #define CPER_NOTIFY_DMAR						\
 	GUID_INIT(0x667DD791, 0xC6B3, 0x4c27, 0x8A, 0x6B, 0x0F, 0x8E,	\
 		  0x72, 0x2D, 0xEB, 0x41)
+/* CXL Protocol Error Section */
+#define CPER_SEC_CXL_PROT_ERR						\
+	GUID_INIT(0x80B9EFB4, 0x52B5, 0x4DE3, 0xA7, 0x77, 0x68, 0x78,	\
+		  0x4B, 0x77, 0x10, 0x48)
 
 /*
  * Flags bits definitions for flags in struct cper_record_header
diff --git a/include/linux/cxl-event.h b/include/linux/cxl-event.h
index afa71ee0437c..90d8390a73cb 100644
--- a/include/linux/cxl-event.h
+++ b/include/linux/cxl-event.h
@@ -141,6 +141,17 @@ struct cxl_cper_event_rec {
 	union cxl_event event;
 } __packed;
 
+/* CXL RAS Capability Structure, CXL v3.0 sec 8.2.4.16 */
+struct cxl_ras_capability_regs {
+	u32 uncor_status;
+	u32 uncor_mask;
+	u32 uncor_severity;
+	u32 cor_status;
+	u32 cor_mask;
+	u32 cap_control;
+	u32 header_log[16];
+};
+
 struct cxl_cper_rec_data {
 	struct cxl_cper_event_rec rec;
 };
-- 
2.17.1
Re: [PATCH 2/4] efi/cper, cxl: Make definitions and structures global
Posted by Ira Weiny 1 year, 11 months ago 
Smita Koralahalli wrote:
> In preparation to add tracepoint support, move protocol error UUID
> definition to a common location and make CXL RAS capability struct
> global for use across different modules.
> 
> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>

[snip]

> diff --git a/drivers/firmware/efi/cper_cxl.h b/drivers/firmware/efi/cper_cxl.h
> index 86bfcf7909ec..6f8c00495708 100644
> --- a/drivers/firmware/efi/cper_cxl.h
> +++ b/drivers/firmware/efi/cper_cxl.h
> @@ -7,14 +7,11 @@
>   * Author: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
>   */
>  
> +#include <linux/cxl-event.h>
> +
>  #ifndef LINUX_CPER_CXL_H
>  #define LINUX_CPER_CXL_H
>  
> -/* CXL Protocol Error Section */
> -#define CPER_SEC_CXL_PROT_ERR						\
> -	GUID_INIT(0x80B9EFB4, 0x52B5, 0x4DE3, 0xA7, 0x77, 0x68, 0x78,	\
> -		  0x4B, 0x77, 0x10, 0x48)
> -
>  #pragma pack(1)
>  
>  /* Compute Express Link Protocol Error Section, UEFI v2.10 sec N.2.13 */
> diff --git a/include/linux/cper.h b/include/linux/cper.h
> index c1a7dc325121..2cbf0a93785a 100644
> --- a/include/linux/cper.h
> +++ b/include/linux/cper.h
> @@ -89,6 +89,10 @@ enum {
>  #define CPER_NOTIFY_DMAR						\
>  	GUID_INIT(0x667DD791, 0xC6B3, 0x4c27, 0x8A, 0x6B, 0x0F, 0x8E,	\
>  		  0x72, 0x2D, 0xEB, 0x41)
> +/* CXL Protocol Error Section */
> +#define CPER_SEC_CXL_PROT_ERR						\
> +	GUID_INIT(0x80B9EFB4, 0x52B5, 0x4DE3, 0xA7, 0x77, 0x68, 0x78,	\
> +		  0x4B, 0x77, 0x10, 0x48)

Is this shared with code outside of GHES?  I did not need my GUID defines
outside of ghes.c and further becuase the events are defined as UUID's I
chose to keep the GUID definition as local as possible to ghes.c.

Can you do the same with this define?

The rest looks good,
Ira

[snip]
Re: [PATCH 2/4] efi/cper, cxl: Make definitions and structures global
Posted by Smita Koralahalli 1 year, 11 months ago 
On 1/2/2024 8:30 AM, Ira Weiny wrote:
> Smita Koralahalli wrote:
>> In preparation to add tracepoint support, move protocol error UUID
>> definition to a common location and make CXL RAS capability struct
>> global for use across different modules.
>>
>> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
> 
> [snip]
> 
>> diff --git a/drivers/firmware/efi/cper_cxl.h b/drivers/firmware/efi/cper_cxl.h
>> index 86bfcf7909ec..6f8c00495708 100644
>> --- a/drivers/firmware/efi/cper_cxl.h
>> +++ b/drivers/firmware/efi/cper_cxl.h
>> @@ -7,14 +7,11 @@
>>    * Author: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
>>    */
>>   
>> +#include <linux/cxl-event.h>
>> +
>>   #ifndef LINUX_CPER_CXL_H
>>   #define LINUX_CPER_CXL_H
>>   
>> -/* CXL Protocol Error Section */
>> -#define CPER_SEC_CXL_PROT_ERR						\
>> -	GUID_INIT(0x80B9EFB4, 0x52B5, 0x4DE3, 0xA7, 0x77, 0x68, 0x78,	\
>> -		  0x4B, 0x77, 0x10, 0x48)
>> -
>>   #pragma pack(1)
>>   
>>   /* Compute Express Link Protocol Error Section, UEFI v2.10 sec N.2.13 */
>> diff --git a/include/linux/cper.h b/include/linux/cper.h
>> index c1a7dc325121..2cbf0a93785a 100644
>> --- a/include/linux/cper.h
>> +++ b/include/linux/cper.h
>> @@ -89,6 +89,10 @@ enum {
>>   #define CPER_NOTIFY_DMAR						\
>>   	GUID_INIT(0x667DD791, 0xC6B3, 0x4c27, 0x8A, 0x6B, 0x0F, 0x8E,	\
>>   		  0x72, 0x2D, 0xEB, 0x41)
>> +/* CXL Protocol Error Section */
>> +#define CPER_SEC_CXL_PROT_ERR						\
>> +	GUID_INIT(0x80B9EFB4, 0x52B5, 0x4DE3, 0xA7, 0x77, 0x68, 0x78,	\
>> +		  0x4B, 0x77, 0x10, 0x48)
> 
> Is this shared with code outside of GHES?  I did not need my GUID defines
> outside of ghes.c and further becuase the events are defined as UUID's I
> chose to keep the GUID definition as local as possible to ghes.c.
> 
> Can you do the same with this define?

Actually, it is shared with efi/cper.
https://elixir.bootlin.com/linux/v6.7-rc8/source/drivers/firmware/efi/cper.c#L602

But this would be something to look into. Should we continue to support 
logging from efi/cper or just confine it to ghes..

If we just log it from ghes similar to component events, we might loose 
error records from RCH Downstream Port and other agent_types which do 
not log device_ids. Also, I'm not sure how useful are other fields in 
protocol error CPER, the ones like Capability struct and DVSEC len etc 
as the tracepoints doesn't log all of them.

Thanks,
Smita

> 
> The rest looks good,
> Ira
> 
> [snip]
>
Re: [PATCH 2/4] efi/cper, cxl: Make definitions and structures global
Posted by Ira Weiny 1 year, 11 months ago 
Smita Koralahalli wrote:
> On 1/2/2024 8:30 AM, Ira Weiny wrote:
> > Smita Koralahalli wrote:
> >> In preparation to add tracepoint support, move protocol error UUID
> >> definition to a common location and make CXL RAS capability struct
> >> global for use across different modules.
> >>
> >> Signed-off-by: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
> > 
> > [snip]
> > 
> >> diff --git a/drivers/firmware/efi/cper_cxl.h b/drivers/firmware/efi/cper_cxl.h
> >> index 86bfcf7909ec..6f8c00495708 100644
> >> --- a/drivers/firmware/efi/cper_cxl.h
> >> +++ b/drivers/firmware/efi/cper_cxl.h
> >> @@ -7,14 +7,11 @@
> >>    * Author: Smita Koralahalli <Smita.KoralahalliChannabasappa@amd.com>
> >>    */
> >>   
> >> +#include <linux/cxl-event.h>
> >> +
> >>   #ifndef LINUX_CPER_CXL_H
> >>   #define LINUX_CPER_CXL_H
> >>   
> >> -/* CXL Protocol Error Section */
> >> -#define CPER_SEC_CXL_PROT_ERR						\
> >> -	GUID_INIT(0x80B9EFB4, 0x52B5, 0x4DE3, 0xA7, 0x77, 0x68, 0x78,	\
> >> -		  0x4B, 0x77, 0x10, 0x48)
> >> -
> >>   #pragma pack(1)
> >>   
> >>   /* Compute Express Link Protocol Error Section, UEFI v2.10 sec N.2.13 */
> >> diff --git a/include/linux/cper.h b/include/linux/cper.h
> >> index c1a7dc325121..2cbf0a93785a 100644
> >> --- a/include/linux/cper.h
> >> +++ b/include/linux/cper.h
> >> @@ -89,6 +89,10 @@ enum {
> >>   #define CPER_NOTIFY_DMAR						\
> >>   	GUID_INIT(0x667DD791, 0xC6B3, 0x4c27, 0x8A, 0x6B, 0x0F, 0x8E,	\
> >>   		  0x72, 0x2D, 0xEB, 0x41)
> >> +/* CXL Protocol Error Section */
> >> +#define CPER_SEC_CXL_PROT_ERR						\
> >> +	GUID_INIT(0x80B9EFB4, 0x52B5, 0x4DE3, 0xA7, 0x77, 0x68, 0x78,	\
> >> +		  0x4B, 0x77, 0x10, 0x48)
> > 
> > Is this shared with code outside of GHES?  I did not need my GUID defines
> > outside of ghes.c and further becuase the events are defined as UUID's I
> > chose to keep the GUID definition as local as possible to ghes.c.
> > 
> > Can you do the same with this define?
> 
> Actually, it is shared with efi/cper.
> https://elixir.bootlin.com/linux/v6.7-rc8/source/drivers/firmware/efi/cper.c#L602

Ah ok.

> 
> But this would be something to look into. Should we continue to support 
> logging from efi/cper or just confine it to ghes..

I missed that you were not removing the efi/cper print.  I kind of thought
that was part of the series.

> 
> If we just log it from ghes similar to component events, we might loose 
> error records from RCH Downstream Port and other agent_types which do 
> not log device_ids.

That is a good reason to keep the efi/cper print AFAICS.

> Also, I'm not sure how useful are other fields in 
> protocol error CPER, the ones like Capability struct and DVSEC len etc 
> as the tracepoints doesn't log all of them.

I'm not sure about their importance but if they are important I would say
they should be added to the tracepoint.

Ira

Patchew 2.1-devel-b67e4c2

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