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[PATCH 4/8] ACPI: APEI: EINJ: Enable the discovery of EINJv2 capabilities

Zaid Alali posted 8 patches 1 month ago
There is a newer version of this series
[PATCH 4/8] ACPI: APEI: EINJ: Enable the discovery of EINJv2 capabilities
Posted by Zaid Alali 1 month ago 
Enable the driver to show all supported error injections for EINJ
and EINJv2 at the same time. EINJv2 capabilities can be discovered
by checking the return value of get_error_type, where bit 30 set
indicates EINJv2 support.

Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com>
---
 drivers/acpi/apei/apei-internal.h |  2 +-
 drivers/acpi/apei/einj-core.c     | 33 +++++++++++++++++++++++--------
 drivers/acpi/apei/einj-cxl.c      |  2 +-
 3 files changed, 27 insertions(+), 10 deletions(-)

diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h
index cd2766c69d78..9a3dbaeed39a 100644
--- a/drivers/acpi/apei/apei-internal.h
+++ b/drivers/acpi/apei/apei-internal.h
@@ -131,7 +131,7 @@ static inline u32 cper_estatus_len(struct acpi_hest_generic_status *estatus)
 
 int apei_osc_setup(void);
 
-int einj_get_available_error_type(u32 *type);
+int einj_get_available_error_type(u32 *type, int version);
 int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2, u64 param3,
 		      u64 param4);
 int einj_cxl_rch_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
diff --git a/drivers/acpi/apei/einj-core.c b/drivers/acpi/apei/einj-core.c
index 78c5a20115eb..3621f071a735 100644
--- a/drivers/acpi/apei/einj-core.c
+++ b/drivers/acpi/apei/einj-core.c
@@ -33,6 +33,7 @@
 #define SLEEP_UNIT_MAX		5000			/* 5ms */
 /* Firmware should respond within 1 seconds */
 #define FIRMWARE_TIMEOUT	(1 * USEC_PER_SEC)
+#define ACPI65_EINJV2_SUPP	BIT(30)
 #define ACPI5_VENDOR_BIT	BIT(31)
 #define MEM_ERROR_MASK		(ACPI_EINJ_MEMORY_CORRECTABLE | \
 				ACPI_EINJ_MEMORY_UNCORRECTABLE | \
@@ -84,6 +85,7 @@ static struct debugfs_blob_wrapper vendor_errors;
 static char vendor_dev[64];
 
 static u32 available_error_type;
+static u32 available_error_type_v2;
 
 /*
  * Some BIOSes allow parameters to the SET_ERROR_TYPE entries in the
@@ -159,13 +161,13 @@ static void einj_exec_ctx_init(struct apei_exec_context *ctx)
 			   EINJ_TAB_ENTRY(einj_tab), einj_tab->entries);
 }
 
-static int __einj_get_available_error_type(u32 *type)
+static int __einj_get_available_error_type(u32 *type, int version)
 {
 	struct apei_exec_context ctx;
 	int rc;
 
 	einj_exec_ctx_init(&ctx);
-	rc = apei_exec_run(&ctx, ACPI_EINJ_GET_ERROR_TYPE);
+	rc = apei_exec_run(&ctx, version);
 	if (rc)
 		return rc;
 	*type = apei_exec_ctx_get_output(&ctx);
@@ -174,12 +176,12 @@ static int __einj_get_available_error_type(u32 *type)
 }
 
 /* Get error injection capabilities of the platform */
-int einj_get_available_error_type(u32 *type)
+int einj_get_available_error_type(u32 *type, int version)
 {
 	int rc;
 
 	mutex_lock(&einj_mutex);
-	rc = __einj_get_available_error_type(type);
+	rc = __einj_get_available_error_type(type, version);
 	mutex_unlock(&einj_mutex);
 
 	return rc;
@@ -647,6 +649,11 @@ static struct { u32 mask; const char *str; } const einj_error_type_string[] = {
 	{ BIT(11), "Platform Uncorrectable fatal"},
 	{ BIT(31), "Vendor Defined Error Types" },
 };
+static struct { u32 mask; const char *str; } const einjv2_error_type_string[] = {
+	{ BIT(0), "EINJV2 Processor Error" },
+	{ BIT(1), "EINJV2 Memory Error" },
+	{ BIT(2), "EINJV2 PCI Express Error" },
+};
 
 static int available_error_type_show(struct seq_file *m, void *v)
 {
@@ -654,8 +661,13 @@ static int available_error_type_show(struct seq_file *m, void *v)
 	for (int pos = 0; pos < ARRAY_SIZE(einj_error_type_string); pos++)
 		if (available_error_type & einj_error_type_string[pos].mask)
 			seq_printf(m, "0x%08x\t%s\n", einj_error_type_string[pos].mask,
-				   einj_error_type_string[pos].str);
-
+					   einj_error_type_string[pos].str);
+	if (available_error_type & ACPI65_EINJV2_SUPP) {
+		for (int pos = 0; pos < ARRAY_SIZE(einjv2_error_type_string); pos++)
+			if (available_error_type_v2 & einjv2_error_type_string[pos].mask)
+				seq_printf(m, "0x%08x\t%s\n", einjv2_error_type_string[pos].mask,
+						   einjv2_error_type_string[pos].str);
+	}
 	return 0;
 }
 
@@ -692,7 +704,7 @@ int einj_validate_error_type(u64 type)
 	if (tval & (tval - 1))
 		return -EINVAL;
 	if (!vendor)
-		if (!(type & available_error_type))
+		if (!(type & (available_error_type)))
 			return -EINVAL;
 
 	return 0;
@@ -769,9 +781,14 @@ static int __init einj_probe(struct platform_device *pdev)
 		goto err_put_table;
 	}
 
-	rc = einj_get_available_error_type(&available_error_type);
+	rc = einj_get_available_error_type(&available_error_type, ACPI_EINJ_GET_ERROR_TYPE);
 	if (rc)
 		return rc;
+	if (available_error_type & ACPI65_EINJV2_SUPP) {
+		rc = einj_get_available_error_type(&available_error_type_v2, ACPI_EINJV2_GET_ERROR_TYPE);
+		if (rc)
+			return rc;
+	}
 
 	rc = -ENOMEM;
 	einj_debug_dir = debugfs_create_dir("einj", apei_get_debugfs_dir());
diff --git a/drivers/acpi/apei/einj-cxl.c b/drivers/acpi/apei/einj-cxl.c
index a4e709937236..5ffc4a162c70 100644
--- a/drivers/acpi/apei/einj-cxl.c
+++ b/drivers/acpi/apei/einj-cxl.c
@@ -30,7 +30,7 @@ int einj_cxl_available_error_type_show(struct seq_file *m, void *v)
 	int cxl_err, rc;
 	u32 available_error_type = 0;
 
-	rc = einj_get_available_error_type(&available_error_type);
+	rc = einj_get_available_error_type(&available_error_type, ACPI_EINJ_GET_ERROR_TYPE);
 	if (rc)
 		return rc;
 
-- 
2.34.1
Re: [PATCH 4/8] ACPI: APEI: EINJ: Enable the discovery of EINJv2 capabilities
Posted by John Allen 1 week ago 
On Tue, Oct 22, 2024 at 02:34:25PM -0700, Zaid Alali wrote:
> Enable the driver to show all supported error injections for EINJ
> and EINJv2 at the same time. EINJv2 capabilities can be discovered
> by checking the return value of get_error_type, where bit 30 set
> indicates EINJv2 support.
> 
> Signed-off-by: Zaid Alali <zaidal@os.amperecomputing.com>
> ---
>  drivers/acpi/apei/apei-internal.h |  2 +-
>  drivers/acpi/apei/einj-core.c     | 33 +++++++++++++++++++++++--------
>  drivers/acpi/apei/einj-cxl.c      |  2 +-
>  3 files changed, 27 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/acpi/apei/apei-internal.h b/drivers/acpi/apei/apei-internal.h
> index cd2766c69d78..9a3dbaeed39a 100644
> --- a/drivers/acpi/apei/apei-internal.h
> +++ b/drivers/acpi/apei/apei-internal.h
> @@ -131,7 +131,7 @@ static inline u32 cper_estatus_len(struct acpi_hest_generic_status *estatus)
>  
>  int apei_osc_setup(void);
>  
> -int einj_get_available_error_type(u32 *type);
> +int einj_get_available_error_type(u32 *type, int version);
>  int einj_error_inject(u32 type, u32 flags, u64 param1, u64 param2, u64 param3,
>  		      u64 param4);
>  int einj_cxl_rch_error_inject(u32 type, u32 flags, u64 param1, u64 param2,
> diff --git a/drivers/acpi/apei/einj-core.c b/drivers/acpi/apei/einj-core.c
> index 78c5a20115eb..3621f071a735 100644
> --- a/drivers/acpi/apei/einj-core.c
> +++ b/drivers/acpi/apei/einj-core.c
> @@ -33,6 +33,7 @@
>  #define SLEEP_UNIT_MAX		5000			/* 5ms */
>  /* Firmware should respond within 1 seconds */
>  #define FIRMWARE_TIMEOUT	(1 * USEC_PER_SEC)
> +#define ACPI65_EINJV2_SUPP	BIT(30)
>  #define ACPI5_VENDOR_BIT	BIT(31)
>  #define MEM_ERROR_MASK		(ACPI_EINJ_MEMORY_CORRECTABLE | \
>  				ACPI_EINJ_MEMORY_UNCORRECTABLE | \
> @@ -84,6 +85,7 @@ static struct debugfs_blob_wrapper vendor_errors;
>  static char vendor_dev[64];
>  
>  static u32 available_error_type;
> +static u32 available_error_type_v2;
>  
>  /*
>   * Some BIOSes allow parameters to the SET_ERROR_TYPE entries in the
> @@ -159,13 +161,13 @@ static void einj_exec_ctx_init(struct apei_exec_context *ctx)
>  			   EINJ_TAB_ENTRY(einj_tab), einj_tab->entries);
>  }
>  
> -static int __einj_get_available_error_type(u32 *type)
> +static int __einj_get_available_error_type(u32 *type, int version)
>  {
>  	struct apei_exec_context ctx;
>  	int rc;
>  
>  	einj_exec_ctx_init(&ctx);
> -	rc = apei_exec_run(&ctx, ACPI_EINJ_GET_ERROR_TYPE);
> +	rc = apei_exec_run(&ctx, version);
>  	if (rc)
>  		return rc;
>  	*type = apei_exec_ctx_get_output(&ctx);
> @@ -174,12 +176,12 @@ static int __einj_get_available_error_type(u32 *type)
>  }
>  
>  /* Get error injection capabilities of the platform */
> -int einj_get_available_error_type(u32 *type)
> +int einj_get_available_error_type(u32 *type, int version)
>  {
>  	int rc;
>  
>  	mutex_lock(&einj_mutex);
> -	rc = __einj_get_available_error_type(type);
> +	rc = __einj_get_available_error_type(type, version);
>  	mutex_unlock(&einj_mutex);
>  
>  	return rc;
> @@ -647,6 +649,11 @@ static struct { u32 mask; const char *str; } const einj_error_type_string[] = {
>  	{ BIT(11), "Platform Uncorrectable fatal"},
>  	{ BIT(31), "Vendor Defined Error Types" },
>  };
> +static struct { u32 mask; const char *str; } const einjv2_error_type_string[] = {
> +	{ BIT(0), "EINJV2 Processor Error" },
> +	{ BIT(1), "EINJV2 Memory Error" },
> +	{ BIT(2), "EINJV2 PCI Express Error" },
> +};
>  
>  static int available_error_type_show(struct seq_file *m, void *v)
>  {
> @@ -654,8 +661,13 @@ static int available_error_type_show(struct seq_file *m, void *v)
>  	for (int pos = 0; pos < ARRAY_SIZE(einj_error_type_string); pos++)
>  		if (available_error_type & einj_error_type_string[pos].mask)
>  			seq_printf(m, "0x%08x\t%s\n", einj_error_type_string[pos].mask,
> -				   einj_error_type_string[pos].str);
> -
> +					   einj_error_type_string[pos].str);

This looks like it may have been unintentional. Alignment of the above
line should be left alone and the newline kept.

> +	if (available_error_type & ACPI65_EINJV2_SUPP) {
> +		for (int pos = 0; pos < ARRAY_SIZE(einjv2_error_type_string); pos++)
> +			if (available_error_type_v2 & einjv2_error_type_string[pos].mask)
> +				seq_printf(m, "0x%08x\t%s\n", einjv2_error_type_string[pos].mask,
> +						   einjv2_error_type_string[pos].str);

Similarly, the above line should be aligned as the other one was
previously:

				seq_printf(m, "0x%08x\t%s\n", einj_error_type_string[pos].mask,
					   einjv2_error_type_string[pos].str);

> +	}
>  	return 0;
>  }
>  
> @@ -692,7 +704,7 @@ int einj_validate_error_type(u64 type)
>  	if (tval & (tval - 1))
>  		return -EINVAL;
>  	if (!vendor)
> -		if (!(type & available_error_type))
> +		if (!(type & (available_error_type)))

Why are these extra parens being added? Is there a reason for this?

>  			return -EINVAL;
>  
>  	return 0;
> @@ -769,9 +781,14 @@ static int __init einj_probe(struct platform_device *pdev)
>  		goto err_put_table;
>  	}
>  
> -	rc = einj_get_available_error_type(&available_error_type);
> +	rc = einj_get_available_error_type(&available_error_type, ACPI_EINJ_GET_ERROR_TYPE);
>  	if (rc)
>  		return rc;
> +	if (available_error_type & ACPI65_EINJV2_SUPP) {
> +		rc = einj_get_available_error_type(&available_error_type_v2, ACPI_EINJV2_GET_ERROR_TYPE);

checkpatch.pl complains about the above line being longer the 100 chars.
This should be broken up.

Thanks,
John

> +		if (rc)
> +			return rc;
> +	}
>  
>  	rc = -ENOMEM;
>  	einj_debug_dir = debugfs_create_dir("einj", apei_get_debugfs_dir());
> diff --git a/drivers/acpi/apei/einj-cxl.c b/drivers/acpi/apei/einj-cxl.c
> index a4e709937236..5ffc4a162c70 100644
> --- a/drivers/acpi/apei/einj-cxl.c
> +++ b/drivers/acpi/apei/einj-cxl.c
> @@ -30,7 +30,7 @@ int einj_cxl_available_error_type_show(struct seq_file *m, void *v)
>  	int cxl_err, rc;
>  	u32 available_error_type = 0;
>  
> -	rc = einj_get_available_error_type(&available_error_type);
> +	rc = einj_get_available_error_type(&available_error_type, ACPI_EINJ_GET_ERROR_TYPE);
>  	if (rc)
>  		return rc;
>  
> -- 
> 2.34.1
>
Re: [PATCH 4/8] ACPI: APEI: EINJ: Enable the discovery of EINJv2 capabilities
Posted by Tony Luck 1 month ago 
On Tue, Oct 22, 2024 at 02:34:25PM -0700, Zaid Alali wrote:
> @@ -692,7 +704,7 @@ int einj_validate_error_type(u64 type)
>  	if (tval & (tval - 1))
>  		return -EINVAL;
>  	if (!vendor)
> -		if (!(type & available_error_type))
> +		if (!(type & (available_error_type)))

Extra parentheses around available_error_type not needed.

-Tony

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