diff mbox series

[v3,9/9] platform/x86/intel/ifs: ARRAY BIST for Sierra Forest

Message ID 20230929202436.2850388-10-jithu.joseph@intel.com (mailing list archive)
State Changes Requested, archived
Headers show
Series IFS support for GNR and SRF | expand

Commit Message

Joseph, Jithu Sept. 29, 2023, 8:24 p.m. UTC 
Array BIST MSR addresses, bit definition and semantics are different for
Sierra Forest. Branch into a separate Array BIST flow on Sierra Forest
when user invokes Array Test.

Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Tested-by: Pengfei Xu <pengfei.xu@intel.com>
---
 drivers/platform/x86/intel/ifs/ifs.h     |  4 +++
 drivers/platform/x86/intel/ifs/core.c    | 15 +++++-----
 drivers/platform/x86/intel/ifs/runtest.c | 37 +++++++++++++++++++++++-
 3 files changed, 48 insertions(+), 8 deletions(-)

Comments

Ilpo Järvinen Oct. 2, 2023, 11:59 a.m. UTC | #1 
On Fri, 29 Sep 2023, Jithu Joseph wrote:

> Array BIST MSR addresses, bit definition and semantics are different for
> Sierra Forest. Branch into a separate Array BIST flow on Sierra Forest
> when user invokes Array Test.
> 
> Signed-off-by: Jithu Joseph <jithu.joseph@intel.com>
> Reviewed-by: Tony Luck <tony.luck@intel.com>
> Tested-by: Pengfei Xu <pengfei.xu@intel.com>
> ---
>  drivers/platform/x86/intel/ifs/ifs.h     |  4 +++
>  drivers/platform/x86/intel/ifs/core.c    | 15 +++++-----
>  drivers/platform/x86/intel/ifs/runtest.c | 37 +++++++++++++++++++++++-
>  3 files changed, 48 insertions(+), 8 deletions(-)
> 
> diff --git a/drivers/platform/x86/intel/ifs/ifs.h b/drivers/platform/x86/intel/ifs/ifs.h
> index f0dd849b3400..b183aba3ffdf 100644
> --- a/drivers/platform/x86/intel/ifs/ifs.h
> +++ b/drivers/platform/x86/intel/ifs/ifs.h
> @@ -137,6 +137,8 @@
>  #define MSR_CHUNKS_AUTHENTICATION_STATUS	0x000002c5
>  #define MSR_ACTIVATE_SCAN			0x000002c6
>  #define MSR_SCAN_STATUS				0x000002c7
> +#define MSR_ARRAY_TRIGGER			0x000002d6
> +#define MSR_ARRAY_STATUS			0x000002d7
>  #define MSR_SAF_CTRL				0x000004f0
>  
>  #define SCAN_NOT_TESTED				0
> @@ -272,6 +274,7 @@ struct ifs_test_caps {
>   * @cur_batch: number indicating the currently loaded test file
>   * @generation: IFS test generation enumerated by hardware
>   * @chunk_size: size of a test chunk
> + * @array_gen: test generation of array test
>   */
>  struct ifs_data {
>  	int	loaded_version;
> @@ -283,6 +286,7 @@ struct ifs_data {
>  	u32	cur_batch;
>  	u32	generation;
>  	u32	chunk_size;
> +	u32	array_gen;
>  };
>  
>  struct ifs_work {
> diff --git a/drivers/platform/x86/intel/ifs/core.c b/drivers/platform/x86/intel/ifs/core.c
> index 0c8927916373..934eaf348f9d 100644
> --- a/drivers/platform/x86/intel/ifs/core.c
> +++ b/drivers/platform/x86/intel/ifs/core.c
> @@ -11,16 +11,16 @@
>  
>  #include "ifs.h"
>  
> -#define X86_MATCH(model)				\
> +#define X86_MATCH(model, array_gen)				\
>  	X86_MATCH_VENDOR_FAM_MODEL_FEATURE(INTEL, 6,	\
> -		INTEL_FAM6_##model, X86_FEATURE_CORE_CAPABILITIES, NULL)
> +		INTEL_FAM6_##model, X86_FEATURE_CORE_CAPABILITIES, array_gen)
>  
>  static const struct x86_cpu_id ifs_cpu_ids[] __initconst = {
> -	X86_MATCH(SAPPHIRERAPIDS_X),
> -	X86_MATCH(EMERALDRAPIDS_X),
> -	X86_MATCH(GRANITERAPIDS_X),
> -	X86_MATCH(GRANITERAPIDS_D),
> -	X86_MATCH(ATOM_CRESTMONT_X),
> +	X86_MATCH(SAPPHIRERAPIDS_X, 0),
> +	X86_MATCH(EMERALDRAPIDS_X, 0),
> +	X86_MATCH(GRANITERAPIDS_X, 0),
> +	X86_MATCH(GRANITERAPIDS_D, 0),
> +	X86_MATCH(ATOM_CRESTMONT_X, 1),

Just a suggestion that would IMO make these easier to understand, you 
could name these array generations with defines so that one does not need 
to look what's defined in X86_MATCH() to understand the purpose of the 
second parameter. But it's up to you.
Joseph, Jithu Oct. 2, 2023, 11:01 p.m. UTC | #2 
On 10/2/2023 4:59 AM, Ilpo Järvinen wrote:

> 
> Just a suggestion that would IMO make these easier to understand, you 
> could name these array generations with defines so that one does not need 
> to look what's defined in X86_MATCH() to understand the purpose of the 
> second parameter. But it's up to you.
> 

I can make this change ... Thanks for the review

Jithu
diff mbox series

Patch

diff --git a/drivers/platform/x86/intel/ifs/ifs.h b/drivers/platform/x86/intel/ifs/ifs.h
index f0dd849b3400..b183aba3ffdf 100644
--- a/drivers/platform/x86/intel/ifs/ifs.h
+++ b/drivers/platform/x86/intel/ifs/ifs.h
@@ -137,6 +137,8 @@ 
 #define MSR_CHUNKS_AUTHENTICATION_STATUS	0x000002c5
 #define MSR_ACTIVATE_SCAN			0x000002c6
 #define MSR_SCAN_STATUS				0x000002c7
+#define MSR_ARRAY_TRIGGER			0x000002d6
+#define MSR_ARRAY_STATUS			0x000002d7
 #define MSR_SAF_CTRL				0x000004f0
 
 #define SCAN_NOT_TESTED				0
@@ -272,6 +274,7 @@  struct ifs_test_caps {
  * @cur_batch: number indicating the currently loaded test file
  * @generation: IFS test generation enumerated by hardware
  * @chunk_size: size of a test chunk
+ * @array_gen: test generation of array test
  */
 struct ifs_data {
 	int	loaded_version;
@@ -283,6 +286,7 @@  struct ifs_data {
 	u32	cur_batch;
 	u32	generation;
 	u32	chunk_size;
+	u32	array_gen;
 };
 
 struct ifs_work {
diff --git a/drivers/platform/x86/intel/ifs/core.c b/drivers/platform/x86/intel/ifs/core.c
index 0c8927916373..934eaf348f9d 100644
--- a/drivers/platform/x86/intel/ifs/core.c
+++ b/drivers/platform/x86/intel/ifs/core.c
@@ -11,16 +11,16 @@ 
 
 #include "ifs.h"
 
-#define X86_MATCH(model)				\
+#define X86_MATCH(model, array_gen)				\
 	X86_MATCH_VENDOR_FAM_MODEL_FEATURE(INTEL, 6,	\
-		INTEL_FAM6_##model, X86_FEATURE_CORE_CAPABILITIES, NULL)
+		INTEL_FAM6_##model, X86_FEATURE_CORE_CAPABILITIES, array_gen)
 
 static const struct x86_cpu_id ifs_cpu_ids[] __initconst = {
-	X86_MATCH(SAPPHIRERAPIDS_X),
-	X86_MATCH(EMERALDRAPIDS_X),
-	X86_MATCH(GRANITERAPIDS_X),
-	X86_MATCH(GRANITERAPIDS_D),
-	X86_MATCH(ATOM_CRESTMONT_X),
+	X86_MATCH(SAPPHIRERAPIDS_X, 0),
+	X86_MATCH(EMERALDRAPIDS_X, 0),
+	X86_MATCH(GRANITERAPIDS_X, 0),
+	X86_MATCH(GRANITERAPIDS_D, 0),
+	X86_MATCH(ATOM_CRESTMONT_X, 1),
 	{}
 };
 MODULE_DEVICE_TABLE(x86cpu, ifs_cpu_ids);
@@ -100,6 +100,7 @@  static int __init ifs_init(void)
 			continue;
 		ifs_devices[i].rw_data.generation = FIELD_GET(MSR_INTEGRITY_CAPS_SAF_GEN_MASK,
 							      msrval);
+		ifs_devices[i].rw_data.array_gen = (u32)m->driver_data;
 		ret = misc_register(&ifs_devices[i].misc);
 		if (ret)
 			goto err_exit;
diff --git a/drivers/platform/x86/intel/ifs/runtest.c b/drivers/platform/x86/intel/ifs/runtest.c
index 4fe544d79946..a54cd97920c4 100644
--- a/drivers/platform/x86/intel/ifs/runtest.c
+++ b/drivers/platform/x86/intel/ifs/runtest.c
@@ -329,6 +329,38 @@  static void ifs_array_test_core(int cpu, struct device *dev)
 		ifsd->status = SCAN_TEST_PASS;
 }
 
+#define ARRAY_GEN1_TEST_ALL_ARRAYS	0x0ULL
+#define ARRAY_GEN1_STATUS_FAIL		0x1ULL
+
+static int do_array_test_gen1(void *status)
+{
+	int cpu = smp_processor_id();
+	int first;
+
+	first = cpumask_first(cpu_smt_mask(cpu));
+
+	if (cpu == first) {
+		wrmsrl(MSR_ARRAY_TRIGGER, ARRAY_GEN1_TEST_ALL_ARRAYS);
+		rdmsrl(MSR_ARRAY_STATUS, *((u64 *)status));
+	}
+
+	return 0;
+}
+
+static void ifs_array_test_gen1(int cpu, struct device *dev)
+{
+	struct ifs_data *ifsd = ifs_get_data(dev);
+	u64 status = 0;
+
+	stop_core_cpuslocked(cpu, do_array_test_gen1, &status);
+	ifsd->scan_details = status;
+
+	if (status & ARRAY_GEN1_STATUS_FAIL)
+		ifsd->status = SCAN_TEST_FAIL;
+	else
+		ifsd->status = SCAN_TEST_PASS;
+}
+
 /*
  * Initiate per core test. It wakes up work queue threads on the target cpu and
  * its sibling cpu. Once all sibling threads wake up, the scan test gets executed and
@@ -356,7 +388,10 @@  int do_core_test(int cpu, struct device *dev)
 		ifs_test_core(cpu, dev);
 		break;
 	case IFS_TYPE_ARRAY_BIST:
-		ifs_array_test_core(cpu, dev);
+		if (ifsd->array_gen == 0)
+			ifs_array_test_core(cpu, dev);
+		else
+			ifs_array_test_gen1(cpu, dev);
 		break;
 	default:
 		return -EINVAL;