linux-kernel - Re: [PATCH V3 6/9] tools/arch/x86/intel_sdsi: Fix meter

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Date: Mon, 8 Apr 2024 20:13:50 +0300 (EEST)
From: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>
To: "David E. Box" <david.e.box@...ux.intel.com>
cc: Hans de Goede <hdegoede@...hat.com>, platform-driver-x86@...r.kernel.org, 
    LKML <linux-kernel@...r.kernel.org>, 
    sathyanarayanan.kuppuswamy@...ux.intel.com
Subject: Re: [PATCH V3 6/9] tools/arch/x86/intel_sdsi: Fix meter_show
 display

On Thu, 4 Apr 2024, David E. Box wrote:

> Fixes sdsi_meter_cert_show() to correctly decode and display the meter
> certificate output. Adds and displays a missing version field, displays the
> ASCII name of the signature, and fixes the print alignment.
> 
> Fixes: 7fdc03a7370f ("tools/arch/x86: intel_sdsi: Add support for reading meter certificates")
> Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> ---
> V3 - Change patch subject and changelog to clarify changes.
>    - Use new BUNDLE_COUNT #def
> 
> V2 - Split of V1 patch 7
> 
>  tools/arch/x86/intel_sdsi/intel_sdsi.c | 29 +++++++++++++++++---------
>  1 file changed, 19 insertions(+), 10 deletions(-)
> 
> diff --git a/tools/arch/x86/intel_sdsi/intel_sdsi.c b/tools/arch/x86/intel_sdsi/intel_sdsi.c
> index 7eaffcbff788..a0711177e1bb 100644
> --- a/tools/arch/x86/intel_sdsi/intel_sdsi.c
> +++ b/tools/arch/x86/intel_sdsi/intel_sdsi.c
> @@ -153,11 +153,12 @@ struct bundle_encoding {
>  };
>  
>  struct meter_certificate {
> -	uint32_t block_signature;
> +	uint32_t signature;
> +	uint32_t version;
> +	uint64_t ppin;
>  	uint32_t counter_unit;
> -	uint64_t ppin;
>  	uint32_t bundle_length;
> -	uint32_t reserved;
> +	uint64_t reserved;
>  	uint32_t mmrc_encoding;
>  	uint32_t mmrc_counter;
>  };
> @@ -338,6 +339,7 @@ static int sdsi_meter_cert_show(struct sdsi_dev *s)
>  	uint32_t count = 0;
>  	FILE *cert_ptr;
>  	int ret, size;
> +	char name[4];
>  
>  	ret = sdsi_update_registers(s);
>  	if (ret)
> @@ -379,12 +381,19 @@ static int sdsi_meter_cert_show(struct sdsi_dev *s)
>  	printf("\n");
>  	printf("Meter certificate for device %s\n", s->dev_name);
>  	printf("\n");
> -	printf("Block Signature:       0x%x\n", mc->block_signature);
> -	printf("Count Unit:            %dms\n", mc->counter_unit);
> -	printf("PPIN:                  0x%lx\n", mc->ppin);
> -	printf("Feature Bundle Length: %d\n", mc->bundle_length);
> -	printf("MMRC encoding:         %d\n", mc->mmrc_encoding);
> -	printf("MMRC counter:          %d\n", mc->mmrc_counter);
> +
> +	get_feature(mc->signature, name);
> +	printf("Signature:                    %.4s\n", name);
> +
> +	printf("Version:                      %d\n", mc->version);
> +	printf("Count Unit:                   %dms\n", mc->counter_unit);
> +	printf("PPIN:                         0x%lx\n", mc->ppin);
> +	printf("Feature Bundle Length:        %d\n", mc->bundle_length);
> +
> +	get_feature(mc->mmrc_encoding, name);
> +	printf("MMRC encoding:                %.4s\n", name);
> +
> +	printf("MMRC counter:                 %d\n", mc->mmrc_counter);
>  	if (mc->bundle_length % 8) {
>  		fprintf(stderr, "Invalid bundle length\n");
>  		return -1;
> @@ -398,7 +407,7 @@ static int sdsi_meter_cert_show(struct sdsi_dev *s)
>  
>  	bec = (void *)(mc) + sizeof(mc);
>  
> -	printf("Number of Feature Counters:          %d\n", mc->bundle_length / 8);
> +	printf("Number of Feature Counters:   %ld\n", BUNDLE_COUNT(mc->bundle_length));
>  	while (count++ < mc->bundle_length / 8) {
>  		char feature[5];

Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>

-- 
 i.