linux-kernel - Re: [PATCH V2 6/9] tools/arch/x86/intel

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Message-ID: <9661c185-0132-44da-beef-05da55c5a98f@linux.intel.com>
Date: Tue, 27 Feb 2024 18:57:19 -0800
From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
To: "David E. Box" <david.e.box@...ux.intel.com>,
 rajvi.jingar@...ux.intel.com, platform-driver-x86@...r.kernel.org,
 linux-kernel@...r.kernel.org, hdegoede@...hat.com,
 ilpo.jarvinen@...ux.intel.com
Subject: Re: [PATCH V2 6/9] tools/arch/x86/intel_sdsi: Add missing version
 field


On 2/27/24 4:00 PM, David E. Box wrote:
> Add missing 'version' field to struct meter_certificate. Also fix output
> string alignment.
>
> Fixes: aad129780bae ("platform/x86/intel/sdsi: Add support for reading the current meter state")
> Signed-off-by: David E. Box <david.e.box@...ux.intel.com>
> ---
>
> 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 a02850a710ee..def1b9a01738 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;
>  };
> @@ -336,6 +337,7 @@ static int sdsi_meter_cert_show(struct sdsi_dev *s)
>  	uint32_t count = 0;
>  	FILE *cert_ptr;
>  	int ret, size;
> +	char name[4];

Nit: IMO, instead of hardcoding, you can introduce a macro like FEATURE_LEN.
It is up to you.

>  
>  	ret = sdsi_update_registers(s);
>  	if (ret)
> @@ -377,12 +379,19 @@ 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;
> @@ -396,7 +405,7 @@ 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:   %d\n", mc->bundle_length / 8);

Try to use sizeof instead of hardcoded value.

>  	while (count++ < mc->bundle_length / 8) {
>  		char feature[5];
>  

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer