Commit 7fdc03a7 authored by David E. Box's avatar David E. Box Committed by Hans de Goede
Browse files

tools/arch/x86: intel_sdsi: Add support for reading meter certificates 

Add option to read and decode On Demand meter certificates.

Link: https://github.com/intel/intel-sdsi/blob/master/meter-certificate.rst



Signed-off-by: default avatarDavid E. Box <david.e.box@linux.intel.com>
Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Link: https://lore.kernel.org/r/20221119002343.1281885-10-david.e.box@linux.intel.com


Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent 429e789c

tools/arch/x86/intel_sdsi/intel_sdsi.c

+108 −2
Original line number Diff line number Diff line
@@ -40,8 +40,10 @@ 
#define GUID_V2			0xF210D9EF

#define REGS_SIZE_GUID_V2	80

#define STATE_CERT_MAX_SIZE	4096

#define METER_CERT_MAX_SIZE	4096

#define STATE_MAX_NUM_LICENSES	16

#define STATE_MAX_NUM_IN_BUNDLE	(uint32_t)8

#define METER_MAX_NUM_BUNDLES	8



#define __round_mask(x, y) ((__typeof__(x))((y) - 1))

#define round_up(x, y) ((((x) - 1) | __round_mask(x, y)) + 1)
@@ -151,6 +153,21 @@ struct bundle_encoding { 
	uint32_t encoding_rsvd[7];

};



struct meter_certificate {

	uint32_t block_signature;

	uint32_t counter_unit;

	uint64_t ppin;

	uint32_t bundle_length;

	uint32_t reserved;

	uint32_t mmrc_encoding;

	uint32_t mmrc_counter;

};



struct bundle_encoding_counter {

	uint32_t encoding;

	uint32_t counter;

};



struct sdsi_dev {

	struct sdsi_regs regs;

	struct state_certificate sc;
@@ -161,6 +178,7 @@ struct sdsi_dev { 


enum command {

	CMD_SOCKET_INFO,

	CMD_METER_CERT,

	CMD_STATE_CERT,

	CMD_PROV_AKC,

	CMD_PROV_CAP,
@@ -308,6 +326,86 @@ static void get_feature(uint32_t encoding, char *feature) 
	feature[0] = name[3];

}



static int sdsi_meter_cert_show(struct sdsi_dev *s)

{

	char buf[METER_CERT_MAX_SIZE] = {0};

	struct bundle_encoding_counter *bec;

	struct meter_certificate *mc;

	uint32_t count = 0;

	FILE *cert_ptr;

	int ret, size;



	ret = sdsi_update_registers(s);

	if (ret)

		return ret;



	if (!s->regs.en_features.sdsi) {

		fprintf(stderr, "SDSi feature is present but not enabled.\n");

		fprintf(stderr, " Unable to read meter certificate\n");

		return -1;

	}



	if (!s->regs.en_features.metering) {

		fprintf(stderr, "Metering not supporting on this socket.\n");

		return -1;

	}



	ret = chdir(s->dev_path);

	if (ret == -1) {

		perror("chdir");

		return ret;

	}



	cert_ptr = fopen("meter_certificate", "r");

	if (!cert_ptr) {

		perror("Could not open 'meter_certificate' file");

		return -1;

	}



	size = fread(buf, 1, sizeof(buf), cert_ptr);

	if (!size) {

		fprintf(stderr, "Could not read 'meter_certificate' file\n");

		fclose(cert_ptr);

		return -1;

	}

	fclose(cert_ptr);



	mc = (struct meter_certificate *)buf;



	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);

	if (mc->bundle_length % 8) {

		fprintf(stderr, "Invalid bundle length\n");

		return -1;

	}



	if (mc->bundle_length > METER_MAX_NUM_BUNDLES * 8)  {

		fprintf(stderr, "More than %d bundles: %d\n",

			METER_MAX_NUM_BUNDLES, mc->bundle_length / 8);

		return -1;

	}



	bec = (void *)(mc) + sizeof(mc);



	printf("Number of Feature Counters:          %d\n", mc->bundle_length / 8);

	while (count++ < mc->bundle_length / 8) {

		char feature[5];



		feature[4] = '\0';

		get_feature(bec[count].encoding, feature);

		printf("    %s:          %d\n", feature, bec[count].counter);

	}



	return 0;

}



static int sdsi_state_cert_show(struct sdsi_dev *s)

{

	char buf[STATE_CERT_MAX_SIZE] = {0};
@@ -627,7 +725,7 @@ static void sdsi_free_dev(struct sdsi_dev *s) 


static void usage(char *prog)

{

	printf("Usage: %s [-l] [-d DEVNO [-i] [-s] [-a FILE] [-c FILE]]\n", prog);

	printf("Usage: %s [-l] [-d DEVNO [-i] [-s] [-m] [-a FILE] [-c FILE]]\n", prog);

}



static void show_help(void)
@@ -637,6 +735,7 @@ static void show_help(void) 
	printf("  %-18s\t%s\n", "-d, --devno DEVNO",    "On Demand device number");

	printf("  %-18s\t%s\n", "-i, --info",           "show socket information");

	printf("  %-18s\t%s\n", "-s, --state",          "show state certificate");

	printf("  %-18s\t%s\n", "-m, --meter",          "show meter certificate");

	printf("  %-18s\t%s\n", "-a, --akc FILE",       "provision socket with AKC FILE");

	printf("  %-18s\t%s\n", "-c, --cap FILE>",      "provision socket with CAP FILE");

}
@@ -658,6 +757,7 @@ int main(int argc, char *argv[]) 
		{"help",	no_argument,		0, 'h'},

		{"info",	no_argument,		0, 'i'},

		{"list",	no_argument,		0, 'l'},

		{"meter",	no_argument,		0, 'm'},

		{"state",	no_argument,		0, 's'},

		{0,		0,			0, 0 }

	};
@@ -665,7 +765,7 @@ int main(int argc, char *argv[]) 


	progname = argv[0];



	while ((opt = getopt_long_only(argc, argv, "+a:c:d:hils", long_options,

	while ((opt = getopt_long_only(argc, argv, "+a:c:d:hilms", long_options,

			&option_index)) != -1) {

		switch (opt) {

		case 'd':
@@ -678,6 +778,9 @@ int main(int argc, char *argv[]) 
		case 'i':

			command = CMD_SOCKET_INFO;

			break;

		case 'm':

			command = CMD_METER_CERT;

			break;

		case 's':

			command = CMD_STATE_CERT;

			break;
@@ -715,6 +818,9 @@ int main(int argc, char *argv[]) 
		case CMD_SOCKET_INFO:

			ret = sdsi_read_reg(s);

			break;

		case CMD_METER_CERT:

			ret = sdsi_meter_cert_show(s);

			break;

		case CMD_STATE_CERT:

			ret = sdsi_state_cert_show(s);

			break;