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From:   "David E. Box" <david.e.box@linux.intel.com>
To:     hdegoede@redhat.com, markgross@kernel.org,
        andriy.shevchenko@linux.intel.com, srinivas.pandruvada@intel.com
Cc:     "David E. Box" <david.e.box@linux.intel.com>,
        platform-driver-x86@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH 5/9] tools/arch/x86: intel_sdsi: Add support for reading state certificates
Date:   Tue,  1 Nov 2022 12:10:19 -0700
Message-Id: <20221101191023.4150315-6-david.e.box@linux.intel.com>
In-Reply-To: <20221101191023.4150315-1-david.e.box@linux.intel.com>
References: <20221101191023.4150315-1-david.e.box@linux.intel.com>
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Add option to read and decode On Demand state certificates.

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

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
---
 tools/arch/x86/intel_sdsi/intel_sdsi.c | 268 ++++++++++++++++++-------
 1 file changed, 198 insertions(+), 70 deletions(-)

diff --git a/tools/arch/x86/intel_sdsi/intel_sdsi.c b/tools/arch/x86/intel_sdsi/intel_sdsi.c
index c0e2f2349db4..9dd94014a672 100644
--- a/tools/arch/x86/intel_sdsi/intel_sdsi.c
+++ b/tools/arch/x86/intel_sdsi/intel_sdsi.c
@@ -22,11 +22,24 @@
 
 #include <sys/types.h>
 
+#ifndef __packed
+#define __packed __attribute__((packed))
+#endif
+
+#define min(x, y) ({                            \
+	typeof(x) _min1 = (x);                  \
+	typeof(y) _min2 = (y);                  \
+	(void) (&_min1 == &_min2);              \
+	_min1 < _min2 ? _min1 : _min2; })
+
 #define SDSI_DEV		"intel_vsec.sdsi"
 #define AUX_DEV_PATH		"/sys/bus/auxiliary/devices/"
 #define SDSI_PATH		(AUX_DEV_DIR SDSI_DEV)
 #define GUID			0x6dd191
 #define REGISTERS_MIN_SIZE	72
+#define STATE_CERT_MAX_SIZE	4096
+#define STATE_MAX_NUM_LICENSES	16
+#define STATE_MAX_NUM_IN_BUNDLE	(uint32_t)8
 
 #define __round_mask(x, y) ((__typeof__(x))((y) - 1))
 #define round_up(x, y) ((((x) - 1) | __round_mask(x, y)) + 1)
@@ -49,6 +62,7 @@ struct availability {
 	uint64_t reserved:48;
 	uint64_t available:3;
 	uint64_t threshold:3;
+	uint64_t reserved2:10;
 };
 
 struct sdsi_regs {
@@ -63,17 +77,55 @@ struct sdsi_regs {
 	uint64_t socket_id;
 };
 
+#define CONTENT_TYPE_LK_ENC		0xD
+#define CONTENT_TYPE_LK_BLOB_ENC	0xE
+
+struct state_certificate {
+	uint32_t content_type;
+	uint32_t region_rev_id;
+	uint32_t header_size;
+	uint32_t total_size;
+	uint32_t key_size;
+	uint32_t num_licenses;
+};
+
+struct license_key_info {
+	uint32_t key_rev_id;
+	uint64_t key_image_content[6];
+} __packed;
+
+#define LICENSE_BLOB_SIZE(l)	(((l) & 0x7fffffff) * 4)
+#define LICENSE_VALID(l)	(!!((l) & 0x80000000))
+
+// License Group Types
+#define LBT_ONE_TIME_UPGRADE	1
+#define LBT_METERED_UPGRADE	2
+
+struct license_blob_content {
+	uint32_t type;
+	uint64_t id;
+	uint64_t ppin;
+	uint64_t previous_ppin;
+	uint32_t rev_id;
+	uint32_t num_bundles;
+} __packed;
+
+struct bundle_encoding {
+	uint32_t encoding;
+	uint32_t encoding_rsvd[7];
+};
+
 struct sdsi_dev {
 	struct sdsi_regs regs;
+	struct state_certificate sc;
 	char *dev_name;
 	char *dev_path;
 	int guid;
 };
 
 enum command {
-	CMD_NONE,
 	CMD_SOCKET_INFO,
-	CMD_DUMP_CERT,
+	CMD_STATE_CERT,
 	CMD_PROV_AKC,
 	CMD_PROV_CAP,
 };
@@ -168,20 +220,56 @@ static int sdsi_read_reg(struct sdsi_dev *s)
 	return 0;
 }
 
-static int sdsi_certificate_dump(struct sdsi_dev *s)
+static char *license_blob_type(uint32_t type)
+{
+	switch (type) {
+	case LBT_ONE_TIME_UPGRADE:
+		return "One time upgrade";
+	case LBT_METERED_UPGRADE:
+		return "Metered upgrade";
+	default:
+		return "Unknown license blob type";
+	}
+}
+
+static char *content_type(uint32_t type)
+{
+	switch (type) {
+	case  CONTENT_TYPE_LK_ENC:
+		return "Licencse key encoding";
+	case CONTENT_TYPE_LK_BLOB_ENC:
+		return "License key + Blob encoding";
+	default:
+		return "Unknown content type";
+	}
+}
+
+static void get_feature(uint32_t encoding, char *feature)
+{
+	char *name = (char *)&encoding;
+
+	feature[3] = name[0];
+	feature[2] = name[1];
+	feature[1] = name[2];
+	feature[0] = name[3];
+}
+
+static int sdsi_state_cert_show(struct sdsi_dev *s)
 {
-	uint64_t state_certificate[512] = {0};
-	bool first_instance;
-	uint64_t previous;
+	char buf[STATE_CERT_MAX_SIZE] = {0};
+	struct state_certificate *sc;
+	struct license_key_info *lki;
+	uint32_t offset = 0;
+	uint32_t count = 0;
 	FILE *cert_ptr;
-	int i, ret, size;
+	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.");
+		fprintf(stderr, "On Demand feature is present but not enabled.");
 		fprintf(stderr, " Unable to read state certificate");
 		return -1;
 	}
@@ -198,32 +286,74 @@ static int sdsi_certificate_dump(struct sdsi_dev *s)
 		return -1;
 	}
 
-	size = fread(state_certificate, 1, sizeof(state_certificate), cert_ptr);
+	size = fread(buf, 1, sizeof(buf), cert_ptr);
 	if (!size) {
 		fprintf(stderr, "Could not read 'state_certificate' file\n");
 		fclose(cert_ptr);
 		return -1;
 	}
+	fclose(cert_ptr);
 
-	printf("%3d: 0x%lx\n", 0, state_certificate[0]);
-	previous = state_certificate[0];
-	first_instance = true;
+	sc = (struct state_certificate *)buf;
 
-	for (i = 1; i < (int)(round_up(size, sizeof(uint64_t))/sizeof(uint64_t)); i++) {
-		if (state_certificate[i] == previous) {
-			if (first_instance) {
-				puts("*");
-				first_instance = false;
-			}
-			continue;
+	/* Print register info for this guid */
+	printf("\n");
+	printf("State certificate for device %s\n", s->dev_name);
+	printf("\n");
+	printf("Content Type:          %s\n", content_type(sc->content_type));
+	printf("Region Revision ID:    %d\n", sc->region_rev_id);
+	printf("Header Size:           %d\n", sc->header_size * 4);
+	printf("Total Size:            %d\n", sc->total_size);
+	printf("OEM Key Size:          %d\n", sc->key_size * 4);
+	printf("Number of Licenses:    %d\n", sc->num_licenses);
+
+	/* Skip over the license sizes 4 bytes per license) to get the license key info */
+	lki = (void *)sc + sizeof(*sc) + (4 * sc->num_licenses);
+
+	printf("License blob Info:\n");
+	printf("    License Key Revision ID:    0x%x\n", lki->key_rev_id);
+	printf("    License Key Image Content:  0x%lx%lx%lx%lx%lx%lx\n",
+	       lki->key_image_content[5], lki->key_image_content[4],
+	       lki->key_image_content[3], lki->key_image_content[2],
+	       lki->key_image_content[1], lki->key_image_content[0]);
+
+	while (count++ < sc->num_licenses) {
+		uint32_t blob_size_field = *(uint32_t *)(buf + 0x14 + count * 4);
+		uint32_t blob_size = LICENSE_BLOB_SIZE(blob_size_field);
+		bool license_valid = LICENSE_VALID(blob_size_field);
+		struct license_blob_content *lbc =
+			(void *)(sc) +			// start of the state certificate
+			sizeof(*sc) +			// size of the state certificate
+			(4 * sc->num_licenses) +	// total size of the blob size blocks
+			sizeof(*lki) +			// size of the license key info
+			offset;				// offset to this blob content
+		struct bundle_encoding *bundle = (void *)(lbc) + sizeof(*lbc);
+		char feature[5];
+		uint32_t i;
+
+		printf("     Blob %d:\n", count - 1);
+		printf("        License blob size:          %u\n", blob_size);
+		printf("        License is valid:           %s\n", license_valid ? "Yes" : "No");
+		printf("        License blob type:          %s\n", license_blob_type(lbc->type));
+		printf("        License blob ID:            0x%lx\n", lbc->id);
+		printf("        PPIN:                       0x%lx\n", lbc->ppin);
+		printf("        Previous PPIN:              0x%lx\n", lbc->previous_ppin);
+		printf("        Blob revision ID:           %u\n", lbc->rev_id);
+		printf("        Number of Features:         %u\n", lbc->num_bundles);
+
+		feature[4] = '\0';
+
+		for (i = 0; i < min(lbc->num_bundles, STATE_MAX_NUM_IN_BUNDLE); i++) {
+			get_feature(bundle[i].encoding, feature);
+			printf("                 Feature %d:         %s\n", i, feature);
 		}
-		printf("%3d: 0x%lx\n", i, state_certificate[i]);
-		previous = state_certificate[i];
-		first_instance = true;
-	}
-	printf("%3d\n", i);
 
-	fclose(cert_ptr);
+		if (lbc->num_bundles > STATE_MAX_NUM_IN_BUNDLE)
+			fprintf(stderr, "        Warning: %d > %d licenses in bundle reported.\n",
+				lbc->num_bundles, STATE_MAX_NUM_IN_BUNDLE);
+
+		offset += blob_size;
+	};
 
 	return 0;
 }
@@ -231,7 +361,7 @@ static int sdsi_certificate_dump(struct sdsi_dev *s)
 static int sdsi_provision(struct sdsi_dev *s, char *bin_file, enum command command)
 {
 	int bin_fd, prov_fd, size, ret;
-	char buf[4096] = { 0 };
+	char buf[STATE_CERT_MAX_SIZE] = { 0 };
 	char cap[] = "provision_cap";
 	char akc[] = "provision_akc";
 	char *prov_file;
@@ -266,7 +396,7 @@ static int sdsi_provision(struct sdsi_dev *s, char *bin_file, enum command comma
 	}
 
 	/* Read the binary file into the buffer */
-	size = read(bin_fd, buf, 4096);
+	size = read(bin_fd, buf, STATE_CERT_MAX_SIZE);
 	if (size == -1) {
 		close(bin_fd);
 		close(prov_fd);
@@ -443,25 +573,26 @@ static void sdsi_free_dev(struct sdsi_dev *s)
 
 static void usage(char *prog)
 {
-	printf("Usage: %s [-l] [-d DEVNO [-iD] [-a FILE] [-c FILE]]\n", prog);
+	printf("Usage: %s [-l] [-d DEVNO [-i] [-s] [-a FILE] [-c FILE]]\n", prog);
 }
 
 static void show_help(void)
 {
 	printf("Commands:\n");
-	printf("  %-18s\t%s\n", "-l, --list",		"list available sdsi devices");
-	printf("  %-18s\t%s\n", "-d, --devno DEVNO",	"sdsi device number");
-	printf("  %-18s\t%s\n", "-i --info",		"show socket information");
-	printf("  %-18s\t%s\n", "-D --dump",		"dump state certificate data");
-	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");
+	printf("  %-18s\t%s\n", "-l, --list",           "list available On Demand devices");
+	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", "-a, --akc FILE",       "provision socket with AKC FILE");
+	printf("  %-18s\t%s\n", "-c, --cap FILE>",      "provision socket with CAP FILE");
 }
 
 int main(int argc, char *argv[])
 {
 	char bin_file[PATH_MAX], *dev_no = NULL;
+	bool device_selected = false;
 	char *progname;
-	enum command command = CMD_NONE;
+	enum command command = -1;
 	struct sdsi_dev *s;
 	int ret = 0, opt;
 	int option_index = 0;
@@ -470,21 +601,22 @@ int main(int argc, char *argv[])
 		{"akc",		required_argument,	0, 'a'},
 		{"cap",		required_argument,	0, 'c'},
 		{"devno",	required_argument,	0, 'd'},
-		{"dump",	no_argument,		0, 'D'},
 		{"help",	no_argument,		0, 'h'},
 		{"info",	no_argument,		0, 'i'},
 		{"list",	no_argument,		0, 'l'},
+		{"state",	no_argument,		0, 's'},
 		{0,		0,			0, 0 }
 	};
 
 
 	progname = argv[0];
 
-	while ((opt = getopt_long_only(argc, argv, "+a:c:d:Da:c:h", long_options,
+	while ((opt = getopt_long_only(argc, argv, "+a:c:d:hils", long_options,
 			&option_index)) != -1) {
 		switch (opt) {
 		case 'd':
 			dev_no = optarg;
+			device_selected = true;
 			break;
 		case 'l':
 			sdsi_list_devices();
@@ -492,8 +624,8 @@ int main(int argc, char *argv[])
 		case 'i':
 			command = CMD_SOCKET_INFO;
 			break;
-		case 'D':
-			command = CMD_DUMP_CERT;
+		case 's':
+			command = CMD_STATE_CERT;
 			break;
 		case 'a':
 		case 'c':
@@ -520,39 +652,35 @@ int main(int argc, char *argv[])
 		}
 	}
 
-	if (!dev_no) {
-		if (command != CMD_NONE)
-			fprintf(stderr, "Missing device number, DEVNO, for this command\n");
-		usage(progname);
-		return -1;
-	}
+	if (device_selected) {
+		s = sdsi_create_dev(dev_no);
+		if (!s)
+			return -1;
 
-	s = sdsi_create_dev(dev_no);
-	if (!s)
-		return -1;
+		switch (command) {
+		case CMD_SOCKET_INFO:
+			ret = sdsi_read_reg(s);
+			break;
+		case CMD_STATE_CERT:
+			ret = sdsi_state_cert_show(s);
+			break;
+		case CMD_PROV_AKC:
+			ret = sdsi_provision_akc(s, bin_file);
+			break;
+		case CMD_PROV_CAP:
+			ret = sdsi_provision_cap(s, bin_file);
+			break;
+		default:
+			fprintf(stderr, "No command specified\n");
+			return -1;
+		}
+
+		sdsi_free_dev(s);
 
-	/* Run the command */
-	switch (command) {
-	case CMD_NONE:
-		fprintf(stderr, "Missing command for device %s\n", dev_no);
-		usage(progname);
-		break;
-	case CMD_SOCKET_INFO:
-		ret = sdsi_read_reg(s);
-		break;
-	case CMD_DUMP_CERT:
-		ret = sdsi_certificate_dump(s);
-		break;
-	case CMD_PROV_AKC:
-		ret = sdsi_provision_akc(s, bin_file);
-		break;
-	case CMD_PROV_CAP:
-		ret = sdsi_provision_cap(s, bin_file);
-		break;
-	}
-
-
-	sdsi_free_dev(s);
+	} else {
+		fprintf(stderr, "No device specified\n");
+		return -1;
+	}
 
 	return ret;
 }
-- 
2.25.1