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authorDavid E. Box <david.e.box@linux.intel.com>2022-11-19 03:23:43 +0300
committerHans de Goede <hdegoede@redhat.com>2022-11-21 12:56:17 +0300
commit7fdc03a7370fb64d12d5e93359464f9f72af5adc (patch)
tree7de0ce769a67249ecadcbea5147e6989c44c3653 /tools/arch
parent429e789c67b8b5dc84ab5d5c83725f6e295a0adc (diff)
downloadlinux-7fdc03a7370fb64d12d5e93359464f9f72af5adc.tar.xz
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: David E. Box <david.e.box@linux.intel.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20221119002343.1281885-10-david.e.box@linux.intel.com Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Diffstat (limited to 'tools/arch')
-rw-r--r--tools/arch/x86/intel_sdsi/intel_sdsi.c110
1 files changed, 108 insertions, 2 deletions
diff --git a/tools/arch/x86/intel_sdsi/intel_sdsi.c b/tools/arch/x86/intel_sdsi/intel_sdsi.c
index b42e1b6a6a1b..2cd92761f171 100644
--- a/tools/arch/x86/intel_sdsi/intel_sdsi.c
+++ b/tools/arch/x86/intel_sdsi/intel_sdsi.c
@@ -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;