Commit 429e789c 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 new GUID 



The structure and content of the On Demand registers is based on the GUID
which is read from hardware through sysfs. Add support for decoding the
registers of a new GUID 0xF210D9EF.

Signed-off-by: default avatarDavid E. Box <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20221119002343.1281885-9-david.e.box@linux.intel.com


Reviewed-by: default avatarHans de Goede <hdegoede@redhat.com>
Signed-off-by: default avatarHans de Goede <hdegoede@redhat.com>
parent a8041a89

tools/arch/x86/intel_sdsi/intel_sdsi.c

+25 −11
Original line number Diff line number Diff line
@@ -35,8 +35,10 @@ 
#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 GUID_V1			0x6dd191

#define REGS_SIZE_GUID_V1	72

#define GUID_V2			0xF210D9EF

#define REGS_SIZE_GUID_V2	80

#define STATE_CERT_MAX_SIZE	4096

#define STATE_MAX_NUM_LICENSES	16

#define STATE_MAX_NUM_IN_BUNDLE	(uint32_t)8
@@ -100,9 +102,17 @@ struct sdsi_regs { 
	struct availability prov_avail;

	struct nvram_update_limit limits;

	uint64_t pcu_cr3_capid_cfg;

	union {

		struct {

			uint64_t socket_id;

		} v1;

		struct {

			uint64_t reserved;

			uint64_t socket_id;

			uint64_t reserved2;

		} v2;

	} extra;

};



#define CONTENT_TYPE_LK_ENC		0xD

#define CONTENT_TYPE_LK_BLOB_ENC	0xE
@@ -146,7 +156,7 @@ struct sdsi_dev { 
	struct state_certificate sc;

	char *dev_name;

	char *dev_path;

	int guid;

	uint32_t guid;

};



enum command {
@@ -199,7 +209,7 @@ static int sdsi_update_registers(struct sdsi_dev *s) 
		return -1;

	}



	if (s->guid != GUID) {

	if (s->guid != GUID_V1 && s->guid != GUID_V2) {

		fprintf(stderr, "Unrecognized guid, 0x%x\n", s->guid);

		fclose(regs_ptr);

		return -1;
@@ -207,7 +217,8 @@ static int sdsi_update_registers(struct sdsi_dev *s) 


	/* Update register info for this guid */

	ret = fread(&s->regs, sizeof(uint8_t), sizeof(s->regs), regs_ptr);

	if (ret != sizeof(s->regs)) {

	if ((s->guid == GUID_V1 && ret != REGS_SIZE_GUID_V1) ||

	    (s->guid == GUID_V2 && ret != REGS_SIZE_GUID_V2)) {

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

		fclose(regs_ptr);

		return -1;
@@ -255,7 +266,10 @@ static int sdsi_read_reg(struct sdsi_dev *s) 
	printf("    50%% Limit Reached:          %s\n", !!s->regs.limits.sdsi_50_pct ? "Yes" : "No");

	printf("    75%% Limit Reached:          %s\n", !!s->regs.limits.sdsi_75_pct ? "Yes" : "No");

	printf("    90%% Limit Reached:          %s\n", !!s->regs.limits.sdsi_90_pct ? "Yes" : "No");

	printf("Socket ID:                      %ld\n", s->regs.socket_id & 0xF);

	if (s->guid == GUID_V1)

		printf("Socket ID:                      %ld\n", s->regs.extra.v1.socket_id & 0xF);

	else

		printf("Socket ID:                      %ld\n", s->regs.extra.v2.socket_id & 0xF);



	return 0;

}