arch/x86/include/uapi/asm/amd_hsmp.h

Source file repositories/reference/linux-study-clean/arch/x86/include/uapi/asm/amd_hsmp.h

File Facts

System
Linux kernel
Corpus path
arch/x86/include/uapi/asm/amd_hsmp.h
Extension
.h
Size
13312 bytes
Lines
478
Domain
Architecture Layer
Bucket
arch/x86
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct hsmp_message {
	__u32	msg_id;			/* Message ID */
	__u16	num_args;		/* Number of input argument words in message */
	__u16	response_sz;		/* Number of expected output/response words */
	__u32	args[HSMP_MAX_MSG_LEN];	/* argument/response buffer */
	__u16	sock_ind;		/* socket number */
};

enum hsmp_msg_type {
	HSMP_RSVD = -1,
	HSMP_SET  = 0,
	HSMP_GET  = 1,
	HSMP_SET_GET	= 2,
};

enum hsmp_proto_versions {
	HSMP_PROTO_VER2	= 2,
	HSMP_PROTO_VER3,
	HSMP_PROTO_VER4,
	HSMP_PROTO_VER5,
	HSMP_PROTO_VER6,
	HSMP_PROTO_VER7
};

struct hsmp_msg_desc {
	int num_args;
	int response_sz;
	enum hsmp_msg_type type;
};

/*
 * User may use these comments as reference, please find the
 * supported list of messages and message definition in the
 * HSMP chapter of respective family/model PPR.
 *
 * Not supported messages would return -ENOMSG.
 */
static const struct hsmp_msg_desc hsmp_msg_desc_table[]
				__attribute__((unused)) = {
	/* RESERVED */
	{0, 0, HSMP_RSVD},

	/*
	 * HSMP_TEST, num_args = 1, response_sz = 1
	 * input:  args[0] = xx
	 * output: args[0] = xx + 1
	 */
	{1, 1, HSMP_GET},

	/*
	 * HSMP_GET_SMU_VER, num_args = 0, response_sz = 1
	 * output: args[0] = smu fw ver
	 */
	{0, 1, HSMP_GET},

	/*
	 * HSMP_GET_PROTO_VER, num_args = 0, response_sz = 1
	 * output: args[0] = proto version
	 */
	{0, 1, HSMP_GET},

	/*
	 * HSMP_GET_SOCKET_POWER, num_args = 0, response_sz = 1
	 * output: args[0] = socket power in mWatts
	 */
	{0, 1, HSMP_GET},

	/*
	 * HSMP_SET_SOCKET_POWER_LIMIT, num_args = 1, response_sz = 0
	 * input: args[0] = power limit value in mWatts
	 */
	{1, 0, HSMP_SET},

	/*
	 * HSMP_GET_SOCKET_POWER_LIMIT, num_args = 0, response_sz = 1
	 * output: args[0] = socket power limit value in mWatts
	 */
	{0, 1, HSMP_GET},

	/*
	 * HSMP_GET_SOCKET_POWER_LIMIT_MAX, num_args = 0, response_sz = 1
	 * output: args[0] = maximuam socket power limit in mWatts
	 */
	{0, 1, HSMP_GET},

	/*
	 * HSMP_SET_BOOST_LIMIT, num_args = 1, response_sz = 0
	 * input: args[0] = apic id[31:16] + boost limit value in MHz[15:0]
	 */
	{1, 0, HSMP_SET},

Annotation

Implementation Notes