platform/x86: ISST: Add Intel Speed Select PUNIT MSR interface

While using new non arhitectural features using PUNIT Mailbox and MMIO read/write interface, still there is need to operate using MSRs to control PUNIT. User space could have used user user-space MSR interface for this, but when user space MSR access is disabled, then it can't. Here only limited number of MSRs are allowed using this new interface.

Srinivas Pandruvada committed 7 years ago

Commit e765f371 parent 71b21bd2 files · +91 −0Browse files

Showing the changes to include/uapi/linux (1 of 2 files). Show all

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include/uapi/linux/isst_if.h+32−0

@@ -132,9 +132,41 @@ struct isst_if_mbox_cmds { · 131 unmodified lines
132	struct isst_if_mbox_cmd mbox_cmd[1];	132	struct isst_if_mbox_cmd mbox_cmd[1];
133	};	133	};
134		134
		135	/**
		136	* struct isst_if_msr_cmd - Structure to define msr command
		137	* @read_write: Value 0: Read, 1: Write
		138	* @logical_cpu: Logical CPU number
		139	* @msr: MSR number
		140	* @data: For write operation, data to write, for read
		141	* place holder
		142	*
		143	* Structure to specify MSR command related to PUNIT.
		144	*/
		145	struct isst_if_msr_cmd {
		146	__u32 read_write; /* Read:0, Write:1 */
		147	__u32 logical_cpu;
		148	__u64 msr;
		149	__u64 data;
		150	};
		151
		152	/**
		153	* struct isst_if_msr_cmds - structure for msr commands
		154	* @cmd_count: Number of mailbox commands in msr_cmd[]
		155	* @msr_cmd[]: Holds one or more msr commands
		156	*
		157	* This structure used with ioctl ISST_IF_MSR_COMMAND to send
		158	* one or more MSR commands. IOCTL return value indicates number of
		159	* commands sent or error number if no commands have been sent.
		160	*/
		161	struct isst_if_msr_cmds {
		162	__u32 cmd_count;
		163	struct isst_if_msr_cmd msr_cmd[1];
		164	};
		165
135	#define ISST_IF_MAGIC 0xFE	166	#define ISST_IF_MAGIC 0xFE
136	#define ISST_IF_GET_PLATFORM_INFO _IOR(ISST_IF_MAGIC, 0, struct isst_if_platform_info *)	167	#define ISST_IF_GET_PLATFORM_INFO _IOR(ISST_IF_MAGIC, 0, struct isst_if_platform_info *)
137	#define ISST_IF_GET_PHY_ID _IOWR(ISST_IF_MAGIC, 1, struct isst_if_cpu_map *)	168	#define ISST_IF_GET_PHY_ID _IOWR(ISST_IF_MAGIC, 1, struct isst_if_cpu_map *)
138	#define ISST_IF_IO_CMD _IOW(ISST_IF_MAGIC, 2, struct isst_if_io_regs *)	169	#define ISST_IF_IO_CMD _IOW(ISST_IF_MAGIC, 2, struct isst_if_io_regs *)
139	#define ISST_IF_MBOX_COMMAND _IOWR(ISST_IF_MAGIC, 3, struct isst_if_mbox_cmds *)	170	#define ISST_IF_MBOX_COMMAND _IOWR(ISST_IF_MAGIC, 3, struct isst_if_mbox_cmds *)
		171	#define ISST_IF_MSR_COMMAND _IOWR(ISST_IF_MAGIC, 4, struct isst_if_msr_cmds *)
140	#endif	172	#endif