From e765f37b9b8b4fa65682e9a78a2ca2b11d3d9096 Mon Sep 17 00:00:00 2001 From: Srinivas Pandruvada Date: Wed, 26 Jun 2019 15:38:49 -0700 Subject: 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. Signed-off-by: Srinivas Pandruvada Signed-off-by: Andy Shevchenko --- include/uapi/linux/isst_if.h | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) (limited to 'include/uapi/linux/isst_if.h') diff --git a/include/uapi/linux/isst_if.h b/include/uapi/linux/isst_if.h index e4b1c2ec3279..d10b832c58c5 100644 --- a/include/uapi/linux/isst_if.h +++ b/include/uapi/linux/isst_if.h @@ -132,9 +132,41 @@ struct isst_if_mbox_cmds { struct isst_if_mbox_cmd mbox_cmd[1]; }; +/** + * struct isst_if_msr_cmd - Structure to define msr command + * @read_write: Value 0: Read, 1: Write + * @logical_cpu: Logical CPU number + * @msr: MSR number + * @data: For write operation, data to write, for read + * place holder + * + * Structure to specify MSR command related to PUNIT. + */ +struct isst_if_msr_cmd { + __u32 read_write; /* Read:0, Write:1 */ + __u32 logical_cpu; + __u64 msr; + __u64 data; +}; + +/** + * struct isst_if_msr_cmds - structure for msr commands + * @cmd_count: Number of mailbox commands in msr_cmd[] + * @msr_cmd[]: Holds one or more msr commands + * + * This structure used with ioctl ISST_IF_MSR_COMMAND to send + * one or more MSR commands. IOCTL return value indicates number of + * commands sent or error number if no commands have been sent. + */ +struct isst_if_msr_cmds { + __u32 cmd_count; + struct isst_if_msr_cmd msr_cmd[1]; +}; + #define ISST_IF_MAGIC 0xFE #define ISST_IF_GET_PLATFORM_INFO _IOR(ISST_IF_MAGIC, 0, struct isst_if_platform_info *) #define ISST_IF_GET_PHY_ID _IOWR(ISST_IF_MAGIC, 1, struct isst_if_cpu_map *) #define ISST_IF_IO_CMD _IOW(ISST_IF_MAGIC, 2, struct isst_if_io_regs *) #define ISST_IF_MBOX_COMMAND _IOWR(ISST_IF_MAGIC, 3, struct isst_if_mbox_cmds *) +#define ISST_IF_MSR_COMMAND _IOWR(ISST_IF_MAGIC, 4, struct isst_if_msr_cmds *) #endif -- cgit v1.2.3-70-g09d2