riscv/kernel/cpufeature.c

53  * riscv_isa_extension_base() - Get base extension word
56  * Return: base extension word as unsigned long value
69  * __riscv_isa_extension_available() - Check whether given extension
73  * @bit: bit position of the desired extension
127 /* Used to declare pure "lasso" extension (Zk for instance) */
207  * privileged ISA, the existence of the CSRs is implied by any extension which
208  * specifies [ms]envcfg bit(s). Hence, we define a custom ISA extension for the
216  * The canonical order of ISA extension names in the ISA string is defined in
232  *    closely related alphabetical extension category, IMAFDQLCBKJTPVH.
372 			 * multi-letter extension in the ISA string begins with  in riscv_parse_isa_string()
387 			 * Before attempting to parse the extension itself, we find its end.  in riscv_parse_isa_string()
389 			 * extensions with an "_", the end of a multi-letter extension will  in riscv_parse_isa_string()
391 			 * multi-letter extension.  in riscv_parse_isa_string()
395 			 * the end of the extension, removing any numbers. This may be a  in riscv_parse_isa_string()
400 			 * name portion of an extension, but will be decremented to the last  in riscv_parse_isa_string()
436 			 * that it arrived at the start of the next extension.  in riscv_parse_isa_string()
439 			 * we have a multi-letter extension's _, or the start of an  in riscv_parse_isa_string()
440 			 * extension.  in riscv_parse_isa_string()
442 			 * Otherwise we have found the current extension's major version  in riscv_parse_isa_string()
444 			 * if present. The `p` extension must not appear immediately after  in riscv_parse_isa_string()
475 		 * first character of the next extension. As we stop parsing an extension  in riscv_parse_isa_string()
477 		 * where the succeeding extension is a multi-letter prefixed with an "_".  in riscv_parse_isa_string()
1033 			WARN(1, "This extension id:%d is not in ISA extension list", id);  in riscv_cpufeature_patch_func()