1 // SPDX-License-Identifier: GPL-2.0-only
4  * are supported by the hardware.  See Documentation/arch/riscv/hwprobe.rst for
25 	u64 id = -1ULL;  in hwprobe_arch_id()
32 		switch (pair->key) {  in hwprobe_arch_id()
50 		 * If there's a mismatch for the given set, return -1 in the  in hwprobe_arch_id()
54 			id = -1ULL;  in hwprobe_arch_id()
59 	pair->value = id;  in hwprobe_arch_id()
68 	pair->value = 0;  in hwprobe_isa_ext0()
70 		pair->value |= RISCV_HWPROBE_IMA_FD;  in hwprobe_isa_ext0()
73 		pair->value |= RISCV_HWPROBE_IMA_C;  in hwprobe_isa_ext0()
76 		pair->value |= RISCV_HWPROBE_IMA_V;  in hwprobe_isa_ext0()
87 		if (__riscv_isa_extension_available(isainfo->isa, RISCV_ISA_EXT_##ext))	\  in hwprobe_isa_ext0()
88 			pair->value |= RISCV_HWPROBE_EXT_##ext;				\  in hwprobe_isa_ext0()
115 		EXT_KEY(ZICOND);  in hwprobe_isa_ext0()
169 	pair->value &= ~missing;  in hwprobe_isa_ext0()
184 	u64 perf = -1ULL;  in hwprobe_misaligned()
189 		if (perf == -1ULL)  in hwprobe_misaligned()
198 	if (perf == -1ULL)  in hwprobe_misaligned()
220 	u64 perf = -1ULL;  in hwprobe_vec_misaligned()
226 		if (perf == -1ULL)  in hwprobe_vec_misaligned()
235 	if (perf == -1ULL)  in hwprobe_vec_misaligned()
256 	switch (pair->key) {  in hwprobe_one_pair()
263 	 * The kernel already assumes that the base single-letter ISA  in hwprobe_one_pair()
269 		pair->value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA;  in hwprobe_one_pair()
278 		pair->value = hwprobe_misaligned(cpus);  in hwprobe_one_pair()
282 		pair->value = hwprobe_vec_misaligned(cpus);  in hwprobe_one_pair()
286 		pair->value = 0;  in hwprobe_one_pair()
288 			pair->value = riscv_cboz_block_size;  in hwprobe_one_pair()
291 		pair->value = 0;  in hwprobe_one_pair()
293 			pair->value = riscv_cbom_block_size;  in hwprobe_one_pair()
296 		pair->value = user_max_virt_addr();  in hwprobe_one_pair()
300 		pair->value = riscv_timebase;  in hwprobe_one_pair()
309 	 * call, but get their element key set to -1 and value set to 0  in hwprobe_one_pair()
313 		pair->key = -1;  in hwprobe_one_pair()
314 		pair->value = 0;  in hwprobe_one_pair()
330 		return -EINVAL;  in hwprobe_get_values()
346 			return -EFAULT;  in hwprobe_get_values()
354 			return -EINVAL;  in hwprobe_get_values()
360 		if (get_user(pair.key, &pairs->key))  in hwprobe_get_values()
361 			return -EFAULT;  in hwprobe_get_values()
365 		ret = put_user(pair.key, &pairs->key);  in hwprobe_get_values()
367 			ret = put_user(pair.value, &pairs->value);  in hwprobe_get_values()
370 			return -EFAULT;  in hwprobe_get_values()
387 		return -EINVAL;  in hwprobe_get_cpus()
390 		return -EINVAL;  in hwprobe_get_cpus()
397 		return -EFAULT;  in hwprobe_get_cpus()
412 			return -EFAULT;  in hwprobe_get_cpus()
416 			pair = (struct riscv_hwprobe){ .key = -1, };  in hwprobe_get_cpus()
419 				return -EFAULT;  in hwprobe_get_cpus()
444 		return -EFAULT;  in hwprobe_get_cpus()
481 		avd->all_cpu_hwprobe_values[key] = pair.value;  in init_hwprobe_vdso_data()
494 	 * populated) or any value returns -1 (varies across CPUs), then the  in init_hwprobe_vdso_data()
497 	avd->homogeneous_cpus = id_bitsmash != 0 && id_bitsmash != -1;  in init_hwprobe_vdso_data()