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()
111 		EXT_KEY(ZICOND);  in hwprobe_isa_ext0()
161 	pair->value &= ~missing;  in hwprobe_isa_ext0()
176 	u64 perf = -1ULL;  in hwprobe_misaligned()
181 		if (perf == -1ULL)  in hwprobe_misaligned()
190 	if (perf == -1ULL)  in hwprobe_misaligned()
212 	u64 perf = -1ULL;  in hwprobe_vec_misaligned()
218 		if (perf == -1ULL)  in hwprobe_vec_misaligned()
227 	if (perf == -1ULL)  in hwprobe_vec_misaligned()
248 	switch (pair->key) {  in hwprobe_one_pair()
255 	 * The kernel already assumes that the base single-letter ISA  in hwprobe_one_pair()
261 		pair->value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA;  in hwprobe_one_pair()
270 		pair->value = hwprobe_misaligned(cpus);  in hwprobe_one_pair()
274 		pair->value = hwprobe_vec_misaligned(cpus);  in hwprobe_one_pair()
278 		pair->value = 0;  in hwprobe_one_pair()
280 			pair->value = riscv_cboz_block_size;  in hwprobe_one_pair()
283 		pair->value = user_max_virt_addr();  in hwprobe_one_pair()
287 		pair->value = riscv_timebase;  in hwprobe_one_pair()
296 	 * call, but get their element key set to -1 and value set to 0  in hwprobe_one_pair()
300 		pair->key = -1;  in hwprobe_one_pair()
301 		pair->value = 0;  in hwprobe_one_pair()
317 		return -EINVAL;  in hwprobe_get_values()
333 			return -EFAULT;  in hwprobe_get_values()
341 			return -EINVAL;  in hwprobe_get_values()
347 		if (get_user(pair.key, &pairs->key))  in hwprobe_get_values()
348 			return -EFAULT;  in hwprobe_get_values()
352 		ret = put_user(pair.key, &pairs->key);  in hwprobe_get_values()
354 			ret = put_user(pair.value, &pairs->value);  in hwprobe_get_values()
357 			return -EFAULT;  in hwprobe_get_values()
374 		return -EINVAL;  in hwprobe_get_cpus()
377 		return -EINVAL;  in hwprobe_get_cpus()
384 		return -EFAULT;  in hwprobe_get_cpus()
399 			return -EFAULT;  in hwprobe_get_cpus()
403 			pair = (struct riscv_hwprobe){ .key = -1, };  in hwprobe_get_cpus()
406 				return -EFAULT;  in hwprobe_get_cpus()
431 		return -EFAULT;  in hwprobe_get_cpus()
454 	struct arch_vdso_time_data *avd = &vd->arch_data;  in init_hwprobe_vdso_data()
469 		avd->all_cpu_hwprobe_values[key] = pair.value;  in init_hwprobe_vdso_data()
482 	 * populated) or any value returns -1 (varies across CPUs), then the  in init_hwprobe_vdso_data()
485 	avd->homogeneous_cpus = id_bitsmash != 0 && id_bitsmash != -1;  in init_hwprobe_vdso_data()