1 // SPDX-License-Identifier: GPL-2.0-only
4  * are supported by the hardware.  See Documentation/arch/riscv/hwprobe.rst for
30 	u64 id = -1ULL;  in hwprobe_arch_id()
34 	if (pair->key != RISCV_HWPROBE_KEY_MVENDORID &&  in hwprobe_arch_id()
35 	    pair->key != RISCV_HWPROBE_KEY_MIMPID &&  in hwprobe_arch_id()
36 	    pair->key != RISCV_HWPROBE_KEY_MARCHID)  in hwprobe_arch_id()
42 		switch (pair->key) {  in hwprobe_arch_id()
60 		 * If there's a mismatch for the given set, return -1 in the  in hwprobe_arch_id()
64 			id = -1ULL;  in hwprobe_arch_id()
70 	pair->value = id;  in hwprobe_arch_id()
79 	pair->value = 0;  in hwprobe_isa_ext0()
81 		pair->value |= RISCV_HWPROBE_IMA_FD;  in hwprobe_isa_ext0()
84 		pair->value |= RISCV_HWPROBE_IMA_C;  in hwprobe_isa_ext0()
87 		pair->value |= RISCV_HWPROBE_IMA_V;  in hwprobe_isa_ext0()
98 		if (__riscv_isa_extension_available(isainfo->isa, RISCV_ISA_EXT_##ext))	\  in hwprobe_isa_ext0()
99 			pair->value |= RISCV_HWPROBE_EXT_##ext;				\  in hwprobe_isa_ext0()
111 		EXT_KEY(ZACAS);  in hwprobe_isa_ext0()
179 	pair->value &= ~missing;  in hwprobe_isa_ext0()
194 	u64 perf = -1ULL;  in hwprobe_misaligned()
199 		if (perf == -1ULL)  in hwprobe_misaligned()
208 	if (perf == -1ULL)  in hwprobe_misaligned()
230 	u64 perf = -1ULL;  in hwprobe_vec_misaligned()
236 		if (perf == -1ULL)  in hwprobe_vec_misaligned()
245 	if (perf == -1ULL)  in hwprobe_vec_misaligned()
266 	switch (pair->key) {  in hwprobe_one_pair()
273 	 * The kernel already assumes that the base single-letter ISA  in hwprobe_one_pair()
279 		pair->value = RISCV_HWPROBE_BASE_BEHAVIOR_IMA;  in hwprobe_one_pair()
288 		pair->value = hwprobe_misaligned(cpus);  in hwprobe_one_pair()
292 		pair->value = hwprobe_vec_misaligned(cpus);  in hwprobe_one_pair()
296 		pair->value = 0;  in hwprobe_one_pair()
298 			pair->value = riscv_cboz_block_size;  in hwprobe_one_pair()
301 		pair->value = 0;  in hwprobe_one_pair()
303 			pair->value = riscv_cbom_block_size;  in hwprobe_one_pair()
306 		pair->value = user_max_virt_addr();  in hwprobe_one_pair()
310 		pair->value = riscv_timebase;  in hwprobe_one_pair()
326 	 * call, but get their element key set to -1 and value set to 0  in hwprobe_one_pair()
330 		pair->key = -1;  in hwprobe_one_pair()
331 		pair->value = 0;  in hwprobe_one_pair()
347 		return -EINVAL;  in hwprobe_get_values()
363 			return -EFAULT;  in hwprobe_get_values()
371 			return -EINVAL;  in hwprobe_get_values()
377 		if (get_user(pair.key, &pairs->key))  in hwprobe_get_values()
378 			return -EFAULT;  in hwprobe_get_values()
382 		ret = put_user(pair.key, &pairs->key);  in hwprobe_get_values()
384 			ret = put_user(pair.value, &pairs->value);  in hwprobe_get_values()
387 			return -EFAULT;  in hwprobe_get_values()
404 		return -EINVAL;  in hwprobe_get_cpus()
407 		return -EINVAL;  in hwprobe_get_cpus()
414 		return -EFAULT;  in hwprobe_get_cpus()
429 			return -EFAULT;  in hwprobe_get_cpus()
433 			pair = (struct riscv_hwprobe){ .key = -1, };  in hwprobe_get_cpus()
436 				return -EFAULT;  in hwprobe_get_cpus()
461 		return -EFAULT;  in hwprobe_get_cpus()
502 		avd->all_cpu_hwprobe_values[key] = pair.value;  in complete_hwprobe_vdso_data()
515 	 * populated) or any value returns -1 (varies across CPUs), then the  in complete_hwprobe_vdso_data()
518 	avd->homogeneous_cpus = id_bitsmash != 0 && id_bitsmash != -1;  in complete_hwprobe_vdso_data()
526 	avd->ready = true;  in complete_hwprobe_vdso_data()
538 	avd->ready = false;  in init_hwprobe_vdso_data()