1 // SPDX-License-Identifier: GPL-2.0+
16 #include <asm/asm-prototypes.h>
17 #include <asm/code-patching.h>
61 	 * is not updated, but that's harmless as it's a no-op.  in setup_barrier_nospec()
86 		return -EINVAL;  in barrier_nospec_set()
153 		seq_buf_init(&s, buf, PAGE_SIZE - 1);  in cpu_show_meltdown()
184 	seq_buf_init(&s, buf, PAGE_SIZE - 1);  in cpu_show_spectre_v1()
207 	seq_buf_init(&s, buf, PAGE_SIZE - 1);  in cpu_show_spectre_v2()
228 			seq_buf_printf(&s, " (hardware accelerated)");  in cpu_show_spectre_v2()
240 			seq_buf_printf(&s, " (hardware accelerated)");  in cpu_show_spectre_v2()
250  * Store-forwarding barrier support.
259 	pr_info("stf-barrier: disabled on command line.");  in handle_no_stf_barrier()
310 	/* Default to fallback in case fw-features are not available */  in setup_stf_barrier()
324 		pr_info("stf-barrier: fallback barrier available\n");  in setup_stf_barrier()
326 		pr_info("stf-barrier: hwsync barrier available\n");  in setup_stf_barrier()
328 		pr_info("stf-barrier: eieio barrier available\n");  in setup_stf_barrier()
379 		 * barrier is not a global or per-process mitigation, so the  in ssb_prctl_get()
385 	return -EINVAL;  in ssb_prctl_get()
394 		return -ENODEV;  in arch_prctl_spec_ctrl_get()
408 		return -EINVAL;  in stf_barrier_set()
498 		pr_info("count-cache-flush: flush disabled.\n");  in toggle_branch_cache_flush()
502 			pr_info("count-cache-flush: hardware flush enabled.\n");  in toggle_branch_cache_flush()
505 			pr_info("count-cache-flush: software flush enabled.\n");  in toggle_branch_cache_flush()
513 		pr_info("link-stack-flush: flush disabled.\n");  in toggle_branch_cache_flush()
517 			pr_info("link-stack-flush: hardware flush enabled.\n");  in toggle_branch_cache_flush()
520 			pr_info("link-stack-flush: software flush enabled.\n");  in toggle_branch_cache_flush()
564 	pr_info("rfi-flush: disabled on command line.");  in handle_no_rfi_flush()
572 	pr_info("entry-flush: disabled on command line.");  in handle_no_entry_flush()
580 	pr_info("uaccess-flush: disabled on command line.");  in handle_no_uaccess_flush()
592 	pr_info("rfi-flush: disabling due to 'nopti' on command line.\n");  in handle_no_pti()
655 	 * If there is no d-cache-size property in the device tree, l1d_size  in init_fallback_flush()
657 	 * 2^64-1, and then walking off the end of the fallback area and  in init_fallback_flush()
668 	 * hardware prefetch runoff. We don't have a recipe for load patterns to  in init_fallback_flush()
681 		paca->rfi_flush_fallback_area = l1d_flush_fallback_area;  in init_fallback_flush()
682 		paca->l1d_flush_size = l1d_size;  in init_fallback_flush()
689 		pr_info("rfi-flush: fallback displacement flush available\n");  in setup_rfi_flush()
694 		pr_info("rfi-flush: ori type flush available\n");  in setup_rfi_flush()
697 		pr_info("rfi-flush: mttrig type flush available\n");  in setup_rfi_flush()
733 		return -EINVAL;  in count_cache_flush_set()
771 		return -EINVAL;  in rfi_flush_set()
797 		return -EINVAL;  in entry_flush_set()
823 		return -EINVAL;  in uaccess_flush_set()