3  * Based on arch/arm/mm/fault.c
45 #include <trace/hooks/fault.h>
274 	 * If we now have a valid translation, treat the translation fault as  in is_spurious_el1_translation_fault()
281 	 * If we got a different type of fault from the AT instruction,  in is_spurious_el1_translation_fault()
282 	 * treat the translation fault as spurious.  in is_spurious_el1_translation_fault()
344 	 * tag fault.  in do_tag_recovery()
370 	 * Are we prepared to handle this kernel fault?  in __do_kernel_fault()
377 	    "Ignoring spurious kernel translation fault at virtual address %016lx\n", addr))  in __do_kernel_fault()
414 	 * an alignment fault not caused by the memory type would take  in set_thread_esr()
415 	 * precedence over translation fault for a real access to empty  in set_thread_esr()
416 	 * space. Unfortunately we can't easily distinguish "alignment fault  in set_thread_esr()
417 	 * not caused by memory type" from "alignment fault caused by memory  in set_thread_esr()
419 	 * fault.)  in set_thread_esr()
429 			 * We always report the ESR as if the fault was taken  in set_thread_esr()
431 			 * clear. (In fact it always will be a fault to EL1.)  in set_thread_esr()
439 			 * Claim a level 0 translation fault.  in set_thread_esr()
469 	 * handle this fault with.  in do_bad_area()
504 	 * Check that the permissions on the VMA allow for the fault which  in __do_page_fault()
519  * should fault. EL0 cannot issue DC IVAC (undef).
531 	vm_fault_t fault;  in do_page_fault()  local
542 	 * the fault.  in do_page_fault()
576 	 * let's try a speculative page fault without grabbing the  in do_page_fault()
579 	fault = handle_speculative_fault(mm, addr, mm_flags, &vma, regs);  in do_page_fault()
580 	if (fault != VM_FAULT_RETRY)  in do_page_fault()
609 	fault = __do_page_fault(vma, addr, mm_flags, vm_flags, regs);  in do_page_fault()
612 	if (fault_signal_pending(fault, regs)) {  in do_page_fault()
618 	if (fault & VM_FAULT_RETRY) {  in do_page_fault()
638 	if (likely(!(fault & (VM_FAULT_ERROR | VM_FAULT_BADMAP |  in do_page_fault()
644 	 * handle this fault with.  in do_page_fault()
649 	if (fault & VM_FAULT_OOM) {  in do_page_fault()
652 		 * userspace (which will retry the fault, or kill us if we got  in do_page_fault()
661 	if (fault & VM_FAULT_SIGBUS) {  in do_page_fault()
664 		 * this page fault.  in do_page_fault()
667 	} else if (fault & (VM_FAULT_HWPOISON_LARGE | VM_FAULT_HWPOISON)) {  in do_page_fault()
671 		if (fault & VM_FAULT_HWPOISON_LARGE)  in do_page_fault()
672 			lsb = hstate_index_to_shift(VM_FAULT_GET_HINDEX(fault));  in do_page_fault()
681 				      fault == VM_FAULT_BADACCESS ? SEGV_ACCERR : SEGV_MAPERR,  in do_page_fault()
774 	{ do_bad,		SIGKILL, SI_KERNEL,	"ttbr address size fault"	},
775 	{ do_bad,		SIGKILL, SI_KERNEL,	"level 1 address size fault"	},
776 	{ do_bad,		SIGKILL, SI_KERNEL,	"level 2 address size fault"	},
777 	{ do_bad,		SIGKILL, SI_KERNEL,	"level 3 address size fault"	},
778 	{ do_translation_fault,	SIGSEGV, SEGV_MAPERR,	"level 0 translation fault"	},
779 	{ do_translation_fault,	SIGSEGV, SEGV_MAPERR,	"level 1 translation fault"	},
780 	{ do_translation_fault,	SIGSEGV, SEGV_MAPERR,	"level 2 translation fault"	},
781 	{ do_translation_fault,	SIGSEGV, SEGV_MAPERR,	"level 3 translation fault"	},
783 	{ do_page_fault,	SIGSEGV, SEGV_ACCERR,	"level 1 access flag fault"	},
784 	{ do_page_fault,	SIGSEGV, SEGV_ACCERR,	"level 2 access flag fault"	},
785 	{ do_page_fault,	SIGSEGV, SEGV_ACCERR,	"level 3 access flag fault"	},
787 	{ do_page_fault,	SIGSEGV, SEGV_ACCERR,	"level 1 permission fault"	},
788 	{ do_page_fault,	SIGSEGV, SEGV_ACCERR,	"level 2 permission fault"	},
789 	{ do_page_fault,	SIGSEGV, SEGV_ACCERR,	"level 3 permission fault"	},
791 	{ do_tag_check_fault,	SIGSEGV, SEGV_MTESERR,	"synchronous tag check fault"	},
807 	{ do_alignment_fault,	SIGBUS,  BUS_ADRALN,	"alignment fault"		},
823 	{ do_bad,		SIGKILL, SI_KERNEL,	"Unsupported atomic hardware update fault"	},
826 	{ do_bad,		SIGKILL, SI_KERNEL,	"implementation fault (lockdown abort)" },
827 	{ do_bad,		SIGBUS,  BUS_OBJERR,	"implementation fault (unsupported exclusive)" },
835 	{ do_bad,		SIGKILL, SI_KERNEL,	"section domain fault"		},
836 	{ do_bad,		SIGKILL, SI_KERNEL,	"page domain fault"		},
849 		pr_alert("Unhandled fault at 0x%016lx\n", addr);  in do_mem_abort()
856 	 * At this point we have an unrecognized fault type whose tag bits may  in do_mem_abort()
985  * Used during anonymous page fault handling.