1 /* SPDX-License-Identifier: GPL-2.0-only */
7  *   1) Non-protected nVHE mode - the host can directly access the
9  *      to allocate shared buffers for the host to read the unwinded
12  *   2) pKVM (protected nVHE) mode - the host cannot directly access
13  *      the HYP memory. The stack is unwinded in EL2 and dumped to a shared
28 	unsigned long low = (unsigned long)stacktrace_info->overflow_stack_base;  in stackinfo_get_overflow()  local
29 	unsigned long high = low + OVERFLOW_STACK_SIZE;  in stackinfo_get_overflow()  local
32 		.low = low,  in stackinfo_get_overflow()
33 		.high = high,  in stackinfo_get_overflow()
39 	unsigned long low = (unsigned long)this_cpu_ptr_nvhe_sym(overflow_stack);  in stackinfo_get_overflow_kern_va()  local
40 	unsigned long high = low + OVERFLOW_STACK_SIZE;  in stackinfo_get_overflow_kern_va()  local
43 		.low = low,  in stackinfo_get_overflow_kern_va()
44 		.high = high,  in stackinfo_get_overflow_kern_va()
52 	unsigned long low = (unsigned long)stacktrace_info->stack_base;  in stackinfo_get_hyp()  local
53 	unsigned long high = low + PAGE_SIZE;  in stackinfo_get_hyp()  local
56 		.low = low,  in stackinfo_get_hyp()
57 		.high = high,  in stackinfo_get_hyp()
63 	unsigned long low = (unsigned long)*this_cpu_ptr(&kvm_arm_hyp_stack_page);  in stackinfo_get_hyp_kern_va()  local
64 	unsigned long high = low + PAGE_SIZE;  in stackinfo_get_hyp_kern_va()  local
67 		.low = low,  in stackinfo_get_hyp_kern_va()
68 		.high = high,  in stackinfo_get_hyp_kern_va()
73  * kvm_nvhe_stack_kern_va - Convert KVM nVHE HYP stack addresses to a kernel VAs
75  * The nVHE hypervisor stack is mapped in the flexible 'private' VA range, to
82  * Returns true on success and updates @addr to its corresponding kernel VA;
102 	*addr = *addr - stack_hyp.low + stack_kern.low;  in kvm_nvhe_stack_kern_va()
107  * Convert a KVN nVHE HYP frame record address to a kernel VA
117 	 * The FP is in the hypervisor VA space. Convert it to the kernel VA  in unwind_next()
120 	if (!kvm_nvhe_stack_kern_record_va(&state->fp))  in unwind_next()
121 		return -EINVAL;  in unwind_next()
132 		if (!consume_entry(cookie, state->pc))  in unwind()
141  * kvm_nvhe_dump_backtrace_entry - Symbolize and print an nVHE backtrace entry
144  * @where  : the program counter corresponding to the stack frame
148 	unsigned long va_mask = GENMASK_ULL(vabits_actual - 1, 0);  in kvm_nvhe_dump_backtrace_entry()
151 	/* Mask tags and convert to kern addr */  in kvm_nvhe_dump_backtrace_entry()
165 	kvm_err("---[ end nVHE call trace ]---\n");  in kvm_nvhe_dump_backtrace_end()
169  * hyp_dump_backtrace - Dump the non-protected nVHE backtrace.
173  * The host can directly access HYP stack pages in non-protected
192 	kvm_nvhe_unwind_init(&state, stacktrace_info->fp, stacktrace_info->pc);  in hyp_dump_backtrace()
204  * pkvm_dump_backtrace - Dump the protected nVHE HYP backtrace.
235  * kvm_nvhe_dump_backtrace - Dump KVM nVHE hypervisor backtrace.