diff options
Diffstat (limited to 'arch/arm64/kvm/stacktrace.c')
-rw-r--r-- | arch/arm64/kvm/stacktrace.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/arch/arm64/kvm/stacktrace.c b/arch/arm64/kvm/stacktrace.c index 9812aefdcfb4..4d5fec3175ff 100644 --- a/arch/arm64/kvm/stacktrace.c +++ b/arch/arm64/kvm/stacktrace.c @@ -21,6 +21,61 @@ #include <asm/stacktrace/nvhe.h> +static bool on_overflow_stack(unsigned long sp, unsigned long size, + struct stack_info *info) +{ + struct kvm_nvhe_stacktrace_info *stacktrace_info + = this_cpu_ptr_nvhe_sym(kvm_stacktrace_info); + unsigned long low = (unsigned long)stacktrace_info->overflow_stack_base; + unsigned long high = low + OVERFLOW_STACK_SIZE; + + return on_stack(sp, size, low, high, STACK_TYPE_OVERFLOW, info); +} + +static bool on_hyp_stack(unsigned long sp, unsigned long size, + struct stack_info *info) +{ + struct kvm_nvhe_stacktrace_info *stacktrace_info + = this_cpu_ptr_nvhe_sym(kvm_stacktrace_info); + unsigned long low = (unsigned long)stacktrace_info->stack_base; + unsigned long high = low + PAGE_SIZE; + + return on_stack(sp, size, low, high, STACK_TYPE_HYP, info); +} + +static bool on_accessible_stack(const struct task_struct *tsk, + unsigned long sp, unsigned long size, + struct stack_info *info) +{ + if (info) + info->type = STACK_TYPE_UNKNOWN; + + return (on_overflow_stack(sp, size, info) || + on_hyp_stack(sp, size, info)); +} + +static int unwind_next(struct unwind_state *state) +{ + struct stack_info info; + + return unwind_next_common(state, &info, on_accessible_stack, + kvm_nvhe_stack_kern_va); +} + +static void unwind(struct unwind_state *state, + stack_trace_consume_fn consume_entry, void *cookie) +{ + while (1) { + int ret; + + if (!consume_entry(cookie, state->pc)) + break; + ret = unwind_next(state); + if (ret < 0) + break; + } +} + /* * kvm_nvhe_dump_backtrace_entry - Symbolize and print an nVHE backtrace entry * |