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Diffstat (limited to 'arch/arm64/kvm/handle_exit.c')
-rw-r--r--arch/arm64/kvm/handle_exit.c45
1 files changed, 45 insertions, 0 deletions
diff --git a/arch/arm64/kvm/handle_exit.c b/arch/arm64/kvm/handle_exit.c
index cebe39f3b1b6..6f48336b1d86 100644
--- a/arch/arm64/kvm/handle_exit.c
+++ b/arch/arm64/kvm/handle_exit.c
@@ -291,3 +291,48 @@ void handle_exit_early(struct kvm_vcpu *vcpu, int exception_index)
if (exception_index == ARM_EXCEPTION_EL1_SERROR)
kvm_handle_guest_serror(vcpu, kvm_vcpu_get_esr(vcpu));
}
+
+void __noreturn __cold nvhe_hyp_panic_handler(u64 esr, u64 spsr, u64 elr,
+ u64 par, uintptr_t vcpu,
+ u64 far, u64 hpfar) {
+ u64 elr_in_kimg = __phys_to_kimg(__hyp_pa(elr));
+ u64 hyp_offset = elr_in_kimg - kaslr_offset() - elr;
+ u64 mode = spsr & PSR_MODE_MASK;
+
+ /*
+ * The nVHE hyp symbols are not included by kallsyms to avoid issues
+ * with aliasing. That means that the symbols cannot be printed with the
+ * "%pS" format specifier, so fall back to the vmlinux address if
+ * there's no better option.
+ */
+ if (mode != PSR_MODE_EL2t && mode != PSR_MODE_EL2h) {
+ kvm_err("Invalid host exception to nVHE hyp!\n");
+ } else if (ESR_ELx_EC(esr) == ESR_ELx_EC_BRK64 &&
+ (esr & ESR_ELx_BRK64_ISS_COMMENT_MASK) == BUG_BRK_IMM) {
+ struct bug_entry *bug = find_bug(elr_in_kimg);
+ const char *file = NULL;
+ unsigned int line = 0;
+
+ /* All hyp bugs, including warnings, are treated as fatal. */
+ if (bug)
+ bug_get_file_line(bug, &file, &line);
+
+ if (file)
+ kvm_err("nVHE hyp BUG at: %s:%u!\n", file, line);
+ else
+ kvm_err("nVHE hyp BUG at: %016llx!\n", elr + hyp_offset);
+ } else {
+ kvm_err("nVHE hyp panic at: %016llx!\n", elr + hyp_offset);
+ }
+
+ /*
+ * Hyp has panicked and we're going to handle that by panicking the
+ * kernel. The kernel offset will be revealed in the panic so we're
+ * also safe to reveal the hyp offset as a debugging aid for translating
+ * hyp VAs to vmlinux addresses.
+ */
+ kvm_err("Hyp Offset: 0x%llx\n", hyp_offset);
+
+ panic("HYP panic:\nPS:%08llx PC:%016llx ESR:%08llx\nFAR:%016llx HPFAR:%016llx PAR:%016llx\nVCPU:%016lx\n",
+ spsr, elr, esr, far, hpfar, par, vcpu);
+}