RMP #PFs on kernel addresses are fatal and should never happen in practice. They indicate a bug in the host kernel somewhere, so dump some information about any RMP entries related to the faulting address to aid with debugging. Signed-off-by: Michael Roth <michael.roth@xxxxxxx> --- arch/x86/mm/fault.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/arch/x86/mm/fault.c b/arch/x86/mm/fault.c index 7858b9515d4a..9f154beef9c7 100644 --- a/arch/x86/mm/fault.c +++ b/arch/x86/mm/fault.c @@ -34,6 +34,7 @@ #include <asm/kvm_para.h> /* kvm_handle_async_pf */ #include <asm/vdso.h> /* fixup_vdso_exception() */ #include <asm/irq_stack.h> +#include <asm/sev-host.h> /* sev_dump_rmpentry() */ #define CREATE_TRACE_POINTS #include <asm/trace/exceptions.h> @@ -580,6 +581,9 @@ show_fault_oops(struct pt_regs *regs, unsigned long error_code, unsigned long ad } dump_pagetable(address); + + if (error_code & X86_PF_RMP) + sev_dump_hva_rmpentry(address); } static noinline void -- 2.25.1
