D48964.diff
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D48964.diff
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	diff --git a/sys/arm64/arm64/machdep.c b/sys/arm64/arm64/machdep.c
	--- a/sys/arm64/arm64/machdep.c
	+++ b/sys/arm64/arm64/machdep.c
	@@ -59,6 +59,7 @@
	#include <sys/sched.h>
	#include <sys/signalvar.h>
	#include <sys/syscallsubr.h>
	+#include <sys/sysctl.h>
	#include <sys/sysent.h>
	#include <sys/sysproto.h>
	#include <sys/ucontext.h>
	@@ -173,6 +174,21 @@
	SYSINIT(ssp_warn2, SI_SUB_LAST, SI_ORDER_ANY, print_ssp_warning, NULL);
	#endif

	+static int
	+sysctl_current_el(SYSCTL_HANDLER_ARGS)
	+{
	+ int error, el;
	+
	+ el = (READ_SPECIALREG(CurrentEL) & CURRENTEL_EL_MASK) >>
	+ CURRENTEL_EL_SHIFT;
	+ error = sysctl_handle_int(oidp, &el, 0, req);
	+ if (error == 0 && req->newptr != NULL)
	+ return (EINVAL);
	+ return (error);
	+}
	+SYSCTL_PROC(_machdep, OID_AUTO, current_el, CTLTYPE_INT \| CTLFLAG_RD,
	+ NULL, 0, sysctl_current_el, "I", "Kernel exception level");
	+
	static bool
	pan_check(const struct cpu_feat *feat __unused, u_int midr __unused)
	{