Differential D49592 Diff 153053 sys/amd64/amd64/trap.c

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sys/amd64/amd64/trap.c

Show First 20 Lines • Show All 157 Lines • ▼ Show 20 Lines	return (type < nitems(trap_msg) ? trap_msg[type] :
"unknown/reserved trap");		"unknown/reserved trap");
}		}

static int uprintf_signal;		static int uprintf_signal;
SYSCTL_INT(_machdep, OID_AUTO, uprintf_signal, CTLFLAG_RWTUN,		SYSCTL_INT(_machdep, OID_AUTO, uprintf_signal, CTLFLAG_RWTUN,
&uprintf_signal, 0,		&uprintf_signal, 0,
"Print debugging information on trap signal to ctty");		"Print debugging information on trap signal to ctty");

		u_long cnt_efirt_faults;
		int print_efirt_faults = 1;

/*		/*
* Control L1D flush on return from NMI.		* Control L1D flush on return from NMI.
*		*
* Tunable can be set to the following values:		* Tunable can be set to the following values:
* 0 - only enable flush on return from NMI if required by vmm.ko (default)		* 0 - only enable flush on return from NMI if required by vmm.ko (default)
* >1 - always flush on return from NMI.		* >1 - always flush on return from NMI.
*		*
* Post-boot, the sysctl indicates if flushing is currently enabled.		* Post-boot, the sysctl indicates if flushing is currently enabled.
▲ Show 20 Lines • Show All 252 Lines • ▼ Show 20 Lines	#endif

/*		/*
* Most likely, EFI RT faulted. This check prevents		* Most likely, EFI RT faulted. This check prevents
* kdb from handling breakpoints set on the BIOS text,		* kdb from handling breakpoints set on the BIOS text,
* if such option is ever needed.		* if such option is ever needed.
*/		*/
if ((td->td_pflags & TDP_EFIRT) != 0 &&		if ((td->td_pflags & TDP_EFIRT) != 0 &&
curpcb->pcb_onfault != NULL && type != T_PAGEFLT) {		curpcb->pcb_onfault != NULL && type != T_PAGEFLT) {
		u_long cnt = atomic_fetchadd_long(&cnt_efirt_faults, 1);

		if ((print_efirt_faults == 1 && cnt == 1) \|\|
		print_efirt_faults == 2) {
trap_diag(frame, 0);		trap_diag(frame, 0);
printf("EFI RT fault %s\n", traptype_to_msg(type));		printf("EFI RT fault %s\n",
		traptype_to_msg(type));
		}
frame->tf_rip = (long)curpcb->pcb_onfault;		frame->tf_rip = (long)curpcb->pcb_onfault;
return;		return;
}		}

switch (type) {		switch (type) {
case T_PAGEFLT: /* page fault */		case T_PAGEFLT: /* page fault */
(void)trap_pfault(frame, false, NULL, NULL);		(void)trap_pfault(frame, false, NULL, NULL);
return;		return;
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