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x86: Check for biglock leakage in interrupt handlers.

This commit is contained in:
riastradh 2022-03-12 15:50:44 +00:00
parent d8cd23d6aa
commit 8382e30f24
2 changed files with 10 additions and 3 deletions
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3
sys/arch/x86/include/intr.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: intr.h,v 1.62 2020/04/25 15:26:18 bouyer Exp $ */
/* $NetBSD: intr.h,v 1.63 2022/03/12 15:50:44 riastradh Exp $ */
/*-
* Copyright (c) 1998, 2001, 2006, 2007, 2008, 2019 The NetBSD Foundation, Inc.
@ -145,6 +145,7 @@ struct intrhand {
struct intrhand *ih_evt_next;
#endif
struct cpu_info *ih_cpu;
char ih_xname[INTRDEVNAMEBUF];
};
#define IMASK(ci,level) (ci)->ci_imask[(level)]

10
sys/arch/x86/x86/intr.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: intr.c,v 1.159 2021/12/23 02:45:43 yamaguchi Exp $ */
/* $NetBSD: intr.c,v 1.160 2022/03/12 15:50:45 riastradh Exp $ */
/*
* Copyright (c) 2007, 2008, 2009, 2019 The NetBSD Foundation, Inc.
@ -133,7 +133,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.159 2021/12/23 02:45:43 yamaguchi Exp $");
__KERNEL_RCSID(0, "$NetBSD: intr.c,v 1.160 2022/03/12 15:50:45 riastradh Exp $");
#include "opt_intrdebug.h"
#include "opt_multiprocessor.h"
@ -653,11 +653,16 @@ static int
intr_biglock_wrapper(void *vp)
{
struct intrhand *ih = vp;
int locks;
int ret;
KERNEL_LOCK(1, NULL);
locks = curcpu()->ci_biglock_count;
ret = (*ih->ih_realfun)(ih->ih_realarg);
KASSERTMSG(locks == curcpu()->ci_biglock_count,
"%s @ %p slipped locks %d -> %d",
ih->ih_xname, ih->ih_realfun, locks, curcpu()->ci_biglock_count);
KERNEL_UNLOCK_ONE(NULL);
@ -904,6 +909,7 @@ intr_establish_xname(int legacy_irq, struct pic *pic, int pin, int type,
ih->ih_pin = pin;
ih->ih_cpu = ci;
ih->ih_slot = slot;
strlcpy(ih->ih_xname, xname, sizeof(ih->ih_xname));
#ifdef MULTIPROCESSOR
if (!mpsafe) {
ih->ih_fun = intr_biglock_wrapper;