[src/trunk]: src/sys Change kcsan_md_is_avail() to always return true; I was ...

[maxv <maxv%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/da68ad366326
branches:  trunk
changeset: 460842:da68ad366326
user:      maxv <maxv%NetBSD.org@localhost>
date:      Wed Nov 06 06:57:22 2019 +0000

description:
Change kcsan_md_is_avail() to always return true; I was testing with
interrupts disabled as debugging. Change the delay/sample parameters
to have better fluidity.

diffstat:

 sys/arch/amd64/include/csan.h |  4 ++--
 sys/kern/subr_csan.c          |  8 ++++----
 2 files changed, 6 insertions(+), 6 deletions(-)

diffs (47 lines):

diff -r 34157cd0e933 -r da68ad366326 sys/arch/amd64/include/csan.h
--- a/sys/arch/amd64/include/csan.h     Wed Nov 06 04:17:16 2019 +0000
+++ b/sys/arch/amd64/include/csan.h     Wed Nov 06 06:57:22 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: csan.h,v 1.1 2019/11/05 20:19:17 maxv Exp $    */
+/*     $NetBSD: csan.h,v 1.2 2019/11/06 06:57:22 maxv Exp $    */
 
 /*
  * Copyright (c) 2019 The NetBSD Foundation, Inc.
@@ -35,7 +35,7 @@
 static inline bool
 kcsan_md_is_avail(void)
 {
-       return (x86_read_psl() & PSL_I) == 0;
+       return true;
 }
 
 static inline void
diff -r 34157cd0e933 -r da68ad366326 sys/kern/subr_csan.c
--- a/sys/kern/subr_csan.c      Wed Nov 06 04:17:16 2019 +0000
+++ b/sys/kern/subr_csan.c      Wed Nov 06 06:57:22 2019 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: subr_csan.c,v 1.1 2019/11/05 20:19:17 maxv Exp $       */
+/*     $NetBSD: subr_csan.c,v 1.2 2019/11/06 06:57:22 maxv Exp $       */
 
 /*
  * Copyright (c) 2019 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: subr_csan.c,v 1.1 2019/11/05 20:19:17 maxv Exp $");
+__KERNEL_RCSID(0, "$NetBSD: subr_csan.c,v 1.2 2019/11/06 06:57:22 maxv Exp $");
 
 #include "opt_kcsan.h"
 
@@ -69,8 +69,8 @@
 
 #define __RET_ADDR     (uintptr_t)__builtin_return_address(0)
 
-#define KCSAN_NACCESSES        2000
-#define KCSAN_DELAY    10000   /* 10 milliseconds */
+#define KCSAN_NACCESSES        1024
+#define KCSAN_DELAY    10      /* 10 microseconds */
 
 /* -------------------------------------------------------------------------- */