1*e4b86885SCheng Sean Ye /*
2*e4b86885SCheng Sean Ye * CDDL HEADER START
3*e4b86885SCheng Sean Ye *
4*e4b86885SCheng Sean Ye * The contents of this file are subject to the terms of the
5*e4b86885SCheng Sean Ye * Common Development and Distribution License (the "License").
6*e4b86885SCheng Sean Ye * You may not use this file except in compliance with the License.
7*e4b86885SCheng Sean Ye *
8*e4b86885SCheng Sean Ye * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9*e4b86885SCheng Sean Ye * or http://www.opensolaris.org/os/licensing.
10*e4b86885SCheng Sean Ye * See the License for the specific language governing permissions
11*e4b86885SCheng Sean Ye * and limitations under the License.
12*e4b86885SCheng Sean Ye *
13*e4b86885SCheng Sean Ye * When distributing Covered Code, include this CDDL HEADER in each
14*e4b86885SCheng Sean Ye * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15*e4b86885SCheng Sean Ye * If applicable, add the following below this CDDL HEADER, with the
16*e4b86885SCheng Sean Ye * fields enclosed by brackets "[]" replaced with your own identifying
17*e4b86885SCheng Sean Ye * information: Portions Copyright [yyyy] [name of copyright owner]
18*e4b86885SCheng Sean Ye *
19*e4b86885SCheng Sean Ye * CDDL HEADER END
20*e4b86885SCheng Sean Ye */
21*e4b86885SCheng Sean Ye
22*e4b86885SCheng Sean Ye /*
23*e4b86885SCheng Sean Ye * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
24*e4b86885SCheng Sean Ye * Use is subject to license terms.
25*e4b86885SCheng Sean Ye */
26*e4b86885SCheng Sean Ye
27*e4b86885SCheng Sean Ye /*
28*e4b86885SCheng Sean Ye * Generic x86 CPU MCA poller - support functions for native and xpv pollers.
29*e4b86885SCheng Sean Ye */
30*e4b86885SCheng Sean Ye
31*e4b86885SCheng Sean Ye #include <sys/types.h>
32*e4b86885SCheng Sean Ye #include <sys/sysmacros.h>
33*e4b86885SCheng Sean Ye #include <sys/sdt.h>
34*e4b86885SCheng Sean Ye #include <sys/cmn_err.h>
35*e4b86885SCheng Sean Ye
36*e4b86885SCheng Sean Ye #include "gcpu.h"
37*e4b86885SCheng Sean Ye
38*e4b86885SCheng Sean Ye uint_t gcpu_poll_trace_nent = 100;
39*e4b86885SCheng Sean Ye
40*e4b86885SCheng Sean Ye #ifdef DEBUG
41*e4b86885SCheng Sean Ye int gcpu_poll_trace_always = 1;
42*e4b86885SCheng Sean Ye #else
43*e4b86885SCheng Sean Ye int gcpu_poll_trace_always = 0;
44*e4b86885SCheng Sean Ye #endif
45*e4b86885SCheng Sean Ye
46*e4b86885SCheng Sean Ye void
gcpu_poll_trace(gcpu_poll_trace_ctl_t * ptc,uint8_t what,uint8_t nerr)47*e4b86885SCheng Sean Ye gcpu_poll_trace(gcpu_poll_trace_ctl_t *ptc, uint8_t what, uint8_t nerr)
48*e4b86885SCheng Sean Ye {
49*e4b86885SCheng Sean Ye gcpu_poll_trace_t *pt;
50*e4b86885SCheng Sean Ye uint_t next;
51*e4b86885SCheng Sean Ye
52*e4b86885SCheng Sean Ye DTRACE_PROBE2(gcpu__mca__poll__trace, uint32_t, what, uint32_t, nerr);
53*e4b86885SCheng Sean Ye
54*e4b86885SCheng Sean Ye if (ptc->mptc_tbufs == NULL)
55*e4b86885SCheng Sean Ye return; /* poll trace buffer is disabled */
56*e4b86885SCheng Sean Ye
57*e4b86885SCheng Sean Ye next = (ptc->mptc_curtrace + 1) % gcpu_poll_trace_nent;
58*e4b86885SCheng Sean Ye pt = &ptc->mptc_tbufs[next];
59*e4b86885SCheng Sean Ye
60*e4b86885SCheng Sean Ye pt->mpt_when = 0;
61*e4b86885SCheng Sean Ye pt->mpt_what = what;
62*e4b86885SCheng Sean Ye
63*e4b86885SCheng Sean Ye pt->mpt_nerr = MIN(nerr, UINT8_MAX);
64*e4b86885SCheng Sean Ye
65*e4b86885SCheng Sean Ye pt->mpt_when = gethrtime_waitfree();
66*e4b86885SCheng Sean Ye ptc->mptc_curtrace = next;
67*e4b86885SCheng Sean Ye }
68*e4b86885SCheng Sean Ye
69*e4b86885SCheng Sean Ye void
gcpu_poll_trace_init(gcpu_poll_trace_ctl_t * ptc)70*e4b86885SCheng Sean Ye gcpu_poll_trace_init(gcpu_poll_trace_ctl_t *ptc)
71*e4b86885SCheng Sean Ye {
72*e4b86885SCheng Sean Ye gcpu_poll_trace_t *tbufs = NULL;
73*e4b86885SCheng Sean Ye
74*e4b86885SCheng Sean Ye if (gcpu_poll_trace_always) {
75*e4b86885SCheng Sean Ye tbufs = kmem_zalloc(sizeof (gcpu_poll_trace_t) *
76*e4b86885SCheng Sean Ye gcpu_poll_trace_nent, KM_SLEEP);
77*e4b86885SCheng Sean Ye }
78*e4b86885SCheng Sean Ye
79*e4b86885SCheng Sean Ye ptc->mptc_tbufs = tbufs;
80*e4b86885SCheng Sean Ye ptc->mptc_curtrace = 0;
81*e4b86885SCheng Sean Ye }
82