mirror of https://github.com/djcb/mu.git
201 lines
7.5 KiB
Plaintext
201 lines
7.5 KiB
Plaintext
Return-Path: <owner-tech+M42749@openbsd.org>
|
|
Delivered-To: attila@stalphonsos.com
|
|
Received: (qmail 37697 invoked from network); 28 Jun 2015 22:20:10 -0000
|
|
Received: from unknown (HELO shear.ucar.edu) (192.43.244.163)
|
|
by x.stalphonsos.net with SMTP; 28 Jun 2015 22:20:10 -0000
|
|
Received: from openbsd.org (localhost [127.0.0.1])
|
|
by shear.ucar.edu (8.14.7/8.14.7) with ESMTP id t5SMJRQT000203;
|
|
Sun, 28 Jun 2015 16:19:27 -0600 (MDT)
|
|
Received: from mail-pa0-f51.google.com (mail-pa0-f51.google.com [209.85.220.51])
|
|
by shear.ucar.edu (8.14.7/8.14.7) with ESMTP id t5SMJGwf030092
|
|
(version=TLSv1/SSLv3 cipher=DHE-DSS-AES128-SHA bits=128 verify=FAIL)
|
|
for <tech@openbsd.org>; Sun, 28 Jun 2015 16:19:17 -0600 (MDT)
|
|
Received: by padev16 with SMTP id ev16so94981036pad.0
|
|
for <tech@openbsd.org>; Sun, 28 Jun 2015 15:19:16 -0700 (PDT)
|
|
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
|
|
d=gmail.com; s=20120113;
|
|
h=date:from:to:cc:subject:in-reply-to:message-id:references
|
|
:user-agent:mime-version:content-type;
|
|
bh=4q12s9+CtyHZEDQlC5XvVo3VnQHQCA5Vt6JwqbU9Adc=;
|
|
b=UVS7CgpSvUmIQMP7SOv8c1FO5cj2765fmTE2FwHVGkUahh/tuqT1uQGa7tfG7/1vbL
|
|
y4FPwhokPb+Q8mLKI3qIEfdgmQzhq1QcT6kkvNrRe7UuybMQhDJKwZuPAd7KcaS1kigX
|
|
GMS8P3DxB3PMoNOKoYUomd5X4Xm4MT/68ifl+4g1WiWD5BkLdqG5G8MaFo3B6W0E+h+1
|
|
XNNK2B4BSJF28WswgAXzEshV4Sr/Uju0a5I/1sh3QYkZ3XCZRJeQpd14je0O5Z9ivj3P
|
|
3EW+CQZmiStJ+A9CCsMhGUoMFhJFcbZ6LDd8bJKkcsGPZ85zmFfcUubODSA/lRtkW6Gi
|
|
RtkA==
|
|
X-Received: by 10.70.48.68 with SMTP id j4mr25375231pdn.111.1435529956338;
|
|
Sun, 28 Jun 2015 15:19:16 -0700 (PDT)
|
|
Received: from the-guenther.attlocal.net (76-253-1-113.lightspeed.sntcca.sbcglobal.net. [76.253.1.113])
|
|
by mx.google.com with ESMTPSA id v8sm40045232pdm.89.2015.06.28.15.19.14
|
|
(version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128);
|
|
Sun, 28 Jun 2015 15:19:15 -0700 (PDT)
|
|
Date: Sun, 28 Jun 2015 15:19:13 -0700
|
|
From: Philip Guenther <guenther@gmail.com>
|
|
X-X-Sender: guenther@morgaine.local
|
|
To: Mark Kettenis <mark.kettenis@xs4all.nl>
|
|
cc: tech@openbsd.org
|
|
Subject: Re: C-state FFH on x41
|
|
In-Reply-To: <201506281537.t5SFbZs6031688@glazunov.sibelius.xs4all.nl>
|
|
Message-ID: <alpine.BSO.2.20.1506281513280.27877@morgaine.local>
|
|
References: <201506281537.t5SFbZs6031688@glazunov.sibelius.xs4all.nl>
|
|
User-Agent: Alpine 2.20 (BSO 67 2015-01-07)
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=US-ASCII
|
|
List-Help: <mailto:majordomo@openbsd.org?body=help>
|
|
List-ID: <tech.openbsd.org>
|
|
List-Owner: <mailto:owner-tech@openbsd.org>
|
|
List-Post: <mailto:tech@openbsd.org>
|
|
List-Subscribe: <mailto:majordomo@openbsd.org?body=sub%20tech>
|
|
List-Unsubscribe: <mailto:majordomo@openbsd.org?body=unsub%20tech>
|
|
X-Loop: tech@openbsd.org
|
|
Precedence: list
|
|
Sender: owner-tech@openbsd.org
|
|
|
|
On Sun, 28 Jun 2015, Mark Kettenis wrote:
|
|
> I have an x41 that prints the following in dmesg:
|
|
>
|
|
> acpicpu0 at acpi0
|
|
> C1: unknown FFH vendor 8: !C3(250@85 io@0x1015), C2(500@1 io@0x1014), PSS
|
|
>
|
|
> The relevant AML indead has that strange value in the "Bit Width" field:
|
|
...
|
|
> Obviously this ACPI BIOS is buggy and perhaps we should indeed
|
|
> complain. But we also should include a C1 HALT state in the list
|
|
> regardless, and I don't think we currently do that.
|
|
|
|
Give the diff below a try. It inserts a fallback "C1-via-halt" state
|
|
before parsing the _CST objects, overwriting it if a valid _CST C1 state
|
|
is found. If no valid _CST C1 was found, the fallback should show in
|
|
dmesg as "C1(@1 halt!)".
|
|
|
|
As a side-benefit, this renders a couple paranoia checks obsolete in
|
|
acpicpu_idle().
|
|
|
|
|
|
Index: dev/acpi/acpicpu.c
|
|
===================================================================
|
|
RCS file: /data/src/openbsd/src/sys/dev/acpi/acpicpu.c,v
|
|
retrieving revision 1.64
|
|
diff -u -p -r1.64 acpicpu.c
|
|
--- dev/acpi/acpicpu.c 13 Jun 2015 21:41:42 -0000 1.64
|
|
+++ dev/acpi/acpicpu.c 28 Jun 2015 21:55:51 -0000
|
|
@@ -77,7 +77,7 @@ void acpicpu_setperf_ppc_change(struct a
|
|
/* flags on Intel's FFH mwait method */
|
|
#define CST_FLAG_MWAIT_HW_COORD 0x1
|
|
#define CST_FLAG_MWAIT_BM_AVOIDANCE 0x2
|
|
-#define CST_FLAG_UP_ONLY 0x4000 /* ignore if MP */
|
|
+#define CST_FLAG_FALLBACK 0x4000 /* fallback for broken _CST */
|
|
#define CST_FLAG_SKIP 0x8000 /* state is worse choice */
|
|
|
|
#define FLAGS_MWAIT_ONLY 0x02
|
|
@@ -339,7 +339,13 @@ acpicpu_add_cstate(struct acpicpu_softc
|
|
dnprintf(10," C%d: latency:.%4x power:%.4x addr:%.16llx\n",
|
|
state, latency, power, address);
|
|
|
|
- cx = malloc(sizeof(*cx), M_DEVBUF, M_WAITOK);
|
|
+ /* add a new state, or overwrite the fallback C1 state? */
|
|
+ if (state != ACPI_STATE_C1 ||
|
|
+ (cx = SLIST_FIRST(&sc->sc_cstates)) == NULL ||
|
|
+ (cx->flags & CST_FLAG_FALLBACK) == 0) {
|
|
+ cx = malloc(sizeof(*cx), M_DEVBUF, M_WAITOK);
|
|
+ SLIST_INSERT_HEAD(&sc->sc_cstates, cx, link);
|
|
+ }
|
|
|
|
cx->state = state;
|
|
cx->method = method;
|
|
@@ -347,8 +353,6 @@ acpicpu_add_cstate(struct acpicpu_softc
|
|
cx->latency = latency;
|
|
cx->power = power;
|
|
cx->address = address;
|
|
-
|
|
- SLIST_INSERT_HEAD(&sc->sc_cstates, cx, link);
|
|
}
|
|
|
|
/* Found a _CST object, add new cstate for each entry */
|
|
@@ -489,9 +493,18 @@ acpicpu_getcst(struct acpicpu_softc *sc)
|
|
if (aml_evalname(sc->sc_acpi, sc->sc_devnode, "_CST", 0, NULL, &res))
|
|
return (1);
|
|
|
|
+ /* provide a fallback C1-via-halt in case _CST's C1 is bogus */
|
|
+ acpicpu_add_cstate(sc, ACPI_STATE_C1, CST_METH_HALT,
|
|
+ CST_FLAG_FALLBACK, 1, -1, 0);
|
|
+
|
|
aml_foreachpkg(&res, 1, acpicpu_add_cstatepkg, sc);
|
|
aml_freevalue(&res);
|
|
|
|
+ /* only have fallback state? then no _CST objects were understood */
|
|
+ cx = SLIST_FIRST(&sc->sc_cstates);
|
|
+ if (cx->flags & CST_FLAG_FALLBACK)
|
|
+ return (1);
|
|
+
|
|
/*
|
|
* Scan the list for states that are neither lower power nor
|
|
* lower latency than the next state; mark them to be skipped.
|
|
@@ -500,19 +513,15 @@ acpicpu_getcst(struct acpicpu_softc *sc)
|
|
* Also keep track if all the states we'll use use mwait.
|
|
*/
|
|
use_nonmwait = 0;
|
|
- if ((cx = SLIST_FIRST(&sc->sc_cstates)) == NULL)
|
|
- use_nonmwait = 1;
|
|
- else {
|
|
- while ((next_cx = SLIST_NEXT(cx, link)) != NULL) {
|
|
- if ((cx->power >= next_cx->power &&
|
|
- cx->latency >= next_cx->latency) ||
|
|
- (cx->state > 1 &&
|
|
- (sc->sc_ci->ci_feature_tpmflags & TPM_ARAT) == 0))
|
|
- cx->flags |= CST_FLAG_SKIP;
|
|
- else if (cx->method != CST_METH_MWAIT)
|
|
- use_nonmwait = 1;
|
|
- cx = next_cx;
|
|
- }
|
|
+ while ((next_cx = SLIST_NEXT(cx, link)) != NULL) {
|
|
+ if ((cx->power >= next_cx->power &&
|
|
+ cx->latency >= next_cx->latency) ||
|
|
+ (cx->state > 1 &&
|
|
+ (sc->sc_ci->ci_feature_tpmflags & TPM_ARAT) == 0))
|
|
+ cx->flags |= CST_FLAG_SKIP;
|
|
+ else if (cx->method != CST_METH_MWAIT)
|
|
+ use_nonmwait = 1;
|
|
+ cx = next_cx;
|
|
}
|
|
if (use_nonmwait)
|
|
sc->sc_flags &= ~FLAGS_MWAIT_ONLY;
|
|
@@ -581,8 +590,12 @@ acpicpu_print_one_cst(struct acpi_cstate
|
|
if (cx->power != -1)
|
|
printf("%d", cx->power);
|
|
printf("@%d%s", cx->latency, meth);
|
|
- if (cx->flags & ~CST_FLAG_SKIP)
|
|
- printf(".%x", (cx->flags & ~CST_FLAG_SKIP));
|
|
+ if (cx->flags & ~CST_FLAG_SKIP) {
|
|
+ if (cx->flags & CST_FLAG_FALLBACK)
|
|
+ printf("!");
|
|
+ else
|
|
+ printf(".%x", (cx->flags & ~CST_FLAG_SKIP));
|
|
+ }
|
|
if (show_addr)
|
|
printf("@0x%llx", cx->address);
|
|
printf(")");
|
|
@@ -1114,12 +1127,6 @@ acpicpu_idle(void)
|
|
* states marked skippable
|
|
*/
|
|
best = cx = SLIST_FIRST(&sc->sc_cstates);
|
|
- if (cx == NULL) {
|
|
-halt:
|
|
- __asm volatile("sti; hlt");
|
|
- return;
|
|
- }
|
|
-
|
|
while ((cx->flags & CST_FLAG_SKIP) ||
|
|
cx->latency * 3 > sc->sc_prev_sleep) {
|
|
if ((cx = SLIST_NEXT(cx, link)) == NULL)
|
|
@@ -1140,8 +1147,6 @@ halt:
|
|
(cx->flags & CST_FLAG_MWAIT_BM_AVOIDANCE) == 0)
|
|
break;
|
|
}
|
|
- if (cx == NULL)
|
|
- goto halt;
|
|
best = cx;
|
|
}
|
|
|
|
|