Module Name: src
Committed By: jruoho
Date: Sat Aug 21 18:25:45 UTC 2010
Modified Files:
src/sys/arch/x86/acpi: acpi_cpu_md.c
src/sys/dev/acpi: acpi_cpu_tstate.c
Log Message:
After discussion with jakllsch@ and jmcneill@, revert the previous and only
do the status-check when the comparison value reported by BIOS is not zero.
The uncertainty noted in the previous commit still applies. But if we ever
see a timeout again, it will likely be either a firmware bug or a special
case like the Intel Turbo Boost.
To generate a diff of this commit:
cvs rdiff -u -r1.28 -r1.29 src/sys/arch/x86/acpi/acpi_cpu_md.c
cvs rdiff -u -r1.15 -r1.16 src/sys/dev/acpi/acpi_cpu_tstate.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
Modified files:
Index: src/sys/arch/x86/acpi/acpi_cpu_md.c
diff -u src/sys/arch/x86/acpi/acpi_cpu_md.c:1.28 src/sys/arch/x86/acpi/acpi_cpu_md.c:1.29
--- src/sys/arch/x86/acpi/acpi_cpu_md.c:1.28 Sat Aug 21 15:37:35 2010
+++ src/sys/arch/x86/acpi/acpi_cpu_md.c Sat Aug 21 18:25:45 2010
@@ -1,4 +1,4 @@
-/* $NetBSD: acpi_cpu_md.c,v 1.28 2010/08/21 15:37:35 jruoho Exp $ */
+/* $NetBSD: acpi_cpu_md.c,v 1.29 2010/08/21 18:25:45 jruoho Exp $ */
/*-
* Copyright (c) 2010 Jukka Ruohonen <[email protected]>
@@ -27,7 +27,7 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.28 2010/08/21 15:37:35 jruoho Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.29 2010/08/21 18:25:45 jruoho Exp $");
#include <sys/param.h>
#include <sys/bus.h>
@@ -481,7 +481,7 @@
if (ps->ps_freq == 0)
continue;
- if (val == ps->ps_status || val == ps->ps_control) {
+ if (val == ps->ps_status) {
*freq = ps->ps_freq;
return 0;
}
@@ -509,6 +509,9 @@
xc = xc_broadcast(0, (xcfunc_t)x86_msr_xcall, &msr, NULL);
xc_wait(xc);
+ if (__predict_false(ps->ps_status == 0))
+ return 0;
+
if (__predict_false(ps->ps_status_addr == 0))
return 0;
@@ -535,7 +538,7 @@
if (__predict_true(ps->ps_status_mask != 0))
val = val & ps->ps_status_mask;
- if (val == ps->ps_status || val == ps->ps_control)
+ if (val == ps->ps_status)
return;
DELAY(ps->ps_latency);
@@ -560,7 +563,7 @@
if (ts->ts_percent == 0)
continue;
- if (val == ts->ts_status || val == ts->ts_control) {
+ if (val == ts->ts_status) {
*percent = ts->ts_percent;
return 0;
}
@@ -604,7 +607,7 @@
val = rdmsr(MSR_THERM_CONTROL);
- if (val == ts->ts_status || val == ts->ts_control)
+ if (val == ts->ts_status)
return;
DELAY(ts->ts_latency);
Index: src/sys/dev/acpi/acpi_cpu_tstate.c
diff -u src/sys/dev/acpi/acpi_cpu_tstate.c:1.15 src/sys/dev/acpi/acpi_cpu_tstate.c:1.16
--- src/sys/dev/acpi/acpi_cpu_tstate.c:1.15 Fri Aug 20 04:16:00 2010
+++ src/sys/dev/acpi/acpi_cpu_tstate.c Sat Aug 21 18:25:45 2010
@@ -1,4 +1,4 @@
-/* $NetBSD: acpi_cpu_tstate.c,v 1.15 2010/08/20 04:16:00 jruoho Exp $ */
+/* $NetBSD: acpi_cpu_tstate.c,v 1.16 2010/08/21 18:25:45 jruoho Exp $ */
/*-
* Copyright (c) 2010 Jukka Ruohonen <[email protected]>
@@ -27,7 +27,7 @@
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_tstate.c,v 1.15 2010/08/20 04:16:00 jruoho Exp $");
+__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_tstate.c,v 1.16 2010/08/21 18:25:45 jruoho Exp $");
#include <sys/param.h>
#include <sys/evcnt.h>
@@ -683,15 +683,6 @@
if (sc->sc_tstate[i].ts_percent == 0)
continue;
- /*
- * As the status field may be zero, compare
- * against the control field value as well.
- */
- if (val == sc->sc_tstate[i].ts_control) {
- ts = &sc->sc_tstate[i];
- break;
- }
-
if (val == sc->sc_tstate[i].ts_status) {
ts = &sc->sc_tstate[i];
break;
