svn commit: r212549 - head/sys/dev/acpica
Norikatsu Shigemura
nork at FreeBSD.org
Mon Sep 13 14:11:29 UTC 2010
Hi avg!
On Mon, 13 Sep 2010 09:51:24 +0000 (UTC)
Andriy Gapon <avg at FreeBSD.org> wrote:
> Author: avg
> Date: Mon Sep 13 09:51:24 2010
> New Revision: 212549
> URL: http://svn.freebsd.org/changeset/base/212549
> Log:
> acpi_cpu: do not apply P_LVLx_LAT rules to latencies returned by _CST
> ACPI specification sates that if P_LVL2_LAT > 100, then a system doesn't
> support C2; if P_LVL3_LAT > 1000, then C3 is not supported.
> But there are no such rules for Cx state data returned by _CST. If a
> state is not supported it should not be included into the return
> package. In other words, any latency value returned by _CST is valid,
> it's up to the OS and/or user to decide whether to use it.
> Submitted by: nork
> Suggested by: mav
> MFC after: 1 week
Thank you!
> Modified:
> head/sys/dev/acpica/acpi_cpu.c
>
> Modified: head/sys/dev/acpica/acpi_cpu.c
> ==============================================================================
> --- head/sys/dev/acpica/acpi_cpu.c Mon Sep 13 09:23:38 2010 (r212548)
> +++ head/sys/dev/acpica/acpi_cpu.c Mon Sep 13 09:51:24 2010 (r212549)
> @@ -690,19 +690,11 @@ acpi_cpu_cx_cst(struct acpi_cpu_softc *s
> sc->cpu_cx_count++;
> continue;
> case ACPI_STATE_C2:
> - if (cx_ptr->trans_lat > 100) {
> - ACPI_DEBUG_PRINT((ACPI_DB_INFO,
> - "acpi_cpu%d: C2[%d] not available.\n",
> - device_get_unit(sc->cpu_dev), i));
> - continue;
> - }
> sc->cpu_non_c3 = i;
> break;
> case ACPI_STATE_C3:
> default:
> - if (cx_ptr->trans_lat > 1000 ||
> - (cpu_quirks & CPU_QUIRK_NO_C3) != 0) {
> -
> + if ((cpu_quirks & CPU_QUIRK_NO_C3) != 0) {
> ACPI_DEBUG_PRINT((ACPI_DB_INFO,
> "acpi_cpu%d: C3[%d] not available.\n",
> device_get_unit(sc->cpu_dev), i));
--
Norikatsu Shigemura <nork at FreeBSD.org>
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