Module Name: src Committed By: jruoho Date: Fri Aug 20 07:00:17 UTC 2010
Modified Files: src/sys/arch/x86/acpi: acpi_cpu_md.c Log Message: Check if SpeedStep is enabled. If it is disabled, try to enable it. To generate a diff of this commit: cvs rdiff -u -r1.19 -r1.20 src/sys/arch/x86/acpi/acpi_cpu_md.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:1.19 src/sys/arch/x86/acpi/acpi_cpu_md.c:1.20 --- src/sys/arch/x86/acpi/acpi_cpu_md.c:1.19 Fri Aug 20 06:34:32 2010 +++ src/sys/arch/x86/acpi/acpi_cpu_md.c Fri Aug 20 07:00:17 2010 @@ -1,4 +1,4 @@ -/* $NetBSD: acpi_cpu_md.c,v 1.19 2010/08/20 06:34:32 jruoho Exp $ */ +/* $NetBSD: acpi_cpu_md.c,v 1.20 2010/08/20 07:00:17 jruoho Exp $ */ /*- * Copyright (c) 2010 Jukka Ruohonen <jruoho...@iki.fi> @@ -27,7 +27,7 @@ * SUCH DAMAGE. */ #include <sys/cdefs.h> -__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.19 2010/08/20 06:34:32 jruoho Exp $"); +__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.20 2010/08/20 07:00:17 jruoho Exp $"); #include <sys/param.h> #include <sys/bus.h> @@ -254,6 +254,27 @@ int acpicpu_md_pstate_start(void) { + const uint64_t est = __BIT(16); + uint64_t val; + + switch (cpu_vendor) { + + case CPUVENDOR_IDT: + case CPUVENDOR_INTEL: + + val = rdmsr(MSR_MISC_ENABLE); + + if ((val & est) == 0) { + + val |= est; + + wrmsr(MSR_MISC_ENABLE, val); + val = rdmsr(MSR_MISC_ENABLE); + + if ((val & est) == 0) + return ENOTTY; + } + } return acpicpu_md_pstate_sysctl_init(); }