Module Name: src Committed By: jruoho Date: Sat Aug 21 04:36:29 UTC 2010
Modified Files: src/sys/arch/x86/acpi: acpi_cpu_md.c Log Message: Detect Intel's Turbo Boost and presence of IA32_APERF/IA32_MPERF. The former is required for a quirk, and the latter is needed for hardware P-state coordination (once acpicpu(4) will support fine-grained coordination). To generate a diff of this commit: cvs rdiff -u -r1.22 -r1.23 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:1.22 src/sys/arch/x86/acpi/acpi_cpu_md.c:1.23 --- src/sys/arch/x86/acpi/acpi_cpu_md.c:1.22 Sat Aug 21 03:55:24 2010 +++ src/sys/arch/x86/acpi/acpi_cpu_md.c Sat Aug 21 04:36:29 2010 @@ -1,4 +1,4 @@ -/* $NetBSD: acpi_cpu_md.c,v 1.22 2010/08/21 03:55:24 jruoho Exp $ */ +/* $NetBSD: acpi_cpu_md.c,v 1.23 2010/08/21 04:36:29 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 1.22 2010/08/21 03:55:24 jruoho Exp $"); +__KERNEL_RCSID(0, "$NetBSD: acpi_cpu_md.c,v 1.23 2010/08/21 04:36:29 jruoho Exp $"); #include <sys/param.h> #include <sys/bus.h> @@ -146,6 +146,21 @@ val |= ACPICPU_FLAG_T_FFH; /* + * See if MSR_APERF, MSR_MPERF, + * and Turbo Boost are available. + */ + if (cpuid_level >= 0x06) { + + x86_cpuid(0x06, regs); + + if ((regs[2] & __BIT(0)) != 0) /* ECX.06[0] */ + val |= ACPICPU_FLAG_P_HW; + + if ((regs[0] & __BIT(1)) != 0) + val |= ACPICPU_FLAG_P_TURBO; /* EAX.06[1] */ + } + + /* * Detect whether TSC is invariant. If it is not, * we keep the flag to note that TSC will not run * at constant rate. Depending on the CPU, this may