Commit-ID: 01fe03ff1c7ce6b6e2212cb6171a49c2858fbc7c Gitweb: http://git.kernel.org/tip/01fe03ff1c7ce6b6e2212cb6171a49c2858fbc7c Author: Huang Rui <[email protected]> AuthorDate: Thu, 14 Jan 2016 10:50:06 +0800 Committer: Ingo Molnar <[email protected]> CommitDate: Mon, 21 Mar 2016 09:35:29 +0100
x86/cpufeature, perf/x86: Add AMD Accumulated Power Mechanism feature flag AMD CPU family 15h model 0x60 introduces a mechanism for measuring accumulated power. It is used to report the processor power consumption and support for it is indicated by CPUID Fn8000_0007_EDX[12]. Signed-off-by: Huang Rui <[email protected]> Signed-off-by: Borislav Petkov <[email protected]> Cc: Aaron Lu <[email protected]> Cc: Alexander Shishkin <[email protected]> Cc: Andreas Herrmann <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Andy Lutomirski <[email protected]> Cc: Aravind Gopalakrishnan <[email protected]> Cc: Arnaldo Carvalho de Melo <[email protected]> Cc: Borislav Petkov <[email protected]> Cc: Brian Gerst <[email protected]> Cc: David Ahern <[email protected]> Cc: Denys Vlasenko <[email protected]> Cc: Fengguang Wu <[email protected]> Cc: Frédéric Weisbecker <[email protected]> Cc: Guenter Roeck <[email protected]> Cc: H. Peter Anvin <[email protected]> Cc: Hector Marco-Gisbert <[email protected]> Cc: Jacob Shin <[email protected]> Cc: Jiri Olsa <[email protected]> Cc: John Stultz <[email protected]> Cc: Kristen Carlson Accardi <[email protected]> Cc: Linus Torvalds <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Robert Richter <[email protected]> Cc: Ross Zwisler <[email protected]> Cc: Stephane Eranian <[email protected]> Cc: Suravee Suthikulpanit <[email protected]> Cc: Thomas Gleixner <[email protected]> Cc: Vince Weaver <[email protected]> Cc: Wan Zongshun <[email protected]> Cc: [email protected] Link: http://lkml.kernel.org/r/[email protected] [ Resolved conflict and moved the synthetic CPUID slot to 19. ] Signed-off-by: Ingo Molnar <[email protected]> --- arch/x86/include/asm/cpufeatures.h | 2 +- arch/x86/kernel/cpu/amd.c | 4 ++++ 2 files changed, 5 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h index 746dd6a..44ebd04 100644 --- a/arch/x86/include/asm/cpufeatures.h +++ b/arch/x86/include/asm/cpufeatures.h @@ -94,7 +94,7 @@ #define X86_FEATURE_REP_GOOD ( 3*32+16) /* rep microcode works well */ #define X86_FEATURE_MFENCE_RDTSC ( 3*32+17) /* "" Mfence synchronizes RDTSC */ #define X86_FEATURE_LFENCE_RDTSC ( 3*32+18) /* "" Lfence synchronizes RDTSC */ -/* free, was #define X86_FEATURE_11AP ( 3*32+19) * "" Bad local APIC aka 11AP */ +#define X86_FEATURE_ACC_POWER ( 3*32+19) /* AMD Accumulated Power Mechanism */ #define X86_FEATURE_NOPL ( 3*32+20) /* The NOPL (0F 1F) instructions */ #define X86_FEATURE_ALWAYS ( 3*32+21) /* "" Always-present feature */ #define X86_FEATURE_XTOPOLOGY ( 3*32+22) /* cpu topology enum extensions */ diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index d4b06e8..68fe8d3 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -546,6 +546,10 @@ static void early_init_amd(struct cpuinfo_x86 *c) set_sched_clock_stable(); } + /* Bit 12 of 8000_0007 edx is accumulated power mechanism. */ + if (c->x86_power & BIT(12)) + set_cpu_cap(c, X86_FEATURE_ACC_POWER); + #ifdef CONFIG_X86_64 set_cpu_cap(c, X86_FEATURE_SYSCALL32); #else
