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Wysocki" , Len Brown , John Stultz , =?UTF-8?q?Fr=C3=A9d=C3=A9ric=20Weisbecker?= CC: , , , Andreas Herrmann , Aravind Gopalakrishnan , Borislav Petkov , Fengguang Wu , Aaron Lu , Tony Li , Huang Rui Subject: [PATCH 11/15] hwmon, fam15h_power: add ptsc counter value for accumulated power Date: Thu, 27 Aug 2015 16:07:42 +0800 Message-ID: <1440662866-28716-12-git-send-email-ray.huang@amd.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1440662866-28716-1-git-send-email-ray.huang@amd.com> References: <1440662866-28716-1-git-send-email-ray.huang@amd.com> MIME-Version: 1.0 Content-Type: text/plain X-EOPAttributedMessage: 0 X-Forefront-Antispam-Report: CIP:165.204.84.222;CTRY:US;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10009020)(6009001)(2980300002)(428002)(3050300001)(189002)(199003)(53416004)(48376002)(77096005)(5003940100001)(87936001)(50226001)(77156002)(47776003)(105586002)(229853001)(106466001)(64706001)(46102003)(76176999)(86362001)(19580405001)(5007970100001)(50986999)(97736004)(5001830100001)(4001540100001)(2950100001)(36756003)(19580395003)(62966003)(5001770100001)(5003600100002)(189998001)(68736005)(33646002)(101416001)(5001860100001)(92566002)(50466002)(921003)(1121003);DIR:OUT;SFP:1101;SCL:1;SRVR:DM3PR12MB0858;H:atltwp02.amd.com;FPR:;SPF:None;PTR:InfoDomainNonexistent;MX:1;A:1;LANG:en; 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So it picks up the performance timestamp counter value of the first core per compute unit to measure the interval for average power per compute unit. Signed-off-by: Huang Rui --- arch/x86/include/asm/msr-index.h | 1 + drivers/hwmon/fam15h_power.c | 9 +++++++++ 2 files changed, 10 insertions(+) diff --git a/arch/x86/include/asm/msr-index.h b/arch/x86/include/asm/msr-index.h index 9ebc3d0..5566360 100644 --- a/arch/x86/include/asm/msr-index.h +++ b/arch/x86/include/asm/msr-index.h @@ -293,6 +293,7 @@ #define MSR_F15H_PERF_CTR 0xc0010201 #define MSR_F15H_NB_PERF_CTL 0xc0010240 #define MSR_F15H_NB_PERF_CTR 0xc0010241 +#define MSR_F15H_PTSC 0xc0010280 /* Fam 10h MSRs */ #define MSR_FAM10H_MMIO_CONF_BASE 0xc0010058 diff --git a/drivers/hwmon/fam15h_power.c b/drivers/hwmon/fam15h_power.c index f5ff48f..d529e4b 100644 --- a/drivers/hwmon/fam15h_power.c +++ b/drivers/hwmon/fam15h_power.c @@ -58,6 +58,8 @@ struct fam15h_power_data { u64 max_cu_acc_power; /* accumulated power of the compute units */ u64 cu_acc_power[MAX_CUS]; + /* performance timestamp counter */ + u64 cpu_sw_pwr_ptsc[MAX_CUS]; }; static ssize_t show_power(struct device *dev, @@ -267,6 +269,13 @@ static int fam15h_power_init_data(struct pci_dev *f4, cpu); return -ENODEV; } + + if (rdmsrl_safe_on_cpu(cpu, MSR_F15H_PTSC, + &data->cpu_sw_pwr_ptsc[cu])) { + pr_err("Failed to read performance timestamp counter MSR on core%d\n", + cpu); + return -ENODEV; + } } return 0; -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/