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From: Tim Chen <tim.c.chen@linux.intel.com>
To: rjw@rjwysocki.net, tglx@linutronix.de, mingo@redhat.com, bp@suse.de
Cc: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
	x86@kernel.org, linux-pm@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
	peterz@infradead.org, Tim Chen <tim.c.chen@linux.intel.com>,
	jolsa@redhat.com
Subject: [PATCH v8 6/8] acpi: bus: Enable HWP CPPC objects
Date: Tue, 22 Nov 2016 12:23:58 -0800	[thread overview]
Message-ID: <a696f6b17843cee9a542482fae6abab087be9587.1479844244.git.tim.c.chen@linux.intel.com> (raw)
In-Reply-To: <cover.1479844244.git.tim.c.chen@linux.intel.com>
In-Reply-To: <cover.1479844244.git.tim.c.chen@linux.intel.com>

From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

Need to set platform wide _OSC bits to enable CPPC and CPPC version 2.
If platform supports CPPC, then BIOS exposes CPPC tables.

The primary reason to enable CPPC support is to get the maximum
performance of each CPU to check and enable Intel Turbo Boost Max
Technology 3.0 (ITMT).

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Tim Chen <tim.c.chen@linux.intel.com>
---
 drivers/acpi/bus.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 56190d0..2f381ba 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -331,6 +331,13 @@ static void acpi_bus_osc_support(void)
 	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_HOTPLUG_OST_SUPPORT;
 	capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_PCLPI_SUPPORT;
 
+#ifdef CONFIG_X86
+	if (boot_cpu_has(X86_FEATURE_HWP)) {
+		capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPC_SUPPORT;
+		capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_CPCV2_SUPPORT;
+	}
+#endif
+
 	if (!ghes_disable)
 		capbuf[OSC_SUPPORT_DWORD] |= OSC_SB_APEI_SUPPORT;
 	if (ACPI_FAILURE(acpi_get_handle(NULL, "\\_SB", &handle)))
-- 
2.5.5

  parent reply	other threads:[~2016-11-22 20:25 UTC|newest]

Thread overview: 39+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-22 20:23 [PATCH v8 0/8] Support Intel Turbo Boost Max Technology 3.0 Tim Chen
2016-11-22 20:23 ` [PATCH v8 1/8] sched: Extend scheduler's asym packing Tim Chen
2016-11-23 13:09   ` Peter Zijlstra
2016-11-23 17:32     ` Tim Chen
2016-11-24 13:25   ` [tip:sched/core] " tip-bot for Tim Chen
2016-11-22 20:23 ` [PATCH v8 2/8] x86/topology: Define x86's arch_update_cpu_topology Tim Chen
2016-11-24 19:52   ` [tip:x86/core] " tip-bot for Tim Chen
2016-11-22 20:23 ` [PATCH v8 3/8] x86: Enable Intel Turbo Boost Max Technology 3.0 Tim Chen
2016-11-24 19:52   ` [tip:x86/core] " tip-bot for Tim Chen
2016-11-25  8:19     ` Ingo Molnar
2016-11-25  8:39       ` Peter Zijlstra
2016-11-25 19:06       ` Thomas Gleixner
2016-11-28  8:51         ` Ingo Molnar
2016-11-28 17:35           ` Tim Chen
2016-11-28 23:22             ` Rafael J. Wysocki
2016-11-29  7:11             ` Ingo Molnar
2016-11-29 18:45               ` Tim Chen
2016-11-22 20:23 ` [PATCH v8 4/8] x86/sysctl: Add sysctl for ITMT scheduling feature Tim Chen
2016-11-24 19:53   ` [tip:x86/core] " tip-bot for Tim Chen
2016-11-28  8:56   ` [PATCH v8 4/8] " Borislav Petkov
2016-11-29 17:30     ` Tim Chen
2016-11-29 17:51       ` Borislav Petkov
2016-11-22 20:23 ` [PATCH v8 5/8] x86/sched: Add SD_ASYM_PACKING flags to x86 ITMT CPU Tim Chen
2016-11-24 19:53   ` [tip:x86/core] " tip-bot for Tim Chen
2016-11-22 20:23 ` Tim Chen [this message]
2016-11-24 19:54   ` [tip:x86/core] acpi/bus: Enable HWP CPPC objects tip-bot for Srinivas Pandruvada
2016-11-22 20:23 ` [PATCH v8 7/8] acpi: bus: Set _OSC for diverse core support Tim Chen
2016-11-24 19:54   ` [tip:x86/core] acpi/bus: " tip-bot for Srinivas Pandruvada
2016-11-22 20:24 ` [PATCH v8 8/8] cpufreq: intel_pstate: Use CPPC to get max performance Tim Chen
2016-11-24 19:55   ` [tip:x86/core] cpufreq/intel_pstate: " tip-bot for Rafael J. Wysocki
2016-12-07 19:06   ` [PATCH v8 8/8] cpufreq: intel_pstate: " Sebastian Andrzej Siewior
2016-12-07 23:12     ` Tim Chen
2016-12-07 23:29       ` Rafael J. Wysocki
2016-12-09 14:45         ` Sebastian Andrzej Siewior
2016-12-09 15:02           ` Rafael J. Wysocki
2016-12-09 23:52             ` [PATCH] ACPI / CPPC: Fix per-CPU pointers management Rafael J. Wysocki
2016-12-10 18:51               ` Sebastian Andrzej Siewior
2016-12-12  1:00                 ` Rafael J. Wysocki
2016-12-14  2:26               ` Rafael J. Wysocki

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