From: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
To: rjw@rjwysocki.net, tglx@linutronix.de, mingo@redhat.com, bp@suse.de
Cc: x86@kernel.org, linux-pm@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
peterz@infradead.org, tim.c.chen@linux.intel.com,
jolsa@redhat.com,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Subject: [PATCH v4 08/10] acpi: bus: Enable HWP CPPC objects
Date: Wed, 21 Sep 2016 12:19:10 -0700 [thread overview]
Message-ID: <1474485552-141429-9-git-send-email-srinivas.pandruvada@linux.intel.com> (raw)
In-Reply-To: <1474485552-141429-1-git-send-email-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>
---
drivers/acpi/bus.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c
index 85b7d07..61643a5 100644
--- a/drivers/acpi/bus.c
+++ b/drivers/acpi/bus.c
@@ -330,6 +330,13 @@ 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)))
--
2.7.4
next prev parent reply other threads:[~2016-09-21 19:20 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-21 19:19 [PATCH v4 00/10] Support Intel® Turbo Boost Max Technology 3.0 Srinivas Pandruvada
2016-09-21 19:19 ` [PATCH v4 01/10] x86/topology: Fix numa in package topology bug Srinivas Pandruvada
2016-09-30 11:55 ` [tip:sched/core] sched/core, x86/topology: Fix NUMA " tip-bot for Tim Chen
2016-09-21 19:19 ` [PATCH v4 02/10] sched: Extend scheduler's asym packing Srinivas Pandruvada
2016-09-21 19:19 ` [PATCH v4 03/10] x86/topology: Provide topology_num_packages() Srinivas Pandruvada
2016-09-21 19:19 ` [PATCH v4 04/10] x86/topology: Define x86's arch_update_cpu_topology Srinivas Pandruvada
2016-09-21 19:19 ` [PATCH v4 05/10] x86: Enable Intel Turbo Boost Max Technology 3.0 Srinivas Pandruvada
2016-09-21 19:19 ` [PATCH v4 06/10] x86/sysctl: Add sysctl for ITMT scheduling feature Srinivas Pandruvada
2016-09-21 19:19 ` [PATCH v4 07/10] x86/sched: Add SD_ASYM_PACKING flags to x86 ITMT CPU Srinivas Pandruvada
2016-09-21 19:58 ` kbuild test robot
2016-09-21 20:27 ` kbuild test robot
2016-09-21 20:33 ` Rafael J. Wysocki
2016-09-22 19:40 ` Tim Chen
2016-09-21 19:19 ` Srinivas Pandruvada [this message]
2016-09-21 19:19 ` [PATCH v4 09/10] acpi: bus: Set _OSC for diverse core support Srinivas Pandruvada
2016-09-21 19:19 ` [PATCH v4 10/10] cpufreq: intel_pstate: Use CPPC to get max performance Srinivas Pandruvada
2016-09-21 20:30 ` Rafael J. Wysocki
2016-09-22 18:50 ` Tim Chen
2016-09-22 18:56 ` Thomas Gleixner
2016-09-22 19:01 ` Tim Chen
2016-09-22 20:58 ` Rafael J. Wysocki
2016-09-22 21:41 ` Tim Chen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1474485552-141429-9-git-send-email-srinivas.pandruvada@linux.intel.com \
--to=srinivas.pandruvada@linux.intel.com \
--cc=bp@suse.de \
--cc=jolsa@redhat.com \
--cc=linux-acpi@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-pm@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=peterz@infradead.org \
--cc=rjw@rjwysocki.net \
--cc=tglx@linutronix.de \
--cc=tim.c.chen@linux.intel.com \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox
all inboxes | Powered by JetHome®