linux-kernel - [PATCH 2/2] intel_idle: Support for Intel Xeon Phi Processor x200 Product Family

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-Id: <281baf7a702693deaa45c98ef0c5161006b48257.1458796304.git.len.brown@intel.com>
Date:	Thu, 24 Mar 2016 01:16:02 -0400
From:	Len Brown <lenb@...nel.org>
To:	linux-pm@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org,
	Dasaratharaman Chandramouli 
	<dasaratharaman.chandramouli@...el.com>,
	Micah Barany <micah.barany@...el.com>,
	Hubert Chrzaniuk <hubert.chrzaniuk@...el.com>,
	Pawel Karczewski <pawel.karczewski@...el.com>,
	Len Brown <len.brown@...el.com>
Subject: [PATCH 2/2] intel_idle: Support for Intel Xeon Phi Processor x200 Product Family

From: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@...el.com>

Enables "Intel(R) Xeon Phi(TM) Processor x200 Product Family" support,
formerly code-named KNL. It is based on modified Intel Atom Silvermont
microarchitecture.

Signed-off-by: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@...el.com>
[micah.barany@...el.com: adjusted values of residency and latency]
Signed-off-by: Micah Barany <micah.barany@...el.com>
[hubert.chrzaniuk@...el.com: removed deprecated CPUIDLE_FLAG_TIME_VALID flag]
Signed-off-by: Hubert Chrzaniuk <hubert.chrzaniuk@...el.com>
Signed-off-by: Pawel Karczewski <pawel.karczewski@...el.com>
Signed-off-by: Len Brown <len.brown@...el.com>
---
 drivers/idle/intel_idle.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 146eed70b..ba947df 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -716,6 +716,26 @@ static struct cpuidle_state avn_cstates[] = {
 	{
 		.enter = NULL }
 };
+static struct cpuidle_state knl_cstates[] = {
+	{
+		.name = "C1-KNL",
+		.desc = "MWAIT 0x00",
+		.flags = MWAIT2flg(0x00),
+		.exit_latency = 1,
+		.target_residency = 2,
+		.enter = &intel_idle,
+		.enter_freeze = intel_idle_freeze },
+	{
+		.name = "C6-KNL",
+		.desc = "MWAIT 0x10",
+		.flags = MWAIT2flg(0x10) | CPUIDLE_FLAG_TLB_FLUSHED,
+		.exit_latency = 120,
+		.target_residency = 500,
+		.enter = &intel_idle,
+		.enter_freeze = intel_idle_freeze },
+	{
+		.enter = NULL }
+};
 
 /**
  * intel_idle
@@ -890,6 +910,10 @@ static const struct idle_cpu idle_cpu_avn = {
 	.disable_promotion_to_c1e = true,
 };
 
+static const struct idle_cpu idle_cpu_knl = {
+	.state_table = knl_cstates,
+};
+
 #define ICPU(model, cpu) \
 	{ X86_VENDOR_INTEL, 6, model, X86_FEATURE_MWAIT, (unsigned long)&cpu }
 
@@ -921,6 +945,7 @@ static const struct x86_cpu_id intel_idle_ids[] __initconst = {
 	ICPU(0x56, idle_cpu_bdw),
 	ICPU(0x4e, idle_cpu_skl),
 	ICPU(0x5e, idle_cpu_skl),
+	ICPU(0x57, idle_cpu_knl),
 	{}
 };
 MODULE_DEVICE_TABLE(x86cpu, intel_idle_ids);
-- 
2.7.1.339.g0233b80