This is a note to let you know that I've just added the patch titled
[PATCH 101/135] intel_idle: Support for Intel Xeon Phi Processor x200
to the 4.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
0101-intel_idle-Support-for-Intel-Xeon-Phi-Processor-x200.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bbef1b4a396a050636e87b1f26968982ab73bea1 Mon Sep 17 00:00:00 2001
From: Dasaratharaman Chandramouli <dasaratharaman.chandramouli@xxxxxxxxx>
Date: Thu, 4 Sep 2014 17:22:54 -0700
Subject: [PATCH 101/135] intel_idle: Support for Intel Xeon Phi Processor x200
Product Family
[ Upstream commit 281baf7a702693deaa45c98ef0c5161006b48257 ]
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@xxxxxxxxx>
[micah.barany@xxxxxxxxx: adjusted values of residency and latency]
Signed-off-by: Micah Barany <micah.barany@xxxxxxxxx>
[hubert.chrzaniuk@xxxxxxxxx: removed deprecated CPUIDLE_FLAG_TIME_VALID flag]
Signed-off-by: Hubert Chrzaniuk <hubert.chrzaniuk@xxxxxxxxx>
Signed-off-by: Pawel Karczewski <pawel.karczewski@xxxxxxxxx>
Signed-off-by: Len Brown <len.brown@xxxxxxxxx>
Signed-off-by: Sasha Levin <alexander.levin@xxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/idle/intel_idle.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)
--- 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_av
.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_idl
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);
Patches currently in stable-queue which might be from dasaratharaman.chandramouli@xxxxxxxxx are
queue-4.4/0101-intel_idle-Support-for-Intel-Xeon-Phi-Processor-x200.patch
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