linux-kernel - [PATCH] cpuidle: CPUIDLE_FLAG_TLB_FLUSHED is specific to intel

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Message-id: <alpine.LFD.2.02.1101120301530.19140@x980>
Date:	Wed, 12 Jan 2011 03:02:32 -0500 (EST)
From:	Len Brown <lenb@...nel.org>
To:	Thomas Renninger <trenn@...e.de>
Cc:	linux-perf-users@...r.kernel.org, Ingo Molnar <mingo@...e.hu>,
	arjan@...ux.intel.com, j-pihet@...com, linux-acpi@...r.kernel.org,
	linux-pm@...ts.linux-foundation.org, linux-kernel@...r.kernel.org
Subject: [PATCH] cpuidle: CPUIDLE_FLAG_TLB_FLUSHED is specific to intel_idle

From: Len Brown <len.brown@...el.com>

Signed-off-by: Len Brown <len.brown@...el.com>
---
 drivers/idle/intel_idle.c |    8 ++++++++
 include/linux/cpuidle.h   |    1 -
 2 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/drivers/idle/intel_idle.c b/drivers/idle/intel_idle.c
index 21d3871..8256309 100644
--- a/drivers/idle/intel_idle.c
+++ b/drivers/idle/intel_idle.c
@@ -82,6 +82,14 @@ static int intel_idle(struct cpuidle_device *dev, struct cpuidle_state *state);
 static struct cpuidle_state *cpuidle_state_table;
 
 /*
+ * Set this flag for states where the HW flushes the TLB for us
+ * and so we don't need cross-calls to keep it consistent.
+ * If this flag is set, SW flushes the TLB, so even if the
+ * HW doesn't do the flushing, this flag is safe to use.
+ */
+#define CPUIDLE_FLAG_TLB_FLUSHED	0x10000
+
+/*
  * States are indexed by the cstate number,
  * which is also the index into the MWAIT hint array.
  * Thus C0 is a dummy.
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index c252953..6be722c 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -49,7 +49,6 @@ struct cpuidle_state {
 #define CPUIDLE_FLAG_TIME_VALID	(0x01) /* is residency time measurable? */
 #define CPUIDLE_FLAG_CHECK_BM	(0x02) /* BM activity will exit state */
 #define CPUIDLE_FLAG_IGNORE	(0x100) /* ignore during this idle period */
-#define CPUIDLE_FLAG_TLB_FLUSHED (0x200) /* tlb will be flushed */
 
 #define CPUIDLE_DRIVER_FLAGS_MASK (0xFFFF0000)
 
-- 
1.7.4.rc1.7.g2cf08

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