linux-kernel - [RFC 1/4]x86: cleanup vector usage

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Message-ID: <1288766658.23014.114.camel@sli10-conroe>
Date:	Wed, 03 Nov 2010 14:44:18 +0800
From:	Shaohua Li <shaohua.li@...el.com>
To:	lkml <linux-kernel@...r.kernel.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Andi Kleen <andi@...stfloor.org>,
	"hpa@...or.com" <hpa@...or.com>
Subject: [RFC 1/4]x86: cleanup vector usage

Cleanup the vector usage and make them continuous if possible.

Signed-off-by: Shaohua Li <shaohua.li@...el.com>
---
 arch/x86/include/asm/irq_vectors.h |   40 +++++++++++++++++++------------------
 1 file changed, 21 insertions(+), 19 deletions(-)

Index: linux/arch/x86/include/asm/irq_vectors.h
===================================================================
--- linux.orig/arch/x86/include/asm/irq_vectors.h	2010-11-02 10:31:51.000000000 +0800
+++ linux/arch/x86/include/asm/irq_vectors.h	2010-11-02 14:41:01.000000000 +0800
@@ -1,6 +1,7 @@
 #ifndef _ASM_X86_IRQ_VECTORS_H
 #define _ASM_X86_IRQ_VECTORS_H
 
+#include <linux/threads.h>
 /*
  * Linux IRQ vector layout.
  *
@@ -16,8 +17,8 @@
  *  Vectors   0 ...  31 : system traps and exceptions - hardcoded events
  *  Vectors  32 ... 127 : device interrupts
  *  Vector  128         : legacy int80 syscall interface
- *  Vectors 129 ... 237 : device interrupts
- *  Vectors 238 ... 255 : special interrupts
+ *  Vectors 129 ... 229 : device interrupts
+ *  Vectors 230 ... 255 : special interrupts
  *
  * 64-bit x86 has per CPU IDT tables, 32-bit has one shared IDT table.
  *
@@ -96,37 +97,38 @@
 #define THRESHOLD_APIC_VECTOR		0xf9
 #define REBOOT_VECTOR			0xf8
 
-/* f0-f7 used for spreading out TLB flushes: */
-#define INVALIDATE_TLB_VECTOR_END	0xf7
-#define INVALIDATE_TLB_VECTOR_START	0xf0
-#define NUM_INVALIDATE_TLB_VECTORS	   8
-
-/*
- * Local APIC timer IRQ vector is on a different priority level,
- * to work around the 'lost local interrupt if more than 2 IRQ
- * sources per level' errata.
- */
-#define LOCAL_TIMER_VECTOR		0xef
-
 /*
  * Generic system vector for platform specific use
  */
-#define X86_PLATFORM_IPI_VECTOR		0xed
+#define X86_PLATFORM_IPI_VECTOR		0xf7
 
 /*
  * IRQ work vector:
  */
-#define IRQ_WORK_VECTOR			0xec
+#define IRQ_WORK_VECTOR			0xf6
 
-#define UV_BAU_MESSAGE			0xea
+#define UV_BAU_MESSAGE			0xf5
 
 /*
  * Self IPI vector for machine checks
  */
-#define MCE_SELF_VECTOR			0xeb
+#define MCE_SELF_VECTOR			0xf4
 
 /* Xen vector callback to receive events in a HVM domain */
-#define XEN_HVM_EVTCHN_CALLBACK		0xe9
+#define XEN_HVM_EVTCHN_CALLBACK		0xf3
+
+/*
+ * Local APIC timer IRQ vector is on a different priority level,
+ * to work around the 'lost local interrupt if more than 2 IRQ
+ * sources per level' errata.
+ */
+#define LOCAL_TIMER_VECTOR		0xef
+
+/* f0-f7 used for spreading out TLB flushes: */
+#define NUM_INVALIDATE_TLB_VECTORS	   8
+#define INVALIDATE_TLB_VECTOR_END	0xee
+#define INVALIDATE_TLB_VECTOR_START	\
+	(INVALIDATE_TLB_VECTOR_END - NUM_INVALIDATE_TLB_VECTORS + 1)
 
 #define NR_VECTORS			 256
 


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