From bae1d2507e44417455eda76d4435352fee14cf51 Mon Sep 17 00:00:00 2001
From: Ravikiran G Thirumalai <kiran@scalex86.org>
Date: Fri, 4 Apr 2008 03:06:29 -0700
Subject: [PATCH] x86: fix breakage of vSMP irq operations
25-rc* stopped working with CONFIG_X86_VSMP on vSMP machines.
Looks like the vsmp irq ops got accidentally removed during merge of x86_64
pvops in 2.6.25. -- commit 6abcd98ffafbff81f0bfd7ee1d129e634af13245 removed
vsmp irq ops.
Tested with both CONFIG_X86_VSMP and without CONFIG_X86_VSMP, on vSMP and non
vSMP x86_64 machines.
Please apply.
Signed-off-by: Ravikiran Thirumalai <kiran@scalex86.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
include/asm-x86/irqflags.h | 29 +++++++++++++++++++++++++++++
1 file changed, 29 insertions(+)
diff --git a/include/asm-x86/irqflags.h b/include/asm-x86/irqflags.h
index 92021c1ffa3ae..0e2292483b357 100644
--- a/include/asm-x86/irqflags.h
+++ b/include/asm-x86/irqflags.h
@@ -70,6 +70,26 @@ static inline void raw_local_irq_restore(unsigned long flags)
native_restore_fl(flags);
}
+#ifdef CONFIG_X86_VSMP
+
+/*
+ * Interrupt control for the VSMP architecture:
+ */
+
+static inline void raw_local_irq_disable(void)
+{
+ unsigned long flags = __raw_local_save_flags();
+ raw_local_irq_restore((flags & ~X86_EFLAGS_IF) | X86_EFLAGS_AC);
+}
+
+static inline void raw_local_irq_enable(void)
+{
+ unsigned long flags = __raw_local_save_flags();
+ raw_local_irq_restore((flags | X86_EFLAGS_IF) & (~X86_EFLAGS_AC));
+}
+
+#else
+
static inline void raw_local_irq_disable(void)
{
native_irq_disable();
@@ -80,6 +100,8 @@ static inline void raw_local_irq_enable(void)
native_irq_enable();
}
+#endif
+
/*
* Used in the idle loop; sti takes one instruction cycle
* to complete:
@@ -137,10 +159,17 @@ static inline unsigned long __raw_local_irq_save(void)
#define raw_local_irq_save(flags) \
do { (flags) = __raw_local_irq_save(); } while (0)
+#ifdef CONFIG_X86_VSMP
+static inline int raw_irqs_disabled_flags(unsigned long flags)
+{
+ return !(flags & X86_EFLAGS_IF) || (flags & X86_EFLAGS_AC);
+}
+#else
static inline int raw_irqs_disabled_flags(unsigned long flags)
{
return !(flags & X86_EFLAGS_IF);
}
+#endif
static inline int raw_irqs_disabled(void)
{
--
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