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authorRusty Russell <rusty@rustcorp.com.au>2006-12-06 20:14:08 -0500
committerAndi Kleen <andi@basil.nowhere.org>2006-12-06 20:14:08 -0500
commit139ec7c416248b9ea227d21839235344edfee1e0 (patch)
tree54c396848b08367c0352c77f4633be6380a8eb16 /include/asm-i386/irqflags.h
parentd3561b7fa0fb0fc583bab0eeda32bec9e4c4056d (diff)
[PATCH] paravirt: Patch inline replacements for paravirt intercepts
It turns out that the most called ops, by several orders of magnitude, are the interrupt manipulation ops. These are obvious candidates for patching, so mark them up and create infrastructure for it. The method used is that the ops structure has a patch function, which is called for each place which needs to be patched: this returns a number of instructions (the rest are NOP-padded). Usually we can spare a register (%eax) for the binary patched code to use, but in a couple of critical places in entry.S we can't: we make the clobbers explicit at the call site, and manually clobber the allowed registers in debug mode as an extra check. And: Don't abuse CONFIG_DEBUG_KERNEL, add CONFIG_DEBUG_PARAVIRT. And: AK: Fix warnings in x86-64 alternative.c build And: AK: Fix compilation with defconfig And: ^From: Andrew Morton <akpm@osdl.org> Some binutlises still like to emit references to __stop_parainstructions and __start_parainstructions. And: AK: Fix warnings about unused variables when PARAVIRT is disabled. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com> Signed-off-by: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Zachary Amsden <zach@vmware.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org>
Diffstat (limited to 'include/asm-i386/irqflags.h')
-rw-r--r--include/asm-i386/irqflags.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-i386/irqflags.h b/include/asm-i386/irqflags.h
index 9ce01f3fb7bc..17b18cf4fe9d 100644
--- a/include/asm-i386/irqflags.h
+++ b/include/asm-i386/irqflags.h
@@ -79,8 +79,8 @@ static inline unsigned long __raw_local_irq_save(void)
79} 79}
80 80
81#else 81#else
82#define DISABLE_INTERRUPTS cli 82#define DISABLE_INTERRUPTS(clobbers) cli
83#define ENABLE_INTERRUPTS sti 83#define ENABLE_INTERRUPTS(clobbers) sti
84#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit 84#define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit
85#define INTERRUPT_RETURN iret 85#define INTERRUPT_RETURN iret
86#define GET_CR0_INTO_EAX movl %cr0, %eax 86#define GET_CR0_INTO_EAX movl %cr0, %eax