From 139ec7c416248b9ea227d21839235344edfee1e0 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Thu, 7 Dec 2006 02:14:08 +0100 Subject: [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 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 Signed-off-by: Jeremy Fitzhardinge Signed-off-by: Chris Wright Signed-off-by: Zachary Amsden Signed-off-by: Andi Kleen Signed-off-by: Andrew Morton --- include/asm-i386/irqflags.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/asm-i386/irqflags.h') diff --git a/include/asm-i386/irqflags.h b/include/asm-i386/irqflags.h index 9ce01f3..17b18cf 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) } #else -#define DISABLE_INTERRUPTS cli -#define ENABLE_INTERRUPTS sti +#define DISABLE_INTERRUPTS(clobbers) cli +#define ENABLE_INTERRUPTS(clobbers) sti #define ENABLE_INTERRUPTS_SYSEXIT sti; sysexit #define INTERRUPT_RETURN iret #define GET_CR0_INTO_EAX movl %cr0, %eax -- cgit v1.1