x86: add CLBR_ defines for 64-bit (21438f7c) · Commits · 戴 / test

x86_64 needs a potentially larger clobber list than i386, due to its calling convention. So we add more CLBR_ defines for it. Note that CLBR_ANY is different for each of the architectures, since it comprises the notion of "All call clobbers in this architecture" Signed-off-by:

Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by:

Ingo Molnar <mingo@elte.hu> Signed-off-by:

Thomas Gleixner <tglx@linutronix.de>

include/asm-x86/paravirt.h

+18 −5

Original line number	Diff line number	Diff line
		@@ -8,11 +8,24 @@
		#include <asm/asm.h>

		/* Bitmask of what can be clobbered: usually at least eax. */
		#define CLBR_NONE 0x0
		#define CLBR_EAX 0x1
		#define CLBR_ECX 0x2
		#define CLBR_EDX 0x4
		#define CLBR_ANY 0x7
		#define CLBR_NONE 0
		#define CLBR_EAX (1 << 0)
		#define CLBR_ECX (1 << 1)
		#define CLBR_EDX (1 << 2)

		#ifdef CONFIG_X86_64
		#define CLBR_RSI (1 << 3)
		#define CLBR_RDI (1 << 4)
		#define CLBR_R8 (1 << 5)
		#define CLBR_R9 (1 << 6)
		#define CLBR_R10 (1 << 7)
		#define CLBR_R11 (1 << 8)
		#define CLBR_ANY ((1 << 9) - 1)
		#include <asm/desc_defs.h>
		#else
		/* CLBR_ANY should match all regs platform has. For i386, that's just it */
		#define CLBR_ANY ((1 << 3) - 1)
		#endif /* X86_64 */

		#ifndef __ASSEMBLY__
		#include <linux/types.h>

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