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authorVincent Hanquez <vincent.hanquez@cl.cam.ac.uk>2005-06-23 00:08:46 -0700
committerLinus Torvalds <torvalds@ppc970.osdl.org>2005-06-23 09:45:14 -0700
commite9129e56e9ec50c0689eb4cf7a3ca132f1e776db (patch)
tree46ef37651b1d25afbe002e00d8c80c85df27d5fd /include/asm-x86_64
parent717b594a415bfaf2dbd5e8266636488f2564c689 (diff)
downloadlinux-next-e9129e56e9ec50c0689eb4cf7a3ca132f1e776db.tar.gz
[PATCH] xen: x86_64: Add macro for debugreg
Add 2 macros to set and get debugreg on x86_64. This is useful for Xen because it will need only to redefine each macro to a hypervisor call. Signed-off-by: Vincent Hanquez <vincent.hanquez@cl.cam.ac.uk> Cc: Ian Pratt <m+Ian.Pratt@cl.cam.ac.uk> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-x86_64')
-rw-r--r--include/asm-x86_64/processor.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/asm-x86_64/processor.h b/include/asm-x86_64/processor.h
index 8b55f139968f..106f666517bb 100644
--- a/include/asm-x86_64/processor.h
+++ b/include/asm-x86_64/processor.h
@@ -280,6 +280,14 @@ struct thread_struct {
set_fs(USER_DS); \
} while(0)
+#define get_debugreg(var, register) \
+ __asm__("movq %%db" #register ", %0" \
+ :"=r" (var))
+#define set_debugreg(value, register) \
+ __asm__("movq %0,%%db" #register \
+ : /* no output */ \
+ :"r" (value))
+
struct task_struct;
struct mm_struct;