Re: [PATCH 4/25] [PATCH] Add debugreg/load_rsp native hooks

On 8/8/07, Andi Kleen [off-list ref] wrote:

quoted

@@ -264,13 +270,64 @@ 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))
+static inline unsigned long native_get_debugreg(int regno)
+{
+     unsigned long val;

It would be better to have own functions for each debug register I think

Andi, you mean:
a) split the debugreg paravirt_ops in various
paravirt_ops.set/get_debugreg{X,Y,Z...}, and then join them together
in a set/get_debugreg(a,b) to keep the current interface. OR
b) keep one paravirt_ops for each set/get_debugreg, then split then in
various set/get_debugregX(a, b), changing the current interface, OR
c) plit the debugreg paravirt_ops in various
paravirt_ops.set/get_debugreg{X,Y,Z...}, and give each its own
function set/get_debugregX(a, b), again, changing the current
interface, OR
d) None of the above?

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