Xen devel - Jan 2009 - [PATCH 3/3] xen: use direct ops on 64-bit

Enable the use of the direct vcpu-access operations on 64-bit.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 arch/x86/xen/enlighten.c |   14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

==================================================================---
a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -116,14 +116,7 @@
  *
  * 0: not available, 1: available
  */
-static int have_vcpu_info_placement -#ifdef CONFIG_X86_32
-	1
-#else
-	0
-#endif
-	;
-
+static int have_vcpu_info_placement = 1;
 
 static void xen_vcpu_setup(int cpu)
 {
@@ -1644,11 +1637,6 @@
 	machine_ops = xen_machine_ops;
 
 #ifdef CONFIG_X86_64
-	/* Disable until direct per-cpu data access. */
-	have_vcpu_info_placement = 0;
-#endif
-
-#ifdef CONFIG_X86_64
 	/*
 	 * Setup percpu state.  We only need to do this for 64-bit
          * because 32-bit already has %fs set properly.



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Tejun Heo wrote:
> Jeremy Fitzhardinge wrote:
>   
>> Enable the use of the direct vcpu-access operations on 64-bit.
>>
>> Signed-off-by: Jeremy Fitzhardinge
<jeremy.fitzhardinge@citrix.com>
>>     
>
> Hmmm... these three patches conflict with the previous two patches.
> I''ll soon send out a new tree.  Can you please wait a bit and
refresh
> the patches?
Sorry about that; I had to do a fair amount of hacking to get things 
going in the end.  I mailed out those other patches prematurely after 
"testing" them with the wrong kernel.

I''ll send updated fixes when I see your changes appear in tip.git.

    J

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Enable the use of the direct vcpu-access operations on 64-bit.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 arch/x86/xen/enlighten.c |   14 +-------------
 1 file changed, 1 insertion(+), 13 deletions(-)

==================================================================---
a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -116,14 +116,7 @@
  *
  * 0: not available, 1: available
  */
-static int have_vcpu_info_placement -#ifdef CONFIG_X86_32
-	1
-#else
-	0
-#endif
-	;
-
+static int have_vcpu_info_placement = 1;
 
 static void xen_vcpu_setup(int cpu)
 {
@@ -1644,11 +1637,6 @@
 	machine_ops = xen_machine_ops;
 
 #ifdef CONFIG_X86_64
-	/* Disable until direct per-cpu data access. */
-	have_vcpu_info_placement = 0;
-#endif
-
-#ifdef CONFIG_X86_64
 	/*
 	 * Setup percpu state.  We only need to do this for 64-bit
          * because 32-bit already has %fs set properly.



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