This commit was manufactured by cvs2svn to create branch 'vserver'.

[linux-2.6.git] / arch / x86_64 / kernel / xen_entry.S

diff --git a/arch/x86_64/kernel/xen_entry.S b/arch/x86_64/kernel/xen_entry.S
new file mode 100644 (file)
index 0000000..b3d7f19
--- /dev/null
+++ b/arch/x86_64/kernel/xen_entry.S
@@ -0,0 +1,40 @@
+/*
+ * Copied from arch/xen/i386/kernel/entry.S
+ */                        
+/* Offsets into shared_info_t. */                
+#define evtchn_upcall_pending          /* 0 */
+#define evtchn_upcall_mask             1
+
+#define sizeof_vcpu_shift              6
+
+#ifdef CONFIG_SMP
+//#define preempt_disable(reg) incl threadinfo_preempt_count(reg)
+//#define preempt_enable(reg)  decl threadinfo_preempt_count(reg)
+#define preempt_disable(reg)
+#define preempt_enable(reg)
+#define XEN_GET_VCPU_INFO(reg) preempt_disable(%rbp)                   ; \
+                               movq %gs:pda_cpunumber,reg              ; \
+                               shl  $32, reg                           ; \
+                               shr  $32-sizeof_vcpu_shift,reg          ; \
+                               addq HYPERVISOR_shared_info,reg
+#define XEN_PUT_VCPU_INFO(reg) preempt_enable(%rbp)                    ; \
+#define XEN_PUT_VCPU_INFO_fixup .byte 0xff,0xff,0xff
+#else
+#define XEN_GET_VCPU_INFO(reg) movq HYPERVISOR_shared_info,reg
+#define XEN_PUT_VCPU_INFO(reg)
+#define XEN_PUT_VCPU_INFO_fixup
+#endif
+
+#define XEN_LOCKED_BLOCK_EVENTS(reg)   movb $1,evtchn_upcall_mask(reg)
+#define XEN_LOCKED_UNBLOCK_EVENTS(reg) movb $0,evtchn_upcall_mask(reg)
+#define XEN_BLOCK_EVENTS(reg)  XEN_GET_VCPU_INFO(reg)                  ; \
+                               XEN_LOCKED_BLOCK_EVENTS(reg)            ; \
+                               XEN_PUT_VCPU_INFO(reg)
+#define XEN_UNBLOCK_EVENTS(reg)        XEN_GET_VCPU_INFO(reg)                  ; \
+                               XEN_LOCKED_UNBLOCK_EVENTS(reg)          ; \
+                               XEN_PUT_VCPU_INFO(reg)
+#define XEN_TEST_PENDING(reg)  testb $0xFF,evtchn_upcall_pending(reg)
+
+VGCF_IN_SYSCALL = (1<<8)
+        
+