X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=arch%2Fx86_64%2Fkernel%2Fxen_entry.S;fp=arch%2Fx86_64%2Fkernel%2Fxen_entry.S;h=b3d7f1940554199bf17f9a5478993ae25e8f0eb6;hb=1db395853d4f30d6120458bd279ede1f882a8525;hp=0000000000000000000000000000000000000000;hpb=34a75f0025b9cf803b6a88db032e6ad6950c9313;p=linux-2.6.git

diff --git a/arch/x86_64/kernel/xen_entry.S b/arch/x86_64/kernel/xen_entry.S
new file mode 100644
index 000000000..b3d7f1940
--- /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)
+        
+