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authorJeremy Fitzhardinge <jeremy@goop.org>2009-02-02 13:55:42 -0800
committerH. Peter Anvin <hpa@linux.intel.com>2009-02-04 16:59:04 -0800
commit5393744b71ce797f1b1546fafaed127fc50c2b61 (patch)
treea974975e907b5e2830721c521965a53c34c10c8b /arch/x86/xen/xen-asm.h
parent383414322b3b3ced0cbc146801e0cc6c60a6c5f4 (diff)
xen: make direct versions of irq_enable/disable/save/restore to common code
Now that x86-64 has directly accessible percpu variables, it can also implement the direct versions of these operations, which operate on a vcpu_info structure directly embedded in the percpu area. In fact, the 64-bit versions are more or less identical, and so can be shared. The only two differences are: 1. xen_restore_fl_direct takes its argument in eax on 32-bit, and rdi on 64-bit. Unfortunately it isn't possible to directly refer to the 2nd lsb of rdi directly (as you can with %ah), so the code isn't quite as dense. 2. check_events needs to variants to save different registers. Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
Diffstat (limited to 'arch/x86/xen/xen-asm.h')
-rw-r--r--arch/x86/xen/xen-asm.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/x86/xen/xen-asm.h b/arch/x86/xen/xen-asm.h
new file mode 100644
index 000000000000..465276467a47
--- /dev/null
+++ b/arch/x86/xen/xen-asm.h
@@ -0,0 +1,12 @@
+#ifndef _XEN_XEN_ASM_H
+#define _XEN_XEN_ASM_H
+
+#include <linux/linkage.h>
+
+#define RELOC(x, v) .globl x##_reloc; x##_reloc=v
+#define ENDPATCH(x) .globl x##_end; x##_end=.
+
+/* Pseudo-flag used for virtual NMI, which we don't implement yet */
+#define XEN_EFLAGS_NMI 0x80000000
+
+#endif