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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>
13 lines
283 B
C
13 lines
283 B
C
#ifndef _XEN_XEN_ASM_H
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#define _XEN_XEN_ASM_H
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#include <linux/linkage.h>
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#define RELOC(x, v) .globl x##_reloc; x##_reloc=v
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#define ENDPATCH(x) .globl x##_end; x##_end=.
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/* Pseudo-flag used for virtual NMI, which we don't implement yet */
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#define XEN_EFLAGS_NMI 0x80000000
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#endif
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