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Juergen Gross
b359d38013
Instead of having to include xenctrl.h for getting definitions of cpu barriers, add a dedicated header for that purpose. Switch the xen-9pfsd daemon to use the new header instead of xenctrl.h. This is in preparation of making Xenstore independent from libxenctrl. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Anthony PERARD <anthony.perard@vates.tech>
40 lines
1.1 KiB
C
40 lines
1.1 KiB
C
/* SPDX-License-Identifier: LGPL-2.1-only */
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/******************************************************************************
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* xen-barrier.h
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*
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* Definition of CPU barriers, part of libxenctrl.
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*
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* Copyright (c) 2003-2004, K A Fraser.
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*/
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#ifndef XEN_BARRIER_H
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#define XEN_BARRIER_H
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/*
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* DEFINITIONS FOR CPU BARRIERS
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*/
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#define xen_barrier() asm volatile ( "" : : : "memory")
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#if defined(__i386__)
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#define xen_mb() asm volatile ( "lock addl $0, -4(%%esp)" ::: "memory" )
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#define xen_rmb() xen_barrier()
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#define xen_wmb() xen_barrier()
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#elif defined(__x86_64__)
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#define xen_mb() asm volatile ( "lock addl $0, -32(%%rsp)" ::: "memory" )
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#define xen_rmb() xen_barrier()
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#define xen_wmb() xen_barrier()
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#elif defined(__arm__)
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#define xen_mb() asm volatile ("dmb" : : : "memory")
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#define xen_rmb() asm volatile ("dmb" : : : "memory")
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#define xen_wmb() asm volatile ("dmb" : : : "memory")
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#elif defined(__aarch64__)
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#define xen_mb() asm volatile ("dmb sy" : : : "memory")
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#define xen_rmb() asm volatile ("dmb sy" : : : "memory")
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#define xen_wmb() asm volatile ("dmb sy" : : : "memory")
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#else
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#error "Define barriers"
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#endif
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#endif /* XEN_BARRIER_H */
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