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mirror_qemu/qemu-barrier.h

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kvm-all.c: define smp_wmb and use it for coalesced mmio Acked-by: "Michael S. Tsirkin" <mst@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-22 19:57:54 +03:00
#ifndef __QEMU_BARRIER_H
#define __QEMU_BARRIER_H 1
/* FIXME: arch dependant, x86 version */
#define smp_wmb() asm volatile("" ::: "memory")
Introduce proper compiler barrier Define barrier() as optimization barrier and replace (potentially unreliable) asm("") fences. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Acked-by: Paolo Bonzini <pbonzini@redhat.com> Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
2010-06-25 18:56:49 +04:00
/* Compiler barrier */
#define barrier() asm volatile("" ::: "memory")
kvm-all.c: define smp_wmb and use it for coalesced mmio Acked-by: "Michael S. Tsirkin" <mst@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-02-22 19:57:54 +03:00
#endif