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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>
This commit is contained in:
Marcelo Tosatti 2010-02-22 13:57:54 -03:00 committed by Avi Kivity
parent 6312b92853
commit 85199474d0
2 changed files with 9 additions and 1 deletions
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3
kvm-all.c
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@ -21,6 +21,7 @@
#include <linux/kvm.h>
#include "qemu-common.h"
#include "qemu-barrier.h"
#include "sysemu.h"
#include "hw/hw.h"
#include "gdbstub.h"
@ -730,7 +731,7 @@ void kvm_flush_coalesced_mmio_buffer(void)
ent = &ring->coalesced_mmio[ring->first];
cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
/* FIXME smp_wmb() */
smp_wmb();
ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
}
}

7
qemu-barrier.h Normal file
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@ -0,0 +1,7 @@
#ifndef __QEMU_BARRIER_H
#define __QEMU_BARRIER_H 1
/* FIXME: arch dependant, x86 version */
#define smp_wmb() asm volatile("" ::: "memory")
#endif