On Mon, Feb 22, 2010 at 10:59:08AM -0300, Marcelo Tosatti wrote:
> Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx>
> Signed-off-by: Marcelo Tosatti <mtosatti@xxxxxxxxxx>
Acked-by: Michael S. Tsirkin <mst@xxxxxxxxxx>
We'll need implementation for other arches, I'll dust off
my patch that adds it and repost, but for now this
is better than what we have.
> Index: qemu/kvm-all.c
> ===================================================================
> --- qemu.orig/kvm-all.c
> +++ qemu/kvm-all.c
> @@ -718,6 +718,9 @@ static int kvm_handle_io(uint16_t port,
> return 1;
> }
>
> +/* FIXME: arch dependant, x86 version */
> +#define smp_wmb() asm volatile("" ::: "memory")
> +
> void kvm_flush_coalesced_mmio_buffer(void)
> {
> #ifdef KVM_CAP_COALESCED_MMIO
> @@ -730,7 +733,7 @@ void kvm_flush_coalesced_mmio_buffer(voi
> 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;
> }
> }
>
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