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[Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use
From: |
Marcelo Tosatti |
Subject: |
[Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio |
Date: |
Mon, 22 Feb 2010 13:57:54 -0300 |
User-agent: |
Mutt/1.5.20 (2009-08-17) |
Acked-by: "Michael S. Tsirkin" <address@hidden>
Signed-off-by: Marcelo Tosatti <address@hidden>
Index: qemu/kvm-all.c
===================================================================
--- qemu.orig/kvm-all.c
+++ qemu/kvm-all.c
@@ -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(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;
}
}
Index: qemu/qemu-barrier.h
===================================================================
--- /dev/null
+++ qemu/qemu-barrier.h
@@ -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
- Re: [Qemu-devel] Re: [patch uq/master 1/2] virtio-pci: wake up iothread on VIRTIO_PCI_QUEUE_NOTIFY, (continued)
- [Qemu-devel] [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio, Marcelo Tosatti, 2010/02/22
- [Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio, Avi Kivity, 2010/02/22
- [Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio, Marcelo Tosatti, 2010/02/22
- [Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio, Avi Kivity, 2010/02/22
- [Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio, Michael S. Tsirkin, 2010/02/22
- [Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio, Avi Kivity, 2010/02/22
- [Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio, Michael S. Tsirkin, 2010/02/22
- [Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio, Avi Kivity, 2010/02/22
[Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio, Michael S. Tsirkin, 2010/02/22
[Qemu-devel] Re: [patch uq/master 2/2] kvm-all.c: define smp_wmb and use it for coalesced mmio,
Marcelo Tosatti <=