From mboxrd@z Thu Jan  1 00:00:00 1970
From: Marcelo Tosatti <mtosatti@redhat.com>
Subject: [patch 2/3] QEMU/KVM: virtio register pow2 memory
	regions
Date: Mon, 17 Mar 2008 17:20:15 -0300
Message-ID: <20080317202125.391559627@localhost.localdomain>
References: <20080317202013.949027343@localhost.localdomain>
Mime-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit
Cc: kvm-devel <kvm-devel@lists.sourceforge.net>,
	Marcelo Tosatti <mtosatti@redhat.com>
To: Avi Kivity <avi@qumranet.com>
Return-path: <kvm-devel-bounces@lists.sourceforge.net>
Content-Disposition: inline; filename=fix-virtio
List-Unsubscribe: <https://lists.sourceforge.net/lists/listinfo/kvm-devel>,
	<mailto:kvm-devel-request@lists.sourceforge.net?subject=unsubscribe>
List-Archive: <http://sourceforge.net/mailarchive/forum.php?forum_name=kvm-devel>
List-Post: <mailto:kvm-devel@lists.sourceforge.net>
List-Help: <mailto:kvm-devel-request@lists.sourceforge.net?subject=help>
List-Subscribe: <https://lists.sourceforge.net/lists/listinfo/kvm-devel>,
	<mailto:kvm-devel-request@lists.sourceforge.net?subject=subscribe>
Sender: kvm-devel-bounces@lists.sourceforge.net
Errors-To: kvm-devel-bounces@lists.sourceforge.net
List-Id: kvm.vger.kernel.org

Otherwise the PCI size for such regions will be calculated erroneously.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Anthony Liguori <anthony@codemonkey.ws>

Index: kvm-userspace.hotplug3/qemu/hw/virtio.c
===================================================================
--- kvm-userspace.hotplug3.orig/qemu/hw/virtio.c
+++ kvm-userspace.hotplug3/qemu/hw/virtio.c
@@ -404,6 +404,7 @@ VirtIODevice *virtio_init_pci(PCIBus *bu
     VirtIODevice *vdev;
     PCIDevice *pci_dev;
     uint8_t *config;
+    uint32_t size;
 
     pci_dev = pci_register_device(bus, name, struct_size,
 				  -1, NULL, NULL);
@@ -441,7 +442,11 @@ VirtIODevice *virtio_init_pci(PCIBus *bu
     else
 	vdev->config = NULL;
 
-    pci_register_io_region(pci_dev, 0, 20 + config_size, PCI_ADDRESS_SPACE_IO,
+    size = 20 + config_size;
+    if (size & (size-1))
+        size = 1 << fls(size);
+
+    pci_register_io_region(pci_dev, 0, size, PCI_ADDRESS_SPACE_IO,
 			   virtio_map);
     qemu_register_reset(virtio_reset, vdev);
 

-- 


-------------------------------------------------------------------------
This SF.net email is sponsored by: Microsoft
Defy all challenges. Microsoft(R) Visual Studio 2008.
http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/