[Qemu-arm] [PATCH v2 6/6] hw/arm/virt: Set minimum_page_bits to 12

[Peter Maydell]

Since the virt board model will never create a CPU which is
pre-ARMv7, we know that our minimum page size is 4K and can
set minimum_page_bits accordingly, for improved performance.

Note that this is a migration compatibility break.

Signed-off-by: Peter Maydell <address@hidden>
---
 hw/arm/virt.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index c5c125e..f9b51aa 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -1440,6 +1440,8 @@ static void virt_machine_class_init(ObjectClass *oc, void 
*data)
     mc->block_default_type = IF_VIRTIO;
     mc->no_cdrom = 1;
     mc->pci_allow_0_address = true;
+    /* We know we will never create a pre-ARMv7 CPU which needs 1K pages */
+    mc->minimum_page_bits = 12;
 }
 
 static const TypeInfo virt_machine_info = {
-- 
1.9.1