From a4c20c6a542da310eaa6930c2965845614808809 Mon Sep 17 00:00:00 2001
From: aliguori <aliguori@c046a42c-6fe2-441c-8c8c-71466251a162>
Date: Wed, 11 Feb 2009 15:21:16 +0000
Subject: qemu: warn if PCI region is not power of two (Marcelo Tosatti)

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

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6604 c046a42c-6fe2-441c-8c8c-71466251a162
---
 hw/pci.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'hw')

diff --git a/hw/pci.c b/hw/pci.c
index 5f97afad6..cd07273c8 100644
--- a/hw/pci.c
+++ b/hw/pci.c
@@ -247,6 +247,13 @@ void pci_register_io_region(PCIDevice *pci_dev, int region_num,
 
     if ((unsigned int)region_num >= PCI_NUM_REGIONS)
         return;
+
+    if (size & (size-1)) {
+        fprintf(stderr, "ERROR: PCI region size must be pow2 "
+                    "type=0x%x, size=0x%x\n", type, size);
+        exit(1);
+    }
+
     r = &pci_dev->io_regions[region_num];
     r->addr = -1;
     r->size = size;
-- 
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