tests/libqos/pci-pc: Fix qpci_pc_iomap() to map BARs aligned

qpci_pc_iomap() maps BARs one after the other, without padding.  This
is wrong.  PCI Local Bus Specification Revision 3.0, 6.2.5.1. Address
Maps: "all address spaces used are a power of two in size and are
naturally aligned".  That's because the size of a BAR is given by the
number of address bits the device decodes, and the BAR needs to be
mapped at a multiple of that size to ensure the address decoding
works.

Fix qpci_pc_iomap() accordingly.  This takes care of a FIXME in
ivshmem-test.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <1458066895-20632-7-git-send-email-armbru@redhat.com>

1 files changed, 6 insertions, 7 deletions

diff --git a/tests/ivshmem-test.c b/tests/ivshmem-test.c
index 4efa433..da6ca0d 100644
--- a/tests/ivshmem-test.c
+++ b/tests/ivshmem-test.c
@@ -110,18 +110,17 @@ static void setup_vm_cmd(IVState *s, const char *cmd, bool msix)
     s->pcibus = qpci_init_pc();
     s->dev = get_device(s->pcibus);
 
-    /* FIXME: other bar order fails, mappings changes */
-    s->mem_base = qpci_iomap(s->dev, 2, &barsize);
-    g_assert_nonnull(s->mem_base);
-    g_assert_cmpuint(barsize, ==, TMPSHMSIZE);
+    s->reg_base = qpci_iomap(s->dev, 0, &barsize);
+    g_assert_nonnull(s->reg_base);
+    g_assert_cmpuint(barsize, ==, 256);
 
     if (msix) {
         qpci_msix_enable(s->dev);
     }
 
-    s->reg_base = qpci_iomap(s->dev, 0, &barsize);
-    g_assert_nonnull(s->reg_base);
-    g_assert_cmpuint(barsize, ==, 256);
+    s->mem_base = qpci_iomap(s->dev, 2, &barsize);
+    g_assert_nonnull(s->mem_base);
+    g_assert_cmpuint(barsize, ==, TMPSHMSIZE);
 
     qpci_device_enable(s->dev);
 }