[PATCH] slow_map: minor improvements to ROM BAR handling

["Michael S. Tsirkin" <mst@redhat.com>]

ROM BAR can be handled same as regular BAR:
load_option_roms utility will take care of
copying it to RAM as appropriate.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
---

This patch applies on top of agraf's one,
it takes care of non-page aligned ROM BARs as well:
they mostly are taken care of, we just do not
need to warn user about them.

 hw/device-assignment.c |   20 +++++++++-----------
 1 files changed, 9 insertions(+), 11 deletions(-)

diff --git a/hw/device-assignment.c b/hw/device-assignment.c
index 000fa61..066fdb6 100644
--- a/hw/device-assignment.c
+++ b/hw/device-assignment.c
@@ -486,25 +486,23 @@ static int assigned_dev_register_regions(PCIRegion *io_regions,
                 : PCI_BASE_ADDRESS_SPACE_MEMORY;
 
             if (cur_region->size & 0xFFF) {
-                fprintf(stderr, "PCI region %d at address 0x%llx "
-                        "has size 0x%x, which is not a multiple of 4K. "
-                        "You might experience some performance hit due to that.\n",
-                        i, (unsigned long long)cur_region->base_addr,
-                        cur_region->size);
+                if (i != PCI_ROM_SLOT) {
+                    fprintf(stderr, "PCI region %d at address 0x%llx "
+                            "has size 0x%x, which is not a multiple of 4K. "
+                            "You might experience some performance hit "
+                            "due to that.\n",
+                            i, (unsigned long long)cur_region->base_addr,
+                            cur_region->size);
+                }
                 slow_map = 1;
             }
 
-            if (slow_map && (i == PCI_ROM_SLOT)) {
-                fprintf(stderr, "ROM not aligned - can't continue\n");
-                return -1;
-            }
-
             /* map physical memory */
             pci_dev->v_addrs[i].e_physbase = cur_region->base_addr;
             if (i == PCI_ROM_SLOT) {
                 pci_dev->v_addrs[i].u.r_virtbase =
                     mmap(NULL,
-                         (cur_region->size + 0xFFF) & 0xFFFFF000,
+                         cur_region->size,
                          PROT_WRITE | PROT_READ, MAP_ANONYMOUS | MAP_PRIVATE,
                          0, (off_t) 0);
 
-- 
1.6.6.rc1.43.gf55cc