diff mbox series

[2/8] hw/pci-host/prep: Correct RAVEN bus bridge memory region size

Message ID 20200531173814.8734-3-f4bug@amsat.org (mailing list archive)
State Superseded
Headers show
Series hw: Fix some incomplete memory region size | expand

Commit Message

Philippe Mathieu-Daudé May 31, 2020, 5:38 p.m. UTC 
memory_region_set_size() handle the 16 Exabytes limit by
special-casing the UINT64_MAX value. This is not a problem
for the 32-bit maximum, 4 GiB.
By using the UINT32_MAX value, the bm-raven MemoryRegion
ends up missing 1 byte:

  $ qemu-system-ppc -M prep -S -monitor stdio -usb
  memory-region: bm-raven
    0000000000000000-00000000fffffffe (prio 0, i/o): bm-raven
      0000000000000000-000000003effffff (prio 0, i/o): alias bm-pci-memory @pci-memory 0000000000000000-000000003effffff
      0000000080000000-00000000ffffffff (prio 0, i/o): alias bm-system @system 0000000000000000-000000007fffffff

Fix by using the correct value. We now have:

  memory-region: bm-raven
    0000000000000000-00000000ffffffff (prio 0, i/o): bm-raven
      0000000000000000-000000003effffff (prio 0, i/o): alias bm-pci-memory @pci-memory 0000000000000000-000000003effffff
      0000000080000000-00000000ffffffff (prio 0, i/o): alias bm-system @system 0000000000000000-000000007fffffff

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
 hw/pci-host/prep.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/hw/pci-host/prep.c b/hw/pci-host/prep.c
index 1a02e9a670..88e2fc66a9 100644
--- a/hw/pci-host/prep.c
+++ b/hw/pci-host/prep.c
@@ -294,7 +294,7 @@  static void raven_pcihost_initfn(Object *obj)
                              &s->pci_memory, &s->pci_io, 0, TYPE_PCI_BUS);
 
     /* Bus master address space */
-    memory_region_init(&s->bm, obj, "bm-raven", UINT32_MAX);
+    memory_region_init(&s->bm, obj, "bm-raven", 4 * GiB);
     memory_region_init_alias(&s->bm_pci_memory_alias, obj, "bm-pci-memory",
                              &s->pci_memory, 0,
                              memory_region_size(&s->pci_memory));