[Qemu-devel] [PATCH 1/2] Split region allocation code from pci_bios_init_device()

[Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>]

pci_bios_alloc() can be used to allocate space in the PCI region for
other purposes. This is needed by the AMD IOMMU support code.

Signed-off-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
---
 src/pciinit.c |   17 +++++++++++++----
 1 files changed, 13 insertions(+), 4 deletions(-)

diff --git a/src/pciinit.c b/src/pciinit.c
index 0556ee2..bfc669f 100644
--- a/src/pciinit.c
+++ b/src/pciinit.c
@@ -75,6 +75,16 @@ static void pci_bios_init_bridges(u16 bdf)
     }
 }
 
+static inline u32 pci_bios_alloc(u32 *region, u32 size)
+{
+    u32 ret;
+
+    ret = ALIGN(*region, size);
+    *region = ret + size;
+
+    return ret;
+}
+
 static void pci_bios_init_device(u16 bdf)
 {
     int class;
@@ -146,14 +156,13 @@ static void pci_bios_init_device(u16 bdf)
             pci_config_writel(bdf, ofs, old);
 
             if (val != 0) {
-                u32 size = (~(val & mask)) + 1;
+                u32 base, size = (~(val & mask)) + 1;
                 if (val & PCI_BASE_ADDRESS_SPACE_IO)
                     paddr = &pci_bios_io_addr;
                 else
                     paddr = &pci_bios_mem_addr;
-                *paddr = ALIGN(*paddr, size);
-                pci_set_io_region_addr(bdf, i, *paddr);
-                *paddr += size;
+                base = pci_bios_alloc(paddr, size);
+                pci_set_io_region_addr(bdf, i, base);
             }
         }
         break;
-- 
1.7.1