added dynamic reassignment of memory regions

diff --git a/palacios/src/devices/pci.c b/palacios/src/devices/pci.c
index 602f47c..7832a08 100644 (file)
--- a/palacios/src/devices/pci.c
+++ b/palacios/src/devices/pci.c
@@ -397,6 +397,22 @@ static int bar_update(struct pci_device * pci, int bar_num, uint32_t new_val) {
 
            break;
        }
+       case PCI_BAR_MEM32: {
+           v3_unhook_mem(pci->vm_dev->vm, (addr_t)(bar->val));
+           
+           if (bar->mem_read) {
+               v3_hook_full_mem(pci->vm_dev->vm, PCI_MEM32_BASE(new_val), 
+                                PCI_MEM32_BASE(new_val) + (bar->num_pages * PAGE_SIZE_4KB),
+                                bar->mem_read, bar->mem_write, pci->vm_dev);
+           } else {
+               PrintError("Write hooks not supported for PCI\n");
+               return -1;
+           }
+
+           bar->val = new_val;
+
+           break;
+       }
        case PCI_BAR_NONE: {
            PrintDebug("Reprogramming an unsupported BAR register (Dev=%s) (bar=%d) (val=%x)\n", 
                       pci->name, bar_num, new_val);
@@ -761,11 +777,16 @@ struct pci_device * v3_pci_register_device(struct vm_device * pci,
            pci_dev->bar[i].default_base_port = bars[i].default_base_port;
            pci_dev->bar[i].io_read = bars[i].io_read;
            pci_dev->bar[i].io_write = bars[i].io_write;
-       } else {
+       } else if (pci_dev->bar[i].type == PCI_BAR_MEM32) {
            pci_dev->bar[i].num_pages = bars[i].num_pages;
            pci_dev->bar[i].default_base_addr = bars[i].default_base_addr;
            pci_dev->bar[i].mem_read = bars[i].mem_read;
            pci_dev->bar[i].mem_write = bars[i].mem_write;
+       } else {
+           pci_dev->bar[i].num_pages = 0;
+           pci_dev->bar[i].default_base_addr = 0;
+           pci_dev->bar[i].mem_read = NULL;
+           pci_dev->bar[i].mem_write = NULL;
        }
     }