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Diffstat (limited to 'hw/pci-host/q35.c')
-rw-r--r--hw/pci-host/q35.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index 02f9576588..966a7cf92d 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -51,6 +51,10 @@ static void q35_host_realize(DeviceState *dev, Error **errp)
     sysbus_add_io(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, &pci->data_mem);
     sysbus_init_ioports(sbd, MCH_HOST_BRIDGE_CONFIG_DATA, 4);
 
+    /* register q35 0xcf8 port as coalesced pio */
+    memory_region_set_flush_coalesced(&pci->data_mem);
+    memory_region_add_coalescing(&pci->conf_mem, 0, 4);
+
     pci->bus = pci_root_bus_new(DEVICE(s), "pcie.0",
                                 s->mch.pci_address_space,
                                 s->mch.address_space_io,
@@ -352,7 +356,7 @@ static void mch_update_pam(MCHPCIState *mch)
     memory_region_transaction_begin();
     for (i = 0; i < 13; i++) {
         pam_update(&mch->pam_regions[i], i,
-                   pd->config[MCH_HOST_BRIDGE_PAM0 + (DIV_ROUND_UP(i, 2))]);
+                   pd->config[MCH_HOST_BRIDGE_PAM0 + DIV_ROUND_UP(i, 2)]);
     }
     memory_region_transaction_commit();
 }