diff --git a/hw/pci-host/pam.c b/hw/pci-host/pam.c
index 99d7af97e7..17d826cba5 100644
--- a/hw/pci-host/pam.c
+++ b/hw/pci-host/pam.c
@@ -31,12 +31,6 @@
 #include "sysemu/sysemu.h"
 #include "hw/pci-host/pam.h"
 
-void smram_update(MemoryRegion *smram_region, uint8_t smram)
-{
-    bool smram_enabled = (smram & SMRAM_D_OPEN);
-    memory_region_set_enabled(smram_region, !smram_enabled);
-}
-
 void init_pam(DeviceState *dev, MemoryRegion *ram_memory,
               MemoryRegion *system_memory, MemoryRegion *pci_address_space,
               PAMMemoryRegion *mem, uint32_t start, uint32_t size)
diff --git a/hw/pci-host/piix.c b/hw/pci-host/piix.c
index a91ad73705..f1712b86fe 100644
--- a/hw/pci-host/piix.c
+++ b/hw/pci-host/piix.c
@@ -138,7 +138,8 @@ static void i440fx_update_memory_mappings(PCII440FXState *d)
         pam_update(&d->pam_regions[i], i,
                    pd->config[I440FX_PAM + ((i + 1) / 2)]);
     }
-    smram_update(&d->smram_region, pd->config[I440FX_SMRAM]);
+    memory_region_set_enabled(&d->smram_region,
+                              !(pd->config[I440FX_SMRAM] & SMRAM_D_OPEN));
     memory_region_set_enabled(&d->smram,
                               pd->config[I440FX_SMRAM] & SMRAM_G_SMRAME);
     memory_region_transaction_commit();
diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index eefa199335..24829e0d52 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -268,7 +268,8 @@ static void mch_update_smram(MCHPCIState *mch)
     PCIDevice *pd = PCI_DEVICE(mch);
 
     memory_region_transaction_begin();
-    smram_update(&mch->smram_region, pd->config[MCH_HOST_BRIDGE_SMRAM]);
+    memory_region_set_enabled(&mch->smram_region,
+                              !(pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_D_OPEN));
     memory_region_set_enabled(&mch->smram,
                               pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_G_SMRAME);
     memory_region_transaction_commit();
diff --git a/include/hw/pci-host/pam.h b/include/hw/pci-host/pam.h
index 80dd605b58..6116c638f9 100644
--- a/include/hw/pci-host/pam.h
+++ b/include/hw/pci-host/pam.h
@@ -86,7 +86,6 @@ typedef struct PAMMemoryRegion {
     unsigned current;
 } PAMMemoryRegion;
 
-void smram_update(MemoryRegion *smram_region, uint8_t smram);
 void init_pam(DeviceState *dev, MemoryRegion *ram, MemoryRegion *system,
               MemoryRegion *pci, PAMMemoryRegion *mem, uint32_t start, uint32_t size);
 void pam_update(PAMMemoryRegion *mem, int idx, uint8_t val);