3 files changed, 24 insertions, 0 deletions
diff --git a/src/soc/intel/alderlake/smihandler.c b/src/soc/intel/alderlake/smihandler.c
index a072138c96..5b53038834 100644
--- a/src/soc/intel/alderlake/smihandler.c
+++ b/src/soc/intel/alderlake/smihandler.c
@@ -24,6 +24,14 @@ void smihandler_soc_at_finalize(void)
 		heci_disable();
 }
 
+int smihandler_soc_disable_busmaster(pci_devfn_t dev)
+{
+	/* Skip disabling PMC bus master to keep IO decode enabled */
+	if (dev == PCH_DEV_PMC)
+		return 0;
+	return 1;
+}
+
 const smi_handler_t southbridge_smi[SMI_STS_BITS] = {
 	[SMI_ON_SLP_EN_STS_BIT] = smihandler_southbridge_sleep,
 	[APM_STS_BIT] = smihandler_southbridge_apmc,
diff --git a/src/soc/intel/jasperlake/smihandler.c b/src/soc/intel/jasperlake/smihandler.c
index 448c0539d7..2e38b68768 100644
--- a/src/soc/intel/jasperlake/smihandler.c
+++ b/src/soc/intel/jasperlake/smihandler.c
@@ -24,6 +24,14 @@ void smihandler_soc_at_finalize(void)
 		heci_disable();
 }
 
+int smihandler_soc_disable_busmaster(pci_devfn_t dev)
+{
+	/* Skip disabling PMC bus master to keep IO decode enabled */
+	if (dev == PCH_DEV_PMC)
+		return 0;
+	return 1;
+}
+
 const smi_handler_t southbridge_smi[SMI_STS_BITS] = {
 	[SMI_ON_SLP_EN_STS_BIT] = smihandler_southbridge_sleep,
 	[APM_STS_BIT] = smihandler_southbridge_apmc,
diff --git a/src/soc/intel/tigerlake/smihandler.c b/src/soc/intel/tigerlake/smihandler.c
index 67d21f8e33..6280fb28bd 100644
--- a/src/soc/intel/tigerlake/smihandler.c
+++ b/src/soc/intel/tigerlake/smihandler.c
@@ -24,6 +24,14 @@ void smihandler_soc_at_finalize(void)
 		heci_disable();
 }
 
+int smihandler_soc_disable_busmaster(pci_devfn_t dev)
+{
+	/* Skip disabling PMC bus master to keep IO decode enabled */
+	if (dev == PCH_DEV_PMC)
+		return 0;
+	return 1;
+}
+
 const smi_handler_t southbridge_smi[SMI_STS_BITS] = {
 	[SMI_ON_SLP_EN_STS_BIT] = smihandler_southbridge_sleep,
 	[APM_STS_BIT] = smihandler_southbridge_apmc,