diff --git a/xen/arch/x86/setup.c b/xen/arch/x86/setup.c
index e9c2c51a54..1fd70ec81c 100644
--- a/xen/arch/x86/setup.c
+++ b/xen/arch/x86/setup.c
@@ -1438,7 +1438,7 @@ void arch_get_xen_caps(xen_capabilities_info_t *info)
     }
 }
 
-int __init xen_in_range(unsigned long mfn)
+int __hwdom_init xen_in_range(unsigned long mfn)
 {
     paddr_t start, end;
     int i;
@@ -1446,7 +1446,7 @@ int __init xen_in_range(unsigned long mfn)
     enum { region_s3, region_text, region_bss, nr_regions };
     static struct {
         paddr_t s, e;
-    } xen_regions[nr_regions] __initdata;
+    } xen_regions[nr_regions] __hwdom_initdata;
 
     /* initialize first time */
     if ( !xen_regions[0].s )
diff --git a/xen/drivers/passthrough/amd/pci_amd_iommu.c b/xen/drivers/passthrough/amd/pci_amd_iommu.c
index cf67494fa4..ff5f06e305 100644
--- a/xen/drivers/passthrough/amd/pci_amd_iommu.c
+++ b/xen/drivers/passthrough/amd/pci_amd_iommu.c
@@ -169,7 +169,8 @@ static void amd_iommu_setup_domain_device(
     }
 }
 
-static int __init amd_iommu_setup_dom0_device(u8 devfn, struct pci_dev *pdev)
+static int __hwdom_init amd_iommu_setup_dom0_device(
+    u8 devfn, struct pci_dev *pdev)
 {
     int bdf = PCI_BDF2(pdev->bus, pdev->devfn);
     struct amd_iommu *iommu = find_iommu_for_device(pdev->seg, bdf);
@@ -280,7 +281,7 @@ static int amd_iommu_domain_init(struct domain *d)
     return 0;
 }
 
-static void __init amd_iommu_dom0_init(struct domain *d)
+static void __hwdom_init amd_iommu_dom0_init(struct domain *d)
 {
     unsigned long i; 
 
diff --git a/xen/drivers/passthrough/iommu.c b/xen/drivers/passthrough/iommu.c
index 54d891fc79..3e5635cd61 100644
--- a/xen/drivers/passthrough/iommu.c
+++ b/xen/drivers/passthrough/iommu.c
@@ -45,7 +45,7 @@ custom_param("iommu", parse_iommu_param);
 bool_t __initdata iommu_enable = 1;
 bool_t __read_mostly iommu_enabled;
 bool_t __read_mostly force_iommu;
-bool_t __initdata iommu_dom0_strict;
+bool_t __hwdom_initdata iommu_dom0_strict;
 bool_t __read_mostly iommu_verbose;
 bool_t __read_mostly iommu_workaround_bios_bug;
 bool_t __read_mostly iommu_passthrough;
@@ -130,7 +130,7 @@ int iommu_domain_init(struct domain *d)
     return hd->platform_ops->init(d);
 }
 
-static __init void check_dom0_pvh_reqs(struct domain *d)
+static void __hwdom_init check_dom0_pvh_reqs(struct domain *d)
 {
     if ( !iommu_enabled )
         panic("Presently, iommu must be enabled for pvh dom0\n");
@@ -141,7 +141,7 @@ static __init void check_dom0_pvh_reqs(struct domain *d)
     iommu_dom0_strict = 1;
 }
 
-void __init iommu_dom0_init(struct domain *d)
+void __hwdom_init iommu_dom0_init(struct domain *d)
 {
     struct hvm_iommu *hd = domain_hvm_iommu(d);
 
diff --git a/xen/drivers/passthrough/pci.c b/xen/drivers/passthrough/pci.c
index ff78142db5..dfa195ac9e 100644
--- a/xen/drivers/passthrough/pci.c
+++ b/xen/drivers/passthrough/pci.c
@@ -893,7 +893,7 @@ static void setup_one_dom0_device(const struct setup_dom0 *ctxt,
               PCI_SLOT(devfn) == PCI_SLOT(pdev->devfn) );
 }
 
-static int __init _setup_dom0_pci_devices(struct pci_seg *pseg, void *arg)
+static int __hwdom_init _setup_dom0_pci_devices(struct pci_seg *pseg, void *arg)
 {
     struct setup_dom0 *ctxt = arg;
     int bus, devfn;
@@ -943,7 +943,7 @@ static int __init _setup_dom0_pci_devices(struct pci_seg *pseg, void *arg)
     return 0;
 }
 
-void __init setup_dom0_pci_devices(
+void __hwdom_init setup_dom0_pci_devices(
     struct domain *d, int (*handler)(u8 devfn, struct pci_dev *))
 {
     struct setup_dom0 ctxt = { .d = d, .handler = handler };
diff --git a/xen/drivers/passthrough/vtd/iommu.c b/xen/drivers/passthrough/vtd/iommu.c
index 9c8e4a34ff..d22d51850f 100644
--- a/xen/drivers/passthrough/vtd/iommu.c
+++ b/xen/drivers/passthrough/vtd/iommu.c
@@ -1242,7 +1242,7 @@ static int intel_iommu_domain_init(struct domain *d)
     return 0;
 }
 
-static void __init intel_iommu_dom0_init(struct domain *d)
+static void __hwdom_init intel_iommu_dom0_init(struct domain *d)
 {
     struct acpi_drhd_unit *drhd;
 
@@ -1992,7 +1992,7 @@ static int intel_iommu_remove_device(u8 devfn, struct pci_dev *pdev)
     return domain_context_unmap(pdev->domain, devfn, pdev);
 }
 
-static int __init setup_dom0_device(u8 devfn, struct pci_dev *pdev)
+static int __hwdom_init setup_dom0_device(u8 devfn, struct pci_dev *pdev)
 {
     int err;
 
@@ -2140,7 +2140,7 @@ static int init_vtd_hw(void)
     return 0;
 }
 
-static void __init setup_dom0_rmrr(struct domain *d)
+static void __hwdom_init setup_dom0_rmrr(struct domain *d)
 {
     struct acpi_rmrr_unit *rmrr;
     u16 bdf;
diff --git a/xen/drivers/passthrough/vtd/quirks.c b/xen/drivers/passthrough/vtd/quirks.c
index 7f6c3a75c5..fbba23b234 100644
--- a/xen/drivers/passthrough/vtd/quirks.c
+++ b/xen/drivers/passthrough/vtd/quirks.c
@@ -384,7 +384,7 @@ void me_wifi_quirk(struct domain *domain, u8 bus, u8 devfn, int map)
  *   - This can cause system failure upon non-fatal VT-d faults
  *   - Potential security issue if malicious guest trigger VT-d faults
  */
-void __init pci_vtd_quirk(struct pci_dev *pdev)
+void __hwdom_init pci_vtd_quirk(struct pci_dev *pdev)
 {
     int seg = pdev->seg;
     int bus = pdev->bus;
diff --git a/xen/drivers/passthrough/vtd/x86/vtd.c b/xen/drivers/passthrough/vtd/x86/vtd.c
index f271a42b28..00131b3ab7 100644
--- a/xen/drivers/passthrough/vtd/x86/vtd.c
+++ b/xen/drivers/passthrough/vtd/x86/vtd.c
@@ -36,7 +36,7 @@
  * iommu_inclusive_mapping: when set, all memory below 4GB is included in dom0
  * 1:1 iommu mappings except xen and unusable regions.
  */
-static bool_t __initdata iommu_inclusive_mapping = 1;
+static bool_t __hwdom_initdata iommu_inclusive_mapping = 1;
 boolean_param("iommu_inclusive_mapping", iommu_inclusive_mapping);
 
 void *map_vtd_domain_page(u64 maddr)
@@ -107,7 +107,7 @@ void hvm_dpci_isairq_eoi(struct domain *d, unsigned int isairq)
     spin_unlock(&d->event_lock);
 }
 
-void __init iommu_set_dom0_mapping(struct domain *d)
+void __hwdom_init iommu_set_dom0_mapping(struct domain *d)
 {
     unsigned long i, j, tmp, top;
 
diff --git a/xen/include/asm-x86/config.h b/xen/include/asm-x86/config.h
index 24f95a37ca..02ab1fc46b 100644
--- a/xen/include/asm-x86/config.h
+++ b/xen/include/asm-x86/config.h
@@ -54,6 +54,10 @@
 
 #define CONFIG_MULTIBOOT 1
 
+#ifdef XSM_ENABLE
+#define CONFIG_LATE_HWDOM 1
+#endif
+
 #define HZ 100
 
 #define OPT_CONSOLE_STR "vga"
diff --git a/xen/include/xen/init.h b/xen/include/xen/init.h
index 9d481b3fef..b3bced37ab 100644
--- a/xen/include/xen/init.h
+++ b/xen/include/xen/init.h
@@ -129,4 +129,12 @@ extern struct kernel_param __setup_start, __setup_end;
 #define __devexitdata __exitdata
 #endif
 
+#ifdef CONFIG_LATE_HWDOM
+#define __hwdom_init
+#define __hwdom_initdata  __read_mostly
+#else
+#define __hwdom_init      __init
+#define __hwdom_initdata  __initdata
+#endif
+
 #endif /* _LINUX_INIT_H */