diff --git a/xen/arch/arm/kernel.c b/xen/arch/arm/kernel.c
index 61808ac..9871bd9 100644
--- a/xen/arch/arm/kernel.c
+++ b/xen/arch/arm/kernel.c
@@ -299,7 +299,7 @@ static __init int kernel_decompress(struct bootmodule *mod)
         return -ENOMEM;
     }
     mfn = _mfn(page_to_mfn(pages));
-    output = __vmap(&mfn, 1 << kernel_order_out, 1, 1, PAGE_HYPERVISOR);
+    output = __vmap(&mfn, 1 << kernel_order_out, 1, 1, PAGE_HYPERVISOR, VMAP_DEFAULT);
 
     rc = perform_gunzip(output, input, size);
     clean_dcache_va_range(output, output_size);
diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 7065c3e..94ea054 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -807,7 +807,7 @@ void *ioremap_attr(paddr_t pa, size_t len, unsigned int attributes)
     mfn_t mfn = _mfn(PFN_DOWN(pa));
     unsigned int offs = pa & (PAGE_SIZE - 1);
     unsigned int nr = PFN_UP(offs + len);
-    void *ptr = __vmap(&mfn, nr, 1, 1, attributes);
+    void *ptr = __vmap(&mfn, nr, 1, 1, attributes, VMAP_DEFAULT);
 
     if ( ptr == NULL )
         return NULL;
diff --git a/xen/arch/x86/mm.c b/xen/arch/x86/mm.c
index a42097f..2bb920b 100644
--- a/xen/arch/x86/mm.c
+++ b/xen/arch/x86/mm.c
@@ -6179,7 +6179,7 @@ void __iomem *ioremap(paddr_t pa, size_t len)
         unsigned int offs = pa & (PAGE_SIZE - 1);
         unsigned int nr = PFN_UP(offs + len);
 
-        va = __vmap(&mfn, nr, 1, 1, PAGE_HYPERVISOR_NOCACHE) + offs;
+        va = __vmap(&mfn, nr, 1, 1, PAGE_HYPERVISOR_NOCACHE, VMAP_DEFAULT) + offs;
     }
 
     return (void __force __iomem *)va;
diff --git a/xen/common/vmap.c b/xen/common/vmap.c
index 134eda0..0b23f8f 100644
--- a/xen/common/vmap.c
+++ b/xen/common/vmap.c
@@ -10,40 +10,43 @@
 #include <asm/page.h>
 
 static DEFINE_SPINLOCK(vm_lock);
-static void *__read_mostly vm_base;
-#define vm_bitmap ((unsigned long *)vm_base)
+static void *__read_mostly vm_base[VMAP_REGION_NR];
+#define vm_bitmap(x) ((unsigned long *)vm_base[x])
 /* highest allocated bit in the bitmap */
-static unsigned int __read_mostly vm_top;
+static unsigned int __read_mostly vm_top[VMAP_REGION_NR];
 /* total number of bits in the bitmap */
-static unsigned int __read_mostly vm_end;
+static unsigned int __read_mostly vm_end[VMAP_REGION_NR];
 /* lowest known clear bit in the bitmap */
-static unsigned int vm_low;
+static unsigned int vm_low[VMAP_REGION_NR];
 
-void __init vm_init(void)
+void __init vm_init_type(enum vmap_region type, void *start, void *end)
 {
     unsigned int i, nr;
     unsigned long va;
 
-    vm_base = (void *)VMAP_VIRT_START;
-    vm_end = PFN_DOWN(arch_vmap_virt_end() - vm_base);
-    vm_low = PFN_UP((vm_end + 7) / 8);
-    nr = PFN_UP((vm_low + 7) / 8);
-    vm_top = nr * PAGE_SIZE * 8;
+    ASSERT(!vm_base[type]);
 
-    for ( i = 0, va = (unsigned long)vm_bitmap; i < nr; ++i, va += PAGE_SIZE )
+    vm_base[type] = start;
+    vm_end[type] = PFN_DOWN(end - start);
+    vm_low[type]= PFN_UP((vm_end[type] + 7) / 8);
+    nr = PFN_UP((vm_low[type] + 7) / 8);
+    vm_top[type] = nr * PAGE_SIZE * 8;
+
+    for ( i = 0, va = (unsigned long)vm_bitmap(type); i < nr; ++i, va += PAGE_SIZE )
     {
         struct page_info *pg = alloc_domheap_page(NULL, 0);
 
         map_pages_to_xen(va, page_to_mfn(pg), 1, PAGE_HYPERVISOR);
         clear_page((void *)va);
     }
-    bitmap_fill(vm_bitmap, vm_low);
+    bitmap_fill(vm_bitmap(type), vm_low[type]);
 
     /* Populate page tables for the bitmap if necessary. */
-    populate_pt_range(va, 0, vm_low - nr);
+    populate_pt_range(va, 0, vm_low[type] - nr);
 }
 
-void *vm_alloc(unsigned int nr, unsigned int align)
+static void *vm_alloc(unsigned int nr, unsigned int align,
+                      enum vmap_region t)
 {
     unsigned int start, bit;
 
@@ -52,27 +55,31 @@ void *vm_alloc(unsigned int nr, unsigned int align)
     else if ( align & (align - 1) )
         align &= -align;
 
+    ASSERT((t >= VMAP_DEFAULT) && (t < VMAP_REGION_NR));
+    if ( !vm_base[t] )
+        return NULL;
+
     spin_lock(&vm_lock);
     for ( ; ; )
     {
         struct page_info *pg;
 
-        ASSERT(vm_low == vm_top || !test_bit(vm_low, vm_bitmap));
-        for ( start = vm_low; start < vm_top; )
+        ASSERT(vm_low[t] == vm_top[t] || !test_bit(vm_low[t], vm_bitmap(t)));
+        for ( start = vm_low[t]; start < vm_top[t]; )
         {
-            bit = find_next_bit(vm_bitmap, vm_top, start + 1);
-            if ( bit > vm_top )
-                bit = vm_top;
+            bit = find_next_bit(vm_bitmap(t), vm_top[t], start + 1);
+            if ( bit > vm_top[t] )
+                bit = vm_top[t];
             /*
              * Note that this skips the first bit, making the
              * corresponding page a guard one.
              */
             start = (start + align) & ~(align - 1);
-            if ( bit < vm_top )
+            if ( bit < vm_top[t] )
             {
                 if ( start + nr < bit )
                     break;
-                start = find_next_zero_bit(vm_bitmap, vm_top, bit + 1);
+                start = find_next_zero_bit(vm_bitmap(t), vm_top[t], bit + 1);
             }
             else
             {
@@ -82,12 +89,12 @@ void *vm_alloc(unsigned int nr, unsigned int align)
             }
         }
 
-        if ( start < vm_top )
+        if ( start < vm_top[t] )
             break;
 
         spin_unlock(&vm_lock);
 
-        if ( vm_top >= vm_end )
+        if ( vm_top[t] >= vm_end[t] )
             return NULL;
 
         pg = alloc_domheap_page(NULL, 0);
@@ -96,23 +103,23 @@ void *vm_alloc(unsigned int nr, unsigned int align)
 
         spin_lock(&vm_lock);
 
-        if ( start >= vm_top )
+        if ( start >= vm_top[t] )
         {
-            unsigned long va = (unsigned long)vm_bitmap + vm_top / 8;
+            unsigned long va = (unsigned long)vm_bitmap(t) + vm_top[t] / 8;
 
             if ( !map_pages_to_xen(va, page_to_mfn(pg), 1, PAGE_HYPERVISOR) )
             {
                 clear_page((void *)va);
-                vm_top += PAGE_SIZE * 8;
-                if ( vm_top > vm_end )
-                    vm_top = vm_end;
+                vm_top[t] += PAGE_SIZE * 8;
+                if ( vm_top[t] > vm_end[t] )
+                    vm_top[t] = vm_end[t];
                 continue;
             }
         }
 
         free_domheap_page(pg);
 
-        if ( start >= vm_top )
+        if ( start >= vm_top[t] )
         {
             spin_unlock(&vm_lock);
             return NULL;
@@ -120,47 +127,58 @@ void *vm_alloc(unsigned int nr, unsigned int align)
     }
 
     for ( bit = start; bit < start + nr; ++bit )
-        __set_bit(bit, vm_bitmap);
-    if ( bit < vm_top )
-        ASSERT(!test_bit(bit, vm_bitmap));
+        __set_bit(bit, vm_bitmap(t));
+    if ( bit < vm_top[t] )
+        ASSERT(!test_bit(bit, vm_bitmap(t)));
     else
-        ASSERT(bit == vm_top);
-    if ( start <= vm_low + 2 )
-        vm_low = bit;
+        ASSERT(bit == vm_top[t]);
+    if ( start <= vm_low[t] + 2 )
+        vm_low[t] = bit;
     spin_unlock(&vm_lock);
 
-    return vm_base + start * PAGE_SIZE;
+    return vm_base[t] + start * PAGE_SIZE;
 }
 
-static unsigned int vm_index(const void *va)
+static unsigned int vm_index(const void *va, enum vmap_region type)
 {
     unsigned long addr = (unsigned long)va & ~(PAGE_SIZE - 1);
     unsigned int idx;
+    unsigned long start = (unsigned long)vm_base[type];
+
+    if ( !start )
+        return 0;
 
-    if ( addr < VMAP_VIRT_START + (vm_end / 8) ||
-         addr >= VMAP_VIRT_START + vm_top * PAGE_SIZE )
+    if ( addr < start + (vm_end[type] / 8) ||
+         addr >= start + vm_top[type] * PAGE_SIZE )
         return 0;
 
-    idx = PFN_DOWN(va - vm_base);
-    return !test_bit(idx - 1, vm_bitmap) &&
-           test_bit(idx, vm_bitmap) ? idx : 0;
+    idx = PFN_DOWN(va - vm_base[type]);
+    return !test_bit(idx - 1, vm_bitmap(type)) &&
+           test_bit(idx, vm_bitmap(type)) ? idx : 0;
 }
 
-static unsigned int vm_size(const void *va)
+static unsigned int vm_size(const void *va, enum vmap_region type)
 {
-    unsigned int start = vm_index(va), end;
+    unsigned int start = vm_index(va, type), end;
 
     if ( !start )
         return 0;
 
-    end = find_next_zero_bit(vm_bitmap, vm_top, start + 1);
+    end = find_next_zero_bit(vm_bitmap(type), vm_top[type], start + 1);
 
-    return min(end, vm_top) - start;
+    return min(end, vm_top[type]) - start;
 }
 
-void vm_free(const void *va)
+static void vm_free(const void *va)
 {
-    unsigned int bit = vm_index(va);
+    enum vmap_region type = VMAP_DEFAULT;
+    unsigned int bit = vm_index(va, type);
+
+    if ( !bit )
+    {
+        type = VMAP_XEN;
+        bit = vm_index(va, type);
+    }
 
     if ( !bit )
     {
@@ -169,22 +187,23 @@ void vm_free(const void *va)
     }
 
     spin_lock(&vm_lock);
-    if ( bit < vm_low )
+    if ( bit < vm_low[type] )
     {
-        vm_low = bit - 1;
-        while ( !test_bit(vm_low - 1, vm_bitmap) )
-            --vm_low;
+        vm_low[type] = bit - 1;
+        while ( !test_bit(vm_low[type] - 1, vm_bitmap(type)) )
+            --vm_low[type];
     }
-    while ( __test_and_clear_bit(bit, vm_bitmap) )
-        if ( ++bit == vm_top )
+    while ( __test_and_clear_bit(bit, vm_bitmap(type)) )
+        if ( ++bit == vm_top[type] )
             break;
     spin_unlock(&vm_lock);
 }
 
 void *__vmap(const mfn_t *mfn, unsigned int granularity,
-             unsigned int nr, unsigned int align, unsigned int flags)
+             unsigned int nr, unsigned int align, unsigned int flags,
+             enum vmap_region type)
 {
-    void *va = vm_alloc(nr * granularity, align);
+    void *va = vm_alloc(nr * granularity, align, type);
     unsigned long cur = (unsigned long)va;
 
     for ( ; va && nr--; ++mfn, cur += PAGE_SIZE * granularity )
@@ -201,22 +220,26 @@ void *__vmap(const mfn_t *mfn, unsigned int granularity,
 
 void *vmap(const mfn_t *mfn, unsigned int nr)
 {
-    return __vmap(mfn, 1, nr, 1, PAGE_HYPERVISOR);
+    return __vmap(mfn, 1, nr, 1, PAGE_HYPERVISOR, VMAP_DEFAULT);
 }
 
 void vunmap(const void *va)
 {
-#ifndef _PAGE_NONE
     unsigned long addr = (unsigned long)va;
+    unsigned int pages = vm_size(va, VMAP_DEFAULT);
+
+    if ( !pages )
+        pages = vm_size(va, VMAP_XEN);
 
-    destroy_xen_mappings(addr, addr + PAGE_SIZE * vm_size(va));
+#ifndef _PAGE_NONE
+    destroy_xen_mappings(addr, addr + PAGE_SIZE * pages);
 #else /* Avoid tearing down intermediate page tables. */
-    map_pages_to_xen((unsigned long)va, 0, vm_size(va), _PAGE_NONE);
+    map_pages_to_xen(addr, 0, pages, _PAGE_NONE);
 #endif
     vm_free(va);
 }
 
-void *vmalloc(size_t size)
+static void *vmalloc_type(size_t size, enum vmap_region type)
 {
     mfn_t *mfn;
     size_t pages, i;
@@ -238,7 +261,7 @@ void *vmalloc(size_t size)
         mfn[i] = _mfn(page_to_mfn(pg));
     }
 
-    va = vmap(mfn, pages);
+    va = __vmap(mfn, 1, pages, 1, PAGE_HYPERVISOR, type);
     if ( va == NULL )
         goto error;
 
@@ -252,9 +275,19 @@ void *vmalloc(size_t size)
     return NULL;
 }
 
+void *vmalloc(size_t size)
+{
+    return vmalloc_type(size, VMAP_DEFAULT);
+}
+
+void *vmalloc_xen(size_t size)
+{
+    return vmalloc_type(size, VMAP_XEN);
+}
+
 void *vzalloc(size_t size)
 {
-    void *p = vmalloc(size);
+    void *p = vmalloc_type(size, VMAP_DEFAULT);
     int i;
 
     if ( p == NULL )
@@ -271,11 +304,17 @@ void vfree(void *va)
     unsigned int i, pages;
     struct page_info *pg;
     PAGE_LIST_HEAD(pg_list);
+    enum vmap_region type = VMAP_DEFAULT;
 
     if ( !va )
         return;
 
-    pages = vm_size(va);
+    pages = vm_size(va, type);
+    if ( !pages )
+    {
+        type = VMAP_XEN;
+        pages = vm_size(va, type);
+    }
     ASSERT(pages);
 
     for ( i = 0; i < pages; i++ )
diff --git a/xen/drivers/acpi/osl.c b/xen/drivers/acpi/osl.c
index 8a28d87..9a49029 100644
--- a/xen/drivers/acpi/osl.c
+++ b/xen/drivers/acpi/osl.c
@@ -97,7 +97,7 @@ acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
 		if (IS_ENABLED(CONFIG_X86) && !((phys + size - 1) >> 20))
 			return __va(phys);
 		return __vmap(&mfn, PFN_UP(offs + size), 1, 1,
-			      ACPI_MAP_MEM_ATTR) + offs;
+			      ACPI_MAP_MEM_ATTR, VMAP_DEFAULT) + offs;
 	}
 	return __acpi_map_table(phys, size);
 }
diff --git a/xen/include/xen/vmap.h b/xen/include/xen/vmap.h
index 5671ac8..369560e 100644
--- a/xen/include/xen/vmap.h
+++ b/xen/include/xen/vmap.h
@@ -4,14 +4,22 @@
 #include <xen/mm.h>
 #include <asm/page.h>
 
-void *vm_alloc(unsigned int nr, unsigned int align);
-void vm_free(const void *);
+enum vmap_region {
+    VMAP_DEFAULT,
+    VMAP_XEN,
+    VMAP_REGION_NR,
+};
 
-void *__vmap(const mfn_t *mfn, unsigned int granularity,
-             unsigned int nr, unsigned int align, unsigned int flags);
+void vm_init_type(enum vmap_region type, void *start, void *end);
+
+void *__vmap(const mfn_t *mfn, unsigned int granularity, unsigned int nr,
+             unsigned int align, unsigned int flags, enum vmap_region);
 void *vmap(const mfn_t *mfn, unsigned int nr);
 void vunmap(const void *);
+
 void *vmalloc(size_t size);
+void *vmalloc_xen(size_t size);
+
 void *vzalloc(size_t size);
 void vfree(void *va);
 
@@ -24,7 +32,10 @@ static inline void iounmap(void __iomem *va)
     vunmap((void *)(addr & PAGE_MASK));
 }
 
-void vm_init(void);
 void *arch_vmap_virt_end(void);
+static inline void vm_init(void)
+{
+    vm_init_type(VMAP_DEFAULT, (void *)VMAP_VIRT_START, arch_vmap_virt_end());
+}
 
 #endif /* __XEN_VMAP_H__ */
