diff -r c8962b24fb50 xen/arch/x86/setup.c
--- a/xen/arch/x86/setup.c	Fri Jan 30 11:12:57 2009 +0900
+++ b/xen/arch/x86/setup.c	Thu Feb 05 13:58:35 2009 -0700
@@ -109,6 +109,7 @@ extern void early_cpu_init(void);
 extern void early_cpu_init(void);
 extern void vesa_init(void);
 extern void vesa_mtrr_init(void);
+extern void init_tmem(void);
 
 DEFINE_PER_CPU(struct desc_struct *, gdt_table) = boot_cpu_gdt_table;
 #ifdef CONFIG_COMPAT
@@ -1056,6 +1057,8 @@ void __init __start_xen(unsigned long mb
 
     init_trace_bufs();
 
+    init_tmem();
+
     console_endboot();
 
     /* Hide UART from DOM0 if we're using it */
diff -r c8962b24fb50 xen/arch/x86/x86_32/entry.S
--- a/xen/arch/x86/x86_32/entry.S	Fri Jan 30 11:12:57 2009 +0900
+++ b/xen/arch/x86/x86_32/entry.S	Thu Feb 05 13:58:35 2009 -0700
@@ -703,6 +703,7 @@ ENTRY(hypercall_table)
         .long do_sysctl             /* 35 */
         .long do_domctl
         .long do_kexec_op
+        .long do_tmem_op
         .rept __HYPERVISOR_arch_0-((.-hypercall_table)/4)
         .long do_ni_hypercall
         .endr
@@ -750,6 +751,7 @@ ENTRY(hypercall_args_table)
         .byte 1 /* do_sysctl            */  /* 35 */
         .byte 1 /* do_domctl            */
         .byte 2 /* do_kexec_op          */
+        .byte 1 /* do_tmem_op           */
         .rept __HYPERVISOR_arch_0-(.-hypercall_args_table)
         .byte 0 /* do_ni_hypercall      */
         .endr
diff -r c8962b24fb50 xen/arch/x86/x86_64/compat/entry.S
--- a/xen/arch/x86/x86_64/compat/entry.S	Fri Jan 30 11:12:57 2009 +0900
+++ b/xen/arch/x86/x86_64/compat/entry.S	Thu Feb 05 13:58:35 2009 -0700
@@ -408,6 +408,7 @@ ENTRY(compat_hypercall_table)
         .quad do_sysctl                 /* 35 */
         .quad do_domctl
         .quad compat_kexec_op
+        .quad do_tmem_op
         .rept __HYPERVISOR_arch_0-((.-compat_hypercall_table)/8)
         .quad compat_ni_hypercall
         .endr
@@ -455,6 +456,7 @@ ENTRY(compat_hypercall_args_table)
         .byte 1 /* do_sysctl                */  /* 35 */
         .byte 1 /* do_domctl                */
         .byte 2 /* compat_kexec_op          */
+        .byte 1 /* do_tmem_op               */
         .rept __HYPERVISOR_arch_0-(.-compat_hypercall_args_table)
         .byte 0 /* compat_ni_hypercall      */
         .endr
diff -r c8962b24fb50 xen/arch/x86/x86_64/entry.S
--- a/xen/arch/x86/x86_64/entry.S	Fri Jan 30 11:12:57 2009 +0900
+++ b/xen/arch/x86/x86_64/entry.S	Thu Feb 05 13:58:35 2009 -0700
@@ -692,6 +692,7 @@ ENTRY(hypercall_table)
         .quad do_sysctl             /* 35 */
         .quad do_domctl
         .quad do_kexec_op
+        .quad do_tmem_op
         .rept __HYPERVISOR_arch_0-((.-hypercall_table)/8)
         .quad do_ni_hypercall
         .endr
@@ -739,7 +740,7 @@ ENTRY(hypercall_args_table)
         .byte 1 /* do_sysctl            */  /* 35 */
         .byte 1 /* do_domctl            */
         .byte 2 /* do_kexec             */
-        .byte 1 /* do_xsm_op            */
+        .byte 1 /* do_tmem_op           */
         .rept __HYPERVISOR_arch_0-(.-hypercall_args_table)
         .byte 0 /* do_ni_hypercall      */
         .endr
diff -r c8962b24fb50 xen/common/Makefile
--- a/xen/common/Makefile	Fri Jan 30 11:12:57 2009 +0900
+++ b/xen/common/Makefile	Thu Feb 05 13:58:35 2009 -0700
@@ -28,6 +28,10 @@ obj-y += vsprintf.o
 obj-y += vsprintf.o
 obj-y += xmalloc_tlsf.o
 obj-y += rcupdate.o
+obj-y += tmem.o
+obj-y += tmem_xen.o
+obj-y += radix-tree.o
+obj-y += lzo.o
 
 obj-$(perfc)       += perfc.o
 obj-$(crash_debug) += gdbstub.o
diff -r c8962b24fb50 xen/common/domain.c
--- a/xen/common/domain.c	Fri Jan 30 11:12:57 2009 +0900
+++ b/xen/common/domain.c	Thu Feb 05 13:58:35 2009 -0700
@@ -30,6 +30,7 @@
 #include <public/sched.h>
 #include <public/vcpu.h>
 #include <xsm/xsm.h>
+#include <xen/tmem.h>
 
 /* Linux config option: propageted to domain0 */
 /* xen_processor_pmbits: xen control Cx, Px, ... */
@@ -569,6 +570,9 @@ static void complete_domain_destroy(stru
 
     grant_table_destroy(d);
 
+    if ( d->tmem != NULL )
+        tmem_destroy(d->tmem);
+
     arch_domain_destroy(d);
 
     rangeset_domain_destroy(d);
diff -r c8962b24fb50 xen/include/xen/hypercall.h
--- a/xen/include/xen/hypercall.h	Fri Jan 30 11:12:57 2009 +0900
+++ b/xen/include/xen/hypercall.h	Thu Feb 05 13:58:35 2009 -0700
@@ -117,6 +117,10 @@ do_xsm_op(
 do_xsm_op(
     XEN_GUEST_HANDLE(xsm_op_t) u_xsm_op);
 
+extern long
+do_tmem_op(
+    XEN_GUEST_HANDLE(tmem_op_t) uops);
+
 #ifdef CONFIG_COMPAT
 
 extern int