1.1 --- a/tools/libxc/xc_domain.c	Thu Sep 08 17:35:44 2005 +0000
     1.2 +++ b/tools/libxc/xc_domain.c	Thu Sep 08 17:36:23 2005 +0000
     1.3 @@ -262,28 +262,66 @@ int xc_domain_setmaxmem(int xc_handle,
     1.4  
     1.5  int xc_domain_memory_increase_reservation(int xc_handle,
     1.6                                            u32 domid, 
     1.7 -                                          unsigned long mem_kb,
     1.8 +                                          unsigned long nr_extents,
     1.9                                            unsigned int extent_order,
    1.10 -                                          unsigned int address_bits)
    1.11 +                                          unsigned int address_bits,
    1.12 +					  unsigned long *extent_start)
    1.13  {
    1.14      int err;
    1.15 -    unsigned int npages = mem_kb / (PAGE_SIZE/1024);
    1.16      struct xen_memory_reservation reservation = {
    1.17 -        .nr_extents   = npages,
    1.18 -        .extent_order = extent_order,
    1.19 +        .extent_start = extent_start, /* may be NULL */
    1.20 +        .nr_extents   = nr_extents,
    1.21 +        .extent_order = extent_order,  
    1.22          .address_bits = address_bits,
    1.23          .domid        = domid
    1.24      };
    1.25  
    1.26      err = xc_memory_op(xc_handle, XENMEM_increase_reservation, &reservation);
    1.27 -    if (err == npages)
    1.28 +    if (err == nr_extents)
    1.29          return 0;
    1.30  
    1.31      if (err > 0) {
    1.32 -        fprintf(stderr,"Failed alocation for dom %d : %d pages order %d addr_bits %d\n",
    1.33 -                                 domid, npages, extent_order, address_bits);
    1.34 +        fprintf(stderr,"Failed alocation for dom %d : %ld pages order %d addr_bits %d\n",
    1.35 +                                 domid, nr_extents, extent_order, address_bits);
    1.36          errno = ENOMEM;
    1.37          err = -1;
    1.38      }
    1.39      return err;
    1.40  }
    1.41 +
    1.42 +int xc_domain_memory_decrease_reservation(int xc_handle,
    1.43 +                                          u32 domid, 
    1.44 +                                          unsigned long nr_extents,
    1.45 +                                          unsigned int extent_order,
    1.46 +					  unsigned long *extent_start)
    1.47 +{
    1.48 +    int err;
    1.49 +    struct xen_memory_reservation reservation = {
    1.50 +        .extent_start = extent_start, 
    1.51 +        .nr_extents   = nr_extents,
    1.52 +        .extent_order = extent_order,  
    1.53 +        .address_bits = 0,
    1.54 +        .domid        = domid
    1.55 +    };
    1.56 +
    1.57 +    if (extent_start == NULL)
    1.58 +    {
    1.59 +        fprintf(stderr,"decrease_reservation extent_start is NULL!\n");
    1.60 +        errno = EINVAL;
    1.61 +        err = -1;
    1.62 +	goto out;
    1.63 +    }
    1.64 +
    1.65 +    err = xc_memory_op(xc_handle, XENMEM_increase_reservation, &reservation);
    1.66 +    if (err == nr_extents)
    1.67 +        return 0;
    1.68 +
    1.69 +    if (err > 0) {
    1.70 +        fprintf(stderr,"Failed de-alocation for dom %d : %ld pages order %d\n",
    1.71 +                                 domid, nr_extents, extent_order);
    1.72 +        errno = EBUSY;
    1.73 +        err = -1;
    1.74 +    }
    1.75 +out:
    1.76 +    return err;
    1.77 +}

     2.1 --- a/tools/libxc/xc_linux_build.c	Thu Sep 08 17:35:44 2005 +0000
     2.2 +++ b/tools/libxc/xc_linux_build.c	Thu Sep 08 17:36:23 2005 +0000
     2.3 @@ -136,11 +136,24 @@ static int setup_pg_tables_pae(int xc_ha
     2.4  
     2.5      /* First allocate page for page dir. */
     2.6      ppt_alloc = (vpt_start - dsi_v_start) >> PAGE_SHIFT;
     2.7 +
     2.8 +    if ( page_array[ppt_alloc] > 0xfffff )
     2.9 +    {
    2.10 +	unsigned long nmfn;
    2.11 +	nmfn = xc_make_page_below_4G( xc_handle, dom, page_array[ppt_alloc] );
    2.12 +	if ( nmfn == 0 )
    2.13 +	{
    2.14 +	    fprintf(stderr, "Couldn't get a page below 4GB :-(\n");
    2.15 +	    goto error_out;
    2.16 +	}
    2.17 +	page_array[ppt_alloc] = nmfn;
    2.18 +    }
    2.19 +
    2.20      alloc_pt(l3tab, vl3tab);
    2.21      vl3e = &vl3tab[l3_table_offset_pae(dsi_v_start)];
    2.22      ctxt->ctrlreg[3] = l3tab;
    2.23  
    2.24 -    if(l3tab>0xfffff000)
    2.25 +    if(l3tab>0xfffff000ULL)
    2.26      {
    2.27          fprintf(stderr,"L3TAB = %llx above 4GB!\n",l3tab);
    2.28          goto error_out;

     3.1 --- a/tools/libxc/xc_linux_restore.c	Thu Sep 08 17:35:44 2005 +0000
     3.2 +++ b/tools/libxc/xc_linux_restore.c	Thu Sep 08 17:36:23 2005 +0000
     3.3 @@ -149,7 +149,7 @@ int xc_linux_restore(int xc_handle, int 
     3.4      }
     3.5  
     3.6      err = xc_domain_memory_increase_reservation(xc_handle, dom,
     3.7 -                                                nr_pfns * PAGE_SIZE / 1024, 0, 0); //FIX ME
     3.8 +                                                nr_pfns, 0, 0, NULL);
     3.9      if (err != 0) {
    3.10          ERR("Failed to increase reservation by %lx\n", 
    3.11              nr_pfns * PAGE_SIZE / 1024); 

     4.1 --- a/tools/libxc/xc_private.c	Thu Sep 08 17:35:44 2005 +0000
     4.2 +++ b/tools/libxc/xc_private.c	Thu Sep 08 17:36:23 2005 +0000
     4.3 @@ -427,3 +427,21 @@ int xc_version(int xc_handle, int cmd, v
     4.4  {
     4.5      return do_xen_version(xc_handle, cmd, arg);
     4.6  }
     4.7 +
     4.8 +unsigned long xc_make_page_below_4G(int xc_handle, u32 domid, 
     4.9 +				    unsigned long mfn)
    4.10 +{
    4.11 +    unsigned long new_mfn;
    4.12 +    if ( xc_domain_memory_decrease_reservation( 
    4.13 +	xc_handle, domid, 1, 0, &mfn ) != 1 )
    4.14 +    {
    4.15 +	fprintf(stderr,"xc_make_page_below_4G decrease failed. mfn=%lx\n",mfn);
    4.16 +	return 0;
    4.17 +    }
    4.18 +    if ( xc_domain_memory_increase_reservation( xc_handle, domid, 1, 0, 32, &new_mfn ) != 1 )
    4.19 +    {
    4.20 +	fprintf(stderr,"xc_make_page_below_4G increase failed. mfn=%lx\n",mfn);
    4.21 +	return 0;
    4.22 +    }
    4.23 +    return new_mfn;
    4.24 +}

     5.1 --- a/tools/libxc/xenctrl.h	Thu Sep 08 17:35:44 2005 +0000
     5.2 +++ b/tools/libxc/xenctrl.h	Thu Sep 08 17:36:23 2005 +0000
     5.3 @@ -387,9 +387,19 @@ int xc_domain_setmaxmem(int xc_handle,
     5.4  
     5.5  int xc_domain_memory_increase_reservation(int xc_handle,
     5.6                                            u32 domid, 
     5.7 -                                          unsigned long mem_kb,
     5.8 +                                          unsigned long nr_extents,
     5.9                                            unsigned int extent_order,
    5.10 -                                          unsigned int address_bits);
    5.11 +                                          unsigned int address_bits,
    5.12 +					  unsigned long *extent_start);
    5.13 +
    5.14 +int xc_domain_memory_decrease_reservation(int xc_handle,
    5.15 +                                          u32 domid, 
    5.16 +                                          unsigned long nr_extents,
    5.17 +                                          unsigned int extent_order,
    5.18 +					  unsigned long *extent_start);
    5.19 +
    5.20 +unsigned long xc_make_page_below_4G(int xc_handle, u32 domid, 
    5.21 +				    unsigned long mfn);
    5.22  
    5.23  typedef dom0_perfc_desc_t xc_perfc_desc_t;
    5.24  /* IMPORTANT: The caller is responsible for mlock()'ing the @desc array. */

     6.1 --- a/tools/python/xen/lowlevel/xc/xc.c	Thu Sep 08 17:35:44 2005 +0000
     6.2 +++ b/tools/python/xen/lowlevel/xc/xc.c	Thu Sep 08 17:36:23 2005 +0000
     6.3 @@ -842,6 +842,7 @@ static PyObject *pyxc_domain_memory_incr
     6.4      u32 dom;
     6.5      unsigned long mem_kb;
     6.6      unsigned int extent_order = 0 , address_bits = 0;
     6.7 +    unsigned long nr_extents;
     6.8  
     6.9      static char *kwd_list[] = { "dom", "mem_kb", "extent_order", "address_bits", NULL };
    6.10  
    6.11 @@ -849,8 +850,12 @@ static PyObject *pyxc_domain_memory_incr
    6.12                                        &dom, &mem_kb, &extent_order, &address_bits) )
    6.13          return NULL;
    6.14  
    6.15 +    /* round down to nearest power of 2. Assume callers using extent_order>0
    6.16 +       know what they are doing */
    6.17 +    nr_extents = (mem_kb / (XC_PAGE_SIZE/1024)) >> extent_order;
    6.18      if ( xc_domain_memory_increase_reservation(xc->xc_handle, dom, 
    6.19 -                                     mem_kb, extent_order, address_bits) )
    6.20 +					       nr_extents, extent_order, 
    6.21 +					       address_bits, NULL) )
    6.22          return PyErr_SetFromErrno(xc_error);
    6.23      
    6.24      Py_INCREF(zero);

     7.1 --- a/tools/python/xen/xend/image.py	Thu Sep 08 17:35:44 2005 +0000
     7.2 +++ b/tools/python/xen/xend/image.py	Thu Sep 08 17:36:23 2005 +0000
     7.3 @@ -160,8 +160,9 @@ class ImageHandler:
     7.4  
     7.5          try:
     7.6              # Give the domain some memory below 4GB
     7.7 -            lmem_kb = 4096
     7.8 -            xc.domain_memory_increase_reservation(dom, min(lmem_kb,mem_kb), 0, 32)
     7.9 +            lmem_kb = 0
    7.10 +            if lmem_kb > 0:
    7.11 +                xc.domain_memory_increase_reservation(dom, min(lmem_kb,mem_kb), 0, 32)
    7.12              if mem_kb > lmem_kb:
    7.13                  xc.domain_memory_increase_reservation(dom, mem_kb-lmem_kb, 0, 0)
    7.14          except: