debuggers.hg

changeset 20938:d311d1efc25e

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x86: make max_mfn returned from XENMEM_machphys_mapping dynamic

This helps debugging in the guest kernels, as then MFNs there can then
be range checked based on the reported value.

Signed-off-by: Jan Beulich <jbeulich@novell.com>
author Keir Fraser <keir.fraser@citrix.com>
date Thu Feb 04 08:53:49 2010 +0000 (2010-02-04)
parents 91358472d8c4
children 845d04d505d0
files xen/arch/x86/mm.c
line diff
     1.1 --- a/xen/arch/x86/mm.c	Thu Feb 04 08:53:16 2010 +0000
     1.2 +++ b/xen/arch/x86/mm.c	Thu Feb 04 08:53:49 2010 +0000
     1.3 @@ -4456,12 +4456,14 @@ long arch_memory_op(int op, XEN_GUEST_HA
     1.4  
     1.5      case XENMEM_machphys_mapping:
     1.6      {
     1.7 -        static const struct xen_machphys_mapping mapping = {
     1.8 +        struct xen_machphys_mapping mapping = {
     1.9              .v_start = MACH2PHYS_VIRT_START,
    1.10              .v_end   = MACH2PHYS_VIRT_END,
    1.11              .max_mfn = MACH2PHYS_NR_ENTRIES - 1
    1.12          };
    1.13  
    1.14 +        if ( !mem_hotplug )
    1.15 +            mapping.max_mfn = max_page - 1;
    1.16          if ( copy_to_guest(arg, &mapping, 1) )
    1.17              return -EFAULT;
    1.18