ia64/xen-unstable

changeset 17854:02b6977de4b5

hvm: Fix max_mapped_pfn when using 2MB super pages.

Fixes booting Linux guest allocated more than 4G memory.
- The p2m table will track the max_mapped_pfn, and while doing
p2m_gfn_to_mfn(), if the gfn is higher than max_mapped_pfn, the
function will return _mfn(INVALID_MFN). This makes the Linux guest
kernel panic.

Signed-off-by: Xu Dongxiao <dongxiao.xu@intel.com>
author Keir Fraser <keir.fraser@citrix.com>
date Fri Jun 13 09:56:49 2008 +0100 (2008-06-13)
parents 8a0415fac759
children cb514522dab2
files xen/arch/x86/mm/p2m.c
line diff
     1.1 --- a/xen/arch/x86/mm/p2m.c	Fri Jun 13 09:54:03 2008 +0100
     1.2 +++ b/xen/arch/x86/mm/p2m.c	Fri Jun 13 09:56:49 2008 +0100
     1.3 @@ -323,7 +323,7 @@ p2m_set_entry(struct domain *d, unsigned
     1.4  
     1.5      /* Track the highest gfn for which we have ever had a valid mapping */
     1.6      if ( mfn_valid(mfn) && (gfn > d->arch.p2m->max_mapped_pfn) )
     1.7 -        d->arch.p2m->max_mapped_pfn = gfn;
     1.8 +        d->arch.p2m->max_mapped_pfn = gfn + (1UL << page_order) - 1;
     1.9  
    1.10      if ( iommu_enabled && (is_hvm_domain(d) || need_iommu(d)) )
    1.11      {