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authorJeremy Fitzhardinge <jeremy@goop.org>2009-05-07 11:56:44 -0700
committerIngo Molnar <mingo@elte.hu>2009-05-08 10:49:11 +0200
commit33df4db04a79660150e1948e3296eeb451ac121b (patch)
tree6245453d81b04528cac33b53dea506e6b4e94d83
parent6407df5ca54a511054200a1eb23f78f723ca1de4 (diff)
downloadlinux-stericsson-33df4db04a79660150e1948e3296eeb451ac121b.tar.gz
x86: xen, i386: reserve Xen pagetables
The Xen pagetables are no longer implicitly reserved as part of the other i386_start_kernel reservations, so make sure we explicitly reserve them. This prevents them from being released into the general kernel free page pool and reused. [ Impact: fix Xen guest crash ] Also-Bisected-by: Bryan Donlan <bdonlan@gmail.com> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> Cc: Xen-devel <xen-devel@lists.xensource.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> LKML-Reference: <4A032EEC.30509@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
-rw-r--r--arch/x86/xen/mmu.c5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c
index 9842b1212407..e25a78e1113a 100644
--- a/arch/x86/xen/mmu.c
+++ b/arch/x86/xen/mmu.c
@@ -1794,6 +1794,11 @@ __init pgd_t *xen_setup_kernel_pagetable(pgd_t *pgd,
pin_pagetable_pfn(MMUEXT_PIN_L3_TABLE, PFN_DOWN(__pa(swapper_pg_dir)));
+ reserve_early(__pa(xen_start_info->pt_base),
+ __pa(xen_start_info->pt_base +
+ xen_start_info->nr_pt_frames * PAGE_SIZE),
+ "XEN PAGETABLES");
+
return swapper_pg_dir;
}
#endif /* CONFIG_X86_64 */