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| author | Jan Beulich <jbeulich@suse.com> | 2013-05-02 16:34:21 +0200 |
|---|---|---|
| committer | Jan Beulich <jbeulich@suse.com> | 2013-05-02 16:34:21 +0200 |
| commit | 6cdc9be2a5f2a87b4504404fbf648d16d9503c19 (patch) | |
| tree | 57244e0df782cc38467cf1045314806967c72ba9 /xen/include/asm-x86/domain.h | |
| parent | 9626d1c1fafe2da5af6e59478c9e9db6d03144df (diff) | |
| download | xen-6cdc9be2a5f2a87b4504404fbf648d16d9503c19.tar.gz xen-6cdc9be2a5f2a87b4504404fbf648d16d9503c19.tar.bz2 xen-6cdc9be2a5f2a87b4504404fbf648d16d9503c19.zip | |
x86: make vcpu_destroy_pagetables() preemptible
... as it may take significant amounts of time.
The function, being moved to mm.c as the better home for it anyway, and
to avoid having to make a new helper function there non-static, is
given a "preemptible" parameter temporarily (until, in a subsequent
patch, its other caller is also being made capable of dealing with
preemption).
This is part of CVE-2013-1918 / XSA-45.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tim Deegan <tim@xen.org>
Diffstat (limited to 'xen/include/asm-x86/domain.h')
| -rw-r--r-- | xen/include/asm-x86/domain.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/xen/include/asm-x86/domain.h b/xen/include/asm-x86/domain.h index bdaf714ef6..83fbe58613 100644 --- a/xen/include/asm-x86/domain.h +++ b/xen/include/asm-x86/domain.h @@ -405,6 +405,7 @@ struct arch_vcpu pagetable_t guest_table_user; /* (MFN) x86/64 user-space pagetable */ pagetable_t guest_table; /* (MFN) guest notion of cr3 */ + struct page_info *old_guest_table; /* partially destructed pagetable */ /* guest_table holds a ref to the page, and also a type-count unless * shadow refcounts are in use */ pagetable_t shadow_table[4]; /* (MFN) shadow(s) of guest */ |