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| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2019-12-05 04:30:51 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-02-11 15:35:40 +0300 |
| commit | f7c1a6c67ff36532f1b0b339e3aae7701a2c0b1e (patch) | |
| tree | 00a88bed00532791eff4d842f3bc7919172fdd65 /drivers | |
| parent | d71eef9fcc0b81fd56e59afd305a215d81239894 (diff) | |
| download | linux-f7c1a6c67ff36532f1b0b339e3aae7701a2c0b1e.tar.xz | |
x86/kvm: Cache gfn to pfn translation
commit 917248144db5d7320655dbb41d3af0b8a0f3d589 upstream.
__kvm_map_gfn()'s call to gfn_to_pfn_memslot() is
* relatively expensive
* in certain cases (such as when done from atomic context) cannot be called
Stashing gfn-to-pfn mapping should help with both cases.
This is part of CVE-2019-3016.
Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Joao Martins <joao.m.martins@oracle.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
0 files changed, 0 insertions, 0 deletions