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| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2019-12-05 01:30:51 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2020-04-29 16:31:19 +0200 |
| commit | ccfc73e56da7c8e68ab6a543c5b8cd0b83c9e9bb (patch) | |
| tree | 5de4d00496ea683cef6960cb7ef8fd0c7ed451c3 /include/linux/dynamic_debug.h | |
| parent | e36d68ec5090599058650152547d4a58ef3d79a0 (diff) | |
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>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Ben Hutchings <ben.hutchings@codethink.co.uk>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include/linux/dynamic_debug.h')
0 files changed, 0 insertions, 0 deletions