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| author | Boris Ostrovsky <boris.ostrovsky@oracle.com> | 2019-12-05 01:30:51 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-01-30 18:45:55 +0100 |
| commit | 917248144db5d7320655dbb41d3af0b8a0f3d589 (patch) | |
| tree | 4c865f9aeb61137847ce9d283bc33febded17714 /arch/x86/kvm/mmu_audit.c | |
| parent | 1eff70a9abd46f175defafd29bc17ad456f398a7 (diff) | |
x86/kvm: Cache gfn to pfn translation
__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>
Diffstat (limited to 'arch/x86/kvm/mmu_audit.c')
0 files changed, 0 insertions, 0 deletions