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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 /include/linux/kvm_types.h | |
| parent | x86/kvm: Introduce kvm_(un)map_gfn() (diff) | |
| download | wireguard-linux-917248144db5d7320655dbb41d3af0b8a0f3d589.tar.xz wireguard-linux-917248144db5d7320655dbb41d3af0b8a0f3d589.zip | |
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 'include/linux/kvm_types.h')
| -rw-r--r-- | include/linux/kvm_types.h | 9 |
1 files changed, 8 insertions, 1 deletions
diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h index 1c88e69db3d9..68e84cf42a3f 100644 --- a/include/linux/kvm_types.h +++ b/include/linux/kvm_types.h @@ -18,7 +18,7 @@ struct kvm_memslots; enum kvm_mr_change; -#include <asm/types.h> +#include <linux/types.h> /* * Address types: @@ -51,4 +51,11 @@ struct gfn_to_hva_cache { struct kvm_memory_slot *memslot; }; +struct gfn_to_pfn_cache { + u64 generation; + gfn_t gfn; + kvm_pfn_t pfn; + bool dirty; +}; + #endif /* __KVM_TYPES_H__ */ |