diff options
| author | Andrew Honig <ahonig@google.com> | 2013-03-29 09:35:21 -0700 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-04-07 13:05:35 +0300 |
| commit | 8f964525a121f2ff2df948dac908dcc65be21b5b (patch) | |
| tree | 1986d7677a1cae8f639c91812da2d8c6ed5bba26 /include | |
| parent | 09a6e1f4ad32243989b30485f78985c0923284cd (diff) | |
KVM: Allow cross page reads and writes from cached translations.
This patch adds support for kvm_gfn_to_hva_cache_init functions for
reads and writes that will cross a page. If the range falls within
the same memslot, then this will be a fast operation. If the range
is split between two memslots, then the slower kvm_read_guest and
kvm_write_guest are used.
Tested: Test against kvm_clock unit tests.
Signed-off-by: Andrew Honig <ahonig@google.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm_host.h | 2 | ||||
| -rw-r--r-- | include/linux/kvm_types.h | 1 |
2 files changed, 2 insertions, 1 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index cad77fe09d7..c1395825192 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -518,7 +518,7 @@ int kvm_write_guest(struct kvm *kvm, gpa_t gpa, const void *data, int kvm_write_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, void *data, unsigned long len); int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, - gpa_t gpa); + gpa_t gpa, unsigned long len); int kvm_clear_guest_page(struct kvm *kvm, gfn_t gfn, int offset, int len); int kvm_clear_guest(struct kvm *kvm, gpa_t gpa, unsigned long len); struct kvm_memory_slot *gfn_to_memslot(struct kvm *kvm, gfn_t gfn); diff --git a/include/linux/kvm_types.h b/include/linux/kvm_types.h index fa7cc7244cb..b0bcce0ddc9 100644 --- a/include/linux/kvm_types.h +++ b/include/linux/kvm_types.h @@ -71,6 +71,7 @@ struct gfn_to_hva_cache { u64 generation; gpa_t gpa; unsigned long hva; + unsigned long len; struct kvm_memory_slot *memslot; }; |