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| author | Paolo Bonzini <pbonzini@redhat.com> | 2017-02-03 20:32:28 -0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-02-16 18:42:33 +0100 |
| commit | 5a2d4365d2c39e8a3ff3cbee3af123a23aebdb9c (patch) | |
| tree | 651094be5f369772587d8778dc7b44a08d76cc5d /virt | |
| parent | 47c0152e0f8bd325869417e0aaff032e62bcf6f2 (diff) | |
| download | linux-5a2d4365d2c39e8a3ff3cbee3af123a23aebdb9c.tar.gz linux-5a2d4365d2c39e8a3ff3cbee3af123a23aebdb9c.tar.bz2 linux-5a2d4365d2c39e8a3ff3cbee3af123a23aebdb9c.zip | |
KVM: only retrieve memslots once when initializing cache
This will make it a bit simpler to handle multiple address spaces
in gfn_to_hva_cache.
Reviewed-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 482612b4e496..e21bac7ed5d3 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1937,10 +1937,10 @@ int kvm_vcpu_write_guest(struct kvm_vcpu *vcpu, gpa_t gpa, const void *data, } EXPORT_SYMBOL_GPL(kvm_vcpu_write_guest); -int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, - gpa_t gpa, unsigned long len) +static int __kvm_gfn_to_hva_cache_init(struct kvm_memslots *slots, + struct gfn_to_hva_cache *ghc, + gpa_t gpa, unsigned long len) { - struct kvm_memslots *slots = kvm_memslots(kvm); int offset = offset_in_page(gpa); gfn_t start_gfn = gpa >> PAGE_SHIFT; gfn_t end_gfn = (gpa + len - 1) >> PAGE_SHIFT; @@ -1950,7 +1950,7 @@ int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, ghc->gpa = gpa; ghc->generation = slots->generation; ghc->len = len; - ghc->memslot = gfn_to_memslot(kvm, start_gfn); + ghc->memslot = __gfn_to_memslot(slots, start_gfn); ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, NULL); if (!kvm_is_error_hva(ghc->hva) && nr_pages_needed <= 1) { ghc->hva += offset; @@ -1960,7 +1960,7 @@ int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, * verify that the entire region is valid here. */ while (start_gfn <= end_gfn) { - ghc->memslot = gfn_to_memslot(kvm, start_gfn); + ghc->memslot = __gfn_to_memslot(slots, start_gfn); ghc->hva = gfn_to_hva_many(ghc->memslot, start_gfn, &nr_pages_avail); if (kvm_is_error_hva(ghc->hva)) @@ -1972,6 +1972,13 @@ int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, } return 0; } + +int kvm_gfn_to_hva_cache_init(struct kvm *kvm, struct gfn_to_hva_cache *ghc, + gpa_t gpa, unsigned long len) +{ + struct kvm_memslots *slots = kvm_memslots(kvm); + return __kvm_gfn_to_hva_cache_init(slots, ghc, gpa, len); +} EXPORT_SYMBOL_GPL(kvm_gfn_to_hva_cache_init); int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, @@ -1984,7 +1991,7 @@ int kvm_write_guest_offset_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, BUG_ON(len + offset > ghc->len); if (slots->generation != ghc->generation) - kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len); + __kvm_gfn_to_hva_cache_init(slots, ghc, ghc->gpa, ghc->len); if (unlikely(!ghc->memslot)) return kvm_write_guest(kvm, gpa, data, len); @@ -2017,7 +2024,7 @@ int kvm_read_guest_cached(struct kvm *kvm, struct gfn_to_hva_cache *ghc, BUG_ON(len > ghc->len); if (slots->generation != ghc->generation) - kvm_gfn_to_hva_cache_init(kvm, ghc, ghc->gpa, ghc->len); + __kvm_gfn_to_hva_cache_init(slots, ghc, ghc->gpa, ghc->len); if (unlikely(!ghc->memslot)) return kvm_read_guest(kvm, ghc->gpa, data, len); |