[PATCH v3 7/11] KVM: MMU: introduce gfn_to_hva_many() function
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From: Xiao Guangrong on 30 Jun 2010 04:20 This function not only return the gfn's hva but also the page number after @gfn in the slot It's used in the later patch Signed-off-by: Xiao Guangrong <xiaoguangrong(a)cn.fujitsu.com> --- include/linux/kvm_host.h | 1 + virt/kvm/kvm_main.c | 13 ++++++++++++- 2 files changed, 13 insertions(+), 1 deletions(-) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 515fefd..8f7af32 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -289,6 +289,7 @@ void kvm_disable_largepages(void); void kvm_arch_flush_shadow(struct kvm *kvm); struct page *gfn_to_page(struct kvm *kvm, gfn_t gfn); +unsigned long gfn_to_hva_many(struct kvm *kvm, gfn_t gfn, int *entry); unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn); void kvm_release_page_clean(struct page *page); void kvm_release_page_dirty(struct page *page); diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 60bb3d5..a007889 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -913,15 +913,26 @@ static unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn) return slot->userspace_addr + (gfn - slot->base_gfn) * PAGE_SIZE; } -unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) +unsigned long gfn_to_hva_many(struct kvm *kvm, gfn_t gfn, int *entry) { struct kvm_memory_slot *slot; slot = gfn_to_memslot(kvm, gfn); + if (!slot || slot->flags & KVM_MEMSLOT_INVALID) return bad_hva(); + + if (entry) + *entry = slot->npages - (gfn - slot->base_gfn); + return gfn_to_hva_memslot(slot, gfn); } +EXPORT_SYMBOL_GPL(gfn_to_hva_many); + +unsigned long gfn_to_hva(struct kvm *kvm, gfn_t gfn) +{ + return gfn_to_hva_many(kvm, gfn, NULL); +} EXPORT_SYMBOL_GPL(gfn_to_hva); static pfn_t hva_to_pfn(struct kvm *kvm, unsigned long addr, bool atomic) -- 1.6.1.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |