From d19a748b1c42b133e9263e9023c1d162efa6f4ad Mon Sep 17 00:00:00 2001 From: Takuya Yoshikawa Date: Mon, 2 Jul 2012 17:54:30 +0900 Subject: KVM: Introduce hva_to_gfn_memslot() for kvm_handle_hva() This restricts hva handling in mmu code and makes it easier to extend kvm_handle_hva() so that it can treat a range of addresses later in this patch series. Signed-off-by: Takuya Yoshikawa Cc: Alexander Graf Cc: Paul Mackerras Signed-off-by: Marcelo Tosatti --- include/linux/kvm_host.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/linux/kvm_host.h') diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index e3c86f8c86c9..6f6c18a03c50 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -740,6 +740,14 @@ static inline gfn_t gfn_to_index(gfn_t gfn, gfn_t base_gfn, int level) (base_gfn >> KVM_HPAGE_GFN_SHIFT(level)); } +static inline gfn_t +hva_to_gfn_memslot(unsigned long hva, struct kvm_memory_slot *slot) +{ + gfn_t gfn_offset = (hva - slot->userspace_addr) >> PAGE_SHIFT; + + return slot->base_gfn + gfn_offset; +} + static inline unsigned long gfn_to_hva_memslot(struct kvm_memory_slot *slot, gfn_t gfn) { -- cgit v1.2.3