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 <yoshikawa.takuya@xxxxxxxxxxxxx>
Cc: Alexander Graf <agraf@xxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
---
arch/powerpc/kvm/book3s_64_mmu_hv.c | 6 +++---
arch/x86/kvm/mmu.c | 3 +--
include/linux/kvm_host.h | 8 ++++++++
3 files changed, 12 insertions(+), 5 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index d03eb6f..3703755 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -772,10 +772,10 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
end = start + (memslot->npages << PAGE_SHIFT);
if (hva >= start && hva < end) {
- gfn_t gfn_offset = (hva - start) >> PAGE_SHIFT;
+ gfn_t gfn = hva_to_gfn_memslot(hva, memslot);
+ gfn_t gfn_offset = gfn - memslot->base_gfn;
- ret = handler(kvm, &memslot->rmap[gfn_offset],
- memslot->base_gfn + gfn_offset);
+ ret = handler(kvm, &memslot->rmap[gfn_offset], gfn);
retval |= ret;
}
}
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index d3e7e6a..b898bec 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1202,8 +1202,7 @@ static int kvm_handle_hva(struct kvm *kvm, unsigned long hva,
end = start + (memslot->npages << PAGE_SHIFT);
if (hva >= start && hva < end) {
- gfn_t gfn_offset = (hva - start) >> PAGE_SHIFT;
- gfn_t gfn = memslot->base_gfn + gfn_offset;
+ gfn_t gfn = hva_to_gfn_memslot(hva, memslot);
ret = 0;
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index c7f7787..c0dd2e9 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)
{
--
1.7.5.4
--
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