Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758938Ab2FUIuP (ORCPT ); Thu, 21 Jun 2012 04:50:15 -0400 Received: from tama500.ecl.ntt.co.jp ([129.60.39.148]:38899 "EHLO tama500.ecl.ntt.co.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758885Ab2FUIuM (ORCPT ); Thu, 21 Jun 2012 04:50:12 -0400 Date: Thu, 21 Jun 2012 17:49:58 +0900 From: Takuya Yoshikawa To: avi@redhat.com, mtosatti@redhat.com Cc: agraf@suse.de, paulus@samba.org, aarcange@redhat.com, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, linux-kernel@vger.kernel.org, takuya.yoshikawa@gmail.com Subject: [PATCH 2/6] KVM: Introduce hva_to_gfn_memslot() for kvm_handle_hva() Message-Id: <20120621174958.cf4f1cf0.yoshikawa.takuya@oss.ntt.co.jp> In-Reply-To: <20120621174842.22779780.yoshikawa.takuya@oss.ntt.co.jp> References: <20120621174842.22779780.yoshikawa.takuya@oss.ntt.co.jp> X-Mailer: Sylpheed 3.1.0 (GTK+ 2.24.4; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2546 Lines: 72 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 --- 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 27ac8a4..2e25d17 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/