From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755432AbbFOJCl (ORCPT ); Mon, 15 Jun 2015 05:02:41 -0400 Received: from mga09.intel.com ([134.134.136.24]:23340 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754350AbbFOJAV (ORCPT ); Mon, 15 Jun 2015 05:00:21 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.13,617,1427785200"; d="scan'208";a="508417192" From: Xiao Guangrong To: pbonzini@redhat.com Cc: gleb@kernel.org, mtosatti@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, dmatlack@google.com, Xiao Guangrong Subject: [PATCH v2 12/15] KVM: MTRR: introduce fixed_mtrr_addr_* functions Date: Mon, 15 Jun 2015 16:55:32 +0800 Message-Id: <1434358535-19923-13-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1434358535-19923-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1434358535-19923-1-git-send-email-guangrong.xiao@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Two functions are introduced: - fixed_mtrr_addr_to_seg() translates the address to the fixed MTRR segment - fixed_mtrr_addr_seg_to_range_index() translates the address to the index of kvm_mtrr.fixed_ranges[] They will be used in the later patch Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mtrr.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) diff --git a/arch/x86/kvm/mtrr.c b/arch/x86/kvm/mtrr.c index c06ec13..e5e16a1 100644 --- a/arch/x86/kvm/mtrr.c +++ b/arch/x86/kvm/mtrr.c @@ -241,6 +241,31 @@ static int fixed_msr_to_range_index(u32 msr) return fixed_mtrr_seg_unit_range_index(seg, unit); } +static int fixed_mtrr_addr_to_seg(u64 addr) +{ + struct fixed_mtrr_segment *mtrr_seg; + int seg, seg_num = ARRAY_SIZE(fixed_seg_table); + + for (seg = 0; seg < seg_num; seg++) { + mtrr_seg = &fixed_seg_table[seg]; + if (mtrr_seg->start >= addr && addr < mtrr_seg->end) + return seg; + } + + return -1; +} + +static int fixed_mtrr_addr_seg_to_range_index(u64 addr, int seg) +{ + struct fixed_mtrr_segment *mtrr_seg; + int index; + + mtrr_seg = &fixed_seg_table[seg]; + index = mtrr_seg->range_start; + index += (addr - mtrr_seg->start) / mtrr_seg->range_size; + return index; +} + static void var_mtrr_range(struct kvm_mtrr_range *range, u64 *start, u64 *end) { u64 mask; -- 2.1.0