From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xiao Guangrong Subject: [PATCH 09/15] KVM: MTRR: introduce var_mtrr_range Date: Sat, 30 May 2015 18:59:20 +0800 Message-ID: <1432983566-15773-10-git-send-email-guangrong.xiao@linux.intel.com> References: <1432983566-15773-1-git-send-email-guangrong.xiao@linux.intel.com> Cc: gleb@kernel.org, mtosatti@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Xiao Guangrong To: pbonzini@redhat.com Return-path: Received: from mga11.intel.com ([192.55.52.93]:40825 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757781AbbE3K7q (ORCPT ); Sat, 30 May 2015 06:59:46 -0400 In-Reply-To: <1432983566-15773-1-git-send-email-guangrong.xiao@linux.intel.com> Sender: kvm-owner@vger.kernel.org List-ID: It gets the range for the specified variable MTRR Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mtrr.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/arch/x86/kvm/mtrr.c b/arch/x86/kvm/mtrr.c index 888441e..aeb9767 100644 --- a/arch/x86/kvm/mtrr.c +++ b/arch/x86/kvm/mtrr.c @@ -217,10 +217,21 @@ static int fixed_msr_to_range_index(u32 msr) return 0; } +static void var_mtrr_range(struct kvm_mtrr_range *range, u64 *start, u64 *end) +{ + u64 mask; + + *start = range->base & PAGE_MASK; + + mask = range->mask & PAGE_MASK; + mask |= ~0ULL << boot_cpu_data.x86_phys_bits; + *end = ((*start & mask) | ~mask) + 1; +} + static void update_mtrr(struct kvm_vcpu *vcpu, u32 msr) { struct kvm_mtrr *mtrr_state = &vcpu->arch.mtrr_state; - gfn_t start, end, mask; + gfn_t start, end; int index; if (msr == MSR_IA32_CR_PAT || !tdp_enabled || @@ -244,11 +255,7 @@ static void update_mtrr(struct kvm_vcpu *vcpu, u32 msr) default: /* variable range MTRRs. */ index = (msr - 0x200) / 2; - start = mtrr_state->var_ranges[index].base & PAGE_MASK; - mask = mtrr_state->var_ranges[index].mask & PAGE_MASK; - mask |= ~0ULL << cpuid_maxphyaddr(vcpu); - - end = ((start & mask) | ~mask) + 1; + var_mtrr_range(&mtrr_state->var_ranges[index], &start, &end); } do_zap: -- 2.1.0