Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751902AbbHEEKY (ORCPT ); Wed, 5 Aug 2015 00:10:24 -0400 Received: from mga14.intel.com ([192.55.52.115]:45893 "EHLO mga14.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751639AbbHEEKU (ORCPT ); Wed, 5 Aug 2015 00:10:20 -0400 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.15,613,1432623600"; d="scan'208";a="742410692" From: Xiao Guangrong To: pbonzini@redhat.com Cc: gleb@kernel.org, mtosatti@redhat.com, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, ru.pchel@gmail.com, Xiao Guangrong Subject: [PATCH v2 7/9] KVM: MMU: introduce is_shadow_zero_bits_set() Date: Wed, 5 Aug 2015 12:04:25 +0800 Message-Id: <1438747467-25425-8-git-send-email-guangrong.xiao@linux.intel.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1438747467-25425-1-git-send-email-guangrong.xiao@linux.intel.com> References: <1438747467-25425-1-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 Content-Length: 2145 Lines: 63 We have the same data struct to check reserved bits on guest page tables and shadow page tables, split is_rsvd_bits_set() so that the logic can be shared between these two paths Signed-off-by: Xiao Guangrong --- arch/x86/kvm/mmu.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index edf1ec5..e6a7ed0 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -3268,6 +3268,25 @@ static gpa_t nonpaging_gva_to_gpa_nested(struct kvm_vcpu *vcpu, gva_t vaddr, return vcpu->arch.nested_mmu.translate_gpa(vcpu, vaddr, access, exception); } +static bool +__is_rsvd_bits_set(struct rsvd_bits_validate *rsvd_check, u64 pte, int level) +{ + int bit7 = (pte >> 7) & 1, low6 = pte & 0x3f; + + return (pte & rsvd_check->rsvd_bits_mask[bit7][level-1]) | + ((rsvd_check->bad_mt_xwr & (1ull << low6)) != 0); +} + +static bool is_rsvd_bits_set(struct kvm_mmu *mmu, u64 gpte, int level) +{ + return __is_rsvd_bits_set(&mmu->guest_rsvd_check, gpte, level); +} + +static bool is_shadow_zero_bits_set(struct kvm_mmu *mmu, u64 spte, int level) +{ + return __is_rsvd_bits_set(&mmu->shadow_zero_check, spte, level); +} + static bool quickly_check_mmio_pf(struct kvm_vcpu *vcpu, u64 addr, bool direct) { if (direct) @@ -3546,15 +3565,6 @@ static inline bool is_last_gpte(struct kvm_mmu *mmu, unsigned level, unsigned gp return mmu->last_pte_bitmap & (1 << index); } -static bool is_rsvd_bits_set(struct kvm_mmu *mmu, u64 gpte, int level) -{ - struct rsvd_bits_validate *rsvd_check = &mmu->guest_rsvd_check; - int bit7 = (gpte >> 7) & 1, low6 = gpte & 0x3f; - - return (gpte & rsvd_check->rsvd_bits_mask[bit7][level-1]) | - ((rsvd_check->bad_mt_xwr & (1ull << low6)) != 0); -} - #define PTTYPE_EPT 18 /* arbitrary */ #define PTTYPE PTTYPE_EPT #include "paging_tmpl.h" -- 2.1.0 -- 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/