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From: Xiao Guangrong <guangrong.xiao@linux.intel.com>
To: pbonzini@redhat.com
Cc: gleb@kernel.org, mtosatti@redhat.com, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org,
	Xiao Guangrong <guangrong.xiao@linux.intel.com>
Subject: [PATCH v2 9/9] KVM: x86: do not reset mmu if CR0.CD and CR0.NW are changed
Date: Tue, 12 May 2015 10:32:33 +0800	[thread overview]
Message-ID: <1431397953-16642-10-git-send-email-guangrong.xiao@linux.intel.com> (raw)
In-Reply-To: <1431397953-16642-1-git-send-email-guangrong.xiao@linux.intel.com>

CR0.CD and CR0.NW are not used by shadow page table so that need
not adjust mmu if these two bit are changed

Signed-off-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
---
 arch/x86/kvm/x86.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index a527dd0..a82d26f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -572,8 +572,7 @@ out:
 int kvm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
 {
 	unsigned long old_cr0 = kvm_read_cr0(vcpu);
-	unsigned long update_bits = X86_CR0_PG | X86_CR0_WP |
-				    X86_CR0_CD | X86_CR0_NW;
+	unsigned long update_bits = X86_CR0_PG | X86_CR0_WP;
 
 	cr0 |= X86_CR0_ET;
 
-- 
2.1.0


      parent reply	other threads:[~2015-05-12  2:36 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-05-12  2:32 [PATCH v2 0/9] KVM: MTRR fixes and some cleanups Xiao Guangrong
2015-05-12  2:32 ` [PATCH v2 1/9] KVM: MMU: fix decoding cache type from MTRR Xiao Guangrong
2015-05-12  2:32 ` [PATCH v2 2/9] KVM: MMU: introduce for_each_rmap_spte() Xiao Guangrong
2015-05-12  8:08   ` Paolo Bonzini
2015-05-12  9:36     ` Xiao Guangrong
2015-05-12  2:32 ` [PATCH v2 3/9] KVM: MMU: introduce for_each_slot_rmap_range Xiao Guangrong
2015-05-12  8:22   ` Paolo Bonzini
2015-05-12  9:38     ` Xiao Guangrong
2015-05-12  2:32 ` [PATCH v2 4/9] KVM: MMU: introduce slot_handle_level_range() and its helpers Xiao Guangrong
2015-05-12  8:22   ` Paolo Bonzini
2015-05-12  9:37     ` Xiao Guangrong
2015-05-12  2:32 ` [PATCH v2 5/9] KVM: MMU: use slot_handle_level and its helper to clean up the code Xiao Guangrong
2015-05-12  2:32 ` [PATCH v2 6/9] KVM: MMU: introduce kvm_zap_rmapp Xiao Guangrong
2015-05-12  2:32 ` [PATCH v2 7/9] KVM: MMU: introduce kvm_zap_gfn_range Xiao Guangrong
2015-05-12  2:32 ` [PATCH v2 8/9] KVM: MMU: fix MTRR update Xiao Guangrong
2015-05-12  2:32 ` Xiao Guangrong [this message]

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