linux-kernel - [PATCH 3/7] KVM: MMU: set access bit for direct mapping

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Message-ID: <4CA06C4C.1070000@cn.fujitsu.com>
Date:	Mon, 27 Sep 2010 18:05:00 +0800
From:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
To:	Avi Kivity <avi@...hat.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: [PATCH 3/7] KVM: MMU: set access bit for direct mapping

Set access bit while setup up direct page table if it's nonpaing or npt enabled,
it's good for CPU's speculate access

Xiao Guangrong <xiaoguangrong@...fujitsu.com>
---
 arch/x86/kvm/mmu.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 3630046..88203fa 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -2240,7 +2240,8 @@ static int __direct_map(struct kvm_vcpu *vcpu, gpa_t v, int write,
 			__set_spte(iterator.sptep,
 				   __pa(sp->spt)
 				   | PT_PRESENT_MASK | PT_WRITABLE_MASK
-				   | shadow_user_mask | shadow_x_mask);
+				   | shadow_user_mask | shadow_x_mask
+				   | shadow_accessed_mask);
 		}
 	}
 	return pt_write;
-- 
1.7.0.4

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