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Message-ID: <4DEE20CA.90206@cn.fujitsu.com>
Date: Tue, 07 Jun 2011 20:59:54 +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 03/15] KVM: x86: avoid unnecessarily guest page table walking
We already get the guest physical address, so use it to read guest data
directly to avoid walking guest page table again
Signed-off-by: Xiao Guangrong <xiaoguangrong@...fujitsu.com>
---
arch/x86/kvm/x86.c | 3 +--
1 files changed, 1 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 694538a..8be9ff6 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3930,8 +3930,7 @@ static int emulator_read_emulated(struct x86_emulate_ctxt *ctxt,
if ((gpa & PAGE_MASK) == APIC_DEFAULT_PHYS_BASE)
goto mmio;
- if (kvm_read_guest_virt(ctxt, addr, val, bytes, exception)
- == X86EMUL_CONTINUE)
+ if (!kvm_read_guest(vcpu->kvm, gpa, val, bytes))
return X86EMUL_CONTINUE;
mmio:
--
1.7.4.4
--
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