linux-kernel - [PATCH 2/5] Revert "KVM: MMU: Mark sp mmio cached when creating mmio spte"

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Date:	Fri, 15 Mar 2013 23:27:37 +0800
From:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
To:	Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
CC:	Marcelo Tosatti <mtosatti@...hat.com>,
	Gleb Natapov <gleb@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>, KVM <kvm@...r.kernel.org>
Subject: [PATCH 2/5] Revert "KVM: MMU: Mark sp mmio cached when creating mmio
 spte"

This reverts commit 95b0430d1a53541076ffbaf453f8b49a547cceba.
Will use a better way to zap all mmio shadow pages

Signed-off-by: Xiao Guangrong <xiaoguangrong@...ux.vnet.ibm.com>
---
 arch/x86/include/asm/kvm_host.h |    1 -
 arch/x86/kvm/mmu.c              |    3 ---
 2 files changed, 0 insertions(+), 4 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 9b75cae..ef7f4a5 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -230,7 +230,6 @@ struct kvm_mmu_page {
 #endif

 	int write_flooding_count;
-	bool mmio_cached;
 };

 struct kvm_pio_request {
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index de45ec1..fdacabb 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -199,11 +199,8 @@ EXPORT_SYMBOL_GPL(kvm_mmu_set_mmio_spte_mask);

 static void mark_mmio_spte(u64 *sptep, u64 gfn, unsigned access)
 {
-	struct kvm_mmu_page *sp =  page_header(__pa(sptep));
-
 	access &= ACC_WRITE_MASK | ACC_USER_MASK;

-	sp->mmio_cached = true;
 	trace_mark_mmio_spte(sptep, gfn, access);
 	mmu_spte_set(sptep, shadow_mmio_mask | access | gfn << PAGE_SHIFT);
 }
-- 
1.7.7.6

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