From: "Yang, Sheng" <sheng.yang@intel.com>
To: Avi Kivity <avi@qumranet.com>
Cc: kvm@vger.kernel.org
Subject: [PATCH][REPOST] KVM: VMX: Always return 0 for clear_flush_young() when using EPT
Date: Thu, 4 Sep 2008 09:29:01 +0800 [thread overview]
Message-ID: <200809040929.02012.sheng.yang@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 2279 bytes --]
Hi Avi
It seems something wrong with my git-send-email, and I can't got my post from
kvm@vger.kernel.org, so resend it. Sorry for inconvenient.
Thanks!
--
From: Sheng Yang <sheng.yang@intel.com>
Date: Mon, 1 Sep 2008 13:22:09 +0800
Subject: [PATCH] KVM: VMX: Always return 0 for clear_flush_young() when using
EPT
As well as discard fake accessed bit and dirty bit of EPT.
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
---
arch/x86/kvm/mmu.c | 15 +++++++++++----
arch/x86/kvm/vmx.c | 3 +--
arch/x86/kvm/vmx.h | 2 --
3 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index f33c594..e437985 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -716,10 +716,17 @@ static int kvm_age_rmapp(struct kvm *kvm, unsigned long
*rmapp)
int _young;
u64 _spte = *spte;
BUG_ON(!(_spte & PT_PRESENT_MASK));
- _young = _spte & PT_ACCESSED_MASK;
- if (_young) {
- young = 1;
- clear_bit(PT_ACCESSED_SHIFT, (unsigned long *)spte);
+
+ /* always return old for EPT */
+ if (!shadow_accessed_mask)
+ _young = 0;
+ else {
+ _young = _spte & PT_ACCESSED_MASK;
+ if (_young) {
+ young = 1;
+ clear_bit(PT_ACCESSED_SHIFT,
+ (unsigned long *)spte);
+ }
}
spte = rmap_next(kvm, rmapp, spte);
}
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 81c121c..d637897 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3557,8 +3557,7 @@ static int __init vmx_init(void)
kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
VMX_EPT_WRITABLE_MASK |
VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
- kvm_mmu_set_mask_ptes(0ull, VMX_EPT_FAKE_ACCESSED_MASK,
- VMX_EPT_FAKE_DIRTY_MASK, 0ull,
+ kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
VMX_EPT_EXECUTABLE_MASK);
kvm_enable_tdp();
} else
diff --git a/arch/x86/kvm/vmx.h b/arch/x86/kvm/vmx.h
index 0c22e5f..41e8c10 100644
--- a/arch/x86/kvm/vmx.h
+++ b/arch/x86/kvm/vmx.h
@@ -370,8 +370,6 @@ enum vmcs_field {
#define VMX_EPT_READABLE_MASK 0x1ull
#define VMX_EPT_WRITABLE_MASK 0x2ull
#define VMX_EPT_EXECUTABLE_MASK 0x4ull
-#define VMX_EPT_FAKE_ACCESSED_MASK (1ull << 62)
-#define VMX_EPT_FAKE_DIRTY_MASK (1ull << 63)
#define VMX_EPT_IDENTITY_PAGETABLE_ADDR 0xfffbc000ul
--
1.5.4.5
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From 23229946e717294091bf54cee704fb3b1cd4167d Mon Sep 17 00:00:00 2001
From: Sheng Yang <sheng.yang@intel.com>
Date: Mon, 1 Sep 2008 13:22:09 +0800
Subject: [PATCH] KVM: VMX: Always return 0 for clear_flush_young() when using EPT
As well as discard fake accessed bit and dirty bit of EPT.
Signed-off-by: Sheng Yang <sheng.yang@intel.com>
---
arch/x86/kvm/mmu.c | 15 +++++++++++----
arch/x86/kvm/vmx.c | 3 +--
arch/x86/kvm/vmx.h | 2 --
3 files changed, 12 insertions(+), 8 deletions(-)
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index f33c594..e437985 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -716,10 +716,17 @@ static int kvm_age_rmapp(struct kvm *kvm, unsigned long *rmapp)
int _young;
u64 _spte = *spte;
BUG_ON(!(_spte & PT_PRESENT_MASK));
- _young = _spte & PT_ACCESSED_MASK;
- if (_young) {
- young = 1;
- clear_bit(PT_ACCESSED_SHIFT, (unsigned long *)spte);
+
+ /* always return old for EPT */
+ if (!shadow_accessed_mask)
+ _young = 0;
+ else {
+ _young = _spte & PT_ACCESSED_MASK;
+ if (_young) {
+ young = 1;
+ clear_bit(PT_ACCESSED_SHIFT,
+ (unsigned long *)spte);
+ }
}
spte = rmap_next(kvm, rmapp, spte);
}
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 81c121c..d637897 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3557,8 +3557,7 @@ static int __init vmx_init(void)
kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
VMX_EPT_WRITABLE_MASK |
VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
- kvm_mmu_set_mask_ptes(0ull, VMX_EPT_FAKE_ACCESSED_MASK,
- VMX_EPT_FAKE_DIRTY_MASK, 0ull,
+ kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
VMX_EPT_EXECUTABLE_MASK);
kvm_enable_tdp();
} else
diff --git a/arch/x86/kvm/vmx.h b/arch/x86/kvm/vmx.h
index 0c22e5f..41e8c10 100644
--- a/arch/x86/kvm/vmx.h
+++ b/arch/x86/kvm/vmx.h
@@ -370,8 +370,6 @@ enum vmcs_field {
#define VMX_EPT_READABLE_MASK 0x1ull
#define VMX_EPT_WRITABLE_MASK 0x2ull
#define VMX_EPT_EXECUTABLE_MASK 0x4ull
-#define VMX_EPT_FAKE_ACCESSED_MASK (1ull << 62)
-#define VMX_EPT_FAKE_DIRTY_MASK (1ull << 63)
#define VMX_EPT_IDENTITY_PAGETABLE_ADDR 0xfffbc000ul
--
1.5.4.5
next reply other threads:[~2008-09-04 1:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-04 1:29 Yang, Sheng [this message]
2008-09-07 13:31 ` [PATCH][REPOST] KVM: VMX: Always return 0 for clear_flush_young() when using EPT Avi Kivity
2008-09-08 7:22 ` Yang, Sheng
2008-09-11 8:48 ` Avi Kivity
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