[PATCH 1/2] KVM: Discard shadow_mt_mask

[Sheng Yang <sheng@linux.intel.com>]

mt_mask is out of date, now it have only been used as a flag to indicate if TDP
enabled. Get rid of it and use tdp_enabled instead.

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
---
 arch/x86/include/asm/kvm_host.h |    2 +-
 arch/x86/kvm/mmu.c              |    8 +++-----
 arch/x86/kvm/vmx.c              |    3 +--
 arch/x86/kvm/x86.c              |    2 +-
 4 files changed, 6 insertions(+), 9 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index cb306cf..ba6906f 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -537,7 +537,7 @@ int kvm_mmu_setup(struct kvm_vcpu *vcpu);
 void kvm_mmu_set_nonpresent_ptes(u64 trap_pte, u64 notrap_pte);
 void kvm_mmu_set_base_ptes(u64 base_pte);
 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
-		u64 dirty_mask, u64 nx_mask, u64 x_mask, u64 mt_mask);
+		u64 dirty_mask, u64 nx_mask, u64 x_mask);
 
 int kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
 void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 5b79afa..55c6923 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -178,7 +178,6 @@ static u64 __read_mostly shadow_x_mask;	/* mutual exclusive with nx_mask */
 static u64 __read_mostly shadow_user_mask;
 static u64 __read_mostly shadow_accessed_mask;
 static u64 __read_mostly shadow_dirty_mask;
-static u64 __read_mostly shadow_mt_mask;
 
 static inline u64 rsvd_bits(int s, int e)
 {
@@ -199,14 +198,13 @@ void kvm_mmu_set_base_ptes(u64 base_pte)
 EXPORT_SYMBOL_GPL(kvm_mmu_set_base_ptes);
 
 void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
-		u64 dirty_mask, u64 nx_mask, u64 x_mask, u64 mt_mask)
+		u64 dirty_mask, u64 nx_mask, u64 x_mask)
 {
 	shadow_user_mask = user_mask;
 	shadow_accessed_mask = accessed_mask;
 	shadow_dirty_mask = dirty_mask;
 	shadow_nx_mask = nx_mask;
 	shadow_x_mask = x_mask;
-	shadow_mt_mask = mt_mask;
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_set_mask_ptes);
 
@@ -1670,7 +1668,7 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
 {
 	u64 spte;
 	int ret = 0;
-	u64 mt_mask = shadow_mt_mask;
+	u64 mt_mask;
 
 	/*
 	 * We don't set the accessed bit, since we sometimes want to see
@@ -1690,7 +1688,7 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
 		spte |= shadow_user_mask;
 	if (largepage)
 		spte |= PT_PAGE_SIZE_MASK;
-	if (mt_mask) {
+	if (tdp_enabled) {
 		if (!kvm_is_mmio_pfn(pfn)) {
 			mt_mask = get_memory_type(vcpu, gfn) <<
 				kvm_x86_ops->get_mt_mask_shift();
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index c6997c0..85db8b2 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -3796,8 +3796,7 @@ static int __init vmx_init(void)
 		kvm_mmu_set_base_ptes(VMX_EPT_READABLE_MASK |
 			VMX_EPT_WRITABLE_MASK);
 		kvm_mmu_set_mask_ptes(0ull, 0ull, 0ull, 0ull,
-				VMX_EPT_EXECUTABLE_MASK,
-				VMX_EPT_DEFAULT_MT << VMX_EPT_MT_EPTE_SHIFT);
+				VMX_EPT_EXECUTABLE_MASK);
 		kvm_enable_tdp();
 	} else
 		kvm_disable_tdp();
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8cb8542..76adda4 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2768,7 +2768,7 @@ int kvm_arch_init(void *opaque)
 	kvm_mmu_set_nonpresent_ptes(0ull, 0ull);
 	kvm_mmu_set_base_ptes(PT_PRESENT_MASK);
 	kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK,
-			PT_DIRTY_MASK, PT64_NX_MASK, 0, 0);
+			PT_DIRTY_MASK, PT64_NX_MASK, 0);
 
 	for_each_possible_cpu(cpu)
 		per_cpu(cpu_tsc_khz, cpu) = tsc_khz;
-- 
1.5.4.5