[v2][PATCH] kvm: x86: vmx: remove MMIO_MAX_GEN

[Tiejun Chen <tiejun.chen@xxxxxxxxx>]

Actually MMIO_MAX_GEN is same as MMIO_GEN_MASK.

Signed-off-by: Tiejun Chen <tiejun.chen@xxxxxxxxx>
---
v2:

* Instead, we'd like to keep MMIO_GEN_MASK.

 arch/x86/kvm/mmu.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index ac1c4de..4ea0dcb 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -214,13 +214,12 @@ EXPORT_SYMBOL_GPL(kvm_mmu_set_mmio_spte_mask);
 #define MMIO_GEN_LOW_SHIFT		10
 #define MMIO_GEN_LOW_MASK		((1 << MMIO_GEN_LOW_SHIFT) - 2)
 #define MMIO_GEN_MASK			((1 << MMIO_GEN_SHIFT) - 1)
-#define MMIO_MAX_GEN			((1 << MMIO_GEN_SHIFT) - 1)
 
 static u64 generation_mmio_spte_mask(unsigned int gen)
 {
 	u64 mask;
 
-	WARN_ON(gen > MMIO_MAX_GEN);
+	WARN_ON(gen & ~MMIO_GEN_MASK);
 
 	mask = (gen & MMIO_GEN_LOW_MASK) << MMIO_SPTE_GEN_LOW_SHIFT;
 	mask |= ((u64)gen >> MMIO_GEN_LOW_SHIFT) << MMIO_SPTE_GEN_HIGH_SHIFT;
@@ -263,13 +262,13 @@ static bool is_mmio_spte(u64 spte)
 
 static gfn_t get_mmio_spte_gfn(u64 spte)
 {
-	u64 mask = generation_mmio_spte_mask(MMIO_MAX_GEN) | shadow_mmio_mask;
+	u64 mask = generation_mmio_spte_mask(MMIO_GEN_MASK) | shadow_mmio_mask;
 	return (spte & ~mask) >> PAGE_SHIFT;
 }
 
 static unsigned get_mmio_spte_access(u64 spte)
 {
-	u64 mask = generation_mmio_spte_mask(MMIO_MAX_GEN) | shadow_mmio_mask;
+	u64 mask = generation_mmio_spte_mask(MMIO_GEN_MASK) | shadow_mmio_mask;
 	return (spte & ~mask) & ~PAGE_MASK;
 }
 
-- 
1.9.1

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