KVM: MMU: clean up make_spte return value

Now that make_spte is called directly by the shadow MMU (rather than
wrapped by set_spte), it only has to return one boolean value.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 19c2fd2..dcbe7df 100644 (file)
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -2683,7 +2683,7 @@ static int mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
        int was_rmapped = 0;
        int ret = RET_PF_FIXED;
        bool flush = false;
-       int make_spte_ret;
+       bool wrprot;
        u64 spte;
 
        pgprintk("%s: spte %llx write_fault %d gfn %llx\n", __func__,
@@ -2715,8 +2715,8 @@ static int mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
                        was_rmapped = 1;
        }
 
-       make_spte_ret = make_spte(vcpu, pte_access, level, gfn, pfn, *sptep, speculative,
-                                true, host_writable, sp_ad_disabled(sp), &spte);
+       wrprot = make_spte(vcpu, pte_access, level, gfn, pfn, *sptep, speculative,
+                          true, host_writable, sp_ad_disabled(sp), &spte);
 
        if (*sptep == spte) {
                ret = RET_PF_SPURIOUS;
@@ -2725,7 +2725,7 @@ static int mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
                flush |= mmu_spte_update(sptep, spte);
        }
 
-       if (make_spte_ret & SET_SPTE_WRITE_PROTECTED_PT) {
+       if (wrprot) {
                if (write_fault)
                        ret = RET_PF_EMULATE;
        }

diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h
index f0295ad..94f4e75 100644 (file)
--- a/arch/x86/kvm/mmu/mmu_internal.h
+++ b/arch/x86/kvm/mmu/mmu_internal.h
@@ -150,11 +150,6 @@ enum {
        RET_PF_SPURIOUS,
 };
 
-/* Bits which may be returned by set_spte() */
-#define SET_SPTE_WRITE_PROTECTED_PT    BIT(0)
-#define SET_SPTE_NEED_REMOTE_TLB_FLUSH BIT(1)
-#define SET_SPTE_SPURIOUS              BIT(2)
-
 int kvm_mmu_max_mapping_level(struct kvm *kvm,
                              const struct kvm_memory_slot *slot, gfn_t gfn,
                              kvm_pfn_t pfn, int max_level);

diff --git a/arch/x86/kvm/mmu/spte.c b/arch/x86/kvm/mmu/spte.c
index 66be945..29ea996 100644 (file)
--- a/arch/x86/kvm/mmu/spte.c
+++ b/arch/x86/kvm/mmu/spte.c
@@ -89,13 +89,13 @@ static bool kvm_is_mmio_pfn(kvm_pfn_t pfn)
                                     E820_TYPE_RAM);
 }
 
-int make_spte(struct kvm_vcpu *vcpu, unsigned int pte_access, int level,
+bool make_spte(struct kvm_vcpu *vcpu, unsigned int pte_access, int level,
                     gfn_t gfn, kvm_pfn_t pfn, u64 old_spte, bool speculative,
                     bool can_unsync, bool host_writable, bool ad_disabled,
                     u64 *new_spte)
 {
        u64 spte = SPTE_MMU_PRESENT_MASK;
-       int ret = 0;
+       bool wrprot = false;
 
        if (ad_disabled)
                spte |= SPTE_TDP_AD_DISABLED_MASK;
@@ -162,7 +162,7 @@ int make_spte(struct kvm_vcpu *vcpu, unsigned int pte_access, int level,
                if (mmu_try_to_unsync_pages(vcpu, gfn, can_unsync, speculative)) {
                        pgprintk("%s: found shadow page for %llx, marking ro\n",
                                 __func__, gfn);
-                       ret |= SET_SPTE_WRITE_PROTECTED_PT;
+                       wrprot = true;
                        pte_access &= ~ACC_WRITE_MASK;
                        spte &= ~(PT_WRITABLE_MASK | shadow_mmu_writable_mask);
                }
@@ -183,7 +183,7 @@ out:
                kvm_vcpu_mark_page_dirty(vcpu, gfn);
 
        *new_spte = spte;
-       return ret;
+       return wrprot;
 }
 
 u64 make_nonleaf_spte(u64 *child_pt, bool ad_disabled)

diff --git a/arch/x86/kvm/mmu/spte.h b/arch/x86/kvm/mmu/spte.h
index eb7b227..1998ec5 100644 (file)
--- a/arch/x86/kvm/mmu/spte.h
+++ b/arch/x86/kvm/mmu/spte.h
@@ -334,12 +334,7 @@ static inline u64 get_mmio_spte_generation(u64 spte)
        return gen;
 }
 
-/* Bits which may be returned by set_spte() */
-#define SET_SPTE_WRITE_PROTECTED_PT    BIT(0)
-#define SET_SPTE_NEED_REMOTE_TLB_FLUSH BIT(1)
-#define SET_SPTE_SPURIOUS              BIT(2)
-
-int make_spte(struct kvm_vcpu *vcpu, unsigned int pte_access, int level,
+bool make_spte(struct kvm_vcpu *vcpu, unsigned int pte_access, int level,
                     gfn_t gfn, kvm_pfn_t pfn, u64 old_spte, bool speculative,
                     bool can_unsync, bool host_writable, bool ad_disabled,
                     u64 *new_spte);

diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c
index 3e10658..6de2c95 100644 (file)
--- a/arch/x86/kvm/mmu/tdp_mmu.c
+++ b/arch/x86/kvm/mmu/tdp_mmu.c
@@ -898,12 +898,12 @@ static int tdp_mmu_map_handle_target_level(struct kvm_vcpu *vcpu,
 {
        u64 new_spte;
        int ret = RET_PF_FIXED;
-       int make_spte_ret = 0;
+       bool wrprot = false;
 
        if (unlikely(!fault->slot))
                new_spte = make_mmio_spte(vcpu, iter->gfn, ACC_ALL);
        else
-               make_spte_ret = make_spte(vcpu, ACC_ALL, iter->level, iter->gfn,
+               wrprot = make_spte(vcpu, ACC_ALL, iter->level, iter->gfn,
                                         fault->pfn, iter->old_spte, fault->prefault, true,
                                         fault->map_writable, !shadow_accessed_mask,
                                         &new_spte);
@@ -918,7 +918,7 @@ static int tdp_mmu_map_handle_target_level(struct kvm_vcpu *vcpu,
         * protected, emulation is needed. If the emulation was skipped,
         * the vCPU would have the same fault again.
         */
-       if (make_spte_ret & SET_SPTE_WRITE_PROTECTED_PT) {
+       if (wrprot) {
                if (fault->write)
                        ret = RET_PF_EMULATE;
        }