linux-kernel - [PATCH v2 2/9] KVM: x86/mmu: Factor mt_mask out of __make

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Message-Id: <20220321224358.1305530-3-bgardon@google.com>
Date:   Mon, 21 Mar 2022 15:43:51 -0700
From:   Ben Gardon <bgardon@...gle.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     Paolo Bonzini <pbonzini@...hat.com>, Peter Xu <peterx@...hat.com>,
        Sean Christopherson <seanjc@...gle.com>,
        David Matlack <dmatlack@...gle.com>,
        Jim Mattson <jmattson@...gle.com>,
        David Dunn <daviddunn@...gle.com>,
        Jing Zhang <jingzhangos@...gle.com>,
        Junaid Shahid <junaids@...gle.com>,
        Ben Gardon <bgardon@...gle.com>
Subject: [PATCH v2 2/9] KVM: x86/mmu: Factor mt_mask out of __make_spte

In service of removing the vCPU pointer from __make_spte, factor the memory
type mask calculation out of __make_spte.

Signed-off-by: Ben Gardon <bgardon@...gle.com>
---
 arch/x86/kvm/mmu/spte.c | 12 ++++++++----
 arch/x86/kvm/mmu/spte.h |  3 ++-
 2 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/mmu/spte.c b/arch/x86/kvm/mmu/spte.c
index d3da0d3d41cb..931cf93c3b7e 100644
--- a/arch/x86/kvm/mmu/spte.c
+++ b/arch/x86/kvm/mmu/spte.c
@@ -93,7 +93,8 @@ static bool kvm_is_mmio_pfn(kvm_pfn_t pfn)
 bool __make_spte(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 		 const struct kvm_memory_slot *slot, unsigned int pte_access,
 		 gfn_t gfn, kvm_pfn_t pfn, u64 old_spte, bool prefetch,
-		 bool can_unsync, bool host_writable, u64 *new_spte)
+		 bool can_unsync, bool host_writable, u64 mt_mask,
+		 u64 *new_spte)
 {
 	int level = sp->role.level;
 	u64 spte = SPTE_MMU_PRESENT_MASK;
@@ -130,8 +131,7 @@ bool __make_spte(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 	if (level > PG_LEVEL_4K)
 		spte |= PT_PAGE_SIZE_MASK;
 	if (tdp_enabled)
-		spte |= static_call(kvm_x86_get_mt_mask)(vcpu, gfn,
-			kvm_is_mmio_pfn(pfn));
+		spte |= mt_mask;
 
 	if (host_writable)
 		spte |= shadow_host_writable_mask;
@@ -197,8 +197,12 @@ bool make_spte(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 	       u64 old_spte, bool prefetch, bool can_unsync,
 	       bool host_writable, u64 *new_spte)
 {
+	u64 mt_mask = static_call(kvm_x86_get_mt_mask)(vcpu, gfn,
+						       kvm_is_mmio_pfn(pfn));
+
 	return __make_spte(vcpu, sp, slot, pte_access, gfn, pfn, old_spte,
-			   prefetch, can_unsync, host_writable, new_spte);
+			   prefetch, can_unsync, host_writable, mt_mask,
+			   new_spte);
 
 }
 
diff --git a/arch/x86/kvm/mmu/spte.h b/arch/x86/kvm/mmu/spte.h
index 3fae3c3124f7..d051f955699e 100644
--- a/arch/x86/kvm/mmu/spte.h
+++ b/arch/x86/kvm/mmu/spte.h
@@ -413,7 +413,8 @@ static inline u64 get_mmio_spte_generation(u64 spte)
 bool __make_spte(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 		 const struct kvm_memory_slot *slot, unsigned int pte_access,
 		 gfn_t gfn, kvm_pfn_t pfn, u64 old_spte, bool prefetch,
-		 bool can_unsync, bool host_writable, u64 *new_spte);
+		 bool can_unsync, bool host_writable, u64 mt_mask,
+		 u64 *new_spte);
 bool make_spte(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 	       const struct kvm_memory_slot *slot,
 	       unsigned int pte_access, gfn_t gfn, kvm_pfn_t pfn,
-- 
2.35.1.894.gb6a874cedc-goog