linux-kernel - [PATCH v3 25/31] KVM: MMU: remove unnecessary argument to mmu_set

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20210924163152.289027-26-pbonzini@redhat.com>
Date:   Fri, 24 Sep 2021 12:31:46 -0400
From:   Paolo Bonzini <pbonzini@...hat.com>
To:     linux-kernel@...r.kernel.org, kvm@...r.kernel.org
Cc:     dmatlack@...gle.com, seanjc@...gle.com
Subject: [PATCH v3 25/31] KVM: MMU: remove unnecessary argument to mmu_set_spte

The level of the new SPTE can be found in the kvm_mmu_page struct; there
is no need to pass it down.

Signed-off-by: Paolo Bonzini <pbonzini@...hat.com>
---
 arch/x86/kvm/mmu/mmu.c         | 7 ++++---
 arch/x86/kvm/mmu/paging_tmpl.h | 6 +++---
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index dcbe7df2f890..91303006faaf 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -2675,11 +2675,12 @@ int mmu_try_to_unsync_pages(struct kvm_vcpu *vcpu, gfn_t gfn, bool can_unsync,
 }
 
 static int mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
-			unsigned int pte_access, bool write_fault, int level,
+			unsigned int pte_access, bool write_fault,
 			gfn_t gfn, kvm_pfn_t pfn, bool speculative,
 			bool host_writable)
 {
 	struct kvm_mmu_page *sp = sptep_to_sp(sptep);
+	int level = sp->role.level;
 	int was_rmapped = 0;
 	int ret = RET_PF_FIXED;
 	bool flush = false;
@@ -2777,7 +2778,7 @@ static int direct_pte_prefetch_many(struct kvm_vcpu *vcpu,
 		return -1;
 
 	for (i = 0; i < ret; i++, gfn++, start++) {
-		mmu_set_spte(vcpu, start, access, false, sp->role.level, gfn,
+		mmu_set_spte(vcpu, start, access, false, gfn,
 			     page_to_pfn(pages[i]), true, true);
 		put_page(pages[i]);
 	}
@@ -2980,7 +2981,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault)
 		return -EFAULT;
 
 	ret = mmu_set_spte(vcpu, it.sptep, ACC_ALL,
-			   fault->write, fault->goal_level, base_gfn, fault->pfn,
+			   fault->write, base_gfn, fault->pfn,
 			   fault->prefault, fault->map_writable);
 	if (ret == RET_PF_SPURIOUS)
 		return ret;
diff --git a/arch/x86/kvm/mmu/paging_tmpl.h b/arch/x86/kvm/mmu/paging_tmpl.h
index 500962dceda0..7f2c6eeed04f 100644
--- a/arch/x86/kvm/mmu/paging_tmpl.h
+++ b/arch/x86/kvm/mmu/paging_tmpl.h
@@ -582,7 +582,7 @@ FNAME(prefetch_gpte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 	 * we call mmu_set_spte() with host_writable = true because
 	 * pte_prefetch_gfn_to_pfn always gets a writable pfn.
 	 */
-	mmu_set_spte(vcpu, spte, pte_access, false, PG_LEVEL_4K, gfn, pfn,
+	mmu_set_spte(vcpu, spte, pte_access, false, gfn, pfn,
 		     true, true);
 
 	kvm_release_pfn_clean(pfn);
@@ -764,8 +764,8 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, struct kvm_page_fault *fault,
 		return -EFAULT;
 
 	ret = mmu_set_spte(vcpu, it.sptep, gw->pte_access, fault->write,
-			   fault->goal_level, base_gfn, fault->pfn,
-			   fault->prefault, fault->map_writable);
+			   base_gfn, fault->pfn, fault->prefault,
+			   fault->map_writable);
 	if (ret == RET_PF_SPURIOUS)
 		return ret;
 
-- 
2.27.0