linux-kernel - [PATCH 2/3] KVM: x86/mmu: Use "unsigned int", not "u32", for SPTEs' @access info

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: <20220624171808.2845941-3-seanjc@google.com>
Date:   Fri, 24 Jun 2022 17:18:07 +0000
From:   Sean Christopherson <seanjc@...gle.com>
To:     Paolo Bonzini <pbonzini@...hat.com>
Cc:     Sean Christopherson <seanjc@...gle.com>,
        Vitaly Kuznetsov <vkuznets@...hat.com>,
        Wanpeng Li <wanpengli@...cent.com>,
        Jim Mattson <jmattson@...gle.com>,
        Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, David Matlack <dmatlack@...gle.com>
Subject: [PATCH 2/3] KVM: x86/mmu: Use "unsigned int", not "u32", for SPTEs'
 @access info

Use an "unsigned int" for @access parameters instead of a "u32", mostly
to be consistent throughout KVM, but also because "u32" is misleading.
@access can actually squeeze into a u8, i.e. doesn't need 32 bits, but is
as an "unsigned int" because sp->role.access is an unsigned int.

No functional change intended.

Link: https://lore.kernel.org/all/YqyZxEfxXLsHGoZ%2F@google.com
Cc: David Matlack <dmatlack@...gle.com>
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/kvm/mmu/mmu.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 07dfed427d5b..e2213eeadebc 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -717,7 +717,8 @@ static u32 kvm_mmu_page_get_access(struct kvm_mmu_page *sp, int index)
 	return sp->role.access;
 }
 
-static void kvm_mmu_page_set_translation(struct kvm_mmu_page *sp, int index, gfn_t gfn, u32 access)
+static void kvm_mmu_page_set_translation(struct kvm_mmu_page *sp, int index,
+					 gfn_t gfn, unsigned int access)
 {
 	if (sp_has_gptes(sp)) {
 		sp->shadowed_translation[index] = (gfn << PAGE_SHIFT) | access;
@@ -735,7 +736,8 @@ static void kvm_mmu_page_set_translation(struct kvm_mmu_page *sp, int index, gfn
 	          sp->gfn, kvm_mmu_page_get_gfn(sp, index), gfn);
 }
 
-static void kvm_mmu_page_set_access(struct kvm_mmu_page *sp, int index, u32 access)
+static void kvm_mmu_page_set_access(struct kvm_mmu_page *sp, int index,
+				    unsigned int access)
 {
 	gfn_t gfn = kvm_mmu_page_get_gfn(sp, index);
 
@@ -1580,7 +1582,7 @@ static bool kvm_test_age_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
 static void __rmap_add(struct kvm *kvm,
 		       struct kvm_mmu_memory_cache *cache,
 		       const struct kvm_memory_slot *slot,
-		       u64 *spte, gfn_t gfn, u32 access)
+		       u64 *spte, gfn_t gfn, unsigned int access)
 {
 	struct kvm_mmu_page *sp;
 	struct kvm_rmap_head *rmap_head;
@@ -1601,7 +1603,7 @@ static void __rmap_add(struct kvm *kvm,
 }
 
 static void rmap_add(struct kvm_vcpu *vcpu, const struct kvm_memory_slot *slot,
-		     u64 *spte, gfn_t gfn, u32 access)
+		     u64 *spte, gfn_t gfn, unsigned int access)
 {
 	struct kvm_mmu_memory_cache *cache = &vcpu->arch.mmu_pte_list_desc_cache;
 
-- 
2.37.0.rc0.161.g10f37bed90-goog