kvm: mmu: Replace unsigned with unsigned int for PTE access

This change “kvm: mmu: Replace unsigned with unsigned int for PTE access” (commit 0a2b64c) in Linux kernel is authored by Ben Gardon <bgardon [at] google.com> on Mon Feb 3 15:09:09 2020 -0800.

Description of "kvm: mmu: Replace unsigned with unsigned int for PTE access"

The change “kvm: mmu: Replace unsigned with unsigned int for PTE access” introduces changes as follows.

kvm: mmu: Replace unsigned with unsigned int for PTE access

There are several functions which pass an access permission mask for
SPTEs as an unsigned. This works, but checkpatch complains about it.
Switch the occurrences of unsigned to unsigned int to satisfy checkpatch.

No functional change expected.

Tested by running kvm-unit-tests on an Intel Haswell machine. This
commit introduced no new failures.

Signed-off-by: Ben Gardon <bgardon@google.com>
Reviewed-by: Oliver Upton <oupton@google.com>
Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

Linux kernel releases containing commit 0a2b64c

The Linux kernel releases containing this commit are as follows.

Linux kernel code changes from "kvm: mmu: Replace unsigned with unsigned int for PTE access"

There are 24 lines of Linux source code added/deleted in this change. Code changes to Linux kernel are as follows.

 arch/x86/kvm/mmu/mmu.c | 24 +++++++++++++-----------
 1 file changed, 13 insertions(+), 11 deletions(-)
 
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index adc84f0f16ba..7c544e17c5b3 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -452,7 +452,7 @@ static u64 get_mmio_spte_generation(u64 spte)
 }
 
 static void mark_mmio_spte(struct kvm_vcpu *vcpu, u64 *sptep, u64 gfn,
-			   unsigned access)
+			   unsigned int access)
 {
 	u64 gen = kvm_vcpu_memslots(vcpu)->generation & MMIO_SPTE_GEN_MASK;
 	u64 mask = generation_mmio_spte_mask(gen);
@@ -484,7 +484,7 @@ static unsigned get_mmio_spte_access(u64 spte)
 }
 
 static bool set_mmio_spte(struct kvm_vcpu *vcpu, u64 *sptep, gfn_t gfn,
-			  kvm_pfn_t pfn, unsigned access)
+			  kvm_pfn_t pfn, unsigned int access)
 {
 	if (unlikely(is_noslot_pfn(pfn))) {
 		mark_mmio_spte(vcpu, sptep, gfn, access);
@@ -2475,7 +2475,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu,
 					     gva_t gaddr,
 					     unsigned level,
 					     int direct,
-					     unsigned access)
+					     unsigned int access)
 {
 	union kvm_mmu_page_role role;
 	unsigned quadrant;
@@ -2990,7 +2990,7 @@ static bool kvm_is_mmio_pfn(kvm_pfn_t pfn)
 #define SET_SPTE_NEED_REMOTE_TLB_FLUSH	BIT(1)
 
 static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
-		    unsigned pte_access, int level,
+		    unsigned int pte_access, int level,
 		    gfn_t gfn, kvm_pfn_t pfn, bool speculative,
 		    bool can_unsync, bool host_writable)
 {
@@ -3081,9 +3081,10 @@ static int set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
 	return ret;
 }
 
-static int mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep, unsigned pte_access,
-			int write_fault, int level, gfn_t gfn, kvm_pfn_t pfn,
-		       	bool speculative, bool host_writable)
+static int mmu_set_spte(struct kvm_vcpu *vcpu, u64 *sptep,
+			unsigned int pte_access, int write_fault, int level,
+			gfn_t gfn, kvm_pfn_t pfn, bool speculative,
+			bool host_writable)
 {
 	int was_rmapped = 0;
 	int rmap_count;
@@ -3165,7 +3166,7 @@ static int direct_pte_prefetch_many(struct kvm_vcpu *vcpu,
 {
 	struct page *pages[PTE_PREFETCH_NUM];
 	struct kvm_memory_slot *slot;
-	unsigned access = sp->role.access;
+	unsigned int access = sp->role.access;
 	int i, ret;
 	gfn_t gfn;
 
@@ -3400,7 +3401,8 @@ static int kvm_handle_bad_page(struct kvm_vcpu *vcpu, gfn_t gfn, kvm_pfn_t pfn)
 }
 
 static bool handle_abnormal_pfn(struct kvm_vcpu *vcpu, gva_t gva, gfn_t gfn,
-				kvm_pfn_t pfn, unsigned access, int *ret_val)
+				kvm_pfn_t pfn, unsigned int access,
+				int *ret_val)
 {
 	/* The pfn is invalid, report the error! */
 	if (unlikely(is_error_pfn(pfn))) {
@@ -4005,7 +4007,7 @@ static int handle_mmio_page_fault(struct kvm_vcpu *vcpu, u64 addr, bool direct)
 
 	if (is_mmio_spte(spte)) {
 		gfn_t gfn = get_mmio_spte_gfn(spte);
-		unsigned access = get_mmio_spte_access(spte);
+		unsigned int access = get_mmio_spte_access(spte);
 
 		if (!check_mmio_spte(vcpu, spte))
 			return RET_PF_INVALID;
@@ -4349,7 +4351,7 @@ static void inject_page_fault(struct kvm_vcpu *vcpu,
 }
 
 static bool sync_mmio_spte(struct kvm_vcpu *vcpu, u64 *sptep, gfn_t gfn,
-			   unsigned access, int *nr_present)
+			   unsigned int access, int *nr_present)
 {
 	if (unlikely(is_mmio_spte(*sptep))) {
 		if (gfn != get_mmio_spte_gfn(*sptep)) {

The commit for this change in Linux stable tree is 0a2b64c (patch).

Last modified: 2020/02/08