[PATCH v8 03/13] KVM: Rename kvm_arch_has_private_mem() to kvm_arch_supports_gmem()

[Fuad Tabba <tabba@google.com>]

The function kvm_arch_has_private_mem() is used to indicate whether
guest_memfd is supported by the architecture, which until now implies
that its private. To decouple guest_memfd support from whether the
memory is private, rename this function to kvm_arch_supports_gmem().

Co-developed-by: David Hildenbrand <david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Fuad Tabba <tabba@google.com>
---
 arch/x86/include/asm/kvm_host.h | 8 ++++----
 arch/x86/kvm/mmu/mmu.c          | 8 ++++----
 include/linux/kvm_host.h        | 6 +++---
 virt/kvm/kvm_main.c             | 6 +++---
 4 files changed, 14 insertions(+), 14 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 52f6f6d08558..4a83fbae7056 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -2254,9 +2254,9 @@ void kvm_configure_mmu(bool enable_tdp, int tdp_forced_root_level,
 
 
 #ifdef CONFIG_KVM_GMEM
-#define kvm_arch_has_private_mem(kvm) ((kvm)->arch.has_private_mem)
+#define kvm_arch_supports_gmem(kvm) ((kvm)->arch.has_private_mem)
 #else
-#define kvm_arch_has_private_mem(kvm) false
+#define kvm_arch_supports_gmem(kvm) false
 #endif
 
 #define kvm_arch_has_readonly_mem(kvm) (!(kvm)->arch.has_protected_state)
@@ -2309,8 +2309,8 @@ enum {
 #define HF_SMM_INSIDE_NMI_MASK	(1 << 2)
 
 # define KVM_MAX_NR_ADDRESS_SPACES	2
-/* SMM is currently unsupported for guests with private memory. */
-# define kvm_arch_nr_memslot_as_ids(kvm) (kvm_arch_has_private_mem(kvm) ? 1 : 2)
+/* SMM is currently unsupported for guests with guest_memfd (esp private) memory. */
+# define kvm_arch_nr_memslot_as_ids(kvm) (kvm_arch_supports_gmem(kvm) ? 1 : 2)
 # define kvm_arch_vcpu_memslots_id(vcpu) ((vcpu)->arch.hflags & HF_SMM_MASK ? 1 : 0)
 # define kvm_memslots_for_spte_role(kvm, role) __kvm_memslots(kvm, (role).smm)
 #else
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 63bb77ee1bb1..7d654506d800 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -4917,7 +4917,7 @@ long kvm_arch_vcpu_pre_fault_memory(struct kvm_vcpu *vcpu,
 	if (r)
 		return r;
 
-	if (kvm_arch_has_private_mem(vcpu->kvm) &&
+	if (kvm_arch_supports_gmem(vcpu->kvm) &&
 	    kvm_mem_is_private(vcpu->kvm, gpa_to_gfn(range->gpa)))
 		error_code |= PFERR_PRIVATE_ACCESS;
 
@@ -7683,7 +7683,7 @@ bool kvm_arch_pre_set_memory_attributes(struct kvm *kvm,
 	 * Zapping SPTEs in this case ensures KVM will reassess whether or not
 	 * a hugepage can be used for affected ranges.
 	 */
-	if (WARN_ON_ONCE(!kvm_arch_has_private_mem(kvm)))
+	if (WARN_ON_ONCE(!kvm_arch_supports_gmem(kvm)))
 		return false;
 
 	/* Unmap the old attribute page. */
@@ -7746,7 +7746,7 @@ bool kvm_arch_post_set_memory_attributes(struct kvm *kvm,
 	 * a range that has PRIVATE GFNs, and conversely converting a range to
 	 * SHARED may now allow hugepages.
 	 */
-	if (WARN_ON_ONCE(!kvm_arch_has_private_mem(kvm)))
+	if (WARN_ON_ONCE(!kvm_arch_supports_gmem(kvm)))
 		return false;
 
 	/*
@@ -7802,7 +7802,7 @@ void kvm_mmu_init_memslot_memory_attributes(struct kvm *kvm,
 {
 	int level;
 
-	if (!kvm_arch_has_private_mem(kvm))
+	if (!kvm_arch_supports_gmem(kvm))
 		return;
 
 	for (level = PG_LEVEL_2M; level <= KVM_MAX_HUGEPAGE_LEVEL; level++) {
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 7ca23837fa52..6ca7279520cf 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -719,11 +719,11 @@ static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu)
 #endif
 
 /*
- * Arch code must define kvm_arch_has_private_mem if support for private memory
+ * Arch code must define kvm_arch_supports_gmem if support for guest_memfd
  * is enabled.
  */
-#if !defined(kvm_arch_has_private_mem) && !IS_ENABLED(CONFIG_KVM_GMEM)
-static inline bool kvm_arch_has_private_mem(struct kvm *kvm)
+#if !defined(kvm_arch_supports_gmem) && !IS_ENABLED(CONFIG_KVM_GMEM)
+static inline bool kvm_arch_supports_gmem(struct kvm *kvm)
 {
 	return false;
 }
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 4996cac41a8f..2468d50a9ed4 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1531,7 +1531,7 @@ static int check_memory_region_flags(struct kvm *kvm,
 {
 	u32 valid_flags = KVM_MEM_LOG_DIRTY_PAGES;
 
-	if (kvm_arch_has_private_mem(kvm))
+	if (kvm_arch_supports_gmem(kvm))
 		valid_flags |= KVM_MEM_GUEST_MEMFD;
 
 	/* Dirty logging private memory is not currently supported. */
@@ -2362,7 +2362,7 @@ static int kvm_vm_ioctl_clear_dirty_log(struct kvm *kvm,
 #ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES
 static u64 kvm_supported_mem_attributes(struct kvm *kvm)
 {
-	if (!kvm || kvm_arch_has_private_mem(kvm))
+	if (!kvm || kvm_arch_supports_gmem(kvm))
 		return KVM_MEMORY_ATTRIBUTE_PRIVATE;
 
 	return 0;
@@ -4844,7 +4844,7 @@ static int kvm_vm_ioctl_check_extension_generic(struct kvm *kvm, long arg)
 #endif
 #ifdef CONFIG_KVM_GMEM
 	case KVM_CAP_GUEST_MEMFD:
-		return !kvm || kvm_arch_has_private_mem(kvm);
+		return !kvm || kvm_arch_supports_gmem(kvm);
 #endif
 	default:
 		break;
-- 
2.49.0.901.g37484f566f-goog