[PATCH 14/45] KVM: x86/mmu: Init memslot hugepage information for non-private_mem VMs too

[Paolo Bonzini]

From: Nicolas Saenz Julienne <nsaenz@xxxxxxxxxx>

The list of supported memory attributes is about to grow, and they will
be available on any VM type (as opposed to only ones targeted at
confidential computing). As such, update the check in
kvm_mmu_init_memslot_memory_attributes() to initialize huge page
information if any kind of memory attributes is available for the VM.

Signed-off-by: Nicolas Saenz Julienne <nsaenz@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Link: https://patch.msgid.link/20260918135030.171564-11-pbonzini@xxxxxxxxxx
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
 arch/x86/kvm/mmu/mmu.c   | 3 ++-
 include/linux/kvm_host.h | 6 ++++++
 virt/kvm/kvm_main.c      | 2 +-
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c
index 5be24b67f212..3755393de4ca 100644
--- a/arch/x86/kvm/mmu/mmu.c
+++ b/arch/x86/kvm/mmu/mmu.c
@@ -8361,7 +8361,8 @@ void kvm_mmu_init_memslot_memory_attributes(struct kvm *kvm,
 {
 	int level;
 
-	if (!kvm_arch_has_private_mem(kvm))
+	if (!kvm_arch_has_private_mem(kvm) &&
+	    !kvm_supported_vm_mem_attributes(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 5e386c3d2495..3d0293ebc864 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -2589,6 +2589,12 @@ bool kvm_arch_pre_set_vm_memory_attributes(struct kvm *kvm,
 					   struct kvm_gfn_range *range);
 bool kvm_arch_post_set_vm_memory_attributes(struct kvm *kvm,
 					    struct kvm_gfn_range *range);
+u64 kvm_supported_vm_mem_attributes(struct kvm *kvm);
+#else
+static inline u64 kvm_supported_vm_mem_attributes(struct kvm *kvm)
+{
+	return 0;
+}
 #endif  /* CONFIG_KVM_VM_MEMORY_ATTRIBUTES */
 
 #ifdef CONFIG_KVM_PRIVATE_MEMATTR_VM
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index cf4cb586f140..2fd595a901bd 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -2474,7 +2474,7 @@ static u64 kvm_supports_private_mem(struct kvm *kvm)
 #endif
 
 #ifdef CONFIG_KVM_VM_MEMORY_ATTRIBUTES
-static u64 kvm_supported_vm_mem_attributes(struct kvm *kvm)
+u64 kvm_supported_vm_mem_attributes(struct kvm *kvm)
 {
 	if (gmem_in_place_conversion || !kvm_supports_private_mem(kvm))
 		return 0;
-- 
2.52.0