[PATCH v10 08/41] KVM: Consolidate private memory and guest_memfd ifdeffery in kvm_host.h
From: Ackerley Tng via B4 Relay <devnull+ackerleytng.google.com@kernel.org>
Date: 2026-08-07 21:52:48
Also in:
b4-sent, kvm, linux-coco, linux-doc, linux-kselftest, linux-mm, lkml
Subsystem:
kernel virtual machine (kvm), the rest · Maintainers:
Paolo Bonzini, Linus Torvalds
From: Sean Christopherson <seanjc@google.com> Move the kvm_arch_has_private_mem() stub and a few guest_memfd function definitions/declarations "down" in kvm_host.h to utilize existing #ifdefs, and so that related code is clustered together. No functional change intended. Signed-off-by: Sean Christopherson <seanjc@google.com> Reviewed-by: Xiaoyao Li <redacted> Reviewed-by: Binbin Wu <redacted> Reviewed-by: Fuad Tabba <redacted> Tested-by: Shivank Garg <redacted> Signed-off-by: Ackerley Tng <redacted> --- include/linux/kvm_host.h | 37 ++++++++++++++++--------------------- 1 file changed, 16 insertions(+), 21 deletions(-)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 9477ecebbbced..dfdb3c97a7ac9 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h@@ -722,27 +722,6 @@ static inline int kvm_arch_vcpu_memslots_id(struct kvm_vcpu *vcpu) } #endif -#ifndef kvm_arch_has_private_mem -static inline bool kvm_arch_has_private_mem(struct kvm *kvm) -{ - return false; -} -#endif - -#ifdef CONFIG_KVM_GUEST_MEMFD -bool kvm_arch_supports_gmem_init_shared(struct kvm *kvm); - -static inline u64 kvm_gmem_get_supported_flags(struct kvm *kvm) -{ - u64 flags = GUEST_MEMFD_FLAG_MMAP; - - if (!kvm || kvm_arch_supports_gmem_init_shared(kvm)) - flags |= GUEST_MEMFD_FLAG_INIT_SHARED; - - return flags; -} -#endif - #ifndef kvm_arch_has_readonly_mem static inline bool kvm_arch_has_readonly_mem(struct kvm *kvm) {
@@ -2592,6 +2571,11 @@ static inline bool kvm_mem_is_private(struct kvm *kvm, gfn_t gfn) #else #define gmem_in_place_conversion false +static inline bool kvm_arch_has_private_mem(struct kvm *kvm) +{ + return false; +} + static inline bool kvm_mem_is_private(struct kvm *kvm, gfn_t gfn) { return false;
@@ -2600,6 +2584,17 @@ static inline bool kvm_mem_is_private(struct kvm *kvm, gfn_t gfn) #ifdef CONFIG_KVM_GUEST_MEMFD bool kvm_gmem_is_private(struct kvm *kvm, gfn_t gfn); +bool kvm_arch_supports_gmem_init_shared(struct kvm *kvm); + +static inline u64 kvm_gmem_get_supported_flags(struct kvm *kvm) +{ + u64 flags = GUEST_MEMFD_FLAG_MMAP; + + if (!kvm || kvm_arch_supports_gmem_init_shared(kvm)) + flags |= GUEST_MEMFD_FLAG_INIT_SHARED; + + return flags; +} int kvm_gmem_get_pfn(struct kvm *kvm, struct kvm_memory_slot *slot, gfn_t gfn, kvm_pfn_t *pfn, struct page **page,
--
2.55.0.654.g21b8a5bc05-goog