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charset="utf-8" From: Patrick Roy x86 supports GUEST_MEMFD_FLAG_NO_DIRECT_MAP whenever direct map modifications are possible (which is always the case). Signed-off-by: Patrick Roy Reviewed-by: Ackerley Tng Reviewed-by: David Hildenbrand (Arm) Signed-off-by: Nikita Kalyazin --- arch/x86/include/asm/kvm_host.h | 6 ++++++ arch/x86/kvm/x86.c | 5 +++++ include/linux/kvm_host.h | 9 +++++++++ 3 files changed, 20 insertions(+) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_hos= t.h index 6e4e3ef9b8c7..171ce8b84137 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -28,6 +28,7 @@ #include #include #include +#include =20 #include #include @@ -2504,4 +2505,9 @@ static inline bool kvm_arch_has_irq_bypass(void) return enable_device_posted_irqs; } =20 +#ifdef CONFIG_KVM_GUEST_MEMFD +bool kvm_arch_gmem_supports_no_direct_map(struct kvm *kvm); +#define kvm_arch_gmem_supports_no_direct_map kvm_arch_gmem_supports_no_dir= ect_map +#endif /* CONFIG_KVM_GUEST_MEMFD */ + #endif /* _ASM_X86_KVM_HOST_H */ diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index fd1c4a36b593..6a4dcf449a37 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -14079,6 +14079,11 @@ void kvm_arch_gmem_invalidate(kvm_pfn_t start, kvm= _pfn_t end) kvm_x86_call(gmem_invalidate)(start, end); } #endif + +bool kvm_arch_gmem_supports_no_direct_map(struct kvm *kvm) +{ + return can_set_direct_map() && kvm->arch.vm_type !=3D KVM_X86_TDX_VM; +} #endif =20 int kvm_spec_ctrl_test_value(u64 value) diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index e8aa3d676c31..ce8c5fdf2752 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -742,6 +742,15 @@ static inline u64 kvm_gmem_get_supported_flags(struct = kvm *kvm) } #endif =20 +#ifdef CONFIG_KVM_GUEST_MEMFD +#ifndef kvm_arch_gmem_supports_no_direct_map +static inline bool kvm_arch_gmem_supports_no_direct_map(struct kvm *kvm) +{ + return false; +} +#endif +#endif /* CONFIG_KVM_GUEST_MEMFD */ + #ifndef kvm_arch_has_readonly_mem static inline bool kvm_arch_has_readonly_mem(struct kvm *kvm) { --=20 2.50.1