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charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-Rspamd-Queue-Id: C1C1B1C0010 X-Stat-Signature: et4grjn6fw5nd657gknx6ey39y3e4sen X-Rspam-User: X-Rspamd-Server: rspam04 X-HE-Tag: 1775834355-528635 X-HE-Meta: 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 CpLQQgx2 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Patrick Roy =0A= =0A= x86 supports GUEST_MEMFD_FLAG_NO_DIRECT_MAP whenever direct map=0A= modifications are possible. Exclude TDX and SEV-SNP as they access=0A= pages via direct map in certain operations, such as population.=0A= =0A= Signed-off-by: Patrick Roy =0A= Reviewed-by: Ackerley Tng =0A= Reviewed-by: David Hildenbrand (Arm) =0A= Co-developed-by: Nikita Kalyazin =0A= Signed-off-by: Nikita Kalyazin =0A= ---=0A= arch/x86/include/asm/kvm_host.h | 6 ++++++=0A= arch/x86/kvm/x86.c | 7 +++++++=0A= include/linux/kvm_host.h | 9 +++++++++=0A= 3 files changed, 22 insertions(+)=0A= =0A= diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_hos= t.h=0A= index 6e4e3ef9b8c7..171ce8b84137 100644=0A= --- a/arch/x86/include/asm/kvm_host.h=0A= +++ b/arch/x86/include/asm/kvm_host.h=0A= @@ -28,6 +28,7 @@=0A= #include =0A= #include =0A= #include =0A= +#include =0A= =0A= #include =0A= #include =0A= @@ -2504,4 +2505,9 @@ static inline bool kvm_arch_has_irq_bypass(void)=0A= return enable_device_posted_irqs;=0A= }=0A= =0A= +#ifdef CONFIG_KVM_GUEST_MEMFD=0A= +bool kvm_arch_gmem_supports_no_direct_map(struct kvm *kvm);=0A= +#define kvm_arch_gmem_supports_no_direct_map kvm_arch_gmem_supports_no_dir= ect_map=0A= +#endif /* CONFIG_KVM_GUEST_MEMFD */=0A= +=0A= #endif /* _ASM_X86_KVM_HOST_H */=0A= diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c=0A= index fd1c4a36b593..32da7820823c 100644=0A= --- a/arch/x86/kvm/x86.c=0A= +++ b/arch/x86/kvm/x86.c=0A= @@ -14079,6 +14079,13 @@ void kvm_arch_gmem_invalidate(kvm_pfn_t start, kvm= _pfn_t end)=0A= kvm_x86_call(gmem_invalidate)(start, end);=0A= }=0A= #endif=0A= +=0A= +bool kvm_arch_gmem_supports_no_direct_map(struct kvm *kvm)=0A= +{=0A= + return can_set_direct_map() &&=0A= + kvm->arch.vm_type !=3D KVM_X86_TDX_VM &&=0A= + kvm->arch.vm_type !=3D KVM_X86_SNP_VM;=0A= +}=0A= #endif=0A= =0A= int kvm_spec_ctrl_test_value(u64 value)=0A= diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h=0A= index e8aa3d676c31..ce8c5fdf2752 100644=0A= --- a/include/linux/kvm_host.h=0A= +++ b/include/linux/kvm_host.h=0A= @@ -742,6 +742,15 @@ static inline u64 kvm_gmem_get_supported_flags(struct = kvm *kvm)=0A= }=0A= #endif=0A= =0A= +#ifdef CONFIG_KVM_GUEST_MEMFD=0A= +#ifndef kvm_arch_gmem_supports_no_direct_map=0A= +static inline bool kvm_arch_gmem_supports_no_direct_map(struct kvm *kvm)= =0A= +{=0A= + return false;=0A= +}=0A= +#endif=0A= +#endif /* CONFIG_KVM_GUEST_MEMFD */=0A= +=0A= #ifndef kvm_arch_has_readonly_mem=0A= static inline bool kvm_arch_has_readonly_mem(struct kvm *kvm)=0A= {=0A= -- =0A= 2.50.1=0A= =0A=