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V" , Emi Kisanuki , Vishal Annapurve , WeiLin.Chang@arm.com, Lorenzo Pieralisi Subject: [PATCH v16 24/45] KVM: arm64: Expose support for private memory Date: Mon, 3 Aug 2026 14:43:40 +0100 Message-ID: <20260803134403.80630-25-steven.price@arm.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260803134403.80630-1-steven.price@arm.com> References: <20260803134403.80630-1-steven.price@arm.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260803_064611_645988_6EB87A03 X-CRM114-Status: GOOD ( 10.95 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Select KVM_GENERIC_MEMORY_ATTRIBUTES and provide the necessary support functions. Reviewed-by: Suzuki K Poulose Signed-off-by: Steven Price --- Changes since v14: * Switch to guest_memfd in-place memory conversion and drop support for KVM_VM_MEMORY_ATTRIBUTES. Changes since v13: * Also update documentation to show that KVM_CAP_MEMORY_ATTRIBUTES is used on arm64. Changes since v12: * Only define kvm_arch_has_private_mem() when CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES is set to avoid build issues when KVM is disabled. Changes since v10: * KVM_GENERIC_PRIVATE_MEM replacd with KVM_GENERIC_MEMORY_ATTRIBUTES. Changes since v9: * Drop the #ifdef CONFIG_KVM_PRIVATE_MEM guard from the definition of kvm_arch_has_private_mem() Changes since v2: * Switch kvm_arch_has_private_mem() to a macro to avoid overhead of a function call. * Guard definitions of kvm_arch_{pre,post}_set_memory_attributes() with #ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES. * Early out in kvm_arch_post_set_memory_attributes() if the WARN_ON should trigger. --- arch/arm64/include/asm/kvm_host.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 15d42d1993bb..146c52f867c0 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -1510,6 +1510,8 @@ struct kvm *kvm_arch_alloc_vm(void); #define vcpu_is_protected(vcpu) kvm_vm_is_protected((vcpu)->kvm) +#define kvm_arch_has_private_mem(kvm) ((kvm)->arch.is_realm) + int kvm_arm_vcpu_finalize(struct kvm_vcpu *vcpu, int feature); bool kvm_arm_vcpu_is_finalized(struct kvm_vcpu *vcpu); -- 2.43.0