Re: [PATCH v15 17/37] KVM: arm64: Expose support for private memory
From: Suzuki K Poulose <suzuki.poulose@arm.com>
Date: 2026-07-16 10:25:34
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kvm, kvmarm, linux-coco, lkml
On 15/07/2026 15:28, Steven Price wrote:
Select KVM_GENERIC_MEMORY_ATTRIBUTES and provide the necessary support functions. Signed-off-by: Steven Price <steven.price@arm.com> ---
minor nit:
Changes since v14:
* Switch to guest_memfd in-place memory conversion and drop support
for KVM_VM_MEMORY_ATTRIBUTES.
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
quoted hunk ↗ jump to hunk
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 9b46b39ed11e..993ead6e6449 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h@@ -1509,6 +1509,8 @@ 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);