From nobody Thu Oct 2 01:01:42 2025 Received: from mail-pf1-f201.google.com (mail-pf1-f201.google.com [209.85.210.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6544331D394 for ; Thu, 25 Sep 2025 17:29:21 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.201 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758821363; cv=none; b=dQ3joN56Ff8q0lDs0pms+sQebPwac6pcQu6dBbTjnoHLRDN0Fem5ikTdhREKNRZ+IRNhzrYd8/FKBsQNO67EuvHzmKVAtROcXTWcJDUz5WxXOmpJgLf3rTU3jUkiOSTz8cJk8zvjHs9+jOMKJAFzMPVeqAzmhnkSsfWSRu5WVxk= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758821363; c=relaxed/simple; bh=DUH9fjzyZeNaJk1vwhK4spw7UfiiPdlKPNLppXCGf6A=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=usIzqlXVriFRYpbT0zh8ifn1rzErli4oht9ZczLpxYILPfUzGI4vA4PbW+tVGhyiAI3DHxG6bjYj2U10ZXOIa8SYA9oEQafJ4voaFVJDJ1eWLXp14uoVlaHUBNaOa5qX0B8TCioIzsqB7faLzaYypXEC4YA4GTFCZt+aYcJ53yY= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--sagis.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=dziUl5Tl; arc=none smtp.client-ip=209.85.210.201 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--sagis.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="dziUl5Tl" Received: by mail-pf1-f201.google.com with SMTP id d2e1a72fcca58-76e2e60221fso1804418b3a.0 for ; Thu, 25 Sep 2025 10:29:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1758821361; x=1759426161; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=UwluHtdboHgFkjYLYoAoxhCM/ZvR3gc2caEP86bvb2g=; b=dziUl5Tl5bolv7VWhbzYosLweLmTfkb5PAd+ZiCzZqdttYHlGyU2OHjLWDrGxYqzNY /Xdpx84m2/KP6U3+BXuGRyNKEL8iDptuDE//c1M6d9xdOzjMO9EJscBnDIbgWfbm3szH i5QpjWpaKjryA3UTvyqrWxxXz5PEg1Eno55YBuIS6tSbrQy0fuTaCeIMvonCIg8rS+V4 60ZQy1fE7i9upYH5pigfGMHnCRPV9XISxUuk8xgxEDSvpDKoKcCPA5msTHI5SnTvPTZp CJLQaSvux9LYvkr/FUXLjncI7cMm2e1ZNIMBb7EQ3yPAN4p+m947NJa4BYaOcLV0wWiE rUwQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758821361; x=1759426161; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=UwluHtdboHgFkjYLYoAoxhCM/ZvR3gc2caEP86bvb2g=; b=NJ4I0woAL/PkkczhWe3ljM+4ILwC0PpdgdZoZl7PbJBUCJw5SJUv1USwc4LkuXVyEV BElDbVXWOwNjf3H4r3akRg8B2I+CcSkr/UhS+zCWA1pt0YEiGeDo2ey+3jP3FLiaLERO ZPN4ZDRFidky+X+WDynpP2sPBt4XfjtmypSdPwZ/eVmXD1mqZF2FOVD0xzjIjvQ0U+/b 38KOhaHmOYTf/Fki/hWy80j9d1Mk4/KQ90aJ1xnPL2pJi72ljeX/QUNfWFHEbx8DgIQN MQH6nIA5n477bn6aqwrpmCMm3vyfMj0j9mHZhwMu3Y/lZxqHjCszCXA4bduz0PpAVQP4 n8HA== X-Gm-Message-State: AOJu0Yw44AhizXClizVDDzZrWtTkV631FEPVjAtyiPVbmXJM66C8CrZA BiOz22JX52A6KXg3kxgSzqKmRtYKSQfH3LGOHqTZC60gB86Lb8MteqJ8OzYiwc4Z+WqNDvlRS6W ELg== X-Google-Smtp-Source: AGHT+IG5bIjhoprp/h1DT6S8BYHcRFaJOqG+ix6N3YO2qGG59dz6qELsQRMpwnSKkFLz6xfS5/BegDK77g== X-Received: from pfug20.prod.google.com ([2002:a05:6a00:794:b0:77f:3341:eef2]) (user=sagis job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:194f:b0:77d:2ca7:84be with SMTP id d2e1a72fcca58-780fcea2dd6mr4953965b3a.18.1758821360611; Thu, 25 Sep 2025 10:29:20 -0700 (PDT) Date: Thu, 25 Sep 2025 10:28:41 -0700 In-Reply-To: <20250925172851.606193-1-sagis@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250925172851.606193-1-sagis@google.com> X-Mailer: git-send-email 2.51.0.536.g15c5d4f767-goog Message-ID: <20250925172851.606193-14-sagis@google.com> Subject: [PATCH v11 13/21] KVM: selftests: Add helpers to init TDX memory and finalize VM From: Sagi Shahar To: linux-kselftest@vger.kernel.org, Paolo Bonzini , Shuah Khan , Sean Christopherson , Ackerley Tng , Ryan Afranji , Andrew Jones , Isaku Yamahata , Erdem Aktas , Rick Edgecombe , Sagi Shahar , Roger Wang , Binbin Wu , Oliver Upton , "Pratik R. Sampat" , Reinette Chatre , Ira Weiny , Chao Gao , Chenyi Qiang Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" From: Ackerley Tng TDX protected memory needs to be measured and encrypted before it can be used by the guest. Traverse the VM's memory regions and initialize all the protected ranges by calling KVM_TDX_INIT_MEM_REGION. Once all the memory is initialized, the VM can be finalized by calling KVM_TDX_FINALIZE_VM. Signed-off-by: Ackerley Tng Co-developed-by: Erdem Aktas Signed-off-by: Erdem Aktas Co-developed-by: Sagi Shahar Signed-off-by: Sagi Shahar --- .../selftests/kvm/include/x86/tdx/tdx_util.h | 2 + .../selftests/kvm/lib/x86/tdx/tdx_util.c | 58 +++++++++++++++++++ 2 files changed, 60 insertions(+) diff --git a/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h b/tools= /testing/selftests/kvm/include/x86/tdx/tdx_util.h index a2509959c7ce..2467b6c35557 100644 --- a/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h +++ b/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h @@ -71,4 +71,6 @@ void vm_tdx_load_common_boot_parameters(struct kvm_vm *vm= ); void vm_tdx_load_vcpu_boot_parameters(struct kvm_vm *vm, struct kvm_vcpu *= vcpu); void vm_tdx_set_vcpu_entry_point(struct kvm_vcpu *vcpu, void *guest_code); =20 +void vm_tdx_finalize(struct kvm_vm *vm); + #endif // SELFTESTS_TDX_TDX_UTIL_H diff --git a/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c b/tools/tes= ting/selftests/kvm/lib/x86/tdx/tdx_util.c index 2551b3eac8f8..53cfadeff8de 100644 --- a/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c +++ b/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c @@ -270,3 +270,61 @@ void vm_tdx_init_vm(struct kvm_vm *vm, uint64_t attrib= utes) =20 free(init_vm); } + +static void tdx_init_mem_region(struct kvm_vm *vm, void *source_pages, + uint64_t gpa, uint64_t size) +{ + uint32_t metadata =3D KVM_TDX_MEASURE_MEMORY_REGION; + struct kvm_tdx_init_mem_region mem_region =3D { + .source_addr =3D (uint64_t)source_pages, + .gpa =3D gpa, + .nr_pages =3D size / PAGE_SIZE, + }; + struct kvm_vcpu *vcpu; + + vcpu =3D list_first_entry_or_null(&vm->vcpus, struct kvm_vcpu, list); + + TEST_ASSERT((mem_region.nr_pages > 0) && + ((mem_region.nr_pages * PAGE_SIZE) =3D=3D size), + "Cannot add partial pages to the guest memory.\n"); + TEST_ASSERT(((uint64_t)source_pages & (PAGE_SIZE - 1)) =3D=3D 0, + "Source memory buffer is not page aligned\n"); + vm_tdx_vcpu_ioctl(vcpu, KVM_TDX_INIT_MEM_REGION, metadata, &mem_region); +} + +static void load_td_private_memory(struct kvm_vm *vm) +{ + struct userspace_mem_region *region; + int ctr; + + hash_for_each(vm->regions.slot_hash, ctr, region, slot_node) { + const struct sparsebit *protected_pages =3D region->protected_phy_pages; + const vm_paddr_t gpa_base =3D region->region.guest_phys_addr; + const uint64_t hva_base =3D region->region.userspace_addr; + const sparsebit_idx_t lowest_page_in_region =3D gpa_base >> vm->page_shi= ft; + sparsebit_idx_t i, j; + + if (!sparsebit_any_set(protected_pages)) + continue; + + TEST_ASSERT(region->region.guest_memfd !=3D -1, + "TD private memory must be backed by guest_memfd"); + + sparsebit_for_each_set_range(protected_pages, i, j) { + const uint64_t size_to_load =3D (j - i + 1) * vm->page_size; + const uint64_t offset =3D + (i - lowest_page_in_region) * vm->page_size; + const uint64_t hva =3D hva_base + offset; + const uint64_t gpa =3D gpa_base + offset; + + vm_mem_set_private(vm, gpa, size_to_load); + tdx_init_mem_region(vm, (void *)hva, gpa, size_to_load); + } + } +} + +void vm_tdx_finalize(struct kvm_vm *vm) +{ + load_td_private_memory(vm); + vm_tdx_vm_ioctl(vm, KVM_TDX_FINALIZE_VM, 0, NULL); +} --=20 2.51.0.536.g15c5d4f767-goog