From nobody Thu Oct 2 01:01:47 2025 Received: from mail-pf1-f202.google.com (mail-pf1-f202.google.com [209.85.210.202]) (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 B738331B123 for ; Thu, 25 Sep 2025 17:29:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.210.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758821360; cv=none; b=eK8wHsh3WulEwB2WL7GcpIlA+LtGAu6cgWio1Dn4XIowcPfycEgB7HKUQfVPGNXfGzYdO5H2xuFqSLMYYheLSEVTugNu7YpS/ZrsOyk37MoApHtciKcAKJLcSey5dcx8Bd7rt8VZSN50clkxOotY4ScGDZ49VaDL7O4yKdNR4fY= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1758821360; c=relaxed/simple; bh=Bu94ep6LXVCBGk9mhGFiOfvC3iFU5bTCmLww/QF+Y0w=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=BjtJrXEUC/pNNVNpOp4nHKqDu6sJXDWQ0Whr2QC7fTmtOjs7kio6PjcMlyS8gFA/Sd647++gRJcq4ev8XXnlXDp2wBlkfkfm3H2z9Gk/Gadb68V6oMQG+BsoVNygLc8N7RYmDoG8Yar1+bA0gMKAU2/2MGaf/OgLzbPY+bHg9tI= 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=a157fuen; arc=none smtp.client-ip=209.85.210.202 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="a157fuen" Received: by mail-pf1-f202.google.com with SMTP id d2e1a72fcca58-77f5e6a324fso2263421b3a.0 for ; Thu, 25 Sep 2025 10:29:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1758821356; x=1759426156; 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=+dlLssYObMpDc3Mig0BnX1nAYbBtGHYEAQU3DA8pmFQ=; b=a157fuenyUnGcWey9HMUtsceb49OOctA1xOEjoRKrG3L/uf4LqLE0kfOQL83L/ilkv xXXaH5BYv0keQ+offAgB2ziw209O3gykypDj/401xRBdtA3isq9GfO/EOFPBRE/D8Imh Kh4VQKoYoXwPiPTQLc18KkWBgQsT4ozDV0yNRZEEjTG7pdbkSygqLhqDvujwDHG/IlfG eNcESJoeYexTN62M5YzEyk5niu4IqW0GjAjBx7jDUFjYjary4f78zaywmnQ2P5Vdq2s2 iVjU3jdxgwRZcDIVmObfW87zcACE/TYBJ5vGIEOAVzjL55TkkQy2oJaJBQjh1a5+OspU rROA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1758821356; x=1759426156; 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=+dlLssYObMpDc3Mig0BnX1nAYbBtGHYEAQU3DA8pmFQ=; b=pNv6x8gslMHH1LJwYLyJgeQ6bsiKjx/yXtCCHPljMdcFaPEdhc7FSJAUqtj5PZJ3Cv 8F427/kZcEs9D91K0dA7CsTj+MOONb9HuLuOLsjL2Msa/wtvHL2AO3p+akYdZbkLmXY1 zE6DfzXE+xdaQ6t/KffcZTF8j3e//bcT41vaEPTfWVRCxX7tVRmqG9CFSDXbRsX1sGtO nsoHyI5dMS1ajYOyg+9+Gypa8tINfljLZUTPsKBelkKsPCNRCf7R7qP71mrG+3fdy8Sz tCi/Cm5y13estAzrTPltf/j5Pe76WsXr6MHQ1ssRZ/HeBf+WZPKftQl5ZWQ87hGInEL9 Nj0w== X-Gm-Message-State: AOJu0YzF30VXb5d4kzz25O81HiCgCNhDIiJrE4opivPTVHK+bplrrzph iz4Gi9KXl1tjr3XYGRkNDmgBt0dyh7nkyhhBiWktpImavhQA7pR7cE+ozbSovHfu4l2gkhxZD+3 xlg== X-Google-Smtp-Source: AGHT+IE73CoIJzyKmVA8thi2OhWNCikU0g0L+pUzECN/cCGBVKYk3F06bo+KSf76r+1vZuQUYCZQe/QjcA== X-Received: from pfbkh3.prod.google.com ([2002:a05:6a00:9443:b0:772:749b:de38]) (user=sagis job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:244e:b0:24e:84c9:e986 with SMTP id adf61e73a8af0-2e7c79c5ac6mr5667587637.15.1758821356049; Thu, 25 Sep 2025 10:29:16 -0700 (PDT) Date: Thu, 25 Sep 2025 10:28:38 -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: <20250925172851.606193-11-sagis@google.com> Subject: [PATCH v11 10/21] KVM: selftests: Set up TDX boot parameters region 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" Allocate memory for TDX boot parameters and define the utility functions necessary to fill this memory with the boot parameters. Co-developed-by: Ackerley Tng Signed-off-by: Ackerley Tng Signed-off-by: Sagi Shahar --------------------------------------------- Changes from v10: * Removed code for setting up X86_CR4_OSXMMEXCPT bit. At least for now it is not needed and the test pass without it. --- .../selftests/kvm/include/x86/tdx/tdx_util.h | 4 ++ .../selftests/kvm/lib/x86/tdx/tdx_util.c | 72 +++++++++++++++++++ 2 files changed, 76 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 ec05bcd59145..dafdc7e46abe 100644 --- a/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h +++ b/tools/testing/selftests/kvm/include/x86/tdx/tdx_util.h @@ -12,5 +12,9 @@ static inline bool is_tdx_vm(struct kvm_vm *vm) } =20 void vm_tdx_setup_boot_code_region(struct kvm_vm *vm); +void vm_tdx_setup_boot_parameters_region(struct kvm_vm *vm, uint32_t nr_ru= nnable_vcpus); +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 #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 a1cf12de9d56..f3b69923e928 100644 --- a/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c +++ b/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c @@ -5,10 +5,12 @@ #include "kvm_util.h" #include "processor.h" #include "tdx/td_boot.h" +#include "tdx/td_boot_asm.h" #include "tdx/tdx_util.h" =20 /* Arbitrarily selected to avoid overlaps with anything else */ #define TD_BOOT_CODE_SLOT 20 +#define TD_BOOT_PARAMETERS_SLOT 21 =20 #define X86_RESET_VECTOR 0xfffffff0ul #define X86_RESET_VECTOR_SIZE 16 @@ -52,3 +54,73 @@ void vm_tdx_setup_boot_code_region(struct kvm_vm *vm) hva[1] =3D 256 - 2 - TD_BOOT_CODE_SIZE; hva[2] =3D 0xcc; } + +void vm_tdx_setup_boot_parameters_region(struct kvm_vm *vm, uint32_t nr_ru= nnable_vcpus) +{ + size_t boot_params_size =3D + sizeof(struct td_boot_parameters) + + nr_runnable_vcpus * sizeof(struct td_per_vcpu_parameters); + int npages =3D DIV_ROUND_UP(boot_params_size, PAGE_SIZE); + vm_paddr_t gpa; + + vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, + TD_BOOT_PARAMETERS_GPA, + TD_BOOT_PARAMETERS_SLOT, npages, + KVM_MEM_GUEST_MEMFD); + gpa =3D vm_phy_pages_alloc(vm, npages, TD_BOOT_PARAMETERS_GPA, TD_BOOT_PA= RAMETERS_SLOT); + TEST_ASSERT(gpa =3D=3D TD_BOOT_PARAMETERS_GPA, "Failed vm_phy_pages_alloc= \n"); + + virt_map(vm, TD_BOOT_PARAMETERS_GPA, TD_BOOT_PARAMETERS_GPA, npages); +} + +void vm_tdx_load_common_boot_parameters(struct kvm_vm *vm) +{ + struct td_boot_parameters *params =3D + addr_gpa2hva(vm, TD_BOOT_PARAMETERS_GPA); + uint32_t cr4; + + TEST_ASSERT_EQ(vm->mode, VM_MODE_PXXV48_4K); + + cr4 =3D kvm_get_default_cr4(); + + /* TDX spec 11.6.2: CR4 bit MCE is fixed to 1 */ + cr4 |=3D X86_CR4_MCE; + + /* TDX spec 11.6.2: CR4 bit VMXE and SMXE are fixed to 0 */ + cr4 &=3D ~(X86_CR4_VMXE | X86_CR4_SMXE); + + /* Set parameters! */ + params->cr0 =3D kvm_get_default_cr0(); + params->cr3 =3D vm->pgd; + params->cr4 =3D cr4; + params->idtr.base =3D vm->arch.idt; + params->idtr.limit =3D kvm_get_default_idt_limit(); + params->gdtr.base =3D vm->arch.gdt; + params->gdtr.limit =3D kvm_get_default_gdt_limit(); + + TEST_ASSERT(params->cr0 !=3D 0, "cr0 should not be 0"); + TEST_ASSERT(params->cr3 !=3D 0, "cr3 should not be 0"); + TEST_ASSERT(params->cr4 !=3D 0, "cr4 should not be 0"); + TEST_ASSERT(params->gdtr.base !=3D 0, "gdt base address should not be 0"); + TEST_ASSERT(params->idtr.base !=3D 0, "idt base address should not be 0"); +} + +void vm_tdx_load_vcpu_boot_parameters(struct kvm_vm *vm, struct kvm_vcpu *= vcpu) +{ + struct td_boot_parameters *params =3D + addr_gpa2hva(vm, TD_BOOT_PARAMETERS_GPA); + struct td_per_vcpu_parameters *vcpu_params =3D + ¶ms->per_vcpu[vcpu->id]; + + vcpu_params->esp_gva =3D kvm_allocate_vcpu_stack(vm); +} + +void vm_tdx_set_vcpu_entry_point(struct kvm_vcpu *vcpu, void *guest_code) +{ + struct td_boot_parameters *params =3D + addr_gpa2hva(vcpu->vm, TD_BOOT_PARAMETERS_GPA); + struct td_per_vcpu_parameters *vcpu_params =3D + ¶ms->per_vcpu[vcpu->id]; + + vcpu_params->guest_code =3D (uint64_t)guest_code; +} --=20 2.51.0.536.g15c5d4f767-goog