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a=ed25519; pk=cRi0fKzS5BMxlHyHY2pJv3w/1zcgfYKr6EYGYppdMYc= X-Developer-Signature: v=1; a=ed25519-sha256; t=1793922452; l=1858; i=wyihan@google.com; s=20260319; h=from:subject:message-id; bh=NM6v7ONAFm4dNOExo6KcnYRESswxRmJRZoN0Wgy5vKo=; b=rxaC7zWae+B+wvnUQ6WsS8EzDvG4JDUhu9mkJ8j0pMZd6hTfMyQSdNAu+OQERPGWCU9V6tAHa SdL98gWfLccB0vNbP/TFPIBxbhYs/6mQh+jYJKA0Ph6k8zpPzB7saQw X-Mailer: b4 0.14.3 Message-ID: <20261105-tdx-selftests-v16-13-2024e8fa517a@google.com> Subject: [PATCH v16 13/20] KVM: selftests: Load per-vCPU guest stack in TDX boot parameters From: Lisa Wang To: Andrew Jones , Ackerley Tng , Binbin Wu , Chao Gao , Chenyi Qiang , Dave Hansen , Erdem Aktas , Ira Weiny , Isaku Yamahata , Kiryl Shutsemau , linux-kselftest@vger.kernel.org, Paolo Bonzini , "Pratik R. Sampat" , Reinette Chatre , Rick Edgecombe , Roger Wang , Ryan Afranji , Sagi Shahar , Sean Christopherson , Shuah Khan , Xiaoyao Li , Oliver Upton Cc: Jeremiah McReynolds , kvm@vger.kernel.org, linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, x86@kernel.org, Lisa Wang Content-Type: text/plain; charset="utf-8" From: Sagi Shahar Allocate a guest stack for each vCPU and record the GVA in the TDX boot parameters region to allow proper vCPU initialization. Co-developed-by: Ackerley Tng Signed-off-by: Ackerley Tng Signed-off-by: Sagi Shahar Signed-off-by: Lisa Wang Reviewed-by: Binbin Wu Reviewed-by: Xiaoyao Li --- tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c b/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c index 1719dc1bb060..84127618f05c 100644 --- a/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c +++ b/tools/testing/selftests/kvm/lib/x86/tdx/tdx_util.c @@ -91,6 +91,20 @@ void tdx_vm_load_common_boot_parameters(struct kvm_vm *vm) params->gdtr.limit = kvm_get_default_gdt_limit(); } +static void tdx_vcpu_load_boot_parameters(struct kvm_vcpu *vcpu) +{ + struct td_boot_parameters *params = + addr_gpa2hva(vcpu->vm, TD_BOOT_PARAMETERS_GPA); + struct td_per_vcpu_parameters *vcpu_params = + ¶ms->per_vcpu[vcpu->id]; + gva_t esp_gva; + + esp_gva = vm_alloc_stack(vcpu->vm, DEFAULT_STACK_PGS); + TEST_ASSERT(esp_gva < (1ULL << 32), + "ESP GVA must be within 32-bit address space for 32-bit boot code"); + vcpu_params->esp_gva = esp_gva; +} + void tdx_vcpu_init(struct kvm_vcpu *vcpu) { struct kvm_cpuid2 *cpuid; @@ -100,6 +114,8 @@ void tdx_vcpu_init(struct kvm_vcpu *vcpu) vcpu_init_cpuid(vcpu, cpuid); free(cpuid); tdx_vcpu_ioctl(vcpu, KVM_TDX_INIT_VCPU, 0, NULL); + + tdx_vcpu_load_boot_parameters(vcpu); } static const struct kvm_tdx_capabilities *tdx_read_capabilities(struct kvm_vm *vm) -- 2.56.0.455.g6c5a503b38-goog