From: Binbin Wu <binbin.wu@linux.intel.com>
To: Sagi Shahar <sagis@google.com>
Cc: linux-kselftest@vger.kernel.org,
Paolo Bonzini <pbonzini@redhat.com>,
Shuah Khan <shuah@kernel.org>,
Sean Christopherson <seanjc@google.com>,
Ackerley Tng <ackerleytng@google.com>,
Ryan Afranji <afranji@google.com>,
Andrew Jones <ajones@ventanamicro.com>,
Isaku Yamahata <isaku.yamahata@intel.com>,
Erdem Aktas <erdemaktas@google.com>,
Rick Edgecombe <rick.p.edgecombe@intel.com>,
Roger Wang <runanwang@google.com>,
Oliver Upton <oliver.upton@linux.dev>,
"Pratik R. Sampat" <pratikrajesh.sampat@amd.com>,
Reinette Chatre <reinette.chatre@intel.com>,
Ira Weiny <ira.weiny@intel.com>, Chao Gao <chao.gao@intel.com>,
Chenyi Qiang <chenyi.qiang@intel.com>,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: Re: [PATCH v10 10/21] KVM: selftests: Set up TDX boot parameters region
Date: Mon, 8 Sep 2025 16:07:12 +0800 [thread overview]
Message-ID: <0e8a2035-caeb-4c75-9620-b65df07be1a0@linux.intel.com> (raw)
In-Reply-To: <20250904065453.639610-11-sagis@google.com>
On 9/4/2025 2:54 PM, Sagi Shahar wrote:
[...]
> +
> +void vm_tdx_load_common_boot_parameters(struct kvm_vm *vm)
> +{
> + struct td_boot_parameters *params =
> + addr_gpa2hva(vm, TD_BOOT_PARAMETERS_GPA);
> + uint32_t cr4;
> +
> + TEST_ASSERT_EQ(vm->mode, VM_MODE_PXXV48_4K);
> +
> + cr4 = kvm_get_default_cr4();
> +
> + /* TDX spec 11.6.2: CR4 bit MCE is fixed to 1 */
> + cr4 |= X86_CR4_MCE;
> +
> + /* Set this because UEFI also sets this up, to handle XMM exceptions */
I don't get it.
Could you elaborate it a bit?
> + cr4 |= X86_CR4_OSXMMEXCPT;
> +
> + /* TDX spec 11.6.2: CR4 bit VMXE and SMXE are fixed to 0 */
> + cr4 &= ~(X86_CR4_VMXE | X86_CR4_SMXE);
> +
> + /* Set parameters! */
> + params->cr0 = kvm_get_default_cr0();
> + params->cr3 = vm->pgd;
> + params->cr4 = cr4;
> + params->idtr.base = vm->arch.idt;
> + params->idtr.limit = kvm_get_default_idt_limit();
> + params->gdtr.base = vm->arch.gdt;
> + params->gdtr.limit = kvm_get_default_gdt_limit();
> +
> + TEST_ASSERT(params->cr0 != 0, "cr0 should not be 0");
> + TEST_ASSERT(params->cr3 != 0, "cr3 should not be 0");
> + TEST_ASSERT(params->cr4 != 0, "cr4 should not be 0");
> + TEST_ASSERT(params->gdtr.base != 0, "gdt base address should not be 0");
> + TEST_ASSERT(params->idtr.base != 0, "idt base address should not be 0");
> +}
> +
[...]
next prev parent reply other threads:[~2025-09-08 8:07 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-09-04 6:54 [PATCH v10 00/21] TDX KVM selftests Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 01/21] KVM: selftests: Allocate pgd in virt_map() as necessary Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 02/21] KVM: selftests: Expose functions to get default sregs values Sagi Shahar
2025-09-04 9:23 ` Binbin Wu
2025-09-04 6:54 ` [PATCH v10 03/21] KVM: selftests: Expose function to allocate guest vCPU stack Sagi Shahar
2025-09-04 9:27 ` Binbin Wu
2025-09-04 6:54 ` [PATCH v10 04/21] KVM: selftests: Update kvm_init_vm_address_properties() for TDX Sagi Shahar
2025-09-05 5:19 ` Binbin Wu
2025-09-04 6:54 ` [PATCH v10 05/21] KVM: selftests: Expose segment definitons to assembly files Sagi Shahar
2025-09-05 5:24 ` Binbin Wu
2025-09-04 6:54 ` [PATCH v10 06/21] KVM: selftests: Add kbuild definitons Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 07/21] KVM: selftests: Define structs to pass parameters to TDX boot code Sagi Shahar
2025-09-08 7:19 ` Binbin Wu
2025-09-04 6:54 ` [PATCH v10 08/21] KVM: selftests: Add " Sagi Shahar
2025-09-08 7:33 ` Binbin Wu
2025-09-04 6:54 ` [PATCH v10 09/21] KVM: selftests: Set up TDX boot code region Sagi Shahar
2025-09-08 7:39 ` Binbin Wu
2025-09-04 6:54 ` [PATCH v10 10/21] KVM: selftests: Set up TDX boot parameters region Sagi Shahar
2025-09-08 8:07 ` Binbin Wu [this message]
2025-09-25 17:13 ` Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 11/21] KVM: selftests: Add helper to initialize TDX VM Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 12/21] KVM: selftests: TDX: Use KVM_TDX_CAPABILITIES to validate TDs' attribute configuration Sagi Shahar
2025-09-08 9:22 ` Binbin Wu
2025-09-04 6:54 ` [PATCH v10 13/21] KVM: selftests: Add helpers to init TDX memory and finalize VM Sagi Shahar
2025-09-10 6:49 ` Binbin Wu
2025-09-04 6:54 ` [PATCH v10 14/21] KVM: selftests: Call TDX init when creating a new TDX vm Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 15/21] KVM: selftests: Setup memory regions for TDX on vm creation Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 16/21] KVM: selftests: Call KVM_TDX_INIT_VCPU when creating a new TDX vcpu Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 17/21] KVM: selftests: Set entry point for TDX guest code Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 18/21] KVM: selftests: Add support for TDX TDCALL from guest Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 19/21] KVM: selftests: Add wrapper for TDX MMIO " Sagi Shahar
2025-09-04 6:54 ` [PATCH v10 20/21] KVM: selftests: Add ucall support for TDX Sagi Shahar
2025-09-10 7:46 ` Binbin Wu
2025-09-04 6:54 ` [PATCH v10 21/21] KVM: selftests: Add TDX lifecycle test Sagi Shahar
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