From nobody Sun Oct 5 07:26:06 2025 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (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 DD8C027E074 for ; Thu, 7 Aug 2025 20:17:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754597830; cv=none; b=MsFLGMSYS92XITlNQT7DnH/A/MrTuZPb3DauqfrjlW9ibfyi2vBznPKuTEnIzdBMWkhMDFEx0ZZCF9S6+DyRI3tRBZ7wk3QpcJLy2ictpu8/qDp/HaFwmHcqGOMsO8/U/G9vQJBnKn5FtXE1OqrGev9G9WZQF9H752TBqTU/Txg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754597830; c=relaxed/simple; bh=xl6zU/zvfsPbrUYNAsccEMJ9PE4FINSoXlDmAhqFRU0=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=nppP9yGD+IVbi9PLKwoxWDNcXdeg1b6P3corr4PURl97HPOeCYxzIQGorpts2wqY33am1+velAlvgmtQCA6OrTYxQmXwckF/QS0io+wSKn+V9T69oMxPqyPmVGGakXAWanhBzu+Whw906sLWFayMpZxAg6v5aGt1evlsQqGhNNU= 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=QBpt/ucI; arc=none smtp.client-ip=209.85.216.74 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="QBpt/ucI" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-32147620790so1481743a91.1 for ; Thu, 07 Aug 2025 13:17:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1754597828; x=1755202628; 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=druJe0O0RVRgmBCK/d78lVDLhUI96RPYL//ATHIqQ7o=; b=QBpt/ucI7IAdNccqbRTrH7rREGi4RTnWrmWgvdsXTKgAXQa3Ay07HpUSbSWKJhZ1Sh ncc3VX6i/6AwDrgK4PrS7tUFXybIBdtx1CytoeL7jSnDn9AxB2U/qgMmLX5iXHJm10+h pmB4LaZLqXd3qY0c9y3tsnP0/K44REyj/MFo+etzAQxI1yrb5/Gn5EPqJvJ+dGKwCRAV G10jVTMtA4QliHC3l79LqyL29OLdYJKPElXpPy2eKpWH9/XEO2HTr8izA3ne53eL+wHv Ke3o3kqZtlb2IO2ztFtwoshPLcUtrn+iCHwW0CNvE9ZsteoNjV/oiy1bh5JVANU7m0N5 9+cQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754597828; x=1755202628; 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=druJe0O0RVRgmBCK/d78lVDLhUI96RPYL//ATHIqQ7o=; b=RibV4J1mAjnHogZix6BVO02pydn7hk1AK03n4OrsFH6cIs4eon8NkjRRTS/5H+QMsO OIlP1q974jcKNcKv9YJ35OHK5K2wFX0K53UF2pOl6gnL0hwt+9PNTriKvld/JGol2/6R 2egeJo2eyWlesnJtr2d9P7BRchmomu0UCxqWyUhWXrPVI3XdHRlJ69ldZfMqtgbY+brc thfCGidnoNBftmPjCqtQSaIJVaeJTv7BEErgYtonsiEIIdZVBfWGbB1L34p+NtWoL94w hcy0MslPe3QLkBEq/i8clvhm0/4Bef/oPJQVD/4skdjSWyWkcTdy5e4g4JZirmRorgGS VaHA== X-Gm-Message-State: AOJu0YzSWLWkEyYMg0Q4GviiPMOQS2+nbEAVodXKLsnd2LA8KVpm7MOm VgK9XMUIvvzznZGjSHB1Ka/3WeEGA2Ew2gM2hPssVlCYazojGowTfgQGzBMB3hi4++R/IEZPgMs /Ng== X-Google-Smtp-Source: AGHT+IGUSVXeE5dAKzb1GPjhE8I5Q7KUcp1AD2kuBLfcvmXIX2vkHNMZ7UR9w2EOlvLEGked2h5t1ulMcQ== X-Received: from pjpy17.prod.google.com ([2002:a17:90a:a411:b0:321:370d:cae5]) (user=sagis job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:4a44:b0:31f:134:94ae with SMTP id 98e67ed59e1d1-321839e516dmr510895a91.11.1754597827850; Thu, 07 Aug 2025 13:17:07 -0700 (PDT) Date: Thu, 7 Aug 2025 13:16:16 -0700 In-Reply-To: <20250807201628.1185915-1-sagis@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250807201628.1185915-1-sagis@google.com> X-Mailer: git-send-email 2.51.0.rc0.155.g4a0f42376b-goog Message-ID: <20250807201628.1185915-21-sagis@google.com> Subject: [PATCH v8 20/30] KVM: selftests: TDX: Add TDX CPUID TDVMCALL test 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 Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This test issues a CPUID TDVMCALL from inside the guest to get the CPUID values as seen by KVM. Co-developed-by: Isaku Yamahata Signed-off-by: Isaku Yamahata Signed-off-by: Sagi Shahar --- .../selftests/kvm/include/x86/tdx/tdx.h | 4 + tools/testing/selftests/kvm/lib/x86/tdx/tdx.c | 25 ++++++ tools/testing/selftests/kvm/x86/tdx_vm_test.c | 78 ++++++++++++++++++- 3 files changed, 106 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/include/x86/tdx/tdx.h b/tools/test= ing/selftests/kvm/include/x86/tdx/tdx.h index 2fd67c3e5128..060158cb046b 100644 --- a/tools/testing/selftests/kvm/include/x86/tdx/tdx.h +++ b/tools/testing/selftests/kvm/include/x86/tdx/tdx.h @@ -9,6 +9,7 @@ #define TDG_VP_VMCALL_GET_TD_VM_CALL_INFO 0x10000 #define TDG_VP_VMCALL_REPORT_FATAL_ERROR 0x10003 =20 +#define TDG_VP_VMCALL_INSTRUCTION_CPUID 10 #define TDG_VP_VMCALL_INSTRUCTION_HLT 12 #define TDG_VP_VMCALL_INSTRUCTION_IO 30 #define TDG_VP_VMCALL_INSTRUCTION_RDMSR 31 @@ -27,5 +28,8 @@ uint64_t tdg_vp_vmcall_ve_request_mmio_read(uint64_t addr= ess, uint64_t size, uint64_t *data_out); uint64_t tdg_vp_vmcall_ve_request_mmio_write(uint64_t address, uint64_t si= ze, uint64_t data_in); +uint64_t tdg_vp_vmcall_instruction_cpuid(uint32_t eax, uint32_t ecx, + uint32_t *ret_eax, uint32_t *ret_ebx, + uint32_t *ret_ecx, uint32_t *ret_edx); =20 #endif // SELFTEST_TDX_TDX_H diff --git a/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c b/tools/testing/= selftests/kvm/lib/x86/tdx/tdx.c index d61940fe7df4..fb391483d2fa 100644 --- a/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c +++ b/tools/testing/selftests/kvm/lib/x86/tdx/tdx.c @@ -137,3 +137,28 @@ uint64_t tdg_vp_vmcall_ve_request_mmio_write(uint64_t = address, uint64_t size, =20 return __tdx_hypercall(&args, 0); } + +uint64_t tdg_vp_vmcall_instruction_cpuid(uint32_t eax, uint32_t ecx, + uint32_t *ret_eax, uint32_t *ret_ebx, + uint32_t *ret_ecx, uint32_t *ret_edx) +{ + struct tdx_hypercall_args args =3D { + .r11 =3D TDG_VP_VMCALL_INSTRUCTION_CPUID, + .r12 =3D eax, + .r13 =3D ecx, + }; + uint64_t ret; + + ret =3D __tdx_hypercall(&args, TDX_HCALL_HAS_OUTPUT); + + if (ret_eax) + *ret_eax =3D args.r12; + if (ret_ebx) + *ret_ebx =3D args.r13; + if (ret_ecx) + *ret_ecx =3D args.r14; + if (ret_edx) + *ret_edx =3D args.r15; + + return ret; +} diff --git a/tools/testing/selftests/kvm/x86/tdx_vm_test.c b/tools/testing/= selftests/kvm/x86/tdx_vm_test.c index 6ad675a93eeb..2f75f12d2a44 100644 --- a/tools/testing/selftests/kvm/x86/tdx_vm_test.c +++ b/tools/testing/selftests/kvm/x86/tdx_vm_test.c @@ -885,6 +885,80 @@ void verify_mmio_writes(void) printf("\t ... PASSED\n"); } =20 +/* + * Verifies CPUID TDVMCALL functionality. + * The guest will then send the values to userspace using an IO write to be + * checked against the expected values. + */ +void guest_code_cpuid_tdcall(void) +{ + uint32_t eax, ebx, ecx, edx; + uint64_t err; + + /* Read CPUID leaf 0x1 from host. */ + err =3D tdg_vp_vmcall_instruction_cpuid(/*eax=3D*/1, /*ecx=3D*/0, + &eax, &ebx, &ecx, &edx); + tdx_assert_error(err); + + err =3D tdx_test_report_to_user_space(eax); + tdx_assert_error(err); + + err =3D tdx_test_report_to_user_space(ebx); + tdx_assert_error(err); + + err =3D tdx_test_report_to_user_space(ecx); + tdx_assert_error(err); + + err =3D tdx_test_report_to_user_space(edx); + tdx_assert_error(err); + + tdx_test_success(); +} + +void verify_td_cpuid_tdcall(void) +{ + struct kvm_cpuid_entry2 *cpuid_entry; + uint32_t eax, ebx, ecx, edx; + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + + vm =3D td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu =3D td_vcpu_add(vm, 0, guest_code_cpuid_tdcall); + td_finalize(vm); + + printf("Verifying TD CPUID TDVMCALL:\n"); + + /* Wait for guest to report CPUID values */ + tdx_run(vcpu); + eax =3D tdx_test_read_report_from_guest(vcpu); + + tdx_run(vcpu); + ebx =3D tdx_test_read_report_from_guest(vcpu); + + tdx_run(vcpu); + ecx =3D tdx_test_read_report_from_guest(vcpu); + + tdx_run(vcpu); + edx =3D tdx_test_read_report_from_guest(vcpu); + + tdx_run(vcpu); + tdx_test_assert_success(vcpu); + + /* Get KVM CPUIDs for reference */ + cpuid_entry =3D vcpu_get_cpuid_entry(vcpu, 1); + TEST_ASSERT(cpuid_entry, "CPUID entry missing\n"); + + TEST_ASSERT_EQ(cpuid_entry->eax, eax); + /* Mask lapic ID when comparing ebx. */ + TEST_ASSERT_EQ(cpuid_entry->ebx & ~0xFF000000, ebx & ~0xFF000000); + TEST_ASSERT_EQ(cpuid_entry->ecx, ecx); + TEST_ASSERT_EQ(cpuid_entry->edx, edx); + + kvm_vm_free(vm); + printf("\t ... PASSED\n"); +} + int main(int argc, char **argv) { ksft_print_header(); @@ -892,7 +966,7 @@ int main(int argc, char **argv) if (!is_tdx_enabled()) ksft_exit_skip("TDX is not supported by the KVM. Exiting.\n"); =20 - ksft_set_plan(12); + ksft_set_plan(13); ksft_test_result(!run_in_new_process(&verify_td_lifecycle), "verify_td_lifecycle\n"); ksft_test_result(!run_in_new_process(&verify_report_fatal_error), @@ -917,6 +991,8 @@ int main(int argc, char **argv) "verify_mmio_reads\n"); ksft_test_result(!run_in_new_process(&verify_mmio_writes), "verify_mmio_writes\n"); + ksft_test_result(!run_in_new_process(&verify_td_cpuid_tdcall), + "verify_td_cpuid_tdcall\n"); =20 ksft_finished(); return 0; --=20 2.51.0.rc0.155.g4a0f42376b-goog