From nobody Sun Dec 28 06:38:03 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3E1D0C4167B for ; Tue, 12 Dec 2023 20:48:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235258AbjLLUr5 (ORCPT ); Tue, 12 Dec 2023 15:47:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54668 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1377390AbjLLUr1 (ORCPT ); Tue, 12 Dec 2023 15:47:27 -0500 Received: from mail-pl1-x649.google.com (mail-pl1-x649.google.com [IPv6:2607:f8b0:4864:20::649]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BEF46199 for ; Tue, 12 Dec 2023 12:47:21 -0800 (PST) Received: by mail-pl1-x649.google.com with SMTP id d9443c01a7336-1d053953954so30442525ad.2 for ; Tue, 12 Dec 2023 12:47:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1702414041; x=1703018841; 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=QmMEuN8SsdugGRuBIQYyKlPPcc9Vaoj0O+wuwT+Ut3w=; b=bY9ZQrXEk9uUqUJX/cR5T0IlFdmHntxqRwEIJsuWPaqXeZINY+2c+mybbTyhCpl7aI fP5bdpADnFi/oZsKLR87MfkkS3hffU2rkj3dk8KRIUQ2Ek0vnvhUBTK0/BV0G0lkpxNu zspbebX2VkZdQqSY3UP+dJnEH9kBPyx983nuDz7YEe4rg8wPpT/GnLBzcmWQHODqW4ZC yb2l/0OnmkGNldfNn7wmyz0Q2VmgSV3+iz39bhexFvr0986y8/CRKBYTnPpAtc6FPyVN w5Y1RkBjaajP68j6cUSCkLW2boVOoFAnTu4z/QJBxZyOgYtzkFhQhWyZ2s/1/qimJKof dZ4g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702414041; x=1703018841; 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=QmMEuN8SsdugGRuBIQYyKlPPcc9Vaoj0O+wuwT+Ut3w=; b=XtJEgn6GboP1VATNkdarJpQcZ0UXco/f+WTLi5RRD/TU0b/LqiRguiU5VJnGGlN5Qd E3sJRbaGI4BFExEmcuzlWzYxI237Gnn/7h/aTHwZfU8qLnMuY10Ujuk3EpoJDuIqgqe5 Z0twOXbaCsA6+yECSyjlnDOieu4vFWFbWMofOVdWU/utV+PEQVLpLbvvC2ca3zEJ8voq lHm5hyU888Caiuf1om46w7FwWYlAafkkjmdxn75O2C7KW3mswDVExUt5B+TmS9WWtgzM g8S4CnTmPuK6ozUsm+lDRe3C6+6g651H5cIbfzoXCqIIxH8zhQArtw0ZNW2p8sfo6XQb ui8g== X-Gm-Message-State: AOJu0YxD7d/dbXQh4I+ZIMOgQHPQBgU64oB2NpvSqcwSJJIa/x47IMDc cZI7Jqb5B2WBmMJpMvUewXOMvY4qeQ== X-Google-Smtp-Source: AGHT+IFy2C6taXUGKUls3Pr3kqLUzkOO+fURcZtqBDqd2uoLbbxMihbyeQkPdCeSO4KqCcZOJ/XoDMTusQ== X-Received: from sagi.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:241b]) (user=sagis job=sendgmr) by 2002:a17:903:41cd:b0:1d2:ebcd:2341 with SMTP id u13-20020a17090341cd00b001d2ebcd2341mr54766ple.9.1702414040823; Tue, 12 Dec 2023 12:47:20 -0800 (PST) Date: Tue, 12 Dec 2023 12:46:27 -0800 In-Reply-To: <20231212204647.2170650-1-sagis@google.com> Mime-Version: 1.0 References: <20231212204647.2170650-1-sagis@google.com> X-Mailer: git-send-email 2.43.0.472.g3155946c3a-goog Message-ID: <20231212204647.2170650-13-sagis@google.com> Subject: [RFC PATCH v5 12/29] KVM: selftests: TDX: Add basic get_td_vmcall_info test From: Sagi Shahar To: linux-kselftest@vger.kernel.org, Ackerley Tng , Ryan Afranji , Erdem Aktas , Sagi Shahar , Isaku Yamahata Cc: Sean Christopherson , Paolo Bonzini , Shuah Khan , Peter Gonda , Haibo Xu , Chao Peng , Vishal Annapurve , Roger Wang , Vipin Sharma , jmattson@google.com, dmatlack@google.com, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, linux-mm@kvack.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" The test calls get_td_vmcall_info from the guest and verifies the expected returned values. Signed-off-by: Sagi Shahar Signed-off-by: Ackerley Tng Signed-off-by: Ryan Afranji Reviewed-by: Binbin Wu --- .../selftests/kvm/include/x86_64/tdx/tdx.h | 3 + .../kvm/include/x86_64/tdx/test_util.h | 27 +++++++ .../selftests/kvm/lib/x86_64/tdx/tdx.c | 23 ++++++ .../selftests/kvm/lib/x86_64/tdx/test_util.c | 46 +++++++++++ .../selftests/kvm/x86_64/tdx_vm_tests.c | 80 +++++++++++++++++++ 5 files changed, 179 insertions(+) diff --git a/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h b/tools/t= esting/selftests/kvm/include/x86_64/tdx/tdx.h index 1340c1070002..63788012bf94 100644 --- a/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h +++ b/tools/testing/selftests/kvm/include/x86_64/tdx/tdx.h @@ -5,6 +5,7 @@ #include #include "kvm_util_base.h" =20 +#define TDG_VP_VMCALL_GET_TD_VM_CALL_INFO 0x10000 #define TDG_VP_VMCALL_REPORT_FATAL_ERROR 0x10003 =20 #define TDG_VP_VMCALL_INSTRUCTION_IO 30 @@ -12,5 +13,7 @@ void handle_userspace_tdg_vp_vmcall_exit(struct kvm_vcpu = *vcpu); uint64_t tdg_vp_vmcall_instruction_io(uint64_t port, uint64_t size, uint64_t write, uint64_t *data); void tdg_vp_vmcall_report_fatal_error(uint64_t error_code, uint64_t data_g= pa); +uint64_t tdg_vp_vmcall_get_td_vmcall_info(uint64_t *r11, uint64_t *r12, + uint64_t *r13, uint64_t *r14); =20 #endif // SELFTEST_TDX_TDX_H diff --git a/tools/testing/selftests/kvm/include/x86_64/tdx/test_util.h b/t= ools/testing/selftests/kvm/include/x86_64/tdx/test_util.h index af0ddbfe8d71..8a9b6a1bec3e 100644 --- a/tools/testing/selftests/kvm/include/x86_64/tdx/test_util.h +++ b/tools/testing/selftests/kvm/include/x86_64/tdx/test_util.h @@ -4,6 +4,7 @@ =20 #include =20 +#include "kvm_util_base.h" #include "tdcall.h" =20 #define TDX_TEST_SUCCESS_PORT 0x30 @@ -111,4 +112,30 @@ void tdx_test_fatal_with_data(uint64_t error_code, uin= t64_t data_gpa); */ uint64_t tdx_test_report_to_user_space(uint32_t data); =20 +/** + * Report a 64 bit value from the guest to user space using TDG.VP.VMCALL + * call. + * + * Data is sent to host in 2 calls. LSB is sent (and needs to be read) fir= st. + */ +uint64_t tdx_test_send_64bit(uint64_t port, uint64_t data); + +/** + * Report a 64 bit value from the guest to user space using TDG.VP.VMCALL + * call. Data is reported on port TDX_TEST_REPORT_PORT. + */ +uint64_t tdx_test_report_64bit_to_user_space(uint64_t data); + +/** + * Read a 64 bit value from the guest in user space, sent using + * tdx_test_send_64bit(). + */ +uint64_t tdx_test_read_64bit(struct kvm_vcpu *vcpu, uint64_t port); + +/** + * Read a 64 bit value from the guest in user space, sent using + * tdx_test_report_64bit_to_user_space. + */ +uint64_t tdx_test_read_64bit_report_from_guest(struct kvm_vcpu *vcpu); + #endif // SELFTEST_TDX_TEST_UTIL_H diff --git a/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c b/tools/testi= ng/selftests/kvm/lib/x86_64/tdx/tdx.c index b854c3aa34ff..e5a9e13c62e2 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c +++ b/tools/testing/selftests/kvm/lib/x86_64/tdx/tdx.c @@ -64,3 +64,26 @@ void tdg_vp_vmcall_report_fatal_error(uint64_t error_cod= e, uint64_t data_gpa) =20 __tdx_hypercall(&args, 0); } + +uint64_t tdg_vp_vmcall_get_td_vmcall_info(uint64_t *r11, uint64_t *r12, + uint64_t *r13, uint64_t *r14) +{ + uint64_t ret; + struct tdx_hypercall_args args =3D { + .r11 =3D TDG_VP_VMCALL_GET_TD_VM_CALL_INFO, + .r12 =3D 0, + }; + + ret =3D __tdx_hypercall(&args, TDX_HCALL_HAS_OUTPUT); + + if (r11) + *r11 =3D args.r11; + if (r12) + *r12 =3D args.r12; + if (r13) + *r13 =3D args.r13; + if (r14) + *r14 =3D args.r14; + + return ret; +} diff --git a/tools/testing/selftests/kvm/lib/x86_64/tdx/test_util.c b/tools= /testing/selftests/kvm/lib/x86_64/tdx/test_util.c index 55c5a1e634df..3ae651cd5fac 100644 --- a/tools/testing/selftests/kvm/lib/x86_64/tdx/test_util.c +++ b/tools/testing/selftests/kvm/lib/x86_64/tdx/test_util.c @@ -7,6 +7,7 @@ #include =20 #include "kvm_util_base.h" +#include "tdx/tdcall.h" #include "tdx/tdx.h" #include "tdx/test_util.h" =20 @@ -53,3 +54,48 @@ uint64_t tdx_test_report_to_user_space(uint32_t data) TDG_VP_VMCALL_INSTRUCTION_IO_WRITE, &data_64); } + +uint64_t tdx_test_send_64bit(uint64_t port, uint64_t data) +{ + uint64_t err; + uint64_t data_lo =3D data & 0xFFFFFFFF; + uint64_t data_hi =3D (data >> 32) & 0xFFFFFFFF; + + err =3D tdg_vp_vmcall_instruction_io(port, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE, + &data_lo); + if (err) + return err; + + return tdg_vp_vmcall_instruction_io(port, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_WRITE, + &data_hi); +} + +uint64_t tdx_test_report_64bit_to_user_space(uint64_t data) +{ + return tdx_test_send_64bit(TDX_TEST_REPORT_PORT, data); +} + +uint64_t tdx_test_read_64bit(struct kvm_vcpu *vcpu, uint64_t port) +{ + uint32_t lo, hi; + uint64_t res; + + TDX_TEST_ASSERT_IO(vcpu, port, 4, TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); + lo =3D *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + vcpu_run(vcpu); + + TDX_TEST_ASSERT_IO(vcpu, port, 4, TDG_VP_VMCALL_INSTRUCTION_IO_WRITE); + hi =3D *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + res =3D hi; + res =3D (res << 32) | lo; + return res; +} + +uint64_t tdx_test_read_64bit_report_from_guest(struct kvm_vcpu *vcpu) +{ + return tdx_test_read_64bit(vcpu, TDX_TEST_REPORT_PORT); +} diff --git a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c b/tools/test= ing/selftests/kvm/x86_64/tdx_vm_tests.c index 1b30e6f5a569..569c8fb0a59f 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c @@ -260,6 +260,85 @@ void verify_td_cpuid(void) printf("\t ... PASSED\n"); } =20 +/* + * Verifies get_td_vmcall_info functionality. + */ +void guest_code_get_td_vmcall_info(void) +{ + uint64_t err; + uint64_t r11, r12, r13, r14; + + err =3D tdg_vp_vmcall_get_td_vmcall_info(&r11, &r12, &r13, &r14); + if (err) + tdx_test_fatal(err); + + err =3D tdx_test_report_64bit_to_user_space(r11); + if (err) + tdx_test_fatal(err); + + err =3D tdx_test_report_64bit_to_user_space(r12); + if (err) + tdx_test_fatal(err); + + err =3D tdx_test_report_64bit_to_user_space(r13); + if (err) + tdx_test_fatal(err); + + err =3D tdx_test_report_64bit_to_user_space(r14); + if (err) + tdx_test_fatal(err); + + tdx_test_success(); +} + +void verify_get_td_vmcall_info(void) +{ + struct kvm_vm *vm; + struct kvm_vcpu *vcpu; + + uint64_t r11, r12, r13, r14; + + vm =3D td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu =3D td_vcpu_add(vm, 0, guest_code_get_td_vmcall_info); + td_finalize(vm); + + printf("Verifying TD get vmcall info:\n"); + + /* Wait for guest to report r11 value */ + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + r11 =3D tdx_test_read_64bit_report_from_guest(vcpu); + + /* Wait for guest to report r12 value */ + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + r12 =3D tdx_test_read_64bit_report_from_guest(vcpu); + + /* Wait for guest to report r13 value */ + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + r13 =3D tdx_test_read_64bit_report_from_guest(vcpu); + + /* Wait for guest to report r14 value */ + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + r14 =3D tdx_test_read_64bit_report_from_guest(vcpu); + + TEST_ASSERT_EQ(r11, 0); + TEST_ASSERT_EQ(r12, 0); + TEST_ASSERT_EQ(r13, 0); + TEST_ASSERT_EQ(r14, 0); + + /* Wait for guest to complete execution */ + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_SUCCESS(vcpu); + + kvm_vm_free(vm); + printf("\t ... PASSED\n"); +} + int main(int argc, char **argv) { setbuf(stdout, NULL); @@ -273,6 +352,7 @@ int main(int argc, char **argv) run_in_new_process(&verify_report_fatal_error); run_in_new_process(&verify_td_ioexit); run_in_new_process(&verify_td_cpuid); + run_in_new_process(&verify_get_td_vmcall_info); =20 return 0; } --=20 2.43.0.472.g3155946c3a-goog