From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f201.google.com (mail-pg1-f201.google.com [209.85.215.201]) (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 48168278E7C for ; Thu, 7 Aug 2025 20:17:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754597822; cv=none; b=IaF5gPJmV9d0krpBFWRkqLrKWvinmlMwvS32ibD+i3ZTFz6l29MVXj+B4BZj/3eJFsTuvI9Qx4cL6tPDsPwqAP7einDR1sekLCSU2PDQMQKSxU0MxPBfQ++WgCLpcJMr/IfOaSMO2l5Oc5QmltQ1DBKK6FsmYsVHuRcX8leklnY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1754597822; c=relaxed/simple; bh=FXDAADzMusIlbN7uUCnCYkOeFjIxbEHc+vE0DIROQ/Y=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=sOi9q1pPtFoG90gVzbOMWz2a9f1r9Hxwf+8hRmpB4AE3N6qeX30unp1ul1SY0QcvsAxydqWRiRmKW6LO6zecQ4u7qoLYsfLRZlr7QA8bvRCjb1esrvSHq5UCnW83v9jHmpKNUvSLA4XpEDAIHHJ+6mZf3Kx2zfUhn1VNRx5wcos= 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=efOLIOlV; arc=none smtp.client-ip=209.85.215.201 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="efOLIOlV" Received: by mail-pg1-f201.google.com with SMTP id 41be03b00d2f7-b00e4358a34so1133796a12.0 for ; Thu, 07 Aug 2025 13:17:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1754597819; x=1755202619; 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=opBjGbCpw5awd4Cotp1/0PR79/5V/O1FhnxLn+p7yqU=; b=efOLIOlVCj7m+gGYL+R9nGG03NoXaJjiqKoKeHv/3yk4A8n0PGIhs7Kc0GaEMj4lU1 nLFhOYiZ3H8Ekhg3Phggqjtr8ismctvuaYJ+W8sMpLCkKQWOR2KGgaefPXKQ2i9ABFrm k9BhV04ePEUENoo0+dxctVI+XqG7E7m8fRpfCuce5nZz83CoD42Z8EA4e9EZ1gnriRyd G1BxU8zR8H++fwGu9fChwoGq+y01Mjki1de+783LnfI1CMwzm1GQ9rCne75bZBAl+/Fd lX7xsaulKaWt3xbX4Bqt3xLMRsUjKJFbHviK5E1KfsbCA1hNJ7IlaccmKo6ndTHEvrdj mzIA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1754597819; x=1755202619; 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=opBjGbCpw5awd4Cotp1/0PR79/5V/O1FhnxLn+p7yqU=; b=UHsDjrFGtjc5h5TxcZp/q9HljX+ttSyYnkd249wbn9d1gAEXBSnfRsMgzBPKv0+iiQ M6Bpve90fQhEIoIqh2z3aQBAodl12IWnh1TcBlYnmHJ1qe4I3puMihIaBGGEqsFM70X2 c4nqwDPgpRde/awdmOQgSirUJLkn3gCOhbALoNEOd8wFGcnNN8Mmjc/eS+RejtKiSGkr C5JEVyCensjc9U7RlIVIxAwnTlM6Dl59V8I/AVCwS1r3gseuaOGQG7peqwgrfZCVhosh d7KC0UUpKwZqUhSnivTppaOf14yMHxchM4rQfzbAeDHNuTn0RJ9MHYJ+62lVB53o54w9 kAUA== X-Gm-Message-State: AOJu0Yx0rDngDw6hl2Sfp3ZPPnMwf4QW+ZiPuOMD6CBijyLX2PMNwWCZ 8MR6RtzKHSY0k9QiMsr0mQy3DFWvYltG/QXIW5Kbk3UVjdpgPQTk0opqRJ7mKYKgAGCOebcgLpo +q7Ivnn8o2vGj5t62fNSeiTa9VNWmBCNPnCIkNRVABVfmdMKS0DsZaSh2RWNzCTqpsgTtB/0OqZ Bb5VMV6sMrNGcvDx+cstR8Ixj1LJ5IpM6x3wKjy7+dmm0= X-Google-Smtp-Source: AGHT+IFg9IMl11uY0VA/UeYt/Ymn5WDhQiYfRt4ouUB8jhAWey7rdPY7dxuMJ50BLvXQ8lFPaeBoEOoCiA== X-Received: from pgbdp12.prod.google.com ([2002:a05:6a02:f0c:b0:b42:306b:d8b]) (user=sagis job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a20:a121:b0:240:1a3a:d7ed with SMTP id adf61e73a8af0-24055200eb1mr348212637.41.1754597819059; Thu, 07 Aug 2025 13:16:59 -0700 (PDT) Date: Thu, 7 Aug 2025 13:16:10 -0700 In-Reply-To: <20250807201628.1185915-1-sagis@google.com> Precedence: bulk X-Mailing-List: linux-kselftest@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: <20250807201628.1185915-15-sagis@google.com> Subject: [PATCH v8 14/30] KVM: selftests: TDX: Add TDX IO writes 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-Type: text/plain; charset="UTF-8" The test verifies IO writes of various sizes from the guest to the host. Signed-off-by: Sagi Shahar --- .../selftests/kvm/include/x86/tdx/tdcall.h | 3 + tools/testing/selftests/kvm/x86/tdx_vm_test.c | 79 ++++++++++++++++++- 2 files changed, 81 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/include/x86/tdx/tdcall.h b/tools/testing/selftests/kvm/include/x86/tdx/tdcall.h index a6c966e93486..e7440f7fe259 100644 --- a/tools/testing/selftests/kvm/include/x86/tdx/tdcall.h +++ b/tools/testing/selftests/kvm/include/x86/tdx/tdcall.h @@ -7,6 +7,9 @@ #include #include +#define TDG_VP_VMCALL_SUCCESS 0x0000000000000000 +#define TDG_VP_VMCALL_INVALID_OPERAND 0x8000000000000000 + #define TDX_HCALL_HAS_OUTPUT BIT(0) #define TDX_HYPERCALL_STANDARD 0 diff --git a/tools/testing/selftests/kvm/x86/tdx_vm_test.c b/tools/testing/selftests/kvm/x86/tdx_vm_test.c index 22143d16e0d1..f646da032004 100644 --- a/tools/testing/selftests/kvm/x86/tdx_vm_test.c +++ b/tools/testing/selftests/kvm/x86/tdx_vm_test.c @@ -308,6 +308,81 @@ void verify_get_td_vmcall_info(void) printf("\t ... PASSED\n"); } +#define TDX_IO_WRITES_TEST_PORT 0x51 + +/* + * Verifies IO functionality by writing values of different sizes + * to the host. + */ +void guest_io_writes(void) +{ + uint64_t byte_4 = 0xFFABCDEF; + uint64_t byte_2 = 0xABCD; + uint64_t byte_1 = 0xAB; + uint64_t ret; + + ret = tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 1, + PORT_WRITE, &byte_1); + tdx_assert_error(ret); + + ret = tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 2, + PORT_WRITE, &byte_2); + tdx_assert_error(ret); + + ret = tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 4, + PORT_WRITE, &byte_4); + tdx_assert_error(ret); + + /* Write an invalid number of bytes. */ + ret = tdg_vp_vmcall_instruction_io(TDX_IO_WRITES_TEST_PORT, 5, + PORT_WRITE, &byte_4); + tdx_assert_error(ret); + + tdx_test_success(); +} + +void verify_guest_writes(void) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + uint32_t byte_4; + uint16_t byte_2; + uint8_t byte_1; + + vm = td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu = td_vcpu_add(vm, 0, guest_io_writes); + td_finalize(vm); + + printf("Verifying guest writes:\n"); + + tdx_run(vcpu); + tdx_test_assert_io(vcpu, TDX_IO_WRITES_TEST_PORT, 1, PORT_WRITE); + byte_1 = *(uint8_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + tdx_run(vcpu); + tdx_test_assert_io(vcpu, TDX_IO_WRITES_TEST_PORT, 2, PORT_WRITE); + byte_2 = *(uint16_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + tdx_run(vcpu); + tdx_test_assert_io(vcpu, TDX_IO_WRITES_TEST_PORT, 4, PORT_WRITE); + byte_4 = *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset); + + TEST_ASSERT_EQ(byte_1, 0xAB); + TEST_ASSERT_EQ(byte_2, 0xABCD); + TEST_ASSERT_EQ(byte_4, 0xFFABCDEF); + + td_vcpu_run(vcpu); + TEST_ASSERT_EQ(vcpu->run->exit_reason, KVM_EXIT_SYSTEM_EVENT); + TEST_ASSERT_EQ(vcpu->run->system_event.data[12], TDG_VP_VMCALL_INVALID_OPERAND); + + tdx_run(vcpu); + tdx_test_assert_success(vcpu); + + kvm_vm_free(vm); + printf("\t ... PASSED\n"); +} + int main(int argc, char **argv) { ksft_print_header(); @@ -315,7 +390,7 @@ int main(int argc, char **argv) if (!is_tdx_enabled()) ksft_exit_skip("TDX is not supported by the KVM. Exiting.\n"); - ksft_set_plan(5); + ksft_set_plan(6); 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), @@ -326,6 +401,8 @@ int main(int argc, char **argv) "verify_td_cpuid\n"); ksft_test_result(!run_in_new_process(&verify_get_td_vmcall_info), "verify_get_td_vmcall_info\n"); + ksft_test_result(!run_in_new_process(&verify_guest_writes), + "verify_guest_writes\n"); ksft_finished(); return 0; -- 2.51.0.rc0.155.g4a0f42376b-goog