From patchwork Fri Jun 13 19:13:42 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sagi Shahar X-Patchwork-Id: 897193 Received: from mail-pj1-f73.google.com (mail-pj1-f73.google.com [209.85.216.73]) (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 52FDE2D5C79 for ; Fri, 13 Jun 2025 19:14:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.73 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749842077; cv=none; b=lRuq3HHkyWmBYshlgmuSwHiWxYLkzDSRcH4WhQ9Sr0B1Ikc32lWjhMV8VbNlGD9yEkICqXtK7R+U18w/nYhR+nZoJ3IzKSdmcxZGzptXvU9gj7iANT/yqJQjh1BhUCtLdkSalsFvuRt93EtzhRES8ShWpvw2uIyOJm3jpMr1qD4= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1749842077; c=relaxed/simple; bh=XiUCLbM31t3A1Ia7PvUtd8HccsiSwrLOChGJmM4U9ME=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=miPNe6BzVU9x8/9bOC3WomLySAAe/QA7zeddW+AsprgTqQVcxszNXh160Vgvr+jPyagEg3e0OFY+S1qlkWF7YRRUf/nIS7FsgTofGCpatZAOVm6hDpya5lcnRKTFyZXvhN+uWINbm1qeDPCCXVu+6G79juQjGQEwKlYJwKpmftY= 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=vICYqu6+; arc=none smtp.client-ip=209.85.216.73 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="vICYqu6+" Received: by mail-pj1-f73.google.com with SMTP id 98e67ed59e1d1-30a59538b17so2364301a91.3 for ; Fri, 13 Jun 2025 12:14:36 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1749842076; x=1750446876; 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=SP57h7voyy8pTBZCNH4MEMrCXCzzIc1ZMbh9qeY2Ibg=; b=vICYqu6+M6+2t3YdF/M1am1DaC8J2LrFFbnm+qpeyaTwU6YMwjPlTJ3Wbi8o8/4jZl yOFNDBxtpkB/4rmTJAOyK5jRrGMfp114AQavRcOpPbEZP1CgCh3WyW42Y3UhvFiA0rN1 ohLJ0ZxTPlgjxKJYKr5lwlkUeznmBPwqNrCGv9gJPjAOmPQN0U0zzF9kt1m4z7JoXyV7 bfxyqk1xs/KM9oslN4eH7/rxj/cbMXosuwIiMs/bfxEByq2Bl2BslvimYrZcWDdTCOGG cB/VQty5+ybBX5px9R+6vDPPMb9KV4OWMT9I8eUqd6mPzs1sN/ArwIUDH3LFHs9Wj7aG jP9Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1749842076; x=1750446876; 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=SP57h7voyy8pTBZCNH4MEMrCXCzzIc1ZMbh9qeY2Ibg=; b=N213o5psn6fQRRZiU21TuaWo2YOBP++s2ACx746tuscK4EhehS0ACI8v9cSuTNUV4n m1fp1Nkv4ooE3IC8JrvA2sUver3n0VDEKrmUdRfV+jO7q1CaAbQnK65J82uHAp7swfUJ RTce/9PNLTUbuIhCEFBdTbqtvLz+YQkoQ90gYoFwxG8kAQ1SAmouoH0WV/XRETkG+/AN n0b8/PtqEELpm5FNXvpcaCYc5nJfcJ40kZ9/4R4oQ+dUM7FPiJEoSdV1xdk47lh4gD55 nWukTlyvDnDnGzq/lmns+eacb9RA0u2s67Xrkipy1t6x5OvjwHFGP2uihPfg8nGJsOKL 5SiA== X-Gm-Message-State: AOJu0Yw2zK3FuCVx8LKckfDsb2PJvw6zq7u6+qdYf+0OsMUV/9XRaXhX Cu239SwRmHBZBPdbOOhLSpyW29SESPw18YkDd9Ysm5tqnobfBiXR8dsaE5O6/3Qagnm1WEHXSt7 mJzMMPfKSJgG50yp9jKyxug07z+t3rskqlFZ4MgSODbdIiR2jz07YYXg2+6gtVPdwHbZ1POd6cf HQOMv2xc51ZpwcGTrYitGJbK4Etlf3dgX1k9ZFfJLTxns= X-Google-Smtp-Source: AGHT+IELUXbtKEDjBs5GY4fdlAQg/ZPL5N4QXKAYA2nCb54Nuv3VGNUPELE6Q2Lncwpw2i1IMtNM9J4b3g== X-Received: from pjf7.prod.google.com ([2002:a17:90b:3f07:b0:311:ea2a:3919]) (user=sagis job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90a:e7c6:b0:313:2f45:2fc8 with SMTP id 98e67ed59e1d1-313f1d5872amr1337825a91.18.1749842075331; Fri, 13 Jun 2025 12:14:35 -0700 (PDT) Date: Fri, 13 Jun 2025 12:13:42 -0700 In-Reply-To: <20250613191359.35078-1-sagis@google.com> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20250613191359.35078-1-sagis@google.com> X-Mailer: git-send-email 2.50.0.rc2.692.g299adb8693-goog Message-ID: <20250613191359.35078-16-sagis@google.com> Subject: [PATCH v7 15/30] KVM: selftests: TDX: Add TDX IO reads 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 Cc: linux-kernel@vger.kernel.org, kvm@vger.kernel.org The test verifies IO reads of various sizes from the host to the guest. Signed-off-by: Sagi Shahar --- tools/testing/selftests/kvm/x86/tdx_vm_test.c | 76 ++++++++++++++++++- 1 file changed, 75 insertions(+), 1 deletion(-) diff --git a/tools/testing/selftests/kvm/x86/tdx_vm_test.c b/tools/testing/selftests/kvm/x86/tdx_vm_test.c index f646da032004..ae5749e5c605 100644 --- a/tools/testing/selftests/kvm/x86/tdx_vm_test.c +++ b/tools/testing/selftests/kvm/x86/tdx_vm_test.c @@ -383,6 +383,78 @@ void verify_guest_writes(void) printf("\t ... PASSED\n"); } +#define TDX_IO_READS_TEST_PORT 0x52 + +/* + * Verifies IO functionality by reading values of different sizes + * from the host. + */ +void guest_io_reads(void) +{ + uint64_t data; + uint64_t ret; + + ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 1, + PORT_READ, &data); + tdx_assert_error(ret); + if (data != 0xAB) + tdx_test_fatal(1); + + ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 2, + PORT_READ, &data); + tdx_assert_error(ret); + if (data != 0xABCD) + tdx_test_fatal(2); + + ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 4, + PORT_READ, &data); + tdx_assert_error(ret); + if (data != 0xFFABCDEF) + tdx_test_fatal(4); + + /* Read an invalid number of bytes. */ + ret = tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 5, + PORT_READ, &data); + tdx_assert_error(ret); + + tdx_test_success(); +} + +void verify_guest_reads(void) +{ + struct kvm_vcpu *vcpu; + struct kvm_vm *vm; + + vm = td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu = td_vcpu_add(vm, 0, guest_io_reads); + td_finalize(vm); + + printf("Verifying guest reads:\n"); + + tdx_run(vcpu); + tdx_test_assert_io(vcpu, TDX_IO_READS_TEST_PORT, 1, PORT_READ); + *(uint8_t *)((void *)vcpu->run + vcpu->run->io.data_offset) = 0xAB; + + tdx_run(vcpu); + tdx_test_assert_io(vcpu, TDX_IO_READS_TEST_PORT, 2, PORT_READ); + *(uint16_t *)((void *)vcpu->run + vcpu->run->io.data_offset) = 0xABCD; + + tdx_run(vcpu); + tdx_test_assert_io(vcpu, TDX_IO_READS_TEST_PORT, 4, PORT_READ); + *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset) = 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(); @@ -390,7 +462,7 @@ 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(6); + ksft_set_plan(7); 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), @@ -403,6 +475,8 @@ int main(int argc, char **argv) "verify_get_td_vmcall_info\n"); ksft_test_result(!run_in_new_process(&verify_guest_writes), "verify_guest_writes\n"); + ksft_test_result(!run_in_new_process(&verify_guest_reads), + "verify_guest_reads\n"); ksft_finished(); return 0;