From nobody Sun Dec 28 06:38:31 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 14AADC4167B for ; Tue, 12 Dec 2023 20:48:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1377376AbjLLUsE (ORCPT ); Tue, 12 Dec 2023 15:48:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60006 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235132AbjLLUr3 (ORCPT ); Tue, 12 Dec 2023 15:47:29 -0500 Received: from mail-pj1-x1049.google.com (mail-pj1-x1049.google.com [IPv6:2607:f8b0:4864:20::1049]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 084EC10F for ; Tue, 12 Dec 2023 12:47:24 -0800 (PST) Received: by mail-pj1-x1049.google.com with SMTP id 98e67ed59e1d1-2869cdac540so3534401a91.0 for ; Tue, 12 Dec 2023 12:47:24 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1702414044; x=1703018844; 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=pOWQKACugG9g7cz1/AmBUQwWqXmyF/X6aVaYz3Y0fys=; b=xEsg+OcraIn1wXFiLbdcLlsvoQ7XrcnNSRujN/AX1yG2NSZwu0+sr2Ac3X6shM3EAg bl+rVA1HYCsXgLW2NxMMZ55Zo44UY/WcF7kMR9cGIL7NDf7/4dwfR1+ZH/m7WrVPyUaS voknZB+KcKzc21caD9XiY6nTY/iZFNWp/mySUHkSPZpvYOP4tPCPTyA4fY4XELLwjj4g /tC6TdM05yTeNd/Jujgq0g/v9lmbpd+/l8yHmyJxLcUY9TZ4JZo0OzbU7EmQM0iky9jh uSzsyYQxbQVazo21s5rstc1zQQcijjLX9HlP2kz5FRpkZa2iCzqT8N84TmjYCNJn5SGV qGCQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702414044; x=1703018844; 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=pOWQKACugG9g7cz1/AmBUQwWqXmyF/X6aVaYz3Y0fys=; b=v3iU8RrYz1Ktk5EoazB3hbdpcKKXSlzQAmhNajGWNuAq96wM7GAHcVzlKesWKXDJqV /fLS+jaUvsggnAESa8/skzaiTHt+l4QZNDsHhuHO9EXmkKgIGtQV2BcuNbIcvw1vd+3O iMkCIWHV6rL/Lq/bacPXDPR7tzivQo8Rz9DZ27C0mwNgSKAxvVlNK1WNaOxL4FC9no/F Uxhb7tn2Y82kfYZ1L8KPDLEfJM5CgSZlSR3WrBRr/BnJrDBWBFHJmgsIMlj979xvk8zS nDBLHfpeQXcaOsQASXvFenRETGZUD6zfnQIBvJTS6mlqVCTtswaRvprW92m36BySjnbW iN7A== X-Gm-Message-State: AOJu0Yw28WvVJ2TH7yKHOywpi2f9hkVrcYzIBl2zT8OaQvkJjyPYRkT3 CDYsnTkU62B+PPEzmzaX45fmKrlb8Q== X-Google-Smtp-Source: AGHT+IGLlrmxTENwZC6SGbM6jr4r7WDmCiJAWrdAa/8w6lr8saM6Dsnuvy2FguUg9MN6N/MAkqVuDY/IjA== X-Received: from sagi.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:241b]) (user=sagis job=sendgmr) by 2002:a17:903:32cb:b0:1d0:c3e7:d4c with SMTP id i11-20020a17090332cb00b001d0c3e70d4cmr53041plr.2.1702414044401; Tue, 12 Dec 2023 12:47:24 -0800 (PST) Date: Tue, 12 Dec 2023 12:46:29 -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: <20231212204647.2170650-15-sagis@google.com> Subject: [RFC PATCH v5 14/29] KVM: selftests: TDX: Add TDX IO reads 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 verifies IO reads of various sizes from the host to the guest. Signed-off-by: Sagi Shahar Signed-off-by: Ackerley Tng Signed-off-by: Ryan Afranji Reviewed-by: Binbin Wu --- .../selftests/kvm/x86_64/tdx_vm_tests.c | 87 +++++++++++++++++++ 1 file changed, 87 insertions(+) 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 a2b3e1aef151..699cba36e9ce 100644 --- a/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c +++ b/tools/testing/selftests/kvm/x86_64/tdx_vm_tests.c @@ -429,6 +429,92 @@ void verify_guest_writes(void) printf("\t ... PASSED\n"); } =20 +#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 =3D tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 1, + TDG_VP_VMCALL_INSTRUCTION_IO_READ, + &data); + if (ret) + tdx_test_fatal(ret); + if (data !=3D 0xAB) + tdx_test_fatal(1); + + ret =3D tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 2, + TDG_VP_VMCALL_INSTRUCTION_IO_READ, + &data); + if (ret) + tdx_test_fatal(ret); + if (data !=3D 0xABCD) + tdx_test_fatal(2); + + ret =3D tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_READ, + &data); + if (ret) + tdx_test_fatal(ret); + if (data !=3D 0xFFABCDEF) + tdx_test_fatal(4); + + // Read an invalid number of bytes. + ret =3D tdg_vp_vmcall_instruction_io(TDX_IO_READS_TEST_PORT, 5, + TDG_VP_VMCALL_INSTRUCTION_IO_READ, + &data); + if (ret) + tdx_test_fatal(ret); + + tdx_test_success(); +} + +void verify_guest_reads(void) +{ + struct kvm_vm *vm; + struct kvm_vcpu *vcpu; + + vm =3D td_create(); + td_initialize(vm, VM_MEM_SRC_ANONYMOUS, 0); + vcpu =3D td_vcpu_add(vm, 0, guest_io_reads); + td_finalize(vm); + + printf("Verifying guest reads:\n"); + + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IO_READS_TEST_PORT, 1, + TDG_VP_VMCALL_INSTRUCTION_IO_READ); + *(uint8_t *)((void *)vcpu->run + vcpu->run->io.data_offset) =3D 0xAB; + + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IO_READS_TEST_PORT, 2, + TDG_VP_VMCALL_INSTRUCTION_IO_READ); + *(uint16_t *)((void *)vcpu->run + vcpu->run->io.data_offset) =3D 0xABCD; + + td_vcpu_run(vcpu); + TDX_TEST_CHECK_GUEST_FAILURE(vcpu); + TDX_TEST_ASSERT_IO(vcpu, TDX_IO_READS_TEST_PORT, 4, + TDG_VP_VMCALL_INSTRUCTION_IO_READ); + *(uint32_t *)((void *)vcpu->run + vcpu->run->io.data_offset) =3D 0xFFABCD= EF; + + td_vcpu_run(vcpu); + TEST_ASSERT_EQ(vcpu->run->exit_reason, KVM_EXIT_SYSTEM_EVENT); + TEST_ASSERT_EQ(vcpu->run->system_event.data[1], TDG_VP_VMCALL_INVALID_OPE= RAND); + + td_vcpu_run(vcpu); + TDX_TEST_ASSERT_SUCCESS(vcpu); + + kvm_vm_free(vm); + printf("\t ... PASSED\n"); +} + int main(int argc, char **argv) { setbuf(stdout, NULL); @@ -444,6 +530,7 @@ int main(int argc, char **argv) run_in_new_process(&verify_td_cpuid); run_in_new_process(&verify_get_td_vmcall_info); run_in_new_process(&verify_guest_writes); + run_in_new_process(&verify_guest_reads); =20 return 0; } --=20 2.43.0.472.g3155946c3a-goog