From patchwork Mon Jun 13 17:04:20 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vasant Karasulli X-Patchwork-Id: 12879965 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 94E53CCA489 for ; Mon, 13 Jun 2022 19:10:49 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348388AbiFMTKs (ORCPT ); Mon, 13 Jun 2022 15:10:48 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55774 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347719AbiFMTIG (ORCPT ); Mon, 13 Jun 2022 15:08:06 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 362303700E; Mon, 13 Jun 2022 10:04:35 -0700 (PDT) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id E371821BD6; Mon, 13 Jun 2022 17:04:33 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1655139873; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7OtOWClBlY6896CUL2CJUoXz5Le8Wk1ooKrdR/9iq2M=; b=xp0mmWyEfPaQm+HgDu9ihr5D73ZTYPe7veggysbfEXnAI4CVVUVIEpa1f0FyNiFf2lYknH g1KdLbOxKBEkWIixu7mecIMyTD4oM/KDOwd+1A6knCkskwZmPItQlXudcI7ewSGsysMtqI /Kp+RhmamogNS2jELlF7u+F8cLiQN9g= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1655139873; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=7OtOWClBlY6896CUL2CJUoXz5Le8Wk1ooKrdR/9iq2M=; b=jM7YYjvLtx6DNW15GGyf0dqs+QE8ufAtcH3oKUItx8uYtMOiFYhJ7OHtlPwP/K7AS862hF 2iooN3q0V9F0fpCw== Received: from vasant-suse.fritz.box (unknown [10.163.24.178]) by relay2.suse.de (Postfix) with ESMTP id AC69E2C141; Mon, 13 Jun 2022 17:04:33 +0000 (UTC) From: Vasant Karasulli To: linux-kernel@vger.kernel.org, kvm@vger.kernel.org Cc: bp@alien8.de, jroedel@suse.de, thomas.lendacky@amd.com, x86@kernel.org, seanjc@google.com, Vasant Karasulli Subject: [PATCH v7 4/4] KVM SEV-ES: Add tests to validate VC handling for IO instructions Date: Mon, 13 Jun 2022 19:04:20 +0200 Message-Id: <20220613170420.18521-5-vkarasulli@suse.de> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220613170420.18521-1-vkarasulli@suse.de> References: <20220613170420.18521-1-vkarasulli@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org These tests: 1. install a kretprobe on the #VC handler (sev_es_ghcb_hv_call, to access GHCB before/after the resulting VMGEXIT). 2. trigger an NAE by issuing an IO instruction. 3. check that the kretprobe was hit with the right exit_code available in GHCB. To run these tests, configuration options CONFIG_X86_TESTS and CONFIG_AMD_SEV_ES_TEST_VC have to be enabled. These tests run at the kernel boot time. Result of the test execution can be monitored in the kernel log. Signed-off-by: Vasant Karasulli --- arch/x86/tests/sev-test-vc.c | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) -- 2.32.0 diff --git a/arch/x86/tests/sev-test-vc.c b/arch/x86/tests/sev-test-vc.c index 629aa0ca1c86..33ca761bf9cb 100644 --- a/arch/x86/tests/sev-test-vc.c +++ b/arch/x86/tests/sev-test-vc.c @@ -8,7 +8,9 @@ #include #include #include +#include #include +#include #include #include @@ -101,11 +103,36 @@ static void sev_es_nae_dr7_rw(struct kunit *test) native_set_debugreg(7, native_get_debugreg(7))); } +static void sev_es_nae_ioio(struct kunit *test) +{ + unsigned long port = 0x80; + char val = 0; + + check_op(test, SVM_EXIT_IOIO, val = inb(port)); + check_op(test, SVM_EXIT_IOIO, outb(val, port)); + check_op(test, SVM_EXIT_IOIO, insb(port, &val, sizeof(val))); + check_op(test, SVM_EXIT_IOIO, outsb(port, &val, sizeof(val))); +} + +static void sev_es_nae_mmio(struct kunit *test) +{ + unsigned long lapic_ver_pa = APIC_DEFAULT_PHYS_BASE + APIC_LVR; + unsigned long __iomem *lapic = ioremap(lapic_ver_pa, 0x4); + unsigned long lapic_version = 0; + + check_op(test, SVM_VMGEXIT_MMIO_READ, lapic_version = *lapic); + check_op(test, SVM_VMGEXIT_MMIO_WRITE, *lapic = lapic_version); + + iounmap(lapic); +} + static struct kunit_case sev_es_vc_testcases[] = { KUNIT_CASE(sev_es_nae_cpuid), KUNIT_CASE(sev_es_nae_wbinvd), KUNIT_CASE(sev_es_nae_msr), KUNIT_CASE(sev_es_nae_dr7_rw), + KUNIT_CASE(sev_es_nae_ioio), + KUNIT_CASE(sev_es_nae_mmio), {} };