From patchwork Fri Mar 18 10:46:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vasant Karasulli X-Patchwork-Id: 12785168 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 46B0BC433EF for ; Fri, 18 Mar 2022 10:48:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235338AbiCRKtW (ORCPT ); Fri, 18 Mar 2022 06:49:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46910 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235474AbiCRKsJ (ORCPT ); Fri, 18 Mar 2022 06:48:09 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EDDF22C578B; Fri, 18 Mar 2022 03:46:51 -0700 (PDT) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out2.suse.de (Postfix) with ESMTP id 857121F390; Fri, 18 Mar 2022 10:46:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1647600410; 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=yiXOPvkp8VR9vIy/4EGvKMzLNQNlSpkWfG8vLlPrxcI=; b=NqHEpkmZiI4BlagA2vqZUR2q+FhmA3x5WzQBWJMWALNPtjW2CdLtVldVyXNy++5CFJqA0f 1k8qzeGEu/jWrTixXBfKSsarPAvl8kX3dOnyMBi5ePyXFzspmN1xuhfQ3gKq7S7unqYsC2 6jTUzkkCvUDE6NpbL4zeBvwnGxcyvcc= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1647600410; 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=yiXOPvkp8VR9vIy/4EGvKMzLNQNlSpkWfG8vLlPrxcI=; b=SoMUvQXsytd/+YPxpqes/k46jUQIH/ujkxBjScmGBBefcSe8Z9rNiTj1b2WSgb4QhQgyOr eg67SgX9gI8hgrBg== Received: from vasant-suse.suse.de (unknown [10.163.24.178]) by relay2.suse.de (Postfix) with ESMTP id 46AB0A3B81; Fri, 18 Mar 2022 10:46:50 +0000 (UTC) From: Vasant Karasulli To: linux-kernel@vger.kernel.org, jroedel@suse.de, kvm@vger.kernel.org Cc: bp@alien8.de, x86@kernel.org, thomas.lendacky@amd.com, varad.gautam@suse.com, Vasant Karasulli Subject: [PATCH v6 4/4] x86/tests: Add tests for AMD SEV-ES #VC handling Date: Fri, 18 Mar 2022 11:46:46 +0100 Message-Id: <20220318104646.8313-5-vkarasulli@suse.de> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20220318104646.8313-1-vkarasulli@suse.de> References: <20220318104646.8313-1-vkarasulli@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Add KUnit based tests to validate Linux's VC handling for IO instructions. 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. 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 b27b9f114a12..d0e742e2bf9f 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 @@ -111,11 +113,36 @@ 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), {} };