From patchwork Fri Mar 18 10:46:45 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vasant Karasulli X-Patchwork-Id: 12785167 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 2BB89C433EF for ; Fri, 18 Mar 2022 10:48:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235241AbiCRKtU (ORCPT ); Fri, 18 Mar 2022 06:49:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46908 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235473AbiCRKsJ (ORCPT ); Fri, 18 Mar 2022 06:48:09 -0400 Received: from smtp-out1.suse.de (smtp-out1.suse.de [195.135.220.28]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 998432C8B78; Fri, 18 Mar 2022 03:46:51 -0700 (PDT) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id 3AF1E21106; 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=HDW6ckspDYiNhcLAML+q7aqaHELakVIP97c3x8+sbgQ=; b=bD3GFihajRpqiBoblzKTilmYKrC4TEejWxqkWKHbF11HBR5eIXdrabjiuGmPggyhV0Nd+L 9vOXLXhotko8p3LATl7oQyldOhkq4gnY3FBSIRllTCnuY6pAgJcE8oqN8+Z85vhEb1Yl7e HvUcG3RGCprynmcCLuSEkZaQWfcPL70= 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=HDW6ckspDYiNhcLAML+q7aqaHELakVIP97c3x8+sbgQ=; b=iNF91EfWP7JHo2u6EYID/1CayhJ4tYRhsbyFir4p2BLg9RxzXBIKs7THQViZS45ksSNdJT DONeTnoiMjhzXsAg== Received: from vasant-suse.suse.de (unknown [10.163.24.178]) by relay2.suse.de (Postfix) with ESMTP id D50C8A3B83; Fri, 18 Mar 2022 10:46:49 +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 3/4] x86/tests: Add tests for AMD SEV-ES #VC handling Date: Fri, 18 Mar 2022 11:46:45 +0100 Message-Id: <20220318104646.8313-4-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 instructions accessing registers such as MSR and DR7. 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 accessing either MSR or DR7. 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 | 14 ++++++++++++++ 1 file changed, 14 insertions(+) -- 2.32.0 diff --git a/arch/x86/tests/sev-test-vc.c b/arch/x86/tests/sev-test-vc.c index 9d415b9708dc..b27b9f114a12 100644 --- a/arch/x86/tests/sev-test-vc.c +++ b/arch/x86/tests/sev-test-vc.c @@ -7,6 +7,7 @@ #include #include +#include #include #include #include @@ -99,9 +100,22 @@ static void sev_es_nae_wbinvd(struct kunit *test) check_op(test, SVM_EXIT_WBINVD, wbinvd()); } +static void sev_es_nae_msr(struct kunit *test) +{ + check_op(test, SVM_EXIT_MSR, __rdmsr(MSR_IA32_TSC)); +} + +static void sev_es_nae_dr7_rw(struct kunit *test) +{ + check_op(test, SVM_EXIT_WRITE_DR7, + native_set_debugreg(7, native_get_debugreg(7))); +} + 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), {} };