From mboxrd@z Thu Jan 1 00:00:00 1970 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 34198C433EF for ; Mon, 13 Jun 2022 19:11:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244477AbiFMTL0 (ORCPT ); Mon, 13 Jun 2022 15:11:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33106 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347693AbiFMTIG (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 F2C2D35262; Mon, 13 Jun 2022 10:04:34 -0700 (PDT) Received: from relay2.suse.de (relay2.suse.de [149.44.160.134]) by smtp-out1.suse.de (Postfix) with ESMTP id A5AFB21B20; 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=y7XqRusKLZHg2MAsYj31tc7FKcxL4xcYD2sDGg0rjck=; b=1uGoiuXPUKuk38YwfxQ/jX0RG/8piqm5i7lVWT4hCP6Kcj485+B2yDRsOBGEegq+hHWsF9 4UrOkwPiz6ZTfjOxVhaLrpb3ABC0etDA9HNeCHJF4cEFefQyw5p1lqjVefO5+oO3jgF52E +WoSsMQsf7FC73XBkp4HvAKDnhRVziY= 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=y7XqRusKLZHg2MAsYj31tc7FKcxL4xcYD2sDGg0rjck=; b=ETxTyfqN4F2E592ZrQLZuJb45I5sVfYoswnJy5ON37LkEklgxbDy0l4KKTSkvIkE6o6tJh S4FjFoB1G68ubnCA== Received: from vasant-suse.fritz.box (unknown [10.163.24.178]) by relay2.suse.de (Postfix) with ESMTP id 6E6D92C143; 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 3/4] KVM: SEV-ES: Add tests to validate VC handling for MSR and DR7 register accesses Date: Mon, 13 Jun 2022 19:04:19 +0200 Message-Id: <20220613170420.18521-4-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 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 accessing either MSR or DR7. 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 | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/arch/x86/tests/sev-test-vc.c b/arch/x86/tests/sev-test-vc.c index 900ca357a273..629aa0ca1c86 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 @@ -89,9 +90,22 @@ 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), {} }; -- 2.32.0