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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6B37AC433DF for ; Sun, 17 May 2020 10:11:34 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 54B5E206F4 for ; Sun, 17 May 2020 10:11:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727845AbgEQKL1 (ORCPT ); Sun, 17 May 2020 06:11:27 -0400 Received: from szxga05-in.huawei.com ([45.249.212.191]:4805 "EHLO huawei.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1727834AbgEQKL0 (ORCPT ); Sun, 17 May 2020 06:11:26 -0400 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id 1D3621D6387FA7EA67E2; Sun, 17 May 2020 18:11:24 +0800 (CST) Received: from DESKTOP-FPN2511.china.huawei.com (10.173.222.58) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.487.0; Sun, 17 May 2020 18:11:16 +0800 From: Jingyi Wang To: , , , CC: , , , Subject: [kvm-unit-tests PATCH 5/6] arm64: microbench: its: Add LPI latency test. Date: Sun, 17 May 2020 18:08:59 +0800 Message-ID: <20200517100900.30792-6-wangjingyi11@huawei.com> X-Mailer: git-send-email 2.14.1.windows.1 In-Reply-To: <20200517100900.30792-1-wangjingyi11@huawei.com> References: <20200517100900.30792-1-wangjingyi11@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.173.222.58] X-CFilter-Loop: Reflected Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Triggers LPIs through the INT command and test the latency. Mostly inherited form commit 0ef02cd6cbaa(arm/arm64: ITS: INT functional tests). Signed-off-by: Jingyi Wang --- arm/micro-bench.c | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/arm/micro-bench.c b/arm/micro-bench.c index 0c7869b..91af1f7 100644 --- a/arm/micro-bench.c +++ b/arm/micro-bench.c @@ -20,6 +20,7 @@ */ #include #include +#include #define NTIMES (1U << 16) @@ -152,6 +153,48 @@ static void ipi_exec(void) assert_msg(irq_received, "failed to receive IPI in time, but received %d successfully\n", received); } +static bool lpi_prep(void) +{ + struct its_collection *col1; + struct its_device *dev2; + + if (!gicv3_its_base()) + return false; + + its_enable_defaults(); + dev2 = its_create_device(2 /* dev id */, 8 /* nb_ites */); + col1 = its_create_collection(1 /* col id */, 1 /* target PE */); + gicv3_lpi_set_config(8199, LPI_PROP_DEFAULT); + + its_send_mapd_nv(dev2, true); + its_send_mapc_nv(col1, true); + its_send_invall_nv(col1); + its_send_mapti_nv(dev2, 8199 /* lpi id */, 20 /* event id */, col1); + + gic_prep_common(); + return true; +} + +static void lpi_exec(void) +{ + struct its_device *dev2; + unsigned tries = 1 << 28; + static int received = 0; + + irq_received = false; + + dev2 = its_get_device(2); + its_send_int_nv(dev2, 20); + + while (!irq_received && tries--) + cpu_relax(); + + if (irq_received) + ++received; + + assert_msg(irq_received, "failed to receive LPI in time, but received %d successfully\n", received); +} + static void hvc_exec(void) { asm volatile("mov w0, #0x4b000000; hvc #0" ::: "w0"); @@ -197,6 +240,7 @@ static struct exit_test tests[] = { {"eoi", NULL, eoi_exec, true}, {"ipi", ipi_prep, ipi_exec, true}, {"ipi_hw", ipi_hw_prep, ipi_exec, true}, + {"lpi", lpi_prep, lpi_exec, true}, }; struct ns_time { -- 2.19.1