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=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 D45DAC433E3 for ; Fri, 31 Jul 2020 07:43:54 +0000 (UTC) Received: from mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by mail.kernel.org (Postfix) with ESMTP id 93AAB20829 for ; Fri, 31 Jul 2020 07:43:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 93AAB20829 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=huawei.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=kvmarm-bounces@lists.cs.columbia.edu Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 311084B334; Fri, 31 Jul 2020 03:43:54 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id BZ6BirUFHMwW; Fri, 31 Jul 2020 03:43:53 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id C31654B4EA; Fri, 31 Jul 2020 03:43:51 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 71EB14B388 for ; Fri, 31 Jul 2020 03:43:50 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id b1gWv7bpQsEb for ; Fri, 31 Jul 2020 03:43:49 -0400 (EDT) Received: from huawei.com (szxga06-in.huawei.com [45.249.212.32]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id A21984B36E for ; Fri, 31 Jul 2020 03:43:46 -0400 (EDT) Received: from DGGEMS414-HUB.china.huawei.com (unknown [172.30.72.60]) by Forcepoint Email with ESMTP id BA0EE64F97D95F17C648; Fri, 31 Jul 2020 15:43:36 +0800 (CST) Received: from DESKTOP-FPN2511.china.huawei.com (10.174.187.42) by DGGEMS414-HUB.china.huawei.com (10.3.19.214) with Microsoft SMTP Server id 14.3.487.0; Fri, 31 Jul 2020 15:43:28 +0800 From: Jingyi Wang To: , , Subject: [kvm-unit-tests PATCH v3 08/10] arm64: microbench: Add vtimer latency test Date: Fri, 31 Jul 2020 15:42:42 +0800 Message-ID: <20200731074244.20432-9-wangjingyi11@huawei.com> X-Mailer: git-send-email 2.14.1.windows.1 In-Reply-To: <20200731074244.20432-1-wangjingyi11@huawei.com> References: <20200731074244.20432-1-wangjingyi11@huawei.com> MIME-Version: 1.0 X-Originating-IP: [10.174.187.42] X-CFilter-Loop: Reflected Cc: maz@kernel.org, prime.zeng@hisilicon.com X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Trigger PPIs by setting up a 10msec timer and test the latency. Signed-off-by: Jingyi Wang --- arm/micro-bench.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 52 insertions(+), 1 deletion(-) diff --git a/arm/micro-bench.c b/arm/micro-bench.c index 09d9d53..1e1bde5 100644 --- a/arm/micro-bench.c +++ b/arm/micro-bench.c @@ -21,8 +21,10 @@ #include #include #include +#include #define NS_5_SECONDS (5 * 1000 * 1000 * 1000UL) + static u32 cntfrq; static volatile bool irq_ready, irq_received; @@ -33,9 +35,16 @@ static void (*write_eoir)(u32 irqstat); static void gic_irq_handler(struct pt_regs *regs) { + u32 irqstat = gic_read_iar(); irq_ready = false; irq_received = true; - gic_write_eoir(gic_read_iar()); + gic_write_eoir(irqstat); + + if (irqstat == PPI(TIMER_VTIMER_IRQ)) { + write_sysreg((ARCH_TIMER_CTL_IMASK | ARCH_TIMER_CTL_ENABLE), + cntv_ctl_el0); + isb(); + } irq_ready = true; } @@ -198,6 +207,47 @@ static void lpi_exec(void) assert_msg(irq_received, "failed to receive LPI in time, but received %d successfully\n", received); } +static bool timer_prep(void) +{ + static void *gic_isenabler; + + gic_enable_defaults(); + install_irq_handler(EL1H_IRQ, gic_irq_handler); + local_irq_enable(); + + gic_isenabler = gicv3_sgi_base() + GICR_ISENABLER0; + writel(1 << PPI(TIMER_VTIMER_IRQ), gic_isenabler); + write_sysreg(ARCH_TIMER_CTL_ENABLE, cntv_ctl_el0); + isb(); + + gic_prep_common(); + return true; +} + +static void timer_exec(void) +{ + u64 before_timer; + u64 timer_10ms; + unsigned tries = 1 << 28; + static int received = 0; + + irq_received = false; + + before_timer = read_sysreg(cntvct_el0); + timer_10ms = cntfrq / 100; + write_sysreg(before_timer + timer_10ms, cntv_cval_el0); + write_sysreg(ARCH_TIMER_CTL_ENABLE, cntv_ctl_el0); + isb(); + + while (!irq_received && tries--) + cpu_relax(); + + if (irq_received) + ++received; + + assert_msg(irq_received, "failed to receive PPI in time, but received %d successfully\n", received); +} + static void hvc_exec(void) { asm volatile("mov w0, #0x4b000000; hvc #0" ::: "w0"); @@ -245,6 +295,7 @@ static struct exit_test tests[] = { {"ipi", ipi_prep, ipi_exec, 65536, true}, {"ipi_hw", ipi_hw_prep, ipi_exec, 65536, true}, {"lpi", lpi_prep, lpi_exec, 65536, true}, + {"timer_10ms", timer_prep, timer_exec, 256, true}, }; struct ns_time { -- 2.19.1 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm