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=-6.6 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS 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 7B084C2D0E8 for ; Fri, 3 Apr 2020 07:23:48 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4A352206F8 for ; Fri, 3 Apr 2020 07:23:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="ej6Q1IPR" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4A352206F8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:51294 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jKGg7-0008C6-H1 for qemu-devel@archiver.kernel.org; Fri, 03 Apr 2020 03:23:47 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:37215) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1jKGX5-00054n-GL for qemu-devel@nongnu.org; Fri, 03 Apr 2020 03:14:28 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1jKGX4-0004SK-45 for qemu-devel@nongnu.org; Fri, 03 Apr 2020 03:14:27 -0400 Received: from us-smtp-2.mimecast.com ([207.211.31.81]:28512 helo=us-smtp-delivery-1.mimecast.com) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1jKGX3-0004Qy-WF for qemu-devel@nongnu.org; Fri, 03 Apr 2020 03:14:26 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1585898063; h=from:from:reply-to:subject:subject: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=99It+CBFhqKUVxYHC9eg5j17thBCvs97W0OysR3tyFg=; b=ej6Q1IPR66zXb8mR5XBEPsZdiXkANyS5O6hF+8qLVEld79yoADICY/qQaYr1xOk+LOuEFX u9IQAauTNDtBrUfLMYIj6bL+U+agD2pUur4cfaG7vg5Uwy+10vpJfln9PiwiDl1qtTM93J rDoSHEMzsMGy/sn0xa6zq4JcrWG+gnU= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-113-AbSVQ4DHOG6P_qupZ-GpoA-1; Fri, 03 Apr 2020 03:14:22 -0400 X-MC-Unique: AbSVQ4DHOG6P_qupZ-GpoA-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 973D2477; Fri, 3 Apr 2020 07:14:20 +0000 (UTC) Received: from laptop.redhat.com (ovpn-112-58.ams2.redhat.com [10.36.112.58]) by smtp.corp.redhat.com (Postfix) with ESMTP id CA0AD5C1C6; Fri, 3 Apr 2020 07:14:17 +0000 (UTC) From: Eric Auger To: eric.auger.pro@gmail.com, eric.auger@redhat.com, maz@kernel.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, qemu-devel@nongnu.org, qemu-arm@nongnu.org Subject: [kvm-unit-tests PATCH v4 12/12] arm: pmu: Test overflow interrupts Date: Fri, 3 Apr 2020 09:13:26 +0200 Message-Id: <20200403071326.29932-13-eric.auger@redhat.com> In-Reply-To: <20200403071326.29932-1-eric.auger@redhat.com> References: <20200403071326.29932-1-eric.auger@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 207.211.31.81 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, andrew.murray@arm.com, drjones@redhat.com, alexandru.elisei@arm.com, andre.przywara@arm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Test overflows for MEM_ACCESS and SW_INCR events. Also tests overflows with 64-bit events. Signed-off-by: Eric Auger --- v3 -> v4: - all report messages are different v2 -> v3: - added prefix pop - added pmu_stats.unexpected - added pmu- prefix - remove traces in irq_handler() v1 -> v2: - inline setup_irq() code --- arm/pmu.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++ arm/unittests.cfg | 6 ++ 2 files changed, 145 insertions(+) diff --git a/arm/pmu.c b/arm/pmu.c index f8d9a18..39831c3 100644 --- a/arm/pmu.c +++ b/arm/pmu.c @@ -59,12 +59,20 @@ #define PRE_OVERFLOW 0xFFFFFFF0 #define PRE_OVERFLOW2 0xFFFFFFDC =20 +#define PMU_PPI 23 + struct pmu { unsigned int version; unsigned int nb_implemented_counters; uint32_t pmcr_ro; }; =20 +struct pmu_stats { + unsigned long bitmap; + uint32_t interrupts[32]; + bool unexpected; +}; + static struct pmu pmu; =20 #if defined(__arm__) @@ -146,6 +154,7 @@ static void test_sw_incr(void) {} static void test_chained_counters(void) {} static void test_chained_sw_incr(void) {} static void test_chain_promotion(void) {} +static void test_overflow_interrupt(void) {} =20 #elif defined(__aarch64__) #define ID_AA64DFR0_PERFMON_SHIFT 8 @@ -276,6 +285,43 @@ asm volatile( : "x9", "x10", "cc"); } =20 +static struct pmu_stats pmu_stats; + +static void irq_handler(struct pt_regs *regs) +{ + uint32_t irqstat, irqnr; + + irqstat =3D gic_read_iar(); + irqnr =3D gic_iar_irqnr(irqstat); + + if (irqnr =3D=3D PMU_PPI) { + unsigned long overflows =3D read_sysreg(pmovsclr_el0); + int i; + + for (i =3D 0; i < 32; i++) { + if (test_and_clear_bit(i, &overflows)) { + pmu_stats.interrupts[i]++; + pmu_stats.bitmap |=3D 1 << i; + } + } + write_sysreg(ALL_SET, pmovsclr_el0); + } else { + pmu_stats.unexpected =3D true; + } + gic_write_eoir(irqstat); +} + +static void pmu_reset_stats(void) +{ + int i; + + for (i =3D 0; i < 32; i++) + pmu_stats.interrupts[i] =3D 0; + + pmu_stats.bitmap =3D 0; + pmu_stats.unexpected =3D false; +} + static void pmu_reset(void) { /* reset all counters, counting disabled at PMCR level*/ @@ -286,6 +332,7 @@ static void pmu_reset(void) write_sysreg(ALL_SET, pmovsclr_el0); /* disable overflow interrupts on all counters */ write_sysreg(ALL_SET, pmintenclr_el1); + pmu_reset_stats(); isb(); } =20 @@ -729,6 +776,94 @@ static void test_chain_promotion(void) read_sysreg(pmovsclr_el0)); } =20 +static bool expect_interrupts(uint32_t bitmap) +{ + int i; + + if (pmu_stats.bitmap ^ bitmap || pmu_stats.unexpected) + return false; + + for (i =3D 0; i < 32; i++) { + if (test_and_clear_bit(i, &pmu_stats.bitmap)) + if (pmu_stats.interrupts[i] !=3D 1) + return false; + } + return true; +} + +static void test_overflow_interrupt(void) +{ + uint32_t events[] =3D {MEM_ACCESS, SW_INCR}; + void *addr =3D malloc(PAGE_SIZE); + int i; + + if (!satisfy_prerequisites(events, ARRAY_SIZE(events))) + return; + + gic_enable_defaults(); + install_irq_handler(EL1H_IRQ, irq_handler); + local_irq_enable(); + gic_enable_irq(23); + + pmu_reset(); + + write_regn_el0(pmevtyper, 0, MEM_ACCESS | PMEVTYPER_EXCLUDE_EL0); + write_regn_el0(pmevtyper, 1, SW_INCR | PMEVTYPER_EXCLUDE_EL0); + write_sysreg_s(0x3, PMCNTENSET_EL0); + write_regn_el0(pmevcntr, 0, PRE_OVERFLOW); + write_regn_el0(pmevcntr, 1, PRE_OVERFLOW); + isb(); + + /* interrupts are disabled */ + + mem_access_loop(addr, 200, pmu.pmcr_ro | PMU_PMCR_E); + report(expect_interrupts(0), "no overflow interrupt after preset"); + + set_pmcr(pmu.pmcr_ro | PMU_PMCR_E); + for (i =3D 0; i < 100; i++) + write_sysreg(0x2, pmswinc_el0); + + set_pmcr(pmu.pmcr_ro); + report(expect_interrupts(0), "no overflow interrupt after counting"); + + /* enable interrupts */ + + pmu_reset_stats(); + + write_regn_el0(pmevcntr, 0, PRE_OVERFLOW); + write_regn_el0(pmevcntr, 1, PRE_OVERFLOW); + write_sysreg(ALL_SET, pmintenset_el1); + isb(); + + mem_access_loop(addr, 200, pmu.pmcr_ro | PMU_PMCR_E); + for (i =3D 0; i < 100; i++) + write_sysreg(0x3, pmswinc_el0); + + mem_access_loop(addr, 200, pmu.pmcr_ro); + report_info("overflow=3D0x%lx", read_sysreg(pmovsclr_el0)); + report(expect_interrupts(0x3), + "overflow interrupts expected on #0 and #1"); + + /* promote to 64-b */ + + pmu_reset_stats(); + + write_regn_el0(pmevtyper, 1, CHAIN | PMEVTYPER_EXCLUDE_EL0); + write_regn_el0(pmevcntr, 0, PRE_OVERFLOW); + isb(); + mem_access_loop(addr, 200, pmu.pmcr_ro | PMU_PMCR_E); + report(expect_interrupts(0), + "no overflow interrupt expected on 32b boundary"); + + /* overflow on odd counter */ + pmu_reset_stats(); + write_regn_el0(pmevcntr, 0, PRE_OVERFLOW); + write_regn_el0(pmevcntr, 1, ALL_SET); + isb(); + mem_access_loop(addr, 400, pmu.pmcr_ro | PMU_PMCR_E); + report(expect_interrupts(0x2), + "expect overflow interrupt on odd counter"); +} #endif =20 /* @@ -931,6 +1066,10 @@ int main(int argc, char *argv[]) report_prefix_push(argv[1]); test_chain_promotion(); report_prefix_pop(); + } else if (strcmp(argv[1], "pmu-overflow-interrupt") =3D=3D 0) { + report_prefix_push(argv[1]); + test_overflow_interrupt(); + report_prefix_pop(); } else { report_abort("Unknown sub-test '%s'", argv[1]); } diff --git a/arm/unittests.cfg b/arm/unittests.cfg index 1b0c8c8..455fd10 100644 --- a/arm/unittests.cfg +++ b/arm/unittests.cfg @@ -114,6 +114,12 @@ groups =3D pmu arch =3D arm64 extra_params =3D -append 'pmu-chain-promotion' =20 +[pmu-overflow-interrupt] +file =3D pmu.flat +groups =3D pmu +arch =3D arm64 +extra_params =3D -append 'pmu-overflow-interrupt' + # Test PMU support (TCG) with -icount IPC=3D1 #[pmu-tcg-icount-1] #file =3D pmu.flat --=20 2.20.1