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[2001:4830:134:3::11]) by mx.google.com with ESMTPS id r44si2956881ota.248.2016.11.10.08.15.34 for (version=TLS1 cipher=AES128-SHA bits=128/128); Thu, 10 Nov 2016 08:15:34 -0800 (PST) Received-SPF: pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) client-ip=2001:4830:134:3::11; Authentication-Results: mx.google.com; spf=pass (google.com: domain of qemu-devel-bounces+patch=linaro.org@nongnu.org designates 2001:4830:134:3::11 as permitted sender) smtp.mailfrom=qemu-devel-bounces+patch=linaro.org@nongnu.org Received: from localhost ([::1]:47450 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c4s0j-0003wF-NV for patch@linaro.org; Thu, 10 Nov 2016 11:15:33 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:60911) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1c4ru1-0006a6-Mj for qemu-devel@nongnu.org; Thu, 10 Nov 2016 11:08:39 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1c4rtz-0004jC-UB for qemu-devel@nongnu.org; Thu, 10 Nov 2016 11:08:37 -0500 Received: from mx1.redhat.com ([209.132.183.28]:34248) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1c4rtw-0004bz-7e; Thu, 10 Nov 2016 11:08:32 -0500 Received: from int-mx13.intmail.prod.int.phx2.redhat.com (int-mx13.intmail.prod.int.phx2.redhat.com [10.5.11.26]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 37CF66A6B3; Thu, 10 Nov 2016 16:08:27 +0000 (UTC) Received: from kamzik.brq.redhat.com (kamzik.brq.redhat.com [10.34.1.143]) by int-mx13.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id uAAG86ns023413; Thu, 10 Nov 2016 11:08:24 -0500 From: Andrew Jones To: kvm@vger.kernel.org, kvmarm@lists.cs.columbia.edu, qemu-devel@nongnu.org, qemu-arm@nongnu.org Date: Thu, 10 Nov 2016 17:08:00 +0100 Message-Id: <1478794084-5273-8-git-send-email-drjones@redhat.com> In-Reply-To: <1478794084-5273-1-git-send-email-drjones@redhat.com> References: <1478794084-5273-1-git-send-email-drjones@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.26 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Thu, 10 Nov 2016 16:08:27 +0000 (UTC) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [kvm-unit-tests PATCH v4 07/11] arm/arm64: gicv2: add an IPI test X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, marc.zyngier@arm.com, andre.przywara@arm.com, eric.auger@redhat.com, pbonzini@redhat.com, alex.bennee@linaro.org, christoffer.dall@linaro.org Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" Reviewed-by: Eric Auger Signed-off-by: Andrew Jones --- v4: properly mask irqnr in ipi_handler v2: add more details in the output if a test fails, report spurious interrupts if we get them --- arm/Makefile.common | 6 +- arm/gic.c | 195 ++++++++++++++++++++++++++++++++++++++++++++++++++++ arm/unittests.cfg | 7 ++ lib/arm/asm/gic.h | 6 ++ 4 files changed, 211 insertions(+), 3 deletions(-) create mode 100644 arm/gic.c -- 2.7.4 diff --git a/arm/Makefile.common b/arm/Makefile.common index 41239c37e092..bc38183ab86e 100644 --- a/arm/Makefile.common +++ b/arm/Makefile.common @@ -9,9 +9,9 @@ ifeq ($(LOADADDR),) LOADADDR = 0x40000000 endif -tests-common = \ - $(TEST_DIR)/selftest.flat \ - $(TEST_DIR)/spinlock-test.flat +tests-common = $(TEST_DIR)/selftest.flat +tests-common += $(TEST_DIR)/spinlock-test.flat +tests-common += $(TEST_DIR)/gic.flat all: test_cases diff --git a/arm/gic.c b/arm/gic.c new file mode 100644 index 000000000000..efefab7296d4 --- /dev/null +++ b/arm/gic.c @@ -0,0 +1,195 @@ +/* + * GIC tests + * + * GICv2 + * + test sending/receiving IPIs + * + * Copyright (C) 2016, Red Hat Inc, Andrew Jones + * + * This work is licensed under the terms of the GNU LGPL, version 2. + */ +#include +#include +#include +#include +#include +#include +#include + +static int gic_version; +static int acked[NR_CPUS], spurious[NR_CPUS]; +static cpumask_t ready; + +static void nr_cpu_check(int nr) +{ + if (nr_cpus < nr) + report_abort("At least %d cpus required", nr); +} + +static void wait_on_ready(void) +{ + cpumask_set_cpu(smp_processor_id(), &ready); + while (!cpumask_full(&ready)) + cpu_relax(); +} + +static void check_acked(cpumask_t *mask) +{ + int missing = 0, extra = 0, unexpected = 0; + int nr_pass, cpu, i; + + /* Wait up to 5s for all interrupts to be delivered */ + for (i = 0; i < 50; ++i) { + mdelay(100); + nr_pass = 0; + for_each_present_cpu(cpu) { + smp_rmb(); + nr_pass += cpumask_test_cpu(cpu, mask) ? + acked[cpu] == 1 : acked[cpu] == 0; + } + if (nr_pass == nr_cpus) { + report("Completed in %d ms", true, ++i * 100); + return; + } + } + + for_each_present_cpu(cpu) { + if (cpumask_test_cpu(cpu, mask)) { + if (!acked[cpu]) + ++missing; + else if (acked[cpu] > 1) + ++extra; + } else { + if (acked[cpu]) + ++unexpected; + } + } + + report("Timed-out (5s). ACKS: missing=%d extra=%d unexpected=%d", + false, missing, extra, unexpected); +} + +static void ipi_handler(struct pt_regs *regs __unused) +{ + u32 irqstat = readl(gicv2_cpu_base() + GIC_CPU_INTACK); + u32 irqnr = irqstat & GICC_IAR_INT_ID_MASK; + + if (irqnr != GICC_INT_SPURIOUS) { + writel(irqstat, gicv2_cpu_base() + GIC_CPU_EOI); + smp_rmb(); /* pairs with wmb in ipi_test functions */ + ++acked[smp_processor_id()]; + smp_wmb(); /* pairs with rmb in check_acked */ + } else { + ++spurious[smp_processor_id()]; + smp_wmb(); + } +} + +static void ipi_test_self(void) +{ + cpumask_t mask; + + report_prefix_push("self"); + memset(acked, 0, sizeof(acked)); + smp_wmb(); + cpumask_clear(&mask); + cpumask_set_cpu(0, &mask); + writel(2 << 24, gicv2_dist_base() + GIC_DIST_SOFTINT); + check_acked(&mask); + report_prefix_pop(); +} + +static void ipi_test_smp(void) +{ + cpumask_t mask; + unsigned long tlist; + + report_prefix_push("target-list"); + memset(acked, 0, sizeof(acked)); + smp_wmb(); + tlist = cpumask_bits(&cpu_present_mask)[0] & 0xaa; + cpumask_bits(&mask)[0] = tlist; + writel((u8)tlist << 16, gicv2_dist_base() + GIC_DIST_SOFTINT); + check_acked(&mask); + report_prefix_pop(); + + report_prefix_push("broadcast"); + memset(acked, 0, sizeof(acked)); + smp_wmb(); + cpumask_copy(&mask, &cpu_present_mask); + cpumask_clear_cpu(0, &mask); + writel(1 << 24, gicv2_dist_base() + GIC_DIST_SOFTINT); + check_acked(&mask); + report_prefix_pop(); +} + +static void ipi_enable(void) +{ + gicv2_enable_defaults(); +#ifdef __arm__ + install_exception_handler(EXCPTN_IRQ, ipi_handler); +#else + install_irq_handler(EL1H_IRQ, ipi_handler); +#endif + local_irq_enable(); +} + +static void ipi_recv(void) +{ + ipi_enable(); + cpumask_set_cpu(smp_processor_id(), &ready); + while (1) + wfi(); +} + +int main(int argc, char **argv) +{ + char pfx[8]; + int cpu; + + gic_version = gic_init(); + if (!gic_version) + report_abort("No gic present!"); + + snprintf(pfx, 8, "gicv%d", gic_version); + report_prefix_push(pfx); + + if (argc < 2) { + + report_prefix_push("ipi"); + ipi_enable(); + ipi_test_self(); + report_prefix_pop(); + + } else if (!strcmp(argv[1], "ipi")) { + + report_prefix_push(argv[1]); + nr_cpu_check(2); + + for_each_present_cpu(cpu) { + if (cpu == 0) + continue; + smp_boot_secondary(cpu, ipi_recv); + } + ipi_enable(); + wait_on_ready(); + ipi_test_self(); + ipi_test_smp(); + + smp_rmb(); + for_each_present_cpu(cpu) { + if (spurious[cpu]) { + printf("ipi: WARN: cpu%d got %d spurious " + "interrupts\n", + spurious[cpu], smp_processor_id()); + } + } + + report_prefix_pop(); + + } else { + report_abort("Unknown subtest '%s'", argv[1]); + } + + return report_summary(); +} diff --git a/arm/unittests.cfg b/arm/unittests.cfg index 3f6fa45c587e..68bf5cd6008f 100644 --- a/arm/unittests.cfg +++ b/arm/unittests.cfg @@ -54,3 +54,10 @@ file = selftest.flat smp = $MAX_SMP extra_params = -append 'smp' groups = selftest + +# Test GIC emulation +[gicv2-ipi] +file = gic.flat +smp = $((($MAX_SMP < 8)?$MAX_SMP:8)) +extra_params = -machine gic-version=2 -append 'ipi' +groups = gic diff --git a/lib/arm/asm/gic.h b/lib/arm/asm/gic.h index ec92f1064dc0..328e078a9ae1 100644 --- a/lib/arm/asm/gic.h +++ b/lib/arm/asm/gic.h @@ -10,14 +10,20 @@ #define GIC_CPU_CTRL 0x00 #define GIC_CPU_PRIMASK 0x04 +#define GIC_CPU_INTACK 0x0c +#define GIC_CPU_EOI 0x10 #define GICC_ENABLE 0x1 #define GICC_INT_PRI_THRESHOLD 0xf0 +#define GICC_IAR_INT_ID_MASK 0x3ff +#define GICC_INT_SPURIOUS 1023 + #define GIC_DIST_CTRL 0x000 #define GIC_DIST_CTR 0x004 #define GIC_DIST_ENABLE_SET 0x100 #define GIC_DIST_PRI 0x400 +#define GIC_DIST_SOFTINT 0xf00 #define GICD_ENABLE 0x1 #define GICD_INT_EN_SET_SGI 0x0000ffff