From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 680873612D4 for ; Thu, 20 Nov 2025 21:47:36 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763675258; cv=none; b=WeJOdot+X96EAjiZvqdCePWX97PlwnuTHxGDCvI1CCZnZbDhrestuNkWTWuHH9dbgPAKQnATEbAe3HytIeZN7lBKntrMrz68OEJz5z7xJZJXHGVIbEQ9djfjrM+V+jH91X8mfEDMsDWLEaJEvgsL4pGvhBb03v62QhnYSjorggI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763675258; c=relaxed/simple; bh=UE6KjQB5yovGXfo60jj9CDJp0VaTXC/uEGyC0+ZQ6WI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=mo13999l953qSHlq3IP3VwGpv8ruKKFHxoC+JWynI2ZXz0aTgBrVyevAdOJnM41XJ2gia/wiLtARLrxa2/EKmyO7d1OZ7kJ4ZqI9DvGc/LgPyCkytHOYXM5QLJ0rrLlDgqVD46yIy8fMkMMLRbifVOms4U1b8jmLTNVoeewy1P4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=LsZ+fAbu; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="LsZ+fAbu" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1763675255; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=aN1OpWNh0PEFSLpAjiE/XujiS2019JHFTnb3wqTZL3g=; b=LsZ+fAbuYAsUVHVtuqULBIstGF6zv1cnB9s7zm5xbhPAf2uJ4YbHbGbEQZnGd//Dc3oyHU EN4yKMod58iuOQMRXSaUx9Lt9qQjX4Tz+94LsZfa3XKysctPrHG2GMM9i6GElr9ADL6QUh sDBNr3NbriTisYFRe62wBqLzqdXJlIk= Received: from mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-517-5aSI3ripMG6K0u5B1CSodA-1; Thu, 20 Nov 2025 16:47:32 -0500 X-MC-Unique: 5aSI3ripMG6K0u5B1CSodA-1 X-Mimecast-MFC-AGG-ID: 5aSI3ripMG6K0u5B1CSodA_1763675249 Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id A4A76180048E; Thu, 20 Nov 2025 21:47:29 +0000 (UTC) Received: from chopper.redhat.com (unknown [10.22.88.52]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id E59871940E8F; Thu, 20 Nov 2025 21:47:24 +0000 (UTC) From: Lyude Paul To: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Gleixner Cc: Boqun Feng , Daniel Almeida , Miguel Ojeda , Alex Gaynor , Gary Guo , =?UTF-8?q?Bj=C3=B6rn=20Roy=20Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross , Danilo Krummrich , Andrew Morton , Peter Zijlstra , Ingo Molnar , Will Deacon , Waiman Long Subject: [PATCH v14 05/16] irq: Add KUnit test for refcounted interrupt enable/disable Date: Thu, 20 Nov 2025 16:45:57 -0500 Message-ID: <20251120214616.14386-6-lyude@redhat.com> In-Reply-To: <20251120214616.14386-1-lyude@redhat.com> References: <20251120214616.14386-1-lyude@redhat.com> Precedence: bulk X-Mailing-List: rust-for-linux@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 While making changes to the refcounted interrupt patch series, at some point on my local branch I broke something and ended up writing some kunit tests for testing refcounted interrupts as a result. So, let's include these tests now that we have refcounted interrupts. Signed-off-by: Lyude Paul --- V13: * Add missing MODULE_DESCRIPTION/MODULE_LICENSE lines * Switch from kunit_test_suites(…) to kunit_test_suite(…) kernel/irq/Makefile | 1 + kernel/irq/refcount_interrupt_test.c | 109 +++++++++++++++++++++++++++ 2 files changed, 110 insertions(+) create mode 100644 kernel/irq/refcount_interrupt_test.c diff --git a/kernel/irq/Makefile b/kernel/irq/Makefile index 6ab3a40556670..7b5bb5510b110 100644 --- a/kernel/irq/Makefile +++ b/kernel/irq/Makefile @@ -20,3 +20,4 @@ obj-$(CONFIG_SMP) += affinity.o obj-$(CONFIG_GENERIC_IRQ_DEBUGFS) += debugfs.o obj-$(CONFIG_GENERIC_IRQ_MATRIX_ALLOCATOR) += matrix.o obj-$(CONFIG_IRQ_KUNIT_TEST) += irq_test.o +obj-$(CONFIG_KUNIT) += refcount_interrupt_test.o diff --git a/kernel/irq/refcount_interrupt_test.c b/kernel/irq/refcount_interrupt_test.c new file mode 100644 index 0000000000000..b4f224595f261 --- /dev/null +++ b/kernel/irq/refcount_interrupt_test.c @@ -0,0 +1,109 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit test for refcounted interrupt enable/disables. + */ + +#include +#include + +#define TEST_IRQ_ON() KUNIT_EXPECT_FALSE(test, irqs_disabled()) +#define TEST_IRQ_OFF() KUNIT_EXPECT_TRUE(test, irqs_disabled()) + +/* ===== Test cases ===== */ +static void test_single_irq_change(struct kunit *test) +{ + local_interrupt_disable(); + TEST_IRQ_OFF(); + local_interrupt_enable(); +} + +static void test_nested_irq_change(struct kunit *test) +{ + local_interrupt_disable(); + TEST_IRQ_OFF(); + local_interrupt_disable(); + TEST_IRQ_OFF(); + local_interrupt_disable(); + TEST_IRQ_OFF(); + + local_interrupt_enable(); + TEST_IRQ_OFF(); + local_interrupt_enable(); + TEST_IRQ_OFF(); + local_interrupt_enable(); + TEST_IRQ_ON(); +} + +static void test_multiple_irq_change(struct kunit *test) +{ + local_interrupt_disable(); + TEST_IRQ_OFF(); + local_interrupt_disable(); + TEST_IRQ_OFF(); + + local_interrupt_enable(); + TEST_IRQ_OFF(); + local_interrupt_enable(); + TEST_IRQ_ON(); + + local_interrupt_disable(); + TEST_IRQ_OFF(); + local_interrupt_enable(); + TEST_IRQ_ON(); +} + +static void test_irq_save(struct kunit *test) +{ + unsigned long flags; + + local_irq_save(flags); + TEST_IRQ_OFF(); + local_interrupt_disable(); + TEST_IRQ_OFF(); + local_interrupt_enable(); + TEST_IRQ_OFF(); + local_irq_restore(flags); + TEST_IRQ_ON(); + + local_interrupt_disable(); + TEST_IRQ_OFF(); + local_irq_save(flags); + TEST_IRQ_OFF(); + local_irq_restore(flags); + TEST_IRQ_OFF(); + local_interrupt_enable(); + TEST_IRQ_ON(); +} + +static struct kunit_case test_cases[] = { + KUNIT_CASE(test_single_irq_change), + KUNIT_CASE(test_nested_irq_change), + KUNIT_CASE(test_multiple_irq_change), + KUNIT_CASE(test_irq_save), + {}, +}; + +/* (init and exit are the same */ +static int test_init(struct kunit *test) +{ + TEST_IRQ_ON(); + + return 0; +} + +static void test_exit(struct kunit *test) +{ + TEST_IRQ_ON(); +} + +static struct kunit_suite refcount_interrupt_test_suite = { + .name = "refcount_interrupt", + .test_cases = test_cases, + .init = test_init, + .exit = test_exit, +}; + +kunit_test_suite(refcount_interrupt_test_suite); +MODULE_AUTHOR("Lyude Paul "); +MODULE_DESCRIPTION("Refcounted interrupt unit test suite"); +MODULE_LICENSE("GPL"); -- 2.51.1