From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by smtp.subspace.kernel.org (Postfix) with ESMTP id F2240258EF9; Mon, 14 Sep 2026 11:19:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=13.77.154.182 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789384771; cv=none; b=qGVAogj3oGZ1M/nI/73pehilkvOqV2t8mcir+ydsc3qlEOiaG2zF7c2TGPMvef92cm/6QhLLJkFRtT8380RWzltqFWpdKEN/PzEf+upLENaxzT7WtIZg71hn6LJ+4ebPOQHMx8Sqy7B17AQEdjvNtL+/i31nUau0gRB6m4wz+EM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789384771; c=relaxed/simple; bh=XCRjbAFuEJG34G7htxclzoGwnKvgSXl14XS5nTXx28g=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=IvDjHTjOaULixjhlDDzVHJLWTasa89imcR1HgWpXgTqoBotUOAFYu+z1YCA+qHBoGe1M//PiKOv6RUmnrQMfp4dBCcWHfSay4AySpVASs09VvE46DGBiDa3juFPg/JDsMi2ARHe+W5O8TTjdSr6k79vJVWAS2BTgwnS8jlJz15M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com; spf=pass smtp.mailfrom=linux.microsoft.com; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b=bPyBDfG4; arc=none smtp.client-ip=13.77.154.182 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.microsoft.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linux.microsoft.com header.i=@linux.microsoft.com header.b="bPyBDfG4" Received: from CPC-namja-026ON.localdomain (unknown [4.213.232.23]) by linux.microsoft.com (Postfix) with ESMTPSA id C2F7120B7168; Mon, 14 Sep 2026 04:18:37 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com C2F7120B7168 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1789384726; bh=RLUoEVqqTw8UEs5VCfXVkzx6c5gberuAxjfEayvWmUo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bPyBDfG4euqR8FSyAw8qmOfzD50NDDoHnRZYYlj9x1aOOcHJ+vdbbjvndMD+cn2DN T18DLMUW45MM2WAtvqvs+QhT6QNpLhG2DSIZ407Pe9W6yuDbaYDpF4OJo/tddNS8rd t6MMiUK/uYEPrFnhK/7+28xe9fJ10BshPhLrB0+E= From: Naman Jain To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Wei Liu , "K . Y . Srinivasan" , Haiyang Zhang , Dexuan Cui Cc: Michael Kelley , Long Li , Nam Cao , Joerg Roedel , Suravee Suthikulpanit , Vasant Hegde , Will Deacon , Robin Murphy , Lorenzo Pieralisi , =?UTF-8?q?Krzysztof=20Wilczy=C5=84ski?= , Manivannan Sadhasivam , Rob Herring , Bjorn Helgaas , Kees Cook , "Rafael J . Wysocki" , Radu Rendec , Sean Christopherson , Kai Huang , Dmitry Ilvokhin , Shradha Gupta , Christophe JAILLET , Thierry Reding , Jiri Wiesner , Daniel J Blueman , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux.dev, linux-pci@vger.kernel.org Subject: [PATCH v5 4/4] x86/irq, iommu/amd, x86/hyperv, PCI: Drop redundant irq_retrigger inits Date: Mon, 14 Sep 2026 11:18:36 +0000 Message-ID: <20260914111836.2119301-5-namjain@linux.microsoft.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20260914111836.2119301-1-namjain@linux.microsoft.com> References: <20260914111836.2119301-1-namjain@linux.microsoft.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit With fixup_irqs(), msi_set_affinity() and the generic resend path (try_retrigger()) now all falling back to irq_chip_retrigger_hierarchy(), installing it as the irq_retrigger() callback on the outermost domain chips is no longer required. The hierarchy walk reaches the x86 vector domain's apic_retrigger_irq() for all of these stacked domain chips. Remove the now redundant irq_retrigger() initializations from the outermost domain interrupt chips, including the Hyper-V root partition PCI/MSI chip. No functional change intended. Suggested-by: Thomas Gleixner Reviewed-by: Shradha Gupta Reviewed-by: Thomas Gleixner Signed-off-by: Naman Jain --- arch/x86/hyperv/irqdomain.c | 1 - arch/x86/kernel/apic/io_apic.c | 2 -- arch/x86/kernel/apic/msi.c | 2 -- arch/x86/kernel/hpet.c | 1 - drivers/iommu/amd/init.c | 1 - drivers/pci/controller/pci-hyperv.c | 1 - 6 files changed, 8 deletions(-) diff --git a/arch/x86/hyperv/irqdomain.c b/arch/x86/hyperv/irqdomain.c index 6d790636c8b95..b3ad50a874dca 100644 --- a/arch/x86/hyperv/irqdomain.c +++ b/arch/x86/hyperv/irqdomain.c @@ -316,7 +316,6 @@ static bool hv_init_dev_msi_info(struct device *dev, struct irq_domain *domain, return false; chip->flags |= IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MOVE_DEFERRED; - chip->irq_retrigger = irq_chip_retrigger_hierarchy; info->ops->msi_prepare = pci_msi_prepare; diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 7d7175d012288..18f49a251f23b 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1857,7 +1857,6 @@ static struct irq_chip ioapic_chip __read_mostly = { .irq_ack = irq_chip_ack_parent, .irq_eoi = ioapic_ack_level, .irq_set_affinity = ioapic_set_affinity, - .irq_retrigger = irq_chip_retrigger_hierarchy, .irq_get_irqchip_state = ioapic_irq_get_chip_state, .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MOVE_DEFERRED | IRQCHIP_AFFINITY_PRE_STARTUP, @@ -1871,7 +1870,6 @@ static struct irq_chip ioapic_ir_chip __read_mostly = { .irq_ack = irq_chip_ack_parent, .irq_eoi = ioapic_ir_ack_level, .irq_set_affinity = ioapic_set_affinity, - .irq_retrigger = irq_chip_retrigger_hierarchy, .irq_get_irqchip_state = ioapic_irq_get_chip_state, .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_AFFINITY_PRE_STARTUP, diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c index 9160227b9b32a..aad2f15eb2176 100644 --- a/arch/x86/kernel/apic/msi.c +++ b/arch/x86/kernel/apic/msi.c @@ -246,7 +246,6 @@ static bool x86_init_dev_msi_info(struct device *dev, struct irq_domain *domain, info->ops->msi_prepare = x86_msi_prepare; info->chip->irq_ack = irq_chip_ack_parent; - info->chip->irq_retrigger = irq_chip_retrigger_hierarchy; info->chip->flags |= IRQCHIP_SKIP_SET_WAKE | IRQCHIP_AFFINITY_PRE_STARTUP; @@ -313,7 +312,6 @@ static struct irq_chip dmar_msi_controller = { .irq_mask = dmar_msi_mask, .irq_ack = irq_chip_ack_parent, .irq_set_affinity = msi_domain_set_affinity, - .irq_retrigger = irq_chip_retrigger_hierarchy, .irq_compose_msi_msg = dmar_msi_compose_msg, .irq_write_msi_msg = dmar_msi_write_msg, .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_MOVE_DEFERRED | diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c index 8dc7b710e1250..2bb7a6f466af3 100644 --- a/arch/x86/kernel/hpet.c +++ b/arch/x86/kernel/hpet.c @@ -509,7 +509,6 @@ static struct irq_chip hpet_msi_controller __ro_after_init = { .irq_mask = hpet_msi_mask, .irq_ack = irq_chip_ack_parent, .irq_set_affinity = msi_domain_set_affinity, - .irq_retrigger = irq_chip_retrigger_hierarchy, .irq_write_msi_msg = hpet_msi_write_msg, .flags = IRQCHIP_SKIP_SET_WAKE | IRQCHIP_AFFINITY_PRE_STARTUP, }; diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index edcc187b8f14f..bc3da5b0578eb 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -2477,7 +2477,6 @@ static struct irq_chip intcapxt_controller = { .irq_unmask = intcapxt_unmask_irq, .irq_mask = intcapxt_mask_irq, .irq_ack = irq_chip_ack_parent, - .irq_retrigger = irq_chip_retrigger_hierarchy, .irq_set_affinity = intcapxt_set_affinity, .irq_set_wake = intcapxt_set_wake, .flags = IRQCHIP_MASK_ON_SUSPEND | IRQCHIP_MOVE_DEFERRED, diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c index 89816a2bd7cd3..cfc8fa403dad6 100644 --- a/drivers/pci/controller/pci-hyperv.c +++ b/drivers/pci/controller/pci-hyperv.c @@ -2119,7 +2119,6 @@ static bool hv_pcie_init_dev_msi_info(struct device *dev, struct irq_domain *dom info->ops->msi_prepare = hv_msi_prepare; chip->irq_set_affinity = irq_chip_set_affinity_parent; - chip->irq_retrigger = irq_chip_retrigger_hierarchy; if (IS_ENABLED(CONFIG_X86)) chip->flags |= IRQCHIP_MOVE_DEFERRED; -- 2.43.0