From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-ed1-f73.google.com (mail-ed1-f73.google.com [209.85.208.73]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 423E5312829 for ; Sun, 16 Nov 2025 18:29:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.208.73 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763317759; cv=none; b=KACvILLnTYCDr1tPeJDvFPT0o8VXQyR0t4xIjC7Q7ao0sLHj0ENaUmEnCQY+IJO/8AVXdodGWD2FArct0z99Y4hnmuIFdTDlnZIE1zR0ZrG9MZJkkO81GiuhjP0lamQsX30I4dpYBm3g1xrbQg2+gxZJs+Ki0uvEBPZ6xfDY99U= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763317759; c=relaxed/simple; bh=1ZFyFxA+oQ+ok8wSm6aDLsEi46Nbc2ug/MQz5FqVjRI=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=mbmUvz9M1br3uoCwvp7QOJfe+4U01GE8EYXzIW4ovxhj8HKgRQIeMhhXSZRiCrfWgcMmZsEe8+N7UphFBR8Zif0mLjDftVX7ePDZD0HAysSEjmmfEnpgaKc72z1Suh8M+j/hS5iC6MXyxvKw/U8MAyHHdcfPAIjRQLSB5r52gBU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--lrizzo.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=qdC2DgbI; arc=none smtp.client-ip=209.85.208.73 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--lrizzo.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="qdC2DgbI" Received: by mail-ed1-f73.google.com with SMTP id 4fb4d7f45d1cf-640c4609713so5470631a12.2 for ; Sun, 16 Nov 2025 10:29:15 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1763317754; x=1763922554; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=ssIrRFSIZLhL847+Mj1S01mAVv1HMT3ge2VjAzv+kxg=; b=qdC2DgbImsKU3TGx+iuSyxAo/ToZBzAw6bZbJRCo9xptEHhtBvzJMc1NCDQ3CpqRMi sIeV8wwfCR0c7k5IS4myZuIbyZeNM8Shd2xgnpVz18Ua9aopCqfCZhYcgQLBMx0TnYj2 unS815JWdyL5EsNCo0Alz2DzKCHoRqBACq6PJY7GnCaKSdDE77jTsqGagg6WeVHVmoJr bLboCGFEqYuFBhhcGndKYc+sm+SEN6fLFd0EAPqNhENoKWfEGwBOERJKB3tNpnWso5RK lhIZGhV921VINHsdQuOmqrTSloyMZB0pbGQDvVvITHZlNjLhQZed98MSwwzuS0lGsGfr ehYg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1763317754; x=1763922554; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=ssIrRFSIZLhL847+Mj1S01mAVv1HMT3ge2VjAzv+kxg=; b=g8N/PnvSPEwlyhVy96nYfHi+7RWAFOPdFY4UXLpdvs9CCKgWY96SDlGiyYPGNVx8q3 EsEA0vkbtWT5EeIA7n/UvwV8VlWw1yhQYAiqbohqN20tAgHNwLF+v82h+EqWvRC19iDq JAp47rhZWbpPcl0Di9k1Lmqu2KvJWtWLvpqz4kv0V1IDO82g9e/oJjpp9o4pKTj6JoZ6 tzMMVmAIikvHuzutkY/LIiykgiss+O8Yn/WzMe2HfsWxSxDBiheEm7kdQS+hqKIHv+wP VerKBm1OHkkl6ecqf/nZBnGtb1qMl0duMQl3cgQPs49gcPU6fqfPXf05AGBATiWpuCvJ OPlQ== X-Gm-Message-State: AOJu0YxOG/9/snP5aqenMr5H7RpPyRf/l72MSv+v6fcPjGSBFt4hsCeZ qcLTe/Rdrui7iYo5xHL+GISMlpvml6n4Y1UaI8klS9elz/2O2nhI0D+LAvyZG1OopfB070UvjkW vhUTNgQ== X-Google-Smtp-Source: AGHT+IGHAbppNHiwJnClKOePjqFi/tDUwKC7ezqVNbe2nbWY/8nzQo9Lx1mTLxNflma40Wb/tllUcL0zHFY= X-Received: from edo12.prod.google.com ([2002:a05:6402:52cc:b0:641:7661:2a7c]) (user=lrizzo job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6402:35d2:b0:640:be87:a858 with SMTP id 4fb4d7f45d1cf-64350e9eb3cmr9605284a12.27.1763317754455; Sun, 16 Nov 2025 10:29:14 -0800 (PST) Date: Sun, 16 Nov 2025 18:28:39 +0000 In-Reply-To: <20251116182839.939139-1-lrizzo@google.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20251116182839.939139-1-lrizzo@google.com> X-Mailer: git-send-email 2.52.0.rc1.455.g30608eb744-goog Message-ID: <20251116182839.939139-9-lrizzo@google.com> Subject: [PATCH v2 8/8] vfio-pci: add module parameter for default moderation mode From: Luigi Rizzo To: Thomas Gleixner , Marc Zyngier , Luigi Rizzo , Paolo Abeni , Andrew Morton , Sean Christopherson , Jacob Pan Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, Bjorn Helgaas , Willem de Bruijn , Luigi Rizzo Content-Type: text/plain; charset="UTF-8" The following module parameter enables moderation at boot time for vfio devices. vfio_pci_core.soft_moderation=1 It can be overridden at runtime via /proc/irq/*/*vfio*/soft_moderation. See Documentation/core-api/irq/irq-moderation.rst for configuration. Change-Id: I69ece365fa8eb796c22e088dbe849eddb684e02a Signed-off-by: Luigi Rizzo --- drivers/vfio/pci/vfio_pci_intrs.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/vfio/pci/vfio_pci_intrs.c b/drivers/vfio/pci/vfio_pci_intrs.c index 30d3e921cb0de..e54d88cfe601d 100644 --- a/drivers/vfio/pci/vfio_pci_intrs.c +++ b/drivers/vfio/pci/vfio_pci_intrs.c @@ -22,6 +22,8 @@ #include "vfio_pci_priv.h" +DEFINE_IRQ_MODERATION_MODE_PARAMETER; + struct vfio_pci_irq_ctx { struct vfio_pci_core_device *vdev; struct eventfd_ctx *trigger; @@ -317,6 +319,7 @@ static int vfio_intx_enable(struct vfio_pci_core_device *vdev, vfio_irq_ctx_free(vdev, ctx, 0); return ret; } + IRQ_MODERATION_SET_DEFAULT_MODE(pdev->irq); return 0; } -- 2.52.0.rc1.455.g30608eb744-goog