From nobody Thu Sep 18 14:13:57 2025 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 826B8C4332F for ; Mon, 5 Dec 2022 18:26:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233139AbiLESZ7 (ORCPT ); Mon, 5 Dec 2022 13:25:59 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39326 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232384AbiLESZQ (ORCPT ); Mon, 5 Dec 2022 13:25:16 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 968D220BE9; Mon, 5 Dec 2022 10:25:15 -0800 (PST) Date: Mon, 05 Dec 2022 18:25:12 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1670264712; h=from:from:sender:sender:reply-to: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=L3cVvaZ861CdHgQ20cPT2x41VcMQTfl5UMAkIYAP83Y=; b=mjV+bARko7eQQ3XqYu0w46y7FbPDNPwtkJm7LLX210ONCoJ8vNepMPLp9YYIe7vTpZpCZA iUYPs9GWilAmpnHkEsbGk7VH2GWl5Qle34W7KKPHo/oSLA04ejRLEkk2QXOj0id/JUPmlr fUjpiV4GNatKw1DZ0cKsCfV+zBhIZfX9AWSmE5VArxT96RyiRI9Du/ni0U5CUUzuqZUZcr ZG2nIDWlIkXeY1KMlFa/cj6srGWshtiIY0AGFOTnAI0wOdXhe5s+481UH6pj7D1k4fuK7i pEUb9yKGJUPl8P0nWUyyatPCg7OOKDrSSjrEjMdGfnFo78qUIygIyPD5UA6YZg== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1670264712; h=from:from:sender:sender:reply-to: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=L3cVvaZ861CdHgQ20cPT2x41VcMQTfl5UMAkIYAP83Y=; b=6jpK2y/dp+bB1oj9392oRA0rxUZgUHwMn1jJl99SKrwUTocNFF+K3SBsdbK9XDgIFdoy7p 1fnc0kxVfP3sTJCQ== From: "tip-bot2 for Thomas Gleixner" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: irq/core] genirq/msi: Provide MSI_FLAG_MSIX_ALLOC_DYN Cc: Thomas Gleixner , Jason Gunthorpe , Kevin Tian , Marc Zyngier , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20221124232326.558843119@linutronix.de> References: <20221124232326.558843119@linutronix.de> MIME-Version: 1.0 Message-ID: <167026471245.4906.13219744134273278472.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The following commit has been merged into the irq/core branch of tip: Commit-ID: 656013915af76b199827f26e18776d897d2b7e7e Gitweb: https://git.kernel.org/tip/656013915af76b199827f26e18776d897= d2b7e7e Author: Thomas Gleixner AuthorDate: Fri, 25 Nov 2022 00:26:20 +01:00 Committer: Thomas Gleixner CommitterDate: Mon, 05 Dec 2022 19:21:03 +01:00 genirq/msi: Provide MSI_FLAG_MSIX_ALLOC_DYN Provide a new MSI feature flag in preparation for dynamic MSIX allocation after the initial MSI-X enable has been done. This needs to be an explicit MSI interrupt domain feature because quite some implementations (both interrupt domains and legacy allocation mode) have clear expectations that the allocation code is only invoked when MSI-X is about to be enabled. They either talk to hypervisors or do some other work and are not prepared to be invoked on an already MSI-X enabled device. This is also explicit MSI-X only because rewriting the size of the MSI entries is only possible when disabling MSI which in turn might cause lost interrupts on the device. Signed-off-by: Thomas Gleixner Reviewed-by: Jason Gunthorpe Reviewed-by: Kevin Tian Acked-by: Marc Zyngier Link: https://lore.kernel.org/r/20221124232326.558843119@linutronix.de --- include/linux/msi.h | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/include/linux/msi.h b/include/linux/msi.h index 00c5019..3cb1586 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -557,7 +557,8 @@ enum { MSI_FLAG_LEVEL_CAPABLE =3D (1 << 18), /* MSI-X entries must be contiguous */ MSI_FLAG_MSIX_CONTIGUOUS =3D (1 << 19), - + /* PCI/MSI-X vectors can be dynamically allocated/freed post MSI-X enable= */ + MSI_FLAG_PCI_MSIX_ALLOC_DYN =3D (1 << 20), }; =20 /**