From mboxrd@z Thu Jan 1 00:00:00 1970 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 2ECF3C4332F for ; Fri, 11 Nov 2022 14:08:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234534AbiKKOIz (ORCPT ); Fri, 11 Nov 2022 09:08:55 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50490 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234778AbiKKOHg (ORCPT ); Fri, 11 Nov 2022 09:07:36 -0500 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id EE39D99327; Fri, 11 Nov 2022 06:00:13 -0800 (PST) Message-ID: <20221111135206.800062166@linutronix.de> DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1668175134; 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: references:references; bh=7fmcFX1MJSQKPJVgurNTrf9/R1xe0is9IBLZWgzTjmw=; b=ikIR/AeSqt/XXTdAQyxTKZcUYLrhRTDWT2sptBXUbsU0SzCRHX1C80+o2BLWhFBYhOm6el ksLpaWyI+ic4nSWkQ3bzdPCEff5m6KfGLAwxizrjtcv+/L8uWlvDHMIIG6PMqTo9l2qTYb gcbbDZlgmgDxl+7PQfDsJOba6pGWPgEQZlQcjbuirbVK5hNYk7fAONSznugmW67WEJQs7B PHSlHia0l9TezyW6KhbjBEY2QR/YYdYhIn3O2XEDmg7qmqr47dAS+c54zpw0vNWm3isz2l lM5ZjjAy1H1znHrZkDRJ7oosVpKANVVmE511Di/dv5AYsuc9cOhuduXTAV/6Aw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1668175134; 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: references:references; bh=7fmcFX1MJSQKPJVgurNTrf9/R1xe0is9IBLZWgzTjmw=; b=L5+0eNKf2C8h0mEfMzHIbkytQe8CGoXz6dnzRcdcGTEYL+V0gr2N8zFZZ5ghERyB1s8prE rdS4ZWKv9fvaR5BQ== From: Thomas Gleixner To: LKML Cc: x86@kernel.org, Joerg Roedel , Will Deacon , linux-pci@vger.kernel.org, Bjorn Helgaas , Lorenzo Pieralisi , Marc Zyngier , Greg Kroah-Hartman , Jason Gunthorpe , Dave Jiang , Alex Williamson , Kevin Tian , Dan Williams , Logan Gunthorpe , Ashok Raj , Jon Mason , Allen Hubbe , "Ahmed S. Darwish" , Reinette Chatre Subject: [patch 27/33] genirq/msi: Provide constants for PCI/IMS support References: <20221111133158.196269823@linutronix.de> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Date: Fri, 11 Nov 2022 14:58:54 +0100 (CET) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Provide the necessary constants for PCI/IMS support: - A new bus token for MSI irqdomain identification - A MSI feature flag for the MSI irqdomains to signal support - A secondary domain id The latter expands the device internal domain pointer storage array from 1 to 2 entries. That extra pointer is mostly unused today, but the alternative solutions would not be free either and would introduce more complexity all over the place. Trade the 8bytes for simplicity. Signed-off-by: Thomas Gleixner --- include/linux/irqdomain_defs.h | 1 + include/linux/msi.h | 2 ++ include/linux/msi_api.h | 1 + 3 files changed, 4 insertions(+) --- a/include/linux/irqdomain_defs.h +++ b/include/linux/irqdomain_defs.h @@ -25,6 +25,7 @@ enum irq_domain_bus_token { DOMAIN_BUS_PCI_DEVICE_MSIX, DOMAIN_BUS_DMAR, DOMAIN_BUS_AMDVI, + DOMAIN_BUS_PCI_DEVICE_IMS, }; #endif /* _LINUX_IRQDOMAIN_DEFS_H */ --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -525,6 +525,8 @@ enum { MSI_FLAG_MSIX_CONTIGUOUS = (1 << 19), /* PCI/MSI-X vectors can be dynamically allocated/freed post MSI-X enable */ MSI_FLAG_PCI_MSIX_ALLOC_DYN = (1 << 20), + /* Support for PCI/IMS */ + MSI_FLAG_PCI_IMS = (1 << 21), }; /** --- a/include/linux/msi_api.h +++ b/include/linux/msi_api.h @@ -15,6 +15,7 @@ struct device; */ enum msi_domain_ids { MSI_DEFAULT_DOMAIN, + MSI_SECONDARY_DOMAIN, MSI_MAX_DEVICE_IRQDOMAINS, };