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 X-Spam-Level: X-Spam-Status: No, score=-8.8 required=3.0 tests=DKIM_INVALID,DKIM_SIGNED, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 81966C04AB1 for ; Mon, 13 May 2019 05:41:04 +0000 (UTC) Received: from lists.ozlabs.org (unknown [203.11.71.2]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 87F0320879 for ; Mon, 13 May 2019 05:41:03 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=neuling.org header.i=@neuling.org header.b="SBZho+4s" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 87F0320879 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=neuling.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Received: from lists.ozlabs.org (lists.ozlabs.org [IPv6:2401:3900:2:1::3]) by lists.ozlabs.org (Postfix) with ESMTP id 452V6P11XzzDqHL for ; Mon, 13 May 2019 15:41:01 +1000 (AEST) Received: from ozlabs.org (bilbo.ozlabs.org [203.11.71.1]) (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 lists.ozlabs.org (Postfix) with ESMTPS id 452V4z3pNpzDqFL for ; Mon, 13 May 2019 15:39:47 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dmarc=none (p=none dis=none) header.from=neuling.org Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=neuling.org header.i=@neuling.org header.b="SBZho+4s"; dkim-atps=neutral Received: from neuling.org (localhost [127.0.0.1]) by ozlabs.org (Postfix) with ESMTP id 452V4y4qlQz9sBr; Mon, 13 May 2019 15:39:46 +1000 (AEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=neuling.org; s=201811; t=1557725986; bh=E99oQlisjXXHDz37euXve/y111mvEfemI5ngb4z4tjc=; h=From:To:Cc:Subject:Date:From; b=SBZho+4sqhTPFRWKUE4fu8yW41qQ5OHSnBtYd+cXE1wqq+Hop9Msf5lOiGp+/VeZR hPZI+G8Zvi2Kg1Z55DwA8c1SQ54c/jC0FRBPYBdx1Of5yc6W1SBA1lVxQ1mKpcV3a/ mpKUUhIfFu97I5ZBoAjJCN8oA66++/ld6qnxTuRmxB5eKzENocAYMIxv01CZs5f7o4 w5uzoMPHYYMEZUCqbqTfaiccIQA2763NSHB5wZoEMJdwIJNWNS61xOqV2ERcVJHFKg tpTiVp5iG4zyARrOhgU3YyoPHXpvLsCdgmTm9VGzy+3dHrx6iMtMr0guHlhkyCoEEX q6D3CmGJYpzQQ== Received: by neuling.org (Postfix, from userid 1000) id 9764C2A0390; Mon, 13 May 2019 15:39:46 +1000 (AEST) From: Michael Neuling To: mpe@ellerman.id.au Subject: [PATCH] powerpc: Document xive=off option Date: Mon, 13 May 2019 15:39:10 +1000 Message-Id: <20190513053910.19227-1-mikey@neuling.org> X-Mailer: git-send-email 2.21.0 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mikey@neuling.org, linuxppc-dev@lists.ozlabs.org, =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" commit 243e25112d06 ("powerpc/xive: Native exploitation of the XIVE interrupt controller") added an option to turn off Linux native XIVE usage via the xive=off kernel command line option. This documents this option. Signed-off-by: Michael Neuling --- Documentation/admin-guide/kernel-parameters.txt | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index c45a19d654..ee410d0ef4 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -5177,6 +5177,15 @@ Format: ,,,,,[,[,[,]]] + xive= [PPC] + By default on POWER9 and above, the kernel will + natively use the XIVE interrupt controller. This option + allows the fallback firmware mode to be used: + + off Fallback to firmware control of XIVE interrupt + controller on both pseries and powernv + platforms. Only useful on POWER9 and above. + xhci-hcd.quirks [USB,KNL] A hex value specifying bitmask with supplemental xhci host controller quirks. Meaning of each bit can be -- 2.21.0