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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 333E2C2BD09 for ; Mon, 24 Jun 2024 21:44:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Type:MIME-Version: Message-ID:Date:References:In-Reply-To:Subject:Cc:To:From:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=rASr6AApb78mUlBNDuPuk8RQlBZnWLpRlrhyt32M5QA=; b=TP5DD7d9P/pPPn/qMsGQn4xx6Z 9yB7TCchMrsy68Eb8U4lZrOXjVIEpxoMezAJ+6ziMX9ONgT8r38FctNguRriAskkxhrHMvXzMvwPX Y46W24c1Kwns4REU9oUpkI3961fDZ036YyUWA1IxQ4B8U3FBlGfs/GMzzPb4Cc1lbuObvyghn4tcM jTgo4aYvZslxaPGSRDSM5ZWDlP/SdzwO0BXfxJex+f4i+twWVngc0EULIooFMemEeZjfaFNN1RHnX I16+MG2wDWh7hAP1fd8vcqotPx6A3LwXWZxNu5VT98g/a9AhXz6DSBjJICiWC5aR9fQ2M0D8NMHjM fz6PMP2Q==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1sLrU4-00000000jRU-22Yd; Mon, 24 Jun 2024 21:44:20 +0000 Received: from galois.linutronix.de ([2a0a:51c0:0:12e:550::1]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1sLrTx-00000000jPv-0YCT for linux-arm-kernel@lists.infradead.org; Mon, 24 Jun 2024 21:44:16 +0000 From: Thomas Gleixner DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1719265451; 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: in-reply-to:in-reply-to:references:references; bh=rASr6AApb78mUlBNDuPuk8RQlBZnWLpRlrhyt32M5QA=; b=3mgtx5M950PHaItAGxDU5pdxGWJ+rp6f0TyWMN7FfRzQmNso8u8W2ni5ulx1aNTlibmBjq 7CYYyo/kANI5VuBqQiFBSk0S2afc5Y5LmpRJRgSPQf1VwXaPdpCWSlQpnhQSopnZGmwSIv QSSrjlX3fB0ZPd0VacDgoNQQImRwKQG67H1laNL1Y+Rly2/ptvFN+WaSrPJsDi3iih9jqe iDPmAfRWv9UsoHZfANjcEEmmKkouP8Xy/Biq/uGRdeG6thMfqQkUxKfp69imUgde/78tJL 4zrdMPJLIxDwoXGC4+emnSt/NxBNdLBUxtTOP8nkcRhVG/ycCDc6/elB5UZQIA== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1719265451; 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: in-reply-to:in-reply-to:references:references; bh=rASr6AApb78mUlBNDuPuk8RQlBZnWLpRlrhyt32M5QA=; b=SFta+En2ITCpFuP0FHtYbBHBDm+2rgkbGl+xIEAo9nX07wqh3gTZbJ9PIWPciQ1Z0bHC9R ORl5zQ9yEBgOLrBg== To: Roman Kagan , linux-arm-kernel@lists.infradead.org Cc: Catalin Marinas , Will Deacon , nh-open-source@amazon.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, Jonathan Corbet , Marc Zyngier Subject: Re: [PATCH] irqchip/gicv3-its: Workaround for GIC-700 erratum 2195890 In-Reply-To: <20240624165541.1286227-1-rkagan@amazon.de> References: <20240624165541.1286227-1-rkagan@amazon.de> Date: Mon, 24 Jun 2024 23:44:11 +0200 Message-ID: <87pls66mok.ffs@tglx> MIME-Version: 1.0 Content-Type: text/plain X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240624_144413_510900_D67BD9ED X-CRM114-Status: GOOD ( 11.17 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Jun 24 2024 at 18:55, Roman Kagan wrote: > According to Arm CoreLink GIC-700 erratum 2195890, on GIC revisions > r0p0, r0p1, r1p0 under certain conditions LPIs may remain in the Pending > Table until one of a number of external events occurs. > > No LPIs are lost but they may not be delivered in a finite time. > > The workaround is to issue an INV using GICR_INVLPIR to an unused, in > range LPI ID to retrigger the search. > > Add this workaround to the quirk table. When the quirk is applicable, > carve out one LPI ID from the available range and run periodic work to > do INV to it, in order to prevent GIC from stalling. > > TT: https://t.corp.amazon.com/D82032616 Can you please refrain from providing internal links? > Signed-off-by: Elad Rosner > Signed-off-by: Mohamed Mediouni > Signed-off-by: Roman Kagan That Signed-off-by chain is invalid. See Documentation/process/ Thanks, tglx