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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 D24A1C433DF for ; Fri, 19 Jun 2020 16:29:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id AF2B021852 for ; Fri, 19 Jun 2020 16:29:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592584199; bh=xE1FbHT2U1jiB8tncTe6OdJ5hY7F51zVSxoS6ThAvyA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=y+Ya87pH4L3TkSi//JwXS75EXYcpLHk4OejeWPj6BIYiEpNcbC4gjmUohP64XzW2u h7lcpzQE8oeI2zKg7SjoJORCEy3dKR/d8c3N/m8W8/fZLT57Kesx18LLe86RewKzn9 2nfsMFObQdKeZvlWBsQM6v08JBTqHc6+D9Zaqlf4= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2393860AbgFSQ36 (ORCPT ); Fri, 19 Jun 2020 12:29:58 -0400 Received: from mail.kernel.org ([198.145.29.99]:48852 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388842AbgFSOyN (ORCPT ); Fri, 19 Jun 2020 10:54:13 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4450521852; Fri, 19 Jun 2020 14:54:13 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592578453; bh=xE1FbHT2U1jiB8tncTe6OdJ5hY7F51zVSxoS6ThAvyA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BBfgQ+ffdzt21f0t/U5DwhFSgsXfhRdEMXg1z66cXy/NZWUazf3RnHZcXALnwekp2 a8rfahZBxfJjKjDiyKXcm5MYF/558mtTfK0bCscJ8h7hrqZBaQwTVh6Dhdim4+M7Oy uVtj4rDR/b+22Z4X6sC/f/1HnrplLiGU/CzxQ5p0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= , Michael Ellerman , Sasha Levin Subject: [PATCH 4.19 020/267] powerpc/xive: Clear the page tables for the ESB IO mapping Date: Fri, 19 Jun 2020 16:30:05 +0200 Message-Id: <20200619141649.848315690@linuxfoundation.org> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20200619141648.840376470@linuxfoundation.org> References: <20200619141648.840376470@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Cédric Le Goater [ Upstream commit a101950fcb78b0ba20cd487be6627dea58d55c2b ] Commit 1ca3dec2b2df ("powerpc/xive: Prevent page fault issues in the machine crash handler") fixed an issue in the FW assisted dump of machines using hash MMU and the XIVE interrupt mode under the POWER hypervisor. It forced the mapping of the ESB page of interrupts being mapped in the Linux IRQ number space to make sure the 'crash kexec' sequence worked during such an event. But it didn't handle the un-mapping. This mapping is now blocking the removal of a passthrough IO adapter under the POWER hypervisor because it expects the guest OS to have cleared all page table entries related to the adapter. If some are still present, the RTAS call which isolates the PCI slot returns error 9001 "valid outstanding translations". Remove these mapping in the IRQ data cleanup routine. Under KVM, this cleanup is not required because the ESB pages for the adapter interrupts are un-mapped from the guest by the hypervisor in the KVM XIVE native device. This is now redundant but it's harmless. Fixes: 1ca3dec2b2df ("powerpc/xive: Prevent page fault issues in the machine crash handler") Cc: stable@vger.kernel.org # v5.5+ Signed-off-by: Cédric Le Goater Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200429075122.1216388-2-clg@kaod.org Signed-off-by: Sasha Levin --- arch/powerpc/sysdev/xive/common.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/arch/powerpc/sysdev/xive/common.c b/arch/powerpc/sysdev/xive/common.c index 1c31a08cdd54..2aa9f3de223c 100644 --- a/arch/powerpc/sysdev/xive/common.c +++ b/arch/powerpc/sysdev/xive/common.c @@ -23,6 +23,7 @@ #include #include #include +#include #include #include @@ -933,12 +934,16 @@ EXPORT_SYMBOL_GPL(is_xive_irq); void xive_cleanup_irq_data(struct xive_irq_data *xd) { if (xd->eoi_mmio) { + unmap_kernel_range((unsigned long)xd->eoi_mmio, + 1u << xd->esb_shift); iounmap(xd->eoi_mmio); if (xd->eoi_mmio == xd->trig_mmio) xd->trig_mmio = NULL; xd->eoi_mmio = NULL; } if (xd->trig_mmio) { + unmap_kernel_range((unsigned long)xd->trig_mmio, + 1u << xd->esb_shift); iounmap(xd->trig_mmio); xd->trig_mmio = NULL; } -- 2.25.1