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=-3.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 7DB59C2D0A8 for ; Mon, 28 Sep 2020 07:21:24 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 B297720809 for ; Mon, 28 Sep 2020 07:21:23 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B297720809 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:44976 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kMnTO-00079Y-N1 for qemu-devel@archiver.kernel.org; Mon, 28 Sep 2020 03:21:22 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:50946) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kMnSj-0006hM-MI for qemu-devel@nongnu.org; Mon, 28 Sep 2020 03:20:41 -0400 Received: from indium.canonical.com ([91.189.90.7]:48818) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kMnSh-0005Z7-Fj for qemu-devel@nongnu.org; Mon, 28 Sep 2020 03:20:41 -0400 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1kMnSf-0005NH-FX for ; Mon, 28 Sep 2020 07:20:37 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 6ED2C2E8053 for ; Mon, 28 Sep 2020 07:20:37 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 28 Sep 2020 07:15:04 -0000 From: Teodori Serge <1815721@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=New; importance=Undecided; assignee=None; X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: bmeng-cn rtos.pharos teodori-serge X-Launchpad-Bug-Reporter: RTOS Pharos (rtos.pharos) X-Launchpad-Bug-Modifier: Teodori Serge (teodori-serge) References: <155004342499.19242.14077661245921319117.malonedeb@soybean.canonical.com> Message-Id: <160127730458.12748.1569963738240456264.malone@soybean.canonical.com> Subject: [Bug 1815721] Re: RISC-V PLIC enable interrupt for multicore X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="a314d157ca9be8d00eae0214fc0d7dff1cd406e4"; Instance="production" X-Launchpad-Hash: fae988fa7bd3a7447f461a5e158b3cdcc7b8fe45 Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/09/28 03:20:37 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -67 X-Spam_score: -6.8 X-Spam_bar: ------ X-Spam_report: (-6.8 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.078, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1815721 <1815721@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Hello as far as I can tell, there is a major problem with PLIC implementation. When decompiling DTB on virt board with X harts, I see that hartid 0 has MEI and SEI, hartid 1 has MEI and SEI, etc... But when configuring context 1 (hartid 0 SEI) no interrupt is generated, but context 0, 2, 4 etc... work. So for me the problem is within PLIC or RISC-V implementation... If anyone wants to correct it, I can help. Best regards. Serge Teodori -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1815721 Title: RISC-V PLIC enable interrupt for multicore Status in QEMU: New Bug description: Hello all, There is a bug in Qemu related to the enabling of external interrupts for multicores (Virt machine). After correcting Qemu as described in #1815078 (https://bugs.launchpad.net/qemu/+bug/1815078), when we try to enable interrupts for core 1 at address 0x0C00_2080 we don't seem to be able to trigger an external interrupt (e.g. UART0). This works perfectly for core 0, but fore core 1 it does not work at all. I assume that given bug #1815078 does not enable any external interrupt then this feature has not been tested. I tried to look at the qemu source code but with no luck so far. I guess the problem is related to function parse_hart_config (in sfive_plic.c) that initializes incorrectly the plic->addr_config[addrid].hartid, which is later on read in sifive_plic_update. But this is a guess. Best regards, Pharos team To manage notifications about this bug go to: https://bugs.launchpad.net/qemu/+bug/1815721/+subscriptions