From owner-svn-src-head@freebsd.org Mon Sep 17 17:18:55 2018 Return-Path: Delivered-To: svn-src-head@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id E836A10A2775; Mon, 17 Sep 2018 17:18:54 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 9E5C0842C9; Mon, 17 Sep 2018 17:18:54 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 94F0213FA0; Mon, 17 Sep 2018 17:18:54 +0000 (UTC) (envelope-from jhb@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id w8HHIs76095199; Mon, 17 Sep 2018 17:18:54 GMT (envelope-from jhb@FreeBSD.org) Received: (from jhb@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id w8HHIsMh095198; Mon, 17 Sep 2018 17:18:54 GMT (envelope-from jhb@FreeBSD.org) Message-Id: <201809171718.w8HHIsMh095198@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: jhb set sender to jhb@FreeBSD.org using -f From: John Baldwin Date: Mon, 17 Sep 2018 17:18:54 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r338725 - head/sys/x86/isa X-SVN-Group: head X-SVN-Commit-Author: jhb X-SVN-Commit-Paths: head/sys/x86/isa X-SVN-Commit-Revision: 338725 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.27 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 17 Sep 2018 17:18:55 -0000 Author: jhb Date: Mon Sep 17 17:18:54 2018 New Revision: 338725 URL: https://svnweb.freebsd.org/changeset/base/338725 Log: Fix a regression in r338360 when booting an x86 machine without APIC. The atpic_register_sources callback tries to avoid registering interrupt sources that would collide with an I/O APIC. However, the previous implementation was failing to register IRQs 8-15 since the slave PIC saw valid IRQs from the master and assumed an I/O APIC was present. To fix, go back to registering all 8259A interrupt sources in one loop when the master's register_sources method is invoked. PR: 231291 Approved by: re (kib) MFC after: 1 month Modified: head/sys/x86/isa/atpic.c Modified: head/sys/x86/isa/atpic.c ============================================================================== --- head/sys/x86/isa/atpic.c Mon Sep 17 16:16:57 2018 (r338724) +++ head/sys/x86/isa/atpic.c Mon Sep 17 17:18:54 2018 (r338725) @@ -221,14 +221,20 @@ atpic_register_sources(struct pic *pic) * that APIC ISA routing and allowing the ATPIC source for that IRQ * to leak through. We used to depend on this feature for routing * IRQ0 via mixed mode, but now we don't use mixed mode at all. + * + * To avoid the slave not register sources after the master + * registers its sources, register all IRQs when this function is + * called on the master. */ + if (ap != &atpics[MASTER]) + return; for (i = 0; i < NUM_ISA_IRQS; i++) if (intr_lookup_source(i) != NULL) return; /* Loop through all interrupt sources and add them. */ - for (i = 0, ai = atintrs + ap->at_irqbase; i < 8; i++, ai++) { - if (ap->at_irqbase + i == ICU_SLAVEID) + for (i = 0, ai = atintrs; i < NUM_ISA_IRQS; i++, ai++) { + if (i == ICU_SLAVEID) continue; intr_register_source(&ai->at_intsrc); }