From owner-svn-src-all@freebsd.org Fri Mar 15 01:42:46 2019 Return-Path: Delivered-To: svn-src-all@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 123E71536F7C; Fri, 15 Mar 2019 01:42:46 +0000 (UTC) (envelope-from freebsd@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (br1.CN84in.dnsmgr.net [69.59.192.140]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 78DE677EFA; Fri, 15 Mar 2019 01:42:45 +0000 (UTC) (envelope-from freebsd@gndrsh.dnsmgr.net) Received: from gndrsh.dnsmgr.net (localhost [127.0.0.1]) by gndrsh.dnsmgr.net (8.13.3/8.13.3) with ESMTP id x2F1gh9J027746; Thu, 14 Mar 2019 18:42:43 -0700 (PDT) (envelope-from freebsd@gndrsh.dnsmgr.net) Received: (from freebsd@localhost) by gndrsh.dnsmgr.net (8.13.3/8.13.3/Submit) id x2F1ghMa027745; Thu, 14 Mar 2019 18:42:43 -0700 (PDT) (envelope-from freebsd) From: "Rodney W. Grimes" Message-Id: <201903150142.x2F1ghMa027745@gndrsh.dnsmgr.net> Subject: Re: svn commit: r345158 - head/usr.sbin/bhyve In-Reply-To: <201903142108.x2EL8mGv018392@repo.freebsd.org> To: Conrad Meyer Date: Thu, 14 Mar 2019 18:42:43 -0700 (PDT) CC: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Reply-To: rgrimes@freebsd.org X-Mailer: ELM [version 2.4ME+ PL121h (25)] MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII X-Rspamd-Queue-Id: 78DE677EFA X-Spamd-Bar: ------ Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-6.97 / 15.00]; NEURAL_HAM_MEDIUM(-1.00)[-1.000,0]; NEURAL_HAM_SHORT(-0.97)[-0.974,0]; REPLY(-4.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000,0] X-BeenThere: svn-src-all@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: "SVN commit messages for the entire src tree \(except for " user" and " projects" \)" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 15 Mar 2019 01:42:46 -0000 > Author: cem > Date: Thu Mar 14 21:08:48 2019 > New Revision: 345158 > URL: https://svnweb.freebsd.org/changeset/base/345158 > > Log: > bhyve(8): Fix uart emulation bug > > THRE is always asserted in LSR reads, so REG_IER writes that raise > IER_ETXRDY must also set thre_int_pending. > > Reported by: Illumos, according to emaste@ > https://twitter.com/ed_maste/status/1106195949087584258 > MFC after: 2 weeks Per MAINTAINERS this should of had a formal review. And this is already in process from Patrick Mooney via the bhyve developemnt group. Revert this please. > Modified: > head/usr.sbin/bhyve/uart_emul.c > > Modified: head/usr.sbin/bhyve/uart_emul.c > ============================================================================== > --- head/usr.sbin/bhyve/uart_emul.c Thu Mar 14 20:32:48 2019 (r345157) > +++ head/usr.sbin/bhyve/uart_emul.c Thu Mar 14 21:08:48 2019 (r345158) > @@ -431,6 +431,9 @@ uart_write(struct uart_softc *sc, int offset, uint8_t > sc->thre_int_pending = true; > break; > case REG_IER: > + /* Set pending when IER_ETXRDY is raised (edge-triggered). */ > + if ((sc->ier & IER_ETXRDY) == 0 && (value & IER_ETXRDY) != 0) > + sc->thre_int_pending = true; > /* > * Apply mask so that bits 4-7 are 0 > * Also enables bits 0-3 only if they're 1 -- Rod Grimes rgrimes@freebsd.org