From owner-dev-commits-src-all@freebsd.org Sat Apr 3 06:20:01 2021 Return-Path: Delivered-To: dev-commits-src-all@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 364755C1313; Sat, 3 Apr 2021 06:20:01 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "R3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4FC6GT0nY9z3GPV; Sat, 3 Apr 2021 06:20:01 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org (gitrepo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:5]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 02D2B5EF1; Sat, 3 Apr 2021 06:20:01 +0000 (UTC) (envelope-from git@FreeBSD.org) Received: from gitrepo.freebsd.org ([127.0.1.44]) by gitrepo.freebsd.org (8.16.1/8.16.1) with ESMTP id 1336K0nK034058; Sat, 3 Apr 2021 06:20:00 GMT (envelope-from git@gitrepo.freebsd.org) Received: (from git@localhost) by gitrepo.freebsd.org (8.16.1/8.16.1/Submit) id 1336K0sn034047; Sat, 3 Apr 2021 06:20:00 GMT (envelope-from git) Date: Sat, 3 Apr 2021 06:20:00 GMT Message-Id: <202104030620.1336K0sn034047@gitrepo.freebsd.org> To: src-committers@FreeBSD.org, dev-commits-src-all@FreeBSD.org, dev-commits-src-branches@FreeBSD.org From: Ka Ho Ng Subject: git: 2e107638eac2 - stable/13 - virtio_pci_legacy: Allow memory space for configuration MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit X-Git-Committer: khng X-Git-Repository: src X-Git-Refname: refs/heads/stable/13 X-Git-Reftype: branch X-Git-Commit: 2e107638eac2a721bc024314ae79d4688edfc130 Auto-Submitted: auto-generated X-BeenThere: dev-commits-src-all@freebsd.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Commit messages for all branches of the src repository List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 03 Apr 2021 06:20:01 -0000 The branch stable/13 has been updated by khng: URL: https://cgit.FreeBSD.org/src/commit/?id=2e107638eac2a721bc024314ae79d4688edfc130 commit 2e107638eac2a721bc024314ae79d4688edfc130 Author: Ka Ho Ng AuthorDate: 2021-03-20 07:40:55 +0000 Commit: Ka Ho Ng CommitDate: 2021-04-03 06:09:50 +0000 virtio_pci_legacy: Allow memory space for configuration For guests running under some kind of VMMs, configuration structure is available in memory space but not I/O space. Reported by: Yuan Rui Reviewed by: rpokala, bryanv, jhb Approved by: philip (mentor) Differential Revision: https://reviews.freebsd.org/D28818 (cherry picked from commit cf5d1112408ddef3fdff8212599727c49ba90fa4) --- sys/dev/virtio/pci/virtio_pci_legacy.c | 24 ++++++++++++++++++------ 1 file changed, 18 insertions(+), 6 deletions(-) diff --git a/sys/dev/virtio/pci/virtio_pci_legacy.c b/sys/dev/virtio/pci/virtio_pci_legacy.c index d74983099110..a17dd22aa953 100644 --- a/sys/dev/virtio/pci/virtio_pci_legacy.c +++ b/sys/dev/virtio/pci/virtio_pci_legacy.c @@ -59,6 +59,7 @@ __FBSDID("$FreeBSD$"); struct vtpci_legacy_softc { device_t vtpci_dev; struct vtpci_common vtpci_common; + int vtpci_res_type; struct resource *vtpci_res; struct resource *vtpci_msix_table_res; struct resource *vtpci_msix_pba_res; @@ -231,7 +232,7 @@ vtpci_legacy_attach(device_t dev) error = vtpci_legacy_alloc_resources(sc); if (error) { - device_printf(dev, "cannot map I/O space\n"); + device_printf(dev, "cannot map I/O space nor memory space\n"); return (error); } @@ -601,14 +602,25 @@ vtpci_legacy_teardown_msix(struct vtpci_legacy_softc *sc) static int vtpci_legacy_alloc_resources(struct vtpci_legacy_softc *sc) { + const int res_types[] = { SYS_RES_IOPORT, SYS_RES_MEMORY }; device_t dev; - int rid; + int rid, i; dev = sc->vtpci_dev; - rid = PCIR_BAR(0); - if ((sc->vtpci_res = bus_alloc_resource_any(dev, SYS_RES_IOPORT, - &rid, RF_ACTIVE)) == NULL) + /* + * Most hypervisors export the common configuration structure in IO + * space, but some use memory space; try both. + */ + for (i = 0; nitems(res_types); i++) { + rid = PCIR_BAR(0); + sc->vtpci_res_type = res_types[i]; + sc->vtpci_res = bus_alloc_resource_any(dev, res_types[i], &rid, + RF_ACTIVE); + if (sc->vtpci_res != NULL) + break; + } + if (sc->vtpci_res == NULL) return (ENXIO); return (0); @@ -622,7 +634,7 @@ vtpci_legacy_free_resources(struct vtpci_legacy_softc *sc) dev = sc->vtpci_dev; if (sc->vtpci_res != NULL) { - bus_release_resource(dev, SYS_RES_IOPORT, PCIR_BAR(0), + bus_release_resource(dev, sc->vtpci_res_type, PCIR_BAR(0), sc->vtpci_res); sc->vtpci_res = NULL; }