From patchwork Tue Sep 26 11:32:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Duan, Zhenzhong" X-Patchwork-Id: 13399102 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 040EFE7E628 for ; Tue, 26 Sep 2023 11:50:03 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ql6Y0-00032H-4L; Tue, 26 Sep 2023 07:48:12 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ql6Xy-0002zf-6K; Tue, 26 Sep 2023 07:48:10 -0400 Received: from mgamail.intel.com ([192.55.52.93]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1ql6Xv-0002RC-N6; Tue, 26 Sep 2023 07:48:09 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695728887; x=1727264887; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=BPeSCKBcYSn7Dso+6hdGbPlqMsLlfacGi6Zn0HNxVpk=; b=BfRJLQ39B/jwNrGqQSLsST2msXiuiMV7Fipf4NqBR1X2VT7/qPQAgMFu 6CwmXR409CQ92bPlRMtwb0Ow4iIP0fO28M+5xnA+0ejNFEcTF8nNBE0fD rQ3gn+31wCEA8tQmu4eM3utZ3iPKR0GqDwIaPwvF8cgwzBaJR7ZuDu/at UMoHrCxI3u3rzJ1g9K1ZMtrRLchmwnkz/QQh/MmF7gIxNlLS/qmGHERXf lpLWiA451GB+R1L6WpFoXgu2eDFpCuDDIqpM1FXJA7PdlEU2Lal8OH8iz 0GGECpGjkxakr2fkaoQDoY2G68raRb0w2ENnMIbMGhYfZAz8+832jVYKX Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="378825471" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="378825471" Received: from orsmga002.jf.intel.com ([10.7.209.21]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 04:48:05 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="748789748" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="748789748" Received: from duan-server-s2600bt.bj.intel.com ([10.240.192.147]) by orsmga002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 04:48:00 -0700 From: Zhenzhong Duan To: qemu-devel@nongnu.org Cc: alex.williamson@redhat.com, clg@redhat.com, jgg@nvidia.com, nicolinc@nvidia.com, joao.m.martins@oracle.com, eric.auger@redhat.com, peterx@redhat.com, jasowang@redhat.com, kevin.tian@intel.com, yi.l.liu@intel.com, yi.y.sun@intel.com, chao.p.peng@intel.com, Zhenzhong Duan , Thomas Huth , Eric Farman , Matthew Rosato , qemu-s390x@nongnu.org (open list:S390 general arch...) Subject: [PATCH v2 09/12] vfio/ccw: Use vfio_[attach/detach]_device Date: Tue, 26 Sep 2023 19:32:52 +0800 Message-Id: <20230926113255.1177834-10-zhenzhong.duan@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230926113255.1177834-1-zhenzhong.duan@intel.com> References: <20230926113255.1177834-1-zhenzhong.duan@intel.com> MIME-Version: 1.0 Received-SPF: pass client-ip=192.55.52.93; envelope-from=zhenzhong.duan@intel.com; helo=mgamail.intel.com X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Eric Auger Let the vfio-ccw device use vfio_attach_device() and vfio_detach_device(), hence hiding the details of the used IOMMU backend. Also now all the devices have been migrated to use the new vfio_attach_device/vfio_detach_device API, let's turn the legacy functions into static functions, local to container.c. Signed-off-by: Eric Auger Signed-off-by: Yi Liu Signed-off-by: Zhenzhong Duan --- include/hw/vfio/vfio-common.h | 5 -- hw/vfio/ccw.c | 115 ++++++++-------------------------- hw/vfio/common.c | 10 +-- 3 files changed, 30 insertions(+), 100 deletions(-) diff --git a/include/hw/vfio/vfio-common.h b/include/hw/vfio/vfio-common.h index 12fbfbc37d..c486bdef2a 100644 --- a/include/hw/vfio/vfio-common.h +++ b/include/hw/vfio/vfio-common.h @@ -202,7 +202,6 @@ typedef struct { hwaddr pages; } VFIOBitmap; -void vfio_put_base_device(VFIODevice *vbasedev); void vfio_disable_irqindex(VFIODevice *vbasedev, int index); void vfio_unmask_single_irqindex(VFIODevice *vbasedev, int index); void vfio_mask_single_irqindex(VFIODevice *vbasedev, int index); @@ -220,11 +219,7 @@ void vfio_region_unmap(VFIORegion *region); void vfio_region_exit(VFIORegion *region); void vfio_region_finalize(VFIORegion *region); void vfio_reset_handler(void *opaque); -VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp); -void vfio_put_group(VFIOGroup *group); struct vfio_device_info *vfio_get_device_info(int fd); -int vfio_get_device(VFIOGroup *group, const char *name, - VFIODevice *vbasedev, Error **errp); int vfio_attach_device(char *name, VFIODevice *vbasedev, AddressSpace *as, Error **errp); void vfio_detach_device(VFIODevice *vbasedev); diff --git a/hw/vfio/ccw.c b/hw/vfio/ccw.c index 1e2fce83b0..6893a30ab1 100644 --- a/hw/vfio/ccw.c +++ b/hw/vfio/ccw.c @@ -572,88 +572,14 @@ static void vfio_ccw_put_region(VFIOCCWDevice *vcdev) g_free(vcdev->io_region); } -static void vfio_ccw_put_device(VFIOCCWDevice *vcdev) -{ - g_free(vcdev->vdev.name); - vfio_put_base_device(&vcdev->vdev); -} - -static void vfio_ccw_get_device(VFIOGroup *group, VFIOCCWDevice *vcdev, - Error **errp) -{ - S390CCWDevice *cdev = S390_CCW_DEVICE(vcdev); - char *name = g_strdup_printf("%x.%x.%04x", cdev->hostid.cssid, - cdev->hostid.ssid, - cdev->hostid.devid); - VFIODevice *vbasedev; - - QLIST_FOREACH(vbasedev, &group->device_list, next) { - if (strcmp(vbasedev->name, name) == 0) { - error_setg(errp, "vfio: subchannel %s has already been attached", - name); - goto out_err; - } - } - - /* - * All vfio-ccw devices are believed to operate in a way compatible with - * discarding of memory in RAM blocks, ie. pages pinned in the host are - * in the current working set of the guest driver and therefore never - * overlap e.g., with pages available to the guest balloon driver. This - * needs to be set before vfio_get_device() for vfio common to handle - * ram_block_discard_disable(). - */ - vcdev->vdev.ram_block_discard_allowed = true; - - if (vfio_get_device(group, cdev->mdevid, &vcdev->vdev, errp)) { - goto out_err; - } - - vcdev->vdev.ops = &vfio_ccw_ops; - vcdev->vdev.type = VFIO_DEVICE_TYPE_CCW; - vcdev->vdev.name = name; - vcdev->vdev.dev = DEVICE(vcdev); - - return; - -out_err: - g_free(name); -} - -static VFIOGroup *vfio_ccw_get_group(S390CCWDevice *cdev, Error **errp) -{ - char *tmp, group_path[PATH_MAX]; - ssize_t len; - int groupid; - - tmp = g_strdup_printf("/sys/bus/css/devices/%x.%x.%04x/%s/iommu_group", - cdev->hostid.cssid, cdev->hostid.ssid, - cdev->hostid.devid, cdev->mdevid); - len = readlink(tmp, group_path, sizeof(group_path)); - g_free(tmp); - - if (len <= 0 || len >= sizeof(group_path)) { - error_setg(errp, "vfio: no iommu_group found"); - return NULL; - } - - group_path[len] = 0; - - if (sscanf(basename(group_path), "%d", &groupid) != 1) { - error_setg(errp, "vfio: failed to read %s", group_path); - return NULL; - } - - return vfio_get_group(groupid, &address_space_memory, errp); -} - static void vfio_ccw_realize(DeviceState *dev, Error **errp) { - VFIOGroup *group; S390CCWDevice *cdev = S390_CCW_DEVICE(dev); VFIOCCWDevice *vcdev = VFIO_CCW(cdev); S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev); + VFIODevice *vbasedev = &vcdev->vdev; Error *err = NULL; + int ret; /* Call the class init function for subchannel. */ if (cdc->realize) { @@ -663,14 +589,25 @@ static void vfio_ccw_realize(DeviceState *dev, Error **errp) } } - group = vfio_ccw_get_group(cdev, &err); - if (!group) { - goto out_group_err; - } + vbasedev->ops = &vfio_ccw_ops; + vbasedev->type = VFIO_DEVICE_TYPE_CCW; + vbasedev->name = g_strdup(cdev->mdevid); + vbasedev->dev = &vcdev->cdev.parent_obj.parent_obj; - vfio_ccw_get_device(group, vcdev, &err); - if (err) { - goto out_device_err; + /* + * All vfio-ccw devices are believed to operate in a way compatible with + * discarding of memory in RAM blocks, ie. pages pinned in the host are + * in the current working set of the guest driver and therefore never + * overlap e.g., with pages available to the guest balloon driver. This + * needs to be set before vfio_get_device() for vfio common to handle + * ram_block_discard_disable(). + */ + vbasedev->ram_block_discard_allowed = true; + + ret = vfio_attach_device(vbasedev->name, vbasedev, + &address_space_memory, errp); + if (ret) { + goto out_attach_dev_err; } vfio_ccw_get_region(vcdev, &err); @@ -708,10 +645,9 @@ out_irq_notifier_err: out_io_notifier_err: vfio_ccw_put_region(vcdev); out_region_err: - vfio_ccw_put_device(vcdev); -out_device_err: - vfio_put_group(group); -out_group_err: + vfio_detach_device(vbasedev); +out_attach_dev_err: + g_free(vbasedev->name); if (cdc->unrealize) { cdc->unrealize(cdev); } @@ -724,14 +660,13 @@ static void vfio_ccw_unrealize(DeviceState *dev) S390CCWDevice *cdev = S390_CCW_DEVICE(dev); VFIOCCWDevice *vcdev = VFIO_CCW(cdev); S390CCWDeviceClass *cdc = S390_CCW_DEVICE_GET_CLASS(cdev); - VFIOGroup *group = vcdev->vdev.group; vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_REQ_IRQ_INDEX); vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_CRW_IRQ_INDEX); vfio_ccw_unregister_irq_notifier(vcdev, VFIO_CCW_IO_IRQ_INDEX); vfio_ccw_put_region(vcdev); - vfio_ccw_put_device(vcdev); - vfio_put_group(group); + vfio_detach_device(&vcdev->vdev); + g_free(vcdev->vdev.name); if (cdc->unrealize) { cdc->unrealize(cdev); diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 7f3798b152..65516b319e 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -2335,7 +2335,7 @@ static void vfio_disconnect_container(VFIOGroup *group) } } -VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp) +static VFIOGroup *vfio_get_group(int groupid, AddressSpace *as, Error **errp) { VFIOGroup *group; char path[32]; @@ -2402,7 +2402,7 @@ free_group_exit: return NULL; } -void vfio_put_group(VFIOGroup *group) +static void vfio_put_group(VFIOGroup *group) { if (!group || !QLIST_EMPTY(&group->device_list)) { return; @@ -2447,8 +2447,8 @@ retry: return info; } -int vfio_get_device(VFIOGroup *group, const char *name, - VFIODevice *vbasedev, Error **errp) +static int vfio_get_device(VFIOGroup *group, const char *name, + VFIODevice *vbasedev, Error **errp) { g_autofree struct vfio_device_info *info = NULL; int fd; @@ -2506,7 +2506,7 @@ int vfio_get_device(VFIOGroup *group, const char *name, return 0; } -void vfio_put_base_device(VFIODevice *vbasedev) +static void vfio_put_base_device(VFIODevice *vbasedev) { if (!vbasedev->group) { return;