From: Eric Auger <eric.auger@redhat.com>
To: Zhenzhong Duan <zhenzhong.duan@intel.com>, qemu-devel@nongnu.org
Cc: alex.williamson@redhat.com, clg@redhat.com, jgg@nvidia.com,
nicolinc@nvidia.com, joao.m.martins@oracle.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
Subject: Re: [PATCH v6 08/21] vfio/pci: Introduce a vfio pci hot reset interface
Date: Wed, 15 Nov 2023 18:54:07 +0100 [thread overview]
Message-ID: <7a28f5f6-68a7-4920-b222-3a8a0f9bb771@redhat.com> (raw)
In-Reply-To: <20231114100955.1961974-9-zhenzhong.duan@intel.com>
On 11/14/23 11:09, Zhenzhong Duan wrote:
> Legacy vfio pci and iommufd cdev have different process to hot reset
> vfio device, expand current code to abstract out pci_hot_reset callback
> for legacy vfio, this same interface will also be used by iommufd
> cdev vfio device.
>
> Rename vfio_pci_hot_reset to vfio_legacy_pci_hot_reset and move it
> into container.c.
>
> vfio_pci_[pre/post]_reset and vfio_pci_host_match are exported so
> they could be called in legacy and iommufd pci_hot_reset callback.
>
> Suggested-by: Cédric Le Goater <clg@redhat.com>
> Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Eric
> ---
> v6: pci_hot_reset return -errno if fails
>
> hw/vfio/pci.h | 3 +
> include/hw/vfio/vfio-container-base.h | 3 +
> hw/vfio/container.c | 170 ++++++++++++++++++++++++++
> hw/vfio/pci.c | 168 +------------------------
> 4 files changed, 182 insertions(+), 162 deletions(-)
>
> diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h
> index 1006061afb..6e64a2654e 100644
> --- a/hw/vfio/pci.h
> +++ b/hw/vfio/pci.h
> @@ -218,6 +218,9 @@ void vfio_probe_igd_bar4_quirk(VFIOPCIDevice *vdev, int nr);
>
> extern const PropertyInfo qdev_prop_nv_gpudirect_clique;
>
> +void vfio_pci_pre_reset(VFIOPCIDevice *vdev);
> +void vfio_pci_post_reset(VFIOPCIDevice *vdev);
> +bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name);
> int vfio_pci_get_pci_hot_reset_info(VFIOPCIDevice *vdev,
> struct vfio_pci_hot_reset_info **info_p);
>
> diff --git a/include/hw/vfio/vfio-container-base.h b/include/hw/vfio/vfio-container-base.h
> index 4b6f017c6f..45bb19c767 100644
> --- a/include/hw/vfio/vfio-container-base.h
> +++ b/include/hw/vfio/vfio-container-base.h
> @@ -106,6 +106,9 @@ struct VFIOIOMMUOps {
> int (*set_dirty_page_tracking)(VFIOContainerBase *bcontainer, bool start);
> int (*query_dirty_bitmap)(VFIOContainerBase *bcontainer, VFIOBitmap *vbmap,
> hwaddr iova, hwaddr size);
> + /* PCI specific */
> + int (*pci_hot_reset)(VFIODevice *vbasedev, bool single);
> +
> /* SPAPR specific */
> int (*add_window)(VFIOContainerBase *bcontainer,
> MemoryRegionSection *section,
> diff --git a/hw/vfio/container.c b/hw/vfio/container.c
> index ed2d721b2b..1dbf9b9a17 100644
> --- a/hw/vfio/container.c
> +++ b/hw/vfio/container.c
> @@ -33,6 +33,7 @@
> #include "trace.h"
> #include "qapi/error.h"
> #include "migration/migration.h"
> +#include "pci.h"
>
> VFIOGroupList vfio_group_list =
> QLIST_HEAD_INITIALIZER(vfio_group_list);
> @@ -922,6 +923,174 @@ static void vfio_legacy_detach_device(VFIODevice *vbasedev)
> vfio_put_group(group);
> }
>
> +static int vfio_legacy_pci_hot_reset(VFIODevice *vbasedev, bool single)
> +{
> + VFIOPCIDevice *vdev = container_of(vbasedev, VFIOPCIDevice, vbasedev);
> + VFIOGroup *group;
> + struct vfio_pci_hot_reset_info *info = NULL;
> + struct vfio_pci_dependent_device *devices;
> + struct vfio_pci_hot_reset *reset;
> + int32_t *fds;
> + int ret, i, count;
> + bool multi = false;
> +
> + trace_vfio_pci_hot_reset(vdev->vbasedev.name, single ? "one" : "multi");
> +
> + if (!single) {
> + vfio_pci_pre_reset(vdev);
> + }
> + vdev->vbasedev.needs_reset = false;
> +
> + ret = vfio_pci_get_pci_hot_reset_info(vdev, &info);
> +
> + if (ret) {
> + goto out_single;
> + }
> + devices = &info->devices[0];
> +
> + trace_vfio_pci_hot_reset_has_dep_devices(vdev->vbasedev.name);
> +
> + /* Verify that we have all the groups required */
> + for (i = 0; i < info->count; i++) {
> + PCIHostDeviceAddress host;
> + VFIOPCIDevice *tmp;
> + VFIODevice *vbasedev_iter;
> +
> + host.domain = devices[i].segment;
> + host.bus = devices[i].bus;
> + host.slot = PCI_SLOT(devices[i].devfn);
> + host.function = PCI_FUNC(devices[i].devfn);
> +
> + trace_vfio_pci_hot_reset_dep_devices(host.domain,
> + host.bus, host.slot, host.function, devices[i].group_id);
> +
> + if (vfio_pci_host_match(&host, vdev->vbasedev.name)) {
> + continue;
> + }
> +
> + QLIST_FOREACH(group, &vfio_group_list, next) {
> + if (group->groupid == devices[i].group_id) {
> + break;
> + }
> + }
> +
> + if (!group) {
> + if (!vdev->has_pm_reset) {
> + error_report("vfio: Cannot reset device %s, "
> + "depends on group %d which is not owned.",
> + vdev->vbasedev.name, devices[i].group_id);
> + }
> + ret = -EPERM;
> + goto out;
> + }
> +
> + /* Prep dependent devices for reset and clear our marker. */
> + QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
> + if (!vbasedev_iter->dev->realized ||
> + vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
> + continue;
> + }
> + tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
> + if (vfio_pci_host_match(&host, tmp->vbasedev.name)) {
> + if (single) {
> + ret = -EINVAL;
> + goto out_single;
> + }
> + vfio_pci_pre_reset(tmp);
> + tmp->vbasedev.needs_reset = false;
> + multi = true;
> + break;
> + }
> + }
> + }
> +
> + if (!single && !multi) {
> + ret = -EINVAL;
> + goto out_single;
> + }
> +
> + /* Determine how many group fds need to be passed */
> + count = 0;
> + QLIST_FOREACH(group, &vfio_group_list, next) {
> + for (i = 0; i < info->count; i++) {
> + if (group->groupid == devices[i].group_id) {
> + count++;
> + break;
> + }
> + }
> + }
> +
> + reset = g_malloc0(sizeof(*reset) + (count * sizeof(*fds)));
> + reset->argsz = sizeof(*reset) + (count * sizeof(*fds));
> + fds = &reset->group_fds[0];
> +
> + /* Fill in group fds */
> + QLIST_FOREACH(group, &vfio_group_list, next) {
> + for (i = 0; i < info->count; i++) {
> + if (group->groupid == devices[i].group_id) {
> + fds[reset->count++] = group->fd;
> + break;
> + }
> + }
> + }
> +
> + /* Bus reset! */
> + ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_PCI_HOT_RESET, reset);
> + g_free(reset);
> + if (ret) {
> + ret = -errno;
> + }
> +
> + trace_vfio_pci_hot_reset_result(vdev->vbasedev.name,
> + ret ? strerror(errno) : "Success");
> +
> +out:
> + /* Re-enable INTx on affected devices */
> + for (i = 0; i < info->count; i++) {
> + PCIHostDeviceAddress host;
> + VFIOPCIDevice *tmp;
> + VFIODevice *vbasedev_iter;
> +
> + host.domain = devices[i].segment;
> + host.bus = devices[i].bus;
> + host.slot = PCI_SLOT(devices[i].devfn);
> + host.function = PCI_FUNC(devices[i].devfn);
> +
> + if (vfio_pci_host_match(&host, vdev->vbasedev.name)) {
> + continue;
> + }
> +
> + QLIST_FOREACH(group, &vfio_group_list, next) {
> + if (group->groupid == devices[i].group_id) {
> + break;
> + }
> + }
> +
> + if (!group) {
> + break;
> + }
> +
> + QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
> + if (!vbasedev_iter->dev->realized ||
> + vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
> + continue;
> + }
> + tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
> + if (vfio_pci_host_match(&host, tmp->vbasedev.name)) {
> + vfio_pci_post_reset(tmp);
> + break;
> + }
> + }
> + }
> +out_single:
> + if (!single) {
> + vfio_pci_post_reset(vdev);
> + }
> + g_free(info);
> +
> + return ret;
> +}
> +
> const VFIOIOMMUOps vfio_legacy_ops = {
> .dma_map = vfio_legacy_dma_map,
> .dma_unmap = vfio_legacy_dma_unmap,
> @@ -929,4 +1098,5 @@ const VFIOIOMMUOps vfio_legacy_ops = {
> .detach_device = vfio_legacy_detach_device,
> .set_dirty_page_tracking = vfio_legacy_set_dirty_page_tracking,
> .query_dirty_bitmap = vfio_legacy_query_dirty_bitmap,
> + .pci_hot_reset = vfio_legacy_pci_hot_reset,
> };
> diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c
> index eb55e8ae88..d00c3472c7 100644
> --- a/hw/vfio/pci.c
> +++ b/hw/vfio/pci.c
> @@ -2374,7 +2374,7 @@ static int vfio_add_capabilities(VFIOPCIDevice *vdev, Error **errp)
> return 0;
> }
>
> -static void vfio_pci_pre_reset(VFIOPCIDevice *vdev)
> +void vfio_pci_pre_reset(VFIOPCIDevice *vdev)
> {
> PCIDevice *pdev = &vdev->pdev;
> uint16_t cmd;
> @@ -2411,7 +2411,7 @@ static void vfio_pci_pre_reset(VFIOPCIDevice *vdev)
> vfio_pci_write_config(pdev, PCI_COMMAND, cmd, 2);
> }
>
> -static void vfio_pci_post_reset(VFIOPCIDevice *vdev)
> +void vfio_pci_post_reset(VFIOPCIDevice *vdev)
> {
> Error *err = NULL;
> int nr;
> @@ -2435,7 +2435,7 @@ static void vfio_pci_post_reset(VFIOPCIDevice *vdev)
> vfio_quirk_reset(vdev);
> }
>
> -static bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name)
> +bool vfio_pci_host_match(PCIHostDeviceAddress *addr, const char *name)
> {
> char tmp[13];
>
> @@ -2485,166 +2485,10 @@ int vfio_pci_get_pci_hot_reset_info(VFIOPCIDevice *vdev,
>
> static int vfio_pci_hot_reset(VFIOPCIDevice *vdev, bool single)
> {
> - VFIOGroup *group;
> - struct vfio_pci_hot_reset_info *info = NULL;
> - struct vfio_pci_dependent_device *devices;
> - struct vfio_pci_hot_reset *reset;
> - int32_t *fds;
> - int ret, i, count;
> - bool multi = false;
> -
> - trace_vfio_pci_hot_reset(vdev->vbasedev.name, single ? "one" : "multi");
> -
> - if (!single) {
> - vfio_pci_pre_reset(vdev);
> - }
> - vdev->vbasedev.needs_reset = false;
> -
> - ret = vfio_pci_get_pci_hot_reset_info(vdev, &info);
> -
> - if (ret) {
> - goto out_single;
> - }
> - devices = &info->devices[0];
> -
> - trace_vfio_pci_hot_reset_has_dep_devices(vdev->vbasedev.name);
> -
> - /* Verify that we have all the groups required */
> - for (i = 0; i < info->count; i++) {
> - PCIHostDeviceAddress host;
> - VFIOPCIDevice *tmp;
> - VFIODevice *vbasedev_iter;
> -
> - host.domain = devices[i].segment;
> - host.bus = devices[i].bus;
> - host.slot = PCI_SLOT(devices[i].devfn);
> - host.function = PCI_FUNC(devices[i].devfn);
> -
> - trace_vfio_pci_hot_reset_dep_devices(host.domain,
> - host.bus, host.slot, host.function, devices[i].group_id);
> -
> - if (vfio_pci_host_match(&host, vdev->vbasedev.name)) {
> - continue;
> - }
> -
> - QLIST_FOREACH(group, &vfio_group_list, next) {
> - if (group->groupid == devices[i].group_id) {
> - break;
> - }
> - }
> -
> - if (!group) {
> - if (!vdev->has_pm_reset) {
> - error_report("vfio: Cannot reset device %s, "
> - "depends on group %d which is not owned.",
> - vdev->vbasedev.name, devices[i].group_id);
> - }
> - ret = -EPERM;
> - goto out;
> - }
> -
> - /* Prep dependent devices for reset and clear our marker. */
> - QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
> - if (!vbasedev_iter->dev->realized ||
> - vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
> - continue;
> - }
> - tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
> - if (vfio_pci_host_match(&host, tmp->vbasedev.name)) {
> - if (single) {
> - ret = -EINVAL;
> - goto out_single;
> - }
> - vfio_pci_pre_reset(tmp);
> - tmp->vbasedev.needs_reset = false;
> - multi = true;
> - break;
> - }
> - }
> - }
> -
> - if (!single && !multi) {
> - ret = -EINVAL;
> - goto out_single;
> - }
> -
> - /* Determine how many group fds need to be passed */
> - count = 0;
> - QLIST_FOREACH(group, &vfio_group_list, next) {
> - for (i = 0; i < info->count; i++) {
> - if (group->groupid == devices[i].group_id) {
> - count++;
> - break;
> - }
> - }
> - }
> -
> - reset = g_malloc0(sizeof(*reset) + (count * sizeof(*fds)));
> - reset->argsz = sizeof(*reset) + (count * sizeof(*fds));
> - fds = &reset->group_fds[0];
> -
> - /* Fill in group fds */
> - QLIST_FOREACH(group, &vfio_group_list, next) {
> - for (i = 0; i < info->count; i++) {
> - if (group->groupid == devices[i].group_id) {
> - fds[reset->count++] = group->fd;
> - break;
> - }
> - }
> - }
> -
> - /* Bus reset! */
> - ret = ioctl(vdev->vbasedev.fd, VFIO_DEVICE_PCI_HOT_RESET, reset);
> - g_free(reset);
> -
> - trace_vfio_pci_hot_reset_result(vdev->vbasedev.name,
> - ret ? strerror(errno) : "Success");
> -
> -out:
> - /* Re-enable INTx on affected devices */
> - for (i = 0; i < info->count; i++) {
> - PCIHostDeviceAddress host;
> - VFIOPCIDevice *tmp;
> - VFIODevice *vbasedev_iter;
> -
> - host.domain = devices[i].segment;
> - host.bus = devices[i].bus;
> - host.slot = PCI_SLOT(devices[i].devfn);
> - host.function = PCI_FUNC(devices[i].devfn);
> -
> - if (vfio_pci_host_match(&host, vdev->vbasedev.name)) {
> - continue;
> - }
> -
> - QLIST_FOREACH(group, &vfio_group_list, next) {
> - if (group->groupid == devices[i].group_id) {
> - break;
> - }
> - }
> -
> - if (!group) {
> - break;
> - }
> -
> - QLIST_FOREACH(vbasedev_iter, &group->device_list, next) {
> - if (!vbasedev_iter->dev->realized ||
> - vbasedev_iter->type != VFIO_DEVICE_TYPE_PCI) {
> - continue;
> - }
> - tmp = container_of(vbasedev_iter, VFIOPCIDevice, vbasedev);
> - if (vfio_pci_host_match(&host, tmp->vbasedev.name)) {
> - vfio_pci_post_reset(tmp);
> - break;
> - }
> - }
> - }
> -out_single:
> - if (!single) {
> - vfio_pci_post_reset(vdev);
> - }
> - g_free(info);
> + VFIODevice *vbasedev = &vdev->vbasedev;
> + const VFIOIOMMUOps *ops = vbasedev->bcontainer->ops;
>
> - return ret;
> + return ops->pci_hot_reset(vbasedev, single);
> }
>
> /*
next prev parent reply other threads:[~2023-11-15 17:54 UTC|newest]
Thread overview: 82+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-14 10:09 [PATCH v6 00/21] vfio: Adopt iommufd Zhenzhong Duan
2023-11-14 10:09 ` [PATCH v6 01/21] backends/iommufd: Introduce the iommufd object Zhenzhong Duan
2023-11-14 13:28 ` Cédric Le Goater
2023-11-15 4:06 ` Duan, Zhenzhong
2023-11-15 8:15 ` Cédric Le Goater
2023-11-15 12:52 ` Eric Auger
2023-11-16 4:04 ` Duan, Zhenzhong
2023-11-16 8:32 ` Eric Auger
2023-11-16 8:47 ` Duan, Zhenzhong
2023-11-17 11:09 ` Cédric Le Goater
2023-11-17 11:39 ` Duan, Zhenzhong
2023-11-17 12:56 ` Cédric Le Goater
2023-11-17 13:29 ` Eric Auger
2023-11-17 13:56 ` Cédric Le Goater
2023-11-20 3:06 ` Duan, Zhenzhong
2023-11-20 8:24 ` Cédric Le Goater
2023-11-20 10:07 ` Duan, Zhenzhong
2023-11-20 17:08 ` Cédric Le Goater
2023-11-21 3:26 ` Duan, Zhenzhong
2023-11-21 8:05 ` Cédric Le Goater
2023-11-21 8:39 ` Duan, Zhenzhong
2023-11-14 10:09 ` [PATCH v6 02/21] util/char_dev: Add open_cdev() Zhenzhong Duan
2023-11-14 13:29 ` Cédric Le Goater
2023-11-15 13:23 ` Eric Auger
2023-11-14 10:09 ` [PATCH v6 03/21] vfio/common: return early if space isn't empty Zhenzhong Duan
2023-11-14 13:29 ` Cédric Le Goater
2023-11-15 13:28 ` Eric Auger
2023-11-14 10:09 ` [PATCH v6 04/21] vfio/iommufd: Implement the iommufd backend Zhenzhong Duan
2023-11-14 13:36 ` Cédric Le Goater
2023-11-14 10:09 ` [PATCH v6 05/21] vfio/iommufd: Relax assert check for " Zhenzhong Duan
2023-11-15 13:56 ` Eric Auger
2023-11-14 10:09 ` [PATCH v6 06/21] vfio/iommufd: Add support for iova_ranges and pgsizes Zhenzhong Duan
2023-11-14 13:46 ` Cédric Le Goater
2023-11-15 2:36 ` Duan, Zhenzhong
2023-11-15 16:25 ` Eric Auger
2023-11-14 10:09 ` [PATCH v6 07/21] vfio/pci: Extract out a helper vfio_pci_get_pci_hot_reset_info Zhenzhong Duan
2023-11-15 17:00 ` Eric Auger
2023-11-14 10:09 ` [PATCH v6 08/21] vfio/pci: Introduce a vfio pci hot reset interface Zhenzhong Duan
2023-11-14 13:51 ` Cédric Le Goater
2023-11-15 2:55 ` Duan, Zhenzhong
2023-11-15 17:54 ` Eric Auger [this message]
2023-11-14 10:09 ` [PATCH v6 09/21] vfio/iommufd: Enable pci hot reset through iommufd cdev interface Zhenzhong Duan
2023-11-17 13:53 ` Eric Auger
2023-11-20 4:15 ` Duan, Zhenzhong
2023-11-14 10:09 ` [PATCH v6 10/21] vfio/pci: Allow the selection of a given iommu backend Zhenzhong Duan
2023-11-14 13:57 ` Cédric Le Goater
2023-11-14 10:09 ` [PATCH v6 11/21] vfio/pci: Make vfio cdev pre-openable by passing a file handle Zhenzhong Duan
2023-11-14 14:08 ` Cédric Le Goater
2023-11-15 12:09 ` Philippe Mathieu-Daudé
2023-11-15 13:05 ` Cédric Le Goater
2023-11-16 2:15 ` Duan, Zhenzhong
2023-11-16 7:25 ` Cédric Le Goater
2023-11-16 7:43 ` Duan, Zhenzhong
2023-11-14 10:09 ` [PATCH v6 12/21] vfio/platform: Allow the selection of a given iommu backend Zhenzhong Duan
2023-11-14 14:03 ` Cédric Le Goater
2023-11-17 14:55 ` Eric Auger
2023-11-14 10:09 ` [PATCH v6 13/21] vfio/platform: Make vfio cdev pre-openable by passing a file handle Zhenzhong Duan
2023-11-14 14:22 ` Cédric Le Goater
2023-11-14 10:09 ` [PATCH v6 14/21] vfio/ap: Allow the selection of a given iommu backend Zhenzhong Duan
2023-11-14 14:03 ` Cédric Le Goater
2023-11-14 10:09 ` [PATCH v6 15/21] vfio/ap: Make vfio cdev pre-openable by passing a file handle Zhenzhong Duan
2023-11-14 14:04 ` Cédric Le Goater
2023-11-14 10:09 ` [PATCH v6 16/21] vfio/ccw: Allow the selection of a given iommu backend Zhenzhong Duan
2023-11-14 14:04 ` Cédric Le Goater
2023-11-15 18:45 ` Eric Farman
2023-11-14 10:09 ` [PATCH v6 17/21] vfio/ccw: Make vfio cdev pre-openable by passing a file handle Zhenzhong Duan
2023-11-14 14:04 ` Cédric Le Goater
2023-11-15 18:46 ` Eric Farman
2023-11-14 10:09 ` [PATCH v6 18/21] vfio: Make VFIOContainerBase poiner parameter const in VFIOIOMMUOps callbacks Zhenzhong Duan
2023-11-14 14:05 ` Cédric Le Goater
2023-11-17 14:58 ` Eric Auger
2023-11-14 10:09 ` [PATCH v6 19/21] hw/arm: Activate IOMMUFD for virt machines Zhenzhong Duan
2023-11-16 9:17 ` Eric Auger
2023-11-14 10:09 ` [PATCH v6 20/21] kconfig: Activate IOMMUFD for s390x machines Zhenzhong Duan
2023-11-15 18:47 ` Eric Farman
2023-11-14 10:09 ` [PATCH v6 21/21] hw/i386: Activate IOMMUFD for q35 machines Zhenzhong Duan
2023-11-16 9:17 ` Eric Auger
2023-11-14 14:51 ` [PATCH v6 00/21] vfio: Adopt iommufd Cédric Le Goater
2023-11-15 4:16 ` Duan, Zhenzhong
2023-11-20 9:15 ` Eric Auger
2023-11-20 10:09 ` Duan, Zhenzhong
2023-11-20 11:22 ` Eric Auger
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