diff options
Diffstat (limited to 'hw/s390x/s390-pci-vfio.c')
| -rw-r--r-- | hw/s390x/s390-pci-vfio.c | 129 |
1 files changed, 109 insertions, 20 deletions
diff --git a/hw/s390x/s390-pci-vfio.c b/hw/s390x/s390-pci-vfio.c index 6f80a47e29..2aefa508a0 100644 --- a/hw/s390x/s390-pci-vfio.c +++ b/hw/s390x/s390-pci-vfio.c @@ -124,18 +124,44 @@ static void s390_pci_read_base(S390PCIBusDevice *pbdev, pbdev->zpci_fn.pft = 0; } +static bool get_host_fh(S390PCIBusDevice *pbdev, struct vfio_device_info *info, + uint32_t *fh) +{ + struct vfio_info_cap_header *hdr; + struct vfio_device_info_cap_zpci_base *cap; + VFIOPCIDevice *vpci = container_of(pbdev->pdev, VFIOPCIDevice, pdev); + + hdr = vfio_get_device_info_cap(info, VFIO_DEVICE_INFO_CAP_ZPCI_BASE); + + /* Can only get the host fh with version 2 or greater */ + if (hdr == NULL || hdr->version < 2) { + trace_s390_pci_clp_cap(vpci->vbasedev.name, + VFIO_DEVICE_INFO_CAP_ZPCI_BASE); + return false; + } + cap = (void *) hdr; + + *fh = cap->fh; + return true; +} + static void s390_pci_read_group(S390PCIBusDevice *pbdev, struct vfio_device_info *info) { struct vfio_info_cap_header *hdr; struct vfio_device_info_cap_zpci_group *cap; + S390pciState *s = s390_get_phb(); ClpRspQueryPciGrp *resgrp; VFIOPCIDevice *vpci = container_of(pbdev->pdev, VFIOPCIDevice, pdev); + uint8_t start_gid = pbdev->zpci_fn.pfgid; hdr = vfio_get_device_info_cap(info, VFIO_DEVICE_INFO_CAP_ZPCI_GROUP); - /* If capability not provided, just use the default group */ - if (hdr == NULL) { + /* + * If capability not provided or the underlying hostdev is simulated, just + * use the default group. + */ + if (hdr == NULL || pbdev->zpci_fn.pfgid >= ZPCI_SIM_GRP_START) { trace_s390_pci_clp_cap(vpci->vbasedev.name, VFIO_DEVICE_INFO_CAP_ZPCI_GROUP); pbdev->zpci_fn.pfgid = ZPCI_DEFAULT_FN_GRP; @@ -144,11 +170,40 @@ static void s390_pci_read_group(S390PCIBusDevice *pbdev, } cap = (void *) hdr; + /* + * For an intercept device, let's use an existing simulated group if one + * one was already created for other intercept devices in this group. + * If not, create a new simulated group if any are still available. + * If all else fails, just fall back on the default group. + */ + if (!pbdev->interp) { + pbdev->pci_group = s390_group_find_host_sim(pbdev->zpci_fn.pfgid); + if (pbdev->pci_group) { + /* Use existing simulated group */ + pbdev->zpci_fn.pfgid = pbdev->pci_group->id; + return; + } else { + if (s->next_sim_grp == ZPCI_DEFAULT_FN_GRP) { + /* All out of simulated groups, use default */ + trace_s390_pci_clp_cap(vpci->vbasedev.name, + VFIO_DEVICE_INFO_CAP_ZPCI_GROUP); + pbdev->zpci_fn.pfgid = ZPCI_DEFAULT_FN_GRP; + pbdev->pci_group = s390_group_find(ZPCI_DEFAULT_FN_GRP); + return; + } else { + /* We can assign a new simulated group */ + pbdev->zpci_fn.pfgid = s->next_sim_grp; + s->next_sim_grp++; + /* Fall through to create the new sim group using CLP info */ + } + } + } + /* See if the PCI group is already defined, create if not */ pbdev->pci_group = s390_group_find(pbdev->zpci_fn.pfgid); if (!pbdev->pci_group) { - pbdev->pci_group = s390_group_create(pbdev->zpci_fn.pfgid); + pbdev->pci_group = s390_group_create(pbdev->zpci_fn.pfgid, start_gid); resgrp = &pbdev->pci_group->zpci_group; if (cap->flags & VFIO_DEVICE_INFO_ZPCI_FLAG_REFRESH) { @@ -158,7 +213,11 @@ static void s390_pci_read_group(S390PCIBusDevice *pbdev, resgrp->msia = cap->msi_addr; resgrp->mui = cap->mui; resgrp->i = cap->noi; - resgrp->maxstbl = cap->maxstbl; + if (pbdev->interp && hdr->version >= 2) { + resgrp->maxstbl = cap->imaxstbl; + } else { + resgrp->maxstbl = cap->maxstbl; + } resgrp->version = cap->version; resgrp->dtsm = ZPCI_DTSM; } @@ -217,25 +276,13 @@ static void s390_pci_read_pfip(S390PCIBusDevice *pbdev, memcpy(pbdev->zpci_fn.pfip, cap->pfip, CLP_PFIP_NR_SEGMENTS); } -/* - * This function will issue the VFIO_DEVICE_GET_INFO ioctl and look for - * capabilities that contain information about CLP features provided by the - * underlying host. - * On entry, defaults have already been placed into the guest CLP response - * buffers. On exit, defaults will have been overwritten for any CLP features - * found in the capability chain; defaults will remain for any CLP features not - * found in the chain. - */ -void s390_pci_get_clp_info(S390PCIBusDevice *pbdev) +static struct vfio_device_info *get_device_info(S390PCIBusDevice *pbdev, + uint32_t argsz) { - g_autofree struct vfio_device_info *info = NULL; + struct vfio_device_info *info = g_malloc0(argsz); VFIOPCIDevice *vfio_pci; - uint32_t argsz; int fd; - argsz = sizeof(*info); - info = g_malloc0(argsz); - vfio_pci = container_of(pbdev->pdev, VFIOPCIDevice, pdev); fd = vfio_pci->vbasedev.fd; @@ -250,7 +297,8 @@ retry: if (ioctl(fd, VFIO_DEVICE_GET_INFO, info)) { trace_s390_pci_clp_dev_info(vfio_pci->vbasedev.name); - return; + g_free(info); + return NULL; } if (info->argsz > argsz) { @@ -259,6 +307,47 @@ retry: goto retry; } + return info; +} + +/* + * Get the host function handle from the vfio CLP capabilities chain. Returns + * true if a fh value was placed into the provided buffer. Returns false + * if a fh could not be obtained (ioctl failed or capabilitiy version does + * not include the fh) + */ +bool s390_pci_get_host_fh(S390PCIBusDevice *pbdev, uint32_t *fh) +{ + g_autofree struct vfio_device_info *info = NULL; + + assert(fh); + + info = get_device_info(pbdev, sizeof(*info)); + if (!info) { + return false; + } + + return get_host_fh(pbdev, info, fh); +} + +/* + * This function will issue the VFIO_DEVICE_GET_INFO ioctl and look for + * capabilities that contain information about CLP features provided by the + * underlying host. + * On entry, defaults have already been placed into the guest CLP response + * buffers. On exit, defaults will have been overwritten for any CLP features + * found in the capability chain; defaults will remain for any CLP features not + * found in the chain. + */ +void s390_pci_get_clp_info(S390PCIBusDevice *pbdev) +{ + g_autofree struct vfio_device_info *info = NULL; + + info = get_device_info(pbdev, sizeof(*info)); + if (!info) { + return; + } + /* * Find the CLP features provided and fill in the guest CLP responses. * Always call s390_pci_read_base first as information from this could |