[libvirt] [PATCH 02/12] libxl: PCI passthrough support

--- src/libxl/libxl_conf.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++ src/libxl/libxl_conf.h | 2 ++ 2 files changed, 74 insertions(+) diff --git a/src/libxl/libxl_conf.c b/src/libxl/libxl_conf.c index ffc7bbb..7668305 100644 --- a/src/libxl/libxl_conf.c +++ b/src/libxl/libxl_conf.c @@ -759,6 +759,74 @@ error: return -1; } +int +libxlMakePci(virDomainHostdevDefPtr l_hostdev, + libxl_device_pci *x_pci) +{ + if (l_hostdev->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("This driver supports only subsystem host device mode (PCI devices only)")); + return -1; + } + if (l_hostdev->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) { + virReportError(VIR_ERR_CONFIG_UNSUPPORTED, "%s", _("This driver supports only PCI host devices")); + return -1; + } + + x_pci->bus = l_hostdev->source.subsys.u.pci.bus; + x_pci->dev = l_hostdev->source.subsys.u.pci.slot; + x_pci->func = l_hostdev->source.subsys.u.pci.function; + return 0; +} + +static int +libxlMakePciList(virDomainDefPtr def, + libxl_domain_config *d_config) +{ + virDomainHostdevDefPtr *l_hostdevs = def->hostdevs; + int nhostdevs = def->nhostdevs; + int npcidevs = 0; + libxl_device_pci *x_pcidevs; + int i, j; + + if (nhostdevs == 0) + return 0; + + /* count PCI devices, ignore others (USB) */ + for (i = 0; i < nhostdevs; i++) { + if (l_hostdevs[i]->mode == VIR_DOMAIN_HOSTDEV_MODE_SUBSYS && + l_hostdevs[i]->source.subsys.type == VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) + npcidevs++; + } + if (VIR_ALLOC_N(x_pcidevs, npcidevs) < 0) { + virReportOOMError(); + return -1; + } + + for (i = 0, j = 0; i < nhostdevs; i++) { + if (l_hostdevs[i]->mode != VIR_DOMAIN_HOSTDEV_MODE_SUBSYS || + l_hostdevs[i]->source.subsys.type != VIR_DOMAIN_HOSTDEV_SUBSYS_TYPE_PCI) + continue; + + libxl_device_pci_init(&x_pcidevs[j]); + + if (libxlMakePci(l_hostdevs[i], &x_pcidevs[j]) < 0) + goto error; + j++; + } + + d_config->pcidevs = x_pcidevs; + d_config->num_pcidevs = npcidevs; + + return 0; + +error: + for (i = 0; i < npcidevs; i++) { + libxl_device_pci_dispose(&x_pcidevs[i]); + } + VIR_FREE(x_pcidevs); + return -1; +} + virCapsPtr libxlMakeCapabilities(libxl_ctx *ctx) { @@ -817,6 +885,10 @@ libxlBuildDomainConfig(libxlDriverPrivatePtr driver, goto error; } + if (libxlMakePciList(def, d_config) < 0) { + goto error; + } + d_config->on_reboot = def->onReboot; d_config->on_poweroff = def->onPoweroff; d_config->on_crash = def->onCrash; diff --git a/src/libxl/libxl_conf.h b/src/libxl/libxl_conf.h index f8602b4..b3ab3bf 100644 --- a/src/libxl/libxl_conf.h +++ b/src/libxl/libxl_conf.h @@ -119,6 +119,8 @@ libxlMakeNic(virDomainNetDefPtr l_nic, libxl_device_nic *x_nic); int libxlMakeVfb(libxlDriverPrivatePtr driver, virDomainGraphicsDefPtr l_vfb, libxl_device_vfb *x_vfb); +int +libxlMakePci(virDomainHostdevDefPtr l_hostdev, libxl_device_pci *x_pci); int libxlBuildDomainConfig(libxlDriverPrivatePtr driver, -- 1.8.1.4