search for: viommu_pci_find_cap

...add_iommu(viommu); > + > + return 0; > +err_free: > + list_for_each_entry_safe(ep, next, &endpoints, list) > + kfree(ep); > + kfree(viommu); > + return ret; > +} > + > +#define VPCI_FIELD(field) offsetof(struct virtio_pci_cap, field) > + > +static inline int viommu_pci_find_capability(struct pci_dev *dev, u8 cfg_type, > + struct viommu_cap_config *cap) not sure the inline is useful here > +{ > + int pos; > + u8 bar; > + > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > + pos > 0; > + pos = pci_find_next_capability(de...

...gt; + void __iomem *regs, *common_regs; > + struct viommu_cap_config cap = {0}; > + struct virtio_pci_common_cfg __iomem *common_cfg; > + > + /* > + * The virtio infrastructure might not be loaded at this point. We need > + * to access the BARs ourselves. > + */ > + ret = viommu_pci_find_capability(dev, VIRTIO_PCI_CAP_COMMON_CFG, &cap); > + if (!ret) { > + pci_warn(dev, "common capability not found\n"); Is the lack of this capability really an error, i.e., is this pci_warn() or pci_info()? The "device doesn't have topology description" below is only...

...gt; + void __iomem *regs, *common_regs; > + struct viommu_cap_config cap = {0}; > + struct virtio_pci_common_cfg __iomem *common_cfg; > + > + /* > + * The virtio infrastructure might not be loaded at this point. We need > + * to access the BARs ourselves. > + */ > + ret = viommu_pci_find_capability(dev, VIRTIO_PCI_CAP_COMMON_CFG, &cap); > + if (!ret) { > + pci_warn(dev, "common capability not found\n"); Is the lack of this capability really an error, i.e., is this pci_warn() or pci_info()? The "device doesn't have topology description" below is only...

...helpers list */ + virt_topo_add_endpoint(ep); + virt_topo_add_iommu(viommu); + + return 0; +err_free: + list_for_each_entry_safe(ep, next, &endpoints, list) + kfree(ep); + kfree(viommu); + return ret; +} + +#define VPCI_FIELD(field) offsetof(struct virtio_pci_cap, field) + +static inline int viommu_pci_find_capability(struct pci_dev *dev, u8 cfg_type, + struct viommu_cap_config *cap) +{ + int pos; + u8 bar; + + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); + pos > 0; + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { + u8 type; + + pci_read_config_byte(dev, pos...

...ems; > + /* The config array of length num_items follows */ > + union viommu_topo_cfg cfg[]; > +}; > + > +static LIST_HEAD(viommus); > +static DEFINE_MUTEX(viommus_lock); > + > +#define VPCI_FIELD(field) offsetof(struct virtio_pci_cap, field) > + > +static inline int viommu_pci_find_capability(struct pci_dev *dev, u8 cfg_type, > + struct viommu_cap_config *cap) > +{ > + int pos; > + u8 bar; > + > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > + pos > 0; > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > +...

...ems; > + /* The config array of length num_items follows */ > + union viommu_topo_cfg cfg[]; > +}; > + > +static LIST_HEAD(viommus); > +static DEFINE_MUTEX(viommus_lock); > + > +#define VPCI_FIELD(field) offsetof(struct virtio_pci_cap, field) > + > +static inline int viommu_pci_find_capability(struct pci_dev *dev, u8 cfg_type, > + struct viommu_cap_config *cap) > +{ > + int pos; > + u8 bar; > + > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > + pos > 0; > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > +...

...ems; > + /* The config array of length num_items follows */ > + union viommu_topo_cfg cfg[]; > +}; > + > +static LIST_HEAD(viommus); > +static DEFINE_MUTEX(viommus_lock); > + > +#define VPCI_FIELD(field) offsetof(struct virtio_pci_cap, field) > + > +static inline int viommu_pci_find_capability(struct pci_dev *dev, u8 cfg_type, > + struct viommu_cap_config *cap) > +{ > + int pos; > + u8 bar; > + > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > + pos > 0; > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > +...

...vin > + /* The config array of length num_items follows */ > + union viommu_topo_cfg cfg[]; > +}; > + > +static LIST_HEAD(viommus); > +static DEFINE_MUTEX(viommus_lock); > + > +#define VPCI_FIELD(field) offsetof(struct virtio_pci_cap, field) > + > +static inline int viommu_pci_find_capability(struct pci_dev *dev, u8 cfg_type, > + struct viommu_cap_config *cap) > +{ > + int pos; > + u8 bar; > + > + for (pos = pci_find_capability(dev, PCI_CAP_ID_VNDR); > + pos > 0; > + pos = pci_find_next_capability(dev, pos, PCI_CAP_ID_VNDR)) { > +...

Add a topology description to the virtio-iommu driver and enable x86 platforms. Since [v2] we have made some progress on adding ACPI support for virtio-iommu, which is the preferred boot method on x86. It will be a new vendor-agnostic table describing para-virtual topologies in a minimal format. However some platforms don't use either ACPI or DT for booting (for example microvm), and will

Add a topology description to the virtio-iommu driver and enable x86 platforms. Since [v2] we have made some progress on adding ACPI support for virtio-iommu, which is the preferred boot method on x86. It will be a new vendor-agnostic table describing para-virtual topologies in a minimal format. However some platforms don't use either ACPI or DT for booting (for example microvm), and will

Add topology description to the virtio-iommu driver and enable x86 platforms. Since the RFC [1] I've mostly given up on ACPI tables, since the internal discussions seem to have reached a dead end. The built-in topology description presented here isn't ideal, but it is simple to implement and doesn't impose a dependency on ACPI or device-tree, which can be beneficial to lightweight

...> > + struct viommu_cap_config cap = {0}; > > + struct virtio_pci_common_cfg __iomem *common_cfg; > > + > > + /* > > + * The virtio infrastructure might not be loaded at this point. We need > > + * to access the BARs ourselves. > > + */ > > + ret = viommu_pci_find_capability(dev, VIRTIO_PCI_CAP_COMMON_CFG, &cap); > > + if (!ret) { > > + pci_warn(dev, "common capability not found\n"); > > Is the lack of this capability really an error, i.e., is this > pci_warn() or pci_info()? The "device doesn't have topology > d...