On Tue, 2014-06-10 at 12:03 +1000, Gavin Shan wrote:
> The patch implements sPAPRPHBClass::eeh_handler so that the
> EEH RTAS requests can be routed to VFIO for further handling.
>
> Signed-off-by: Gavin Shan <gws...@linux.vnet.ibm.com>
> ---
> hw/ppc/spapr_pci_vfio.c | 56
> +++++++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 56 insertions(+)
>
> diff --git a/hw/ppc/spapr_pci_vfio.c b/hw/ppc/spapr_pci_vfio.c
> index 592d6a4..9750cf0 100644
> --- a/hw/ppc/spapr_pci_vfio.c
> +++ b/hw/ppc/spapr_pci_vfio.c
> @@ -85,6 +85,61 @@ static void spapr_phb_vfio_finish_realize(sPAPRPHBState
> *sphb, Error **errp)
> spapr_tce_get_iommu(tcet));
> }
>
> +static int spapr_phb_vfio_eeh_handler(sPAPRPHBState *sphb, int req, int opt)
> +{
> + sPAPRPHBVFIOState *svphb = SPAPR_PCI_VFIO_HOST_BRIDGE(sphb);
> + struct vfio_eeh_pe_op op = { .argsz = sizeof(op), .flags = 0 };
FWIW, flags = 0 isn't actually necessary. I'm sure someone here can
quote the C spec, but it's my understanding that if any field of a
structure is initialized, the remaining fields are zero initialized.
vfio.c has a mix of initializations depending on whether using an
explicit value for flags adds to the code clarity.
> + int cmd;
> +
> + switch (req) {
> + case RTAS_EEH_REQ_SET_OPTION:
> + switch (opt) {
> + case RTAS_EEH_DISABLE:
> + cmd = VFIO_EEH_PE_DISABLE;
> + break;
> + case RTAS_EEH_ENABLE:
> + cmd = VFIO_EEH_PE_ENABLE;
> + break;
> + case RTAS_EEH_THAW_IO:
> + cmd = VFIO_EEH_PE_UNFREEZE_IO;
> + break;
> + case RTAS_EEH_THAW_DMA:
> + cmd = VFIO_EEH_PE_UNFREEZE_DMA;
> + break;
> + default:
> + return -EINVAL;
> + }
> + break;
> + case RTAS_EEH_REQ_GET_STATE:
> + cmd = VFIO_EEH_PE_GET_STATE;
> + break;
> + case RTAS_EEH_REQ_RESET:
> + switch (opt) {
> + case RTAS_SLOT_RESET_DEACTIVATE:
> + cmd = VFIO_EEH_PE_RESET_DEACTIVATE;
> + break;
> + case RTAS_SLOT_RESET_HOT:
> + cmd = VFIO_EEH_PE_RESET_HOT;
> + break;
> + case RTAS_SLOT_RESET_FUNDAMENTAL:
> + cmd = VFIO_EEH_PE_RESET_FUNDAMENTAL;
> + break;
> + default:
> + return -EINVAL;
> + }
> + break;
> + case RTAS_EEH_REQ_CONFIGURE:
> + cmd = VFIO_EEH_PE_CONFIGURE;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + op.op = cmd;
> + return vfio_container_ioctl(&svphb->phb.iommu_as, svphb->iommugroupid,
> + VFIO_EEH_PE_OP, &op);
> +}
> +
> static void spapr_phb_vfio_reset(DeviceState *qdev)
> {
> /* Do nothing */
> @@ -98,6 +153,7 @@ static void spapr_phb_vfio_class_init(ObjectClass *klass,
> void *data)
> dc->props = spapr_phb_vfio_properties;
> dc->reset = spapr_phb_vfio_reset;
> spc->finish_realize = spapr_phb_vfio_finish_realize;
> + spc->eeh_handler = spapr_phb_vfio_eeh_handler;
> }
>
> static const TypeInfo spapr_phb_vfio_info = {
