On Mon, Sep 11, 2017 at 07:12:32PM +0200, Cédric Le Goater wrote:
> Like for XICS, the XIVE interface for the guest is described in the
> device tree under the "interrupt-controller" node. A couple of new
> properties are specific to XIVE :
>
> - "reg"
>
> contains the base address and size of the thread interrupt
> managnement areas (TIMA), also called rings, for the User level and
> for the Guest OS level. Only the Guest OS level is taken into
> account today.
>
> - "ibm,xive-eq-sizes"
>
> the size of the event queues. One cell per size supported, contains
> log2 of size, in ascending order.
>
> - "ibm,xive-lisn-ranges"
>
> the interrupt numbers ranges assigned to the guest. These are
> allocated using a simple bitmap.
>
> and also under the root node :
>
> - "ibm,plat-res-int-priorities"
>
> contains a list of priorities that the hypervisor has reserved for
> its own use. Simulate ranges as defined by the PowerVM Hypervisor.
>
> Signed-off-by: Cédric Le Goater <c...@kaod.org>
> ---
> hw/intc/spapr_xive_hcall.c | 54
> +++++++++++++++++++++++++++++++++++++++++++++
> include/hw/ppc/spapr_xive.h | 1 +
> 2 files changed, 55 insertions(+)
>
> diff --git a/hw/intc/spapr_xive_hcall.c b/hw/intc/spapr_xive_hcall.c
> index 4c77b65683de..7b19ea6373dd 100644
> --- a/hw/intc/spapr_xive_hcall.c
> +++ b/hw/intc/spapr_xive_hcall.c
> @@ -874,3 +874,57 @@ void spapr_xive_hcall_init(sPAPRMachineState *spapr)
> spapr_register_hypercall(H_INT_SYNC, h_int_sync);
> spapr_register_hypercall(H_INT_RESET, h_int_reset);
> }
> +
> +void spapr_xive_populate(sPAPRXive *xive, void *fdt, uint32_t phandle)
> +{
> + int node;
> + uint64_t timas[2 * 2];
> + uint32_t lisn_ranges[] = {
> + cpu_to_be32(xive->nr_irqs - xive->nr_targets + xive->ics->offset),
> + cpu_to_be32(xive->nr_targets),
> + };
> + uint32_t eq_sizes[] = {
> + cpu_to_be32(12), /* 4K */
> + cpu_to_be32(16), /* 64K */
> + cpu_to_be32(21), /* 2M */
> + cpu_to_be32(24), /* 16M */
> + };
> +
> + /* Use some ranges to exercise the Linux driver, which should
> + * result in Linux choosing priority 6. This is not strictly
> + * necessary
> + */
> + uint32_t reserved_priorities[] = {
> + cpu_to_be32(1), /* start */
> + cpu_to_be32(2), /* count */
> + cpu_to_be32(7), /* start */
> + cpu_to_be32(0xf8), /* count */
> + };
> + int i;
> +
> + /* Thread Interrupt Management Areas : User and OS */
> + for (i = 0; i < 2; i++) {
> + timas[i * 2] = cpu_to_be64(xive->tm_base + i * (1 <<
> xive->tm_shift));
> + timas[i * 2 + 1] = cpu_to_be64(1 << xive->tm_shift);
> + }
> +
> + _FDT(node = fdt_add_subnode(fdt, 0, "interrupt-controller"));
> +
> + _FDT(fdt_setprop_string(fdt, node, "name", "interrupt-controller"));
Shouldn't need this - SLOF will figure it out from the node name above.
> + _FDT(fdt_setprop_string(fdt, node, "device_type", "power-ivpe"));
> + _FDT(fdt_setprop(fdt, node, "reg", timas, sizeof(timas)));
> +
> + _FDT(fdt_setprop_string(fdt, node, "compatible", "ibm,power-ivpe"));
> + _FDT(fdt_setprop(fdt, node, "ibm,xive-eq-sizes", eq_sizes,
> + sizeof(eq_sizes)));
> + _FDT(fdt_setprop(fdt, node, "ibm,xive-lisn-ranges", lisn_ranges,
> + sizeof(lisn_ranges)));
I note this doesn't have the interrupt-controller or #interrupt-cells
properties. So what acts as the interrupt parent for all the devices
in the tree with XIVE?
> + /* For SLOF */
> + _FDT(fdt_setprop_cell(fdt, node, "linux,phandle", phandle));
> + _FDT(fdt_setprop_cell(fdt, node, "phandle", phandle));
> +
> + /* top properties */
> + _FDT(fdt_setprop(fdt, 0, "ibm,plat-res-int-priorities",
> + reserved_priorities, sizeof(reserved_priorities)));
> +}
> diff --git a/include/hw/ppc/spapr_xive.h b/include/hw/ppc/spapr_xive.h
> index ae5ff89533c0..0a156f2d8591 100644
> --- a/include/hw/ppc/spapr_xive.h
> +++ b/include/hw/ppc/spapr_xive.h
> @@ -69,5 +69,6 @@ struct sPAPRXive {
> typedef struct sPAPRMachineState sPAPRMachineState;
>
> void spapr_xive_hcall_init(sPAPRMachineState *spapr);
> +void spapr_xive_populate(sPAPRXive *xive, void *fdt, uint32_t phandle);
>
> #endif /* PPC_SPAPR_XIVE_H */
--
David Gibson | I'll have my music baroque, and my code
david AT gibson.dropbear.id.au | minimalist, thank you. NOT _the_ _other_
| _way_ _around_!
http://www.ozlabs.org/~dgibson
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