On Thu, Nov 23, 2017 at 02:29:51PM +0100, Cédric Le Goater wrote:
> When the XIVE interrupt mode is activated, the machine needs to expose
> to the guest the MMIO regions use by the controller :
>
> - Event State Buffer (ESB)
> - Thread Interrupt Management Area (TIMA)
>
> Migration will also need to reflect the current interrupt mode in use.
>
> Signed-off-by: Cédric Le Goater <clg@kaod.org>
> ---
> hw/intc/spapr_xive_hcall.c | 14 ++++++++++++++
> hw/ppc/spapr.c | 5 +++++
> include/hw/ppc/spapr_xive.h | 1 +
> 3 files changed, 20 insertions(+)
>
> diff --git a/hw/intc/spapr_xive_hcall.c b/hw/intc/spapr_xive_hcall.c
> index 60c6c9f4be8f..ba217144878e 100644
> --- a/hw/intc/spapr_xive_hcall.c
> +++ b/hw/intc/spapr_xive_hcall.c
> @@ -933,3 +933,17 @@ void spapr_xive_populate(sPAPRMachineState *spapr, int nr_servers,
> _FDT(fdt_setprop(fdt, 0, "ibm,plat-res-int-priorities",
> plat_res_int_priorities, sizeof(plat_res_int_priorities)));
> }
> +
> +void spapr_xive_mmio_map(sPAPRMachineState *spapr)
> +{
> + sPAPRXive *xive = spapr->xive;
> +
> + /* ESBs */
> + sysbus_mmio_map(SYS_BUS_DEVICE(xive), 0, xive->esb_base);
> +
> + /* Thread Management Interrupt Areas */
> + /* TODO: Only map the OS TIMA for the moment. Mapping the whole
> + * region needs some rework in the handlers */
> + sysbus_mmio_map(SYS_BUS_DEVICE(xive), 1,
> + xive->tm_base + (1 << xive->tm_shift));
You probably shouldn't be exposing the user TIMA in the DT if you're
only allowing the OS TIME to be mapped.
> +}
> diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
> index 3a62369883cc..734706c18cb3 100644
> --- a/hw/ppc/spapr.c
> +++ b/hw/ppc/spapr.c
> @@ -1132,6 +1132,7 @@ static void *spapr_build_fdt(sPAPRMachineState *spapr,
> } else {
> /* Populate device tree for XIVE */
> spapr_xive_populate(spapr, xics_max_server_number(), fdt, PHANDLE_XICP);
> + spapr_xive_mmio_map(spapr);
This doesn't belong here, spapr_build_fdt() should _just_ build the
fdt, not have side effects on the actual device state.
> }
>
> ret = spapr_populate_memory(spapr, fdt);
> @@ -1613,6 +1614,10 @@ static int spapr_post_load(void *opaque, int version_id)
> }
> }
>
> + if (spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
> + spapr_xive_mmio_map(spapr);
> + }
> +
> return err;
> }
>
> diff --git a/include/hw/ppc/spapr_xive.h b/include/hw/ppc/spapr_xive.h
> index f6d4bf26e06a..88355f7eb643 100644
> --- a/include/hw/ppc/spapr_xive.h
> +++ b/include/hw/ppc/spapr_xive.h
> @@ -84,5 +84,6 @@ typedef struct sPAPRMachineState sPAPRMachineState;
> void spapr_xive_hcall_init(sPAPRMachineState *spapr);
> void spapr_xive_populate(sPAPRMachineState *spapr, int nr_servers, void *fdt,
> uint32_t phandle);
> +void spapr_xive_mmio_map(sPAPRMachineState *spapr);
>
> #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