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spapr_numa.c: create spapr_numa_initial_nvgpu_numa_id() helper 

We'll need to check the initial value given to spapr->gpu_numa_id when
building the rtas DT, so put it in a helper for easier access and to
avoid repetition.

Tested-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Greg Kurz <groug@kaod.org>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
Message-Id: <20210128174213.1349181-3-danielhb413@gmail.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Daniel Henrique Barboza 2021-01-28 14:42:12 -03:00 committed by David Gibson
parent 3b880445e6
commit 6640706972
3 changed files with 16 additions and 10 deletions
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11
hw/ppc/spapr.c
View File

@ -2770,16 +2770,7 @@ static void spapr_machine_init(MachineState *machine)
}
/*
* NVLink2-connected GPU RAM needs to be placed on a separate NUMA node.
* We assign a new numa ID per GPU in spapr_pci_collect_nvgpu() which is
* called from vPHB reset handler so we initialize the counter here.
* If no NUMA is configured from the QEMU side, we start from 1 as GPU RAM
* must be equally distant from any other node.
* The final value of spapr->gpu_numa_id is going to be written to
* max-associativity-domains in spapr_build_fdt().
*/
spapr->gpu_numa_id = MAX(1, machine->numa_state->num_nodes);
spapr->gpu_numa_id = spapr_numa_initial_nvgpu_numa_id(machine);
/* Init numa_assoc_array */
spapr_numa_associativity_init(spapr, machine);

14
hw/ppc/spapr_numa.c
View File

@ -46,6 +46,20 @@ static bool spapr_numa_is_symmetrical(MachineState *ms)
return true;
}
/*
* NVLink2-connected GPU RAM needs to be placed on a separate NUMA node.
* We assign a new numa ID per GPU in spapr_pci_collect_nvgpu() which is
* called from vPHB reset handler so we initialize the counter here.
* If no NUMA is configured from the QEMU side, we start from 1 as GPU RAM
* must be equally distant from any other node.
* The final value of spapr->gpu_numa_id is going to be written to
* max-associativity-domains in spapr_build_fdt().
*/
unsigned int spapr_numa_initial_nvgpu_numa_id(MachineState *machine)
{
return MAX(1, machine->numa_state->num_nodes);
}
/*
* This function will translate the user distances into
* what the kernel understand as possible values: 10

1
include/hw/ppc/spapr_numa.h
View File

@ -31,5 +31,6 @@ int spapr_numa_fixup_cpu_dt(SpaprMachineState *spapr, void *fdt,
int offset, PowerPCCPU *cpu);
int spapr_numa_write_assoc_lookup_arrays(SpaprMachineState *spapr, void *fdt,
int offset);
unsigned int spapr_numa_initial_nvgpu_numa_id(MachineState *machine);
#endif /* HW_SPAPR_NUMA_H */