5dab5abe62
FORM2 NUMA affinity is prepared to deal with empty (memory/cpu less) NUMA nodes. This is used by the DAX KMEM driver to locate a PAPR SCM device that has a different latency than the original NUMA node from the regular memory. FORM2 is also able to deal with asymmetric NUMA distances gracefully, something that our FORM1 implementation doesn't do. Move these FORM1 verifications to a new function and wait until after CAS, when we're sure that we're sticking with FORM1, to enforce them. Reviewed-by: Greg Kurz <groug@kaod.org> Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com> Message-Id: <20210920174947.556324-6-danielhb413@gmail.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
38 lines
1.4 KiB
C
38 lines
1.4 KiB
C
/*
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* QEMU PowerPC pSeries Logical Partition NUMA associativity handling
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*
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* Copyright IBM Corp. 2020
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*
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* Authors:
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* Daniel Henrique Barboza <danielhb413@gmail.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef HW_SPAPR_NUMA_H
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#define HW_SPAPR_NUMA_H
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#include "hw/boards.h"
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#include "hw/ppc/spapr.h"
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/*
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* Having both SpaprMachineState and MachineState as arguments
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* feels odd, but it will spare a MACHINE() call inside the
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* function. spapr_machine_init() is the only caller for it, and
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* it has both pointers resolved already.
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*/
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void spapr_numa_associativity_init(SpaprMachineState *spapr,
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MachineState *machine);
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void spapr_numa_associativity_check(SpaprMachineState *spapr);
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void spapr_numa_write_rtas_dt(SpaprMachineState *spapr, void *fdt, int rtas);
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void spapr_numa_write_associativity_dt(SpaprMachineState *spapr, void *fdt,
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int offset, int nodeid);
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int spapr_numa_fixup_cpu_dt(SpaprMachineState *spapr, void *fdt,
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int offset, PowerPCCPU *cpu);
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int spapr_numa_write_assoc_lookup_arrays(SpaprMachineState *spapr, void *fdt,
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int offset);
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unsigned int spapr_numa_initial_nvgpu_numa_id(MachineState *machine);
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#endif /* HW_SPAPR_NUMA_H */
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