51 lines
1.4 KiB
C
51 lines
1.4 KiB
C
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/*
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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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#include "qemu/osdep.h"
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#include "qemu-common.h"
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#include "hw/ppc/spapr_numa.h"
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#include "hw/ppc/fdt.h"
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/*
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* Helper that writes ibm,associativity-reference-points and
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* max-associativity-domains in the RTAS pointed by @rtas
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* in the DT @fdt.
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*/
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void spapr_numa_write_rtas_dt(SpaprMachineState *spapr, void *fdt, int rtas)
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{
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SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
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uint32_t refpoints[] = {
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cpu_to_be32(0x4),
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cpu_to_be32(0x4),
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cpu_to_be32(0x2),
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};
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uint32_t nr_refpoints = ARRAY_SIZE(refpoints);
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uint32_t maxdomain = cpu_to_be32(spapr->gpu_numa_id > 1 ? 1 : 0);
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uint32_t maxdomains[] = {
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cpu_to_be32(4),
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maxdomain,
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maxdomain,
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maxdomain,
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cpu_to_be32(spapr->gpu_numa_id),
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};
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if (smc->pre_5_1_assoc_refpoints) {
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nr_refpoints = 2;
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}
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_FDT(fdt_setprop(fdt, rtas, "ibm,associativity-reference-points",
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refpoints, nr_refpoints * sizeof(refpoints[0])));
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_FDT(fdt_setprop(fdt, rtas, "ibm,max-associativity-domains",
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maxdomains, sizeof(maxdomains)));
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}
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