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/*
* QEMU PowerPC pSeries Logical Partition NUMA associativity handling
*
* Copyright IBM Corp. 2020
*
* Authors:
* Daniel Henrique Barboza <danielhb413@gmail.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu-common.h"
#include "hw/ppc/spapr_numa.h"
#include "hw/ppc/fdt.h"
/*
* Helper that writes ibm,associativity-reference-points and
* max-associativity-domains in the RTAS pointed by @rtas
* in the DT @fdt.
*/
void spapr_numa_write_rtas_dt(SpaprMachineState *spapr, void *fdt, int rtas)
{
SpaprMachineClass *smc = SPAPR_MACHINE_GET_CLASS(spapr);
uint32_t refpoints[] = {
cpu_to_be32(0x4),
cpu_to_be32(0x4),
cpu_to_be32(0x2),
};
uint32_t nr_refpoints = ARRAY_SIZE(refpoints);
uint32_t maxdomain = cpu_to_be32(spapr->gpu_numa_id > 1 ? 1 : 0);
uint32_t maxdomains[] = {
cpu_to_be32(4),
maxdomain,
maxdomain,
maxdomain,
cpu_to_be32(spapr->gpu_numa_id),
};
if (smc->pre_5_1_assoc_refpoints) {
nr_refpoints = 2;
}
_FDT(fdt_setprop(fdt, rtas, "ibm,associativity-reference-points",
refpoints, nr_refpoints * sizeof(refpoints[0])));
_FDT(fdt_setprop(fdt, rtas, "ibm,max-associativity-domains",
maxdomains, sizeof(maxdomains)));
}
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