haraldwolff/qemu-patch-raspberry4
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spapr: Add ibm,max-associativity-domains property

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Now recent kernels (i.e. since linux-stable commit a346137e9142
("powerpc/numa: Use ibm,max-associativity-domains to discover possible nodes")
support this property to mark initially memory-less NUMA nodes as "possible"
to allow further memory hot-add to them.

Advertise this property for pSeries machines to let guest kernels detect
maximum supported node configuration and benefit from kernel side change
when hot-add memory to specific, possibly empty before, NUMA node.

Signed-off-by: Serhii Popovych <spopovyc@redhat.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Serhii Popovych 2018-04-11 14:41:59 -04:00 committed by David Gibson
parent 67d7d66f27
commit da9f80fbad
1 changed files with 10 additions and 0 deletions
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10
hw/ppc/spapr.c
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@ -909,6 +909,13 @@ static void spapr_dt_rtas(sPAPRMachineState *spapr, void *fdt)
0, cpu_to_be32(SPAPR_MEMORY_BLOCK_SIZE),
cpu_to_be32(max_cpus / smp_threads),
};
uint32_t maxdomains[] = {
cpu_to_be32(4),
cpu_to_be32(0),
cpu_to_be32(0),
cpu_to_be32(0),
cpu_to_be32(nb_numa_nodes ? nb_numa_nodes - 1 : 0),
};
_FDT(rtas = fdt_add_subnode(fdt, 0, "rtas"));
@ -945,6 +952,9 @@ static void spapr_dt_rtas(sPAPRMachineState *spapr, void *fdt)
_FDT(fdt_setprop(fdt, rtas, "ibm,associativity-reference-points",
refpoints, sizeof(refpoints)));
_FDT(fdt_setprop(fdt, rtas, "ibm,max-associativity-domains",
maxdomains, sizeof(maxdomains)));
_FDT(fdt_setprop_cell(fdt, rtas, "rtas-error-log-max",
RTAS_ERROR_LOG_MAX));
_FDT(fdt_setprop_cell(fdt, rtas, "rtas-event-scan-rate",