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From 7dbee79b31930ae0eab366f807ea2b6ff506fc1a Mon Sep 17 00:00:00 2001
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From: Serhii Popovych <spopovyc@redhat.com>
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Date: Wed, 11 Jul 2018 17:11:44 +0100
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Subject: [PATCH 1/4] spapr: Add ibm, max-associativity-domains property
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RH-Author: Serhii Popovych <spopovyc@redhat.com>
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Message-id: <1531329105-80927-2-git-send-email-spopovyc@redhat.com>
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Patchwork-id: 81311
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O-Subject: [RHEL-8.0 qemu-kvm PATCH 1/2] spapr: Add ibm, max-associativity-domains property
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Bugzilla: 1599593
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RH-Acked-by: Laurent Vivier <lvivier@redhat.com>
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RH-Acked-by: David Gibson <dgibson@redhat.com>
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RH-Acked-by: Thomas Huth <thuth@redhat.com>
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Now recent kernels (i.e. since linux-stable commit a346137e9142
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("powerpc/numa: Use ibm,max-associativity-domains to discover possible nodes")
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support this property to mark initially memory-less NUMA nodes as "possible"
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to allow further memory hot-add to them.
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Advertise this property for pSeries machines to let guest kernels detect
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maximum supported node configuration and benefit from kernel side change
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when hot-add memory to specific, possibly empty before, NUMA node.
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Signed-off-by: Serhii Popovych <spopovyc@redhat.com>
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Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
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(cherry picked from commit da9f80fbad21319194e73355dea8a1cff6a574e4)
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Signed-off-by: Serhii Popovych <spopovyc@redhat.com>
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Signed-off-by: Danilo C. L. de Paula <ddepaula@redhat.com>
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---
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hw/ppc/spapr.c | 10 ++++++++++
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1 file changed, 10 insertions(+)
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diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
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index c3f08b3..f3da93f 100644
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--- a/hw/ppc/spapr.c
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+++ b/hw/ppc/spapr.c
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@@ -910,6 +910,13 @@ static void spapr_dt_rtas(sPAPRMachineState *spapr, void *fdt)
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0, cpu_to_be32(SPAPR_MEMORY_BLOCK_SIZE),
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cpu_to_be32(max_cpus / smp_threads),
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};
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+ uint32_t maxdomains[] = {
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+ cpu_to_be32(4),
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+ cpu_to_be32(0),
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+ cpu_to_be32(0),
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+ cpu_to_be32(0),
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+ cpu_to_be32(nb_numa_nodes ? nb_numa_nodes - 1 : 0),
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+ };
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_FDT(rtas = fdt_add_subnode(fdt, 0, "rtas"));
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@@ -946,6 +953,9 @@ static void spapr_dt_rtas(sPAPRMachineState *spapr, void *fdt)
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_FDT(fdt_setprop(fdt, rtas, "ibm,associativity-reference-points",
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refpoints, sizeof(refpoints)));
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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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_FDT(fdt_setprop_cell(fdt, rtas, "rtas-error-log-max",
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RTAS_ERROR_LOG_MAX));
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_FDT(fdt_setprop_cell(fdt, rtas, "rtas-event-scan-rate",
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--
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1.8.3.1
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