From 7dbee79b31930ae0eab366f807ea2b6ff506fc1a Mon Sep 17 00:00:00 2001 From: Serhii Popovych Date: Wed, 11 Jul 2018 17:11:44 +0100 Subject: [PATCH 1/4] spapr: Add ibm, max-associativity-domains property RH-Author: Serhii Popovych Message-id: <1531329105-80927-2-git-send-email-spopovyc@redhat.com> Patchwork-id: 81311 O-Subject: [RHEL-8.0 qemu-kvm PATCH 1/2] spapr: Add ibm, max-associativity-domains property Bugzilla: 1599593 RH-Acked-by: Laurent Vivier RH-Acked-by: David Gibson RH-Acked-by: Thomas Huth 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 Signed-off-by: David Gibson (cherry picked from commit da9f80fbad21319194e73355dea8a1cff6a574e4) Signed-off-by: Serhii Popovych Signed-off-by: Danilo C. L. de Paula --- hw/ppc/spapr.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index c3f08b3..f3da93f 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -910,6 +910,13 @@ 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")); @@ -946,6 +953,9 @@ 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", -- 1.8.3.1