From 1f3aba377d2a531453f018c70de2580a142c74c9 Mon Sep 17 00:00:00 2001 From: Igor Mammedov Date: Thu, 16 Jun 2016 14:23:48 +0200 Subject: [PATCH] pc: acpi: drop intermediate PCMachineState.node_cpu PCMachineState.node_cpu was used for mapping APIC ID to numa node id as CPU entries in SRAT used to be built on sparse APIC ID bitmap (up to apic_id_limit). However since commit 5803fce pc: acpi: SRAT: create only valid processor lapic entries CPU entries in SRAT aren't build using apic bitmap but using 0..maxcpus index instead which is also used for creating numa_info[x].node_cpu map. So instead of doing useless intermediate conversion from 1. node by cpu index -> node by apic id i.e. numa_info[x].node_cpu -> PCMachineState.node_cpu 2. apic id -> srat entry PMX PCMachineState.node_cpu[apic id] -> PMX value use numa_info[x].node_cpu map directly like ARM does and do 1. numa_info[x].node_cpu -> PMX value using index in range 0..maxcpus and drop not necessary PCMachineState.node_cpu and related code. That also removes the last (not counting legacy hotplug) dependency of ACPI code on apic_id_limit and need to allocate huge sparse PCMachineState.node_cpu array in case of 32-bit APIC IDs. Signed-off-by: Igor Mammedov Reviewed-by: Michael S. Tsirkin Signed-off-by: Michael S. Tsirkin --- hw/i386/acpi-build.c | 11 ++++++++--- hw/i386/pc.c | 16 +--------------- include/hw/i386/pc.h | 1 - 3 files changed, 9 insertions(+), 19 deletions(-) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 20e5b4948e..5a594be8ee 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -44,6 +44,7 @@ #include "hw/acpi/tpm.h" #include "sysemu/tpm_backend.h" #include "hw/timer/mc146818rtc_regs.h" +#include "sysemu/numa.h" /* Supported chipsets: */ #include "hw/acpi/piix4.h" @@ -2328,7 +2329,6 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine) AcpiSratMemoryAffinity *numamem; int i; - uint64_t curnode; int srat_start, numa_start, slots; uint64_t mem_len, mem_base, next_base; MachineClass *mc = MACHINE_GET_CLASS(machine); @@ -2344,14 +2344,19 @@ build_srat(GArray *table_data, BIOSLinker *linker, MachineState *machine) srat->reserved1 = cpu_to_le32(1); for (i = 0; i < apic_ids->len; i++) { + int j; int apic_id = apic_ids->cpus[i].arch_id; core = acpi_data_push(table_data, sizeof *core); core->type = ACPI_SRAT_PROCESSOR_APIC; core->length = sizeof(*core); core->local_apic_id = apic_id; - curnode = pcms->node_cpu[apic_id]; - core->proximity_lo = curnode; + for (j = 0; j < nb_numa_nodes; j++) { + if (test_bit(i, numa_info[j].node_cpu)) { + core->proximity_lo = j; + break; + } + } memset(core->proximity_hi, 0, 3); core->local_sapic_eid = 0; core->flags = cpu_to_le32(1); diff --git a/hw/i386/pc.c b/hw/i386/pc.c index dbfba5cad1..b8fead37e2 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1179,7 +1179,7 @@ void pc_machine_done(Notifier *notifier, void *data) void pc_guest_info_init(PCMachineState *pcms) { - int i, j; + int i; pcms->apic_xrupt_override = kvm_allows_irq0_override(); pcms->numa_nodes = nb_numa_nodes; @@ -1189,20 +1189,6 @@ void pc_guest_info_init(PCMachineState *pcms) pcms->node_mem[i] = numa_info[i].node_mem; } - pcms->node_cpu = g_malloc0(pcms->apic_id_limit * - sizeof *pcms->node_cpu); - - for (i = 0; i < max_cpus; i++) { - unsigned int apic_id = x86_cpu_apic_id_from_index(i); - assert(apic_id < pcms->apic_id_limit); - for (j = 0; j < nb_numa_nodes; j++) { - if (test_bit(i, numa_info[j].node_cpu)) { - pcms->node_cpu[apic_id] = j; - break; - } - } - } - pcms->machine_done.notify = pc_machine_done; qemu_add_machine_init_done_notifier(&pcms->machine_done); } diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 884224ed19..948ed0c277 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -72,7 +72,6 @@ struct PCMachineState { /* NUMA information: */ uint64_t numa_nodes; uint64_t *node_mem; - uint64_t *node_cpu; }; #define PC_MACHINE_ACPI_DEVICE_PROP "acpi-device" -- 2.11.4.GIT