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 <imammedo@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

1 files changed, 8 insertions, 3 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);