This changes FW_CFG_MAX_CPUS and FW_CFG_NUMA to use apic_id_for_cpu(),
so the NUMA table can be based on the APIC IDs, instead of CPU index
(SeaBIOS knows nothing about CPU indexes, just APIC IDs).
Signed-off-by: Eduardo Habkost <ehabk...@redhat.com>
---
hw/pc.c | 23 ++++++++++++++++-------
target-i386/cpu.h | 7 +++++++
2 files changed, 23 insertions(+), 7 deletions(-)
diff --git a/hw/pc.c b/hw/pc.c
index 10449bd..9afb838 100644
--- a/hw/pc.c
+++ b/hw/pc.c
@@ -581,6 +581,11 @@ int e820_add_entry(uint64_t address, uint64_t length,
uint32_t type)
return index;
}
+unsigned int apic_id_limit(void)
+{
+ return apic_id_for_cpu(max_cpus - 1) + 1;
+}
+
static void *bochs_bios_init(void)
{
void *fw_cfg;
@@ -588,6 +593,7 @@ static void *bochs_bios_init(void)
size_t smbios_len;
uint64_t *numa_fw_cfg;
int i, j;
+ unsigned int max_apic_id = apic_id_limit();
register_ioport_write(0x400, 1, 2, bochs_bios_write, NULL);
register_ioport_write(0x401, 1, 2, bochs_bios_write, NULL);
@@ -602,7 +608,7 @@ static void *bochs_bios_init(void)
register_ioport_write(0x503, 1, 1, bochs_bios_write, NULL);
fw_cfg = fw_cfg_init(BIOS_CFG_IOPORT, BIOS_CFG_IOPORT + 1, 0, 0);
- fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_cpus);
+ fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_apic_id);
fw_cfg_add_i32(fw_cfg, FW_CFG_ID, 1);
fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);
fw_cfg_add_bytes(fw_cfg, FW_CFG_ACPI_TABLES, (uint8_t *)acpi_tables,
@@ -622,21 +628,24 @@ static void *bochs_bios_init(void)
* of nodes, one word for each VCPU->node and one word for each node to
* hold the amount of memory.
*/
- numa_fw_cfg = g_malloc0((1 + max_cpus + nb_numa_nodes) * 8);
+ numa_fw_cfg = g_malloc0((1 + max_apic_id + nb_numa_nodes) * 8);
numa_fw_cfg[0] = cpu_to_le64(nb_numa_nodes);
- for (i = 0; i < max_cpus; i++) {
+ unsigned int cpu_idx;
+ for (cpu_idx = 0; cpu_idx < max_cpus; cpu_idx++) {
+ unsigned int apic_id = apic_id_for_cpu(cpu_idx);
+ assert(apic_id < max_apic_id);
for (j = 0; j < nb_numa_nodes; j++) {
- if (test_bit(i, node_cpumask[j])) {
- numa_fw_cfg[i + 1] = cpu_to_le64(j);
+ if (test_bit(cpu_idx, node_cpumask[j])) {
+ numa_fw_cfg[apic_id + 1] = cpu_to_le64(j);
break;
}
}
}
for (i = 0; i < nb_numa_nodes; i++) {
- numa_fw_cfg[max_cpus + 1 + i] = cpu_to_le64(node_mem[i]);
+ numa_fw_cfg[max_apic_id + 1 + i] = cpu_to_le64(node_mem[i]);
}
fw_cfg_add_bytes(fw_cfg, FW_CFG_NUMA, (uint8_t *)numa_fw_cfg,
- (1 + max_cpus + nb_numa_nodes) * 8);
+ (1 + max_apic_id + nb_numa_nodes) * 8);
return fw_cfg;
}
diff --git a/target-i386/cpu.h b/target-i386/cpu.h
index 39ea005..257d6c7 100644
--- a/target-i386/cpu.h
+++ b/target-i386/cpu.h
@@ -919,6 +919,13 @@ void host_cpuid(uint32_t function, uint32_t count,
*/
unsigned int apic_id_for_cpu(int cpu_index);
+/* Calculate limit for the APIC ID value, based on max_cpus
+ *
+ * On PC, FW_CFG_MAX_CPUS is not max_cpus, but the limit for the APIC IDs
+ * of all CPUs (so that of all CPUs APIC ID < MAX_CPUS).
+ */
+unsigned int apic_id_limit(void);
+
/* helper.c */
int cpu_x86_handle_mmu_fault(CPUX86State *env, target_ulong addr,
--
1.7.11.2
