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authorIgor Mammedov <imammedo@redhat.com>2016-10-20 16:58:42 +0200
committerEduardo Habkost <ehabkost@redhat.com>2016-10-24 17:29:15 -0200
commit080ac219cc7d9c55adf925c3545b7450055ad625 (patch)
tree851d8c7b19b6b9c0e5fe2049603eb54ededc2fe4 /include/hw/i386/pc.h
parent079019f2e319bd1279681b6c1d7dde785d09e69e (diff)
pc: Add 'etc/boot-cpus' fw_cfg file for machine with more than 255 CPUs
Currently firmware uses 1 byte at 0x5F offset in RTC CMOS to get number of CPUs present at boot. However 1 byte is not enough to handle more than 255 CPUs. So add a new fw_cfg file that would allow QEMU to tell it. For compat reasons add file only for machine types that support more than 255 CPUs. Signed-off-by: Igor Mammedov <imammedo@redhat.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'include/hw/i386/pc.h')
-rw-r--r--include/hw/i386/pc.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index b16c448249..17fff80c8a 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -37,6 +37,7 @@
/**
* PCMachineState:
* @acpi_dev: link to ACPI PM device that performs ACPI hotplug handling
+ * @boot_cpus_le: number of present VCPUs, referenced by 'etc/boot-cpus' fw_cfg
*/
struct PCMachineState {
/*< private >*/
@@ -69,6 +70,7 @@ struct PCMachineState {
bool apic_xrupt_override;
unsigned apic_id_limit;
CPUArchIdList *possible_cpus;
+ uint16_t boot_cpus_le;
/* NUMA information: */
uint64_t numa_nodes;