[Qemu-devel] [PATCH v3 2/2] x86: Increase max vcpu number to 8192

[Lan Tianyu <tianyu.lan@intel.com>]

For HPC usage case, it will create a huge VM with vcpus number as same as host
cpus and this requires more vcpus support in a single VM. This patch is to
increase max vcpu number from 288 to 8192 which is current default maximum cpu
number for Linux kernel.

Signed-off-by: Lan Tianyu <tianyu.lan@intel.com>
---
 hw/i386/pc_q35.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index b469d05..3468f5a 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -299,7 +299,7 @@ static void pc_q35_machine_options(MachineClass *m)
     m->default_display = "std";
     m->no_floppy = 1;
     m->has_dynamic_sysbus = true;
-    m->max_cpus = 288;
+    m->max_cpus = 8192;
 }
 
 static void pc_q35_2_11_machine_options(MachineClass *m)
@@ -314,6 +314,7 @@ static void pc_q35_2_10_machine_options(MachineClass *m)
 {
     pc_q35_2_11_machine_options(m);
     m->alias = NULL;
+    m->max_cpus = 288;
     m->numa_auto_assign_ram = numa_legacy_auto_assign_ram;
     SET_MACHINE_COMPAT(m, PC_COMPAT_2_10);
 }
-- 
1.8.3.1