diff options
| author | Haozhong Zhang <haozhong.zhang@intel.com> | 2015-11-24 11:33:57 +0800 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2016-01-21 12:47:16 -0200 |
| commit | 36f96c4b6bd25f43000c317518ff3df10202bc75 (patch) | |
| tree | 9d06b5464aa50dfd100e69f20a61f47cb32e774d /include/hw | |
| parent | 5031283d5296dac8d410fa7b01fb6799ccfc76e9 (diff) | |
target-i386: Add support to migrate vcpu's TSC rate
This patch enables migrating vcpu's TSC rate. If KVM on the
destination machine supports TSC scaling, guest programs will
observe a consistent TSC rate across the migration.
If TSC scaling is not supported on the destination machine, the
migration will not be aborted and QEMU on the destination will
not set vcpu's TSC rate to the migrated value.
If vcpu's TSC rate specified by CPU option 'tsc-freq' on the
destination machine is inconsistent with the migrated TSC rate,
the migration will be aborted.
For backwards compatibility, the migration of vcpu's TSC rate is
disabled on pc-*-2.5 and older machine types.
Signed-off-by: Haozhong Zhang <haozhong.zhang@intel.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
[ehabkost: Rewrote comment at kvm_arch_put_registers()]
[ehabkost: Moved compat code to pc-2.5]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'include/hw')
| -rw-r--r-- | include/hw/i386/pc.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 588a33cfa3..5bac03d975 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -120,6 +120,9 @@ struct PCMachineClass { bool has_reserved_memory; bool enforce_aligned_dimm; bool broken_reserved_end; + + /* TSC rate migration: */ + bool save_tsc_khz; }; #define TYPE_PC_MACHINE "generic-pc-machine" |