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| 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 /target-i386/cpu.h | |
| parent | 5031283d5296dac8d410fa7b01fb6799ccfc76e9 (diff) | |
| download | qemu-36f96c4b6bd25f43000c317518ff3df10202bc75.zip qemu-36f96c4b6bd25f43000c317518ff3df10202bc75.tar.gz qemu-36f96c4b6bd25f43000c317518ff3df10202bc75.tar.bz2 | |
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 'target-i386/cpu.h')
| -rw-r--r-- | target-i386/cpu.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/target-i386/cpu.h b/target-i386/cpu.h index 77e62b2..28cbaf5 100644 --- a/target-i386/cpu.h +++ b/target-i386/cpu.h @@ -978,6 +978,7 @@ typedef struct CPUX86State { uint32_t sipi_vector; bool tsc_valid; int64_t tsc_khz; + int64_t user_tsc_khz; /* for sanity check only */ void *kvm_xsave_buf; uint64_t mcg_cap; |