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| author | Keir Fraser <keir@xen.org> | 2011-04-15 08:52:08 +0100 |
|---|---|---|
| committer | Keir Fraser <keir@xen.org> | 2011-04-15 08:52:08 +0100 |
| commit | 8d24303023ec82d94f97154785302d52e9917f91 (patch) | |
| tree | e28fc5abc76a74469c7258d6efe7f724ad951449 /xen/include/xen/cpuidle.h | |
| parent | 486fa85e92c675a03e9bc482e02d7af2d00dc81e (diff) | |
| download | xen-8d24303023ec82d94f97154785302d52e9917f91.tar.gz xen-8d24303023ec82d94f97154785302d52e9917f91.tar.bz2 xen-8d24303023ec82d94f97154785302d52e9917f91.zip | |
x86: don't write_tsc() non-zero values on CPUs updating only the lower 32 bits
This means suppressing the uses in time_calibration_tsc_rendezvous(),
cstate_restore_tsc(), and synchronize_tsc_slave(), and fixes a boot
hang of Linux Dom0 when loading processor.ko on such systems that
have support for C states above C1.
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Signed-off-by: Keir Fraser <keir@xen.org>
Diffstat (limited to 'xen/include/xen/cpuidle.h')
| -rw-r--r-- | xen/include/xen/cpuidle.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/xen/include/xen/cpuidle.h b/xen/include/xen/cpuidle.h index cf73341bf5..bbdadb4ac4 100644 --- a/xen/include/xen/cpuidle.h +++ b/xen/include/xen/cpuidle.h @@ -85,7 +85,10 @@ struct cpuidle_governor void (*reflect) (struct acpi_processor_power *dev); }; +extern s8 xen_cpuidle; extern struct cpuidle_governor *cpuidle_current_governor; + +bool_t cpuidle_using_deep_cstate(void); void cpuidle_disable_deep_cstate(void); extern void cpuidle_wakeup_mwait(cpumask_t *mask); |