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author | Keir Fraser <keir.fraser@citrix.com> | 2009-04-17 13:14:01 +0100 |
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committer | Keir Fraser <keir.fraser@citrix.com> | 2009-04-17 13:14:01 +0100 |
commit | ede78f509c7f2b79d741e450bfca7b8d4a262b94 (patch) | |
tree | bd2f12af4aa1e2123007f6ad09363c04355f0a9e /Makefile | |
parent | cebd2137ea64a8ba9cc2edc57df556224917e9bd (diff) | |
download | xen-ede78f509c7f2b79d741e450bfca7b8d4a262b94.tar.gz xen-ede78f509c7f2b79d741e450bfca7b8d4a262b94.tar.bz2 xen-ede78f509c7f2b79d741e450bfca7b8d4a262b94.zip |
cpuidle: Add support for Always Running APIC timer, CPUID_0x6_EAX_Bit2.
This bit means the APIC timer continues to run even when CPU is
in deep C-states.
The advantage is that we can use LAPIC timer on these CPUs
always, and there is no need for "slow to read and program"
external timers (HPET/PIT) and the timer broadcast logic
and related code in C-state entry and exit.
Refer to the latest Intel SDM Vol 2A
(http://www.intel.com/products/processor/manuals/index.htm)
Signed-off-by: Wei Gang <gang.wei@intel.com>
Diffstat (limited to 'Makefile')
0 files changed, 0 insertions, 0 deletions