diff options
| author | Len Brown <len.brown@intel.com> | 2017-01-13 01:11:18 -0500 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-01-14 09:30:37 +0100 |
| commit | 695085b4bc7603551db0b3da897b8bf9893ca218 (patch) | |
| tree | 53f371f8f222c1cc8ee328115a112cadd9541aaa /tools/testing | |
| parent | ff3f7e2475bbf9201e95824e72698fcdc5c3d47a (diff) | |
x86/tsc: Add the Intel Denverton Processor to native_calibrate_tsc()
The Intel Denverton microserver uses a 25 MHz TSC crystal,
so we can derive its exact [*] TSC frequency
using CPUID and some arithmetic, eg.:
TSC: 1800 MHz (25000000 Hz * 216 / 3 / 1000000)
[*] 'exact' is only as good as the crystal, which should be +/- 20ppm
Signed-off-by: Len Brown <len.brown@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/306899f94804aece6d8fa8b4223ede3b48dbb59c.1484287748.git.len.brown@intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'tools/testing')
0 files changed, 0 insertions, 0 deletions