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| author | Dilip Kota <eswara.kota@linux.intel.com> | 2020-08-03 10:56:36 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2020-08-07 02:32:00 +0300 |
| commit | 7d98585860d845e36ee612832a5ff021f201dbaf (patch) | |
| tree | 33421d21d150297e1129fc18a618f5db819e6cc5 /arch/x86 | |
| parent | 475f63ae63b5102ae6423d1712333929d04d6ecc (diff) | |
| download | linux-7d98585860d845e36ee612832a5ff021f201dbaf.tar.xz | |
x86/tsr: Fix tsc frequency enumeration bug on Lightning Mountain SoC
Frequency descriptor of Lightning Mountain SoC doesn't have all the
frequency entries so resulting in the below failure causing a kernel hang:
Error MSR_FSB_FREQ index 15 is unknown
tsc: Fast TSC calibration failed
So, add all the frequency entries in the Lightning Mountain SoC frequency
descriptor.
Fixes: 0cc5359d8fd45 ("x86/cpu: Update init data for new Airmont CPU model")
Fixes: 812c2d7506fd ("x86/tsc_msr: Use named struct initializers")
Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/211c643ae217604b46cbec43a2c0423946dc7d2d.1596440057.git.eswara.kota@linux.intel.com
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kernel/tsc_msr.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c index 4fec6f3a1858..a654a9b4b77c 100644 --- a/arch/x86/kernel/tsc_msr.c +++ b/arch/x86/kernel/tsc_msr.c @@ -133,10 +133,15 @@ static const struct freq_desc freq_desc_ann = { .mask = 0x0f, }; -/* 24 MHz crystal? : 24 * 13 / 4 = 78 MHz */ +/* + * 24 MHz crystal? : 24 * 13 / 4 = 78 MHz + * Frequency step for Lightning Mountain SoC is fixed to 78 MHz, + * so all the frequency entries are 78000. + */ static const struct freq_desc freq_desc_lgm = { .use_msr_plat = true, - .freqs = { 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000 }, + .freqs = { 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000, + 78000, 78000, 78000, 78000, 78000, 78000, 78000, 78000 }, .mask = 0x0f, }; |