From: Dilip Kota eswara.kota@linux.intel.com
[ Upstream commit 7d98585860d845e36ee612832a5ff021f201dbaf ]
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.159644005... Signed-off-by: Sasha Levin sashal@kernel.org --- arch/x86/kernel/tsc_msr.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/tsc_msr.c b/arch/x86/kernel/tsc_msr.c index c65adaf813848..41200706e6da1 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, };