Re: [PATCH] x86/tsc: Unset TSC_KNOWN_FREQ and TSC_RELIABLE flags on Intel Bay Trail SoC

On Wed, Dec 18, 2019 at 09:00:39PM +0530, Vipul Kumar wrote:

From: Vipul Kumar vipul_kumar@mentor.com

'commit f3a02ecebed7 ("x86/tsc: Set TSC_KNOWN_FREQ and TSC_RELIABLE flags on Intel Atom SoCs")', causing time drift for Bay trail SoC. These flags are set for SoCs having cpuid_level 0x15 or more. Bay trail is having cpuid_level 0xb.

So, unset both flags to make sure the clocksource calibration can be done.

Signed-off-by: Vipul Kumar vipul_kumar@mentor.com

arch/x86/kernel/tsc_msr.c | 3 +++ 1 file changed, 3 insertions(+)

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This is not the correct way to submit patches for inclusion in the stable kernel tree. Please read: https://www.kernel.org/doc/html/latest/process/stable-kernel-rules.html for how to do this properly.

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