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SubjectRe: [PATCH 4/4] x86/tsx: Add cmdline tsx=fake to not clear CPUID bits RTM and HLE
On 11.06.2021 12:06, Borislav Petkov wrote:
>On Wed, Jun 09, 2021 at 02:14:39PM -0700, Pawan Gupta wrote:
>> On CPUs that deprecated TSX, clearing the enumeration bits CPUID.RTM and
>> CPUID.HLE may not be desirable in some corner cases. Like a saved guest
>> would refuse to resume if it was saved before the microcode update
>> that deprecated TSX.
>
>That corner case needs a lot more justification. Otherwise this is just
>silly.

Agree, chances of hitting the save/resume guest condition described
above is low. I am okay with dropping this patch.

Thanks,
Pawan

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