Re: [PATCH 4/4] x86/tsx: Add cmdline tsx=fake to not clear CPUID bits RTM and HLE
From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
Date: 2021-06-11 21:37:24
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On 11.06.2021 12:06, Borislav Petkov wrote:
On Wed, Jun 09, 2021 at 02:14:39PM -0700, Pawan Gupta wrote:quoted
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