Re: [PATCH 1/3] x86/cpuid: Rework HLE and RTM handling

2021-05-27 Thread Roger Pau Monné
On Thu, May 27, 2021 at 02:25:17PM +0100, Andrew Cooper wrote: > The TAA mitigation offered the option to hide the HLE and RTM CPUID bits, > which has caused some migration compatibility problems. > > These two bits are special. Annotate them with ! to emphasise this point. > > Hardware Lock Eli

Re: [PATCH 1/3] x86/cpuid: Rework HLE and RTM handling

2021-05-27 Thread Jan Beulich
On 27.05.2021 15:25, Andrew Cooper wrote: > The TAA mitigation offered the option to hide the HLE and RTM CPUID bits, > which has caused some migration compatibility problems. > > These two bits are special. Annotate them with ! to emphasise this point. > > Hardware Lock Elision (HLE) may or may

[PATCH 1/3] x86/cpuid: Rework HLE and RTM handling

2021-05-27 Thread Andrew Cooper
The TAA mitigation offered the option to hide the HLE and RTM CPUID bits, which has caused some migration compatibility problems. These two bits are special. Annotate them with ! to emphasise this point. Hardware Lock Elision (HLE) may or may not be visible in CPUID, but is disabled in microcode