Re: [PATCH v4 02/19] KVM: VMX: Initialize VM entry/exit FRED controls in vmcs_config

[Xin Li]

On 4/14/2025 12:41 AM, Chao Gao wrote:
> > +		{ VM_ENTRY_LOAD_IA32_FRED,		VM_EXIT_ACTIVATE_SECONDARY_CONTROLS },
> This line should be removed. It enforces that "Activate secondary controls"
> is supported iff FRED is supported, which isn't true.
>
> Bit 3 of 2nd VM-exit controls is "Prematurely busy shadow stack". Some CPUs
> support it, but not FRED.

Sigh, 2nd time on the same shit.