[Devel] [PATCH hci-8.1 v4 2/5] x86/ve: enable CPUID faulting at once when the current task enters a VE

[no-reply at sashiko.virtuozzo.com]

> ve_setup_task() only sets TIF_CPUID_OVERRIDE. The MSR follows the flag
> in __switch_to_xtra(), so a task that enters a VE through unshare() or
> setns() keeps executing CPUID natively until it is scheduled out for the
> first time and sees the host values instead of the override table.
> 
> Add set_cpuid_override(), which sets the flag and, like disable_cpuid(),
> flips the CPU state synchronously when the task is the current one.
> Tasks set up through clone() are not running yet and are still handled
> at their first switch-in.
> 
> https://virtuozzo.atlassian.net/browse/VSTOR-148843
> 
> Feature: x86: cpu pools (cpuid override)
> Signed-off-by: Konstantin Khorenko <khorenko at virtuozzo.com>

Sashiko has reviewed this patch and found no issues. It looks great!

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Sashiko AI review · https://sashiko.vzint.dev/#/patchset/20261007-b4-prep-khorenko-vstor-148656-cpuid-v4-0-bf16c29bea24@virtuozzo.com?part=2