Re: [RFC PATCH v1 01/15] x86/msr: Replace __wrmsr() with native_wrmsrl()

[Andrew Cooper]

On 31/03/2025 9:22 am, Xin Li (Intel) wrote:
> __wrmsr() is the lowest level primitive MSR write API, and its direct
> use is NOT preferred.  Use its wrapper function native_wrmsrl() instead.
>
> No functional change intended.
>
> Signed-off-by: Xin Li (Intel) <xin@xxxxxxxxx>

The critical piece of information you're missing from the commit message
is that the MSR_IMM instructions take a single u64.

Therefore to use them, you've got to arrange for all callers to provide
a single u64, rather than a split u32 pair.

~Andrew