On Mon, Apr 29, 2024 at 06:16:54PM +0300, Kirill A. Shutemov wrote:
> Yes, that's what happens in current upstream.
Let's rewrite that commit message then:
"TDX guests run with MCA enabled (CR4.MCE=1b) from the very start. If
that bit is cleared during CR4 register reprogramming during boot or
kexec flows, a #VE exception will be raised which the guest kernel
cannot handle that early.
Therefore, make sure the CR4.MCE setting is preserved over kexec too and
avoid raising any #VEs."
without that bit about TDX guests might be allowed to clear CR4.MCE
which is only confusing and unnecessary.
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
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