Re: [PATCH Part1 RFC v4 15/36] x86/mm: Add support to validate memory when changing C-bit

On Tue, Aug 17, 2021 at 03:34:41PM -0500, Brijesh Singh wrote:

I am not seeing any strong reason to sanity check the reserved bit in the
psc_entry. The fields in the psc_entry are input from guest to the
hypervisor. The hypervisor cannot trick a guest by changing anything in the
psc_entry because guest does not read the hypervisor filled value. I am okay
with the psc_hdr because we need to read the current and end entry after the
PSC completes to determine whether it was successful and sanity checking PSC
header makes much more sense. Let me know if you are okay with it ?

Ok, fair enough.

Thx.

-- 
Regards/Gruss,
    Boris.

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