Re: [PATCH v2 04/39] x86/cpufeatures: Enable CET CR4 bit for shadow stack
From: Borislav Petkov <bp@alien8.de>
Date: 2022-10-14 19:45:01
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On Fri, Oct 14, 2022 at 06:15:30PM +0000, Edgecombe, Rick P wrote:
Andrew Cooper has suggested to create some software cpu features to differentiate user/supervisor CET feature use. It could replace HAS_KERNEL_IBT. Any objections to that versus Kconfig symbols?
Sure, except you can't use them in
arch/x86/include/asm/idtentry.h:8:#define IDT_ALIGN (8 * (1 + HAS_KERNEL_IBT))
as that gets used in asm code.
But you don't have to do this in this patchset - it is huge already
anyway. I have this thing on my todo so I'll get to it eventually.
Unless you're itching to remove it yourself - then I won't stay in the
way.
:-)
Thx.
--
Regards/Gruss,
Boris.
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