x86/tdx: Dump attributes and TD_CTLS on boot

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Dump TD configuration on boot. Attributes and TD_CTLS define TD
behavior. This information is useful for tracking down bugs.

The output ends up looking like this in practice:

[    0.000000] tdx: Guest detected
[    0.000000] tdx: Attributes: SEPT_VE_DISABLE
[    0.000000] tdx: TD_CTLS: PENDING_VE_DISABLE ENUM_TOPOLOGY VIRT_CPUID2 REDUCE_VE

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Nikolay Borisov <nik.borisov@suse.com>
Link: https://lore.kernel.org/all/20241202072458.447455-1-kirill.shutemov%40linux.intel.com

...

This commit is contained in:

Kirill A. Shutemov 2024-12-02 09:24:58 +02:00 • committed by Dave Hansen

parent cd9ce82173

commit 564ea84c8c

5 changed files with 128 additions and 12 deletions

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2

arch/x86/coco/tdx/Makefile

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69

arch/x86/coco/tdx/debug.c

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27

arch/x86/coco/tdx/tdx.c

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39

arch/x86/include/asm/shared/tdx.h

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3

arch/x86/include/asm/tdx.h

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