x86/sev: Provide PIC aliases for SEV related data objects

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Provide PIC aliases for data objects that are shared between the SEV startup
code and the SEV code that executes later. This is needed so that the confined
startup code is permitted to access them.

This requires some of these variables to be moved into a source file that is
not part of the startup code, as the PIC alias is already implied, and
exporting variables in the opposite direction is not supported.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/20250828102202.1849035-36-ardb+git@google.com

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This commit is contained in:

Ard Biesheuvel 2025-08-28 12:22:15 +02:00 • committed by Borislav Petkov (AMD)

parent f27906b287

commit 9723dd0c70

4 changed files with 37 additions and 28 deletions

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3

arch/x86/boot/compressed/sev.c

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19

arch/x86/boot/startup/sev-shared.c

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9

arch/x86/boot/startup/sev-startup.c

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34

arch/x86/coco/sev/core.c

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