x86: make get_cpu_vendor() accessible from Xen code

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In order to be able to differentiate between AMD and Intel based
systems for very early hypercalls without having to rely on the Xen
hypercall page, make get_cpu_vendor() non-static.

Refactor early_cpu_init() for the same reason by splitting out the
loop initializing cpu_devs() into an externally callable function.

This is part of XSA-466 / CVE-2024-53241.

Reported-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Juergen Gross <jgross@suse.com>

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This commit is contained in:

Juergen Gross 2024-10-17 08:29:48 +02:00

parent f9244fb55f

commit efbcd61d9b

2 changed files with 24 additions and 16 deletions

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2

arch/x86/include/asm/processor.h

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38

arch/x86/kernel/cpu/common.c

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