x86/cpu: fix unbootable VMs by inlining memcmp() in hypervisor_cpuid_base()

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If this memcmp() is not inlined then PVH early boot code can call
into KASAN-instrumented memcmp() which results in unbootable VMs:

	pvh_start_xen
	xen_prepare_pvh
	xen_cpuid_base
	hypervisor_cpuid_base
	memcmp

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Acked-by: Juergen Gross <jgross@suse.com>
Message-ID: <20240802154253.482658-2-adobriyan@gmail.com>
Signed-off-by: Juergen Gross <jgross@suse.com>

...

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Alexey Dobriyan 2024-08-02 18:42:52 +03:00 • committed by Juergen Gross

parent 661362e3dc

commit 416a33c9af

1 changed files with 6 additions and 1 deletions

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7

arch/x86/include/asm/cpuid.h

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