x86/apic: Sanitize APIC address setup

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Convert places which just write mp_lapic_addr and let them register the
local APIC address directly instead of relying on magic other code to do
so.

Add a WARN_ON() into register_lapic_address() which is raised when
register_lapic_address() is invoked more than once during boot.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Tested-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Sohil Mehta <sohil.mehta@intel.com>
Tested-by: Juergen Gross <jgross@suse.com> # Xen PV (dom0 and unpriv. guest)

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This commit is contained in:

Thomas Gleixner 2023-08-08 15:03:49 -07:00 • committed by Dave Hansen

parent 5a88f354dc

commit 81287ad65d

3 changed files with 12 additions and 29 deletions

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1

arch/x86/include/asm/mpspec.h

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29

arch/x86/kernel/apic/apic.c

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11

arch/x86/kernel/mpparse.c

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