x86/apic: Consolidate boot_cpu_physical_apicid initialization sites

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boot_cpu_physical_apicid is written in random places and in the last
consequence filled with the APIC ID read from the local APIC. That causes
it to have inconsistent state when the MPTABLE is broken. As a consequence
tons of moronic checks are sprinkled all over the place.

Consolidate the code and read it exactly once when either X2APIC mode is
detected early or when the APIC mapping is established.

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 15:03:45 -07:00 • committed by Dave Hansen

parent 1d90c9f731

commit d10a904435

3 changed files with 34 additions and 74 deletions

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2

arch/x86/include/asm/apic.h

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102

arch/x86/kernel/apic/apic.c

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4

arch/x86/kernel/mpparse.c

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