From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 8 Aug 2023 22:03:50 +0000 (-0700)
Subject: x86/apic: Nuke another processor check
X-Git-Tag: v6.6-rc1~141^2~42
X-Git-Url: https://git.kernel.dk/?a=commitdiff_plain;h=55cc40d3df3c5c49f3a72e451bb710ec9e398ddc;p=linux-block.git

x86/apic: Nuke another processor check

The boot CPUs local APIC is now always registered, so there is no point to
have another unreadable validatation for it.

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)
---

diff --git a/arch/x86/kernel/smpboot.c b/arch/x86/kernel/smpboot.c
index fc2173b7dc89..da795f743542 100644
--- a/arch/x86/kernel/smpboot.c
+++ b/arch/x86/kernel/smpboot.c
@@ -1181,23 +1181,6 @@ static void __init smp_sanity_check(void)
 		set_nr_cpu_ids(8);
 	}
 #endif
-
-	if (!physid_isset(read_apic_id(), phys_cpu_present_map)) {
-		pr_warn("weird, boot CPU (#%d) not listed by the BIOS\n",
-			read_apic_id());
-
-		physid_set(read_apic_id(), phys_cpu_present_map);
-	}
-
-	/*
-	 * Should not be necessary because the MP table should list the boot
-	 * CPU too, but we do it for the sake of robustness anyway.
-	 */
-	if (!apic->check_phys_apicid_present(boot_cpu_physical_apicid)) {
-		pr_notice("weird, boot CPU (#%d) not listed by the BIOS\n",
-			  boot_cpu_physical_apicid);
-		physid_set(read_apic_id(), phys_cpu_present_map);
-	}
 	preempt_enable();
 }