From d92e5e7cf580ac59678fa40fd99aa8eb00f1ff52 Mon Sep 17 00:00:00 2001
From: Thomas Gleixner <tglx@linutronix.de>
Date: Tue, 8 Aug 2023 15:04:10 -0700
Subject: x86/apic: Add max_apic_id member

There is really no point to have a callback which compares numbers.

Add a field which allows each APIC to store the maximum APIC ID supported
and fill it in for all APIC incarnations.

The next step will remove the callback.

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)
---
 arch/x86/xen/apic.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/x86/xen')

diff --git a/arch/x86/xen/apic.c b/arch/x86/xen/apic.c
index 0f71b2e79c76..572814b29c6d 100644
--- a/arch/x86/xen/apic.c
+++ b/arch/x86/xen/apic.c
@@ -138,6 +138,7 @@ static struct apic xen_pv_apic = {
 	.cpu_present_to_apicid		= xen_cpu_present_to_apicid,
 	.phys_pkg_id			= xen_phys_pkg_id, /* detect_ht */
 
+	.max_apic_id			= UINT_MAX,
 	.get_apic_id 			= xen_get_apic_id,
 	.set_apic_id 			= xen_set_apic_id, /* Can be NULL on 32-bit. */
 
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