linux-kernel - [RFC 5/5] x86/apic: Make Parker instance use physical APIC

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Message-Id: <20250923153146.365015-6-fam.zheng@bytedance.com>
Date: Tue, 23 Sep 2025 15:31:46 +0000
From: Fam Zheng <fam.zheng@...edance.com>
To: linux-kernel@...r.kernel.org
Cc: Lukasz Luba <lukasz.luba@....com>,
	linyongting@...edance.com,
	songmuchun@...edance.com,
	satish.kumar@...edance.com,
	Borislav Petkov <bp@...en8.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	yuanzhu@...edance.com,
	Ingo Molnar <mingo@...hat.com>,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	fam.zheng@...edance.com,
	Zhang Rui <rui.zhang@...el.com>,
	fam@...hon.net,
	"H. Peter Anvin" <hpa@...or.com>,
	x86@...nel.org,
	liangma@...edance.com,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"Rafael J. Wysocki" <rafael@...nel.org>,
	guojinhui.liam@...edance.com,
	linux-pm@...r.kernel.org,
	Thom Hughes <thom.hughes@...edance.com>
Subject: [RFC 5/5] x86/apic: Make Parker instance use physical APIC

From: Thom Hughes <thom.hughes@...edance.com>

Signed-off-by: Thom Hughes <thom.hughes@...edance.com>
Signed-off-by: Fam Zheng <fam.zheng@...edance.com>
---
 arch/x86/kernel/apic/apic_flat_64.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index e0308d8c4e6c..e753125a1de8 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -9,6 +9,7 @@
  * James Cleverdon.
  */
 #include <linux/export.h>
+#include <linux/parker.h>
 
 #include <asm/apic.h>
 
@@ -21,7 +22,7 @@ static u32 physflat_get_apic_id(u32 x)
 
 static int physflat_probe(void)
 {
-	return 1;
+	return is_parker_instance();
 }
 
 static int physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
-- 
2.39.5