diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h
index 9327eb00e96d09..be2045a18e69b9 100644
--- a/arch/x86/include/asm/apic.h
+++ b/arch/x86/include/asm/apic.h
@@ -345,20 +345,12 @@ extern struct apic *apic;
  * APIC drivers are probed based on how they are listed in the .apicdrivers
  * section. So the order is important and enforced by the ordering
  * of different apic driver files in the Makefile.
- *
- * For the files having two apic drivers, we use apic_drivers()
- * to enforce the order with in them.
  */
 #define apic_driver(sym)					\
 	static const struct apic *__apicdrivers_##sym __used		\
 	__aligned(sizeof(struct apic *))			\
 	__section(".apicdrivers") = { &sym }
 
-#define apic_drivers(sym1, sym2)					\
-	static struct apic *__apicdrivers_##sym1##sym2[2] __used	\
-	__aligned(sizeof(struct apic *))				\
-	__section(".apicdrivers") = { &sym1, &sym2 }
-
 extern struct apic *__apicdrivers[], *__apicdrivers_end[];
 
 /*
diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index f37ad3392fec91..e0308d8c4e6c27 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -8,129 +8,25 @@
  * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and
  * James Cleverdon.
  */
-#include <linux/cpumask.h>
 #include <linux/export.h>
-#include <linux/acpi.h>
 
-#include <asm/jailhouse_para.h>
 #include <asm/apic.h>
 
 #include "local.h"
 
-static struct apic apic_physflat;
-static struct apic apic_flat;
-
-struct apic *apic __ro_after_init = &apic_flat;
-EXPORT_SYMBOL_GPL(apic);
-
-static int flat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
-{
-	return 1;
-}
-
-static void _flat_send_IPI_mask(unsigned long mask, int vector)
-{
-	unsigned long flags;
-
-	local_irq_save(flags);
-	__default_send_IPI_dest_field(mask, vector, APIC_DEST_LOGICAL);
-	local_irq_restore(flags);
-}
-
-static void flat_send_IPI_mask(const struct cpumask *cpumask, int vector)
-{
-	unsigned long mask = cpumask_bits(cpumask)[0];
-
-	_flat_send_IPI_mask(mask, vector);
-}
-
-static void
-flat_send_IPI_mask_allbutself(const struct cpumask *cpumask, int vector)
-{
-	unsigned long mask = cpumask_bits(cpumask)[0];
-	int cpu = smp_processor_id();
-
-	if (cpu < BITS_PER_LONG)
-		__clear_bit(cpu, &mask);
-
-	_flat_send_IPI_mask(mask, vector);
-}
-
-static u32 flat_get_apic_id(u32 x)
+static u32 physflat_get_apic_id(u32 x)
 {
 	return (x >> 24) & 0xFF;
 }
 
-static int flat_probe(void)
+static int physflat_probe(void)
 {
 	return 1;
 }
 
-static struct apic apic_flat __ro_after_init = {
-	.name				= "flat",
-	.probe				= flat_probe,
-	.acpi_madt_oem_check		= flat_acpi_madt_oem_check,
-
-	.dest_mode_logical		= true,
-
-	.disable_esr			= 0,
-
-	.init_apic_ldr			= default_init_apic_ldr,
-	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
-
-	.max_apic_id			= 0xFE,
-	.get_apic_id			= flat_get_apic_id,
-
-	.calc_dest_apicid		= apic_flat_calc_apicid,
-
-	.send_IPI			= default_send_IPI_single,
-	.send_IPI_mask			= flat_send_IPI_mask,
-	.send_IPI_mask_allbutself	= flat_send_IPI_mask_allbutself,
-	.send_IPI_allbutself		= default_send_IPI_allbutself,
-	.send_IPI_all			= default_send_IPI_all,
-	.send_IPI_self			= default_send_IPI_self,
-	.nmi_to_offline_cpu		= true,
-
-	.read				= native_apic_mem_read,
-	.write				= native_apic_mem_write,
-	.eoi				= native_apic_mem_eoi,
-	.icr_read			= native_apic_icr_read,
-	.icr_write			= native_apic_icr_write,
-	.wait_icr_idle			= apic_mem_wait_icr_idle,
-	.safe_wait_icr_idle		= apic_mem_wait_icr_idle_timeout,
-};
-
-/*
- * Physflat mode is used when there are more than 8 CPUs on a system.
- * We cannot use logical delivery in this case because the mask
- * overflows, so use physical mode.
- */
 static int physflat_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
 {
-#ifdef CONFIG_ACPI
-	/*
-	 * Quirk: some x86_64 machines can only use physical APIC mode
-	 * regardless of how many processors are present (x86_64 ES7000
-	 * is an example).
-	 */
-	if (acpi_gbl_FADT.header.revision >= FADT2_REVISION_ID &&
-		(acpi_gbl_FADT.flags & ACPI_FADT_APIC_PHYSICAL)) {
-		printk(KERN_DEBUG "system APIC only can use physical flat");
-		return 1;
-	}
-
-	if (!strncmp(oem_id, "IBM", 3) && !strncmp(oem_table_id, "EXA", 3)) {
-		printk(KERN_DEBUG "IBM Summit detected, will use apic physical");
-		return 1;
-	}
-#endif
-
-	return 0;
-}
-
-static int physflat_probe(void)
-{
-	return apic == &apic_physflat || num_possible_cpus() > 8 || jailhouse_paravirt();
+	return 1;
 }
 
 static struct apic apic_physflat __ro_after_init = {
@@ -146,7 +42,7 @@ static struct apic apic_physflat __ro_after_init = {
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 
 	.max_apic_id			= 0xFE,
-	.get_apic_id			= flat_get_apic_id,
+	.get_apic_id			= physflat_get_apic_id,
 
 	.calc_dest_apicid		= apic_default_calc_apicid,
 
@@ -166,8 +62,7 @@ static struct apic apic_physflat __ro_after_init = {
 	.wait_icr_idle			= apic_mem_wait_icr_idle,
 	.safe_wait_icr_idle		= apic_mem_wait_icr_idle_timeout,
 };
+apic_driver(apic_physflat);
 
-/*
- * We need to check for physflat first, so this order is important.
- */
-apic_drivers(apic_physflat, apic_flat);
+struct apic *apic __ro_after_init = &apic_physflat;
+EXPORT_SYMBOL_GPL(apic);