1 files changed, 25 insertions, 173 deletions

diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index eb35ef9ee63f..87bc9e7ca5d6 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -1,69 +1,31 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Default generic APIC driver. This handles up to 8 CPUs.
  *
  * Copyright 2003 Andi Kleen, SuSE Labs.
- * Subject to the GNU Public License, v.2
  *
  * Generic x86 APIC driver probe layer.
  */
-#include <linux/threads.h>
-#include <linux/cpumask.h>
-#include <linux/module.h>
-#include <linux/string.h>
-#include <linux/kernel.h>
-#include <linux/ctype.h>
-#include <linux/init.h>
+#include <linux/export.h>
 #include <linux/errno.h>
-#include <asm/fixmap.h>
-#include <asm/mpspec.h>
-#include <asm/apicdef.h>
-#include <asm/apic.h>
-#include <asm/setup.h>
-
 #include <linux/smp.h>
-#include <asm/ipi.h>
-
-#include <linux/interrupt.h>
-#include <asm/acpi.h>
-#include <asm/e820.h>
 
-#ifdef CONFIG_HOTPLUG_CPU
-#define DEFAULT_SEND_IPI	(1)
-#else
-#define DEFAULT_SEND_IPI	(0)
-#endif
+#include <xen/xen.h>
 
-int no_broadcast = DEFAULT_SEND_IPI;
+#include <asm/io_apic.h>
+#include <asm/apic.h>
+#include <asm/acpi.h>
 
-static __init int no_ipi_broadcast(char *str)
-{
-	get_option(&str, &no_broadcast);
-	pr_info("Using %s mode\n",
-		no_broadcast ? "No IPI Broadcast" : "IPI Broadcast");
-	return 1;
-}
-__setup("no_ipi_broadcast=", no_ipi_broadcast);
+#include "local.h"
 
-static int __init print_ipi_mode(void)
+static u32 default_get_apic_id(u32 x)
 {
-	pr_info("Using IPI %s mode\n",
-		no_broadcast ? "No-Shortcut" : "Shortcut");
-	return 0;
-}
-late_initcall(print_ipi_mode);
+	unsigned int ver = GET_APIC_VERSION(apic_read(APIC_LVR));
 
-static int default_x86_32_early_logical_apicid(int cpu)
-{
-	return 1 << cpu;
-}
-
-static void setup_apic_flat_routing(void)
-{
-#ifdef CONFIG_X86_IO_APIC
-	printk(KERN_INFO
-		"Enabling APIC mode:  Flat.  Using %d I/O APICs\n",
-		nr_ioapics);
-#endif
+	if (APIC_XAPIC(ver) || boot_cpu_has(X86_FEATURE_EXTD_APICID))
+		return (x >> 24) & 0xFF;
+	else
+		return (x >> 24) & 0x0F;
 }
 
 /* should be called last. */
@@ -72,72 +34,42 @@ static int probe_default(void)
 	return 1;
 }
 
-static struct apic apic_default = {
+static struct apic apic_default __ro_after_init = {
 
 	.name				= "default",
 	.probe				= probe_default,
-	.acpi_madt_oem_check		= NULL,
-	.apic_id_valid			= default_apic_id_valid,
-	.apic_id_registered		= default_apic_id_registered,
 
-	.irq_delivery_mode		= dest_LowestPrio,
-	/* logical delivery broadcast to all CPUs: */
-	.irq_dest_mode			= 1,
+	.dest_mode_logical		= true,
 
-	.target_cpus			= default_target_cpus,
 	.disable_esr			= 0,
-	.dest_logical			= APIC_DEST_LOGICAL,
-	.check_apicid_used		= default_check_apicid_used,
-	.check_apicid_present		= default_check_apicid_present,
 
-	.vector_allocation_domain	= flat_vector_allocation_domain,
 	.init_apic_ldr			= default_init_apic_ldr,
-
-	.ioapic_phys_id_map		= default_ioapic_phys_id_map,
-	.setup_apic_routing		= setup_apic_flat_routing,
-	.multi_timer_check		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
-	.apicid_to_cpu_present		= physid_set_mask_of_physid,
-	.setup_portio_remap		= NULL,
-	.check_phys_apicid_present	= default_check_phys_apicid_present,
-	.enable_apic_mode		= NULL,
-	.phys_pkg_id			= default_phys_pkg_id,
-	.mps_oem_check			= NULL,
 
+	.max_apic_id			= 0xFE,
 	.get_apic_id			= default_get_apic_id,
-	.set_apic_id			= NULL,
-	.apic_id_mask			= 0x0F << 24,
 
-	.cpu_mask_to_apicid_and		= flat_cpu_mask_to_apicid_and,
+	.calc_dest_apicid		= apic_flat_calc_apicid,
 
+	.send_IPI			= default_send_IPI_single,
 	.send_IPI_mask			= default_send_IPI_mask_logical,
 	.send_IPI_mask_allbutself	= default_send_IPI_mask_allbutself_logical,
 	.send_IPI_allbutself		= default_send_IPI_allbutself,
 	.send_IPI_all			= default_send_IPI_all,
 	.send_IPI_self			= default_send_IPI_self,
 
-	.trampoline_phys_low		= DEFAULT_TRAMPOLINE_PHYS_LOW,
-	.trampoline_phys_high		= DEFAULT_TRAMPOLINE_PHYS_HIGH,
-
-	.wait_for_init_deassert		= default_wait_for_init_deassert,
-
-	.smp_callin_clear_local_apic	= NULL,
-	.inquire_remote_apic		= default_inquire_remote_apic,
-
 	.read				= native_apic_mem_read,
 	.write				= native_apic_mem_write,
-	.eoi_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			= native_apic_wait_icr_idle,
-	.safe_wait_icr_idle		= native_safe_apic_wait_icr_idle,
-
-	.x86_32_early_logical_apicid	= default_x86_32_early_logical_apicid,
+	.wait_icr_idle			= apic_mem_wait_icr_idle,
+	.safe_wait_icr_idle		= apic_mem_wait_icr_idle_timeout,
 };
 
 apic_driver(apic_default);
 
-struct apic *apic = &apic_default;
+struct apic *apic __ro_after_init = &apic_default;
 EXPORT_SYMBOL_GPL(apic);
 
 static int cmdline_apic __initdata;
@@ -150,7 +82,7 @@ static int __init parse_apic(char *arg)
 
 	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
 		if (!strcmp((*drv)->name, arg)) {
-			apic = *drv;
+			apic_install_driver(*drv);
 			cmdline_apic = 1;
 			return 0;
 		}
@@ -161,50 +93,14 @@ static int __init parse_apic(char *arg)
 }
 early_param("apic", parse_apic);
 
-void __init default_setup_apic_routing(void)
-{
-	int version = apic_version[boot_cpu_physical_apicid];
-
-	if (num_possible_cpus() > 8) {
-		switch (boot_cpu_data.x86_vendor) {
-		case X86_VENDOR_INTEL:
-			if (!APIC_XAPIC(version)) {
-				def_to_bigsmp = 0;
-				break;
-			}
-			/* If P4 and above fall through */
-		case X86_VENDOR_AMD:
-			def_to_bigsmp = 1;
-		}
-	}
-
-#ifdef CONFIG_X86_BIGSMP
-	/*
-	 * This is used to switch to bigsmp mode when
-	 * - There is no apic= option specified by the user
-	 * - generic_apic_probe() has chosen apic_default as the sub_arch
-	 * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support
-	 */
-
-	if (!cmdline_apic && apic == &apic_default)
-		generic_bigsmp_probe();
-#endif
-
-	if (apic->setup_apic_routing)
-		apic->setup_apic_routing();
-
-	if (x86_platform.apic_post_init)
-		x86_platform.apic_post_init();
-}
-
-void __init generic_apic_probe(void)
+void __init x86_32_probe_apic(void)
 {
 	if (!cmdline_apic) {
 		struct apic **drv;
 
 		for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
 			if ((*drv)->probe()) {
-				apic = *drv;
+				apic_install_driver(*drv);
 				break;
 			}
 		}
@@ -212,48 +108,4 @@ void __init generic_apic_probe(void)
 		if (drv == __apicdrivers_end)
 			panic("Didn't find an APIC driver");
 	}
-	printk(KERN_INFO "Using APIC driver %s\n", apic->name);
-}
-
-/* These functions can switch the APIC even after the initial ->probe() */
-
-int __init
-generic_mps_oem_check(struct mpc_table *mpc, char *oem, char *productid)
-{
-	struct apic **drv;
-
-	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
-		if (!((*drv)->mps_oem_check))
-			continue;
-		if (!(*drv)->mps_oem_check(mpc, oem, productid))
-			continue;
-
-		if (!cmdline_apic) {
-			apic = *drv;
-			printk(KERN_INFO "Switched to APIC driver `%s'.\n",
-			       apic->name);
-		}
-		return 1;
-	}
-	return 0;
-}
-
-int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
-{
-	struct apic **drv;
-
-	for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
-		if (!(*drv)->acpi_madt_oem_check)
-			continue;
-		if (!(*drv)->acpi_madt_oem_check(oem_id, oem_table_id))
-			continue;
-
-		if (!cmdline_apic) {
-			apic = *drv;
-			printk(KERN_INFO "Switched to APIC driver `%s'.\n",
-			       apic->name);
-		}
-		return 1;
-	}
-	return 0;
 }