1 files changed, 13 insertions, 76 deletions

diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
index 77555f66c14d..0e5535add4b5 100644
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -18,56 +18,17 @@ static unsigned bigsmp_get_apic_id(unsigned long x)
 	return (x >> 24) & 0xFF;
 }
 
-static int bigsmp_apic_id_registered(void)
-{
-	return 1;
-}
-
 static bool bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
 {
 	return false;
 }
 
-static int bigsmp_early_logical_apicid(int cpu)
-{
-	/* on bigsmp, logical apicid is the same as physical */
-	return early_per_cpu(x86_cpu_to_apicid, cpu);
-}
-
-/*
- * bigsmp enables physical destination mode
- * and doesn't use LDR and DFR
- */
-static void bigsmp_init_apic_ldr(void)
-{
-}
-
-static void bigsmp_setup_apic_routing(void)
-{
-	printk(KERN_INFO
-		"Enabling APIC mode:  Physflat.  Using %d I/O APICs\n",
-		nr_ioapics);
-}
-
-static int bigsmp_cpu_present_to_apicid(int mps_cpu)
-{
-	if (mps_cpu < nr_cpu_ids)
-		return (int) per_cpu(x86_bios_cpu_apicid, mps_cpu);
-
-	return BAD_APICID;
-}
-
 static void bigsmp_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap)
 {
 	/* For clustered we don't have a good way to do this yet - hack */
 	physids_promote(0xFFL, retmap);
 }
 
-static int bigsmp_check_phys_apicid_present(int phys_apicid)
-{
-	return 1;
-}
-
 static int bigsmp_phys_pkg_id(int cpuid_apic, int index_msb)
 {
 	return cpuid_apic >> index_msb;
@@ -111,21 +72,13 @@ static const struct dmi_system_id bigsmp_dmi_table[] = {
 
 static int probe_bigsmp(void)
 {
-	if (def_to_bigsmp)
-		dmi_bigsmp = 1;
-	else
-		dmi_check_system(bigsmp_dmi_table);
-
-	return dmi_bigsmp;
+	return dmi_check_system(bigsmp_dmi_table);
 }
 
 static struct apic apic_bigsmp __ro_after_init = {
 
 	.name				= "bigsmp",
 	.probe				= probe_bigsmp,
-	.acpi_madt_oem_check		= NULL,
-	.apic_id_valid			= default_apic_id_valid,
-	.apic_id_registered		= bigsmp_apic_id_registered,
 
 	.delivery_mode			= APIC_DELIVERY_MODE_FIXED,
 	.dest_mode_logical		= false,
@@ -133,14 +86,11 @@ static struct apic apic_bigsmp __ro_after_init = {
 	.disable_esr			= 1,
 
 	.check_apicid_used		= bigsmp_check_apicid_used,
-	.init_apic_ldr			= bigsmp_init_apic_ldr,
 	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
-	.setup_apic_routing		= bigsmp_setup_apic_routing,
-	.cpu_present_to_apicid		= bigsmp_cpu_present_to_apicid,
-	.apicid_to_cpu_present		= physid_set_mask_of_physid,
-	.check_phys_apicid_present	= bigsmp_check_phys_apicid_present,
+	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.phys_pkg_id			= bigsmp_phys_pkg_id,
 
+	.max_apic_id			= 0xFE,
 	.get_apic_id			= bigsmp_get_apic_id,
 	.set_apic_id			= NULL,
 
@@ -153,37 +103,24 @@ static struct apic apic_bigsmp __ro_after_init = {
 	.send_IPI_all			= bigsmp_send_IPI_all,
 	.send_IPI_self			= default_send_IPI_self,
 
-	.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	= bigsmp_early_logical_apicid,
+	.wait_icr_idle			= apic_mem_wait_icr_idle,
+	.safe_wait_icr_idle		= apic_mem_wait_icr_idle_timeout,
 };
 
-void __init generic_bigsmp_probe(void)
+bool __init apic_bigsmp_possible(bool cmdline_override)
 {
-	unsigned int cpu;
-
-	if (!probe_bigsmp())
-		return;
-
-	apic = &apic_bigsmp;
-
-	for_each_possible_cpu(cpu) {
-		if (early_per_cpu(x86_cpu_to_logical_apicid,
-				  cpu) == BAD_APICID)
-			continue;
-		early_per_cpu(x86_cpu_to_logical_apicid, cpu) =
-			bigsmp_early_logical_apicid(cpu);
-	}
+	return apic == &apic_bigsmp || !cmdline_override;
+}
 
-	pr_info("Overriding APIC driver with %s\n", apic_bigsmp.name);
+void __init apic_bigsmp_force(void)
+{
+	if (apic != &apic_bigsmp)
+		apic_install_driver(&apic_bigsmp);
 }
 
 apic_driver(apic_bigsmp);