x86/apic: Mop up *setup_apic_routing()

default_setup_apic_routing() is a complete misnomer. On 64bit it does the
actual APIC probing and on 32bit it is used to force select the bigsmp APIC
and to emit a redundant message in the apic::setup_apic_routing() callback.

Rename the 64bit and 32bit function so they reflect what they are doing and
remove the useless APIC 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)

11 files changed, 8 insertions, 33 deletions

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 622dd60229e5..c2656a3ffbec 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1419,7 +1419,9 @@ void __init apic_intr_mode_init(void)
 		break;
 	}
 
-	default_setup_apic_routing();
+	x86_64_probe_apic();
+
+	x86_32_install_bigsmp();
 
 	if (x86_platform.apic_post_init)
 		x86_platform.apic_post_init();
diff --git a/arch/x86/kernel/apic/apic_flat_64.c b/arch/x86/kernel/apic/apic_flat_64.c
index 803cf0123f82..83e02b5796e6 100644
--- a/arch/x86/kernel/apic/apic_flat_64.c
+++ b/arch/x86/kernel/apic/apic_flat_64.c
@@ -101,7 +101,6 @@ static struct apic apic_flat __ro_after_init = {
 	.check_apicid_used		= NULL,
 	.init_apic_ldr			= default_init_apic_ldr,
 	.ioapic_phys_id_map		= NULL,
-	.setup_apic_routing		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.phys_pkg_id			= flat_phys_pkg_id,
 
@@ -178,7 +177,6 @@ static struct apic apic_physflat __ro_after_init = {
 
 	.check_apicid_used		= NULL,
 	.ioapic_phys_id_map		= NULL,
-	.setup_apic_routing		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.phys_pkg_id			= flat_phys_pkg_id,
 
diff --git a/arch/x86/kernel/apic/apic_noop.c b/arch/x86/kernel/apic/apic_noop.c
index 8cab632ed273..e7309fd9cb55 100644
--- a/arch/x86/kernel/apic/apic_noop.c
+++ b/arch/x86/kernel/apic/apic_noop.c
@@ -94,7 +94,6 @@ struct apic apic_noop __ro_after_init = {
 
 	.check_apicid_used		= default_check_apicid_used,
 	.ioapic_phys_id_map		= default_ioapic_phys_id_map,
-	.setup_apic_routing		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 
 	.phys_pkg_id			= noop_phys_pkg_id,
diff --git a/arch/x86/kernel/apic/apic_numachip.c b/arch/x86/kernel/apic/apic_numachip.c
index 8f57155d5f30..b0d5a6ebc379 100644
--- a/arch/x86/kernel/apic/apic_numachip.c
+++ b/arch/x86/kernel/apic/apic_numachip.c
@@ -253,7 +253,6 @@ static const struct apic apic_numachip1 __refconst = {
 
 	.check_apicid_used		= NULL,
 	.ioapic_phys_id_map		= NULL,
-	.setup_apic_routing		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.phys_pkg_id			= numachip_phys_pkg_id,
 
@@ -296,7 +295,6 @@ static const struct apic apic_numachip2 __refconst = {
 
 	.check_apicid_used		= NULL,
 	.ioapic_phys_id_map		= NULL,
-	.setup_apic_routing		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.phys_pkg_id			= numachip_phys_pkg_id,
 
diff --git a/arch/x86/kernel/apic/bigsmp_32.c b/arch/x86/kernel/apic/bigsmp_32.c
index 099611e4ea06..9bbdd40107f7 100644
--- a/arch/x86/kernel/apic/bigsmp_32.c
+++ b/arch/x86/kernel/apic/bigsmp_32.c
@@ -28,13 +28,6 @@ static bool bigsmp_check_apicid_used(physid_mask_t *map, int apicid)
 	return false;
 }
 
-static void bigsmp_setup_apic_routing(void)
-{
-	printk(KERN_INFO
-		"Enabling APIC mode:  Physflat.  Using %d I/O APICs\n",
-		nr_ioapics);
-}
-
 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 */
@@ -101,7 +94,6 @@ static struct apic apic_bigsmp __ro_after_init = {
 
 	.check_apicid_used		= bigsmp_check_apicid_used,
 	.ioapic_phys_id_map		= bigsmp_ioapic_phys_id_map,
-	.setup_apic_routing		= bigsmp_setup_apic_routing,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.phys_pkg_id			= bigsmp_phys_pkg_id,
 
diff --git a/arch/x86/kernel/apic/local.h b/arch/x86/kernel/apic/local.h
index c14674146cfe..345acdeab448 100644
--- a/arch/x86/kernel/apic/local.h
+++ b/arch/x86/kernel/apic/local.h
@@ -66,8 +66,10 @@ void default_send_IPI_mask_sequence_logical(const struct cpumask *mask, int vect
 void default_send_IPI_mask_allbutself_logical(const struct cpumask *mask, int vector);
 void default_send_IPI_mask_logical(const struct cpumask *mask, int vector);
 void x86_32_probe_bigsmp_early(void);
+void x86_32_install_bigsmp(void);
 #else
 static inline void x86_32_probe_bigsmp_early(void) { }
+static inline void x86_32_install_bigsmp(void) { }
 #endif
 
 #ifdef CONFIG_X86_BIGSMP
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c
index c6c3a4b2fcfa..3f717f4c72bc 100644
--- a/arch/x86/kernel/apic/probe_32.c
+++ b/arch/x86/kernel/apic/probe_32.c
@@ -18,15 +18,6 @@
 
 #include "local.h"
 
-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
-}
-
 static int default_apic_id_registered(void)
 {
 	return physid_isset(read_apic_id(), phys_cpu_present_map);
@@ -58,7 +49,6 @@ static struct apic apic_default __ro_after_init = {
 	.check_apicid_used		= default_check_apicid_used,
 	.init_apic_ldr			= default_init_apic_ldr,
 	.ioapic_phys_id_map		= default_ioapic_phys_id_map,
-	.setup_apic_routing		= setup_apic_flat_routing,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.phys_pkg_id			= default_phys_pkg_id,
 
@@ -132,16 +122,13 @@ void __init x86_32_probe_bigsmp_early(void)
 	set_nr_cpu_ids(8);
 }
 
-void __init default_setup_apic_routing(void)
+void __init x86_32_install_bigsmp(void)
 {
 	if (nr_cpu_ids > 8 && !xen_pv_domain())
 		apic_bigsmp_force();
-
-	if (apic->setup_apic_routing)
-		apic->setup_apic_routing();
 }
 
-void __init generic_apic_probe(void)
+void __init x86_32_probe_apic(void)
 {
 	if (!cmdline_apic) {
 		struct apic **drv;
diff --git a/arch/x86/kernel/apic/probe_64.c b/arch/x86/kernel/apic/probe_64.c
index 3c0c8d32be10..7c9f1a8a83c8 100644
--- a/arch/x86/kernel/apic/probe_64.c
+++ b/arch/x86/kernel/apic/probe_64.c
@@ -14,7 +14,7 @@
 #include "local.h"
 
 /* Select the appropriate APIC driver */
-void __init default_setup_apic_routing(void)
+void __init x86_64_probe_apic(void)
 {
 	struct apic **drv;
 
diff --git a/arch/x86/kernel/apic/x2apic_cluster.c b/arch/x86/kernel/apic/x2apic_cluster.c
index a8e7a8f8f22a..52d4be15a7dc 100644
--- a/arch/x86/kernel/apic/x2apic_cluster.c
+++ b/arch/x86/kernel/apic/x2apic_cluster.c
@@ -247,7 +247,6 @@ static struct apic apic_x2apic_cluster __ro_after_init = {
 	.check_apicid_used		= NULL,
 	.init_apic_ldr			= init_x2apic_ldr,
 	.ioapic_phys_id_map		= NULL,
-	.setup_apic_routing		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.phys_pkg_id			= x2apic_phys_pkg_id,
 
diff --git a/arch/x86/kernel/apic/x2apic_phys.c b/arch/x86/kernel/apic/x2apic_phys.c
index 5ac212940901..c57b5c82b14a 100644
--- a/arch/x86/kernel/apic/x2apic_phys.c
+++ b/arch/x86/kernel/apic/x2apic_phys.c
@@ -166,7 +166,6 @@ static struct apic apic_x2apic_phys __ro_after_init = {
 
 	.check_apicid_used		= NULL,
 	.ioapic_phys_id_map		= NULL,
-	.setup_apic_routing		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.phys_pkg_id			= x2apic_phys_pkg_id,
 
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index d6b98bc0745a..a8caff181adf 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -838,7 +838,6 @@ static struct apic apic_x2apic_uv_x __ro_after_init = {
 
 	.check_apicid_used		= NULL,
 	.ioapic_phys_id_map		= NULL,
-	.setup_apic_routing		= NULL,
 	.cpu_present_to_apicid		= default_cpu_present_to_apicid,
 	.phys_pkg_id			= uv_phys_pkg_id,