cpu/*: Drop PARALLEL_MP leftovers

These symbols and codepaths are unused now so drop them.

Change-Id: I7c46c36390f116f8f8920c06e539075e60c7118c
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/69361
Reviewed-by: Kyösti Mälkki <kyosti.malkki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

7 files changed, 1 insertions, 127 deletions

diff --git a/src/cpu/intel/hyperthreading/Makefile.inc b/src/cpu/intel/hyperthreading/Makefile.inc
deleted file mode 100644
index 8adbad9e21..0000000000
--- a/src/cpu/intel/hyperthreading/Makefile.inc
+++ /dev/null
@@ -1 +0,0 @@
-ramstage-y += intel_sibling.c
diff --git a/src/cpu/intel/hyperthreading/intel_sibling.c b/src/cpu/intel/hyperthreading/intel_sibling.c
deleted file mode 100644
index 773d8e261c..0000000000
--- a/src/cpu/intel/hyperthreading/intel_sibling.c
+++ /dev/null
@@ -1,65 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-#include <console/console.h>
-#include <cpu/cpu.h>
-#include <cpu/intel/hyperthreading.h>
-#include <device/device.h>
-#include <option.h>
-
-/* Intel hyper-threading requires serialized CPU init. */
-
-static int first_time = 1;
-static int disable_siblings = !CONFIG(LOGICAL_CPUS);
-
-void intel_sibling_init(struct device *cpu)
-{
-	unsigned int i, siblings;
-	struct cpuid_result result;
-
-	/* On the bootstrap processor see if I want sibling cpus enabled */
-	if (first_time) {
-		first_time = 0;
-		disable_siblings = get_uint_option("hyper_threading", disable_siblings);
-	}
-	result = cpuid(1);
-	/* Is hyperthreading supported */
-	if (!(result.edx & (1 << 28)))
-		return;
-
-	/* See how many sibling cpus we have */
-	siblings = (result.ebx >> 16) & 0xff;
-	if (siblings < 1)
-		siblings = 1;
-
-	printk(BIOS_DEBUG, "CPU: %u %d siblings\n",
-		cpu->path.apic.apic_id,
-		siblings);
-
-	/* See if I am a sibling cpu */
-	if (cpu->path.apic.apic_id & (siblings - 1)) {
-		if (disable_siblings)
-			cpu->enabled = 0;
-		return;
-	}
-
-	/* I am the primary CPU start up my siblings */
-	for (i = 1; i < siblings; i++) {
-		struct device_path cpu_path;
-		struct device *new;
-		/* Build the CPU device path */
-		cpu_path.type = DEVICE_PATH_APIC;
-		cpu_path.apic.apic_id = cpu->path.apic.apic_id + i;
-
-		/* Allocate new CPU device structure iff sibling CPU
-		 * was not in static device tree.
-		 */
-		new = alloc_find_dev(cpu->bus, &cpu_path);
-
-		if (!new)
-			continue;
-
-		printk(BIOS_DEBUG, "CPU: %u has sibling %u\n",
-			cpu->path.apic.apic_id,
-			new->path.apic.apic_id);
-	}
-}
diff --git a/src/cpu/intel/model_f3x/Makefile.inc b/src/cpu/intel/model_f3x/Makefile.inc
index c855996cf1..95b56f4a91 100644
--- a/src/cpu/intel/model_f3x/Makefile.inc
+++ b/src/cpu/intel/model_f3x/Makefile.inc
@@ -1,6 +1,5 @@
 ramstage-y += model_f3x_init.c
 
-subdirs-y += ../hyperthreading
 subdirs-y += ../smm/gen1
 
 ramstage-$(CONFIG_PARALLEL_MP) += ../model_1067x/mp_init.c
diff --git a/src/cpu/intel/model_f3x/model_f3x_init.c b/src/cpu/intel/model_f3x/model_f3x_init.c
index 198490ff85..bcbfdcf658 100644
--- a/src/cpu/intel/model_f3x/model_f3x_init.c
+++ b/src/cpu/intel/model_f3x/model_f3x_init.c
@@ -2,7 +2,6 @@
 
 #include <cpu/cpu.h>
 #include <cpu/intel/common/common.h>
-#include <cpu/intel/hyperthreading.h>
 #include <cpu/intel/microcode.h>
 #include <cpu/x86/cache.h>
 #include <cpu/x86/mtrr.h>
@@ -12,19 +11,6 @@ static void model_f3x_init(struct device *cpu)
 {
 	/* Turn on caching if we haven't already */
 	enable_cache();
-
-	if (!CONFIG(PARALLEL_MP) && !intel_ht_sibling()) {
-		/* MTRRs are shared between threads */
-		x86_setup_mtrrs();
-		x86_mtrr_check();
-
-		/* Update the microcode */
-		intel_update_microcode_from_cbfs();
-	}
-
-	/* Start up my CPU siblings */
-	if (!CONFIG(PARALLEL_MP))
-		intel_sibling_init(cpu);
 };
 
 static struct device_operations cpu_dev_ops = {
diff --git a/src/cpu/x86/Kconfig.debug_cpu b/src/cpu/x86/Kconfig.debug_cpu
index 7edb60f445..8e0c3e4233 100644
--- a/src/cpu/x86/Kconfig.debug_cpu
+++ b/src/cpu/x86/Kconfig.debug_cpu
@@ -10,8 +10,4 @@ config DEBUG_CAR
 config DISPLAY_MTRRS
 	bool "Display intermediate MTRR settings"
 
-config DEBUG_SMM_RELOCATION
-	bool "Debug SMM relocation code"
-	depends on HAVE_SMI_HANDLER && SMM_ASEG
-
 endif # ARCH_X86
diff --git a/src/include/cpu/intel/hyperthreading.h b/src/include/cpu/intel/hyperthreading.h
deleted file mode 100644
index 0613aa114f..0000000000
--- a/src/include/cpu/intel/hyperthreading.h
+++ /dev/null
@@ -1,9 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-#ifndef CPU_INTEL_HYPERTHREADING_H
-#define CPU_INTEL_HYPERTHREADING_H
-
-struct device;
-void intel_sibling_init(struct device *cpu);
-
-#endif /* CPU_INTEL_HYPERTHREADING_H */
diff --git a/src/mainboard/emulation/qemu-i440fx/northbridge.c b/src/mainboard/emulation/qemu-i440fx/northbridge.c
index 957837ef23..56693c3578 100644
--- a/src/mainboard/emulation/qemu-i440fx/northbridge.c
+++ b/src/mainboard/emulation/qemu-i440fx/northbridge.c
@@ -254,45 +254,13 @@ void mp_init_cpus(struct bus *cpu_bus)
 
 static void cpu_bus_init(struct device *dev)
 {
-	if (CONFIG(PARALLEL_MP))
-		mp_cpu_bus_init(dev);
-	else
-		initialize_cpus(dev->link_list);
-}
-
-static void cpu_bus_scan(struct device *bus)
-{
-	unsigned int max_cpus = fw_cfg_max_cpus();
-	struct device *cpu;
-	int i;
-
-	if (max_cpus == 0)
-		return;
-	/*
-	 * Do not install more CPUs than supported by coreboot.
-	 * This will cause a buffer overflow where fixed arrays of CONFIG_MAX_CPUS
-	 * are used and might result in a boot failure.
-	 */
-	max_cpus = MIN(max_cpus, CONFIG_MAX_CPUS);
-
-	/*
-	 * TODO: This only handles the simple "qemu -smp $nr" case
-	 * correctly.  qemu also allows to specify the number of
-	 * cores, threads & sockets.
-	 */
-	printk(BIOS_INFO, "QEMU: max_cpus is %d\n", max_cpus);
-	for (i = 0; i < max_cpus; i++) {
-		cpu = add_cpu_device(bus->link_list, i, 1);
-		if (cpu)
-			set_cpu_topology(cpu, 1, 0, i, 0);
-	}
+	mp_cpu_bus_init(dev);
 }
 
 static struct device_operations cpu_bus_ops = {
 	.read_resources   = noop_read_resources,
 	.set_resources    = noop_set_resources,
 	.init             = cpu_bus_init,
-	.scan_bus         = cpu_bus_scan,
 };
 
 static void northbridge_enable(struct device *dev)