cpu/x86/smm: Move apic_id_to_cpu map to smm_stub params

This is only consumed by the stub and not by the relocation handler or
the permanent handler, so move it out of the runtime struct.

Change-Id: I01ed0a412c23c8a82d88408be058a27e55d0dc4d
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/50762
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>

src/cpu/x86/mp_init.c

@@ -762,10 +762,10 @@ static void asmlinkage smm_do_relocation(void *arg)
 static void adjust_smm_apic_id_map(struct smm_loader_params *smm_params)
 {
 	int i;
-	struct smm_runtime *runtime = smm_params->runtime;
+	struct smm_stub_params *stub_params = smm_params->stub_params;
 
 	for (i = 0; i < CONFIG_MAX_CPUS; i++)
-		runtime->apic_id_to_cpu[i] = cpu_get_apic_id(i);
+		stub_params->apic_id_to_cpu[i] = cpu_get_apic_id(i);
 }
 
 static int install_relocation_handler(int num_cpus, size_t save_state_size)

src/cpu/x86/smm/smm_module_loader.c

@@ -259,9 +259,10 @@ static int smm_module_setup_stub(void *smbase, size_t smm_size,
 
 	/* Initialize the APIC id to CPU number table to be 1:1 */
 	for (i = 0; i < params->num_concurrent_stacks; i++)
-		stub_params->runtime.apic_id_to_cpu[i] = i;
+		stub_params->apic_id_to_cpu[i] = i;
 
 	/* Allow the initiator to manipulate SMM stub parameters. */
+	params->stub_params = stub_params;
 	params->runtime = &stub_params->runtime;
 
 	printk(BIOS_DEBUG, "SMM Module: stub loaded at %p. Will call %p\n",

src/cpu/x86/smm/smm_module_loaderv2.c

@@ -464,9 +464,10 @@ static int smm_module_setup_stub(void *smbase, size_t smm_size,
 
 	/* Initialize the APIC id to CPU number table to be 1:1 */
 	for (i = 0; i < params->num_concurrent_stacks; i++)
-		stub_params->runtime.apic_id_to_cpu[i] = i;
+		stub_params->apic_id_to_cpu[i] = i;
 
 	/* Allow the initiator to manipulate SMM stub parameters. */
+	params->stub_params = stub_params;
 	params->runtime = &stub_params->runtime;
 
 	printk(BIOS_DEBUG, "SMM Module: stub loaded at %p. Will call %p\n",

src/cpu/x86/smm/smm_stub.S

@@ -25,6 +25,12 @@ fxsave_area:
 .long 0
 fxsave_area_size:
 .long 0
+/* apic_to_cpu_num is a table mapping the default APIC id to CPU num. If the
+ * APIC id is found at the given index, the contiguous CPU number is index
+ * into the table. */
+apic_to_cpu_num:
+.fill CONFIG_MAX_CPUS,1,0xff
+
 /* struct smm_runtime begins here. */
 smm_runtime:
 smbase:
@@ -40,11 +46,6 @@ gnvs_ptr:
 /* allows the STM to bring up SMM in 32-bit mode */
 start32_offset:
 .long smm_trampoline32 - _start
-/* apic_to_cpu_num is a table mapping the default APIC id to CPU num. If the
- * APIC id is found at the given index, the contiguous CPU number is index
- * into the table. */
-apic_to_cpu_num:
-.fill CONFIG_MAX_CPUS,1,0xff
 /* end struct smm_runtime */
 
 .data

src/include/cpu/x86/smm.h

@@ -62,13 +62,6 @@ struct smm_runtime {
 	u32 gnvs_ptr;
 	/* STM's 32bit entry into SMI handler */
 	u32 start32_offset;
-	/* The apic_id_to_cpu provides a mapping from APIC id to CPU number.
-	 * The CPU number is indicated by the index into the array by matching
-	 * the default APIC id and value at the index. The stub loader
-	 * initializes this array with a 1:1 mapping. If the APIC ids are not
-	 * contiguous like the 1:1 mapping it is up to the caller of the stub
-	 * loader to adjust this mapping. */
-	u8 apic_id_to_cpu[CONFIG_MAX_CPUS];
 } __packed;
 
 struct smm_module_params {
@@ -88,6 +81,13 @@ struct smm_stub_params {
 	u32 c_handler;
 	u32 fxsave_area;
 	u32 fxsave_area_size;
+	/* The apic_id_to_cpu provides a mapping from APIC id to CPU number.
+	 * The CPU number is indicated by the index into the array by matching
+	 * the default APIC id and value at the index. The stub loader
+	 * initializes this array with a 1:1 mapping. If the APIC ids are not
+	 * contiguous like the 1:1 mapping it is up to the caller of the stub
+	 * loader to adjust this mapping. */
+	u8 apic_id_to_cpu[CONFIG_MAX_CPUS];
 	struct smm_runtime runtime;
 } __packed;
 
@@ -150,6 +150,7 @@ struct smm_loader_params {
 
 	smm_handler_t handler;
 
+	struct smm_stub_params *stub_params;
 	struct smm_runtime *runtime;
 
 	/* The following are only used by X86_SMM_LOADER_VERSION2 */