cpu/amd: Move locking SMM as part of SMM init

Locking SMM as part of the AP init avoids the need for
CONFIG_PARALLEL_MP_AP_WORK to lock it down.

Change-Id: Ibcdfc0f9ae211644cf0911790b0b0c5d1b0b7dc9
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/64871
Reviewed-by: Paul Menzel <paulepanter@mailbox.org>
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/amd/common/block/cpu/smm/finalize.c

@@ -10,30 +10,8 @@
 #include <cpu/x86/msr.h>
 #include <types.h>
 
-static void per_core_finalize(void *unused)
-{
-	/* Finalize SMM settings */
-	if (is_smm_locked()) /* Skip if already locked, avoid GPF */
-		return;
-
-	if (CONFIG(HAVE_SMI_HANDLER))
-		tseg_valid();
-
-	lock_smm();
-}
-
-static void finalize_cores(void)
-{
-	printk(BIOS_SPEW, "Lock SMM configuration\n");
-
-	if (mp_run_on_all_cpus(per_core_finalize, NULL) != CB_SUCCESS)
-		printk(BIOS_WARNING, "Failed to finalize all cores\n");
-}
-
 static void soc_finalize(void *unused)
 {
-	finalize_cores();
-
 	if (!acpi_is_wakeup_s3()) {
 		acpi_clear_pm_gpe_status();
 

src/soc/amd/common/block/cpu/smm/smm_helper.c

@@ -30,20 +30,6 @@ void clear_tvalid(void)
 	wrmsr(SMM_MASK_MSR, mask);
 }
 
-void tseg_valid(void)
-{
-	msr_t mask = rdmsr(SMM_MASK_MSR);
-	mask.lo |= SMM_TSEG_VALID;
-
-	wrmsr(SMM_MASK_MSR, mask);
-}
-
-bool is_smm_locked(void)
-{
-	msr_t hwcr = rdmsr(HWCR_MSR);
-	return hwcr.lo & SMM_LOCK ? true : false;
-}
-
 void lock_smm(void)
 {
 	msr_t hwcr = rdmsr(HWCR_MSR);

src/soc/amd/common/block/cpu/smm/smm_relocate.c

@@ -49,6 +49,14 @@ static void get_smm_info(uintptr_t *perm_smbase, size_t *perm_smsize,
 	*smm_save_state_size = sizeof(amd64_smm_state_save_area_t);
 }
 
+static void tseg_valid(void)
+{
+	msr_t mask = rdmsr(SMM_MASK_MSR);
+	mask.lo |= SMM_TSEG_VALID;
+
+	wrmsr(SMM_MASK_MSR, mask);
+}
+
 static void smm_relocation_handler(int cpu, uintptr_t curr_smbase, uintptr_t staggered_smbase)
 {
 	amd64_smm_state_save_area_t *smm_state;
@@ -70,6 +78,9 @@ static void smm_relocation_handler(int cpu, uintptr_t curr_smbase, uintptr_t sta
 
 	smm_state = (void *)(SMM_AMD64_SAVE_STATE_OFFSET + curr_smbase);
 	smm_state->smbase = staggered_smbase;
+
+	tseg_valid();
+	lock_smm();
 }
 
 const struct mp_ops amd_mp_ops_with_smm = {

src/soc/amd/common/block/include/amdblocks/smm.h

@@ -10,8 +10,6 @@ void *get_smi_source_handler(int source);
 void handle_smi_gsmi(void);
 void handle_smi_store(void);
 void clear_tvalid(void);
-void tseg_valid(void);
-bool is_smm_locked(void);
 void lock_smm(void);
 /* See SMITYPE_* for list possible of events. GEVENTS are handled with mainboard_smi_gpi. */
 void mainboard_handle_smi(int event);