soc/intel/xeon_sp: Call SMM finalize

Call the SMM finalize SMI. Adds SMM_FEATURE_CONTROL setting to enable
MCHK on code fetch outside SMRR and the register lock as recommended
by the BWG.

Change-Id: Ie3b58d35c7a62509e39e393514012d1055232d32
Signed-off-by: Marc Jones <marcjones@sysproconsulting.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/51651
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
Reviewed-by: Rocky Phagura
Reviewed-by: Jay Talbott <JayTalbott@sysproconsulting.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 17 insertions, 0 deletions

diff --git a/src/soc/intel/xeon_sp/finalize.c b/src/soc/intel/xeon_sp/finalize.c
new file mode 100644
index 0000000000..bfcf212558
--- /dev/null
+++ b/src/soc/intel/xeon_sp/finalize.c
@@ -0,0 +1,17 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <bootstate.h>
+#include <console/console.h>
+#include <console/debug.h>
+#include <cpu/x86/smm.h>
+
+static void soc_finalize(void *unused)
+{
+	printk(BIOS_DEBUG, "Finalizing chipset.\n");
+
+	apm_control(APM_CNT_FINALIZE);
+
+	post_code(POST_OS_BOOT);
+}
+
+BOOT_STATE_INIT_ENTRY(BS_PAYLOAD_LOAD, BS_ON_ENTRY, soc_finalize, NULL);