[coreboot-gerrit] Change in coreboot[master]: mb/ocp/deltalake: Implement skipping TXT lockdown via VPD

[Arthur Heymans (Code Review)]

Attention is currently required from: Anjaneya "Reddy" Chagam, Jonathan Zhang, Johnny Lin, Morgan Jang.
Arthur Heymans has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/50237 )

Change subject: mb/ocp/deltalake: Implement skipping TXT lockdown via VPD
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mb/ocp/deltalake: Implement skipping TXT lockdown via VPD

This allows to skip TXT Lockdown via "skip_intel_txt" VPD parameter.

Change-Id: Ic5daf96bdda9c36054c410b07b08bcd3482d777c
Signed-off-by: Arthur Heymans 
---
M src/mainboard/ocp/deltalake/ramstage.c
M src/mainboard/ocp/deltalake/vpd.h
2 files changed, 23 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/37/50237/1

diff --git a/src/mainboard/ocp/deltalake/ramstage.c b/src/mainboard/ocp/deltalake/ramstage.c
index 40810b6..7341e99 100644
--- a/src/mainboard/ocp/deltalake/ramstage.c
+++ b/src/mainboard/ocp/deltalake/ramstage.c
@@ -5,6 +5,8 @@
 #include <bootstate.h>
 #include <drivers/ipmi/ipmi_ops.h>
 #include <drivers/ocp/dmi/ocp_dmi.h>
+#include <drivers/vpd/vpd.h>
+#include <security/intel/txt/txt.h>
 #include <soc/ramstage.h>
 #include <soc/soc_util.h>
 #include <stdio.h>
@@ -18,6 +20,7 @@
 #include <cpxsp_dl_gpio.h>

#include "ipmi.h"
+#include "vpd.h"

#define SLOT_ID_LEN 2

@@ -359,3 +362,19 @@
    .enable_dev = mainboard_enable,
    .final = mainboard_final,
 };
+
+bool skip_intel_txt(void)
+{
+	static bool fetched_vpd = 0;
+	static uint8_t skip_txt = SKIP_INTEL_TXT_DEFAULT;
+
+	if (fetched_vpd)
+		return (bool)skip_txt;
+
+	if (!vpd_get_bool(SKIP_INTEL_TXT, VPD_RW_THEN_RO, &skip_txt))
+		printk(BIOS_INFO, "Not able to get VPD %s, default set to %d\n",
+		       SKIP_INTEL_TXT, SKIP_INTEL_TXT_DEFAULT);
+	fetched_vpd = 1;
+
+	return (bool)skip_txt;
+}
diff --git a/src/mainboard/ocp/deltalake/vpd.h b/src/mainboard/ocp/deltalake/vpd.h
index 82989ff..ca47010 100644
--- a/src/mainboard/ocp/deltalake/vpd.h
+++ b/src/mainboard/ocp/deltalake/vpd.h
@@ -37,4 +37,8 @@
 #define FSPM_MEMREFRESHWATERMARK "fspm_mem_refresh_watermark"
 #define FSPM_MEMREFRESHWATERMARK_DEFAULT 1

+/* Skip TXT lockdown */
+#define SKIP_INTEL_TXT "skip_intel_txt"
+#define SKIP_INTEL_TXT_DEFAULT 0
+
 #endif