[coreboot-gerrit] Change in coreboot[master]: soc/intel/xeon_sp: Set PCIE secure register lock

[Marc Jones (Code Review)]

Attention is currently required from: Patrick Rudolph.
Marc Jones has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/52164 )

Change subject: soc/intel/xeon_sp: Set PCIE secure register lock
......................................................................

soc/intel/xeon_sp: Set PCIE secure register lock

Set PCIE SRL as indicated by the Intel documentation.

Change-Id: Ifa5bfb2824477b76ba34c3dc0588311f6c320092
Signed-off-by: Marc Jones 
---
M src/soc/intel/xeon_sp/include/soc/pch_pci_devs.h
M src/soc/intel/xeon_sp/lockdown.c
2 files changed, 13 insertions(+), 0 deletions(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/64/52164/1

diff --git a/src/soc/intel/xeon_sp/include/soc/pch_pci_devs.h b/src/soc/intel/xeon_sp/include/soc/pch_pci_devs.h
index de7a73a..aff336b 100644
--- a/src/soc/intel/xeon_sp/include/soc/pch_pci_devs.h
+++ b/src/soc/intel/xeon_sp/include/soc/pch_pci_devs.h
@@ -42,6 +42,12 @@
 #define    SATAGC		0x9c
 #define      SATAGC_REGLOCK	BIT(31)

+#define PCH_DEV_SLOT_PCIE	0x1d
+#define  PCH_DEVFN_PCIE		_PCH_DEVFN(PCIE, 0)
+#define  PCH_DEV_PCIE		_PCH_DEV(PCIE, 0)
+#define     PCIE_MPC		0xd8
+#define       SRL		BIT(23)
+
 #define PCH_DEV_SLOT_LPC	0x1f
 #define  PCH_DEVFN_LPC		_PCH_DEVFN(LPC, 0)
 #define  PCH_DEVFN_P2SB		_PCH_DEVFN(LPC, 1)
diff --git a/src/soc/intel/xeon_sp/lockdown.c b/src/soc/intel/xeon_sp/lockdown.c
index 0f032fc..d8c9b6a 100644
--- a/src/soc/intel/xeon_sp/lockdown.c
+++ b/src/soc/intel/xeon_sp/lockdown.c
@@ -44,9 +44,16 @@
    }
 }

+static void pcie_lockdown_config(int chipset_lockdown)
+{
+	if (chipset_lockdown == CHIPSET_LOCKDOWN_COREBOOT)
+		pci_or_config32(PCH_DEV_PCIE, PCIE_MPC, SRL);
+}
+
 void soc_lockdown_config(int chipset_lockdown)
 {
    lpc_lockdown_config(chipset_lockdown);
    pmc_lockdown_config(chipset_lockdown);
    sata_lockdown_config(chipset_lockdown);
+	pcie_lockdown_config(chipset_lockdown);
 }