patches/coreboot-4.17: Add Librem 4.17 patches

Add patches for coreboot 4.17:
- show ME status even when device is disable (kept from 4.15)
- zero unused part of SMBIOS region

Signed-off-by: Daniel Pineda <daniel.pineda@puri.sm>

patches/coreboot-4.17/0001-soc-skylake-me.c-Print-status-regardless-of-device-e.patch

@@ -0,0 +1,36 @@
+From 74c443f9474245c28edddc0847d89ea4c82ba0b2 Mon Sep 17 00:00:00 2001
+From: Matt DeVillier <matt.devillier@puri.sm>
+Date: Mon, 18 May 2020 14:02:27 -0500
+Subject: [PATCH 1/3] soc/skylake/me.c: Print status regardless of device
+ enable state
+
+Checking the CSE device status before printing means it will skip
+printing for devices with the ME disabled, leaving the user no easy
+way to verify the ME is properly disabled. Remove the check.
+
+Test: build/boot Librem 13v4, verify ME status printed as expected
+on device with disabled/neutered ME.
+
+Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
+Change-Id: Iaa4f4a369d878a52136c3479027443ea4e731a36
+---
+ src/soc/intel/skylake/me.c | 3 ---
+ 1 file changed, 3 deletions(-)
+
+diff --git a/src/soc/intel/skylake/me.c b/src/soc/intel/skylake/me.c
+index 89491f89c3..08aceb3f83 100644
+--- a/src/soc/intel/skylake/me.c
++++ b/src/soc/intel/skylake/me.c
+@@ -188,9 +188,6 @@ void intel_me_status(void)
+ 	union me_hfsts3 hfs3;
+ 	union me_hfsts6 hfs6;
+ 
+-	if (!is_cse_enabled())
+-		return;
+-
+ 	hfs1.data = me_read_config32(PCI_ME_HFSTS1);
+ 	hfs2.data = me_read_config32(PCI_ME_HFSTS2);
+ 	hfs3.data = me_read_config32(PCI_ME_HFSTS3);
+-- 
+2.25.1
+

patches/coreboot-4.17/0002-soc-cannonlake-me.c-Print-status-regardless-of-devic.patch

@@ -0,0 +1,36 @@
+From 5d905d79d5c6ac8fc8814d0baea1522f50ed48f9 Mon Sep 17 00:00:00 2001
+From: Matt DeVillier <matt.devillier@puri.sm>
+Date: Fri, 19 Jun 2020 17:02:22 -0500
+Subject: [PATCH 2/3] soc/cannonlake/me.c: Print status regardless of device
+ enable state
+
+Checking the CSE device status before printing means it will skip
+printing for devices with the ME disabled, leaving the user no easy
+way to verify the ME is properly disabled. Remove the check.
+
+Test: build/boot Librem Mini, verify ME status printed as expected
+on device with disabled/neutered ME.
+
+Change-Id: I939333199aa699039fec727beb094e4eb2ad7149
+Signed-off-by: Matt DeVillier <matt.devillier@puri.sm>
+---
+ src/soc/intel/cannonlake/me.c | 3 ---
+ 1 file changed, 3 deletions(-)
+
+diff --git a/src/soc/intel/cannonlake/me.c b/src/soc/intel/cannonlake/me.c
+index 7bbe1ae730..4fe5a96ade 100644
+--- a/src/soc/intel/cannonlake/me.c
++++ b/src/soc/intel/cannonlake/me.c
+@@ -103,9 +103,6 @@ void dump_me_status(void *unused)
+ 	union me_hfsts5 hfsts5;
+ 	union me_hfsts6 hfsts6;
+ 
+-	if (!is_cse_enabled())
+-		return;
+-
+ 	hfsts1.data = me_read_config32(PCI_ME_HFSTS1);
+ 	hfsts2.data = me_read_config32(PCI_ME_HFSTS2);
+ 	hfsts3.data = me_read_config32(PCI_ME_HFSTS3);
+-- 
+2.25.1
+

patches/coreboot-4.17/0003-x86-Zero-unused-part-of-SMBIOS-region.patch

@@ -0,0 +1,34 @@
+From 517c2ad54bfc44b984457ca30c34410487eb2be9 Mon Sep 17 00:00:00 2001
+From: Jonathon Hall <jonathon.hall@puri.sm>
+Date: Wed, 27 Jul 2022 09:45:40 -0400
+Subject: [PATCH 3/3] x86: Zero unused part of SMBIOS region
+
+Since SMBIOS was increased from 4K to 32K, the unused region could include
+parts of the ACPI region from a prior boot, which may confuse the OS if it
+finds remanent table signatures.
+
+Change-Id: I0ebac7c70a6887c6d3380702d242618e86e84185
+Signed-off-by: Jonathon Hall <jonathon.hall@puri.sm>
+---
+ src/arch/x86/tables.c | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/src/arch/x86/tables.c b/src/arch/x86/tables.c
+index 8d2f7b6f20..282dfc58a8 100644
+--- a/src/arch/x86/tables.c
++++ b/src/arch/x86/tables.c
+@@ -151,6 +151,11 @@ static unsigned long write_smbios_table(unsigned long rom_table_end)
+ 
+ 		new_high_table_pointer =
+ 			smbios_write_tables(high_table_pointer);
++		/* Clear the unused part of the region, in case other table
++		 * signatures could be present from a prior boot
++		 */
++		memset((void *)new_high_table_pointer, 0, high_table_pointer +
++			MAX_SMBIOS_SIZE - new_high_table_pointer);
+ 		rom_table_end = ALIGN_UP(rom_table_end, 16);
+ 		memcpy((void *)rom_table_end, (void *)high_table_pointer,
+ 			sizeof(struct smbios_entry));
+-- 
+2.25.1
+