[coreboot-gerrit] Change in coreboot[master]: soc/intel/fsp_broadwell_de: Add fixed VT-d MMIO range to the resources
Philipp Deppenwiese (Code Review)
gerrit at coreboot.org
Thu Sep 20 14:38:52 CEST 2018
Philipp Deppenwiese has submitted this change and it was merged. ( https://review.coreboot.org/28672 )
Change subject: soc/intel/fsp_broadwell_de: Add fixed VT-d MMIO range to the resources
......................................................................
soc/intel/fsp_broadwell_de: Add fixed VT-d MMIO range to the resources
FSP initializes the VT-d feature on Broadwell-DE and assigns an address
space to the MMIO range. coreboot's resource allocator needs to be aware
of this fixed resource as otherwise the address can be assigned to a
different PCI device. In this case addresses are overlapped and the VT-d
range is not accessible any more.
To deal with it the right way add a fixed MMIO resource to the resources
list if VT-d BAR is enabled.
TEST=Booted into Linux and checked coreboot log for resource assignment.
Change-Id: I626ac17420eadc0b49031e850f0f40b3b221a098
Signed-off-by: Werner Zeh <werner.zeh at siemens.com>
Reviewed-on: https://review.coreboot.org/28672
Tested-by: build bot (Jenkins) <no-reply at coreboot.org>
Reviewed-by: Nico Huber <nico.h at gmx.de>
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki at gmail.com>
---
M src/soc/intel/fsp_broadwell_de/include/soc/broadwell_de.h
M src/soc/intel/fsp_broadwell_de/vtd.c
2 files changed, 17 insertions(+), 2 deletions(-)
Approvals:
build bot (Jenkins): Verified
Nico Huber: Looks good to me, approved
Philipp Deppenwiese: Looks good to me, approved
diff --git a/src/soc/intel/fsp_broadwell_de/include/soc/broadwell_de.h b/src/soc/intel/fsp_broadwell_de/include/soc/broadwell_de.h
index 50a4022..edfeafc 100644
--- a/src/soc/intel/fsp_broadwell_de/include/soc/broadwell_de.h
+++ b/src/soc/intel/fsp_broadwell_de/include/soc/broadwell_de.h
@@ -3,7 +3,7 @@
*
* Copyright (C) 2013 Google, Inc.
* Copyright (C) 2015-2016 Intel Corp.
- * Copyright (C) 2017 Siemens AG
+ * Copyright (C) 2017-2018 Siemens AG
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
@@ -21,6 +21,7 @@
#define VTBAR_OFFSET 0x180
#define VTBAR_MASK 0xffffe000
#define VTBAR_ENABLED 0x01
+#define VTBAR_SIZE 0x2000
#define SMM_FEATURE_CONTROL 0x58
#define SMM_CPU_SAVE_EN (1 << 1)
diff --git a/src/soc/intel/fsp_broadwell_de/vtd.c b/src/soc/intel/fsp_broadwell_de/vtd.c
index ad4a056..e584cfa 100644
--- a/src/soc/intel/fsp_broadwell_de/vtd.c
+++ b/src/soc/intel/fsp_broadwell_de/vtd.c
@@ -17,10 +17,24 @@
#include <device/pci_ids.h>
#include <soc/pci_devs.h>
#include <soc/acpi.h>
+#include <soc/broadwell_de.h>
+static void vtd_read_resources(struct device *dev)
+{
+ uint32_t vtbar;
+
+ /* Add fixed MMIO resource for VT-d which was set up by the FSP. */
+ vtbar = pci_read_config32(dev, VTBAR_OFFSET);
+ if (vtbar & VTBAR_ENABLED) {
+ mmio_resource(dev, VTBAR_OFFSET,
+ (vtbar & VTBAR_MASK) / KiB, VTBAR_SIZE / KiB);
+ }
+}
+
static struct device_operations vtd_ops = {
- .write_acpi_tables = vtd_write_acpi_tables,
+ .read_resources = vtd_read_resources,
+ .write_acpi_tables = vtd_write_acpi_tables,
};
static const struct pci_driver vtd_driver __pci_driver = {
--
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Gerrit-Project: coreboot
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I626ac17420eadc0b49031e850f0f40b3b221a098
Gerrit-Change-Number: 28672
Gerrit-PatchSet: 5
Gerrit-Owner: Werner Zeh <werner.zeh at siemens.com>
Gerrit-Reviewer: Aaron Durbin <adurbin at chromium.org>
Gerrit-Reviewer: David Hendricks <david.hendricks at gmail.com>
Gerrit-Reviewer: Mario Scheithauer <mario.scheithauer at siemens.com>
Gerrit-Reviewer: Nico Huber <nico.h at gmx.de>
Gerrit-Reviewer: Patrick Rudolph <patrick.rudolph at 9elements.com>
Gerrit-Reviewer: Paul Menzel <paulepanter at users.sourceforge.net>
Gerrit-Reviewer: Philipp Deppenwiese <zaolin.daisuki at gmail.com>
Gerrit-Reviewer: Werner Zeh <werner.zeh at siemens.com>
Gerrit-Reviewer: build bot (Jenkins) <no-reply at coreboot.org>
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