From db3f0e3ebd8364d3cd46130743f38ff8425299f8 Mon Sep 17 00:00:00 2001
From: John Zhao <john.zhao@intel.com>
Date: Fri, 15 Mar 2019 16:54:27 -0700
Subject: soc/intel/cnl: Generate DMAR ACPI table

The platform supports Virtualization Technology for Directed I/O.
Generate DMAR acpi table if VT-d feature is enabled.

BUG=b:130351429
TEST=Booted to kernel and verified the DMAR table contents.

Change-Id: I4e1ee5244c67affb13947436d81628c5dc665c9e
Signed-off-by: John Zhao <john.zhao@intel.com>
Signed-off-by: Pratik Prajapati <pratikkumar.v.prajapati@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31917
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Nico Huber <nico.h@gmx.de>
Reviewed-by: Furquan Shaikh <furquan@google.com>
Reviewed-by: Lijian Zhao <lijian.zhao@intel.com>
---
 src/soc/intel/cannonlake/systemagent.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'src/soc/intel/cannonlake/systemagent.c')

diff --git a/src/soc/intel/cannonlake/systemagent.c b/src/soc/intel/cannonlake/systemagent.c
index 9c8d761648..d850b15b34 100644
--- a/src/soc/intel/cannonlake/systemagent.c
+++ b/src/soc/intel/cannonlake/systemagent.c
@@ -18,10 +18,12 @@
 #include <device/device.h>
 #include <delay.h>
 #include <device/pci.h>
+#include <device/pci_ops.h>
 #include <intelblocks/systemagent.h>
 #include <soc/cpu.h>
 #include <soc/iomap.h>
 #include <soc/systemagent.h>
+#include "chip.h"
 
 /*
  * SoC implementation
@@ -31,6 +33,8 @@
  */
 void soc_add_fixed_mmio_resources(struct device *dev, int *index)
 {
+	const struct soc_intel_cannonlake_config *const config = dev->chip_info;
+
 	static const struct sa_mmio_descriptor soc_fixed_resources[] = {
 		{ PCIEXBAR, CONFIG_MMCONF_BASE_ADDRESS, CONFIG_SA_PCIEX_LENGTH,
 				"PCIEXBAR" },
@@ -54,6 +58,15 @@ void soc_add_fixed_mmio_resources(struct device *dev, int *index)
 
 	sa_add_fixed_mmio_resources(dev, index, soc_fixed_resources,
 			ARRAY_SIZE(soc_fixed_resources));
+
+	/* Add Vt-d resources if VT-d is enabled. */
+	if ((pci_read_config32(dev, CAPID0_A) & VTD_DISABLE))
+		return;
+
+	if (!(config && config->VtdDisable)) {
+		sa_add_fixed_mmio_resources(dev, index, soc_vtd_resources,
+			ARRAY_SIZE(soc_vtd_resources));
+	}
 }
 
 /*
-- 
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