mirror of
https://github.com/linuxboot/heads.git
synced 2024-12-22 22:32:23 +00:00
81 lines
3.3 KiB
Diff
81 lines
3.3 KiB
Diff
|
From 7267021c2a36ecd92aafdad2cae9ecab09e7e20d Mon Sep 17 00:00:00 2001
|
||
|
|
From: Matt DeVillier <matt.devillier@gmail.com>
|
||
|
|
Date: Mon, 25 Jun 2018 14:40:53 -0500
|
||
|
|
Subject: [PATCH 3/3] soc/intel/skylake: Generate ACPI RMRR table
|
||
|
|
|
||
|
|
An ACPI RMRR table is requried for IOMMU to work properly with an
|
||
|
|
iGPU (without using passthrough mode), so create one along with the
|
||
|
|
DRHD DMAR table if the iGPU is present and enabled.
|
||
|
|
|
||
|
|
Test: build/boot google/chell and purism/librem13v2 with kernel
|
||
|
|
parameter 'intel_iommu=on' but without 'iommu=pt;' observe integrated
|
||
|
|
graphics functional without corruption.
|
||
|
|
|
||
|
|
Change-Id: I202fb3eb8618f99d41f3d1c5bbb83b2ec982aca4
|
||
|
|
Signed-off-by: Matt DeVillier <matt.devillier@gmail.com>
|
||
|
|
Reviewed-on: https://review.coreboot.org/27270
|
||
|
|
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
|
||
|
|
Reviewed-by: Nico Huber <nico.h@gmx.de>
|
||
|
|
Reviewed-by: Youness Alaoui <snifikino@gmail.com>
|
||
|
|
---
|
||
|
|
.../common/block/include/intelblocks/systemagent.h | 2 ++
|
||
|
|
.../intel/common/block/systemagent/systemagent_early.c | 2 +-
|
||
|
|
src/soc/intel/skylake/acpi.c | 10 +++++++++-
|
||
|
|
3 files changed, 12 insertions(+), 2 deletions(-)
|
||
|
|
|
||
|
|
diff --git a/src/soc/intel/common/block/include/intelblocks/systemagent.h b/src/soc/intel/common/block/include/intelblocks/systemagent.h
|
||
|
|
index a731b9cb0b..babf9cec95 100644
|
||
|
|
--- a/src/soc/intel/common/block/include/intelblocks/systemagent.h
|
||
|
|
+++ b/src/soc/intel/common/block/include/intelblocks/systemagent.h
|
||
|
|
@@ -77,6 +77,8 @@ void enable_power_aware_intr(void);
|
||
|
|
uintptr_t sa_get_tolud_base(void);
|
||
|
|
/* API to get DSM size */
|
||
|
|
size_t sa_get_dsm_size(void);
|
||
|
|
+/* API to get GSM base address */
|
||
|
|
+uintptr_t sa_get_gsm_base(void);
|
||
|
|
/* API to get GSM size */
|
||
|
|
size_t sa_get_gsm_size(void);
|
||
|
|
/* API to get TSEG base address */
|
||
|
|
diff --git a/src/soc/intel/common/block/systemagent/systemagent_early.c b/src/soc/intel/common/block/systemagent/systemagent_early.c
|
||
|
|
index 609e1596c9..c1cef5daf1 100644
|
||
|
|
--- a/src/soc/intel/common/block/systemagent/systemagent_early.c
|
||
|
|
+++ b/src/soc/intel/common/block/systemagent/systemagent_early.c
|
||
|
|
@@ -174,7 +174,7 @@ size_t sa_get_dsm_size(void)
|
||
|
|
return (prealloc_memory - 0xEF) * 4*MiB;
|
||
|
|
}
|
||
|
|
|
||
|
|
-static uintptr_t sa_get_gsm_base(void)
|
||
|
|
+uintptr_t sa_get_gsm_base(void)
|
||
|
|
{
|
||
|
|
/* All regions concerned for have 1 MiB alignment. */
|
||
|
|
return ALIGN_DOWN(pci_read_config32(SA_DEV_ROOT, BGSM), 1*MiB);
|
||
|
|
diff --git a/src/soc/intel/skylake/acpi.c b/src/soc/intel/skylake/acpi.c
|
||
|
|
index 760be590a3..eac9e0ac91 100644
|
||
|
|
--- a/src/soc/intel/skylake/acpi.c
|
||
|
|
+++ b/src/soc/intel/skylake/acpi.c
|
||
|
|
@@ -548,12 +548,20 @@ static unsigned long acpi_fill_dmar(unsigned long current)
|
||
|
|
/* iGFX has to be enabled, GFXVTBAR set and in 32-bit space. */
|
||
|
|
if (igfx_dev && igfx_dev->enabled && gfxvten &&
|
||
|
|
gfx_vtbar && !MCHBAR32(GFXVTBAR + 4)) {
|
||
|
|
- const unsigned long tmp = current;
|
||
|
|
+ unsigned long tmp = current;
|
||
|
|
|
||
|
|
current += acpi_create_dmar_drhd(current, 0, 0, gfx_vtbar);
|
||
|
|
current += acpi_create_dmar_ds_pci(current, 0, 2, 0);
|
||
|
|
|
||
|
|
acpi_dmar_drhd_fixup(tmp, current);
|
||
|
|
+
|
||
|
|
+ /* Add RMRR entry */
|
||
|
|
+ tmp = current;
|
||
|
|
+
|
||
|
|
+ current += acpi_create_dmar_rmrr(current, 0,
|
||
|
|
+ sa_get_gsm_base(), sa_get_tolud_base() - 1);
|
||
|
|
+ current += acpi_create_dmar_ds_pci(current, 0, 2, 0);
|
||
|
|
+ acpi_dmar_rmrr_fixup(tmp, current);
|
||
|
|
}
|
||
|
|
|
||
|
|
struct device *const p2sb_dev = dev_find_slot(0, PCH_DEVFN_P2SB);
|
||
|
|
--
|
||
|
|
2.19.1
|
||
|
|
|