From: Lu Baolu <baolu.lu@linux.intel.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: Will Deacon <will@kernel.org>, Yian Chen <yian.chen@intel.com>,
Ashok Raj <ashok.raj@intel.com>,
iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org,
Lu Baolu <baolu.lu@linux.intel.com>
Subject: [PATCH v2 1/3] iommu/vt-d: Add new enum value and structure for SATC
Date: Wed, 3 Feb 2021 17:33:26 +0800 [thread overview]
Message-ID: <20210203093329.1617808-2-baolu.lu@linux.intel.com> (raw)
In-Reply-To: <20210203093329.1617808-1-baolu.lu@linux.intel.com>
From: Yian Chen <yian.chen@intel.com>
Starting from Intel Platform VT-d v3.2, BIOS may provide new remapping
structure SATC for SOC integrated devices, according to section 8.8 of
Intel VT-d architecture specification v3.2. The SATC structure reports
a list of the devices that require ATS for normal device operation. It
is a functional requirement that these devices will not work without OS
enabling ATS capability.
This patch introduces the new enum value and structure to represent the
remapping information. Kernel should parse the information from the
reporting structure and enable ATC for the devices as needed.
Signed-off-by: Yian Chen <yian.chen@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
---
include/acpi/actbl1.h | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/include/acpi/actbl1.h b/include/acpi/actbl1.h
index 43549547ed3e..c38e08cf1b9e 100644
--- a/include/acpi/actbl1.h
+++ b/include/acpi/actbl1.h
@@ -514,7 +514,8 @@ enum acpi_dmar_type {
ACPI_DMAR_TYPE_ROOT_ATS = 2,
ACPI_DMAR_TYPE_HARDWARE_AFFINITY = 3,
ACPI_DMAR_TYPE_NAMESPACE = 4,
- ACPI_DMAR_TYPE_RESERVED = 5 /* 5 and greater are reserved */
+ ACPI_DMAR_TYPE_SATC = 5,
+ ACPI_DMAR_TYPE_RESERVED = 6 /* 6 and greater are reserved */
};
/* DMAR Device Scope structure */
@@ -607,6 +608,14 @@ struct acpi_dmar_andd {
char device_name[1];
};
+/* 5: SOC Integrated Address Translation Cache Reporting Structure */
+
+struct acpi_dmar_satc {
+ struct acpi_dmar_header header;
+ u8 flags;
+ u8 reserved;
+ u16 segment;
+};
/*******************************************************************************
*
* DRTM - Dynamic Root of Trust for Measurement table
--
2.25.1
next prev parent reply other threads:[~2021-02-03 9:44 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-03 9:33 [PATCH v2 0/3] iommu/vt-d: Add support for ACPI/SATC table Lu Baolu
2021-02-03 9:33 ` Lu Baolu [this message]
2021-02-03 9:33 ` [PATCH v2 2/3] iommu/vt-d: Parse SATC reporting structure Lu Baolu
2021-02-03 9:33 ` [PATCH v2 3/3] iommu/vt-d: Apply SATC policy Lu Baolu
2021-02-04 1:59 ` Tian, Kevin
2021-02-04 2:13 ` Lu Baolu
2021-02-03 9:48 ` [PATCH v2 0/3] iommu/vt-d: Add support for ACPI/SATC table Lu Baolu
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