From: "Vivek Kumar Gautam" <vivek.gautam@arm.com>
To: devel@edk2.groups.io
Cc: ardb+tianocore@kernel.org, leif@nuviainc.com,
Sami.Mujawar@arm.com, Vivek.Gautam@arm.com
Subject: [edk2-platforms][PATCH V2 2/2] Platform/Sgi: Enable ATS mode over PCI root complex
Date: Fri, 5 Mar 2021 18:44:19 +0530 [thread overview]
Message-ID: <20210305131419.24069-3-vivek.gautam@arm.com> (raw)
In-Reply-To: <20210305131419.24069-1-vivek.gautam@arm.com>
Enable Address Translation Service (ATS) support for the PCI root
complex listed in the iort table.
ATS allows PCIe devices to request an address translation before
starting the dma transaction, so that devices can cache these
translations in their private cache that is called as Address
Translation Cache (ATC).
Devices that support Page Request Interface (PRI) can also enable
the feature when ATS is enabled as ATS is a prerequisite for PRI.
Signed-off-by: Vivek Gautam <vivek.gautam@arm.com>
---
Platform/ARM/SgiPkg/AcpiTables/Iort.aslc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/Platform/ARM/SgiPkg/AcpiTables/Iort.aslc b/Platform/ARM/SgiPkg/AcpiTables/Iort.aslc
index ce8eefc585ea..fcc28a71c82e 100644
--- a/Platform/ARM/SgiPkg/AcpiTables/Iort.aslc
+++ b/Platform/ARM/SgiPkg/AcpiTables/Iort.aslc
@@ -133,7 +133,7 @@ ARM_EFI_ACPI_6_0_IO_REMAPPING_TABLE Iort =
0, // AllocationHints
0, // Reserved
0, // MemoryAccessFlags
- EFI_ACPI_IORT_ROOT_COMPLEX_ATS_UNSUPPORTED, // AtsAttribute
+ EFI_ACPI_IORT_ROOT_COMPLEX_ATS_SUPPORTED, // AtsAttribute
0x0, // PciSegmentNumber
},
// EFI_ACPI_6_0_IO_REMAPPING_ID_TABLE
--
2.17.1
prev parent reply other threads:[~2021-03-05 13:14 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-05 13:14 [edk2-platforms][PATCH V2 0/2] Enable SMMUv3 for Arm SGI/RD platforms Vivek Kumar Gautam
2021-03-05 13:14 ` [edk2-platforms][PATCH V2 1/2] Platform/Sgi: Add smmu-v3 node in the iort acpi table Vivek Kumar Gautam
2021-03-05 13:14 ` Vivek Kumar Gautam [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-list from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210305131419.24069-3-vivek.gautam@arm.com \
--to=devel@edk2.groups.io \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox