From: John Garry <john.garry@huawei.com>
To: <joro@8bytes.org>, <will@kernel.org>, <dwmw2@infradead.org>,
<baolu.lu@linux.intel.com>, <robin.murphy@arm.com>,
<corbet@lwn.net>
Cc: dianders@chromium.org, linux-doc@vger.kernel.org,
linux-kernel@vger.kernel.org, linuxarm@huawei.com,
iommu@lists.linux-foundation.org
Subject: [PATCH v15 1/6] iommu: Deprecate Intel and AMD cmdline methods to enable strict mode
Date: Mon, 12 Jul 2021 19:12:15 +0800 [thread overview]
Message-ID: <1626088340-5838-2-git-send-email-john.garry@huawei.com> (raw)
In-Reply-To: <1626088340-5838-1-git-send-email-john.garry@huawei.com>
Now that the x86 drivers support iommu.strict, deprecate the custom
methods.
Signed-off-by: John Garry <john.garry@huawei.com>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
---
Documentation/admin-guide/kernel-parameters.txt | 9 ++-------
drivers/iommu/amd/init.c | 4 +++-
drivers/iommu/intel/iommu.c | 1 +
3 files changed, 6 insertions(+), 8 deletions(-)
diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index bdb22006f713..a04d2748c99a 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -290,10 +290,7 @@
amd_iommu= [HW,X86-64]
Pass parameters to the AMD IOMMU driver in the system.
Possible values are:
- fullflush - enable flushing of IO/TLB entries when
- they are unmapped. Otherwise they are
- flushed before they will be reused, which
- is a lot of faster
+ fullflush - Deprecated, equivalent to iommu.strict=1
off - do not initialize any AMD IOMMU found in
the system
force_isolation - Force device isolation for all
@@ -1944,9 +1941,7 @@
this case, gfx device will use physical address for
DMA.
strict [Default Off]
- With this option on every unmap_single operation will
- result in a hardware IOTLB flush operation as opposed
- to batching them for performance.
+ Deprecated, equivalent to iommu.strict=1.
sp_off [Default Off]
By default, super page will be supported if Intel IOMMU
has the capability. With this option, super page will
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c
index 46280e6e1535..3a2fb805f11e 100644
--- a/drivers/iommu/amd/init.c
+++ b/drivers/iommu/amd/init.c
@@ -3098,8 +3098,10 @@ static int __init parse_amd_iommu_intr(char *str)
static int __init parse_amd_iommu_options(char *str)
{
for (; *str; ++str) {
- if (strncmp(str, "fullflush", 9) == 0)
+ if (strncmp(str, "fullflush", 9) == 0) {
+ pr_warn("amd_iommu=fullflush deprecated; use iommu.strict=1 instead\n");
amd_iommu_unmap_flush = true;
+ }
if (strncmp(str, "force_enable", 12) == 0)
amd_iommu_force_enable = true;
if (strncmp(str, "off", 3) == 0)
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index a6a07d985709..67c52b60f8de 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -454,6 +454,7 @@ static int __init intel_iommu_setup(char *str)
pr_warn("intel_iommu=forcedac deprecated; use iommu.forcedac instead\n");
iommu_dma_forcedac = true;
} else if (!strncmp(str, "strict", 6)) {
+ pr_warn("intel_iommu=strict deprecated; use iommu.strict=1 instead\n");
pr_info("Disable batched IOTLB flush\n");
intel_iommu_strict = 1;
} else if (!strncmp(str, "sp_off", 6)) {
--
2.26.2
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2021-07-12 11:17 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-12 11:12 [PATCH v15 0/6] iommu: Enhance IOMMU default DMA mode build options John Garry
2021-07-12 11:12 ` John Garry [this message]
2021-07-12 11:12 ` [PATCH v15 2/6] iommu: Print strict or lazy mode at init time John Garry
2021-07-12 11:12 ` [PATCH v15 3/6] iommu: Enhance IOMMU default DMA mode build options John Garry
2021-07-12 11:12 ` [PATCH v15 4/6] iommu/vt-d: Add support for " John Garry
2021-07-12 11:12 ` [PATCH v15 5/6] iommu/amd: " John Garry
2021-07-12 11:12 ` [PATCH v15 6/6] iommu: Remove mode argument from iommu_set_dma_strict() John Garry
2021-07-26 11:28 ` [PATCH v15 0/6] iommu: Enhance IOMMU default DMA mode build options Joerg Roedel
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-all 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=1626088340-5838-2-git-send-email-john.garry@huawei.com \
--to=john.garry@huawei.com \
--cc=baolu.lu@linux.intel.com \
--cc=corbet@lwn.net \
--cc=dianders@chromium.org \
--cc=dwmw2@infradead.org \
--cc=iommu@lists.linux-foundation.org \
--cc=joro@8bytes.org \
--cc=linux-doc@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxarm@huawei.com \
--cc=robin.murphy@arm.com \
--cc=will@kernel.org \
/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;
as well as URLs for NNTP newsgroup(s).