From: Keqian Zhu <zhukeqian1@huawei.com>
To: <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<iommu@lists.linux-foundation.org>,
Alex Williamson <alex.williamson@redhat.com>,
Robin Murphy <robin.murphy@arm.com>,
Yi Sun <yi.y.sun@linux.intel.com>, Will Deacon <will@kernel.org>
Cc: Kirti Wankhede <kwankhede@nvidia.com>,
Cornelia Huck <cohuck@redhat.com>, Marc Zyngier <maz@kernel.org>,
Catalin Marinas <catalin.marinas@arm.com>,
Mark Rutland <mark.rutland@arm.com>,
James Morse <james.morse@arm.com>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
<wanghaibin.wang@huawei.com>, <jiangkunkun@huawei.com>,
<yuzenghui@huawei.com>, <lushenming@huawei.com>
Subject: [PATCH v2 08/11] iommu/arm-smmu-v3: Add HWDBM device feature reporting
Date: Wed, 10 Mar 2021 17:06:11 +0800 [thread overview]
Message-ID: <20210310090614.26668-9-zhukeqian1@huawei.com> (raw)
In-Reply-To: <20210310090614.26668-1-zhukeqian1@huawei.com>
From: jiangkunkun <jiangkunkun@huawei.com>
We have implemented these interfaces required to support iommu
dirty log tracking. The last step is reporting this feature to
upper user, then the user can perform higher policy base on it.
This adds a new dev feature named IOMMU_DEV_FEAT_HWDBM in iommu
layer. For arm smmuv3, it is equal to ARM_SMMU_FEAT_HD and it is
enabled by default if supported. Other types of IOMMU can enable
it by default or when dev_enable_feature() is called.
Co-developed-by: Keqian Zhu <zhukeqian1@huawei.com>
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
---
changelog:
v2:
- As dev_has_feature() has been removed from iommu layer, IOMMU_DEV_FEAT_HWDBM
is designed to be used through "enable" interface.
---
drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 4 ++++
include/linux/iommu.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
index 696df51a3282..cd1627123e80 100644
--- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
+++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c
@@ -2722,6 +2722,8 @@ static bool arm_smmu_dev_has_feature(struct device *dev,
switch (feat) {
case IOMMU_DEV_FEAT_SVA:
return arm_smmu_master_sva_supported(master);
+ case IOMMU_DEV_FEAT_HWDBM:
+ return !!(master->smmu->features & ARM_SMMU_FEAT_HD);
default:
return false;
}
@@ -2738,6 +2740,8 @@ static bool arm_smmu_dev_feature_enabled(struct device *dev,
switch (feat) {
case IOMMU_DEV_FEAT_SVA:
return arm_smmu_master_sva_enabled(master);
+ case IOMMU_DEV_FEAT_HWDBM:
+ return arm_smmu_dev_has_feature(dev, feat);
default:
return false;
}
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 4f7db5d23b23..88584a2d027c 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -160,6 +160,7 @@ struct iommu_resv_region {
enum iommu_dev_features {
IOMMU_DEV_FEAT_AUX, /* Aux-domain feature */
IOMMU_DEV_FEAT_SVA, /* Shared Virtual Addresses */
+ IOMMU_DEV_FEAT_HWDBM, /* Hardware Dirty Bit Management */
};
#define IOMMU_PASID_INVALID (-1U)
--
2.19.1
next prev parent reply other threads:[~2021-03-10 9:07 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-10 9:06 [PATCH v2 00/11] vfio/iommu_type1: Implement dirty log tracking based on smmuv3 HTTU Keqian Zhu
2021-03-10 9:06 ` [PATCH v2 01/11] iommu/arm-smmu-v3: Add support for Hardware Translation Table Update Keqian Zhu
2021-03-10 9:06 ` [PATCH v2 02/11] iommu/arm-smmu-v3: Enable HTTU for stage1 with io-pgtable mapping Keqian Zhu
2021-03-10 9:06 ` [PATCH v2 03/11] iommu/arm-smmu-v3: Add feature detection for BBML Keqian Zhu
2021-03-10 9:06 ` [PATCH v2 04/11] iommu/arm-smmu-v3: Split block descriptor when start dirty log Keqian Zhu
2021-03-16 9:17 ` Yi Sun
2021-03-16 11:39 ` Keqian Zhu
2021-03-17 3:06 ` Yi Sun
2021-03-10 9:06 ` [PATCH v2 05/11] iommu/arm-smmu-v3: Merge a span of page when stop " Keqian Zhu
2021-03-10 9:06 ` [PATCH v2 06/11] iommu/arm-smmu-v3: Scan leaf TTD to sync hardware " Keqian Zhu
2021-03-17 10:44 ` Yi Sun
2021-03-17 12:59 ` Keqian Zhu
2021-03-10 9:06 ` [PATCH v2 07/11] iommu/arm-smmu-v3: Clear dirty log according to bitmap Keqian Zhu
2021-03-10 9:06 ` Keqian Zhu [this message]
2021-03-10 9:06 ` [PATCH v2 09/11] vfio/iommu_type1: Add HWDBM status maintanance Keqian Zhu
2021-03-10 9:06 ` [PATCH v2 10/11] vfio/iommu_type1: Optimize dirty bitmap population based on iommu HWDBM Keqian Zhu
2021-03-10 9:06 ` [PATCH v2 11/11] vfio/iommu_type1: Add support for manual dirty log clear Keqian Zhu
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=20210310090614.26668-9-zhukeqian1@huawei.com \
--to=zhukeqian1@huawei.com \
--cc=alex.williamson@redhat.com \
--cc=catalin.marinas@arm.com \
--cc=cohuck@redhat.com \
--cc=iommu@lists.linux-foundation.org \
--cc=james.morse@arm.com \
--cc=jiangkunkun@huawei.com \
--cc=kwankhede@nvidia.com \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=lushenming@huawei.com \
--cc=mark.rutland@arm.com \
--cc=maz@kernel.org \
--cc=robin.murphy@arm.com \
--cc=suzuki.poulose@arm.com \
--cc=wanghaibin.wang@huawei.com \
--cc=will@kernel.org \
--cc=yi.y.sun@linux.intel.com \
--cc=yuzenghui@huawei.com \
/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).