From: Yong Wu <yong.wu@mediatek.com>
To: Joerg Roedel <joro@8bytes.org>, Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>
Cc: Matthias Brugger <matthias.bgg@gmail.com>,
Krzysztof Kozlowski <krzk@kernel.org>,
Tomasz Figa <tfiga@google.com>,
<linux-mediatek@lists.infradead.org>,
<srv_heupstream@mediatek.com>, <linux-kernel@vger.kernel.org>,
<linux-arm-kernel@lists.infradead.org>,
<iommu@lists.linux-foundation.org>, <yong.wu@mediatek.com>,
<youlin.pei@mediatek.com>,
Nicolas Boichat <drinkcat@chromium.org>, <anan.sun@mediatek.com>,
<chao.hao@mediatek.com>, <jun.wen@mediatek.com>
Subject: [PATCH v2 4/6] iommu: Add granule_ignore when tlb gather
Date: Thu, 19 Nov 2020 14:18:34 +0800 [thread overview]
Message-ID: <20201119061836.15238-5-yong.wu@mediatek.com> (raw)
In-Reply-To: <20201119061836.15238-1-yong.wu@mediatek.com>
Add a granule_ignore option when tlb gather for some HW which don't care
about granule when it flush tlb.
Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
include/linux/iommu.h | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/include/linux/iommu.h b/include/linux/iommu.h
index 794d4085edd3..1aad32238510 100644
--- a/include/linux/iommu.h
+++ b/include/linux/iommu.h
@@ -171,6 +171,7 @@ enum iommu_dev_features {
* @start: IOVA representing the start of the range to be flushed
* @end: IOVA representing the end of the range to be flushed (exclusive)
* @pgsize: The interval at which to perform the flush
+ * @granule_ignore: For tlb flushing that could be regardless of granule.
*
* This structure is intended to be updated by multiple calls to the
* ->unmap() function in struct iommu_ops before eventually being passed
@@ -180,6 +181,7 @@ struct iommu_iotlb_gather {
unsigned long start;
unsigned long end;
size_t pgsize;
+ bool granule_ignore;
};
/**
@@ -544,7 +546,7 @@ static inline void iommu_iotlb_gather_add_page(struct iommu_domain *domain,
* a different granularity, then sync the TLB so that the gather
* structure can be rewritten.
*/
- if (gather->pgsize != size ||
+ if ((!gather->granule_ignore && gather->pgsize != size) ||
end < gather->start || start > gather->end) {
if (gather->pgsize)
iommu_iotlb_sync(domain, gather);
--
2.18.0
next prev parent reply other threads:[~2020-11-19 6:19 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-19 6:18 [PATCH v2 0/6] MediaTek IOMMU improve tlb flush performance in map/unmap Yong Wu
2020-11-19 6:18 ` [PATCH v2 1/6] iommu: Move iotlb_sync_map out from __iommu_map Yong Wu
2020-11-25 16:37 ` Robin Murphy
2020-11-19 6:18 ` [PATCH v2 2/6] iommu: Add iova and size as parameters in iommu_iotlb_map Yong Wu
2020-11-25 16:38 ` Robin Murphy
2020-11-19 6:18 ` [PATCH v2 3/6] iommu/mediatek: Add iotlb_sync_map to sync whole the iova range Yong Wu
2020-11-19 15:33 ` kernel test robot
2020-11-19 16:11 ` kernel test robot
2020-11-25 16:38 ` Robin Murphy
2020-11-19 6:18 ` Yong Wu [this message]
2020-11-25 16:38 ` [PATCH v2 4/6] iommu: Add granule_ignore when tlb gather Robin Murphy
2020-11-19 6:18 ` [PATCH v2 5/6] iommu/mediatek: Enable granule_ignore for unmap Yong Wu
2020-11-19 6:18 ` [PATCH v2 6/6] iommu/mediatek: Convert tlb_flush_walk to gather_add_page Yong Wu
2020-11-25 16:38 ` Robin Murphy
2020-11-25 12:27 ` [PATCH v2 0/6] MediaTek IOMMU improve tlb flush performance in map/unmap Will Deacon
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