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From: Jean-Philippe Brucker <jean-philippe@linaro.org>
To: iommu@lists.linux-foundation.org,
	linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org
Cc: fenghua.yu@intel.com, catalin.marinas@arm.com,
	robin.murphy@arm.com, hch@infradead.org, zhengxiang9@huawei.com,
	Tony Luck <tony.luck@intel.com>,
	zhangfei.gao@linaro.org, will@kernel.org
Subject: [PATCH v9 01/13] mm: Define pasid in mm
Date: Thu, 23 Jul 2020 16:57:13 +0200	[thread overview]
Message-ID: <20200723145724.3014766-2-jean-philippe@linaro.org> (raw)
In-Reply-To: <20200723145724.3014766-1-jean-philippe@linaro.org>

From: Fenghua Yu <fenghua.yu@intel.com>

PASID is shared by all threads in a process. So the logical place to keep
track of it is in the "mm". Both ARM and X86 need to use the PASID in the
"mm".

Suggested-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Fenghua Yu <fenghua.yu@intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
---
https://lore.kernel.org/linux-iommu/1594684087-61184-8-git-send-email-fenghua.yu@intel.com/
---
---
 include/linux/mm_types.h | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/include/linux/mm_types.h b/include/linux/mm_types.h
index 64ede5f150dc..d61285cfe027 100644
--- a/include/linux/mm_types.h
+++ b/include/linux/mm_types.h
@@ -538,6 +538,10 @@ struct mm_struct {
 		atomic_long_t hugetlb_usage;
 #endif
 		struct work_struct async_put_work;
+
+#ifdef CONFIG_IOMMU_SUPPORT
+		u32 pasid;
+#endif
 	} __randomize_layout;
 
 	/*
-- 
2.27.0

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  reply	other threads:[~2020-07-23 15:05 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-23 14:57 [PATCH v9 00/13] iommu: Shared Virtual Addressing for SMMUv3 (PT sharing part) Jean-Philippe Brucker
2020-07-23 14:57 ` Jean-Philippe Brucker [this message]
2020-07-23 14:57 ` [PATCH v9 02/13] iommu/ioasid: Add ioasid references Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 03/13] iommu/sva: Add PASID helpers Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 04/13] arm64: mm: Pin down ASIDs for sharing mm with devices Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 05/13] iommu/io-pgtable-arm: Move some definitions to a header Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 06/13] arm64: cpufeature: Export symbol read_sanitised_ftr_reg() Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 07/13] iommu/arm-smmu-v3: Move definitions to a header Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 08/13] iommu/arm-smmu-v3: Share process page tables Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 09/13] iommu/arm-smmu-v3: Seize private ASID Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 10/13] iommu/arm-smmu-v3: Check for SVA features Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 11/13] iommu/arm-smmu-v3: Add SVA device feature Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 12/13] iommu/arm-smmu-v3: Implement iommu_sva_bind/unbind() Jean-Philippe Brucker
2020-07-23 14:57 ` [PATCH v9 13/13] iommu/arm-smmu-v3: Hook up ATC invalidation to mm ops Jean-Philippe Brucker

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