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Mon, 17 Aug 2020 10:18:28 -0700 (PDT) From: Jean-Philippe Brucker To: iommu@lists.linux-foundation.org, linux-arm-kernel@lists.infradead.org, linux-mm@kvack.org Cc: joro@8bytes.org, catalin.marinas@arm.com, will@kernel.org, robin.murphy@arm.com, baolu.lu@linux.intel.com, Jonathan.Cameron@huawei.com, jacob.jun.pan@linux.intel.com, zhangfei.gao@linaro.org, xuzaibo@huawei.com, zhengxiang9@huawei.com, fenghua.yu@intel.com, Christoph Hellwig , Tony Luck Subject: [PATCH RESEND v9 01/13] mm: Define pasid in mm Date: Mon, 17 Aug 2020 19:15:47 +0200 Message-Id: <20200817171558.325917-2-jean-philippe@linaro.org> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200817171558.325917-1-jean-philippe@linaro.org> References: <20200817171558.325917-1-jean-philippe@linaro.org> MIME-Version: 1.0 X-Rspamd-Queue-Id: A2AFB10097AA0 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam01 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Fenghua Yu 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 Signed-off-by: Fenghua Yu Reviewed-by: Tony Luck --- https://lore.kernel.org/linux-iommu/1594684087-61184-8-git-send-email-fen= ghua.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 496c3ff97cce..1ff0615ef19f 100644 --- a/include/linux/mm_types.h +++ b/include/linux/mm_types.h @@ -542,6 +542,10 @@ struct mm_struct { atomic_long_t hugetlb_usage; #endif struct work_struct async_put_work; + +#ifdef CONFIG_IOMMU_SUPPORT + u32 pasid; +#endif } __randomize_layout; =20 /* --=20 2.28.0