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Wed, 19 Jul 2023 12:19:19 +0000 Received: from BYAPR12MB3176.namprd12.prod.outlook.com ([fe80::cd5e:7e33:c2c9:fb74]) by BYAPR12MB3176.namprd12.prod.outlook.com ([fe80::cd5e:7e33:c2c9:fb74%7]) with mapi id 15.20.6588.031; Wed, 19 Jul 2023 12:19:19 +0000 From: Alistair Popple To: akpm@linux-foundation.org Cc: ajd@linux.ibm.com, catalin.marinas@arm.com, fbarrat@linux.ibm.com, iommu@lists.linux.dev, jgg@ziepe.ca, jhubbard@nvidia.com, kevin.tian@intel.com, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, mpe@ellerman.id.au, nicolinc@nvidia.com, npiggin@gmail.com, robin.murphy@arm.com, seanjc@google.com, will@kernel.org, x86@kernel.org, zhi.wang.linux@gmail.com, Alistair Popple Subject: [PATCH v2 1/5] arm64/smmu: Use TLBI ASID when invalidating entire range Date: Wed, 19 Jul 2023 22:18:42 +1000 Message-Id: <082390057ec33969c81d49d35aa3024d7082b0bd.1689768831.git-series.apopple@nvidia.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: References: X-ClientProxiedBy: SY6PR01CA0059.ausprd01.prod.outlook.com (2603:10c6:10:ea::10) To BYAPR12MB3176.namprd12.prod.outlook.com (2603:10b6:a03:134::26) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BYAPR12MB3176:EE_|DM4PR12MB5359:EE_ X-MS-Office365-Filtering-Correlation-Id: c6dd3030-fd0c-4978-31a7-08db88526064 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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Currently this is used for the IO_PGTABLE API but not for ATS when called from the MMU notifier. The current implementation of notifiers does not attempt to invalidate such a large address range, instead walking each VMA and invalidating each range individually during mmap removal. However in future SMMU TLB invalidations are going to be sent as part of the normal flush_tlb_*() kernel calls. To better deal with that add handling to use TLBI ASID when invalidating the entire address space. Signed-off-by: Alistair Popple --- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-) diff --git a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c index a5a63b1..2a19784 100644 --- a/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c +++ b/drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-sva.c @@ -200,10 +200,20 @@ static void arm_smmu_mm_invalidate_range(struct mmu_notifier *mn, * range. So do a simple translation here by calculating size correctly. */ size = end - start; + if (size == ULONG_MAX) + size = 0; + + if (!(smmu_domain->smmu->features & ARM_SMMU_FEAT_BTM)) { + if (!size) + arm_smmu_tlb_inv_asid(smmu_domain->smmu, + smmu_mn->cd->asid); + else + arm_smmu_tlb_inv_range_asid(start, size, + smmu_mn->cd->asid, + PAGE_SIZE, false, + smmu_domain); + } - if (!(smmu_domain->smmu->features & ARM_SMMU_FEAT_BTM)) - arm_smmu_tlb_inv_range_asid(start, size, smmu_mn->cd->asid, - PAGE_SIZE, false, smmu_domain); arm_smmu_atc_inv_domain(smmu_domain, mm->pasid, start, size); }