From mboxrd@z Thu Jan 1 00:00:00 1970 From: thunder.leizhen@huawei.com (Zhen Lei) Date: Thu, 31 May 2018 15:42:49 +0800 Subject: [PATCH 7/7] iommu/arm-smmu-v3: add support for non-strict mode In-Reply-To: <1527752569-18020-1-git-send-email-thunder.leizhen@huawei.com> References: <1527752569-18020-1-git-send-email-thunder.leizhen@huawei.com> Message-ID: <1527752569-18020-8-git-send-email-thunder.leizhen@huawei.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 1. Add IOMMU_CAP_NON_STRICT capability. 2. Dynamic choose strict or non-strict mode base on the iommu domain type. Signed-off-by: Zhen Lei --- drivers/iommu/arm-smmu-v3.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c index 59b3387..25bccbd 100644 --- a/drivers/iommu/arm-smmu-v3.c +++ b/drivers/iommu/arm-smmu-v3.c @@ -1440,6 +1440,8 @@ static bool arm_smmu_capable(enum iommu_cap cap) return true; case IOMMU_CAP_NOEXEC: return true; + case IOMMU_CAP_NON_STRICT: + return true; default: return false; } @@ -1767,7 +1769,7 @@ static int arm_smmu_map(struct iommu_domain *domain, unsigned long iova, if (!ops) return 0; - return ops->unmap(ops, iova, size, IOMMU_STRICT); + return ops->unmap(ops, iova, size, IOMMU_DOMAIN_IS_STRICT(domain)); } static void arm_smmu_flush_iotlb_all(struct iommu_domain *domain) @@ -1782,7 +1784,7 @@ static void arm_smmu_iotlb_sync(struct iommu_domain *domain) { struct arm_smmu_device *smmu = to_smmu_domain(domain)->smmu; - if (smmu) + if (smmu && IOMMU_DOMAIN_IS_STRICT(domain)) __arm_smmu_tlb_sync(smmu); } -- 1.8.3