From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tom Murphy Subject: [PATCH 5/9] iommu/amd: Implement .flush_np_cache Date: Thu, 11 Apr 2019 19:47:34 +0100 Message-ID: <20190411184741.27540-6-tmurphy@arista.com> References: <20190411184741.27540-1-tmurphy@arista.com> Return-path: In-Reply-To: <20190411184741.27540-1-tmurphy@arista.com> Sender: linux-kernel-owner@vger.kernel.org To: iommu@lists.linux-foundation.org Cc: dima@arista.com, jamessewart@arista.com, murphyt7@tcd.ie, Tom Murphy , Joerg Roedel , Will Deacon , Robin Murphy , Marek Szyprowski , Kukjin Kim , Krzysztof Kozlowski , Matthias Brugger , Rob Clark , Andy Gross , David Brown , Heiko Stuebner , Thomas Gleixner , Marc Zyngier , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-mediatek@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-rockchi List-Id: linux-rockchip.vger.kernel.org Implement flush_np_cache for the AMD iommu driver. This allows the amd iommu non present cache to be flushed if amd_iommu_np_cache is set. Signed-off-by: Tom Murphy --- drivers/iommu/amd_iommu.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index b319e51c379b..2d4ee10626b4 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1319,6 +1319,18 @@ static void domain_flush_devices(struct protection_domain *domain) device_flush_dte(dev_data); } +static void amd_iommu_flush_np_cache(struct iommu_domain *domain, + unsigned long iova, size_t size) +{ + struct protection_domain *dom = to_pdomain(domain); + + if (unlikely(amd_iommu_np_cache)) { + domain_flush_pages(dom, iova, size); + domain_flush_complete(dom); + } +} + + /**************************************************************************** * * The functions below are used the create the page table mappings for @@ -3263,6 +3275,7 @@ const struct iommu_ops amd_iommu_ops = { .flush_iotlb_all = amd_iommu_flush_iotlb_all, .iotlb_range_add = amd_iommu_iotlb_range_add, .iotlb_sync = amd_iommu_flush_iotlb_all, + .flush_np_cache = amd_iommu_flush_np_cache, }; /***************************************************************************** -- 2.17.1