From db44bd517ff2de4224fdb0e9c0db426572f9fa11 Mon Sep 17 00:00:00 2001 From: Wei Huang <wei.huang2@amd.com> Date: Thu, 18 Apr 2024 10:33:48 +0000 Subject: [PATCH] iommu/amd: Add support for enabling/disabling IOMMU features Add support for struct iommu_ops.dev_{enable/disable}_feat. Please note that the empty feature switches will be populated by subsequent patches. Signed-off-by: Wei Huang <wei.huang2@amd.com> Co-developed-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com> Signed-off-by: Vasant Hegde <vasant.hegde@amd.com> Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Link: https://lore.kernel.org/r/20240418103400.6229-4-vasant.hegde@amd.com Signed-off-by: Joerg Roedel <jroedel@suse.de> --- drivers/iommu/amd/iommu.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 394623abbaa4..a22ecd8479db 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -2791,6 +2791,32 @@ static const struct iommu_dirty_ops amd_dirty_ops = { .read_and_clear_dirty = amd_iommu_read_and_clear_dirty, }; +static int amd_iommu_dev_enable_feature(struct device *dev, + enum iommu_dev_features feat) +{ + int ret; + + switch (feat) { + default: + ret = -EINVAL; + break; + } + return ret; +} + +static int amd_iommu_dev_disable_feature(struct device *dev, + enum iommu_dev_features feat) +{ + int ret; + + switch (feat) { + default: + ret = -EINVAL; + break; + } + return ret; +} + const struct iommu_ops amd_iommu_ops = { .capable = amd_iommu_capable, .domain_alloc = amd_iommu_domain_alloc, @@ -2803,6 +2829,8 @@ const struct iommu_ops amd_iommu_ops = { .is_attach_deferred = amd_iommu_is_attach_deferred, .pgsize_bitmap = AMD_IOMMU_PGSIZES, .def_domain_type = amd_iommu_def_domain_type, + .dev_enable_feat = amd_iommu_dev_enable_feature, + .dev_disable_feat = amd_iommu_dev_disable_feature, .default_domain_ops = &(const struct iommu_domain_ops) { .attach_dev = amd_iommu_attach_device, .map_pages = amd_iommu_map_pages, -- 2.30.9