From mboxrd@z Thu Jan 1 00:00:00 1970 From: Olof Johansson Subject: [PATCH 2/2] iommu: add sysfs attribyte for domain type Date: Wed, 11 Jul 2018 13:59:36 -0700 Message-ID: <20180711205936.18614-2-olof@lixom.net> References: <20180711205936.18614-1-olof@lixom.net> Return-path: In-Reply-To: <20180711205936.18614-1-olof@lixom.net> Sender: linux-kernel-owner@vger.kernel.org To: Joerg Roedel Cc: iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Olof Johansson List-Id: iommu@lists.linux-foundation.org While we could print it at setup time, this is an easier way to match each device to their default IOMMU allocation type. Signed-off-by: Olof Johansson --- drivers/iommu/iommu.c | 32 ++++++++++++++++++++++++++++++++ 1 file changed, 32 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index ab8fc54467e0..53164107620c 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -298,11 +298,39 @@ static ssize_t iommu_group_show_resv_regions(struct iommu_group *group, return (str - buf); } +static ssize_t iommu_group_show_type(struct iommu_group *group, + char *buf) +{ + char *type = "unknown\n"; + + if (group->default_domain) { + switch (group->default_domain->type) { + case IOMMU_DOMAIN_BLOCKED: + type = "blocked\n"; + break; + case IOMMU_DOMAIN_IDENTITY: + type = "identity\n"; + break; + case IOMMU_DOMAIN_UNMANAGED: + type = "unmanaged\n"; + break; + case IOMMU_DOMAIN_DMA: + type = "DMA"; + break; + } + } + strcpy(buf, type); + + return strlen(type); +} + static IOMMU_GROUP_ATTR(name, S_IRUGO, iommu_group_show_name, NULL); static IOMMU_GROUP_ATTR(reserved_regions, 0444, iommu_group_show_resv_regions, NULL); +static IOMMU_GROUP_ATTR(type, 0444, iommu_group_show_type, NULL); + static void iommu_group_release(struct kobject *kobj) { struct iommu_group *group = to_iommu_group(kobj); @@ -384,6 +412,10 @@ struct iommu_group *iommu_group_alloc(void) if (ret) return ERR_PTR(ret); + ret = iommu_group_create_file(group, &iommu_group_attr_type); + if (ret) + return ERR_PTR(ret); + pr_debug("Allocated group %d\n", group->id); return group; -- 2.11.0