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| author | Olof Johansson <olof@lixom.net> | 2018-07-11 13:59:36 -0700 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2018-07-27 09:36:50 +0200 |
| commit | c52c72d3dee81af893cee0414444818ed91e2e11 (patch) | |
| tree | 5e1626618278b99dd2283951a33c64d3ec77e993 /drivers/iommu | |
| parent | 7d0f5fd3e4d687424cc2ab68b55472e328e2ee0a (diff) | |
| download | talos-obmc-linux-c52c72d3dee81af893cee0414444818ed91e2e11.tar.gz talos-obmc-linux-c52c72d3dee81af893cee0414444818ed91e2e11.zip | |
iommu: Add sysfs attribyte for domain type
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 <olof@lixom.net>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/iommu.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index d227b864a109..7f50013b0bcf 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -294,11 +294,39 @@ 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); @@ -380,6 +408,10 @@ 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; |
