Re: [PATCH v1 2/8] iommu: Introduce a new iommu_group_replace_domain() API

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On 2023/2/2 15:05, Nicolin Chen wrote:
+/**
+ * iommu_group_replace_domain - replace the domain that a group is attached to
+ * @new_domain: new IOMMU domain to replace with
+ * @group: IOMMU group that will be attached to the new domain
+ *
+ * This API allows the group to switch domains without being forced to go to
+ * the blocking domain in-between.
+ *
+ * If the attached domain is a core domain (e.g. a default_domain), it will act
+ * just like the iommu_attach_group().

I am not following above two lines. Why and how could iommufd set a
core domain to an iommu_group?

+ */
+int iommu_group_replace_domain(struct iommu_group *group,
+			       struct iommu_domain *new_domain)
+{
+	int ret;
+
+	if (!new_domain)
+		return -EINVAL;
+
+	mutex_lock(&group->mutex);
+	ret = __iommu_group_set_domain(group, new_domain);
+	if (ret) {
+		if (__iommu_group_set_domain(group, group->domain))
+			__iommu_group_set_core_domain(group);
+	}
+	mutex_unlock(&group->mutex);
+	return ret;
+}
+EXPORT_SYMBOL_NS_GPL(iommu_group_replace_domain, IOMMUFD_INTERNAL);

Best regards,
baolu



[Index of Archives]     [Linux Wireless]     [Linux Kernel]     [ATH6KL]     [Linux Bluetooth]     [Linux Netdev]     [Kernel Newbies]     [Share Photos]     [IDE]     [Security]     [Git]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux RAID]     [Linux ATA RAID]     [Samba]     [Device Mapper]

  Powered by Linux