Interfaces for when a new domain in the crashdump kernel needs some values from the panicked kernel's context entries. Signed-off-by: Bill Sumner <bill.sumner@xxxxxx> --- drivers/iommu/intel-iommu-kdump.c | 39 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 39 insertions(+) diff --git a/drivers/iommu/intel-iommu-kdump.c b/drivers/iommu/intel-iommu-kdump.c index 4e653e048..f3c777e 100644 --- a/drivers/iommu/intel-iommu-kdump.c +++ b/drivers/iommu/intel-iommu-kdump.c @@ -53,6 +53,45 @@ static struct list_head *domain_values_list; /* ======================================================================== + * Interfaces for when a new domain in the crashdump kernel needs some + * values from the panicked kernel's context entries + * ------------------------------------------------------------------------ + */ + + +struct domain_values_entry *intel_iommu_did_to_domain_values_entry(int did, + struct intel_iommu *iommu) +{ + struct domain_values_entry *dve; /* iterator */ + + list_for_each_entry(dve, &domain_values_list[iommu->seq_id], link) + if (dve->did == did) + return dve; + return NULL; +} + + +/* Mark domain-id's from old kernel as in-use on this iommu so that a new + * domain-id is allocated in the case where there is a device in the new kernel + * that was not in the old kernel -- and therefore a new domain-id is needed. + */ +int intel_iommu_get_dids_from_old_kernel(struct intel_iommu *iommu) +{ + struct domain_values_entry *dve; /* iterator */ + + pr_info("IOMMU:%d Domain ids from panicked kernel:\n", iommu->seq_id); + + list_for_each_entry(dve, &domain_values_list[iommu->seq_id], link) { + set_bit(dve->did, iommu->domain_ids); + pr_info("DID did:%d(0x%4.4x)\n", dve->did, dve->did); + } + + pr_info("----------------------------------------\n"); + return 0; +} + + +/* ======================================================================== * Copy iommu translation tables from old kernel into new kernel. * Entry to this set of functions is: intel_iommu_copy_translation_tables() * ------------------------------------------------------------------------ -- Bill Sumner <bill.sumner@xxxxxx> -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html