From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from g4t3426.houston.hp.com ([15.201.208.54]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1WaCUJ-0005BV-DB for kexec@lists.infradead.org; Tue, 15 Apr 2014 23:10:00 +0000 From: Bill Sumner Subject: [PATCH 7/8] Add domain-id functions to intel-iommu-kdump.c Date: Tue, 15 Apr 2014 17:09:08 -0600 Message-Id: <1397603349-30930-8-git-send-email-bill.sumner@hp.com> In-Reply-To: <1397603349-30930-1-git-send-email-bill.sumner@hp.com> References: <1397603349-30930-1-git-send-email-bill.sumner@hp.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "kexec" Errors-To: kexec-bounces+dwmw2=infradead.org@lists.infradead.org To: dwmw2@infradead.org, indou.takao@jp.fujitsu.com, bhe@redhat.com, joro@8bytes.org Cc: linux-pci@vger.kernel.org, kexec@lists.infradead.org, alex.williamson@redhat.com, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, ddutile@redhat.com, doug.hatch@hp.com, ishii.hironobu@jp.fujitsu.com, bhelgaas@google.com, zhenhua@hp.com, bill.sumner@hp.com intel_iommu_did_to_domain_values_entry() intel_iommu_get_dids_from_old_kernel() Signed-off-by: Bill Sumner --- 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 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec