From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753283AbbCSFiB (ORCPT ); Thu, 19 Mar 2015 01:38:01 -0400 Received: from g4t3426.houston.hp.com ([15.201.208.54]:60815 "EHLO g4t3426.houston.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753042AbbCSFh4 (ORCPT ); Thu, 19 Mar 2015 01:37:56 -0400 From: "Li, Zhen-Hua" To: , , , , , Cc: , , , , , , , , , , , , , , , Subject: [PATCH v9 09/10] iommu/vt-d: Copy functions for irte Date: Thu, 19 Mar 2015 13:36:27 +0800 Message-Id: <1426743388-26908-10-git-send-email-zhen-hual@hp.com> X-Mailer: git-send-email 2.0.0-rc0 In-Reply-To: <1426743388-26908-1-git-send-email-zhen-hual@hp.com> References: <1426743388-26908-1-git-send-email-zhen-hual@hp.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Functions to copy the irte data from the old kernel into the kdump kernel. Signed-off-by: Li, Zhen-Hua --- drivers/iommu/intel_irq_remapping.c | 62 +++++++++++++++++++++++++++++++++++++ include/linux/intel-iommu.h | 4 +++ 2 files changed, 66 insertions(+) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index 14de1ab..20c060b 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -8,6 +8,7 @@ #include #include #include +#include #include #include #include @@ -17,6 +18,11 @@ #include "irq_remapping.h" +#ifdef CONFIG_CRASH_DUMP +static int __iommu_load_old_irte(struct intel_iommu *iommu); +static int __iommu_update_old_irte(struct intel_iommu *iommu, int index); +#endif /* CONFIG_CRASH_DUMP */ + struct ioapic_scope { struct intel_iommu *iommu; unsigned int id; @@ -1302,3 +1308,59 @@ int dmar_ir_hotplug(struct dmar_drhd_unit *dmaru, bool insert) return ret; } + +#ifdef CONFIG_CRASH_DUMP + +static int __iommu_load_old_irte(struct intel_iommu *iommu) +{ + if ((!iommu) + || (!iommu->ir_table) + || (!iommu->ir_table->base) + || (!iommu->ir_table->base_old_phys) + || (!iommu->ir_table->base_old_virt)) + return -1; + + memcpy(iommu->ir_table->base, + iommu->ir_table->base_old_virt, + INTR_REMAP_TABLE_ENTRIES*sizeof(struct irte)); + + __iommu_flush_cache(iommu, iommu->ir_table->base, + INTR_REMAP_TABLE_ENTRIES*sizeof(struct irte)); + + return 0; +} + +static int __iommu_update_old_irte(struct intel_iommu *iommu, int index) +{ + int start; + unsigned long size; + void __iomem *to; + void *from; + + if ((!iommu) + || (!iommu->ir_table) + || (!iommu->ir_table->base) + || (!iommu->ir_table->base_old_phys) + || (!iommu->ir_table->base_old_virt)) + return -1; + + if (index < -1 || index >= INTR_REMAP_TABLE_ENTRIES) + return -1; + + if (index == -1) { + start = 0; + size = INTR_REMAP_TABLE_ENTRIES * sizeof(struct irte); + } else { + start = index * sizeof(struct irte); + size = sizeof(struct irte); + } + + to = iommu->ir_table->base_old_virt; + from = iommu->ir_table->base; + memcpy(to + start, from + start, size); + + __iommu_flush_cache(iommu, to + start, size); + + return 0; +} +#endif /* CONFIG_CRASH_DUMP */ diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h index 8e29b97..76c6ea5 100644 --- a/include/linux/intel-iommu.h +++ b/include/linux/intel-iommu.h @@ -290,6 +290,10 @@ struct q_inval { struct ir_table { struct irte *base; unsigned long *bitmap; +#ifdef CONFIG_CRASH_DUMP + void __iomem *base_old_virt; + unsigned long base_old_phys; +#endif }; #endif -- 2.0.0-rc0