From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932510AbbDJInh (ORCPT ); Fri, 10 Apr 2015 04:43:37 -0400 Received: from g2t1383g.austin.hp.com ([15.217.136.92]:36361 "EHLO g2t1383g.austin.hp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932398AbbDJInc (ORCPT ); Fri, 10 Apr 2015 04:43:32 -0400 From: "Li, Zhen-Hua" To: , , , , , Cc: , , , , , , , , , , , , , , , Subject: [PATCH v10 03/10] iommu/vt-d: Function to get old context entry Date: Fri, 10 Apr 2015 16:42:06 +0800 Message-Id: <1428655333-19504-4-git-send-email-zhen-hual@hp.com> X-Mailer: git-send-email 2.0.0-rc0 In-Reply-To: <1428655333-19504-1-git-send-email-zhen-hual@hp.com> References: <1428655333-19504-1-git-send-email-zhen-hual@hp.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Interface for when a new domain in the crashdump kernel needs some values from the panicked kernel's context entries. Signed-off-by: Li, Zhen-Hua --- drivers/iommu/intel-iommu.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 735e28f..ff5ac04 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -369,6 +369,10 @@ static inline int first_pte_in_page(struct dma_pte *pte) */ +static struct context_entry *device_to_existing_context_entry( + struct intel_iommu *iommu, + u8 bus, u8 devfn); + /* * This domain is a statically identity mapping domain. @@ -4793,3 +4797,23 @@ static void __init check_tylersburg_isoch(void) printk(KERN_WARNING "DMAR: Recommended TLB entries for ISOCH unit is 16; your BIOS set %d\n", vtisochctrl); } + +static struct context_entry *device_to_existing_context_entry( + struct intel_iommu *iommu, + u8 bus, u8 devfn) +{ + struct root_entry *root; + struct context_entry *context; + struct context_entry *ret; + unsigned long flags; + + ret = NULL; + spin_lock_irqsave(&iommu->lock, flags); + root = &iommu->root_entry[bus]; + context = get_context_addr_from_root(root); + if (context && context_present(context+devfn)) + ret = &context[devfn]; + spin_unlock_irqrestore(&iommu->lock, flags); + return ret; +} + -- 2.0.0-rc0 From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Li, Zhen-Hua" Subject: [PATCH v10 03/10] iommu/vt-d: Function to get old context entry Date: Fri, 10 Apr 2015 16:42:06 +0800 Message-ID: <1428655333-19504-4-git-send-email-zhen-hual@hp.com> References: <1428655333-19504-1-git-send-email-zhen-hual@hp.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1428655333-19504-1-git-send-email-zhen-hual-VXdhtT5mjnY@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org, indou.takao-+CUm20s59erQFUHtdCDX3A@public.gmane.org, bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org Cc: tom.vaden-VXdhtT5mjnY@public.gmane.org, rwright-VXdhtT5mjnY@public.gmane.org, linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, lisa.mitchell-VXdhtT5mjnY@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, zhen-hual-VXdhtT5mjnY@public.gmane.org, doug.hatch-VXdhtT5mjnY@public.gmane.org, ishii.hironobu-+CUm20s59erQFUHtdCDX3A@public.gmane.org, bhelgaas-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, billsumnerlinux-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, li.zhang6-VXdhtT5mjnY@public.gmane.org List-Id: iommu@lists.linux-foundation.org Interface for when a new domain in the crashdump kernel needs some values from the panicked kernel's context entries. Signed-off-by: Li, Zhen-Hua --- drivers/iommu/intel-iommu.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 735e28f..ff5ac04 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -369,6 +369,10 @@ static inline int first_pte_in_page(struct dma_pte *pte) */ +static struct context_entry *device_to_existing_context_entry( + struct intel_iommu *iommu, + u8 bus, u8 devfn); + /* * This domain is a statically identity mapping domain. @@ -4793,3 +4797,23 @@ static void __init check_tylersburg_isoch(void) printk(KERN_WARNING "DMAR: Recommended TLB entries for ISOCH unit is 16; your BIOS set %d\n", vtisochctrl); } + +static struct context_entry *device_to_existing_context_entry( + struct intel_iommu *iommu, + u8 bus, u8 devfn) +{ + struct root_entry *root; + struct context_entry *context; + struct context_entry *ret; + unsigned long flags; + + ret = NULL; + spin_lock_irqsave(&iommu->lock, flags); + root = &iommu->root_entry[bus]; + context = get_context_addr_from_root(root); + if (context && context_present(context+devfn)) + ret = &context[devfn]; + spin_unlock_irqrestore(&iommu->lock, flags); + return ret; +} + -- 2.0.0-rc0 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from g2t2352.austin.hp.com ([15.217.128.51]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YgUXa-0006Gb-7e for kexec@lists.infradead.org; Fri, 10 Apr 2015 08:43:55 +0000 From: "Li, Zhen-Hua" Subject: [PATCH v10 03/10] iommu/vt-d: Function to get old context entry Date: Fri, 10 Apr 2015 16:42:06 +0800 Message-Id: <1428655333-19504-4-git-send-email-zhen-hual@hp.com> In-Reply-To: <1428655333-19504-1-git-send-email-zhen-hual@hp.com> References: <1428655333-19504-1-git-send-email-zhen-hual@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, vgoyal@redhat.com, dyoung@redhat.com Cc: jerry.hoemann@hp.com, tom.vaden@hp.com, rwright@hp.com, linux-pci@vger.kernel.org, kexec@lists.infradead.org, iommu@lists.linux-foundation.org, lisa.mitchell@hp.com, linux-kernel@vger.kernel.org, alex.williamson@redhat.com, zhen-hual@hp.com, ddutile@redhat.com, doug.hatch@hp.com, ishii.hironobu@jp.fujitsu.com, bhelgaas@google.com, billsumnerlinux@gmail.com, li.zhang6@hp.com Interface for when a new domain in the crashdump kernel needs some values from the panicked kernel's context entries. Signed-off-by: Li, Zhen-Hua --- drivers/iommu/intel-iommu.c | 24 ++++++++++++++++++++++++ 1 file changed, 24 insertions(+) diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index 735e28f..ff5ac04 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -369,6 +369,10 @@ static inline int first_pte_in_page(struct dma_pte *pte) */ +static struct context_entry *device_to_existing_context_entry( + struct intel_iommu *iommu, + u8 bus, u8 devfn); + /* * This domain is a statically identity mapping domain. @@ -4793,3 +4797,23 @@ static void __init check_tylersburg_isoch(void) printk(KERN_WARNING "DMAR: Recommended TLB entries for ISOCH unit is 16; your BIOS set %d\n", vtisochctrl); } + +static struct context_entry *device_to_existing_context_entry( + struct intel_iommu *iommu, + u8 bus, u8 devfn) +{ + struct root_entry *root; + struct context_entry *context; + struct context_entry *ret; + unsigned long flags; + + ret = NULL; + spin_lock_irqsave(&iommu->lock, flags); + root = &iommu->root_entry[bus]; + context = get_context_addr_from_root(root); + if (context && context_present(context+devfn)) + ret = &context[devfn]; + spin_unlock_irqrestore(&iommu->lock, flags); + return ret; +} + -- 2.0.0-rc0 _______________________________________________ kexec mailing list kexec@lists.infradead.org http://lists.infradead.org/mailman/listinfo/kexec