From: Joerg Roedel <joro@8bytes.org> To: iommu@lists.linux-foundation.org Cc: zhen-hual@hp.com, bhe@redhat.com, dwmw2@infradead.org, vgoyal@redhat.com, dyoung@redhat.com, alex.williamson@redhat.com, ddutile@redhat.com, ishii.hironobu@jp.fujitsu.com, indou.takao@jp.fujitsu.com, bhelgaas@google.com, doug.hatch@hp.com, jerry.hoemann@hp.com, tom.vaden@hp.com, li.zhang6@hp.com, lisa.mitchell@hp.com, billsumnerlinux@gmail.com, rwright@hp.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, kexec@lists.infradead.org, joro@8bytes.org, jroedel@suse.de Subject: [PATCH 15/17] iommu/vt-d: Mark irt entries from old kernel as allocated Date: Fri, 5 Jun 2015 16:11:01 +0200 [thread overview] Message-ID: <1433513463-19128-16-git-send-email-joro@8bytes.org> (raw) In-Reply-To: <1433513463-19128-1-git-send-email-joro@8bytes.org> From: Joerg Roedel <jroedel@suse.de> After we copied over all irq remapping entries from the old kernel we need to mark the present entries as allocated in our table too. Otherwise we might overwrite entries from the previous kernel and cause DMAR faults. Tested-by: Baoquan He <bhe@redhat.com> Signed-off-by: Joerg Roedel <jroedel@suse.de> --- drivers/iommu/intel_irq_remapping.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index fd6c25b..f7b02ca 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -1300,6 +1300,7 @@ static int iommu_load_old_irte(struct intel_iommu *iommu) { struct irte *old_ir_table; phys_addr_t irt_phys; + unsigned int i; size_t size; u64 irta; @@ -1325,6 +1326,15 @@ static int iommu_load_old_irte(struct intel_iommu *iommu) iommu->ir_table->base_old_phys = irt_phys; iommu->ir_table->base_old_virt = old_ir_table; + /* + * Now check the table for used entries and mark those as + * allocated in the bitmap + */ + for (i = 0; i < INTR_REMAP_TABLE_ENTRIES; i++) { + if (iommu->ir_table->base[i].present) + bitmap_set(iommu->ir_table->bitmap, i, 1); + } + return 0; } -- 1.9.1
WARNING: multiple messages have this Message-ID (diff)
From: Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> To: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Cc: rwright-VXdhtT5mjnY@public.gmane.org, linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, billsumnerlinux-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, doug.hatch-VXdhtT5mjnY@public.gmane.org, dyoung-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, vgoyal-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org, jroedel-l3A5Bk7waGM@public.gmane.org, tom.vaden-VXdhtT5mjnY@public.gmane.org, lisa.mitchell-VXdhtT5mjnY@public.gmane.org, zhen-hual-VXdhtT5mjnY@public.gmane.org, bhelgaas-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org, li.zhang6-VXdhtT5mjnY@public.gmane.org, kexec-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, ishii.hironobu-+CUm20s59erQFUHtdCDX3A@public.gmane.org, dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org Subject: [PATCH 15/17] iommu/vt-d: Mark irt entries from old kernel as allocated Date: Fri, 5 Jun 2015 16:11:01 +0200 [thread overview] Message-ID: <1433513463-19128-16-git-send-email-joro@8bytes.org> (raw) In-Reply-To: <1433513463-19128-1-git-send-email-joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org> From: Joerg Roedel <jroedel-l3A5Bk7waGM@public.gmane.org> After we copied over all irq remapping entries from the old kernel we need to mark the present entries as allocated in our table too. Otherwise we might overwrite entries from the previous kernel and cause DMAR faults. Tested-by: Baoquan He <bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org> Signed-off-by: Joerg Roedel <jroedel-l3A5Bk7waGM@public.gmane.org> --- drivers/iommu/intel_irq_remapping.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/drivers/iommu/intel_irq_remapping.c b/drivers/iommu/intel_irq_remapping.c index fd6c25b..f7b02ca 100644 --- a/drivers/iommu/intel_irq_remapping.c +++ b/drivers/iommu/intel_irq_remapping.c @@ -1300,6 +1300,7 @@ static int iommu_load_old_irte(struct intel_iommu *iommu) { struct irte *old_ir_table; phys_addr_t irt_phys; + unsigned int i; size_t size; u64 irta; @@ -1325,6 +1326,15 @@ static int iommu_load_old_irte(struct intel_iommu *iommu) iommu->ir_table->base_old_phys = irt_phys; iommu->ir_table->base_old_virt = old_ir_table; + /* + * Now check the table for used entries and mark those as + * allocated in the bitmap + */ + for (i = 0; i < INTR_REMAP_TABLE_ENTRIES; i++) { + if (iommu->ir_table->base[i].present) + bitmap_set(iommu->ir_table->bitmap, i, 1); + } + return 0; } -- 1.9.1
next prev parent reply other threads:[~2015-06-05 14:11 UTC|newest] Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top 2015-06-05 14:10 [PATCH 00/17] Fixes and Cleanups for the Intel VT-d driver Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 01/17] iommu/vt-d: Fix compile error when CONFIG_INTEL_IOMMU=n Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 02/17] iommu/vt-d: Remove __iommu_save_to_oldmem() function Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 03/17] iommu/vt-d: Make two functions static Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 04/17] iommu/vt-d: Load old data structures only in kdump kernel Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 05/17] iommu/vt-d: Mark root-entry present in set_root_entry Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 06/17] iommu/vt-d: Rework loading of old root-entry table Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 07/17] iommu/vt-d: Copy context-tables outside of spin_lock Joerg Roedel 2015-06-05 14:10 ` [PATCH 08/17] iommu/vt-d: Don't reuse domain-ids from old kernel Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 09/17] iommu/vt-d: Clean up log messages in intel-iommu.c Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 10/17] iommu/vt-d: Allocate irq remapping table bitmap with GFP_KERNEL Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 11/17] iommu/vt-d: Move QI initialization to intel_setup_irq_remapping Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 12/17] iommu/vt-d: Move EIM detection to intel_prepare_irq_remapping Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:10 ` [PATCH 13/17] iommu/vt-d: Split up iommu_set_irq_remapping Joerg Roedel 2015-06-05 14:10 ` Joerg Roedel 2015-06-05 14:11 ` [PATCH 14/17] iommu/vt-d: Move kdump pointer intialization to __iommu_load_old_irte Joerg Roedel 2015-06-05 14:11 ` Joerg Roedel 2015-06-05 14:11 ` Joerg Roedel [this message] 2015-06-05 14:11 ` [PATCH 15/17] iommu/vt-d: Mark irt entries from old kernel as allocated Joerg Roedel 2015-06-05 14:11 ` [PATCH 16/17] iommu/vt-d: Copy old irte in intel_setup_irq_remapping Joerg Roedel 2015-06-05 14:11 ` [PATCH 17/17] iommu/vt-d: Remove update code for old ir-table Joerg Roedel 2015-06-05 14:11 ` Joerg Roedel 2015-06-08 8:06 ` [PATCH 00/17] Fixes and Cleanups for the Intel VT-d driver Li, ZhenHua 2015-06-08 8:06 ` Li, ZhenHua 2015-06-08 8:06 ` Li, ZhenHua 2015-06-08 8:23 ` Joerg Roedel 2015-06-08 8:23 ` Joerg Roedel 2015-06-08 8:23 ` Joerg Roedel 2015-06-08 8:26 ` Li, ZhenHua 2015-06-08 8:26 ` Li, ZhenHua
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