From: Baoquan He <bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
To: Joerg Roedel <jroedel-l3A5Bk7waGM@public.gmane.org>
Cc: iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Subject: Re: [PATCH v8 11/13] iommu/amd: Don't copy GCR3 table root pointer
Date: Fri, 28 Jul 2017 17:07:01 +0800 [thread overview]
Message-ID: <20170728090701.GN24304@x1> (raw)
In-Reply-To: <20170727155755.GP3610-l3A5Bk7waGM@public.gmane.org>
On 07/27/17 at 05:57pm, Joerg Roedel wrote:
> On Fri, Jul 21, 2017 at 04:59:09PM +0800, Baoquan He wrote:
> > When iommu is pre_enabled in kdump kernel, if a device is set up with
> > guest translations (DTE.GV=1), then don't copy GCR3 table root pointer
> > but move the device over to an empty guest-cr3 table and handle the
> > faults in the PPR log (which answer them with INVALID). After all these
> > PPR faults are recoverable for the device and we should not allow the
> > device to change old-kernels data when we don't have to.
>
> Okay, forget my previous comment about disabling IOMMUv2 features while
> copying. Its done in this patch.
Yeah, as you said. Thanks.
>
next prev parent reply other threads:[~2017-07-28 9:07 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-21 8:58 [PATCH v8 00/13] Fix the on-flight DMA issue on system with amd iommu Baoquan He
[not found] ` <1500627551-12930-1-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-07-21 8:58 ` [PATCH v8 01/13] iommu/amd: Detect pre enabled translation Baoquan He
2017-07-27 15:04 ` Joerg Roedel
2017-07-28 2:31 ` Baoquan He
2017-07-21 8:59 ` [PATCH v8 02/13] iommu/amd: add several helper functions Baoquan He
2017-07-27 15:06 ` Joerg Roedel
[not found] ` <20170727150612.GK3610-l3A5Bk7waGM@public.gmane.org>
2017-07-28 2:36 ` Baoquan He
2017-07-31 10:01 ` Baoquan He
2017-07-31 10:07 ` Joerg Roedel
2017-07-21 8:59 ` [PATCH v8 04/13] iommu/amd: Define bit fields for DTE particularly Baoquan He
2017-07-21 8:59 ` [PATCH v8 07/13] iommu/amd: Do sanity check for irq remap of old dev table entry Baoquan He
2017-07-21 8:59 ` [PATCH v8 09/13] iommu/amd: Use is_attach_deferred call-back Baoquan He
[not found] ` <1500627551-12930-10-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-07-27 15:53 ` Joerg Roedel
[not found] ` <20170727155327.GN3610-l3A5Bk7waGM@public.gmane.org>
2017-07-28 4:02 ` Baoquan He
2017-07-21 8:59 ` [PATCH v8 03/13] Revert "iommu/amd: Suppress IO_PAGE_FAULTs in kdump kernel" Baoquan He
2017-07-21 8:59 ` [PATCH v8 05/13] iommu/amd: Add function copy_dev_tables() Baoquan He
2017-07-27 15:29 ` Joerg Roedel
2017-07-28 3:59 ` Baoquan He
2017-07-21 8:59 ` [PATCH v8 06/13] iommu/amd: copy old trans table from old kernel Baoquan He
2017-07-27 15:38 ` Joerg Roedel
[not found] ` <20170727153825.GM3610-l3A5Bk7waGM@public.gmane.org>
2017-07-28 6:52 ` Baoquan He
2017-07-21 8:59 ` [PATCH v8 08/13] iommu: Add is_attach_deferred call-back to iommu-ops Baoquan He
2017-07-21 8:59 ` [PATCH v8 10/13] iommu/amd: Allocate memory below 4G for dev table if translation pre-enabled Baoquan He
[not found] ` <1500627551-12930-11-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-07-27 15:55 ` Joerg Roedel
2017-07-28 9:06 ` Baoquan He
2017-07-28 11:14 ` Joerg Roedel
2017-07-28 11:15 ` Baoquan He
2017-07-28 11:18 ` Joerg Roedel
[not found] ` <20170728111809.GC3431-l3A5Bk7waGM@public.gmane.org>
2017-07-28 11:26 ` Baoquan He
2017-07-31 10:15 ` Baoquan He
2017-07-31 10:21 ` Joerg Roedel
[not found] ` <20170731102153.GK3431-l3A5Bk7waGM@public.gmane.org>
2017-07-31 10:29 ` Baoquan He
2017-07-21 8:59 ` [PATCH v8 11/13] iommu/amd: Don't copy GCR3 table root pointer Baoquan He
[not found] ` <1500627551-12930-12-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-07-23 22:33 ` kbuild test robot
[not found] ` <201707240618.mJ6b2eHv%fengguang.wu-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2017-07-23 23:53 ` Baoquan He
2017-07-27 15:57 ` Joerg Roedel
[not found] ` <20170727155755.GP3610-l3A5Bk7waGM@public.gmane.org>
2017-07-28 9:07 ` Baoquan He [this message]
2017-07-21 8:59 ` [PATCH v8 12/13] iommu/amd: Clear out the GV flag when handle deferred domain attach Baoquan He
2017-07-21 8:59 ` [PATCH v8 13/13] iommu/amd: Disable iommu only if amd_iommu=off is specified Baoquan He
[not found] ` <1500627551-12930-14-git-send-email-bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
2017-07-27 15:58 ` Joerg Roedel
[not found] ` <20170727155852.GQ3610-l3A5Bk7waGM@public.gmane.org>
2017-07-28 9:08 ` Baoquan He
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