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From: Koba Ko <koba.ko@canonical.com>
To: David Woodhouse <dwmw2@infradead.org>,
	Lu Baolu <baolu.lu@linux.intel.com>,
	Joerg Roedel <joro@8bytes.org>
Cc: iommu@lists.linux-foundation.org,
	Kai Heng Feng <kai.heng.feng@canonical.com>,
	Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: [Issue]platform/x86: iommu: System can't shutdown because iommu driver keeps checking the status of DMA_GSTS_TES
Date: Mon, 15 Jun 2020 11:46:50 +0800	[thread overview]
Message-ID: <CAJB-X+VcHvYWngtMVHw5f_XaqA4i4T61yt=h7YvuD=eo3y7Rog@mail.gmail.com> (raw)

hi All,
I have a machine and there's only intel gpu.
the secureboot and vt-d is enabled in BIOS.
On the Ubuntu desktop, I do s2idle first and restart the machine.
The machine can't restart successfully, so I need to press the power
button to shutdown.
I tried  each of the following and the issue can't be triggered.
1. disable secure boot in BIOS.
2. intel_iommu=off.
3. intel_iomm=igfx_off.
4. nomodeset
5. i915.modeset=0.

After I investigate further, find inte_iommu keeps checking the status
of DMA_GSTS_TES.
During the procedure of restart, the driver would disable iommu translation and
check the status of DMA_GSTS_TES until status of DMA_GSTS_TES is 0.

If you need more information, I can provide it.

Thanks
Koba Ko

             reply	other threads:[~2020-06-15  3:47 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-15  3:46 Koba Ko [this message]
2020-07-09 20:58 ` [Issue]platform/x86: iommu: System can't shutdown because iommu driver keeps checking the status of DMA_GSTS_TES Limonciello, Mario
2020-07-10  2:03   ` Koba Ko
     [not found] <CAJB-X+Ww=bZN2qZ=e=4EkN_RUTiZxHxkdnHh50y9iVqZmT_XQg@mail.gmail.com>
2020-06-15  7:20 ` Lu Baolu
2020-06-30  7:31   ` Koba Ko
2020-06-30  7:52     ` Lu Baolu
2020-07-07  3:27       ` Koba Ko
2020-07-07  7:23         ` Lu Baolu

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