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Date: Tue, 3 Feb 2026 12:49:32 +0100
From: Johannes Stezenbach <js@sig21.net>
To: Vasant Hegde <vasant.hegde@amd.com>
Cc: iommu@lists.linux.dev, "Limonciello, Mario" <Mario.Limonciello@amd.com>
Subject: Re: AMD IOMMU issue with hibernate on Asrock X600
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 <52664ef0-268b-4ffa-a8f5-d2126f95450d@amd.com>
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In-Reply-To: <52664ef0-268b-4ffa-a8f5-d2126f95450d@amd.com>

Hi Vasant,

On Tue, Feb 03, 2026 at 10:58:42AM +0530, Vasant Hegde wrote:
> On 1/26/2026 8:24 PM, Johannes Stezenbach wrote:
> > hibernate on Asrock Deskmini X600 with Ryzen 7 8700G hangs for
> > about one minute before the power is turned off. It happens with
> > older kernels but also still with 6.19.0-rc6-00200-gc072629f05d7.
> > Sometimes it also hangs for about half a minute after resume from
> > hibernate.
> 
> IIUC habernate hangs for sometime , but eventually succeeds. is that correct?

Correct. There is a ~30 sec timeout in iommu_ga_log_enable()
(MMIO_STATUS_TIMEOUT=2000000 * udelay(10)). But eventually
hibernate succeeds.

> Also resume path eventually succeeds. is that correct?

correct


Thanks,
Johannes