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authorJoerg Roedel <jroedel@suse.de>2022-05-20 13:22:14 +0300
committerJoerg Roedel <jroedel@suse.de>2022-05-20 13:23:19 +0300
commit42bb5aa043382f09bef2cc33b8431be867c70f8e (patch)
treea9d4cce9172bc6f7cb639e374cea2c641022ac4d /include/linux/iommu.h
parent9ed1d7f510336e283c0bb2d20fd771e9d8fa085b (diff)
downloadlinux-42bb5aa043382f09bef2cc33b8431be867c70f8e.tar.xz
iommu/amd: Increase timeout waiting for GA log enablement
On some systems it can take a long time for the hardware to enable the GA log of the AMD IOMMU. The current wait time is only 0.1ms, but testing showed that it can take up to 14ms for the GA log to enter running state after it has been enabled. Sometimes the long delay happens when booting the system, sometimes only on resume. Adjust the timeout accordingly to not print a warning when hardware takes a longer than usual. There has already been an attempt to fix this with commit 9b45a7738eec ("iommu/amd: Fix loop timeout issue in iommu_ga_log_enable()") But that commit was based on some wrong math and did not fix the issue in all cases. Cc: "D. Ziegfeld" <dzigg@posteo.de> Cc: Jörg-Volker Peetz <jvpeetz@web.de> Fixes: 8bda0cfbdc1a ("iommu/amd: Detect and initialize guest vAPIC log") Signed-off-by: Joerg Roedel <jroedel@suse.de> Link: https://lore.kernel.org/r/20220520102214.12563-1-joro@8bytes.org
Diffstat (limited to 'include/linux/iommu.h')
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