diff options
| author | Joerg Roedel <jroedel@suse.de> | 2022-05-20 13:22:14 +0300 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2022-05-20 13:23:19 +0300 |
| commit | 42bb5aa043382f09bef2cc33b8431be867c70f8e (patch) | |
| tree | a9d4cce9172bc6f7cb639e374cea2c641022ac4d /drivers/iommu | |
| parent | 9ed1d7f510336e283c0bb2d20fd771e9d8fa085b (diff) | |
| download | linux-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 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/amd/init.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/iommu/amd/init.c b/drivers/iommu/amd/init.c index 648d6b94ba8c..b69f6ab440dc 100644 --- a/drivers/iommu/amd/init.c +++ b/drivers/iommu/amd/init.c @@ -84,7 +84,7 @@ #define ACPI_DEVFLAG_LINT1 0x80 #define ACPI_DEVFLAG_ATSDIS 0x10000000 -#define LOOP_TIMEOUT 100000 +#define LOOP_TIMEOUT 2000000 /* * ACPI table definitions * |