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| author | Icenowy Zheng <[email protected]> | 2023-10-18 08:42:52 +0800 |
|---|---|---|
| committer | Huacai Chen <[email protected]> | 2023-10-18 08:42:52 +0800 |
| commit | 278be83601dd1725d4732241f066d528e160a39d (patch) | |
| tree | 0027aaff07b4329c0186f6bbacc429fd636499e3 /tools/perf/util/trace-event-scripting.c | |
| parent | 477a0ebec101359f49d92796e3b609857d564b52 (diff) | |
LoongArch: Disable WUC for pgprot_writecombine() like ioremap_wc()
Currently the code disables WUC only disables it for ioremap_wc(), which
is only used when mapping writecombine pages like ioremap() (mapped to
the kernel space). But for VRAM mapped in TTM/GEM, it is mapped with a
crafted pgprot by the pgprot_writecombine() function, in which case WUC
isn't disabled now.
Disable WUC for pgprot_writecombine() (fallback to SUC) if needed, like
ioremap_wc().
This improves the AMDGPU driver's stability (solves some misrendering)
on Loongson-3A5000/3A6000 machines.
Signed-off-by: Icenowy Zheng <[email protected]>
Signed-off-by: Huacai Chen <[email protected]>
Diffstat (limited to 'tools/perf/util/trace-event-scripting.c')
0 files changed, 0 insertions, 0 deletions