linux-stable/arch/loongarch
Icenowy Zheng 278be83601 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 <uwu@icenowy.me>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2023-10-18 08:42:52 +08:00
..
boot
configs LoongArch: Update Loongson-3 default config file 2023-09-07 12:06:20 +08:00
crypto LoongArch: crypto: Add crc32 and crc32c hw acceleration 2023-05-01 17:19:43 +08:00
include LoongArch: Disable WUC for pgprot_writecombine() like ioremap_wc() 2023-10-18 08:42:52 +08:00
kernel LoongArch: Disable WUC for pgprot_writecombine() like ioremap_wc() 2023-10-18 08:42:52 +08:00
lib LoongArch: Add KASAN (Kernel Address Sanitizer) support 2023-09-06 22:54:16 +08:00
mm LoongArch: Replace kmap_atomic() with kmap_local_page() in copy_user_highpage() 2023-10-18 08:42:52 +08:00
net LoongArch: BPF: Fix check condition to call lu32id in move_imm() 2023-07-28 10:30:42 +08:00
pci LoongArch: Add FDT booting support from efi system table 2022-12-14 08:41:53 +08:00
power LoongArch: Export some arch-specific pm interfaces 2023-06-29 20:58:44 +08:00
vdso LoongArch: Add KASAN (Kernel Address Sanitizer) support 2023-09-06 22:54:16 +08:00
Kbuild LoongArch: Add BPF JIT support 2022-10-12 16:36:20 +08:00
Kconfig LoongArch changes for v6.6 2023-09-08 12:16:52 -07:00
Kconfig.debug
Makefile LoongArch: Add KASAN (Kernel Address Sanitizer) support 2023-09-06 22:54:16 +08:00