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| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-10-12 16:36:14 +0800 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-10-12 16:36:14 +0800 |
| commit | d279134168c78ac2caa1f7cd2a846579da1c93ac (patch) | |
| tree | d77ab5ef3f2ac782823aea728906a7942af1c35a /arch/loongarch/Kconfig | |
| parent | 235d074fdc9a69e3720b8bb6efeb7c6d30c12d8e (diff) | |
| download | linux-d279134168c78ac2caa1f7cd2a846579da1c93ac.tar.bz2 | |
LoongArch: Use TLB for ioremap()
We can support more cache attributes (e.g., CC, SUC and WUC) and page
protection when we use TLB for ioremap(). The implementation is based
on GENERIC_IOREMAP.
The existing simple ioremap() implementation has better performance so
we keep it and introduce ARCH_IOREMAP to control the selection.
We move pagetable_init() earlier to make early ioremap() works, and we
modify the PCI ecam mapping because the TLB-based version of ioremap()
will actually take the size into account.
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/Kconfig')
| -rw-r--r-- | arch/loongarch/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index cf9deec01639..d126c50b2310 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -62,6 +62,7 @@ config LOONGARCH select GENERIC_CPU_AUTOPROBE select GENERIC_ENTRY select GENERIC_GETTIMEOFDAY + select GENERIC_IOREMAP if !ARCH_IOREMAP select GENERIC_IRQ_MULTI_HANDLER select GENERIC_IRQ_PROBE select GENERIC_IRQ_SHOW @@ -168,6 +169,9 @@ config MACH_LOONGSON32 config MACH_LOONGSON64 def_bool 64BIT +config FIX_EARLYCON_MEM + def_bool y + config PAGE_SIZE_4KB bool @@ -404,6 +408,13 @@ config FORCE_MAX_ZONEORDER The page size is not necessarily 4KB. Keep this in mind when choosing a value for this option. +config ARCH_IOREMAP + bool "Enable LoongArch DMW-based ioremap()" + help + We use generic TLB-based ioremap() by default since it has page + protection support. However, you can enable LoongArch DMW-based + ioremap() for better performance. + config SECCOMP bool "Enable seccomp to safely compute untrusted bytecode" depends on PROC_FS |