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| author | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-09-14 09:56:30 -0700 |
|---|---|---|
| committer | Palmer Dabbelt <palmerdabbelt@google.com> | 2020-09-19 13:21:11 -0700 |
| commit | d5be89a8d118a8e8d09cd74a921a808f17fbdd09 (patch) | |
| tree | 23ca84b9c2f1ae9f5f1ac483bf72c60e9934786b /arch/riscv/Kconfig | |
| parent | f025d9d9934b84cd03b7796072d10686029c408e (diff) | |
| download | linux-d5be89a8d118a8e8d09cd74a921a808f17fbdd09.tar.gz linux-d5be89a8d118a8e8d09cd74a921a808f17fbdd09.tar.bz2 linux-d5be89a8d118a8e8d09cd74a921a808f17fbdd09.zip | |
RISC-V: Resurrect the MMIO timer implementation for M-mode systems
The K210 doesn't implement rdtime in M-mode, and since that's where Linux runs
in the NOMMU systems that means we can't use rdtime. The K210 is the only
system that anyone is currently running NOMMU or M-mode on, so here we're just
inlining the timer read directly.
This also adds the CLINT driver as an !MMU dependency, as it's currently the
only timer driver availiable for these systems and without it we get a build
failure for some configurations.
Tested-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
Diffstat (limited to 'arch/riscv/Kconfig')
| -rw-r--r-- | arch/riscv/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index df18372861d8..7766e1289468 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -32,6 +32,7 @@ config RISCV select ARCH_WANT_FRAME_POINTERS select ARCH_WANT_HUGE_PMD_SHARE if 64BIT select CLONE_BACKWARDS + select CLINT_TIMER if !MMU select COMMON_CLK select EDAC_SUPPORT select GENERIC_ARCH_TOPOLOGY if SMP |