summaryrefslogtreecommitdiffstats
path: root/arch/riscv/Kconfig
diff options
context:
space:
mode:
Diffstat (limited to 'arch/riscv/Kconfig')
-rw-r--r--arch/riscv/Kconfig22
1 files changed, 14 insertions, 8 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 410d1d6e1b6c..0bdcc383644d 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -23,6 +23,7 @@ config RISCV
select ARCH_HAS_DEBUG_VIRTUAL if MMU
select ARCH_HAS_DEBUG_VM_PGTABLE
select ARCH_HAS_DEBUG_WX
+ select ARCH_HAS_FAST_MULTIPLIER
select ARCH_HAS_FORTIFY_SOURCE
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_GIGANTIC_PAGE
@@ -57,10 +58,11 @@ config RISCV
select ARCH_SUPPORTS_PAGE_TABLE_CHECK if MMU
select ARCH_SUPPORTS_PER_VMA_LOCK if MMU
select ARCH_SUPPORTS_SHADOW_CALL_STACK if HAVE_SHADOW_CALL_STACK
+ select ARCH_USE_CMPXCHG_LOCKREF if 64BIT
select ARCH_USE_MEMTEST
select ARCH_USE_QUEUED_RWLOCKS
select ARCH_USES_CFI_TRAPS if CFI_CLANG
- select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH if SMP && MMU
+ select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH if MMU
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT if MMU
select ARCH_WANT_FRAME_POINTERS
select ARCH_WANT_GENERAL_HUGETLB if !RISCV_ISA_SVNAPOT
@@ -71,7 +73,7 @@ config RISCV
select ARCH_WANTS_THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE
select BINFMT_FLAT_NO_DATA_START_OFFSET if !MMU
select BUILDTIME_TABLE_SORT if MMU
- select CLINT_TIMER if !MMU
+ select CLINT_TIMER if RISCV_M_MODE
select CLONE_BACKWARDS
select COMMON_CLK
select CPU_PM if CPU_IDLE || HIBERNATION || SUSPEND
@@ -155,6 +157,7 @@ config RISCV
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RETHOOK if !XIP_KERNEL
select HAVE_RSEQ
+ select HAVE_RUST if 64BIT
select HAVE_SAMPLE_FTRACE_DIRECT
select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
select HAVE_STACKPROTECTOR
@@ -231,8 +234,12 @@ config ARCH_MMAP_RND_COMPAT_BITS_MAX
# set if we run in machine mode, cleared if we run in supervisor mode
config RISCV_M_MODE
- bool
- default !MMU
+ bool "Build a kernel that runs in machine mode"
+ depends on !MMU
+ default y
+ help
+ Select this option if you want to run the kernel in M-mode,
+ without the assistance of any other firmware.
# set if we are running in S-mode and can use SBI calls
config RISCV_SBI
@@ -249,8 +256,9 @@ config MMU
config PAGE_OFFSET
hex
- default 0xC0000000 if 32BIT && MMU
- default 0x80000000 if !MMU
+ default 0x80000000 if !MMU && RISCV_M_MODE
+ default 0x80200000 if !MMU
+ default 0xc0000000 if 32BIT
default 0xff60000000000000 if 64BIT
config KASAN_SHADOW_OFFSET
@@ -598,7 +606,6 @@ config TOOLCHAIN_HAS_VECTOR_CRYPTO
config RISCV_ISA_ZBB
bool "Zbb extension support for bit manipulation instructions"
depends on TOOLCHAIN_HAS_ZBB
- depends on MMU
depends on RISCV_ALTERNATIVE
default y
help
@@ -630,7 +637,6 @@ config RISCV_ISA_ZICBOM
config RISCV_ISA_ZICBOZ
bool "Zicboz extension support for faster zeroing of memory"
- depends on MMU
depends on RISCV_ALTERNATIVE
default y
help