diff options
Diffstat (limited to 'arch/riscv/Kconfig')
| -rw-r--r-- | arch/riscv/Kconfig | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index c0853f1474a7..905e550e0fd3 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -78,6 +78,7 @@ config RISCV select HAVE_ARCH_KGDB if !XIP_KERNEL select HAVE_ARCH_KGDB_QXFER_PKT select HAVE_ARCH_MMAP_RND_BITS if MMU + select HAVE_ARCH_MMAP_RND_COMPAT_BITS if COMPAT select HAVE_ARCH_SECCOMP_FILTER select HAVE_ARCH_TRACEHOOK select HAVE_ARCH_TRANSPARENT_HUGEPAGE if 64BIT && MMU @@ -129,12 +130,18 @@ config ARCH_MMAP_RND_BITS_MIN default 18 if 64BIT default 8 +config ARCH_MMAP_RND_COMPAT_BITS_MIN + default 8 + # max bits determined by the following formula: # VA_BITS - PAGE_SHIFT - 3 config ARCH_MMAP_RND_BITS_MAX default 24 if 64BIT # SV39 based default 17 +config ARCH_MMAP_RND_COMPAT_BITS_MAX + default 17 + # set if we run in machine mode, cleared if we run in supervisor mode config RISCV_M_MODE bool @@ -326,6 +333,21 @@ config NODES_SHIFT Specify the maximum number of NUMA Nodes available on the target system. Increases memory reserved to accommodate various tables. +config RISCV_ALTERNATIVE + bool + depends on !XIP_KERNEL + help + This Kconfig allows the kernel to automatically patch the + errata required by the execution platform at run time. The + code patching is performed once in the boot stages. It means + that the overhead from this mechanism is just taken once. + +config RISCV_ALTERNATIVE_EARLY + bool + depends on RISCV_ALTERNATIVE + help + Allows early patching of the kernel for special errata + config RISCV_ISA_C bool "Emit compressed instructions when building Linux" default y @@ -336,6 +358,19 @@ config RISCV_ISA_C If you don't know what to do here, say Y. +config RISCV_ISA_SVPBMT + bool "SVPBMT extension support" + depends on 64BIT && MMU + select RISCV_ALTERNATIVE + default y + help + Adds support to dynamically detect the presence of the SVPBMT extension + (Supervisor-mode: page-based memory types) and enable its usage. + + The SVPBMT extension is only available on 64Bit cpus. + + If you don't know what to do here, say Y. + config FPU bool "FPU support" default y @@ -385,6 +420,26 @@ config KEXEC The name comes from the similarity to the exec system call. +config KEXEC_FILE + bool "kexec file based systmem call" + select KEXEC_CORE + select KEXEC_ELF + select HAVE_IMA_KEXEC if IMA + depends on 64BIT + help + This is new version of kexec system call. This system call is + file based and takes file descriptors as system call argument + for kernel and initramfs as opposed to list of segments as + accepted by previous system call. + + If you don't know what to do here, say Y. + +config ARCH_HAS_KEXEC_PURGATORY + def_bool KEXEC_FILE + select BUILD_BIN2C + depends on CRYPTO=y + depends on CRYPTO_SHA256=y + config CRASH_DUMP bool "Build kdump crash kernel" help @@ -396,6 +451,18 @@ config CRASH_DUMP For more details see Documentation/admin-guide/kdump/kdump.rst +config COMPAT + bool "Kernel support for 32-bit U-mode" + default 64BIT + depends on 64BIT && MMU + help + This option enables support for a 32-bit U-mode running under a 64-bit + kernel at S-mode. riscv32-specific components such as system calls, + the user helper functions (vdso), signal rt_frame functions and the + ptrace interface are handled appropriately by the kernel. + + If you want to execute 32-bit userspace applications, say Y. + endmenu menu "Boot options" |