errseq
wrappers/atomic_t
wrappers/atomic_bitops
+ floating-point
Low level entry and exit
========================
dma-api-howto
dma-attributes
dma-isa-lpc
+ swiotlb
mm-api
genalloc
pin_user_pages
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
select ARCH_HAS_CPU_FINALIZE_INIT
select ARCH_HAS_CURRENT_STACK_POINTER
+ select ARCH_HAS_FAST_MULTIPLIER
select ARCH_HAS_FORTIFY_SOURCE
select ARCH_HAS_KCOV
+ select ARCH_HAS_KERNEL_FPU_SUPPORT if CPU_HAS_FPU
select ARCH_HAS_NMI_SAFE_THIS_CPU_OPS
select ARCH_HAS_NON_OVERLAPPING_ADDRESS_SPACE
select ARCH_HAS_PTE_SPECIAL
select ARCH_SUPPORTS_ACPI
select ARCH_SUPPORTS_ATOMIC_RMW
select ARCH_SUPPORTS_HUGETLBFS
+ select ARCH_SUPPORTS_INT128 if CC_HAS_INT128
select ARCH_SUPPORTS_LTO_CLANG
select ARCH_SUPPORTS_LTO_CLANG_THIN
select ARCH_SUPPORTS_NUMA_BALANCING
select ARCH_USE_CMPXCHG_LOCKREF
select ARCH_USE_QUEUED_RWLOCKS
select ARCH_USE_QUEUED_SPINLOCKS
+ select ARCH_WANT_DEFAULT_BPF_JIT
select ARCH_WANT_DEFAULT_TOPDOWN_MMAP_LAYOUT
select ARCH_WANT_LD_ORPHAN_WARN
select ARCH_WANT_OPTIMIZE_HUGETLB_VMEMMAP
select ARCH_WANTS_NO_INSTR
+ select ARCH_WANTS_THP_SWAP if HAVE_ARCH_TRANSPARENT_HUGEPAGE
select BUILDTIME_TABLE_SORT
select COMMON_CLK
select CPU_PM
select PCI_QUIRKS
select PERF_USE_VMALLOC
select RTC_LIB
- select SMP
select SPARSE_IRQ
select SYSCTL_ARCH_UNALIGN_ALLOW
select SYSCTL_ARCH_UNALIGN_NO_WARN
config SCHED_SMT
bool "SMT scheduler support"
+ depends on SMP
default y
help
Improves scheduler's performance when there are multiple
32bit-emul = elf32loongarch
64bit-emul = elf64loongarch
+ CC_FLAGS_FPU := -mfpu=64
+ CC_FLAGS_NO_FPU := -msoft-float
+
ifdef CONFIG_UNWINDER_ORC
orc_hash_h := arch/$(SRCARCH)/include/generated/asm/orc_hash.h
orc_hash_sh := $(srctree)/scripts/orc_hash.sh
cflags-y += -mabi=lp64s
endif
- cflags-y += -pipe -msoft-float
+ cflags-y += -pipe $(CC_FLAGS_NO_FPU)
LDFLAGS_vmlinux += -static -n -nostdlib
# When the assembler supports explicit relocation hint, we must use it.
KBUILD_CFLAGS += -fno-jump-tables
endif
-KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json
+KBUILD_RUSTFLAGS += --target=loongarch64-unknown-none-softfloat
KBUILD_RUSTFLAGS_MODULE += -Crelocation-model=pic
ifeq ($(CONFIG_RELOCATABLE),y)
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
select ARCH_HAS_KCOV
+ select ARCH_HAS_KERNEL_FPU_SUPPORT if 64BIT && FPU
select ARCH_HAS_MEMBARRIER_CALLBACKS
select ARCH_HAS_MEMBARRIER_SYNC_CORE
select ARCH_HAS_MMIOWB
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
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
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
# 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
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
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
config RISCV_ISA_ZICBOZ
bool "Zicboz extension support for faster zeroing of memory"
- depends on MMU
depends on RISCV_ALTERNATIVE
default y
help
KBUILD_AFLAGS += -mabi=lp64
KBUILD_LDFLAGS += -melf64lriscv
+
+ KBUILD_RUSTFLAGS += -Ctarget-cpu=generic-rv64 --target=riscv64imac-unknown-none-elf \
+ -Cno-redzone
else
BITS := 32
UTS_MACHINE := riscv32
riscv-march-$(CONFIG_RISCV_ISA_C) := $(riscv-march-y)c
riscv-march-$(CONFIG_RISCV_ISA_V) := $(riscv-march-y)v
+ifneq ($(CONFIG_RISCV_ISA_C),y)
+ KBUILD_RUSTFLAGS += -Ctarget-feature=-c
+endif
+
ifdef CONFIG_TOOLCHAIN_NEEDS_OLD_ISA_SPEC
KBUILD_CFLAGS += -Wa,-misa-spec=2.2
KBUILD_AFLAGS += -Wa,-misa-spec=2.2
KBUILD_AFLAGS += -march=$(riscv-march-y)
+ # For C code built with floating-point support, exclude V but keep F and D.
+ CC_FLAGS_FPU := -march=$(shell echo $(riscv-march-y) | sed -E 's/(rv32ima|rv64ima)([^v_]*)v?/\1\2/')
+
KBUILD_CFLAGS += -mno-save-restore
KBUILD_CFLAGS += -DCONFIG_PAGE_OFFSET=$(CONFIG_PAGE_OFFSET)
ifeq ($(CONFIG_XIP_KERNEL),y)
KBUILD_IMAGE := $(boot)/xipImage
else
+ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN_K210),yy)
+KBUILD_IMAGE := $(boot)/loader.bin
+else
+ifeq ($(CONFIG_EFI_ZBOOT),)
KBUILD_IMAGE := $(boot)/Image.gz
+else
+KBUILD_IMAGE := $(boot)/vmlinuz.efi
+endif
+endif
endif
libs-y += arch/riscv/lib/
vdso-install-y += arch/riscv/kernel/vdso/vdso.so.dbg
vdso-install-$(CONFIG_COMPAT) += arch/riscv/kernel/compat_vdso/compat_vdso.so.dbg
-ifneq ($(CONFIG_XIP_KERNEL),y)
-ifeq ($(CONFIG_RISCV_M_MODE)$(CONFIG_SOC_CANAAN_K210),yy)
-KBUILD_IMAGE := $(boot)/loader.bin
-else
-ifeq ($(CONFIG_EFI_ZBOOT),)
-KBUILD_IMAGE := $(boot)/Image.gz
-else
-KBUILD_IMAGE := $(boot)/vmlinuz.efi
-endif
-endif
-endif
BOOT_TARGETS := Image Image.gz loader loader.bin xipImage vmlinuz.efi
all: $(notdir $(KBUILD_IMAGE))
KBUILD_RUSTFLAGS += --target=$(objtree)/scripts/target.json
KBUILD_RUSTFLAGS += -Ctarget-feature=-sse,-sse2,-sse3,-ssse3,-sse4.1,-sse4.2,-avx,-avx2
+ #
+ # CFLAGS for compiling floating point code inside the kernel.
+ #
+ CC_FLAGS_FPU := -msse -msse2
+ ifdef CONFIG_CC_IS_GCC
+ # Stack alignment mismatch, proceed with caution.
+ # GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3
+ # (8B stack alignment).
+ # See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=53383
+ #
+ # The "-msse" in the first argument is there so that the
+ # -mpreferred-stack-boundary=3 build error:
+ #
+ # -mpreferred-stack-boundary=3 is not between 4 and 12
+ #
+ # can be triggered. Otherwise gcc doesn't complain.
+ CC_FLAGS_FPU += -mhard-float
+ CC_FLAGS_FPU += $(call cc-option,-msse -mpreferred-stack-boundary=3,-mpreferred-stack-boundary=4)
+ endif
+
ifeq ($(CONFIG_X86_KERNEL_IBT),y)
#
# Kernel IBT has S_CET.NOTRACK_EN=0, as such the compilers must not generate
# suspend and hibernation support
drivers-$(CONFIG_PM) += arch/x86/power/
-drivers-$(CONFIG_FB_CORE) += arch/x86/video/
+drivers-$(CONFIG_VIDEO) += arch/x86/video/
####
# boot loader support. Several targets are kept for legacy purposes
config TEST_BITOPS
tristate "Test module for compilation of bitops operations"
- depends on m
help
This builds the "test_bitops" module that is much like the
TEST_LKM module except that it does a basic exercise of the
config TEST_FPU
tristate "Test floating point operations in kernel space"
- depends on X86 && !KCOV_INSTRUMENT_ALL
+ depends on ARCH_HAS_KERNEL_FPU_SUPPORT && !KCOV_INSTRUMENT_ALL
help
Enable this option to add /sys/kernel/debug/selftest_helpers/test_fpu
which will trigger a sequence of floating point operations. This is used
#define __KSELFTEST_HARNESS_H
#ifndef _GNU_SOURCE
-static_assert(0, "kselftest harness requires _GNU_SOURCE to be defined");
+#define _GNU_SOURCE
#endif
#include <asm/types.h>
#include <ctype.h>
struct __test_metadata *t)
{
struct __test_xfail *xfail;
- char *test_name;
+ char test_name[1024];
const char *diagnostic;
/* reset test struct */
memset(t->env, 0, sizeof(t->env));
memset(t->results->reason, 0, sizeof(t->results->reason));
- if (asprintf(&test_name, "%s%s%s.%s", f->name,
- variant->name[0] ? "." : "", variant->name, t->name) == -1) {
- ksft_print_msg("ERROR ALLOCATING MEMORY\n");
- t->exit_code = KSFT_FAIL;
- _exit(t->exit_code);
- }
+ snprintf(test_name, sizeof(test_name), "%s%s%s.%s",
+ f->name, variant->name[0] ? "." : "", variant->name, t->name);
ksft_print_msg(" RUN %s ...\n", test_name);
ksft_test_result_code(t->exit_code, test_name,
diagnostic ? "%s" : NULL, diagnostic);
- free(test_name);
}
static int test_harness_run(int argc, char **argv)
projects / linux.git / commitdiff