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-rw-r--r--arch/riscv/Kconfig1
-rw-r--r--arch/riscv/include/asm/bug.h35
-rw-r--r--arch/riscv/include/asm/cfi.h16
-rw-r--r--arch/riscv/kernel/cfi.c53
-rw-r--r--arch/riscv/kernel/kexec_elf.c1
-rw-r--r--arch/riscv/kernel/setup.c5
-rw-r--r--arch/riscv/mm/init.c2
7 files changed, 29 insertions, 84 deletions
diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index e5668d9de58b..a4b233a0659e 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -93,6 +93,7 @@ config RISCV
select CLINT_TIMER if RISCV_M_MODE
select CLONE_BACKWARDS
select COMMON_CLK
+ select CPU_NO_EFFICIENT_FFS if !RISCV_ISA_ZBB
select CPU_PM if CPU_IDLE || HIBERNATION || SUSPEND
select DYNAMIC_FTRACE if FUNCTION_TRACER
select EDAC_SUPPORT
diff --git a/arch/riscv/include/asm/bug.h b/arch/riscv/include/asm/bug.h
index 1aaea81fb141..4c03e20ad11f 100644
--- a/arch/riscv/include/asm/bug.h
+++ b/arch/riscv/include/asm/bug.h
@@ -31,40 +31,45 @@ typedef u32 bug_insn_t;
#ifdef CONFIG_GENERIC_BUG_RELATIVE_POINTERS
#define __BUG_ENTRY_ADDR RISCV_INT " 1b - ."
-#define __BUG_ENTRY_FILE RISCV_INT " %0 - ."
+#define __BUG_ENTRY_FILE(file) RISCV_INT " " file " - ."
#else
#define __BUG_ENTRY_ADDR RISCV_PTR " 1b"
-#define __BUG_ENTRY_FILE RISCV_PTR " %0"
+#define __BUG_ENTRY_FILE(file) RISCV_PTR " " file
#endif
#ifdef CONFIG_DEBUG_BUGVERBOSE
-#define __BUG_ENTRY \
+#define __BUG_ENTRY(file, line, flags) \
__BUG_ENTRY_ADDR "\n\t" \
- __BUG_ENTRY_FILE "\n\t" \
- RISCV_SHORT " %1\n\t" \
- RISCV_SHORT " %2"
+ __BUG_ENTRY_FILE(file) "\n\t" \
+ RISCV_SHORT " " line "\n\t" \
+ RISCV_SHORT " " flags
#else
-#define __BUG_ENTRY \
- __BUG_ENTRY_ADDR "\n\t" \
- RISCV_SHORT " %2"
+#define __BUG_ENTRY(file, line, flags) \
+ __BUG_ENTRY_ADDR "\n\t" \
+ RISCV_SHORT " " flags
#endif
#ifdef CONFIG_GENERIC_BUG
-#define __BUG_FLAGS(flags) \
-do { \
- __asm__ __volatile__ ( \
+
+#define ARCH_WARN_ASM(file, line, flags, size) \
"1:\n\t" \
"ebreak\n" \
".pushsection __bug_table,\"aw\"\n\t" \
"2:\n\t" \
- __BUG_ENTRY "\n\t" \
- ".org 2b + %3\n\t" \
+ __BUG_ENTRY(file, line, flags) "\n\t" \
+ ".org 2b + " size "\n\t" \
".popsection" \
+
+#define __BUG_FLAGS(flags) \
+do { \
+ __asm__ __volatile__ ( \
+ ARCH_WARN_ASM("%0", "%1", "%2", "%3") \
: \
: "i" (__FILE__), "i" (__LINE__), \
"i" (flags), \
"i" (sizeof(struct bug_entry))); \
} while (0)
+
#else /* CONFIG_GENERIC_BUG */
#define __BUG_FLAGS(flags) do { \
__asm__ __volatile__ ("ebreak\n"); \
@@ -78,6 +83,8 @@ do { \
#define __WARN_FLAGS(flags) __BUG_FLAGS(BUGFLAG_WARNING|(flags))
+#define ARCH_WARN_REACHABLE
+
#define HAVE_ARCH_BUG
#include <asm-generic/bug.h>
diff --git a/arch/riscv/include/asm/cfi.h b/arch/riscv/include/asm/cfi.h
index fb9696d7a3f2..4508aaa7a2fd 100644
--- a/arch/riscv/include/asm/cfi.h
+++ b/arch/riscv/include/asm/cfi.h
@@ -14,27 +14,11 @@ struct pt_regs;
#ifdef CONFIG_CFI_CLANG
enum bug_trap_type handle_cfi_failure(struct pt_regs *regs);
#define __bpfcall
-static inline int cfi_get_offset(void)
-{
- return 4;
-}
-
-#define cfi_get_offset cfi_get_offset
-extern u32 cfi_bpf_hash;
-extern u32 cfi_bpf_subprog_hash;
-extern u32 cfi_get_func_hash(void *func);
#else
static inline enum bug_trap_type handle_cfi_failure(struct pt_regs *regs)
{
return BUG_TRAP_TYPE_NONE;
}
-
-#define cfi_bpf_hash 0U
-#define cfi_bpf_subprog_hash 0U
-static inline u32 cfi_get_func_hash(void *func)
-{
- return 0;
-}
#endif /* CONFIG_CFI_CLANG */
#endif /* _ASM_RISCV_CFI_H */
diff --git a/arch/riscv/kernel/cfi.c b/arch/riscv/kernel/cfi.c
index 64bdd3e1ab8c..6ec9dbd7292e 100644
--- a/arch/riscv/kernel/cfi.c
+++ b/arch/riscv/kernel/cfi.c
@@ -75,56 +75,3 @@ enum bug_trap_type handle_cfi_failure(struct pt_regs *regs)
return report_cfi_failure(regs, regs->epc, &target, type);
}
-
-#ifdef CONFIG_CFI_CLANG
-struct bpf_insn;
-
-/* Must match bpf_func_t / DEFINE_BPF_PROG_RUN() */
-extern unsigned int __bpf_prog_runX(const void *ctx,
- const struct bpf_insn *insn);
-
-/*
- * Force a reference to the external symbol so the compiler generates
- * __kcfi_typid.
- */
-__ADDRESSABLE(__bpf_prog_runX);
-
-/* u32 __ro_after_init cfi_bpf_hash = __kcfi_typeid___bpf_prog_runX; */
-asm (
-" .pushsection .data..ro_after_init,\"aw\",@progbits \n"
-" .type cfi_bpf_hash,@object \n"
-" .globl cfi_bpf_hash \n"
-" .p2align 2, 0x0 \n"
-"cfi_bpf_hash: \n"
-" .word __kcfi_typeid___bpf_prog_runX \n"
-" .size cfi_bpf_hash, 4 \n"
-" .popsection \n"
-);
-
-/* Must match bpf_callback_t */
-extern u64 __bpf_callback_fn(u64, u64, u64, u64, u64);
-
-__ADDRESSABLE(__bpf_callback_fn);
-
-/* u32 __ro_after_init cfi_bpf_subprog_hash = __kcfi_typeid___bpf_callback_fn; */
-asm (
-" .pushsection .data..ro_after_init,\"aw\",@progbits \n"
-" .type cfi_bpf_subprog_hash,@object \n"
-" .globl cfi_bpf_subprog_hash \n"
-" .p2align 2, 0x0 \n"
-"cfi_bpf_subprog_hash: \n"
-" .word __kcfi_typeid___bpf_callback_fn \n"
-" .size cfi_bpf_subprog_hash, 4 \n"
-" .popsection \n"
-);
-
-u32 cfi_get_func_hash(void *func)
-{
- u32 hash;
-
- if (get_kernel_nofault(hash, func - cfi_get_offset()))
- return 0;
-
- return hash;
-}
-#endif
diff --git a/arch/riscv/kernel/kexec_elf.c b/arch/riscv/kernel/kexec_elf.c
index f4755d49b89e..56444c7bd34e 100644
--- a/arch/riscv/kernel/kexec_elf.c
+++ b/arch/riscv/kernel/kexec_elf.c
@@ -95,6 +95,7 @@ static int elf_find_pbase(struct kimage *image, unsigned long kernel_len,
kbuf.buf_align = PMD_SIZE;
kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
kbuf.memsz = ALIGN(kernel_len, PAGE_SIZE);
+ kbuf.cma = NULL;
kbuf.top_down = false;
ret = arch_kexec_locate_mem_hole(&kbuf);
if (!ret) {
diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
index 14888e5ea19a..f90cce7a3ace 100644
--- a/arch/riscv/kernel/setup.c
+++ b/arch/riscv/kernel/setup.c
@@ -21,6 +21,8 @@
#include <linux/efi.h>
#include <linux/crash_dump.h>
#include <linux/panic_notifier.h>
+#include <linux/jump_label.h>
+#include <linux/gcd.h>
#include <asm/acpi.h>
#include <asm/alternative.h>
@@ -362,6 +364,9 @@ void __init setup_arch(char **cmdline_p)
riscv_user_isa_enable();
riscv_spinlock_init();
+
+ if (!IS_ENABLED(CONFIG_RISCV_ISA_ZBB) || !riscv_isa_extension_available(NULL, ZBB))
+ static_branch_disable(&efficient_ffs_key);
}
bool arch_cpu_is_hotpluggable(int cpu)
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 8d0374d7ce8e..15683ae13fa5 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -1408,7 +1408,7 @@ static void __init arch_reserve_crashkernel(void)
ret = parse_crashkernel(boot_command_line, memblock_phys_mem_size(),
&crash_size, &crash_base,
- &low_size, &high);
+ &low_size, NULL, &high);
if (ret)
return;
generated by cgit (git 2.34.1) at 2025-08-05 12:16:14 +0000