diff options
Diffstat (limited to 'arch/riscv/include/asm')
| -rw-r--r-- | arch/riscv/include/asm/page.h | 21 | ||||
| -rw-r--r-- | arch/riscv/include/asm/processor.h | 8 | ||||
| -rw-r--r-- | arch/riscv/include/asm/vdso.h | 23 |
3 files changed, 24 insertions, 28 deletions
diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h index b0ca5058e7ae..109c97e991a6 100644 --- a/arch/riscv/include/asm/page.h +++ b/arch/riscv/include/asm/page.h @@ -79,8 +79,8 @@ typedef struct page *pgtable_t; #endif #ifdef CONFIG_MMU -extern unsigned long pfn_base; -#define ARCH_PFN_OFFSET (pfn_base) +extern unsigned long riscv_pfn_base; +#define ARCH_PFN_OFFSET (riscv_pfn_base) #else #define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT) #endif /* CONFIG_MMU */ @@ -91,10 +91,8 @@ struct kernel_mapping { uintptr_t size; /* Offset between linear mapping virtual address and kernel load address */ unsigned long va_pa_offset; -#ifdef CONFIG_64BIT /* Offset between kernel mapping virtual address and kernel load address */ unsigned long va_kernel_pa_offset; -#endif unsigned long va_kernel_xip_pa_offset; #ifdef CONFIG_XIP_KERNEL uintptr_t xiprom; @@ -105,11 +103,11 @@ struct kernel_mapping { extern struct kernel_mapping kernel_map; extern phys_addr_t phys_ram_base; -#ifdef CONFIG_64BIT #define is_kernel_mapping(x) \ ((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size)) + #define is_linear_mapping(x) \ - ((x) >= PAGE_OFFSET && (x) < kernel_map.virt_addr) + ((x) >= PAGE_OFFSET && (!IS_ENABLED(CONFIG_64BIT) || (x) < kernel_map.virt_addr)) #define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + kernel_map.va_pa_offset)) #define kernel_mapping_pa_to_va(y) ({ \ @@ -123,7 +121,7 @@ extern phys_addr_t phys_ram_base; #define linear_mapping_va_to_pa(x) ((unsigned long)(x) - kernel_map.va_pa_offset) #define kernel_mapping_va_to_pa(y) ({ \ unsigned long _y = y; \ - (_y < kernel_map.virt_addr + XIP_OFFSET) ? \ + (IS_ENABLED(CONFIG_XIP_KERNEL) && _y < kernel_map.virt_addr + XIP_OFFSET) ? \ ((unsigned long)(_y) - kernel_map.va_kernel_xip_pa_offset) : \ ((unsigned long)(_y) - kernel_map.va_kernel_pa_offset - XIP_OFFSET); \ }) @@ -133,15 +131,6 @@ extern phys_addr_t phys_ram_base; is_linear_mapping(_x) ? \ linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_x); \ }) -#else -#define is_kernel_mapping(x) \ - ((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size)) -#define is_linear_mapping(x) \ - ((x) >= PAGE_OFFSET) - -#define __pa_to_va_nodebug(x) ((void *)((unsigned long) (x) + kernel_map.va_pa_offset)) -#define __va_to_pa_nodebug(x) ((unsigned long)(x) - kernel_map.va_pa_offset) -#endif /* CONFIG_64BIT */ #ifdef CONFIG_DEBUG_VIRTUAL extern phys_addr_t __virt_to_phys(unsigned long x); diff --git a/arch/riscv/include/asm/processor.h b/arch/riscv/include/asm/processor.h index 021ed64ee608..46b492c78cbb 100644 --- a/arch/riscv/include/asm/processor.h +++ b/arch/riscv/include/asm/processor.h @@ -37,6 +37,14 @@ struct thread_struct { unsigned long bad_cause; }; +/* Whitelist the fstate from the task_struct for hardened usercopy */ +static inline void arch_thread_struct_whitelist(unsigned long *offset, + unsigned long *size) +{ + *offset = offsetof(struct thread_struct, fstate); + *size = sizeof_field(struct thread_struct, fstate); +} + #define INIT_THREAD { \ .sp = sizeof(init_stack) + (long)&init_stack, \ } diff --git a/arch/riscv/include/asm/vdso.h b/arch/riscv/include/asm/vdso.h index 1453a2f563bc..893e47195e30 100644 --- a/arch/riscv/include/asm/vdso.h +++ b/arch/riscv/include/asm/vdso.h @@ -8,26 +8,25 @@ #ifndef _ASM_RISCV_VDSO_H #define _ASM_RISCV_VDSO_H + +/* + * All systems with an MMU have a VDSO, but systems without an MMU don't + * support shared libraries and therefor don't have one. + */ +#ifdef CONFIG_MMU + #include <linux/types.h> +#include <generated/vdso-offsets.h> #ifndef CONFIG_GENERIC_TIME_VSYSCALL struct vdso_data { }; #endif -/* - * The VDSO symbols are mapped into Linux so we can just use regular symbol - * addressing to get their offsets in userspace. The symbols are mapped at an - * offset of 0, but since the linker must support setting weak undefined - * symbols to the absolute address 0 it also happens to support other low - * addresses even when the code model suggests those low addresses would not - * otherwise be availiable. - */ #define VDSO_SYMBOL(base, name) \ -({ \ - extern const char __vdso_##name[]; \ - (void __user *)((unsigned long)(base) + __vdso_##name); \ -}) + (void __user *)((unsigned long)(base) + __vdso_##name##_offset) + +#endif /* CONFIG_MMU */ asmlinkage long sys_riscv_flush_icache(uintptr_t, uintptr_t, uintptr_t); |