| /* SPDX-License-Identifier: GPL-2.0 */ |
| #ifndef __ASM_VDSO_VSYSCALL_H |
| #define __ASM_VDSO_VSYSCALL_H |
| |
| #ifndef __ASSEMBLY__ |
| |
| #include <linux/timekeeper_internal.h> |
| #include <vdso/datapage.h> |
| #include <asm/cacheflush.h> |
| |
| extern struct vdso_data *vdso_data; |
| extern bool cntvct_ok; |
| |
| static __always_inline |
| bool tk_is_cntvct(const struct timekeeper *tk) |
| { |
| if (!IS_ENABLED(CONFIG_ARM_ARCH_TIMER)) |
| return false; |
| |
| if (!tk->tkr_mono.clock->archdata.vdso_direct) |
| return false; |
| |
| return true; |
| } |
| |
| /* |
| * Update the vDSO data page to keep in sync with kernel timekeeping. |
| */ |
| static __always_inline |
| struct vdso_data *__arm_get_k_vdso_data(void) |
| { |
| return vdso_data; |
| } |
| #define __arch_get_k_vdso_data __arm_get_k_vdso_data |
| |
| static __always_inline |
| int __arm_update_vdso_data(void) |
| { |
| return !cntvct_ok; |
| } |
| #define __arch_update_vdso_data __arm_update_vdso_data |
| |
| static __always_inline |
| int __arm_get_clock_mode(struct timekeeper *tk) |
| { |
| u32 __tk_is_cntvct = tk_is_cntvct(tk); |
| |
| return __tk_is_cntvct; |
| } |
| #define __arch_get_clock_mode __arm_get_clock_mode |
| |
| static __always_inline |
| int __arm_use_vsyscall(struct vdso_data *vdata) |
| { |
| return vdata[CS_HRES_COARSE].clock_mode; |
| } |
| #define __arch_use_vsyscall __arm_use_vsyscall |
| |
| static __always_inline |
| void __arm_sync_vdso_data(struct vdso_data *vdata) |
| { |
| flush_dcache_page(virt_to_page(vdata)); |
| } |
| #define __arch_sync_vdso_data __arm_sync_vdso_data |
| |
| /* The asm-generic header needs to be included after the definitions above */ |
| #include <asm-generic/vdso/vsyscall.h> |
| |
| #endif /* !__ASSEMBLY__ */ |
| |
| #endif /* __ASM_VDSO_VSYSCALL_H */ |
