^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) // Copyright (C) 2012 ARM Limited
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) // Copyright (C) 2005-2017 Andes Technology Corporation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) #include <linux/cache.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) #include <linux/clocksource.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/elf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/gfp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/mm.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/signal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/timekeeper_internal.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/vmalloc.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/random.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include <asm/cacheflush.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #include <asm/vdso.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) #include <asm/vdso_datapage.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #include <asm/vdso_timer_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #include <asm/cache_info.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) extern struct cache_info L1_cache_info[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) extern char vdso_start[], vdso_end[];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static unsigned long vdso_pages __ro_after_init;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) static unsigned long timer_mapping_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) struct timer_info_t timer_info = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) .cycle_count_down = true,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) .mapping_base = EMPTY_TIMER_MAPPING,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) .cycle_count_reg_offset = EMPTY_REG_OFFSET
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * The vDSO data page.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) static struct page *no_pages[] = { NULL };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static union {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) struct vdso_data data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) u8 page[PAGE_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) } vdso_data_store __page_aligned_data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) struct vdso_data *vdso_data = &vdso_data_store.data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) static struct vm_special_mapping vdso_spec[2] __ro_after_init = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) .name = "[vvar]",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) .pages = no_pages,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) .name = "[vdso]",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static void get_timer_node_info(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) timer_mapping_base = timer_info.mapping_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) vdso_data->cycle_count_offset =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) timer_info.cycle_count_reg_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) vdso_data->cycle_count_down =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) timer_info.cycle_count_down;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static int __init vdso_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) struct page **vdso_pagelist;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) if (memcmp(vdso_start, "\177ELF", 4)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) pr_err("vDSO is not a valid ELF object!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) /* Creat a timer io mapping to get clock cycles counter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) get_timer_node_info();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) vdso_pages = (vdso_end - vdso_start) >> PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) pr_info("vdso: %ld pages (%ld code @ %p, %ld data @ %p)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) vdso_pages + 1, vdso_pages, vdso_start, 1L, vdso_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) /* Allocate the vDSO pagelist */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) vdso_pagelist = kcalloc(vdso_pages, sizeof(struct page *), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) if (vdso_pagelist == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) return -ENOMEM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) for (i = 0; i < vdso_pages; i++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) vdso_pagelist[i] = virt_to_page(vdso_start + i * PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) vdso_spec[1].pages = &vdso_pagelist[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) arch_initcall(vdso_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) unsigned long inline vdso_random_addr(unsigned long vdso_mapping_len)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) unsigned long start = current->mm->mmap_base, end, offset, addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) start = PAGE_ALIGN(start);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) /* Round the lowest possible end address up to a PMD boundary. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) end = (start + vdso_mapping_len + PMD_SIZE - 1) & PMD_MASK;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) if (end >= TASK_SIZE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) end = TASK_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) end -= vdso_mapping_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) if (end > start) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) offset = get_random_int() % (((end - start) >> PAGE_SHIFT) + 1);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) addr = start + (offset << PAGE_SHIFT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) addr = start;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) return addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) struct mm_struct *mm = current->mm;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) unsigned long vdso_base, vdso_text_len, vdso_mapping_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) struct vm_area_struct *vma;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) unsigned long addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) pgprot_t prot;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) int ret, vvar_page_num = 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) vdso_text_len = vdso_pages << PAGE_SHIFT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) if(timer_mapping_base == EMPTY_VALUE)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) vvar_page_num = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) /* Be sure to map the data page */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) vdso_mapping_len = vdso_text_len + vvar_page_num * PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) #ifdef CONFIG_CPU_CACHE_ALIASING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) vdso_mapping_len += L1_cache_info[DCACHE].aliasing_num - 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) if (mmap_write_lock_killable(mm))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return -EINTR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) addr = vdso_random_addr(vdso_mapping_len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) vdso_base = get_unmapped_area(NULL, addr, vdso_mapping_len, 0, 0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) if (IS_ERR_VALUE(vdso_base)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) ret = vdso_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) goto up_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) #ifdef CONFIG_CPU_CACHE_ALIASING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) unsigned int aliasing_mask =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) L1_cache_info[DCACHE].aliasing_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) unsigned int page_colour_ofs;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) page_colour_ofs = ((unsigned int)vdso_data & aliasing_mask) -
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) (vdso_base & aliasing_mask);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) vdso_base += page_colour_ofs & aliasing_mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) vma = _install_special_mapping(mm, vdso_base, vvar_page_num * PAGE_SIZE,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) VM_READ | VM_MAYREAD, &vdso_spec[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (IS_ERR(vma)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) ret = PTR_ERR(vma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) goto up_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) /*Map vdata to user space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) ret = io_remap_pfn_range(vma, vdso_base,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) virt_to_phys(vdso_data) >> PAGE_SHIFT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) PAGE_SIZE, vma->vm_page_prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) goto up_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) /*Map timer to user space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) vdso_base += PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) prot = __pgprot(_PAGE_V | _PAGE_M_UR_KR | _PAGE_D | _PAGE_C_DEV);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) ret = io_remap_pfn_range(vma, vdso_base, timer_mapping_base >> PAGE_SHIFT,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) PAGE_SIZE, prot);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) goto up_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) /*Map vdso to user space */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) vdso_base += PAGE_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) mm->context.vdso = (void *)vdso_base;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) vma = _install_special_mapping(mm, vdso_base, vdso_text_len,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) VM_READ | VM_EXEC |
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) &vdso_spec[1]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) if (IS_ERR(vma)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) ret = PTR_ERR(vma);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) goto up_fail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) mmap_write_unlock(mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) up_fail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) mm->context.vdso = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) mmap_write_unlock(mm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) static void vdso_write_begin(struct vdso_data *vdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) ++vdso_data->seq_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) smp_wmb(); /* Pairs with smp_rmb in vdso_read_retry */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) static void vdso_write_end(struct vdso_data *vdata)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) smp_wmb(); /* Pairs with smp_rmb in vdso_read_begin */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) ++vdso_data->seq_count;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) void update_vsyscall(struct timekeeper *tk)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) vdso_write_begin(vdso_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) vdso_data->cs_mask = tk->tkr_mono.mask;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) vdso_data->cs_mult = tk->tkr_mono.mult;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) vdso_data->cs_shift = tk->tkr_mono.shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) vdso_data->cs_cycle_last = tk->tkr_mono.cycle_last;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) vdso_data->wtm_clock_sec = tk->wall_to_monotonic.tv_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) vdso_data->wtm_clock_nsec = tk->wall_to_monotonic.tv_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) vdso_data->xtime_clock_sec = tk->xtime_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) vdso_data->xtime_clock_nsec = tk->tkr_mono.xtime_nsec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) vdso_data->xtime_coarse_sec = tk->xtime_sec;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) vdso_data->xtime_coarse_nsec = tk->tkr_mono.xtime_nsec >>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) tk->tkr_mono.shift;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) vdso_data->hrtimer_res = hrtimer_resolution;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) vdso_write_end(vdso_data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) void update_vsyscall_tz(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) vdso_data->tz_minuteswest = sys_tz.tz_minuteswest;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) vdso_data->tz_dsttime = sys_tz.tz_dsttime;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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