mips/kernel/vdso.c

1 // SPDX-License-Identifier: GPL-2.0-or-later
21 #include <asm/mips-cps.h>
34 	BUG_ON(!PAGE_ALIGNED(image->data));  in init_vdso_image()
35 	BUG_ON(!PAGE_ALIGNED(image->size));  in init_vdso_image()
37 	num_pages = image->size / PAGE_SIZE;  in init_vdso_image()
39 	data_pfn = __phys_to_pfn(__pa_symbol(image->data));  in init_vdso_image()
41 		image->mapping.pages[i] = pfn_to_page(data_pfn + i);  in init_vdso_image()
69 	if (current->flags & PF_RANDOMIZE) {  in vdso_base()
79 	struct mips_vdso_image *image = current->thread.abi->vdso;  in arch_setup_additional_pages()
80 	struct mm_struct *mm = current->mm;  in arch_setup_additional_pages()
86 		return -EINTR;  in arch_setup_additional_pages()
103 	 * data page, and the GIC user page if present. Always create a mapping  in arch_setup_additional_pages()
104 	 * for the GIC user area if the GIC is present regardless of whether it  in arch_setup_additional_pages()
110 	size = gic_size + VDSO_NR_PAGES * PAGE_SIZE + image->size;  in arch_setup_additional_pages()
114 	 * colour-matching alignment below.  in arch_setup_additional_pages()
133 		base += ((unsigned long)vdso_k_time_data - gic_size) & shm_align_mask;  in arch_setup_additional_pages()
145 	/* Map GIC user page. */  in arch_setup_additional_pages()
150 			.name	= "[gic]",  in arch_setup_additional_pages()
162 					 pgprot_noncached(vma->vm_page_prot));  in arch_setup_additional_pages()
168 	vma = _install_special_mapping(mm, vdso_addr, image->size,  in arch_setup_additional_pages()
171 				       &image->mapping);  in arch_setup_additional_pages()
177 	mm->context.vdso = (void *)vdso_addr;  in arch_setup_additional_pages()