mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-09-15 15:15:47 +00:00
aa5e65dc08
We can see that "Time namespaces are not supported" on LoongArch: (1) clone3 test # cd tools/testing/selftests/clone3 && make && ./clone3 ... # Time namespaces are not supported ok 18 # SKIP Skipping clone3() with CLONE_NEWTIME # Totals: pass:17 fail:0 xfail:0 xpass:0 skip:1 error:0 (2) timens test # cd tools/testing/selftests/timens && make && ./timens ... 1..0 # SKIP Time namespaces are not supported On LoongArch the current kernel does not support CONFIG_TIME_NS which depends on GENERIC_VDSO_TIME_NS, select GENERIC_VDSO_TIME_NS to enable CONFIG_TIME_NS to build kernel/time/namespace.c. Additionally, it needs to define some arch-dependent functions for the timens, such as __arch_get_timens_vdso_data(), arch_get_vdso_data() and vdso_join_timens(). At the same time, modify the layout of vvar to use one page size for generic vdso data, expand another page size for timens vdso data and assign LOONGARCH_VDSO_DATA_SIZE (maybe exceeds a page size if expand in the future) for loongarch vdso data, at last add the callback function vvar_fault() and modify stack_top(). With this patch under CONFIG_TIME_NS: (1) clone3 test # cd tools/testing/selftests/clone3 && make && ./clone3 ... ok 18 [739] Result (0) matches expectation (0) # Totals: pass:18 fail:0 xfail:0 xpass:0 skip:0 error:0 (2) timens test # cd tools/testing/selftests/timens && make && ./timens ... # Totals: pass:10 fail:0 xfail:0 xpass:0 skip:0 error:0 Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
102 lines
2.7 KiB
C
102 lines
2.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
/*
|
|
* Copyright (C) 2020-2022 Loongson Technology Corporation Limited
|
|
*/
|
|
#ifndef _ASM_PAGE_H
|
|
#define _ASM_PAGE_H
|
|
|
|
#include <linux/const.h>
|
|
#include <asm/addrspace.h>
|
|
|
|
/*
|
|
* PAGE_SHIFT determines the page size
|
|
*/
|
|
#ifdef CONFIG_PAGE_SIZE_4KB
|
|
#define PAGE_SHIFT 12
|
|
#endif
|
|
#ifdef CONFIG_PAGE_SIZE_16KB
|
|
#define PAGE_SHIFT 14
|
|
#endif
|
|
#ifdef CONFIG_PAGE_SIZE_64KB
|
|
#define PAGE_SHIFT 16
|
|
#endif
|
|
#define PAGE_SIZE (_AC(1, UL) << PAGE_SHIFT)
|
|
#define PAGE_MASK (~(PAGE_SIZE - 1))
|
|
|
|
#define HPAGE_SHIFT (PAGE_SHIFT + PAGE_SHIFT - 3)
|
|
#define HPAGE_SIZE (_AC(1, UL) << HPAGE_SHIFT)
|
|
#define HPAGE_MASK (~(HPAGE_SIZE - 1))
|
|
#define HUGETLB_PAGE_ORDER (HPAGE_SHIFT - PAGE_SHIFT)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/kernel.h>
|
|
#include <linux/pfn.h>
|
|
|
|
/*
|
|
* It's normally defined only for FLATMEM config but it's
|
|
* used in our early mem init code for all memory models.
|
|
* So always define it.
|
|
*/
|
|
#define ARCH_PFN_OFFSET PFN_UP(PHYS_OFFSET)
|
|
|
|
extern void clear_page(void *page);
|
|
extern void copy_page(void *to, void *from);
|
|
|
|
#define clear_user_page(page, vaddr, pg) clear_page(page)
|
|
#define copy_user_page(to, from, vaddr, pg) copy_page(to, from)
|
|
|
|
extern unsigned long shm_align_mask;
|
|
|
|
struct page;
|
|
struct vm_area_struct;
|
|
void copy_user_highpage(struct page *to, struct page *from,
|
|
unsigned long vaddr, struct vm_area_struct *vma);
|
|
|
|
#define __HAVE_ARCH_COPY_USER_HIGHPAGE
|
|
|
|
typedef struct { unsigned long pte; } pte_t;
|
|
#define pte_val(x) ((x).pte)
|
|
#define __pte(x) ((pte_t) { (x) })
|
|
typedef struct page *pgtable_t;
|
|
|
|
typedef struct { unsigned long pgd; } pgd_t;
|
|
#define pgd_val(x) ((x).pgd)
|
|
#define __pgd(x) ((pgd_t) { (x) })
|
|
|
|
/*
|
|
* Manipulate page protection bits
|
|
*/
|
|
typedef struct { unsigned long pgprot; } pgprot_t;
|
|
#define pgprot_val(x) ((x).pgprot)
|
|
#define __pgprot(x) ((pgprot_t) { (x) })
|
|
#define pte_pgprot(x) __pgprot(pte_val(x) & ~_PFN_MASK)
|
|
|
|
#define ptep_buddy(x) ((pte_t *)((unsigned long)(x) ^ sizeof(pte_t)))
|
|
|
|
/*
|
|
* __pa()/__va() should be used only during mem init.
|
|
*/
|
|
#define __pa(x) PHYSADDR(x)
|
|
#define __va(x) ((void *)((unsigned long)(x) + PAGE_OFFSET - PHYS_OFFSET))
|
|
|
|
#define pfn_to_kaddr(pfn) __va((pfn) << PAGE_SHIFT)
|
|
#define sym_to_pfn(x) __phys_to_pfn(__pa_symbol(x))
|
|
|
|
#define virt_to_pfn(kaddr) PFN_DOWN(PHYSADDR(kaddr))
|
|
#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
|
|
|
|
extern int __virt_addr_valid(volatile void *kaddr);
|
|
#define virt_addr_valid(kaddr) __virt_addr_valid((volatile void *)(kaddr))
|
|
|
|
#define VM_DATA_DEFAULT_FLAGS \
|
|
(VM_READ | VM_WRITE | \
|
|
((current->personality & READ_IMPLIES_EXEC) ? VM_EXEC : 0) | \
|
|
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)
|
|
|
|
#include <asm-generic/memory_model.h>
|
|
#include <asm-generic/getorder.h>
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
|
|
#endif /* _ASM_PAGE_H */
|