6279017e80
The BP hardening helpers are an integral part of the Spectre-v2 mitigation, so move them into asm/spectre.h and inline the arm64_get_bp_hardening_data() function at the same time. Signed-off-by: Will Deacon <will@kernel.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Cc: Marc Zyngier <maz@kernel.org> Cc: Quentin Perret <qperret@google.com> Link: https://lore.kernel.org/r/20201113113847.21619-6-will@kernel.org
58 lines
1.5 KiB
C
58 lines
1.5 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2012 ARM Ltd.
|
|
*/
|
|
#ifndef __ASM_MMU_H
|
|
#define __ASM_MMU_H
|
|
|
|
#include <asm/cputype.h>
|
|
|
|
#define MMCF_AARCH32 0x1 /* mm context flag for AArch32 executables */
|
|
#define USER_ASID_BIT 48
|
|
#define USER_ASID_FLAG (UL(1) << USER_ASID_BIT)
|
|
#define TTBR_ASID_MASK (UL(0xffff) << 48)
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <linux/refcount.h>
|
|
|
|
typedef struct {
|
|
atomic64_t id;
|
|
#ifdef CONFIG_COMPAT
|
|
void *sigpage;
|
|
#endif
|
|
refcount_t pinned;
|
|
void *vdso;
|
|
unsigned long flags;
|
|
} mm_context_t;
|
|
|
|
/*
|
|
* This macro is only used by the TLBI and low-level switch_mm() code,
|
|
* neither of which can race with an ASID change. We therefore don't
|
|
* need to reload the counter using atomic64_read().
|
|
*/
|
|
#define ASID(mm) ((mm)->context.id.counter & 0xffff)
|
|
|
|
static inline bool arm64_kernel_unmapped_at_el0(void)
|
|
{
|
|
return cpus_have_const_cap(ARM64_UNMAP_KERNEL_AT_EL0);
|
|
}
|
|
|
|
extern void arm64_memblock_init(void);
|
|
extern void paging_init(void);
|
|
extern void bootmem_init(void);
|
|
extern void __iomem *early_io_map(phys_addr_t phys, unsigned long virt);
|
|
extern void init_mem_pgprot(void);
|
|
extern void create_pgd_mapping(struct mm_struct *mm, phys_addr_t phys,
|
|
unsigned long virt, phys_addr_t size,
|
|
pgprot_t prot, bool page_mappings_only);
|
|
extern void *fixmap_remap_fdt(phys_addr_t dt_phys, int *size, pgprot_t prot);
|
|
extern void mark_linear_text_alias_ro(void);
|
|
extern bool kaslr_requires_kpti(void);
|
|
|
|
#define INIT_MM_CONTEXT(name) \
|
|
.pgd = init_pg_dir,
|
|
|
|
#endif /* !__ASSEMBLY__ */
|
|
#endif
|