9b76d71fa8
Pull RISC-V updates from Palmer Dabbelt:
"We have a handful of new features for 5.14:
- Support for transparent huge pages.
- Support for generic PCI resources mapping.
- Support for the mem= kernel parameter.
- Support for KFENCE.
- A handful of fixes to avoid W+X mappings in the kernel.
- Support for VMAP_STACK based overflow detection.
- An optimized copy_{to,from}_user"
* tag 'riscv-for-linus-5.14-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (37 commits)
riscv: xip: Fix duplicate included asm/pgtable.h
riscv: Fix PTDUMP output now BPF region moved back to module region
riscv: __asm_copy_to-from_user: Optimize unaligned memory access and pipeline stall
riscv: add VMAP_STACK overflow detection
riscv: ptrace: add argn syntax
riscv: mm: fix build errors caused by mk_pmd()
riscv: Introduce structure that group all variables regarding kernel mapping
riscv: Map the kernel with correct permissions the first time
riscv: Introduce set_kernel_memory helper
riscv: Enable KFENCE for riscv64
RISC-V: Use asm-generic for {in,out}{bwlq}
riscv: add ASID-based tlbflushing methods
riscv: pass the mm_struct to __sbi_tlb_flush_range
riscv: Add mem kernel parameter support
riscv: Simplify xip and !xip kernel address conversion macros
riscv: Remove CONFIG_PHYS_RAM_BASE_FIXED
riscv: Only initialize swiotlb when necessary
riscv: fix typo in init.c
riscv: Cleanup unused functions
riscv: mm: Use better bitmap_zalloc()
...
88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* Copyright (C) 2012 Regents of the University of California
|
|
*/
|
|
|
|
#ifndef _ASM_RISCV_PGTABLE_64_H
|
|
#define _ASM_RISCV_PGTABLE_64_H
|
|
|
|
#include <linux/const.h>
|
|
|
|
#define PGDIR_SHIFT 30
|
|
/* Size of region mapped by a page global directory */
|
|
#define PGDIR_SIZE (_AC(1, UL) << PGDIR_SHIFT)
|
|
#define PGDIR_MASK (~(PGDIR_SIZE - 1))
|
|
|
|
#define PMD_SHIFT 21
|
|
/* Size of region mapped by a page middle directory */
|
|
#define PMD_SIZE (_AC(1, UL) << PMD_SHIFT)
|
|
#define PMD_MASK (~(PMD_SIZE - 1))
|
|
|
|
/* Page Middle Directory entry */
|
|
typedef struct {
|
|
unsigned long pmd;
|
|
} pmd_t;
|
|
|
|
#define pmd_val(x) ((x).pmd)
|
|
#define __pmd(x) ((pmd_t) { (x) })
|
|
|
|
#define PTRS_PER_PMD (PAGE_SIZE / sizeof(pmd_t))
|
|
|
|
static inline int pud_present(pud_t pud)
|
|
{
|
|
return (pud_val(pud) & _PAGE_PRESENT);
|
|
}
|
|
|
|
static inline int pud_none(pud_t pud)
|
|
{
|
|
return (pud_val(pud) == 0);
|
|
}
|
|
|
|
static inline int pud_bad(pud_t pud)
|
|
{
|
|
return !pud_present(pud);
|
|
}
|
|
|
|
#define pud_leaf pud_leaf
|
|
static inline int pud_leaf(pud_t pud)
|
|
{
|
|
return pud_present(pud) && (pud_val(pud) & _PAGE_LEAF);
|
|
}
|
|
|
|
static inline void set_pud(pud_t *pudp, pud_t pud)
|
|
{
|
|
*pudp = pud;
|
|
}
|
|
|
|
static inline void pud_clear(pud_t *pudp)
|
|
{
|
|
set_pud(pudp, __pud(0));
|
|
}
|
|
|
|
static inline pmd_t *pud_pgtable(pud_t pud)
|
|
{
|
|
return (pmd_t *)pfn_to_virt(pud_val(pud) >> _PAGE_PFN_SHIFT);
|
|
}
|
|
|
|
static inline struct page *pud_page(pud_t pud)
|
|
{
|
|
return pfn_to_page(pud_val(pud) >> _PAGE_PFN_SHIFT);
|
|
}
|
|
|
|
static inline pmd_t pfn_pmd(unsigned long pfn, pgprot_t prot)
|
|
{
|
|
return __pmd((pfn << _PAGE_PFN_SHIFT) | pgprot_val(prot));
|
|
}
|
|
|
|
static inline unsigned long _pmd_pfn(pmd_t pmd)
|
|
{
|
|
return pmd_val(pmd) >> _PAGE_PFN_SHIFT;
|
|
}
|
|
|
|
#define mk_pmd(page, prot) pfn_pmd(page_to_pfn(page), prot)
|
|
|
|
#define pmd_ERROR(e) \
|
|
pr_err("%s:%d: bad pmd %016lx.\n", __FILE__, __LINE__, pmd_val(e))
|
|
|
|
#endif /* _ASM_RISCV_PGTABLE_64_H */
|