Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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kernel
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linux
1#ifndef _ASM_RISCV_VMALLOC_H
2#define _ASM_RISCV_VMALLOC_H
3
4#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP
5
6extern bool pgtable_l4_enabled, pgtable_l5_enabled;
7
8#define IOREMAP_MAX_ORDER (PUD_SHIFT)
9
10#define arch_vmap_pud_supported arch_vmap_pud_supported
11static inline bool arch_vmap_pud_supported(pgprot_t prot)
12{
13 return pgtable_l4_enabled || pgtable_l5_enabled;
14}
15
16#define arch_vmap_pmd_supported arch_vmap_pmd_supported
17static inline bool arch_vmap_pmd_supported(pgprot_t prot)
18{
19 return true;
20}
21
22#ifdef CONFIG_RISCV_ISA_SVNAPOT
23#include <linux/pgtable.h>
24
25#define arch_vmap_pte_range_map_size arch_vmap_pte_range_map_size
26static inline unsigned long arch_vmap_pte_range_map_size(unsigned long addr, unsigned long end,
27 u64 pfn, unsigned int max_page_shift)
28{
29 unsigned long map_size = PAGE_SIZE;
30 unsigned long size, order;
31
32 if (!has_svnapot())
33 return map_size;
34
35 for_each_napot_order_rev(order) {
36 if (napot_cont_shift(order) > max_page_shift)
37 continue;
38
39 size = napot_cont_size(order);
40 if (end - addr < size)
41 continue;
42
43 if (!IS_ALIGNED(addr, size))
44 continue;
45
46 if (!IS_ALIGNED(PFN_PHYS(pfn), size))
47 continue;
48
49 map_size = size;
50 break;
51 }
52
53 return map_size;
54}
55
56#define arch_vmap_pte_supported_shift arch_vmap_pte_supported_shift
57static inline int arch_vmap_pte_supported_shift(unsigned long size)
58{
59 int shift = PAGE_SHIFT;
60 unsigned long order;
61
62 if (!has_svnapot())
63 return shift;
64
65 WARN_ON_ONCE(size >= PMD_SIZE);
66
67 for_each_napot_order_rev(order) {
68 if (napot_cont_size(order) > size)
69 continue;
70
71 if (!IS_ALIGNED(size, napot_cont_size(order)))
72 continue;
73
74 shift = napot_cont_shift(order);
75 break;
76 }
77
78 return shift;
79}
80
81#endif /* CONFIG_RISCV_ISA_SVNAPOT */
82#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */
83#endif /* _ASM_RISCV_VMALLOC_H */