forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
71 lines
1.6 KiB
71 lines
1.6 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
/* |
|
* Copyright (C) 2020 - Google LLC |
|
* Author: Quentin Perret <[email protected]> |
|
*/ |
|
#ifndef __ARM64_KVM_PKVM_H__ |
|
#define __ARM64_KVM_PKVM_H__ |
|
|
|
#include <linux/memblock.h> |
|
#include <asm/kvm_pgtable.h> |
|
|
|
#define HYP_MEMBLOCK_REGIONS 128 |
|
|
|
extern struct memblock_region kvm_nvhe_sym(hyp_memory)[]; |
|
extern unsigned int kvm_nvhe_sym(hyp_memblock_nr); |
|
|
|
static inline unsigned long __hyp_pgtable_max_pages(unsigned long nr_pages) |
|
{ |
|
unsigned long total = 0, i; |
|
|
|
/* Provision the worst case scenario */ |
|
for (i = 0; i < KVM_PGTABLE_MAX_LEVELS; i++) { |
|
nr_pages = DIV_ROUND_UP(nr_pages, PTRS_PER_PTE); |
|
total += nr_pages; |
|
} |
|
|
|
return total; |
|
} |
|
|
|
static inline unsigned long __hyp_pgtable_total_pages(void) |
|
{ |
|
unsigned long res = 0, i; |
|
|
|
/* Cover all of memory with page-granularity */ |
|
for (i = 0; i < kvm_nvhe_sym(hyp_memblock_nr); i++) { |
|
struct memblock_region *reg = &kvm_nvhe_sym(hyp_memory)[i]; |
|
res += __hyp_pgtable_max_pages(reg->size >> PAGE_SHIFT); |
|
} |
|
|
|
return res; |
|
} |
|
|
|
static inline unsigned long hyp_s1_pgtable_pages(void) |
|
{ |
|
unsigned long res; |
|
|
|
res = __hyp_pgtable_total_pages(); |
|
|
|
/* Allow 1 GiB for private mappings */ |
|
res += __hyp_pgtable_max_pages(SZ_1G >> PAGE_SHIFT); |
|
|
|
return res; |
|
} |
|
|
|
static inline unsigned long host_s2_pgtable_pages(void) |
|
{ |
|
unsigned long res; |
|
|
|
/* |
|
* Include an extra 16 pages to safely upper-bound the worst case of |
|
* concatenated pgds. |
|
*/ |
|
res = __hyp_pgtable_total_pages() + 16; |
|
|
|
/* Allow 1 GiB for MMIO mappings */ |
|
res += __hyp_pgtable_max_pages(SZ_1G >> PAGE_SHIFT); |
|
|
|
return res; |
|
} |
|
|
|
#endif /* __ARM64_KVM_PKVM_H__ */
|
|
|