Contributors: 10
| Author |
Tokens |
Token Proportion |
Commits |
Commit Proportion |
| Will Deacon |
54 |
30.68% |
2 |
15.38% |
| Catalin Marinas |
45 |
25.57% |
1 |
7.69% |
| Mike Rapoport |
31 |
17.61% |
2 |
15.38% |
| Baoquan He |
21 |
11.93% |
1 |
7.69% |
| Mark Salter |
15 |
8.52% |
2 |
15.38% |
| Kefeng Wang |
3 |
1.70% |
1 |
7.69% |
| Breno Leitão |
3 |
1.70% |
1 |
7.69% |
| Ryan Roberts |
2 |
1.14% |
1 |
7.69% |
| Laura Abbott |
1 |
0.57% |
1 |
7.69% |
| Thomas Gleixner |
1 |
0.57% |
1 |
7.69% |
| Total |
176 |
|
13 |
|
// SPDX-License-Identifier: GPL-2.0-only
#include <linux/mm.h>
#include <linux/io.h>
static ioremap_prot_hook_t ioremap_prot_hook;
int arm64_ioremap_prot_hook_register(ioremap_prot_hook_t hook)
{
if (WARN_ON(ioremap_prot_hook))
return -EBUSY;
ioremap_prot_hook = hook;
return 0;
}
void __iomem *__ioremap_prot(phys_addr_t phys_addr, size_t size,
pgprot_t pgprot)
{
unsigned long last_addr = phys_addr + size - 1;
/* Don't allow outside PHYS_MASK */
if (last_addr & ~PHYS_MASK)
return NULL;
/* Don't allow RAM to be mapped. */
if (WARN_ONCE(pfn_is_map_memory(__phys_to_pfn(phys_addr)),
"ioremap attempted on RAM pfn\n"))
return NULL;
/*
* If a hook is registered (e.g. for confidential computing
* purposes), call that now and barf if it fails.
*/
if (unlikely(ioremap_prot_hook) &&
WARN_ON(ioremap_prot_hook(phys_addr, size, &pgprot))) {
return NULL;
}
return generic_ioremap_prot(phys_addr, size, pgprot);
}
EXPORT_SYMBOL(__ioremap_prot);
/*
* Must be called after early_fixmap_init
*/
void __init early_ioremap_init(void)
{
early_ioremap_setup();
}
bool arch_memremap_can_ram_remap(resource_size_t offset, size_t size,
unsigned long flags)
{
unsigned long pfn = PHYS_PFN(offset);
return pfn_is_map_memory(pfn);
}