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arm64: trans_pgd: make trans_pgd_map_page generic

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kexec is going to use a different allocator, so make
trans_pgd_map_page to accept allocator as an argument, and also
kexec is going to use a different map protection, so also pass
it via argument.

Signed-off-by: Pavel Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Matthias Brugger <mbrugger@suse.com>
Link: https://lore.kernel.org/r/20210125191923.1060122-5-pasha.tatashin@soleen.com
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Pavel Tatashin
2021-01-25 14:19:09 -05:00
committed by Will Deacon
parent 072e3d96a7
commit 50f53fb721
3 changed files with 50 additions and 11 deletions
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12
arch/arm64/kernel/hibernate.c
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@@ -176,6 +176,11 @@ int arch_hibernation_header_restore(void *addr)
}
EXPORT_SYMBOL(arch_hibernation_header_restore);
static void *hibernate_page_alloc(void *arg)
{
return (void *)get_safe_page((gfp_t)(unsigned long)arg);
}
/*
* Copies length bytes, starting at src_start into an new page,
* perform cache maintenance, then maps it at the specified address low
@@ -192,6 +197,11 @@ static int create_safe_exec_page(void *src_start, size_t length,
unsigned long dst_addr,
phys_addr_t *phys_dst_addr)
{
struct trans_pgd_info trans_info = {
.trans_alloc_page = hibernate_page_alloc,
.trans_alloc_arg = (void *)GFP_ATOMIC,
};
void *page = (void *)get_safe_page(GFP_ATOMIC);
pgd_t *trans_pgd;
int rc;
@@ -206,7 +216,7 @@ static int create_safe_exec_page(void *src_start, size_t length,
if (!trans_pgd)
return -ENOMEM;
rc = trans_pgd_map_page(trans_pgd, page, dst_addr,
rc = trans_pgd_map_page(&trans_info, trans_pgd, page, dst_addr,
PAGE_KERNEL_EXEC);
if (rc)
return rc;