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efi/arm64: Add debugfs node to dump UEFI runtime page tables

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Register the debugfs node 'efi_page_tables' to allow the UEFI runtime
page tables to be inspected. Note that ARM does not have 'asm/ptdump.h'
[yet] so for now, this is arm64 only.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Matt Fleming <matt@codeblueprint.co.uk>
This commit is contained in:
Ard Biesheuvel 2016-08-16 14:13:21 +02:00 committed by Matt Fleming
parent 15cf7cae08
commit 9d80448ac9
1 changed files with 20 additions and 0 deletions
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20
drivers/firmware/efi/arm-runtime.c
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@ -39,6 +39,26 @@ static struct mm_struct efi_mm = {
.mmlist = LIST_HEAD_INIT(efi_mm.mmlist),
};
#ifdef CONFIG_ARM64_PTDUMP
#include <asm/ptdump.h>
static struct ptdump_info efi_ptdump_info = {
.mm = &efi_mm,
.markers = (struct addr_marker[]){
{ 0, "UEFI runtime start" },
{ TASK_SIZE_64, "UEFI runtime end" }
},
.base_addr = 0,
};
static int __init ptdump_init(void)
{
return ptdump_register(&efi_ptdump_info, "efi_page_tables");
}
device_initcall(ptdump_init);
#endif
static bool __init efi_virtmap_init(void)
{
efi_memory_desc_t *md;