[PATCH] efi: arm64: add debugfs node to dump UEFI runtime page tables
From: Ard Biesheuvel <hidden>
Date: 2016-06-30 10:01:46
Also in:
linux-efi
Subsystem:
extensible firmware interface (efi), the rest · Maintainers:
Ard Biesheuvel, Linus Torvalds
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 <redacted> --- This patch could be helpful in assessing the series 'arm64: avoid block entries that we need to split later' that I sent out yesterday. drivers/firmware/efi/arm-runtime.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+)
diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-runtime.c
index 17ccf0a8787a..4197a1da013d 100644
--- a/drivers/firmware/efi/arm-runtime.c
+++ b/drivers/firmware/efi/arm-runtime.c@@ -39,6 +39,26 @@ static struct mm_struct efi_mm = { .mmlist = LIST_HEAD_INIT(efi_mm.mmlist), }; +#ifdef CONFIG_ARM64 +#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;
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2.7.4