From 9d80448ac92b720512c415265597d349d8b5c3e8 Mon Sep 17 00:00:00 2001
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Date: Tue, 16 Aug 2016 14:13:21 +0200
Subject: [PATCH] efi/arm64: Add debugfs node to dump UEFI runtime page tables
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>
---
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 ae001450545f3..7c75a8d9091a2 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_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;
--
GitLab