diff mbox

[23/29] efi/arm64: Add debugfs node to dump UEFI runtime page tables

Message ID 20160909151851.27577-24-matt@codeblueprint.co.uk
State Accepted
Commit 9d80448ac92b720512c415265597d349d8b5c3e8
Headers show

Commit Message

Matt Fleming Sept. 9, 2016, 3:18 p.m. UTC 
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>


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(+)

-- 
2.9.3
diff mbox

Patch

diff --git a/drivers/firmware/efi/arm-runtime.c b/drivers/firmware/efi/arm-runtime.c
index ae001450545f..7c75a8d9091a 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;