Commit-ID: 9d80448ac92b720512c415265597d349d8b5c3e8
Gitweb: http://git.kernel.org/tip/9d80448ac92b720512c415265597d349d8b5c3e8
Author: Ard Biesheuvel <ard.biesheuvel@xxxxxxxxxx>
AuthorDate: Tue, 16 Aug 2016 14:13:21 +0200
Committer: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
CommitDate: Fri, 9 Sep 2016 16:08:51 +0100
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@xxxxxxxxxx>
Acked-by: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Leif Lindholm <leif.lindholm@xxxxxxxxxx>
Signed-off-by: Matt Fleming <matt@xxxxxxxxxxxxxxxxxxx>
---
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 ae00145..7c75a8d 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;
--
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