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authorArd Biesheuvel <ard.biesheuvel@linaro.org>2016-08-16 14:13:21 +0200
committerMatt Fleming <matt@codeblueprint.co.uk>2016-09-09 16:08:51 +0100
commit9d80448ac92b720512c415265597d349d8b5c3e8 (patch)
treeefafa5259fed5072fc5fa90793dd616babad0681 /drivers/firmware
parent15cf7cae087a2eaf5e1feeef2bbba1b5a94c7639 (diff)
downloadlinux-9d80448ac92b720512c415265597d349d8b5c3e8.tar.bz2
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>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/efi/arm-runtime.c20
1 files changed, 20 insertions, 0 deletions
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;