From 7242ae4cb5288df626f464ced0a8b60fd669100b Mon Sep 17 00:00:00 2001

From: Michal Suchanek <msuchanek@suse.de>

Date: Mon, 16 Mar 2020 19:39:58 +0100

Subject: [PATCH 6/7] [PATCH] Align PMD_SECTION_MASK with PHYS_MASK

Reportedly on some arm64 systems makedumpfile loops forever exhausting

all memory when filtering kernel core. It turns out the reason is it

cannot resolve some addresses because the PMD mask is wrong. When

physical address mask allows up to 48bits pmd mask should allow the

same.

I suppose you would need a system that needs physical addresses over 1TB

to be able to reproduce this. This may be either because you have a lot

of memory or because the firmware mapped some memory above 1TB for some

reason.

Signed-off-by: Michal Suchanek <msuchanek@suse.de>

---

 arch/arm64.c | 2 +-

 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/makedumpfile-1.6.7/arch/arm64.c b/makedumpfile-1.6.7/arch/arm64.c

index 43164cc..54d60b4 100644

--- a/makedumpfile-1.6.7/arch/arm64.c

+++ b/makedumpfile-1.6.7/arch/arm64.c

@@ -81,7 +81,7 @@ static unsigned long kimage_voffset;

  * Remove the highest order bits that are not a part of the

  * physical address in a section

  */

-#define PMD_SECTION_MASK	((1UL << 40) - 1)

+#define PMD_SECTION_MASK	((1UL << PHYS_MASK_SHIFT) - 1)

 #define PMD_TYPE_MASK		3

 #define PMD_TYPE_SECT		1

-- 

2.7.5