linux-kernel - [PATCH 5/6] scripts/gdb: change VA_BITS

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Date: Wed, 19 Jun 2024 15:49:10 +0800
From: Kuan-Ying Lee <kuan-ying.lee@...onical.com>
To: kuan-ying.lee@...onical.com,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jan Kiszka <jan.kiszka@...mens.com>,
	Kieran Bingham <kbingham@...nel.org>,
	Catalin Marinas <catalin.marinas@....com>,
	Ard Biesheuvel <ardb@...nel.org>
Cc: linux-mm@...ck.org,
	linux-kernel@...r.kernel.org
Subject: [PATCH 5/6] scripts/gdb: change VA_BITS_MIN when we use 16K page

Change VA_BITS_MIN when we use 16K page.

Fixes: 9684ec186f8f ("arm64: Enable LPA2 at boot if supported by the system")
Signed-off-by: Kuan-Ying Lee <kuan-ying.lee@...onical.com>
---
 scripts/gdb/linux/mm.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/scripts/gdb/linux/mm.py b/scripts/gdb/linux/mm.py
index 200def0e4b9a..7571aebbe650 100644
--- a/scripts/gdb/linux/mm.py
+++ b/scripts/gdb/linux/mm.py
@@ -47,7 +47,10 @@ class aarch64_page_ops():
 
         self.VA_BITS = constants.LX_CONFIG_ARM64_VA_BITS
         if self.VA_BITS > 48:
-            self.VA_BITS_MIN = 48
+            if constants.LX_CONFIG_ARM64_16K_PAGES:
+                self.VA_BITS_MIN = 47
+            else:
+                self.VA_BITS_MIN = 48
             tcr_el1 = gdb.execute("info registers $TCR_EL1", to_string=True)
             tcr_el1 = int(tcr_el1.split()[1], 16)
             self.vabits_actual = 64 - ((tcr_el1 >> 16) & 63)
-- 
2.34.1