+ scripts-gdb-change-va_bits_min-when-we-use-16k-page.patch added to mm-nonmm-unstable branch

+ scripts-gdb-change-va_bits_min-when-we-use-16k-page.patch added to mm-nonmm-unstable branch

[Andrew Morton]

The patch titled
     Subject: scripts/gdb: change VA_BITS_MIN when we use 16K page
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     scripts-gdb-change-va_bits_min-when-we-use-16k-page.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/scripts-gdb-change-va_bits_min-when-we-use-16k-page.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Kuan-Ying Lee <kuan-ying.lee@canonical.com>
Subject: scripts/gdb: change VA_BITS_MIN when we use 16K page
Date: Wed, 19 Jun 2024 15:49:10 +0800

Change VA_BITS_MIN when we use 16K page.

Link: https://lkml.kernel.org/r/20240619074911.100434-6-kuan-ying.lee@canonical.com
Fixes: 9684ec186f8f ("arm64: Enable LPA2 at boot if supported by the system")
Signed-off-by: Kuan-Ying Lee <kuan-ying.lee@canonical.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 scripts/gdb/linux/mm.py |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- a/scripts/gdb/linux/mm.py~scripts-gdb-change-va_bits_min-when-we-use-16k-page
+++ a/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)
_

Patches currently in -mm which might be from kuan-ying.lee@canonical.com are

scripts-gdb-redefine-max_order-sanely.patch
scripts-gdb-rework-module-va-range.patch
scripts-gdb-change-the-layout-of-vmemmap.patch
scripts-gdb-set-vabits_actual-based-on-tcr_el1.patch
scripts-gdb-change-va_bits_min-when-we-use-16k-page.patch
scripts-gdb-rename-pool_index-to-pool_index_plus_1.patch