File 0001-arm64-section_size_bits-compatible-with-ma... of Package crash

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File 0001-arm64-section_size_bits-compatible-with-macro-defini.patch of Package crash (Revision 88d9f79869a67081f01743af2ae7f546)

Currently displaying revision 88d9f79869a67081f01743af2ae7f546 , Show latest

From: Guanyou Chen <chenguanyou9338@gmail.com>
Date: Wed, 17 Apr 2024 19:55:40 +0800
Subject: arm64: section_size_bits compatible with macro definitions
Git-repo: https://github.com/crash-utility/crash.git
Git-commit: 568c6f049ad4a20918afeb2db9bb7a15b17d9ff2
Patch-mainline: 8.0.6
References: bsc#1228388

Compatible with google android GKI changes,
SECTION_SIZE_BITS = 27 when defined 4K_PAGES or 16K_PAGES.
SECTION_SIZE_BITS = 29 when defined 64K_PAGES.

Before android-12-gki:
    crash> help -m | grep section_size_bits
       section_size_bits: 30

The first PFN error, the physical address should be 0x40000000.
    crash> kmem -p
          PAGE        PHYSICAL      MAPPING       INDEX CNT FLAGS
    ffffffff06e00000 200000000 ffffff80edf4fa12 ffffffff070f3640  1
4000000000002000 private

After android-12-gki:
    crash> help -m | grep section
       section_size_bits: 27

crash> kmem -p
          PAGE        PHYSICAL      MAPPING       INDEX CNT FLAGS
    fffffffeffe00000  40000000                0        0  1 1000 reserved

Link: https://lore.kernel.org/lkml/15cf9a2359197fee0168f820c5c904650d07939e.1610146597.git.sudaraja@codeaurora.org
Link: https://lore.kernel.org/all/43843c5e092bfe3ec4c41e3c8c78a7ee35b69bb0.1611206601.git.sudaraja@codeaurora.org
Link: https://cs.android.com/android/_/android/kernel/common/+/673e9ab6b64f981159aeff3b65675bb7dbedecd8
Signed-off-by: chenguanyou <chenguanyou@xiaomi.com>
Signed-off-by: Jiri Slaby (SUSE) <jirislaby@kernel.org>
---
 arm64.c | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/arm64.c b/arm64.c
index af0e0d7b9f68..b3040d757946 100644
--- a/arm64.c
+++ b/arm64.c
@@ -1628,7 +1628,14 @@ arm64_get_section_size_bits(void)
 		if ((ret = get_kernel_config("CONFIG_MEMORY_HOTPLUG", NULL)) == IKCONFIG_Y) {
 			if ((ret = get_kernel_config("CONFIG_HOTPLUG_SIZE_BITS", &string)) == IKCONFIG_STR)
 				machdep->section_size_bits = atol(string);
-		} 
+		}
+
+		/* arm64: reduce section size for sparsemem */
+		if ((ret = get_kernel_config("CONFIG_ARM64_4K_PAGES", NULL)) == IKCONFIG_Y
+			|| (ret = get_kernel_config("CONFIG_ARM64_16K_PAGES", NULL)) == IKCONFIG_Y)
+			machdep->section_size_bits = _SECTION_SIZE_BITS_5_12;
+		else if ((ret = get_kernel_config("CONFIG_ARM64_64K_PAGES", NULL)) == IKCONFIG_Y)
+			machdep->section_size_bits = _SECTION_SIZE_BITS_5_12_64K;
 	}
 
 	if (CRASHDEBUG(1))
-- 
2.45.2

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File 0001-arm64-section_size_bits-compatible-with-macro-defini.patch of Package crash (Revision 88d9f79869a67081f01743af2ae7f546)

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