10:53 p.m.
Hi lianbo
Base on qiwu's patch, is this attached patch OK ?
From 08d4af144b981daf292473303e08546ef1e81a04 Mon Sep 17 00:00:00 2001
From: chenguanyou <chenguanyou(a)xiaomi.com>
Date: Thu, 8 Aug 2024 17:35:07 +0800
Subject: [PATCH] arm64: fix regression for the determination of
section_size_bits
The commit 568c6f04 will cause a regression issue for the determination of
section_size_bits on kernel version before android12-5.10 or Linux-v5.12.
The section_size_bits is supposed to be compatible with linux upstream and
android GKI version:
Before android12-5.10 or Linux-v5.12:
SECTION_SIZE_BITS = 30
After android12-5.10 or Linux-v5.12:
SECTION_SIZE_BITS = 27 when defined 4K_PAGES or 16K_PAGES.
SECTION_SIZE_BITS = 29 when defined 64K_PAGES.
Fixes: 568c6f04 ("arm64: section_size_bits compatible with macro definitions")
Change-Id: Ib6ec610753aabb52dfbafab65e1e6c04cbe65f72
Signed-off-by: qiwu.chen <qiwu.chen(a)transsion.com>
Signed-off-by: chenguanyou <chenguanyou(a)xiaomi.com>
---
arm64.c | 22 ++++++++++------------
defs.h | 10 ++++++++++
global_data.c | 7 +++++++
kernel.c | 23 +++++++++++++++++++++++
4 files changed, 50 insertions(+), 12 deletions(-)
diff --git a/arm64.c b/arm64.c
index 8ed1aaf..f0721b7 100644
--- a/arm64.c
+++ b/arm64.c
@@ -1667,30 +1667,28 @@ arm64_get_section_size_bits(void)
int ret;
char *string;
- if (THIS_KERNEL_VERSION >= LINUX(5,12,0)) {
+ if (arm64_get_vmcoreinfo(&machdep->section_size_bits,
"NUMBER(SECTION_SIZE_BITS)", NUM_DEC))
+ goto exit;
+
+ if (THIS_KERNEL_VERSION >= LINUX(5,12,0)
+ || (IS_ANDROID_KERNEL_REL
+ && THIS_KERNEL_VERSION >= LINUX(5,10,0)
+ && THIS_ANDROID_VERSION >= ANDROID(12,0)))
if (machdep->pagesize == 65536)
machdep->section_size_bits = _SECTION_SIZE_BITS_5_12_64K;
else
machdep->section_size_bits = _SECTION_SIZE_BITS_5_12;
- } else
+ else
machdep->section_size_bits = _SECTION_SIZE_BITS;
- if (arm64_get_vmcoreinfo(&machdep->section_size_bits,
"NUMBER(SECTION_SIZE_BITS)", NUM_DEC)) {
- /* nothing */
- } else if (kt->ikconfig_flags & IKCONFIG_AVAIL) {
+ if (kt->ikconfig_flags & IKCONFIG_AVAIL) {
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;
}
+exit:
if (CRASHDEBUG(1))
fprintf(fp, "SECTION_SIZE_BITS: %ld\n", machdep->section_size_bits);
}
diff --git a/defs.h b/defs.h
index 1b7649d..b0d3f8f 100644
--- a/defs.h
+++ b/defs.h
@@ -829,6 +829,15 @@ struct kernel_table { /* kernel data */
#define IS_KERNEL_STATIC_TEXT(x) (((ulong)(x) >= kt->stext) && \
((ulong)(x) < kt->etext))
+#define THIS_KERNEL_RELEASE (kt->utsname.release)
+
+struct android_table {
+ uint android_version[2];
+};
+#define IS_ANDROID_KERNEL_REL (at->android_version[0] > 0)
+#define THIS_ANDROID_VERSION ((at->android_version[0] << 16) +
(at->android_version[1]))
+#define ANDROID(x,y) (((uint)(x) << 16) + (uint)(y))
+
#define TASK_COMM_LEN 16 /* task command name length including NULL */
struct task_context { /* context stored for each task */
@@ -5353,6 +5362,7 @@ extern struct vm_table vm_table, *vt;
extern struct machdep_table *machdep;
extern struct symbol_table_data symbol_table_data, *st;
extern struct extension_table *extension_table;
+extern struct android_table android_table, *at;
/*
* Generated in build_data.c
diff --git a/global_data.c b/global_data.c
index f9bb7d0..dddde96 100644
--- a/global_data.c
+++ b/global_data.c
@@ -55,6 +55,13 @@ struct symbol_table_data *st = &symbol_table_data;
struct machdep_table machdep_table = { 0 };
struct machdep_table *machdep = &machdep_table;
+/*
+ * The same thing goes for accesses to the frequently-accessed android_table,
+ * making the "at" pointers globally available.
+ */
+struct android_table android_table = { 0, 0 };
+struct android_table *at = &android_table;
+
/*
* Command functions are entered with the args[] array and argcnt value
* pre-set for issuance to getopt().
diff --git a/kernel.c b/kernel.c
index adb19ad..814418c 100644
--- a/kernel.c
+++ b/kernel.c
@@ -104,6 +104,26 @@ static void check_vmcoreinfo(void);
static int is_pvops_xen(void);
static int get_linux_banner_from_vmlinux(char *, size_t);
+/*
+ * Determine Andriod GKI vmcore by reading "android" from ut->release.
+ * The prefix of Andriod GKI release version is:
+ * Kernel Version - Android release version
+ * For example:
+ * 5.10.209-android12, 5.10.209-android12.1, 5.15.148-android13
+ */
+void
+parse_android_table(void)
+{
+ char *p;
+ if ((p = strstr(THIS_KERNEL_RELEASE, "android"))) {
+ sscanf(p, "android%d.%d", &at->android_version[0],
&at->android_version[1]);
+
+ if (CRASHDEBUG(1))
+ fprintf(fp, "andriod_version: andriod-%d.%d\n",
+ at->android_version[0], at->android_version[1]);
+ }
+}
+
/*
* popuplate the global kernel table (kt) with kernel version
* information parsed from UTSNAME/OSRELEASE string
@@ -298,6 +318,9 @@ kernel_init()
kt->utsname.domainname : "(not printable)");
}
+ // non-upstream rel
+ parse_android_table();
+
strncpy(buf, kt->utsname.release, 65);
if (buf[64])
buf[64] = NULLCHAR;
--
2.39.0