Merge: [RHEL-9.8]Rebase kexec/kdump to the upstream kernel v6.15

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/7486

```
JIRA: https://issues.redhat.com/browse/RHEL-114163

Upstream Status: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

This is to sync the rhel9.8 kernel to the latest upstream kernel 6.15, mainly bug fixes and small cleanup,  will skip big features.

Signed-off-by: Baoquan He <bhe@redhat.com>
```

Approved-by: Steve Best <sbest@redhat.com>
Approved-by: Lianbo Jiang <lijiang@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: CKI GitLab Kmaint Pipeline Bot <26919896-cki-kmaint-pipeline-bot@users.noreply.gitlab.com>

Author: CKI KWF Bot

arch/arm64/Kconfig

@@ -1565,6 +1565,9 @@ config ARCH_DEFAULT_KEXEC_IMAGE_VERIFY_SIG
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool y
 
+config ARCH_DEFAULT_CRASH_DUMP
+	def_bool y
+
 config ARCH_HAS_GENERIC_CRASHKERNEL_RESERVATION
 	def_bool CRASH_RESERVE
 

arch/mips/Kconfig

@@ -3059,6 +3059,9 @@ config ARCH_SUPPORTS_KEXEC
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool y
 
+config ARCH_DEFAULT_CRASH_DUMP
+	def_bool y
+
 config PHYSICAL_START
 	hex "Physical address where the kernel is loaded"
 	default "0xffffffff84000000"

arch/powerpc/Kconfig

@@ -591,6 +591,10 @@ config CRASH_DUMP
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool PPC64 || PPC_BOOK3S_32 || FSL_BOOKE || (44x && !SMP)
 
+config ARCH_DEFAULT_CRASH_DUMP
+	bool
+	default y if !PPC_BOOK3S_32
+
 config ARCH_SELECTS_CRASH_DUMP
 	def_bool y
 	depends on CRASH_DUMP

arch/s390/Kconfig

@@ -277,6 +277,9 @@ config ARCH_SUPPORTS_CRASH_DUMP
 	  This option also enables s390 zfcpdump.
 	  See also <file:Documentation/s390/zfcpdump.rst>
 
+config ARCH_DEFAULT_CRASH_DUMP
+	def_bool y
+
 menu "Processor type and features"
 
 config HAVE_MARCH_Z10_FEATURES

arch/x86/Kconfig

@@ -2098,6 +2098,9 @@ config ARCH_SUPPORTS_KEXEC_JUMP
 config ARCH_SUPPORTS_CRASH_DUMP
 	def_bool X86_64 || (X86_32 && HIGHMEM)
 
+config ARCH_DEFAULT_CRASH_DUMP
+	def_bool y
+
 config ARCH_SUPPORTS_CRASH_HOTPLUG
 	def_bool y
 

kernel/Kconfig.kexec

@@ -97,7 +97,7 @@ config KEXEC_JUMP
 
 config CRASH_DUMP
 	bool "kernel crash dumps"
-	default y
+	default ARCH_DEFAULT_CRASH_DUMP
 	depends on ARCH_SUPPORTS_CRASH_DUMP
 	depends on KEXEC_CORE
 	select VMCORE_INFO

kernel/crash_core.c

@@ -503,7 +503,8 @@ int crash_check_hotplug_support(void)
 	crash_hotplug_lock();
 	/* Obtain lock while reading crash information */
 	if (!kexec_trylock()) {
-		pr_info("kexec_trylock() failed, kdump image may be inaccurate\n");
+		if (!kexec_in_progress)
+			pr_info("kexec_trylock() failed, kdump image may be inaccurate\n");
 		crash_hotplug_unlock();
 		return 0;
 	}
@@ -545,7 +546,8 @@ static void crash_handle_hotplug_event(unsigned int hp_action, unsigned int cpu,
 	crash_hotplug_lock();
 	/* Obtain lock while changing crash information */
 	if (!kexec_trylock()) {
-		pr_info("kexec_trylock() failed, kdump image may be inaccurate\n");
+		if (!kexec_in_progress)
+			pr_info("kexec_trylock() failed, kdump image may be inaccurate\n");
 		crash_hotplug_unlock();
 		return;
 	}

kernel/crash_reserve.c

@@ -132,7 +132,7 @@ static int __init parse_crashkernel_mem(char *cmdline,
 			cur++;
 			*crash_base = memparse(cur, &tmp);
 			if (cur == tmp) {
-				pr_warn("crahskernel: Memory value expected after '@'\n");
+				pr_warn("crashkernel: Memory value expected after '@'\n");
 				return -EINVAL;
 			}
 		}

kernel/kexec_core.c

@@ -210,6 +210,16 @@ int sanity_check_segment_list(struct kimage *image)
 	}
 #endif
 
+	/*
+	 * The destination addresses are searched from system RAM rather than
+	 * being allocated from the buddy allocator, so they are not guaranteed
+	 * to be accepted by the current kernel.  Accept the destination
+	 * addresses before kexec swaps their content with the segments' source
+	 * pages to avoid accessing memory before it is accepted.
+	 */
+	for (i = 0; i < nr_segments; i++)
+		accept_memory(image->segment[i].mem, image->segment[i].memsz);
+
 	return 0;
 }