Merge: Rebase kexec/kdump to upstream kernel v6.5

MR: https://gitlab.com/redhat/centos-stream/src/kernel/centos-stream-9/-/merge_requests/4053

```
JIRA: https://issues.redhat.com/browse/RHEL-32199
Upstream Status: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git

This rebase kexec/kdump of rhel9 kernel to v6.5 of mainline kernel. This is for rhel9.5. Last time rebase was done in rhel9.2 and synchronized to v6.0.

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

Approved-by: Vladis Dronov <vdronov@redhat.com>
Approved-by: Rafael Aquini <aquini@redhat.com>
Approved-by: Lenny Szubowicz <lszubowi@redhat.com>
Approved-by: Lichen Liu <lichliu@redhat.com>
Approved-by: Tao Liu <ltao@redhat.com>
Approved-by: Pingfan Liu <piliu@redhat.com>
Approved-by: CKI KWF Bot <cki-ci-bot+kwf-gitlab-com@redhat.com>

Merged-by: Lucas Zampieri <lzampier@redhat.com>

Author: zampierilucas

Documentation/admin-guide/kdump/vmcoreinfo.rst

@@ -494,6 +494,14 @@ architecture which is used to lookup the page-tables for the Virtual
 addresses in the higher VA range (refer to ARMv8 ARM document for
 more details).
 
+MODULES_VADDR|MODULES_END|VMALLOC_START|VMALLOC_END|VMEMMAP_START|VMEMMAP_END
+-----------------------------------------------------------------------------
+
+Used to get the correct ranges:
+	MODULES_VADDR ~ MODULES_END-1 : Kernel module space.
+	VMALLOC_START ~ VMALLOC_END-1 : vmalloc() / ioremap() space.
+	VMEMMAP_START ~ VMEMMAP_END-1 : vmemmap region, used for struct page array.
+
 arm
 ===
 

Documentation/admin-guide/sysctl/kernel.rst

@@ -473,16 +473,35 @@ io_uring instances.
 kexec_load_disabled
 ===================
 
-A toggle indicating if the ``kexec_load`` syscall has been disabled.
-This value defaults to 0 (false: ``kexec_load`` enabled), but can be
-set to 1 (true: ``kexec_load`` disabled).
+A toggle indicating if the syscalls ``kexec_load`` and
+``kexec_file_load`` have been disabled.
+This value defaults to 0 (false: ``kexec_*load`` enabled), but can be
+set to 1 (true: ``kexec_*load`` disabled).
 Once true, kexec can no longer be used, and the toggle cannot be set
 back to false.
 This allows a kexec image to be loaded before disabling the syscall,
 allowing a system to set up (and later use) an image without it being
 altered.
 Generally used together with the `modules_disabled`_ sysctl.
 
+kexec_load_limit_panic
+======================
+
+This parameter specifies a limit to the number of times the syscalls
+``kexec_load`` and ``kexec_file_load`` can be called with a crash
+image. It can only be set with a more restrictive value than the
+current one.
+
+== ======================================================
+-1 Unlimited calls to kexec. This is the default setting.
+N  Number of calls left.
+== ======================================================
+
+kexec_load_limit_reboot
+=======================
+
+Similar functionality as ``kexec_load_limit_panic``, but for a normal
+image.
 
 kptr_restrict
 =============

arch/arm/kernel/machine_kexec.c

@@ -73,7 +73,7 @@ void machine_kexec_cleanup(struct kimage *image)
 {
 }
 
-void machine_crash_nonpanic_core(void *unused)
+static void machine_crash_nonpanic_core(void *unused)
 {
 	struct pt_regs regs;
 

arch/arm64/Kconfig

@@ -1586,7 +1586,7 @@ config ARM64_TAGGED_ADDR_ABI
 	  When this option is enabled, user applications can opt in to a
 	  relaxed ABI via prctl() allowing tagged addresses to be passed
 	  to system calls as pointer arguments. For details, see
-	  Documentation/arm64/tagged-address-abi.rst.
+	  Documentation/arch/arm64/tagged-address-abi.rst.
 
 menuconfig COMPAT
 	bool "Kernel support for 32-bit EL0"
@@ -2047,7 +2047,7 @@ config ARM64_MTE
 	  explicitly opt in. The mechanism for the userspace is
 	  described in:
 
-	  Documentation/arm64/memory-tagging-extension.rst.
+	  Documentation/arch/arm64/memory-tagging-extension.rst.
 
 endmenu # "ARMv8.5 architectural features"
 

arch/arm64/include/asm/efi.h

@@ -88,7 +88,7 @@ efi_status_t __efi_rt_asm_wrapper(void *, const char *, ...);
  * guaranteed to cover the kernel Image.
  *
  * Since the EFI stub is part of the kernel Image, we can relax the
- * usual requirements in Documentation/arm64/booting.rst, which still
+ * usual requirements in Documentation/arch/arm64/booting.rst, which still
  * apply to other bootloaders, and are required for some kernel
  * configurations.
  */

arch/arm64/include/asm/image.h

@@ -27,7 +27,7 @@
 
 /*
  * struct arm64_image_header - arm64 kernel image header
- * See Documentation/arm64/booting.rst for details
+ * See Documentation/arch/arm64/booting.rst for details
  *
  * @code0:		Executable code, or
  *   @mz_header		  alternatively used for part of MZ header

arch/arm64/include/uapi/asm/sigcontext.h

@@ -173,7 +173,7 @@ struct zt_context {
  * vector length beyond its initial architectural limit of 2048 bits
  * (16 quadwords).
  *
- * See linux/Documentation/arm64/sve.rst for a description of the VL/VQ
+ * See linux/Documentation/arch/arm64/sve.rst for a description of the VL/VQ
  * terminology.
  */
 #define SVE_VQ_BYTES		__SVE_VQ_BYTES	/* bytes per quadword */

arch/arm64/kernel/crash_core.c

@@ -21,6 +21,12 @@ void arch_crash_save_vmcoreinfo(void)
 {
 	VMCOREINFO_NUMBER(VA_BITS);
 	/* Please note VMCOREINFO_NUMBER() uses "%d", not "%x" */
+	vmcoreinfo_append_str("NUMBER(MODULES_VADDR)=0x%lx\n", MODULES_VADDR);
+	vmcoreinfo_append_str("NUMBER(MODULES_END)=0x%lx\n", MODULES_END);
+	vmcoreinfo_append_str("NUMBER(VMALLOC_START)=0x%lx\n", VMALLOC_START);
+	vmcoreinfo_append_str("NUMBER(VMALLOC_END)=0x%lx\n", VMALLOC_END);
+	vmcoreinfo_append_str("NUMBER(VMEMMAP_START)=0x%lx\n", VMEMMAP_START);
+	vmcoreinfo_append_str("NUMBER(VMEMMAP_END)=0x%lx\n", VMEMMAP_END);
 	vmcoreinfo_append_str("NUMBER(kimage_voffset)=0x%llx\n",
 						kimage_voffset);
 	vmcoreinfo_append_str("NUMBER(PHYS_OFFSET)=0x%llx\n",

arch/arm64/kernel/kexec_image.c

@@ -48,7 +48,7 @@ static void *image_load(struct kimage *image,
 
 	/*
 	 * We require a kernel with an unambiguous Image header. Per
-	 * Documentation/arm64/booting.rst, this is the case when image_size
+	 * Documentation/arch/arm64/booting.rst, this is the case when image_size
 	 * is non-zero (practically speaking, since v3.17).
 	 */
 	h = (struct arm64_image_header *)kernel;

arch/powerpc/kexec/file_load_64.c

@@ -38,7 +38,7 @@ struct umem_info {
 
 	/* usable memory ranges to look up */
 	unsigned int nr_ranges;
-	const struct crash_mem_range *ranges;
+	const struct range *ranges;
 };
 
 const struct kexec_file_ops * const kexec_file_loaders[] = {