docs: move powerpc under arch

and fix all in-tree references.

Architecture-specific documentation is being moved into Documentation/arch/
as a way of cleaning up the top-level documentation directory and making
the docs hierarchy more closely match the source hierarchy.

Signed-off-by: Costa Shulyupin <costa.shul@redhat.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Link: https://lore.kernel.org/r/20230826165737.2101199-1-costa.shul@redhat.com

Documentation/ABI/testing/sysfs-bus-papr-pmem

@@ -8,7 +8,7 @@ Description:
 		more bits set in the dimm-health-bitmap retrieved in
 		response to H_SCM_HEALTH hcall. The details of the bit
 		flags returned in response to this hcall is available
-		at 'Documentation/powerpc/papr_hcalls.rst' . Below are
+		at 'Documentation/arch/powerpc/papr_hcalls.rst' . Below are
 		the flags reported in this sysfs file:
 
 		* "not_armed"

Documentation/PCI/pci-error-recovery.rst

@@ -364,7 +364,7 @@ Note, however, not all failures are truly "permanent". Some are
 caused by over-heating, some by a poorly seated card. Many
 PCI error events are caused by software bugs, e.g. DMAs to
 wild addresses or bogus split transactions due to programming
-errors. See the discussion in Documentation/powerpc/eeh-pci-error-recovery.rst
+errors. See the discussion in Documentation/arch/powerpc/eeh-pci-error-recovery.rst
 for additional detail on real-life experience of the causes of
 software errors.
 
@@ -404,7 +404,7 @@ That is, the recovery API only requires that:
 .. note::
 
    Implementation details for the powerpc platform are discussed in
-   the file Documentation/powerpc/eeh-pci-error-recovery.rst
+   the file Documentation/arch/powerpc/eeh-pci-error-recovery.rst
 
    As of this writing, there is a growing list of device drivers with
    patches implementing error recovery. Not all of these patches are in

Documentation/arch/index.rst

@@ -19,7 +19,7 @@ implementation.
    nios2/index
    openrisc/index
    parisc/index
-   ../powerpc/index
+   powerpc/index
    ../riscv/index
    s390/index
    sh/index

Documentation/arch/powerpc/cxlflash.rst

@@ -32,7 +32,7 @@ Introduction
     responsible for the initialization of the adapter, setting up the
     special path for user space access, and performing error recovery. It
     communicates directly the Flash Accelerator Functional Unit (AFU)
-    as described in Documentation/powerpc/cxl.rst.
+    as described in Documentation/arch/powerpc/cxl.rst.
 
     The cxlflash driver supports two, mutually exclusive, modes of
     operation at the device (LUN) level:

Documentation/arch/powerpc/elf_hwcaps.rst

@@ -202,7 +202,7 @@ PPC_FEATURE2_VEC_CRYPTO
 
 PPC_FEATURE2_HTM_NOSC
     System calls fail if called in a transactional state, see
-    Documentation/powerpc/syscall64-abi.rst
+    Documentation/arch/powerpc/syscall64-abi.rst
 
 PPC_FEATURE2_ARCH_3_00
     The processor supports the v3.0B / v3.0C userlevel architecture. Processors
@@ -217,11 +217,11 @@ PPC_FEATURE2_DARN
 
 PPC_FEATURE2_SCV
     The scv 0 instruction may be used for system calls, see
-    Documentation/powerpc/syscall64-abi.rst.
+    Documentation/arch/powerpc/syscall64-abi.rst.
 
 PPC_FEATURE2_HTM_NO_SUSPEND
     A limited Transactional Memory facility that does not support suspend is
-    available, see Documentation/powerpc/transactional_memory.rst.
+    available, see Documentation/arch/powerpc/transactional_memory.rst.
 
 PPC_FEATURE2_ARCH_3_1
     The processor supports the v3.1 userlevel architecture. Processors

MAINTAINERS

@@ -5605,7 +5605,7 @@ M:	Andrew Donnellan <ajd@linux.ibm.com>
 L:	linuxppc-dev@lists.ozlabs.org
 S:	Supported
 F:	Documentation/ABI/testing/sysfs-class-cxl
-F:	Documentation/powerpc/cxl.rst
+F:	Documentation/arch/powerpc/cxl.rst
 F:	arch/powerpc/platforms/powernv/pci-cxl.c
 F:	drivers/misc/cxl/
 F:	include/misc/cxl*
@@ -5617,7 +5617,7 @@ M:	Matthew R. Ochs <mrochs@linux.ibm.com>
 M:	Uma Krishnan <ukrishn@linux.ibm.com>
 L:	linux-scsi@vger.kernel.org
 S:	Supported
-F:	Documentation/powerpc/cxlflash.rst
+F:	Documentation/arch/powerpc/cxlflash.rst
 F:	drivers/scsi/cxlflash/
 F:	include/uapi/scsi/cxlflash_ioctl.h
 
@@ -12103,7 +12103,7 @@ F:	Documentation/ABI/stable/sysfs-firmware-opal-*
 F:	Documentation/devicetree/bindings/i2c/i2c-opal.txt
 F:	Documentation/devicetree/bindings/powerpc/
 F:	Documentation/devicetree/bindings/rtc/rtc-opal.txt
-F:	Documentation/powerpc/
+F:	Documentation/arch/powerpc/
 F:	arch/powerpc/
 F:	drivers/*/*/*pasemi*
 F:	drivers/*/*pasemi*
@@ -16497,7 +16497,7 @@ R:	Oliver O'Halloran <oohall@gmail.com>
 L:	linuxppc-dev@lists.ozlabs.org
 S:	Supported
 F:	Documentation/PCI/pci-error-recovery.rst
-F:	Documentation/powerpc/eeh-pci-error-recovery.rst
+F:	Documentation/arch/powerpc/eeh-pci-error-recovery.rst
 F:	arch/powerpc/include/*/eeh*.h
 F:	arch/powerpc/kernel/eeh*.c
 F:	arch/powerpc/platforms/*/eeh*.c

arch/powerpc/kernel/exceptions-64s.S

@@ -893,7 +893,7 @@ __start_interrupts:
  *
  * Call convention:
  *
- * syscall register convention is in Documentation/powerpc/syscall64-abi.rst
+ * syscall register convention is in Documentation/arch/powerpc/syscall64-abi.rst
  */
 EXC_VIRT_BEGIN(system_call_vectored, 0x3000, 0x1000)
 	/* SCV 0 */
@@ -1952,8 +1952,8 @@ EXC_VIRT_NONE(0x4b00, 0x100)
  * Call convention:
  *
  * syscall and hypercalls register conventions are documented in
- * Documentation/powerpc/syscall64-abi.rst and
- * Documentation/powerpc/papr_hcalls.rst respectively.
+ * Documentation/arch/powerpc/syscall64-abi.rst and
+ * Documentation/arch/powerpc/papr_hcalls.rst respectively.
  *
  * The intersection of volatile registers that don't contain possible
  * inputs is: cr0, xer, ctr. We may use these as scratch regs upon entry

arch/powerpc/kernel/paca.c

@@ -68,7 +68,7 @@ static void *__init alloc_shared_lppaca(unsigned long size, unsigned long limit,
 		memblock_set_bottom_up(true);
 
 		/*
-		 * See Documentation/powerpc/ultravisor.rst for more details.
+		 * See Documentation/arch/powerpc/ultravisor.rst for more details.
 		 *
 		 * UV/HV data sharing is in PAGE_SIZE granularity. In order to
 		 * minimize the number of pages shared, align the allocation to

arch/powerpc/kvm/book3s_64_entry.S

@@ -19,7 +19,7 @@
 
 /*
  * This is a hcall, so register convention is as
- * Documentation/powerpc/papr_hcalls.rst.
+ * Documentation/arch/powerpc/papr_hcalls.rst.
  *
  * This may also be a syscall from PR-KVM userspace that is to be
  * reflected to the PR guest kernel, so registers may be set up for

drivers/soc/fsl/qe/qe.c

@@ -430,7 +430,7 @@ static void qe_upload_microcode(const void *base,
 /*
  * Upload a microcode to the I-RAM at a specific address.
  *
- * See Documentation/powerpc/qe_firmware.rst for information on QE microcode
+ * See Documentation/arch/powerpc/qe_firmware.rst for information on QE microcode
  * uploading.
  *
  * Currently, only version 1 is supported, so the 'version' field must be

drivers/tty/hvc/hvcs.c

@@ -47,7 +47,7 @@
  * using the 2.6 Linux kernel kref construct.
  *
  * For direction on installation and usage of this driver please reference
- * Documentation/powerpc/hvcs.rst.
+ * Documentation/arch/powerpc/hvcs.rst.
  */
 
 #include <linux/device.h>

include/soc/fsl/qe/qe.h

@@ -258,7 +258,7 @@ static inline int qe_alive_during_sleep(void)
 
 /* Structure that defines QE firmware binary files.
  *
- * See Documentation/powerpc/qe_firmware.rst for a description of these
+ * See Documentation/arch/powerpc/qe_firmware.rst for a description of these
  * fields.
  */
 struct qe_firmware {