Merge tag 'powerpc-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc updates from Michael Ellerman:
 "This is a bit late, partly due to me travelling, and partly due to a
  power outage knocking out some of my test systems *while* I was
  travelling.

   - Initial support for running on a system with an Ultravisor, which
     is software that runs below the hypervisor and protects guests
     against some attacks by the hypervisor.

   - Support for building the kernel to run as a "Secure Virtual
     Machine", ie. as a guest capable of running on a system with an
     Ultravisor.

   - Some changes to our DMA code on bare metal, to allow devices with
     medium sized DMA masks (> 32 && < 59 bits) to use more than 2GB of
     DMA space.

   - Support for firmware assisted crash dumps on bare metal (powernv).

   - Two series fixing bugs in and refactoring our PCI EEH code.

   - A large series refactoring our exception entry code to use gas
     macros, both to make it more readable and also enable some future
     optimisations.

  As well as many cleanups and other minor features & fixups.

  Thanks to: Adam Zerella, Alexey Kardashevskiy, Alistair Popple, Andrew
  Donnellan, Aneesh Kumar K.V, Anju T Sudhakar, Anshuman Khandual,
  Balbir Singh, Benjamin Herrenschmidt, Cédric Le Goater, Christophe
  JAILLET, Christophe Leroy, Christopher M. Riedl, Christoph Hellwig,
  Claudio Carvalho, Daniel Axtens, David Gibson, David Hildenbrand,
  Desnes A. Nunes do Rosario, Ganesh Goudar, Gautham R. Shenoy, Greg
  Kurz, Guerney Hunt, Gustavo Romero, Halil Pasic, Hari Bathini, Joakim
  Tjernlund, Jonathan Neuschafer, Jordan Niethe, Leonardo Bras, Lianbo
  Jiang, Madhavan Srinivasan, Mahesh Salgaonkar, Mahesh Salgaonkar,
  Masahiro Yamada, Maxiwell S. Garcia, Michael Anderson, Nathan
  Chancellor, Nathan Lynch, Naveen N. Rao, Nicholas Piggin, Oliver
  O'Halloran, Qian Cai, Ram Pai, Ravi Bangoria, Reza Arbab, Ryan Grimm,
  Sam Bobroff, Santosh Sivaraj, Segher Boessenkool, Sukadev Bhattiprolu,
  Thiago Bauermann, Thiago Jung Bauermann, Thomas Gleixner, Tom
  Lendacky, Vasant Hegde"

* tag 'powerpc-5.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (264 commits)
  powerpc/mm/mce: Keep irqs disabled during lockless page table walk
  powerpc: Use ftrace_graph_ret_addr() when unwinding
  powerpc/ftrace: Enable HAVE_FUNCTION_GRAPH_RET_ADDR_PTR
  ftrace: Look up the address of return_to_handler() using helpers
  powerpc: dump kernel log before carrying out fadump or kdump
  docs: powerpc: Add missing documentation reference
  powerpc/xmon: Fix output of XIVE IPI
  powerpc/xmon: Improve output of XIVE interrupts
  powerpc/mm/radix: remove useless kernel messages
  powerpc/fadump: support holes in kernel boot memory area
  powerpc/fadump: remove RMA_START and RMA_END macros
  powerpc/fadump: update documentation about option to release opalcore
  powerpc/fadump: consider f/w load area
  powerpc/opalcore: provide an option to invalidate /sys/firmware/opal/core file
  powerpc/opalcore: export /sys/firmware/opal/core for analysing opal crashes
  powerpc/fadump: update documentation about CONFIG_PRESERVE_FA_DUMP
  powerpc/fadump: add support to preserve crash data on FADUMP disabled kernel
  powerpc/fadump: improve how crashed kernel's memory is reserved
  powerpc/fadump: consider reserved ranges while releasing memory
  powerpc/fadump: make crash memory ranges array allocation generic
  ...

1 files changed, 0 insertions, 223 deletions

diff --git a/arch/powerpc/sysdev/scom.c b/arch/powerpc/sysdev/scom.c
deleted file mode 100644
index 94e885bf3aee..000000000000
--- a/arch/powerpc/sysdev/scom.c
+++ /dev/null
@@ -1,223 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright 2010 Benjamin Herrenschmidt, IBM Corp
- *                <[email protected]>
- *     and        David Gibson, IBM Corporation.
- */
-
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/export.h>
-#include <asm/debugfs.h>
-#include <asm/prom.h>
-#include <asm/scom.h>
-#include <linux/uaccess.h>
-
-const struct scom_controller *scom_controller;
-EXPORT_SYMBOL_GPL(scom_controller);
-
-struct device_node *scom_find_parent(struct device_node *node)
-{
-	struct device_node *par, *tmp;
-	const u32 *p;
-
-	for (par = of_node_get(node); par;) {
-		if (of_get_property(par, "scom-controller", NULL))
-			break;
-		p = of_get_property(par, "scom-parent", NULL);
-		tmp = par;
-		if (p == NULL)
-			par = of_get_parent(par);
-		else
-			par = of_find_node_by_phandle(*p);
-		of_node_put(tmp);
-	}
-	return par;
-}
-EXPORT_SYMBOL_GPL(scom_find_parent);
-
-scom_map_t scom_map_device(struct device_node *dev, int index)
-{
-	struct device_node *parent;
-	unsigned int cells, size;
-	const __be32 *prop, *sprop;
-	u64 reg, cnt;
-	scom_map_t ret;
-
-	parent = scom_find_parent(dev);
-
-	if (parent == NULL)
-		return NULL;
-
-	/*
-	 * We support "scom-reg" properties for adding scom registers
-	 * to a random device-tree node with an explicit scom-parent
-	 *
-	 * We also support the simple "reg" property if the device is
-	 * a direct child of a scom controller.
-	 *
-	 * In case both exist, "scom-reg" takes precedence.
-	 */
-	prop = of_get_property(dev, "scom-reg", &size);
-	sprop = of_get_property(parent, "#scom-cells", NULL);
-	if (!prop && parent == dev->parent) {
-		prop = of_get_property(dev, "reg", &size);
-		sprop = of_get_property(parent, "#address-cells", NULL);
-	}
-	if (!prop)
-		return NULL;
-	cells = sprop ? be32_to_cpup(sprop) : 1;
-	size >>= 2;
-
-	if (index >= (size / (2*cells)))
-		return NULL;
-
-	reg = of_read_number(&prop[index * cells * 2], cells);
-	cnt = of_read_number(&prop[index * cells * 2 + cells], cells);
-
-	ret = scom_map(parent, reg, cnt);
-	of_node_put(parent);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(scom_map_device);
-
-#ifdef CONFIG_SCOM_DEBUGFS
-struct scom_debug_entry {
-	struct device_node *dn;
-	struct debugfs_blob_wrapper path;
-	char name[16];
-};
-
-static ssize_t scom_debug_read(struct file *filp, char __user *ubuf,
-			       size_t count, loff_t *ppos)
-{
-	struct scom_debug_entry *ent = filp->private_data;
-	u64 __user *ubuf64 = (u64 __user *)ubuf;
-	loff_t off = *ppos;
-	ssize_t done = 0; 
-	u64 reg, reg_cnt, val;
-	scom_map_t map;
-	int rc;
-
-	if (off < 0 || (off & 7) || (count & 7))
-		return -EINVAL;
-	reg = off >> 3;
-	reg_cnt = count >> 3;
-
-	map = scom_map(ent->dn, reg, reg_cnt);
-	if (!scom_map_ok(map))
-		return -ENXIO;
-
-	for (reg = 0; reg < reg_cnt; reg++) {
-		rc = scom_read(map, reg, &val);
-		if (!rc)
-			rc = put_user(val, ubuf64);
-		if (rc) {
-			if (!done)
-				done = rc;
-			break;
-		}
-		ubuf64++;
-		*ppos += 8;
-		done += 8;
-	}
-	scom_unmap(map);
-	return done;
-}
-
-static ssize_t scom_debug_write(struct file* filp, const char __user *ubuf,
-				size_t count, loff_t *ppos)
-{
-	struct scom_debug_entry *ent = filp->private_data;
-	u64 __user *ubuf64 = (u64 __user *)ubuf;
-	loff_t off = *ppos;
-	ssize_t done = 0; 
-	u64 reg, reg_cnt, val;
-	scom_map_t map;
-	int rc;
-
-	if (off < 0 || (off & 7) || (count & 7))
-		return -EINVAL;
-	reg = off >> 3;
-	reg_cnt = count >> 3;
-
-	map = scom_map(ent->dn, reg, reg_cnt);
-	if (!scom_map_ok(map))
-		return -ENXIO;
-
-	for (reg = 0; reg < reg_cnt; reg++) {
-		rc = get_user(val, ubuf64);
-		if (!rc)
-			rc = scom_write(map, reg,  val);
-		if (rc) {
-			if (!done)
-				done = rc;
-			break;
-		}
-		ubuf64++;
-		done += 8;
-	}
-	scom_unmap(map);
-	return done;
-}
-
-static const struct file_operations scom_debug_fops = {
-	.read =		scom_debug_read,
-	.write =	scom_debug_write,
-	.open =		simple_open,
-	.llseek =	default_llseek,
-};
-
-static int scom_debug_init_one(struct dentry *root, struct device_node *dn,
-			       int i)
-{
-	struct scom_debug_entry *ent;
-	struct dentry *dir;
-
-	ent = kzalloc(sizeof(*ent), GFP_KERNEL);
-	if (!ent)
-		return -ENOMEM;
-
-	ent->dn = of_node_get(dn);
-	snprintf(ent->name, 16, "%08x", i);
-	ent->path.data = (void*)kasprintf(GFP_KERNEL, "%pOF", dn);
-	ent->path.size = strlen((char *)ent->path.data);
-
-	dir = debugfs_create_dir(ent->name, root);
-	if (!dir) {
-		of_node_put(dn);
-		kfree(ent->path.data);
-		kfree(ent);
-		return -1;
-	}
-
-	debugfs_create_blob("devspec", 0400, dir, &ent->path);
-	debugfs_create_file("access", 0600, dir, ent, &scom_debug_fops);
-
-	return 0;
-}
-
-static int scom_debug_init(void)
-{
-	struct device_node *dn;
-	struct dentry *root;
-	int i, rc;
-
-	root = debugfs_create_dir("scom", powerpc_debugfs_root);
-	if (!root)
-		return -1;
-
-	i = rc = 0;
-	for_each_node_with_property(dn, "scom-controller") {
-		int id = of_get_ibm_chip_id(dn);
-		if (id == -1)
-			id = i;
-		rc |= scom_debug_init_one(root, dn, id);
-		i++;
-	}
-
-	return rc;
-}
-device_initcall(scom_debug_init);
-#endif /* CONFIG_SCOM_DEBUGFS */