81c4b5bf30
Hotplug drivers cannot declare their hotplug_slot_ops const, making them attractive targets for attackers, because upon registration of a hotplug slot, __pci_hp_initialize() writes to the "owner" and "mod_name" members in that struct. Fix by moving these members to struct hotplug_slot and constify every driver's hotplug_slot_ops except for pciehp. pciehp constructs its hotplug_slot_ops at runtime based on the PCIe port's capabilities, hence cannot declare them const. It can be converted to __write_rarely once that's mainlined: http://www.openwall.com/lists/kernel-hardening/2016/11/16/3 Signed-off-by: Lukas Wunner <lukas@wunner.de> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Acked-by: Tyrel Datwyler <tyreld@linux.vnet.ibm.com> # drivers/pci/hotplug/rpa* Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com> # drivers/platform/x86 Cc: Len Brown <lenb@kernel.org> Cc: Scott Murray <scott@spiteful.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: Oliver OHalloran <oliveroh@au1.ibm.com> Cc: Gavin Shan <gwshan@linux.vnet.ibm.com> Cc: Sebastian Ott <sebott@linux.vnet.ibm.com> Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com> Cc: Corentin Chary <corentin.chary@gmail.com> Cc: Darren Hart <dvhart@infradead.org>
94 lines
2.2 KiB
C
94 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
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*
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* Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
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*
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* All rights reserved.
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*
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* Send feedback to <lxie@us.ibm.com>,
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*
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*/
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#ifndef _PPC64PHP_H
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#define _PPC64PHP_H
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#include <linux/pci.h>
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#include <linux/pci_hotplug.h>
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#define DR_INDICATOR 9002
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#define DR_ENTITY_SENSE 9003
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#define POWER_ON 100
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#define POWER_OFF 0
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#define LED_OFF 0
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#define LED_ON 1 /* continuous on */
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#define LED_ID 2 /* slow blinking */
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#define LED_ACTION 3 /* fast blinking */
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/* Sensor values from rtas_get-sensor */
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#define EMPTY 0 /* No card in slot */
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#define PRESENT 1 /* Card in slot */
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#define MY_NAME "rpaphp"
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extern bool rpaphp_debug;
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#define dbg(format, arg...) \
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do { \
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if (rpaphp_debug) \
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printk(KERN_DEBUG "%s: " format, \
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MY_NAME, ## arg); \
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} while (0)
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#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME, ## arg)
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#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME, ## arg)
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#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME, ## arg)
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/* slot states */
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#define NOT_VALID 3
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#define NOT_CONFIGURED 2
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#define CONFIGURED 1
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#define EMPTY 0
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/* DRC constants */
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#define MAX_DRC_NAME_LEN 64
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/*
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* struct slot - slot information for each *physical* slot
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*/
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struct slot {
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struct list_head rpaphp_slot_list;
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int state;
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u32 index;
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u32 type;
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u32 power_domain;
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char *name;
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struct device_node *dn;
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struct pci_bus *bus;
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struct list_head *pci_devs;
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struct hotplug_slot *hotplug_slot;
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};
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extern const struct hotplug_slot_ops rpaphp_hotplug_slot_ops;
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extern struct list_head rpaphp_slot_head;
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/* function prototypes */
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/* rpaphp_pci.c */
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int rpaphp_enable_slot(struct slot *slot);
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int rpaphp_get_sensor_state(struct slot *slot, int *state);
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/* rpaphp_core.c */
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int rpaphp_add_slot(struct device_node *dn);
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int rpaphp_check_drc_props(struct device_node *dn, char *drc_name,
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char *drc_type);
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/* rpaphp_slot.c */
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void dealloc_slot_struct(struct slot *slot);
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struct slot *alloc_slot_struct(struct device_node *dn, int drc_index, char *drc_name, int power_domain);
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int rpaphp_register_slot(struct slot *slot);
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int rpaphp_deregister_slot(struct slot *slot);
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#endif /* _PPC64PHP_H */
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