From eaee9424a120c289abc3eeeff331cb0d45efe971 Mon Sep 17 00:00:00 2001 From: Samuel Thibault Date: Thu, 9 Jul 2015 14:13:25 +0200 Subject: Allow non-privileged tasks to wire 64KiB task memory * doc/mach.texi (vm_wire): Document that the host port does not have to be privileged. * include/mach/mach_hosts.defs (vm_wire): Use mach_port_t instead of host_priv_t. * vm/vm_map.h (vm_map): Add user_wired field. * vm/vm_map.c (vm_map_setup): Initialize user_wired field to 0. (vm_map_pageable_common, vm_map_entry_delete, vm_map_copy_overwrite, vm_map_copyout_page_list, vm_map_copyin_page_list): When switching user_wired_count field of entry between 0 and non-0, accumulate the corresponding size into the user_wired field of map. * vm/vm_user.c (vm_wire): Turn host parameter into port parameter, and inline a version of convert_port_to_host_priv which records whether the host port is privileged or not. When it is not privileged, check whether the additional amount to user_wired will overcome 64KiB. --- vm/vm_map.h | 1 + 1 file changed, 1 insertion(+) (limited to 'vm/vm_map.h') diff --git a/vm/vm_map.h b/vm/vm_map.h index fc7730a..9b31f90 100644 --- a/vm/vm_map.h +++ b/vm/vm_map.h @@ -170,6 +170,7 @@ struct vm_map { #define max_offset hdr.links.end /* end of range */ pmap_t pmap; /* Physical map */ vm_size_t size; /* virtual size */ + vm_size_t user_wired; /* wired by user size */ int ref_count; /* Reference count */ decl_simple_lock_data(, ref_lock) /* Lock for ref_count field */ vm_map_entry_t hint; /* hint for quick lookups */ -- cgit v1.2.3