Commit d9838d86 authored by Bodo Stroesser's avatar Bodo Stroesser Committed by Linus Torvalds

[PATCH] uml: allow host capability usage to be disabled

Add new cmdline setups:
  - noprocmm
  - noptracefaultinfo
In case of testing, they can be used to switch off usage of
/proc/mm and PTRACE_FAULTINFO independently.
Signed-off-by: default avatarBodo Stroesser <bstroesser@fujitsu-siemens.com>
Signed-off-by: default avatarJeff Dike <jdike@addtoit.com>
Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
parent 07bf731e
...@@ -275,6 +275,30 @@ void os_early_checks(void) ...@@ -275,6 +275,30 @@ void os_early_checks(void)
check_ptrace(); check_ptrace();
} }
static int __init noprocmm_cmd_param(char *str, int* add)
{
proc_mm = 0;
return 0;
}
__uml_setup("noprocmm", noprocmm_cmd_param,
"noprocmm\n"
" Turns off usage of /proc/mm, even if host supports it.\n"
" To support /proc/mm, the host needs to be patched using\n"
" the current skas3 patch.\n\n");
static int __init noptracefaultinfo_cmd_param(char *str, int* add)
{
ptrace_faultinfo = 0;
return 0;
}
__uml_setup("noptracefaultinfo", noptracefaultinfo_cmd_param,
"noptracefaultinfo\n"
" Turns off usage of PTRACE_FAULTINFO, even if host supports\n"
" it. To support PTRACE_FAULTINFO, the host needs to be patched\n"
" using the current skas3 patch.\n\n");
#ifdef UML_CONFIG_MODE_SKAS #ifdef UML_CONFIG_MODE_SKAS
static inline void check_skas3_ptrace_support(void) static inline void check_skas3_ptrace_support(void)
{ {
......
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