[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: Bodo Stroesser <bstroesser@fujitsu-siemens.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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@ -275,6 +275,30 @@ void os_early_checks(void)
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check_ptrace();
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}
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static int __init noprocmm_cmd_param(char *str, int* add)
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{
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proc_mm = 0;
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return 0;
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}
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__uml_setup("noprocmm", noprocmm_cmd_param,
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"noprocmm\n"
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" Turns off usage of /proc/mm, even if host supports it.\n"
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" To support /proc/mm, the host needs to be patched using\n"
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" the current skas3 patch.\n\n");
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static int __init noptracefaultinfo_cmd_param(char *str, int* add)
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{
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ptrace_faultinfo = 0;
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return 0;
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}
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__uml_setup("noptracefaultinfo", noptracefaultinfo_cmd_param,
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"noptracefaultinfo\n"
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" Turns off usage of PTRACE_FAULTINFO, even if host supports\n"
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" it. To support PTRACE_FAULTINFO, the host needs to be patched\n"
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" using the current skas3 patch.\n\n");
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#ifdef UML_CONFIG_MODE_SKAS
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static inline void check_skas3_ptrace_support(void)
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{
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