diff options
| author | Christopher M. Riedl <[email protected]> | 2019-04-15 22:26:38 -0500 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2019-05-03 02:54:57 +1000 |
| commit | 0acb5f64560a052fd66ab37b212a72964847160f (patch) | |
| tree | 51ab809e5bc5f343e540f4496d2c7af8a60e9847 /net/switchdev/switchdev.c | |
| parent | 5d085ec04a000fefb5182d3b03ee46ca96d8389b (diff) | |
powerpc/xmon: add read-only mode
Operations which write to memory and special purpose registers should be
restricted on systems with integrity guarantees (such as Secure Boot)
and, optionally, to avoid self-destructive behaviors.
Add a config option, XMON_DEFAULT_RO_MODE, to set default xmon behavior.
The kernel cmdline options xmon=ro and xmon=rw override this default.
The following xmon operations are affected:
memops:
disable memmove
disable memset
disable memzcan
memex:
no-op'd mwrite
super_regs:
no-op'd write_spr
bpt_cmds:
disable
proc_call:
disable
Signed-off-by: Christopher M. Riedl <[email protected]>
Reviewed-by: Oliver O'Halloran <[email protected]>
Reviewed-by: Andrew Donnellan <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Diffstat (limited to 'net/switchdev/switchdev.c')
0 files changed, 0 insertions, 0 deletions