linux_dsm_epyc7002/arch/powerpc/xmon
Christopher M. Riedl 0acb5f6456 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 <cmr@informatik.wtf>
Reviewed-by: Oliver O'Halloran <oohall@gmail.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
2019-05-03 02:54:57 +10:00
..
ansidecl.h
dis-asm.h [POWERPC] Make xmon disassembly optional 2006-12-04 20:40:32 +11:00
Makefile powerpc: disable KASAN instrumentation on early/critical files. 2019-05-03 01:20:26 +10:00
nonstdio.c powerpc/xmon: Paged output for paca display 2015-10-15 20:32:01 +11:00
nonstdio.h powerpc/xmon: Add __printf annotation to xmon_printf() 2018-05-25 12:04:36 +10:00
ppc-dis.c powerpc/xmon: Fix opcode being uninitialized in print_insn_powerpc 2019-02-26 23:55:22 +11:00
ppc-opc.c powerpc updates for 4.11 part 2 2017-03-01 10:10:16 -08:00
ppc.h powerpc/xmon: Enable disassembly files (compilation changes) 2017-02-15 20:02:42 +11:00
spr_access.S powerpc: move ASM_CONST and stringify_in_c() into asm-const.h 2018-07-30 22:48:16 +10:00
spu-dis.c powerpc/xmon: Add __printf annotation to xmon_printf() 2018-05-25 12:04:36 +10:00
spu-insns.h [POWERPC] Import spu disassembly code into xmon 2006-12-04 20:40:29 +11:00
spu-opc.c bug.h: add include of it to various implicit C users 2012-02-29 17:15:08 -05:00
spu.h [POWERPC] Import spu disassembly code into xmon 2006-12-04 20:40:29 +11:00
xmon.c powerpc/xmon: add read-only mode 2019-05-03 02:54:57 +10:00