Finally use epsw to create a complete psw mask within pt_regs. Without
this only some bits are correct, while other bits are (incorrectly)
always zero.
The epsw instruction is quite heavy weight, however given that this
only effects ftrace_regs_caller this seems to be the right thing, so
we finally get a complete psw mask for ftrace kprobed functions.
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
stg %r14,(__SF_GPRS+8*8)(%r15) # save traced function caller
.if \allregs == 1
- lghi %r14,0 # save condition code
- ipm %r14 # don't put any instructions
- sllg %r14,%r14,16 # clobbering CC before this point
+ # save psw mask
+ # don't put any instructions clobbering CC before this point
+#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
+ epsw %r1,%r14
+ risbg %r14,%r1,0,31,32
+#else
+ epsw %r14,%r1
+ sllg %r14,%r14,32
+ lr %r14,%r1
+#endif
.endif
lgr %r1,%r15
.if \allregs == 1
stg %r14,(STACK_PTREGS_PSW)(%r15)
- stosm (STACK_PTREGS_PSW)(%r15),0
#ifdef CONFIG_HAVE_MARCH_Z10_FEATURES
mvghi STACK_PTREGS_FLAGS(%r15),_PIF_FTRACE_FULL_REGS
#else