diff options
| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2017-06-07 13:45:22 +0300 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2017-06-22 13:41:06 +0300 |
| commit | 6ae1574c2a24eec5efa8bac305a8f87c839acc64 (patch) | |
| tree | 186dbaa684e7575b718783b1c1486f92653d365a /arch/s390/include | |
| parent | 4036e3874a1ce41a4f7267289f9a0d8e5cd49408 (diff) | |
| download | linux-6ae1574c2a24eec5efa8bac305a8f87c839acc64.tar.xz | |
KVM: s390: implement instruction execution protection for emulated
ifetch
While currently only used to fetch the original instruction on failure
for getting the instruction length code, we should make the page table
walking code future proof.
Suggested-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/include')
| -rw-r--r-- | arch/s390/include/asm/ctl_reg.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/s390/include/asm/ctl_reg.h b/arch/s390/include/asm/ctl_reg.h index d0441ad2a990..e508dff92535 100644 --- a/arch/s390/include/asm/ctl_reg.h +++ b/arch/s390/include/asm/ctl_reg.h @@ -59,7 +59,9 @@ union ctlreg0 { unsigned long lap : 1; /* Low-address-protection control */ unsigned long : 4; unsigned long edat : 1; /* Enhanced-DAT-enablement control */ - unsigned long : 4; + unsigned long : 2; + unsigned long iep : 1; /* Instruction-Execution-Protection */ + unsigned long : 1; unsigned long afp : 1; /* AFP-register control */ unsigned long vx : 1; /* Vector enablement control */ unsigned long : 7; |