From: Christian Borntraeger <[email protected]> The prefix register is a read-mostly value that is necessary to emulate memory accesses in an architecture compliant-way. Avoid an additional ioctl by providing the prefix content in the r/o section of kvm_run.
Signed-off-by: Christian Borntraeger <[email protected]> --- arch/s390/include/asm/kvm.h | 1 + arch/s390/kvm/kvm-s390.c | 2 ++ 2 files changed, 3 insertions(+) Index: b/arch/s390/include/asm/kvm.h =================================================================== --- a/arch/s390/include/asm/kvm.h +++ b/arch/s390/include/asm/kvm.h @@ -43,6 +43,7 @@ struct kvm_guest_debug_arch { /* definition of registers in kvm_run */ struct sync_ro_regs { + __u32 prefix; /* prefix register */ }; struct sync_rw_regs { Index: b/arch/s390/kvm/kvm-s390.c =================================================================== --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -129,6 +129,7 @@ int kvm_dev_ioctl_check_extension(long e case KVM_CAP_S390_PSW: case KVM_CAP_S390_GMAP: case KVM_CAP_SYNC_MMU: + case KVM_CAP_SYNC_REGS: r = 1; break; default: @@ -556,6 +557,7 @@ rerun_vcpu: kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; + kvm_run->sync_ro_regs.prefix = vcpu->arch.sie_block->prefix; if (vcpu->sigset_active) sigprocmask(SIG_SETMASK, &sigsaved, NULL); -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
