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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2012-01-11 11:20:31 +0100 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2012-03-05 14:52:22 +0200 |
| commit | 60b413c9248495ea400e80e08e4d1e28ed7ee05e (patch) | |
| tree | 37881e9b94d7d736caf04c577f47b555fd34d7ff /arch/s390 | |
| parent | b9e5dc8d4511e6a00862a795319569e7fe7f60f4 (diff) | |
| download | op-kernel-dev-60b413c9248495ea400e80e08e4d1e28ed7ee05e.zip op-kernel-dev-60b413c9248495ea400e80e08e4d1e28ed7ee05e.tar.gz | |
KVM: s390: provide the prefix register via kvm_run
Add the prefix register to the synced register field in kvm_run.
While we need the prefix register most of the time read-only, this
patch also adds handling for guest dirtying of the prefix register.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/kvm.h | 2 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 7 |
2 files changed, 9 insertions, 0 deletions
diff --git a/arch/s390/include/asm/kvm.h b/arch/s390/include/asm/kvm.h index 325560a..9fc328c 100644 --- a/arch/s390/include/asm/kvm.h +++ b/arch/s390/include/asm/kvm.h @@ -41,7 +41,9 @@ struct kvm_debug_exit_arch { struct kvm_guest_debug_arch { }; +#define KVM_SYNC_PREFIX (1UL << 0) /* definition of registers in kvm_run */ struct kvm_sync_regs { + __u64 prefix; /* prefix register */ }; #endif diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 1868b89..6962c1b 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -132,6 +132,7 @@ int kvm_dev_ioctl_check_extension(long ext) #ifdef CONFIG_KVM_S390_UCONTROL case KVM_CAP_S390_UCONTROL: #endif + case KVM_CAP_SYNC_REGS: r = 1; break; default: @@ -288,6 +289,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) } vcpu->arch.gmap = vcpu->kvm->arch.gmap; + vcpu->run->kvm_valid_regs = KVM_SYNC_PREFIX; return 0; } @@ -572,6 +574,10 @@ rerun_vcpu: vcpu->arch.sie_block->gpsw.mask = kvm_run->psw_mask; vcpu->arch.sie_block->gpsw.addr = kvm_run->psw_addr; + if (kvm_run->kvm_dirty_regs & KVM_SYNC_PREFIX) { + kvm_run->kvm_dirty_regs &= ~KVM_SYNC_PREFIX; + kvm_s390_set_prefix(vcpu, kvm_run->s.regs.prefix); + } might_fault(); @@ -620,6 +626,7 @@ rerun_vcpu: kvm_run->psw_mask = vcpu->arch.sie_block->gpsw.mask; kvm_run->psw_addr = vcpu->arch.sie_block->gpsw.addr; + kvm_run->s.regs.prefix = vcpu->arch.sie_block->prefix; if (vcpu->sigset_active) sigprocmask(SIG_SETMASK, &sigsaved, NULL); |
