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| author | Michael Mueller <mimu@linux.vnet.ibm.com> | 2014-05-13 18:58:30 +0400 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-05-16 16:57:31 +0400 |
| commit | fda902cb8347da121025c4079b9e87748228a27e (patch) | |
| tree | b5cbcce14afbe2da194e4b3cb8f1594cea800fb5 /arch/s390/kvm/kvm-s390.h | |
| parent | 570126d370e9c018e603d63272ebcf7340efc05b (diff) | |
| download | linux-fda902cb8347da121025c4079b9e87748228a27e.tar.xz | |
KVM: s390: split SIE state guest prefix field
This patch splits the SIE state guest prefix at offset 4
into a prefix bit field. Additionally it provides the
access functions:
- kvm_s390_get_prefix()
- kvm_s390_set_prefix()
to access the prefix per vcpu.
Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/kvm-s390.h')
| -rw-r--r-- | arch/s390/kvm/kvm-s390.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h index 87edfc919db9..a8655ed31616 100644 --- a/arch/s390/kvm/kvm-s390.h +++ b/arch/s390/kvm/kvm-s390.h @@ -61,9 +61,15 @@ static inline int kvm_is_ucontrol(struct kvm *kvm) #endif } +#define GUEST_PREFIX_SHIFT 13 +static inline u32 kvm_s390_get_prefix(struct kvm_vcpu *vcpu) +{ + return vcpu->arch.sie_block->prefix << GUEST_PREFIX_SHIFT; +} + static inline void kvm_s390_set_prefix(struct kvm_vcpu *vcpu, u32 prefix) { - vcpu->arch.sie_block->prefix = prefix & 0x7fffe000u; + vcpu->arch.sie_block->prefix = prefix >> GUEST_PREFIX_SHIFT; vcpu->arch.sie_block->ihcpu = 0xffff; kvm_make_request(KVM_REQ_MMU_RELOAD, vcpu); } |