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| author | Carsten Otte <cotte@de.ibm.com> | 2012-05-15 14:15:27 +0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2012-05-17 21:06:02 -0300 |
| commit | 29b7c71b5ecf2caaa4c2105ecc0094826db8a8a8 (patch) | |
| tree | 1dac9e51e30b008aaf53422f5d2e5aa67259a6bd /arch/s390 | |
| parent | 14eebd917d154f3181d2cb219e40b18eec314db7 (diff) | |
| download | linux-29b7c71b5ecf2caaa4c2105ecc0094826db8a8a8.tar.bz2 | |
KVM: s390: epoch difference and TOD programmable field
This patch makes vcpu epoch difference and the TOD programmable
field accessible from userspace. This is needed in order to
implement a couple of instructions that deal with the time of
day clock on s390, such as SET CLOCK and for migration.
Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/s390')
| -rw-r--r-- | arch/s390/include/asm/kvm.h | 3 | ||||
| -rw-r--r-- | arch/s390/kvm/kvm-s390.c | 16 |
2 files changed, 19 insertions, 0 deletions
diff --git a/arch/s390/include/asm/kvm.h b/arch/s390/include/asm/kvm.h index 96076676e224..53a53720830a 100644 --- a/arch/s390/include/asm/kvm.h +++ b/arch/s390/include/asm/kvm.h @@ -52,4 +52,7 @@ struct kvm_sync_regs { __u32 acrs[16]; /* access registers */ __u64 crs[16]; /* control registers */ }; + +#define KVM_REG_S390_TODPR (KVM_REG_S390 | KVM_REG_SIZE_U32 | 0x1) +#define KVM_REG_S390_EPOCHDIFF (KVM_REG_S390 | KVM_REG_SIZE_U64 | 0x2) #endif diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c index 894b3e47b8c1..cc4c01322ce4 100644 --- a/arch/s390/kvm/kvm-s390.c +++ b/arch/s390/kvm/kvm-s390.c @@ -446,6 +446,14 @@ static int kvm_arch_vcpu_ioctl_get_one_reg(struct kvm_vcpu *vcpu, int r = -EINVAL; switch (reg->id) { + case KVM_REG_S390_TODPR: + r = put_user(vcpu->arch.sie_block->todpr, + (u32 __user *)reg->addr); + break; + case KVM_REG_S390_EPOCHDIFF: + r = put_user(vcpu->arch.sie_block->epoch, + (u64 __user *)reg->addr); + break; default: break; } @@ -459,6 +467,14 @@ static int kvm_arch_vcpu_ioctl_set_one_reg(struct kvm_vcpu *vcpu, int r = -EINVAL; switch (reg->id) { + case KVM_REG_S390_TODPR: + r = get_user(vcpu->arch.sie_block->todpr, + (u32 __user *)reg->addr); + break; + case KVM_REG_S390_EPOCHDIFF: + r = get_user(vcpu->arch.sie_block->epoch, + (u64 __user *)reg->addr); + break; default: break; } |