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| author | David Hildenbrand <dahi@linux.vnet.ibm.com> | 2014-01-23 10:47:13 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-04-22 13:24:50 +0200 |
| commit | aba0750889d012f84a719112997abb7be11bba4b (patch) | |
| tree | adf0c6d527dfb844ddfd03a0a460a3c8806e5223 /arch/s390/kvm/priv.c | |
| parent | 8712836b30cef5d49bc3bb8bc3da88a40e11e574 (diff) | |
| download | linux-aba0750889d012f84a719112997abb7be11bba4b.tar.bz2 | |
KVM: s390: emulate stctl and stctg
Introduce the methods to emulate the stctl and stctg instruction. Added tracing
code.
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Diffstat (limited to 'arch/s390/kvm/priv.c')
| -rw-r--r-- | arch/s390/kvm/priv.c | 73 |
1 files changed, 73 insertions, 0 deletions
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 5fb503a6c443..27f9051a78f8 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -789,6 +789,42 @@ int kvm_s390_handle_lctl(struct kvm_vcpu *vcpu) return 0; } +int kvm_s390_handle_stctl(struct kvm_vcpu *vcpu) +{ + int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; + int reg3 = vcpu->arch.sie_block->ipa & 0x000f; + u64 ga; + u32 val; + int reg, rc; + + vcpu->stat.instruction_stctl++; + + if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) + return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); + + ga = kvm_s390_get_base_disp_rs(vcpu); + + if (ga & 3) + return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); + + VCPU_EVENT(vcpu, 5, "stctl r1:%x, r3:%x, addr:%llx", reg1, reg3, ga); + trace_kvm_s390_handle_stctl(vcpu, 0, reg1, reg3, ga); + + reg = reg1; + do { + val = vcpu->arch.sie_block->gcr[reg] & 0x00000000fffffffful; + rc = write_guest(vcpu, ga, &val, sizeof(val)); + if (rc) + return kvm_s390_inject_prog_cond(vcpu, rc); + ga += 4; + if (reg == reg3) + break; + reg = (reg + 1) % 16; + } while (1); + + return 0; +} + static int handle_lctlg(struct kvm_vcpu *vcpu) { int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; @@ -825,8 +861,45 @@ static int handle_lctlg(struct kvm_vcpu *vcpu) return 0; } +static int handle_stctg(struct kvm_vcpu *vcpu) +{ + int reg1 = (vcpu->arch.sie_block->ipa & 0x00f0) >> 4; + int reg3 = vcpu->arch.sie_block->ipa & 0x000f; + u64 ga, val; + int reg, rc; + + vcpu->stat.instruction_stctg++; + + if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) + return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); + + ga = kvm_s390_get_base_disp_rsy(vcpu); + + if (ga & 7) + return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); + + reg = reg1; + + VCPU_EVENT(vcpu, 5, "stctg r1:%x, r3:%x, addr:%llx", reg1, reg3, ga); + trace_kvm_s390_handle_stctl(vcpu, 1, reg1, reg3, ga); + + do { + val = vcpu->arch.sie_block->gcr[reg]; + rc = write_guest(vcpu, ga, &val, sizeof(val)); + if (rc) + return kvm_s390_inject_prog_cond(vcpu, rc); + ga += 8; + if (reg == reg3) + break; + reg = (reg + 1) % 16; + } while (1); + + return 0; +} + static const intercept_handler_t eb_handlers[256] = { [0x2f] = handle_lctlg, + [0x25] = handle_stctg, }; int kvm_s390_handle_eb(struct kvm_vcpu *vcpu) |