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| author |   David Hildenbrand <dahi@linux.vnet.ibm.com> | 2015-11-04 13:47:58 +0100 |
|---|---|---|
| committer |   Christian Borntraeger <borntraeger@de.ibm.com> | 2016-02-10 13:12:49 +0100 |
| commit | 0e8bc06a2fbb4d6b688baa8e2416cd07f9453595 (patch) | |
| tree | a601f7da3506be80b6fe38304b36d4c02d48fc39 /arch/s390/kvm/priv.c | |
| parent | KVM: s390: sync of fp registers via kvm_run (diff) | |
| download | linux-dev-0e8bc06a2fbb4d6b688baa8e2416cd07f9453595.tar.xz linux-dev-0e8bc06a2fbb4d6b688baa8e2416cd07f9453595.zip | |
KVM: s390: PSW forwarding / rewinding / ilc rework
We have some confusion about ilc vs. ilen in our current code. So let's
correctly use the term ilen when dealing with (ilc << 1).
Program irq injection didn't take care of the correct ilc in case of
irqs triggered by EXECUTE functions, let's provide one function
kvm_s390_get_ilen() to take care of all that.
Also, manually specifying in intercept handlers the size of the
instruction (and sometimes overwriting that value for EXECUTE internally)
doesn't make too much sense. So also provide the functions:
- kvm_s390_retry_instr to retry the currently intercepted instruction
- kvm_s390_rewind_psw to rewind the PSW without internal overwrites
- kvm_s390_forward_psw to forward the PSW
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
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 | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index ed74e86d9b9e..d58cbe9813db 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -173,7 +173,7 @@ static int handle_skey(struct kvm_vcpu *vcpu) if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE) return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); - kvm_s390_rewind_psw(vcpu, 4); + kvm_s390_retry_instr(vcpu); VCPU_EVENT(vcpu, 4, "%s", "retrying storage key operation"); return 0; } @@ -184,7 +184,7 @@ static int handle_ipte_interlock(struct kvm_vcpu *vcpu) if (psw_bits(vcpu->arch.sie_block->gpsw).p) return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu)); - kvm_s390_rewind_psw(vcpu, 4); + kvm_s390_retry_instr(vcpu); VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation"); return 0; } @@ -759,8 +759,8 @@ static int handle_essa(struct kvm_vcpu *vcpu) if (((vcpu->arch.sie_block->ipb & 0xf0000000) >> 28) > 6) return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION); - /* Rewind PSW to repeat the ESSA instruction */ - kvm_s390_rewind_psw(vcpu, 4); + /* Retry the ESSA instruction */ + kvm_s390_retry_instr(vcpu); vcpu->arch.sie_block->cbrlo &= PAGE_MASK; /* reset nceo */ cbrlo = phys_to_virt(vcpu->arch.sie_block->cbrlo); down_read(&gmap->mm->mmap_sem); |