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KVM: s390: Factor out handle_itdb to handle TX aborts 

Factor out the new function handle_itdb(), which copies the ITDB into
guest lowcore to fully handle a TX abort.

Signed-off-by: Michael Mueller <mimu@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Michael Mueller 2014-03-13 12:16:45 +01:00 committed by Christian Borntraeger
parent a86dcc2482
commit e325fe69aa
1 changed files with 26 additions and 12 deletions
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38
arch/s390/kvm/intercept.c
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@ -171,12 +171,33 @@ static void __extract_prog_irq(struct kvm_vcpu *vcpu,
}
}
/*
* restore ITDB to program-interruption TDB in guest lowcore
* and set TX abort indication if required
*/
static int handle_itdb(struct kvm_vcpu *vcpu)
{
struct kvm_s390_itdb *itdb;
int rc;
if (!IS_TE_ENABLED(vcpu) || !IS_ITDB_VALID(vcpu))
return 0;
if (current->thread.per_flags & PER_FLAG_NO_TE)
return 0;
itdb = (struct kvm_s390_itdb *)vcpu->arch.sie_block->itdba;
rc = write_guest_lc(vcpu, __LC_PGM_TDB, itdb, sizeof(*itdb));
if (rc)
return rc;
memset(itdb, 0, sizeof(*itdb));
return 0;
}
#define per_event(vcpu) (vcpu->arch.sie_block->iprcc & PGM_PER)
static int handle_prog(struct kvm_vcpu *vcpu)
{
struct kvm_s390_pgm_info pgm_info;
struct kvm_s390_itdb *itdb;
int rc;
vcpu->stat.exit_program_interruption++;
@ -188,20 +209,13 @@ static int handle_prog(struct kvm_vcpu *vcpu)
return 0;
}
/* Restore ITDB to Program-Interruption TDB in guest memory */
if (!IS_TE_ENABLED(vcpu) || !IS_ITDB_VALID(vcpu))
goto skip_itdb;
if (current->thread.per_flags & PER_FLAG_NO_TE)
goto skip_itdb;
itdb = (struct kvm_s390_itdb *)vcpu->arch.sie_block->itdba;
rc = write_guest_lc(vcpu, __LC_PGM_TDB, itdb, sizeof(*itdb));
trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc);
rc = handle_itdb(vcpu);
if (rc)
return rc;
memset(itdb, 0, sizeof(*itdb));
skip_itdb:
trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc);
__extract_prog_irq(vcpu, &pgm_info);
__extract_prog_irq(vcpu, &pgm_info);
return kvm_s390_inject_prog_irq(vcpu, &pgm_info);
}