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KVM: s390: convert handle_prog() 

Convert handle_prog() to new guest access functions.
Also make the code a bit more readable and look at the return code
of write_guest_lc() which was missing before.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
This commit is contained in:
Heiko Carstens 2014-01-01 16:37:47 +01:00 committed by Christian Borntraeger
parent 81480cc19c
commit 0040e7d20f
1 changed files with 13 additions and 9 deletions
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22
arch/s390/kvm/intercept.c
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@ -111,18 +111,22 @@ static int handle_instruction(struct kvm_vcpu *vcpu)
static int handle_prog(struct kvm_vcpu *vcpu)
{
struct kvm_s390_itdb *itdb;
int rc;
vcpu->stat.exit_program_interruption++;
/* Restore ITDB to Program-Interruption TDB in guest memory */
if (IS_TE_ENABLED(vcpu) &&
!(current->thread.per_flags & PER_FLAG_NO_TE) &&
IS_ITDB_VALID(vcpu)) {
copy_to_guest(vcpu, TDB_ADDR, vcpu->arch.sie_block->itdba,
sizeof(struct kvm_s390_itdb));
memset((void *) vcpu->arch.sie_block->itdba, 0,
sizeof(struct kvm_s390_itdb));
}
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, TDB_ADDR, itdb, sizeof(*itdb));
if (rc)
return rc;
memset(itdb, 0, sizeof(*itdb));
skip_itdb:
trace_kvm_s390_intercept_prog(vcpu, vcpu->arch.sie_block->iprcc);
return kvm_s390_inject_program_int(vcpu, vcpu->arch.sie_block->iprcc);
}