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| author | Michael Mueller <mimu@linux.vnet.ibm.com> | 2014-03-13 12:16:45 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-04-22 13:24:54 +0200 |
| commit | e325fe69aa37b485635521568651642791d6d140 (patch) | |
| tree | ae3679e872a7786a8c4dff91c089d05df7262859 /arch/s390/kvm | |
| parent | a86dcc2482cf29ffcf6fbc174ce55e4f5f18cd8b (diff) | |
| download | linux-stable-e325fe69aa37b485635521568651642791d6d140.tar.gz linux-stable-e325fe69aa37b485635521568651642791d6d140.tar.bz2 linux-stable-e325fe69aa37b485635521568651642791d6d140.zip | |
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>
Diffstat (limited to 'arch/s390/kvm')
| -rw-r--r-- | arch/s390/kvm/intercept.c | 38 |
1 files changed, 26 insertions, 12 deletions
diff --git a/arch/s390/kvm/intercept.c b/arch/s390/kvm/intercept.c index f39160406efa..30e1c5eb726a 100644 --- a/arch/s390/kvm/intercept.c +++ b/arch/s390/kvm/intercept.c @@ -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); } |