diff options
| author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2014-01-10 14:33:28 +0100 |
|---|---|---|
| committer | Christian Borntraeger <borntraeger@de.ibm.com> | 2014-04-22 13:24:39 +0200 |
| commit | 8a242234b4bfed37f7fbd9b0b16f8088f31ca140 (patch) | |
| tree | b7dbea23f97a08e2e45512f20d546521dfcd6fb9 /arch/s390/kvm/priv.c | |
| parent | 217a440683b51463f53e397cfdda27d7e92bf275 (diff) | |
| download | lwn-8a242234b4bfed37f7fbd9b0b16f8088f31ca140.tar.gz lwn-8a242234b4bfed37f7fbd9b0b16f8088f31ca140.zip | |
KVM: s390: make use of ipte lock
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Thomas Huth <thuth@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 | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c index 9a04d74c5fb4..4792f1df921a 100644 --- a/arch/s390/kvm/priv.c +++ b/arch/s390/kvm/priv.c @@ -173,6 +173,19 @@ static int handle_skey(struct kvm_vcpu *vcpu) return 0; } +static int handle_ipte_interlock(struct kvm_vcpu *vcpu) +{ + psw_t *psw = &vcpu->arch.sie_block->gpsw; + + vcpu->stat.instruction_ipte_interlock++; + if (psw_bits(*psw).p) + return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP); + wait_event(vcpu->kvm->arch.ipte_wq, !ipte_lock_held(vcpu)); + psw->addr = __rewind_psw(*psw, 4); + VCPU_EVENT(vcpu, 4, "%s", "retrying ipte interlock operation"); + return 0; +} + static int handle_test_block(struct kvm_vcpu *vcpu) { unsigned long hva; @@ -509,6 +522,7 @@ static const intercept_handler_t b2_handlers[256] = { [0x10] = handle_set_prefix, [0x11] = handle_store_prefix, [0x12] = handle_store_cpu_address, + [0x21] = handle_ipte_interlock, [0x29] = handle_skey, [0x2a] = handle_skey, [0x2b] = handle_skey, @@ -526,6 +540,7 @@ static const intercept_handler_t b2_handlers[256] = { [0x3a] = handle_io_inst, [0x3b] = handle_io_inst, [0x3c] = handle_io_inst, + [0x50] = handle_ipte_interlock, [0x5f] = handle_io_inst, [0x74] = handle_io_inst, [0x76] = handle_io_inst, @@ -686,7 +701,10 @@ static int handle_essa(struct kvm_vcpu *vcpu) } static const intercept_handler_t b9_handlers[256] = { + [0x8a] = handle_ipte_interlock, [0x8d] = handle_epsw, + [0x8e] = handle_ipte_interlock, + [0x8f] = handle_ipte_interlock, [0xab] = handle_essa, [0xaf] = handle_pfmf, }; |