On 01/08/2018 08:37 PM, David Hildenbrand wrote:
> "wq" is not used at all. "cpuflags" can be access directly via the vcpu,
> just as "float_int" via vcpu->kvm.
>
> Signed-off-by: David Hildenbrand <david@xxxxxxxxxx>
reviewed and applied with the patch description update.
Thanks.
> ---
>
> v1 -> v2:
> - Properly make use of dst_vcpu instead of vcpu in sigp.c
>
> arch/s390/include/asm/kvm_host.h | 3 ---
> arch/s390/kvm/interrupt.c | 25 +++++++++++--------------
> arch/s390/kvm/kvm-s390.c | 3 ---
> arch/s390/kvm/kvm-s390.h | 2 +-
> arch/s390/kvm/sigp.c | 12 ++++--------
> 5 files changed, 16 insertions(+), 29 deletions(-)
>
> diff --git a/arch/s390/include/asm/kvm_host.h b/arch/s390/include/asm/kvm_host.h
> index e14f381757f6..e16a9f2a44ad 100644
> --- a/arch/s390/include/asm/kvm_host.h
> +++ b/arch/s390/include/asm/kvm_host.h
> @@ -515,9 +515,6 @@ struct kvm_s390_irq_payload {
>
> struct kvm_s390_local_interrupt {
> spinlock_t lock;
> - struct kvm_s390_float_interrupt *float_int;
> - struct swait_queue_head *wq;
> - atomic_t *cpuflags;
> DECLARE_BITMAP(sigp_emerg_pending, KVM_MAX_VCPUS);
> struct kvm_s390_irq_payload irq;
> unsigned long pending_irqs;
> diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
> index 818aa4248b0f..f8eb2cfa763a 100644
> --- a/arch/s390/kvm/interrupt.c
> +++ b/arch/s390/kvm/interrupt.c
> @@ -107,12 +107,11 @@ static int sca_inject_ext_call(struct kvm_vcpu *vcpu, int src_id)
>
> static void sca_clear_ext_call(struct kvm_vcpu *vcpu)
> {
> - struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
> int rc, expect;
>
> if (!kvm_s390_use_sca_entries())
> return;
> - atomic_andnot(CPUSTAT_ECALL_PEND, li->cpuflags);
> + atomic_andnot(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
> read_lock(&vcpu->kvm->arch.sca_lock);
> if (vcpu->kvm->arch.use_esca) {
> struct esca_block *sca = vcpu->kvm->arch.sca;
> @@ -279,13 +278,13 @@ static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
> static void __set_cpu_idle(struct kvm_vcpu *vcpu)
> {
> atomic_or(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
> - set_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
> + set_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
> }
>
> static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
> {
> atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
> - clear_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
> + clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
> }
>
> static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
> @@ -1228,7 +1227,7 @@ static int __inject_pfault_init(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
>
> li->irq.ext = irq->u.ext;
> set_bit(IRQ_PEND_PFAULT_INIT, &li->pending_irqs);
> - atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
> + __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
> return 0;
> }
>
> @@ -1253,7 +1252,7 @@ static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
> if (test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))
> return -EBUSY;
> *extcall = irq->u.extcall;
> - atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
> + __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
> return 0;
> }
>
> @@ -1329,7 +1328,7 @@ static int __inject_sigp_emergency(struct kvm_vcpu *vcpu,
>
> set_bit(irq->u.emerg.code, li->sigp_emerg_pending);
> set_bit(IRQ_PEND_EXT_EMERGENCY, &li->pending_irqs);
> - atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
> + __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
> return 0;
> }
>
> @@ -1373,7 +1372,7 @@ static int __inject_ckc(struct kvm_vcpu *vcpu)
> 0, 0);
>
> set_bit(IRQ_PEND_EXT_CLOCK_COMP, &li->pending_irqs);
> - atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
> + __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
> return 0;
> }
>
> @@ -1386,7 +1385,7 @@ static int __inject_cpu_timer(struct kvm_vcpu *vcpu)
> 0, 0);
>
> set_bit(IRQ_PEND_EXT_CPU_TIMER, &li->pending_irqs);
> - atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
> + __set_cpuflag(vcpu, CPUSTAT_EXT_INT);
> return 0;
> }
>
> @@ -1546,7 +1545,6 @@ static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
> static void __floating_irq_kick(struct kvm *kvm, u64 type)
> {
> struct kvm_s390_float_interrupt *fi = &kvm->arch.float_int;
> - struct kvm_s390_local_interrupt *li;
> struct kvm_vcpu *dst_vcpu;
> int sigcpu, online_vcpus, nr_tries = 0;
>
> @@ -1568,16 +1566,15 @@ static void __floating_irq_kick(struct kvm *kvm, u64 type)
> dst_vcpu = kvm_get_vcpu(kvm, sigcpu);
>
> /* make the VCPU drop out of the SIE, or wake it up if sleeping */
> - li = &dst_vcpu->arch.local_int;
> switch (type) {
> case KVM_S390_MCHK:
> - atomic_or(CPUSTAT_STOP_INT, li->cpuflags);
> + __set_cpuflag(dst_vcpu, CPUSTAT_STOP_INT);
> break;
> case KVM_S390_INT_IO_MIN...KVM_S390_INT_IO_MAX:
> - atomic_or(CPUSTAT_IO_INT, li->cpuflags);
> + __set_cpuflag(dst_vcpu, CPUSTAT_IO_INT);
> break;
> default:
> - atomic_or(CPUSTAT_EXT_INT, li->cpuflags);
> + __set_cpuflag(dst_vcpu, CPUSTAT_EXT_INT);
> break;
> }
> kvm_s390_vcpu_wakeup(dst_vcpu);
> diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
> index 2c93cbbcd15e..2f79ee31666c 100644
> --- a/arch/s390/kvm/kvm-s390.c
> +++ b/arch/s390/kvm/kvm-s390.c
> @@ -2498,9 +2498,6 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm,
>
> vcpu->arch.sie_block->icpua = id;
> spin_lock_init(&vcpu->arch.local_int.lock);
> - vcpu->arch.local_int.float_int = &kvm->arch.float_int;
> - vcpu->arch.local_int.wq = &vcpu->wq;
> - vcpu->arch.local_int.cpuflags = &vcpu->arch.sie_block->cpuflags;
> seqcount_init(&vcpu->arch.cputm_seqcount);
>
> rc = kvm_vcpu_init(vcpu, kvm, id);
> diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
> index 5e46ba429bcb..8877116f0159 100644
> --- a/arch/s390/kvm/kvm-s390.h
> +++ b/arch/s390/kvm/kvm-s390.h
> @@ -54,7 +54,7 @@ static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
>
> static inline int is_vcpu_idle(struct kvm_vcpu *vcpu)
> {
> - return test_bit(vcpu->vcpu_id, vcpu->arch.local_int.float_int->idle_mask);
> + return test_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
> }
>
> static inline int kvm_is_ucontrol(struct kvm *kvm)
> diff --git a/arch/s390/kvm/sigp.c b/arch/s390/kvm/sigp.c
> index c1f5cde2c878..5cafd1e2651b 100644
> --- a/arch/s390/kvm/sigp.c
> +++ b/arch/s390/kvm/sigp.c
> @@ -20,14 +20,11 @@
> static int __sigp_sense(struct kvm_vcpu *vcpu, struct kvm_vcpu *dst_vcpu,
> u64 *reg)
> {
> - struct kvm_s390_local_interrupt *li;
> int cpuflags;
> int rc;
> int ext_call_pending;
>
> - li = &dst_vcpu->arch.local_int;
> -
> - cpuflags = atomic_read(li->cpuflags);
> + cpuflags = atomic_read(&dst_vcpu->arch.sie_block->cpuflags);
> ext_call_pending = kvm_s390_ext_call_pending(dst_vcpu);
> if (!(cpuflags & CPUSTAT_STOPPED) && !ext_call_pending)
> rc = SIGP_CC_ORDER_CODE_ACCEPTED;
> @@ -211,7 +208,7 @@ static int __sigp_store_status_at_addr(struct kvm_vcpu *vcpu,
> int flags;
> int rc;
>
> - flags = atomic_read(dst_vcpu->arch.local_int.cpuflags);
> + flags = atomic_read(&dst_vcpu->arch.sie_block->cpuflags);
> if (!(flags & CPUSTAT_STOPPED)) {
> *reg &= 0xffffffff00000000UL;
> *reg |= SIGP_STATUS_INCORRECT_STATE;
> @@ -231,7 +228,6 @@ static int __sigp_store_status_at_addr(struct kvm_vcpu *vcpu,
> static int __sigp_sense_running(struct kvm_vcpu *vcpu,
> struct kvm_vcpu *dst_vcpu, u64 *reg)
> {
> - struct kvm_s390_local_interrupt *li;
> int rc;
>
> if (!test_kvm_facility(vcpu->kvm, 9)) {
> @@ -240,8 +236,8 @@ static int __sigp_sense_running(struct kvm_vcpu *vcpu,
> return SIGP_CC_STATUS_STORED;
> }
>
> - li = &dst_vcpu->arch.local_int;
> - if (atomic_read(li->cpuflags) & CPUSTAT_RUNNING) {
> + if (atomic_read(&dst_vcpu->arch.sie_block->cpuflags) &
> + CPUSTAT_RUNNING) {
> /* running */
> rc = SIGP_CC_ORDER_CODE_ACCEPTED;
> } else {
>
