[PATCH v1 3/4] KVM: s390: introduce and use kvm_s390_clear_cpuflags()

David Hildenbrand
2018-01-23T17:05:42Z

Use it just like kvm_s390_set_cpuflags().

Suggested-by: Cornelia Huck <cohuck@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
---
arch/s390/kvm/interrupt.c | 8 ++++----
arch/s390/kvm/kvm-s390.c | 11 +++++------
arch/s390/kvm/kvm-s390.h | 5 +++++
arch/s390/kvm/priv.c | 2 +-
arch/s390/kvm/vsie.c | 2 +-
5 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 404a127b1921..8687aed9a268 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -111,7 +111,7 @@ static void sca_clear_ext_call(struct kvm_vcpu *vcpu)

if (!kvm_s390_use_sca_entries())
return;
- atomic_andnot(CPUSTAT_ECALL_PEND, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_clear_cpuflags(vcpu, CPUSTAT_ECALL_PEND);
read_lock(&vcpu->kvm->arch.sca_lock);
if (vcpu->kvm->arch.use_esca) {
struct esca_block *sca = vcpu->kvm->arch.sca;
@@ -283,14 +283,14 @@ static void __set_cpu_idle(struct kvm_vcpu *vcpu)

static void __unset_cpu_idle(struct kvm_vcpu *vcpu)
{
- atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT);
clear_bit(vcpu->vcpu_id, vcpu->kvm->arch.float_int.idle_mask);
}

static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)
{
- atomic_andnot(CPUSTAT_IO_INT | CPUSTAT_EXT_INT | CPUSTAT_STOP_INT,
- &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IO_INT | CPUSTAT_EXT_INT |
+ CPUSTAT_STOP_INT);
vcpu->arch.sie_block->lctl = 0x0000;
vcpu->arch.sie_block->ictl &= ~(ICTL_LPSW | ICTL_STCTL | ICTL_PINT);

diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 5680b12add68..d27a247799f0 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -2327,7 +2327,7 @@ void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu)
vcpu->cpu = -1;
if (vcpu->arch.cputm_enabled && !is_vcpu_idle(vcpu))
__stop_cpu_timer_accounting(vcpu);
- atomic_andnot(CPUSTAT_RUNNING, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_clear_cpuflags(vcpu, CPUSTAT_RUNNING);
vcpu->arch.enabled_gmap = gmap_get_enabled();
gmap_disable(vcpu->arch.enabled_gmap);

@@ -2845,14 +2845,14 @@ int kvm_arch_vcpu_ioctl_set_guest_debug(struct kvm_vcpu *vcpu,
if (dbg->control & KVM_GUESTDBG_USE_HW_BP)
rc = kvm_s390_import_bp_data(vcpu, dbg);
} else {
- atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
vcpu->arch.guestdbg.last_bp = 0;
}

if (rc) {
vcpu->guest_debug = 0;
kvm_s390_clear_bp_data(vcpu);
- atomic_andnot(CPUSTAT_P, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_clear_cpuflags(vcpu, CPUSTAT_P);
}

out:
@@ -2949,8 +2949,7 @@ static int kvm_s390_handle_requests(struct kvm_vcpu *vcpu)
if (kvm_check_request(KVM_REQ_DISABLE_IBS, vcpu)) {
if (ibs_enabled(vcpu)) {
trace_kvm_s390_enable_disable_ibs(vcpu->vcpu_id, 0);
- atomic_andnot(CPUSTAT_IBS,
- &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_clear_cpuflags(vcpu, CPUSTAT_IBS);
}
goto retry;
}
@@ -3600,7 +3599,7 @@ void kvm_s390_vcpu_start(struct kvm_vcpu *vcpu)
__disable_ibs_on_all_vcpus(vcpu->kvm);
}

- atomic_andnot(CPUSTAT_STOPPED, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_clear_cpuflags(vcpu, CPUSTAT_STOPPED);
/*
* Another VCPU might have used IBS while we were offline.
* Let's play safe and flush the VCPU at startup.
diff --git a/arch/s390/kvm/kvm-s390.h b/arch/s390/kvm/kvm-s390.h
index a9f2c8d1833d..f727313a706f 100644
--- a/arch/s390/kvm/kvm-s390.h
+++ b/arch/s390/kvm/kvm-s390.h
@@ -52,6 +52,11 @@ static inline void kvm_s390_set_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
atomic_or(flags, &vcpu->arch.sie_block->cpuflags);
}

+static inline void kvm_s390_clear_cpuflags(struct kvm_vcpu *vcpu, u32 flags)
+{
+ atomic_andnot(flags, &vcpu->arch.sie_block->cpuflags);
+}
+
static inline int is_vcpu_stopped(struct kvm_vcpu *vcpu)
{
return atomic_read(&vcpu->arch.sie_block->cpuflags) & CPUSTAT_STOPPED;
diff --git a/arch/s390/kvm/priv.c b/arch/s390/kvm/priv.c
index 572496c688cc..de4b13eca3ab 100644
--- a/arch/s390/kvm/priv.c
+++ b/arch/s390/kvm/priv.c
@@ -210,7 +210,7 @@ int kvm_s390_skey_check_enable(struct kvm_vcpu *vcpu)
VCPU_EVENT(vcpu, 3, "enabling storage keys for guest: %d", rc);
if (!rc) {
if (atomic_read(&sie_block->cpuflags) & CPUSTAT_KSS)
- atomic_andnot(CPUSTAT_KSS, &sie_block->cpuflags);
+ kvm_s390_clear_cpuflags(vcpu, CPUSTAT_KSS);
else
sie_block->ictl &= ~(ICTL_ISKE | ICTL_SSKE |
ICTL_RRBE);
diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index 902b5befb691..35c94b6632db 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -916,7 +916,7 @@ static void register_shadow_scb(struct kvm_vcpu *vcpu,
*/
static void unregister_shadow_scb(struct kvm_vcpu *vcpu)
{
- atomic_andnot(CPUSTAT_WAIT, &vcpu->arch.sie_block->cpuflags);
+ kvm_s390_clear_cpuflags(vcpu, CPUSTAT_WAIT);
WRITE_ONCE(vcpu->arch.vsie_block, NULL);
}

--
2.14.3