[PATCH v5 05/15] KVM: s390: unify pending_irqs() and pending_irqs_no_gisa()

Michael Mueller
2018-12-19T19:17:46Z

Use a single function with parameter irq_flags to differentiate
between cases.

New irq flag:
IRQ_FLAG_LOCAL: include vcpu local interruptions pending
IRQ_FLAG_FLOATING: include vcpu floating interruptions pending
IRQ_FLAG_GISA: include GISA interruptions pending in IPM

New irq masks:
IRQ_MASK_ALL: include all types
IRQ_MASK_NO_GISA: include all types but GISA

Examples:
pending_irqs(vcpu, IRQ_MASK_ALL)
pending_irqs(vcpu, IRQ_MASK_NO_GISA)

There will be more irq flags with upcoming patches.

Signed-off-by: Michael Mueller <mimu@linux.ibm.com>
---
arch/s390/kvm/interrupt.c | 33 +++++++++++++++++++++------------
1 file changed, 21 insertions(+), 12 deletions(-)

diff --git a/arch/s390/kvm/interrupt.c b/arch/s390/kvm/interrupt.c
index 093b568b6356..4ab20d2eb180 100644
--- a/arch/s390/kvm/interrupt.c
+++ b/arch/s390/kvm/interrupt.c
@@ -31,6 +31,13 @@
#define PFAULT_DONE 0x0680
#define VIRTIO_PARAM 0x0d00

+#define IRQ_FLAG_LOCAL 0x8000 /* include local interruption pending mask */
+#define IRQ_FLAG_FLOATING 0x4000 /* include float interruption pending mask */
+#define IRQ_FLAG_GISA 0x2000 /* include GISA interruption pending mask */
+
+#define IRQ_MASK_ALL (IRQ_FLAG_LOCAL | IRQ_FLAG_FLOATING | IRQ_FLAG_GISA)
+#define IRQ_MASK_NO_GISA (IRQ_MASK_ALL & ~IRQ_FLAG_GISA)
+
/* handle external calls via sigp interpretation facility */
static int sca_ext_call_pending(struct kvm_vcpu *vcpu, int *src_id)
{
@@ -237,16 +244,18 @@ static inline int kvm_s390_gisa_tac_ipm_gisc(struct kvm_s390_gisa *gisa, u32 gis
return test_and_clear_bit_inv(IPM_BIT_OFFSET + gisc, (unsigned long *) gisa);
}

-static inline unsigned long pending_irqs_no_gisa(struct kvm_vcpu *vcpu)
+static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu, u16 irq_flags)
{
- return vcpu->kvm->arch.float_int.pending_irqs |
- vcpu->arch.local_int.pending_irqs;
-}
+ unsigned long pending_irqs = 0;

-static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
-{
- return pending_irqs_no_gisa(vcpu) |
- kvm_s390_gisa_get_ipm(vcpu->kvm->arch.gisa) << IRQ_PEND_IO_ISC_7;
+ if (irq_flags & IRQ_FLAG_LOCAL)
+ pending_irqs |= vcpu->arch.local_int.pending_irqs;
+ if (irq_flags & IRQ_FLAG_FLOATING)
+ pending_irqs |= vcpu->kvm->arch.float_int.pending_irqs;
+ if (irq_flags & IRQ_FLAG_GISA)
+ pending_irqs |= kvm_s390_gisa_get_ipm(vcpu->kvm->arch.gisa) <<
+ IRQ_PEND_IO_ISC_7;
+ return pending_irqs;
}

static inline int isc_to_irq_type(unsigned long isc)
@@ -275,7 +284,7 @@ static unsigned long deliverable_irqs(struct kvm_vcpu *vcpu)
{
unsigned long active_mask;

- active_mask = pending_irqs(vcpu);
+ active_mask = pending_irqs(vcpu, IRQ_MASK_ALL);
if (!active_mask)
return 0;

@@ -343,7 +352,7 @@ static void __reset_intercept_indicators(struct kvm_vcpu *vcpu)

static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)
{
- if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_IO_MASK))
+ if (!(pending_irqs(vcpu, IRQ_MASK_NO_GISA) & IRQ_PEND_IO_MASK))
return;
else if (psw_ioint_disabled(vcpu))
kvm_s390_set_cpuflags(vcpu, CPUSTAT_IO_INT);
@@ -353,7 +362,7 @@ static void set_intercept_indicators_io(struct kvm_vcpu *vcpu)

static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)
{
- if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_EXT_MASK))
+ if (!(pending_irqs(vcpu, IRQ_MASK_NO_GISA) & IRQ_PEND_EXT_MASK))
return;
if (psw_extint_disabled(vcpu))
kvm_s390_set_cpuflags(vcpu, CPUSTAT_EXT_INT);
@@ -363,7 +372,7 @@ static void set_intercept_indicators_ext(struct kvm_vcpu *vcpu)

static void set_intercept_indicators_mchk(struct kvm_vcpu *vcpu)
{
- if (!(pending_irqs_no_gisa(vcpu) & IRQ_PEND_MCHK_MASK))
+ if (!(pending_irqs(vcpu, IRQ_MASK_NO_GISA) & IRQ_PEND_MCHK_MASK))
return;
if (psw_mchk_disabled(vcpu))
vcpu->arch.sie_block->ictl |= ICTL_LPSW;
--
2.13.4