@@ -54,6 +54,10 @@ KVM_FEATURE_PV_UNHALT || 7 || guest checks this feature bit
|| || before enabling paravirtualized
|| || spinlock support.
------------------------------------------------------------------------------
+KVM_FEATURE_PV_SEND_IPI || 11 || guest checks this feature bit
+ || || before using paravirtualized
+ || || send IPIs.
+------------------------------------------------------------------------------
KVM_FEATURE_CLOCKSOURCE_STABLE_BIT || 24 || host will warn if no guest-side
|| || per-cpu warps are expected in
|| || kvmclock.
@@ -113,3 +113,23 @@ compute the CLOCK_REALTIME for its clock, at the same instant.
Returns KVM_EOPNOTSUPP if the host does not use TSC clocksource,
or if clock type is different than KVM_CLOCK_PAIRING_WALLCLOCK.
+
+6. KVM_HC_SEND_IPI
+------------------------
+Architecture: x86
+Status: active
+Purpose: Send IPIs to multiple vCPUs.
+
+a0: lower part of the bitmap of destination APIC IDs
+a1: higher part of the bitmap of destination APIC IDs
+a2: the lowest APIC ID in bitmap
+a3: APIC ICR
+
+The hypercall lets a guest send multicast IPIs, with at most 128
+128 destinations per hypercall in 64-bit mode and 64 vCPUs per
+hypercall in 32-bit mode. The destinations are represented by a
+bitmap contained in the first two arguments (a0 and a1). Bit 0 of
+a0 corresponds to the APIC ID in the third argument (a2), bit 1
+corresponds to the APIC ID a2+1, and so on.
+
+Returns the number of CPUs to which the IPIs were delivered successfully.
@@ -1433,6 +1433,10 @@ void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
unsigned long address);
u64 kvm_get_arch_capabilities(void);
+int kvm_pv_send_ipi(struct kvm *kvm, unsigned long ipi_bitmap_low,
+ unsigned long ipi_bitmap_high, int min,
+ unsigned long icr, int op_64_bit);
+
void kvm_define_shared_msr(unsigned index, u32 msr);
int kvm_set_shared_msr(unsigned index, u64 val, u64 mask);
@@ -24,7 +24,8 @@
#define KVM_FEATURE_STEAL_TIME 5
#define KVM_FEATURE_PV_EOI 6
#define KVM_FEATURE_PV_UNHALT 7
-#define KVM_FEATURE_POLL_CONTROL 12
+#define KVM_FEATURE_PV_SEND_IPI 11
+#define KVM_FEATURE_POLL_CONTROL 12
/* The last 8 bits are used to indicate how to interpret the flags field
* in pvclock structure. If no bits are set, all flags are ignored.
@@ -600,7 +600,8 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
(1 << KVM_FEATURE_PV_EOI) |
(1 << KVM_FEATURE_CLOCKSOURCE_STABLE_BIT) |
(1 << KVM_FEATURE_PV_UNHALT) |
- (1 << KVM_FEATURE_POLL_CONTROL);
+ (1 << KVM_FEATURE_POLL_CONTROL) |
+ (1 << KVM_FEATURE_PV_SEND_IPI);
if (sched_info_on())
entry->eax |= (1 << KVM_FEATURE_STEAL_TIME);
@@ -542,6 +542,46 @@ int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq,
irq->level, irq->trig_mode, dest_map);
}
+int kvm_pv_send_ipi(struct kvm *kvm, unsigned long ipi_bitmap_low,
+ unsigned long ipi_bitmap_high, int min,
+ unsigned long icr, int op_64_bit)
+{
+ int i;
+ struct kvm_apic_map *map;
+ struct kvm_vcpu *vcpu;
+ struct kvm_lapic_irq irq = {0};
+ int cluster_size = op_64_bit ? 64 : 32;
+ int count = 0;
+
+ irq.vector = icr & APIC_VECTOR_MASK;
+ irq.delivery_mode = icr & APIC_MODE_MASK;
+ irq.level = (icr & APIC_INT_ASSERT) != 0;
+ irq.trig_mode = icr & APIC_INT_LEVELTRIG;
+
+ if (icr & APIC_DEST_MASK)
+ return -KVM_EINVAL;
+ if (icr & APIC_SHORT_MASK)
+ return -KVM_EINVAL;
+
+ rcu_read_lock();
+ map = rcu_dereference(kvm->arch.apic_map);
+
+ /* Bits above cluster_size are masked in the caller. */
+ for_each_set_bit(i, &ipi_bitmap_low, BITS_PER_LONG) {
+ vcpu = map->phys_map[min + i]->vcpu;
+ count += kvm_apic_set_irq(vcpu, &irq, NULL);
+ }
+
+ min += cluster_size;
+ for_each_set_bit(i, &ipi_bitmap_high, BITS_PER_LONG) {
+ vcpu = map->phys_map[min + i]->vcpu;
+ count += kvm_apic_set_irq(vcpu, &irq, NULL);
+ }
+
+ rcu_read_unlock();
+ return count;
+}
+
static int pv_eoi_put_user(struct kvm_vcpu *vcpu, u8 val)
{
@@ -6538,6 +6538,9 @@ int kvm_emulate_hypercall(struct kvm_vcpu *vcpu)
case KVM_HC_CLOCK_PAIRING:
ret = kvm_pv_clock_pairing(vcpu, a0, a1);
break;
+ case KVM_HC_SEND_IPI:
+ ret = kvm_pv_send_ipi(vcpu->kvm, a0, a1, a2, a3, op_64_bit);
+ break;
default:
ret = -KVM_ENOSYS;
break;
@@ -12,6 +12,7 @@
/* Return values for hypercalls */
#define KVM_ENOSYS 1000
#define KVM_EFAULT EFAULT
+#define KVM_EINVAL EINVAL
#define KVM_E2BIG E2BIG
#define KVM_EPERM EPERM
#define KVM_EOPNOTSUPP 95
@@ -25,6 +26,7 @@
#define KVM_HC_MIPS_EXIT_VM 7
#define KVM_HC_MIPS_CONSOLE_OUTPUT 8
#define KVM_HC_CLOCK_PAIRING 9
+#define KVM_HC_SEND_IPI 10
/*
* hypercalls use architecture specific