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KVM: PPC: Book3S HV: XIVE: Add a control to sync the sources

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This control will be used by the H_INT_SYNC hcall from QEMU to flush
event notifications on the XIVE IC owning the source.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
This commit is contained in:
Cédric Le Goater
2019-04-18 12:39:33 +02:00
committed by Paul Mackerras
parent 5ca8064748
commit 7b46b6169a
3 changed files with 45 additions and 0 deletions
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36
arch/powerpc/kvm/book3s_xive_native.c
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@@ -335,6 +335,38 @@ static int kvmppc_xive_native_set_source_config(struct kvmppc_xive *xive,
priority, masked, eisn);
}
static int kvmppc_xive_native_sync_source(struct kvmppc_xive *xive,
long irq, u64 addr)
{
struct kvmppc_xive_src_block *sb;
struct kvmppc_xive_irq_state *state;
struct xive_irq_data *xd;
u32 hw_num;
u16 src;
int rc = 0;
pr_devel("%s irq=0x%lx", __func__, irq);
sb = kvmppc_xive_find_source(xive, irq, &src);
if (!sb)
return -ENOENT;
state = &sb->irq_state[src];
rc = -EINVAL;
arch_spin_lock(&sb->lock);
if (state->valid) {
kvmppc_xive_select_irq(state, &hw_num, &xd);
xive_native_sync_source(hw_num);
rc = 0;
}
arch_spin_unlock(&sb->lock);
return rc;
}
static int xive_native_validate_queue_size(u32 qshift)
{
/*
@@ -670,6 +702,9 @@ static int kvmppc_xive_native_set_attr(struct kvm_device *dev,
case KVM_DEV_XIVE_GRP_EQ_CONFIG:
return kvmppc_xive_native_set_queue_config(xive, attr->attr,
attr->addr);
case KVM_DEV_XIVE_GRP_SOURCE_SYNC:
return kvmppc_xive_native_sync_source(xive, attr->attr,
attr->addr);
}
return -ENXIO;
}
@@ -699,6 +734,7 @@ static int kvmppc_xive_native_has_attr(struct kvm_device *dev,
break;
case KVM_DEV_XIVE_GRP_SOURCE:
case KVM_DEV_XIVE_GRP_SOURCE_CONFIG:
case KVM_DEV_XIVE_GRP_SOURCE_SYNC:
if (attr->attr >= KVMPPC_XIVE_FIRST_IRQ &&
attr->attr < KVMPPC_XIVE_NR_IRQS)
return 0;