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vfio-user: handle device interrupts

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Forward remote device's interrupts to the guest

Signed-off-by: Elena Ufimtseva <elena.ufimtseva@oracle.com>
Signed-off-by: John G Johnson <john.g.johnson@oracle.com>
Signed-off-by: Jagannathan Raman <jag.raman@oracle.com>
Message-id: 9523479eaafe050677f4de2af5dd0df18c27cfd9.1655151679.git.jag.raman@oracle.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Jagannathan Raman 2022-06-13 16:26:33 -04:00 • committed by Stefan Hajnoczi
parent 3123f93d6b
commit 08cf3dc611
13 changed files with 298 additions and 12 deletions
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49
hw/pci/msi.c
View file

@ -134,7 +134,7 @@ void msi_set_message(PCIDevice *dev, MSIMessage msg)
pci_set_word(dev->config + msi_data_off(dev, msi64bit), msg.data);
}
MSIMessage msi_get_message(PCIDevice *dev, unsigned int vector)
static MSIMessage msi_prepare_message(PCIDevice *dev, unsigned int vector)
{
uint16_t flags = pci_get_word(dev->config + msi_flags_off(dev));
bool msi64bit = flags & PCI_MSI_FLAGS_64BIT;
@ -159,6 +159,11 @@ MSIMessage msi_get_message(PCIDevice *dev, unsigned int vector)
return msg;
}
MSIMessage msi_get_message(PCIDevice *dev, unsigned int vector)
{
return dev->msi_prepare_message(dev, vector);
}
bool msi_enabled(const PCIDevice *dev)
{
return msi_present(dev) &&
@ -241,6 +246,8 @@ int msi_init(struct PCIDevice *dev, uint8_t offset,
0xffffffff >> (PCI_MSI_VECTORS_MAX - nr_vectors));
}
dev->msi_prepare_message = msi_prepare_message;
return 0;
}
@ -256,6 +263,7 @@ void msi_uninit(struct PCIDevice *dev)
cap_size = msi_cap_sizeof(flags);
pci_del_capability(dev, PCI_CAP_ID_MSI, cap_size);
dev->cap_present &= ~QEMU_PCI_CAP_MSI;
dev->msi_prepare_message = NULL;
MSI_DEV_PRINTF(dev, "uninit\n");
}
@ -307,6 +315,39 @@ bool msi_is_masked(const PCIDevice *dev, unsigned int vector)
return mask & (1U << vector);
}
void msi_set_mask(PCIDevice *dev, int vector, bool mask, Error **errp)
{
ERRP_GUARD();
uint16_t flags = pci_get_word(dev->config + msi_flags_off(dev));
bool msi64bit = flags & PCI_MSI_FLAGS_64BIT;
uint32_t irq_state, vector_mask, pending;
if (vector > PCI_MSI_VECTORS_MAX) {
error_setg(errp, "msi: vector %d not allocated. max vector is %d",
vector, PCI_MSI_VECTORS_MAX);
return;
}
vector_mask = (1U << vector);
irq_state = pci_get_long(dev->config + msi_mask_off(dev, msi64bit));
if (mask) {
irq_state |= vector_mask;
} else {
irq_state &= ~vector_mask;
}
pci_set_long(dev->config + msi_mask_off(dev, msi64bit), irq_state);
pending = pci_get_long(dev->config + msi_pending_off(dev, msi64bit));
if (!mask && (pending & vector_mask)) {
pending &= ~vector_mask;
pci_set_long(dev->config + msi_pending_off(dev, msi64bit), pending);
msi_notify(dev, vector);
}
}
void msi_notify(PCIDevice *dev, unsigned int vector)
{
uint16_t flags = pci_get_word(dev->config + msi_flags_off(dev));
@ -334,11 +375,7 @@ void msi_notify(PCIDevice *dev, unsigned int vector)
void msi_send_message(PCIDevice *dev, MSIMessage msg)
{
MemTxAttrs attrs = {};
attrs.requester_id = pci_requester_id(dev);
address_space_stl_le(&dev->bus_master_as, msg.address, msg.data,
attrs, NULL);
dev->msi_trigger(dev, msg);
}
/* Normally called by pci_default_write_config(). */