diff options
author | Peter Xu <peterx@redhat.com> | 2016-07-14 13:56:24 +0800 |
---|---|---|
committer | Michael S. Tsirkin <mst@redhat.com> | 2016-07-21 20:43:49 +0300 |
commit | c15fa0bea982766c5c3de28d1abd245e3c44a17f (patch) | |
tree | 2da16a4148656c281266c12b34ea199e749e8a43 | |
parent | cb135f59b8059c3a372652377ef92fa4a49ad550 (diff) |
ioapic: introduce ioapic_entry_parse() helper
Abstract IOAPIC entry parsing logic into a helper function.
Signed-off-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
-rw-r--r-- | hw/intc/ioapic.c | 110 |
1 files changed, 54 insertions, 56 deletions
diff --git a/hw/intc/ioapic.c b/hw/intc/ioapic.c index 36dd42af20..cfc7b7b958 100644 --- a/hw/intc/ioapic.c +++ b/hw/intc/ioapic.c @@ -50,18 +50,56 @@ static IOAPICCommonState *ioapics[MAX_IOAPICS]; /* global variable from ioapic_common.c */ extern int ioapic_no; +struct ioapic_entry_info { + /* fields parsed from IOAPIC entries */ + uint8_t masked; + uint8_t trig_mode; + uint16_t dest_idx; + uint8_t dest_mode; + uint8_t delivery_mode; + uint8_t vector; + + /* MSI message generated from above parsed fields */ + uint32_t addr; + uint32_t data; +}; + +static void ioapic_entry_parse(uint64_t entry, struct ioapic_entry_info *info) +{ + memset(info, 0, sizeof(*info)); + info->masked = (entry >> IOAPIC_LVT_MASKED_SHIFT) & 1; + info->trig_mode = (entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1; + /* + * By default, this would be dest_id[8] + reserved[8]. When IR + * is enabled, this would be interrupt_index[15] + + * interrupt_format[1]. This field never means anything, but + * only used to generate corresponding MSI. + */ + info->dest_idx = (entry >> IOAPIC_LVT_DEST_IDX_SHIFT) & 0xffff; + info->dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1; + info->delivery_mode = (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) \ + & IOAPIC_DM_MASK; + if (info->delivery_mode == IOAPIC_DM_EXTINT) { + info->vector = pic_read_irq(isa_pic); + } else { + info->vector = entry & IOAPIC_VECTOR_MASK; + } + + info->addr = APIC_DEFAULT_ADDRESS | \ + (info->dest_idx << MSI_ADDR_DEST_IDX_SHIFT) | \ + (info->dest_mode << MSI_ADDR_DEST_MODE_SHIFT); + info->data = (info->vector << MSI_DATA_VECTOR_SHIFT) | \ + (info->trig_mode << MSI_DATA_TRIGGER_SHIFT) | \ + (info->delivery_mode << MSI_DATA_DELIVERY_MODE_SHIFT); +} + static void ioapic_service(IOAPICCommonState *s) { AddressSpace *ioapic_as = PC_MACHINE(qdev_get_machine())->ioapic_as; - uint32_t addr, data; + struct ioapic_entry_info info; uint8_t i; - uint8_t trig_mode; - uint8_t vector; - uint8_t delivery_mode; uint32_t mask; uint64_t entry; - uint16_t dest_idx; - uint8_t dest_mode; for (i = 0; i < IOAPIC_NUM_PINS; i++) { mask = 1 << i; @@ -69,33 +107,18 @@ static void ioapic_service(IOAPICCommonState *s) int coalesce = 0; entry = s->ioredtbl[i]; - if (!(entry & IOAPIC_LVT_MASKED)) { - trig_mode = ((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1); - /* - * By default, this would be dest_id[8] + - * reserved[8]. When IR is enabled, this would be - * interrupt_index[15] + interrupt_format[1]. This - * field never means anything, but only used to - * generate corresponding MSI. - */ - dest_idx = entry >> IOAPIC_LVT_DEST_IDX_SHIFT; - dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1; - delivery_mode = - (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) & IOAPIC_DM_MASK; - if (trig_mode == IOAPIC_TRIGGER_EDGE) { + ioapic_entry_parse(entry, &info); + if (!info.masked) { + if (info.trig_mode == IOAPIC_TRIGGER_EDGE) { s->irr &= ~mask; } else { coalesce = s->ioredtbl[i] & IOAPIC_LVT_REMOTE_IRR; s->ioredtbl[i] |= IOAPIC_LVT_REMOTE_IRR; } - if (delivery_mode == IOAPIC_DM_EXTINT) { - vector = pic_read_irq(isa_pic); - } else { - vector = entry & IOAPIC_VECTOR_MASK; - } + #ifdef CONFIG_KVM if (kvm_irqchip_is_split()) { - if (trig_mode == IOAPIC_TRIGGER_EDGE) { + if (info.trig_mode == IOAPIC_TRIGGER_EDGE) { kvm_set_irq(kvm_state, i, 1); kvm_set_irq(kvm_state, i, 0); } else { @@ -112,13 +135,7 @@ static void ioapic_service(IOAPICCommonState *s) * the IOAPIC message into a MSI one, and its * address space will decide whether we need a * translation. */ - addr = APIC_DEFAULT_ADDRESS | \ - (dest_idx << MSI_ADDR_DEST_IDX_SHIFT) | - (dest_mode << MSI_ADDR_DEST_MODE_SHIFT); - data = (vector << MSI_DATA_VECTOR_SHIFT) | - (trig_mode << MSI_DATA_TRIGGER_SHIFT) | - (delivery_mode << MSI_DATA_DELIVERY_MODE_SHIFT); - stl_le_phys(ioapic_as, addr, data); + stl_le_phys(ioapic_as, info.addr, info.data); } } } @@ -169,30 +186,11 @@ static void ioapic_update_kvm_routes(IOAPICCommonState *s) if (kvm_irqchip_is_split()) { for (i = 0; i < IOAPIC_NUM_PINS; i++) { - uint64_t entry = s->ioredtbl[i]; - uint8_t trig_mode; - uint8_t delivery_mode; - uint8_t dest; - uint8_t dest_mode; - uint64_t pin_polarity; MSIMessage msg; - - trig_mode = ((entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1); - dest = entry >> IOAPIC_LVT_DEST_SHIFT; - dest_mode = (entry >> IOAPIC_LVT_DEST_MODE_SHIFT) & 1; - pin_polarity = (entry >> IOAPIC_LVT_TRIGGER_MODE_SHIFT) & 1; - delivery_mode = - (entry >> IOAPIC_LVT_DELIV_MODE_SHIFT) & IOAPIC_DM_MASK; - - msg.address = APIC_DEFAULT_ADDRESS; - msg.address |= dest_mode << 2; - msg.address |= dest << 12; - - msg.data = entry & IOAPIC_VECTOR_MASK; - msg.data |= delivery_mode << APIC_DELIVERY_MODE_SHIFT; - msg.data |= pin_polarity << APIC_POLARITY_SHIFT; - msg.data |= trig_mode << APIC_TRIG_MODE_SHIFT; - + struct ioapic_entry_info info; + ioapic_entry_parse(s->ioredtbl[i], &info); + msg.address = info.addr; + msg.data = info.data; kvm_irqchip_update_msi_route(kvm_state, i, msg, NULL); } kvm_irqchip_commit_routes(kvm_state); |