On Fri, Aug 31, 2018 at 05:05:03PM +0800, Peng Hao wrote:
> Signed-off-by: Peng Hao <peng.hao2@xxxxxxxxxx>
> Reviewed-by: Eduardo Habkost <ehabkost@xxxxxxxxxx>
> ---
> accel/kvm/kvm-all.c | 57 +++++++++++++++++++++++++++++++++++++++++++++++----
> include/exec/memory.h | 4 ++--
> memory.c | 4 ++--
> 3 files changed, 57 insertions(+), 8 deletions(-)
>
> diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
> index 4a3909d..11d8d78 100644
> --- a/accel/kvm/kvm-all.c
> +++ b/accel/kvm/kvm-all.c
> @@ -78,6 +78,7 @@ struct KVMState
> int fd;
> int vmfd;
> int coalesced_mmio;
> + int coalesced_pio;
> struct kvm_coalesced_mmio_ring *coalesced_mmio_ring;
> bool coalesced_flush_in_progress;
> int vcpu_events;
> @@ -559,6 +560,45 @@ static void kvm_uncoalesce_mmio_region(MemoryListener *listener,
> }
> }
>
> +static void kvm_coalesce_pio_add(MemoryListener *listener,
> + MemoryRegionSection *section,
> + hwaddr start, hwaddr size)
> +{
> + KVMState *s = kvm_state;
> +
> + if (s->coalesced_pio) {
> + struct kvm_coalesced_mmio_zone zone;
> +
> + zone.addr = start;
> + zone.size = size;
> + zone.pio = 1;
> +
> + (void)kvm_vm_ioctl(s, KVM_REGISTER_COALESCED_MMIO, &zone);
> + }
> +}
> +
> +static void kvm_coalesce_pio_del(MemoryListener *listener,
> + MemoryRegionSection *section,
> + hwaddr start, hwaddr size)
> +{
> + KVMState *s = kvm_state;
> +
> + if (s->coalesced_pio) {
> + struct kvm_coalesced_mmio_zone zone;
> +
> + zone.addr = start;
> + zone.size = size;
> + zone.pio = 1;
> +
> + (void)kvm_vm_ioctl(s, KVM_UNREGISTER_COALESCED_MMIO, &zone);
> + }
> +}
assert rather than (void)?
> +
> +static MemoryListener kvm_coalesced_pio_listener = {
> + .coalesced_io_add = kvm_coalesce_pio_add,
> + .coalesced_io_del = kvm_coalesce_pio_del,
> +};
> +
> int kvm_check_extension(KVMState *s, unsigned int extension)
> {
> int ret;
> @@ -1615,6 +1655,8 @@ static int kvm_init(MachineState *ms)
> }
>
> s->coalesced_mmio = kvm_check_extension(s, KVM_CAP_COALESCED_MMIO);
> + s->coalesced_pio = s->coalesced_mmio &&
> + kvm_check_extension(s, KVM_CAP_COALESCED_PIO);
>
> #ifdef KVM_CAP_VCPU_EVENTS
> s->vcpu_events = kvm_check_extension(s, KVM_CAP_VCPU_EVENTS);
> @@ -1687,13 +1729,15 @@ static int kvm_init(MachineState *ms)
> s->memory_listener.listener.eventfd_add = kvm_mem_ioeventfd_add;
> s->memory_listener.listener.eventfd_del = kvm_mem_ioeventfd_del;
> }
> - s->memory_listener.listener.coalesced_mmio_add = kvm_coalesce_mmio_region;
> - s->memory_listener.listener.coalesced_mmio_del = kvm_uncoalesce_mmio_region;
> + s->memory_listener.listener.coalesced_io_add = kvm_coalesce_mmio_region;
> + s->memory_listener.listener.coalesced_io_del = kvm_uncoalesce_mmio_region;
>
> kvm_memory_listener_register(s, &s->memory_listener,
> &address_space_memory, 0);
> memory_listener_register(&kvm_io_listener,
> &address_space_io);
> + memory_listener_register(&kvm_coalesced_pio_listener,
> + &address_space_io);
>
> s->many_ioeventfds = kvm_check_many_ioeventfds();
>
> @@ -1775,8 +1819,13 @@ void kvm_flush_coalesced_mmio_buffer(void)
> struct kvm_coalesced_mmio *ent;
>
> ent = &ring->coalesced_mmio[ring->first];
> -
> - cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
> + if (ent->pio == 1) {
> + address_space_rw(&address_space_io, ent->phys_addr,
> + MEMTXATTRS_UNSPECIFIED, ent->data,
> + ent->len, true);
> + } else {
> + cpu_physical_memory_write(ent->phys_addr, ent->data, ent->len);
> + }
> smp_wmb();
> ring->first = (ring->first + 1) % KVM_COALESCED_MMIO_MAX;
> }
> diff --git a/include/exec/memory.h b/include/exec/memory.h
> index 448d41a..4600fa3 100644
> --- a/include/exec/memory.h
> +++ b/include/exec/memory.h
> @@ -410,9 +410,9 @@ struct MemoryListener {
> bool match_data, uint64_t data, EventNotifier *e);
> void (*eventfd_del)(MemoryListener *listener, MemoryRegionSection *section,
> bool match_data, uint64_t data, EventNotifier *e);
> - void (*coalesced_mmio_add)(MemoryListener *listener, MemoryRegionSection *section,
> + void (*coalesced_io_add)(MemoryListener *listener, MemoryRegionSection *section,
> hwaddr addr, hwaddr len);
> - void (*coalesced_mmio_del)(MemoryListener *listener, MemoryRegionSection *section,
> + void (*coalesced_io_del)(MemoryListener *listener, MemoryRegionSection *section,
> hwaddr addr, hwaddr len);
> /* Lower = earlier (during add), later (during del) */
> unsigned priority;
> diff --git a/memory.c b/memory.c
> index e9cd446..8b0311e 100644
> --- a/memory.c
> +++ b/memory.c
> @@ -2126,7 +2126,7 @@ static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpa
> .size = fr->addr.size,
> };
>
> - MEMORY_LISTENER_CALL(as, coalesced_mmio_del, Reverse, §ion,
> + MEMORY_LISTENER_CALL(as, coalesced_io_del, Reverse, §ion,
> int128_get64(fr->addr.start),
> int128_get64(fr->addr.size));
> QTAILQ_FOREACH(cmr, &mr->coalesced, link) {
> @@ -2137,7 +2137,7 @@ static void memory_region_update_coalesced_range_as(MemoryRegion *mr, AddressSpa
> continue;
> }
> tmp = addrrange_intersection(tmp, fr->addr);
> - MEMORY_LISTENER_CALL(as, coalesced_mmio_add, Forward, §ion,
> + MEMORY_LISTENER_CALL(as, coalesced_io_add, Forward, §ion,
> int128_get64(tmp.start),
> int128_get64(tmp.size));
> }
> --
> 1.8.3.1
