From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:48103) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gDEyJ-0007JP-DU for qemu-devel@nongnu.org; Thu, 18 Oct 2018 16:32:44 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gDEyF-0006J5-8o for qemu-devel@nongnu.org; Thu, 18 Oct 2018 16:32:43 -0400 Received: from mail-wr1-x42b.google.com ([2a00:1450:4864:20::42b]:33364) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gDEy9-00068t-4E for qemu-devel@nongnu.org; Thu, 18 Oct 2018 16:32:33 -0400 Received: by mail-wr1-x42b.google.com with SMTP id e4-v6so35109830wrs.0 for ; Thu, 18 Oct 2018 13:32:27 -0700 (PDT) Sender: Paolo Bonzini From: Paolo Bonzini Date: Thu, 18 Oct 2018 22:31:35 +0200 Message-Id: <1539894735-14232-9-git-send-email-pbonzini@redhat.com> In-Reply-To: <1539894735-14232-1-git-send-email-pbonzini@redhat.com> References: <1539894735-14232-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PULL 08/48] target-i386 : add coalesced_pio API List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Peng Hao From: Peng Hao the primary API realization. Signed-off-by: Peng Hao Reviewed-by: Eduardo Habkost Message-Id: <1539795177-21038-3-git-send-email-peng.hao2@zte.com.cn> Signed-off-by: Paolo Bonzini --- accel/kvm/kvm-all.c | 56 ++++++++++++++++++++++++++++++++++++++++++++++++--- include/exec/memory.h | 4 ++-- memory.c | 4 ++-- 3 files changed, 57 insertions(+), 7 deletions(-) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index de12f78..4880a05 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -79,6 +79,7 @@ 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; @@ -560,6 +561,45 @@ 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); + } +} + +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; @@ -1616,6 +1656,8 @@ 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); @@ -1686,13 +1728,15 @@ 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(); @@ -1778,7 +1822,13 @@ void kvm_flush_coalesced_mmio_buffer(void) 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 3a427aa..667466b 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -419,9 +419,9 @@ 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 d852f11..51204aa 100644 --- a/memory.c +++ b/memory.c @@ -2129,7 +2129,7 @@ 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) { @@ -2140,7 +2140,7 @@ 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