| Message ID | 1435163110-2724-10-git-send-email-pbonzini@redhat.com |
|---|---|
| State | New |
| Headers | show |
diff --git a/kvm-all.c b/kvm-all.c index 07bdcfa..9053ef9 100644 --- a/kvm-all.c +++ b/kvm-all.c @@ -1811,13 +1811,12 @@ int kvm_cpu_exec(CPUState *cpu) break; case KVM_EXIT_MMIO: DPRINTF("handle_mmio\n"); - qemu_mutex_lock_iothread(); + /* Called outside BQL */ address_space_rw(&address_space_memory, run->mmio.phys_addr, attrs, run->mmio.data, run->mmio.len, run->mmio.is_write); - qemu_mutex_unlock_iothread(); ret = 0; break; case KVM_EXIT_IRQ_WINDOW_OPEN:
Do not take the BQL before dispatching MMIO requests of KVM VCPUs. Instead, address_space_rw will do it if necessary. This enables completely BQL-free MMIO handling in KVM mode for upcoming devices with fine-grained locking. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <1434646046-27150-10-git-send-email-pbonzini@redhat.com> --- kvm-all.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)