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That's all we know. X-Spam_score_int: -2 X-Spam_score: -0.3 X-Spam_bar: / X-Spam_report: (-0.3 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_ENVFROM_END_DIGIT=0.25, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_SORBS_WEB=1.5, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini , Cornelia Huck , kvm@vger.kernel.org, "Michael S. Tsirkin" Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This patch adds kvm_set_ioeventfd_read and dummy_notifier_read functons to test ioeventfd read support. When the guess writes to address provided in kvm_set_ioeventfd_read function, dummy_notifier_read prints to stdio. Signed-off-by: Amey Narkhede --- accel/kvm/kvm-all.c | 55 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 55 insertions(+) diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c index 9ef5daf4c5..357e74d84c 100644 --- a/accel/kvm/kvm-all.c +++ b/accel/kvm/kvm-all.c @@ -1006,6 +1006,43 @@ static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size) return val; } +static void dummy_notifier_read(EventNotifier *n) +{ + printf("Received ioeventfd read event\n"); + event_notifier_test_and_clear(n); +} + +static int kvm_set_ioeventfd_read(int fd, hwaddr addr, uint64_t val, + uint64_t size, bool datamatch) +{ + int ret; + struct kvm_ioeventfd ioevent = { + .datamatch = datamatch ? adjust_ioeventfd_endianness(val, size) : 0, + .dataread = val, + .addr = addr, + .len = size, + .flags = KVM_IOEVENTFD_FLAG_DATAREAD, + .fd = fd, + }; + + if (!kvm_enabled()) { + return -ENOSYS; + } + + if (datamatch) { + ioevent.flags |= KVM_IOEVENTFD_FLAG_DATAMATCH; + } + + ret = kvm_vm_ioctl(kvm_state, KVM_IOEVENTFD, &ioevent); + + if (ret < 0) { + return -errno; + } + + return 0; +} + + static int kvm_set_ioeventfd_mmio(int fd, hwaddr addr, uint32_t val, bool assign, uint32_t size, bool datamatch) { @@ -2012,6 +2049,7 @@ static int kvm_init(MachineState *ms) KVMState *s; const KVMCapabilityInfo *missing_cap; int ret; + int efd = -1; int type = 0; const char *kvm_type; uint64_t dirty_log_manual_caps; @@ -2253,6 +2291,22 @@ static int kvm_init(MachineState *ms) } cpus_register_accel(&kvm_cpus); + + EventNotifier *e = g_malloc0(sizeof(EventNotifier)); + ret = event_notifier_init(e, false); + if (ret < 0) { + printf("Failed to initialize EventNotifier\n"); + } + else { + AioContext *ctx = qemu_get_aio_context(); + efd = event_notifier_get_fd(e); + aio_set_event_notifier(ctx, e, false, dummy_notifier_read, NULL); + ret = kvm_set_ioeventfd_read(efd, 0xff01003f, 123, 8, false); + if (ret < 0) + printf("ioeventfd read failed\n"); + } + + return 0; err: @@ -2268,6 +2322,7 @@ err: return ret; } + void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) { s->sigmask_len = sigmask_len;