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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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" This patch introduces a new flag KVM_IOEVENTFD_FLAG_DATAREAD in ioeventfd to enable receiving a notification when a guest reads from registered PIO/MMIO address. Signed-off-by: Amey Narkhede --- linux-headers/linux/kvm.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h index 43580c767c..3e71d15a53 100644 --- a/linux-headers/linux/kvm.h +++ b/linux-headers/linux/kvm.h @@ -695,6 +695,7 @@ struct kvm_guest_debug { =20 enum { kvm_ioeventfd_flag_nr_datamatch, + kvm_ioeventfd_flag_nr_dataread, kvm_ioeventfd_flag_nr_pio, kvm_ioeventfd_flag_nr_deassign, kvm_ioeventfd_flag_nr_virtio_ccw_notify, @@ -703,6 +704,7 @@ enum { }; =20 #define KVM_IOEVENTFD_FLAG_DATAMATCH (1 << kvm_ioeventfd_flag_nr_datamatch) +#define KVM_IOEVENTFD_FLAG_DATAREAD (1 << kvm_ioeventfd_flag_nr_dataread) #define KVM_IOEVENTFD_FLAG_PIO (1 << kvm_ioeventfd_flag_nr_pio) #define KVM_IOEVENTFD_FLAG_DEASSIGN (1 << kvm_ioeventfd_flag_nr_deassign) #define KVM_IOEVENTFD_FLAG_VIRTIO_CCW_NOTIFY \ @@ -712,11 +714,12 @@ enum { =20 struct kvm_ioeventfd { __u64 datamatch; + __u64 dataread; __u64 addr; /* legal pio/mmio address */ __u32 len; /* 1, 2, 4, or 8 bytes; or 0 to ignore length */ __s32 fd; __u32 flags; - __u8 pad[36]; + __u8 pad[28]; }; =20 #define KVM_X86_DISABLE_EXITS_MWAIT (1 << 0) --=20 2.28.0 From nobody Sun May 19 05:22:48 2024 Delivered-To: importer@patchew.org Authentication-Results: mx.zohomail.com; dkim=fail; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org; dmarc=fail(p=none dis=none) header.from=gmail.com ARC-Seal: i=1; a=rsa-sha256; t=1603213384; cv=none; d=zohomail.com; s=zohoarc; b=HEyp7bq+e/OipPpP9k/j0s0/mJrAhnfpJNIMrbbugiJVoDzRlu0IAz/zUJDgykD71hX/yeHw9pqE9C9uK/P7eTjgwM+/+aO3SmdjXzcYuBjocmF41SwkkLie1vIkHDPjxLWMDno8C8bbPzA9xJRwd2zy21uY+TcHY8DJlQBBHxI= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1603213384; h=Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To; 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envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::1043; envelope-from=ameynarkhede03@gmail.com; helo=mail-pj1-x1043.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. 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+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) Content-Type: text/plain; charset="utf-8" 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; } =20 +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 =3D { + .datamatch =3D datamatch ? adjust_ioeventfd_endianness(val, size)= : 0, + .dataread =3D val, + .addr =3D addr, + .len =3D size, + .flags =3D KVM_IOEVENTFD_FLAG_DATAREAD, + .fd =3D fd, + }; + + if (!kvm_enabled()) { + return -ENOSYS; + } + + if (datamatch) { + ioevent.flags |=3D KVM_IOEVENTFD_FLAG_DATAMATCH; + } + + ret =3D 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 datamat= ch) { @@ -2012,6 +2049,7 @@ static int kvm_init(MachineState *ms) KVMState *s; const KVMCapabilityInfo *missing_cap; int ret; + int efd =3D -1; int type =3D 0; const char *kvm_type; uint64_t dirty_log_manual_caps; @@ -2253,6 +2291,22 @@ static int kvm_init(MachineState *ms) } =20 cpus_register_accel(&kvm_cpus); + + EventNotifier *e =3D g_malloc0(sizeof(EventNotifier)); + ret =3D event_notifier_init(e, false); + if (ret < 0) { + printf("Failed to initialize EventNotifier\n"); + } + else { + AioContext *ctx =3D qemu_get_aio_context(); + efd =3D event_notifier_get_fd(e); + aio_set_event_notifier(ctx, e, false, dummy_notifier_read, NULL); + ret =3D kvm_set_ioeventfd_read(efd, 0xff01003f, 123, 8, false); + if (ret < 0) + printf("ioeventfd read failed\n"); + } + + return 0; =20 err: @@ -2268,6 +2322,7 @@ err: return ret; } =20 + void kvm_set_sigmask_len(KVMState *s, unsigned int sigmask_len) { s->sigmask_len =3D sigmask_len; --=20 2.28.0