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[61.68.63.89]) by smtp.gmail.com with ESMTPSA id y10sm28243415pfm.66.2019.07.18.03.40.17 (version=TLS1_3 cipher=AEAD-AES256-GCM-SHA384 bits=256/256); Thu, 18 Jul 2019 03:40:22 -0700 (PDT) From: Nicholas Piggin To: qemu-ppc@nongnu.org, qemu-devel@nongnu.org Date: Thu, 18 Jul 2019 20:39:50 +1000 Message-Id: <20190718103951.10027-3-npiggin@gmail.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190718103951.10027-1-npiggin@gmail.com> References: <20190718103951.10027-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:4864:20::42d Subject: [Qemu-devel] [PATCH 2/3] machine: Add wakeup method to MachineClass 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: Eduardo Habkost , Nicholas Piggin , Luiz Capitulino , Christian Borntraeger , Gerd Hoffmann , Paolo Bonzini , David Gibson Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Waking from suspend is not logically a machine reset on all machines, particularly in the paravirtualized case rather than hardware emulated. The ppc spapr machine for example just invokes hypervisor to suspend, and expects that call to return with the machine in the same state (modulo some possible migration and reconfiguration details). Implement a machine ->wakeup method and use that if it exists. Signed-off-by: Nicholas Piggin --- include/hw/boards.h | 1 + vl.c | 29 ++++++++++++++++++++++++++++- 2 files changed, 29 insertions(+), 1 deletion(-) diff --git a/include/hw/boards.h b/include/hw/boards.h index a71d1a53a5..915ac3352b 100644 --- a/include/hw/boards.h +++ b/include/hw/boards.h @@ -180,6 +180,7 @@ struct MachineClass { void (*init)(MachineState *state); void (*reset)(MachineState *state); + void (*wakeup)(MachineState *state); void (*hot_add_cpu)(MachineState *state, const int64_t id, Error **errp); int (*kvm_type)(MachineState *machine, const char *arg); void (*smp_parse)(MachineState *ms, QemuOpts *opts); diff --git a/vl.c b/vl.c index ef3c7ab8b8..b9e9943458 100644 --- a/vl.c +++ b/vl.c @@ -1556,6 +1556,33 @@ void qemu_system_reset(ShutdownCause reason) cpu_synchronize_all_post_reset(); } +/* + * Wake the VM after suspend. + */ +static void qemu_system_wakeup(void) +{ + MachineClass *mc; + + mc = current_machine ? MACHINE_GET_CLASS(current_machine) : NULL; + + if (mc && mc->wakeup) { + mc->wakeup(current_machine); + } else { + /* + * Fall back to old reset wakeup method. Platforms supporting + * wakeup should be converted over to use ->wakeup and this + * fallback code removed. + */ + cpu_synchronize_all_states(); + if (mc && mc->reset) { + mc->reset(current_machine); + } else { + qemu_devices_reset(); + } + cpu_synchronize_all_post_reset(); + } +} + void qemu_system_guest_panicked(GuestPanicInformation *info) { qemu_log_mask(LOG_GUEST_ERROR, "Guest crashed"); @@ -1764,7 +1791,7 @@ static bool main_loop_should_exit(void) } if (qemu_wakeup_requested()) { pause_all_vcpus(); - qemu_system_reset(SHUTDOWN_CAUSE_NONE); + qemu_system_wakeup(); notifier_list_notify(&wakeup_notifiers, &wakeup_reason); wakeup_reason = QEMU_WAKEUP_REASON_NONE; resume_all_vcpus(); -- 2.20.1