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David Alan Gilbert" , Claudio Fontana , Julien Grall Subject: [PATCH v6 37/51] hw/xen: Implement EVTCHNOP_reset Date: Tue, 10 Jan 2023 12:20:28 +0000 Message-Id: <20230110122042.1562155-38-dwmw2@infradead.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20230110122042.1562155-1-dwmw2@infradead.org> References: <20230110122042.1562155-1-dwmw2@infradead.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SRS-Rewrite: SMTP reverse-path rewritten from by desiato.infradead.org. See http://www.infradead.org/rpr.html Received-SPF: none client-ip=2001:8b0:10b:1:d65d:64ff:fe57:4e05; envelope-from=BATV+6ce08bad6b360d6d5e23+7079+infradead.org+dwmw2@desiato.srs.infradead.org; helo=desiato.infradead.org X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 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, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: David Woodhouse Signed-off-by: David Woodhouse --- hw/i386/kvm/xen_evtchn.c | 29 +++++++++++++++++++++++++++++ hw/i386/kvm/xen_evtchn.h | 3 +++ target/i386/kvm/xen-emu.c | 17 +++++++++++++++++ 3 files changed, 49 insertions(+) diff --git a/hw/i386/kvm/xen_evtchn.c b/hw/i386/kvm/xen_evtchn.c index ad75cddc5e..6b6df39978 100644 --- a/hw/i386/kvm/xen_evtchn.c +++ b/hw/i386/kvm/xen_evtchn.c @@ -738,6 +738,35 @@ static int close_port(XenEvtchnState *s, evtchn_port_t port) return 0; } +int xen_evtchn_soft_reset(void) +{ + XenEvtchnState *s = xen_evtchn_singleton; + int i; + + if (!s) { + return -ENOTSUP; + } + + qemu_mutex_lock(&s->port_lock); + + for (i = 0; i < s->nr_ports; i++) { + close_port(s, i); + } + + qemu_mutex_unlock(&s->port_lock); + + return 0; +} + +int xen_evtchn_reset_op(struct evtchn_reset *reset) +{ + if (reset->dom != DOMID_SELF && reset->dom != xen_domid) { + return -ESRCH; + } + + return xen_evtchn_soft_reset(); +} + int xen_evtchn_close_op(struct evtchn_close *close) { XenEvtchnState *s = xen_evtchn_singleton; diff --git a/hw/i386/kvm/xen_evtchn.h b/hw/i386/kvm/xen_evtchn.h index 486b031c82..5d3e03553f 100644 --- a/hw/i386/kvm/xen_evtchn.h +++ b/hw/i386/kvm/xen_evtchn.h @@ -13,6 +13,7 @@ #define QEMU_XEN_EVTCHN_H void xen_evtchn_create(void); +int xen_evtchn_soft_reset(void); int xen_evtchn_set_callback_param(uint64_t param); struct evtchn_status; @@ -24,6 +25,7 @@ struct evtchn_send; struct evtchn_alloc_unbound; struct evtchn_bind_interdomain; struct evtchn_bind_vcpu; +struct evtchn_reset; int xen_evtchn_status_op(struct evtchn_status *status); int xen_evtchn_close_op(struct evtchn_close *close); int xen_evtchn_unmask_op(struct evtchn_unmask *unmask); @@ -33,5 +35,6 @@ int xen_evtchn_send_op(struct evtchn_send *send); int xen_evtchn_alloc_unbound_op(struct evtchn_alloc_unbound *alloc); int xen_evtchn_bind_interdomain_op(struct evtchn_bind_interdomain *interdomain); int xen_evtchn_bind_vcpu_op(struct evtchn_bind_vcpu *vcpu); +int xen_evtchn_reset_op(struct evtchn_reset *reset); #endif /* QEMU_XEN_EVTCHN_H */ diff --git a/target/i386/kvm/xen-emu.c b/target/i386/kvm/xen-emu.c index afc6d28357..730284a067 100644 --- a/target/i386/kvm/xen-emu.c +++ b/target/i386/kvm/xen-emu.c @@ -950,6 +950,18 @@ static bool kvm_xen_hcall_evtchn_op(struct kvm_xen_exit *exit, X86CPU *cpu, err = xen_evtchn_bind_vcpu_op(&vcpu); break; } + case EVTCHNOP_reset: { + struct evtchn_reset reset; + + qemu_build_assert(sizeof(reset) == 2); + if (kvm_copy_from_gva(cs, arg, &reset, sizeof(reset))) { + err = -EFAULT; + break; + } + + err = xen_evtchn_reset_op(&reset); + break; + } default: return false; } @@ -963,6 +975,11 @@ static int kvm_xen_soft_reset(void) CPUState *cpu; int err; + err = xen_evtchn_soft_reset(); + if (err) { + return err; + } + err = xen_evtchn_set_callback_param(0); if (err) { return err; -- 2.35.3