From mboxrd@z Thu Jan 1 00:00:00 1970 From: Marcelo Tosatti Subject: [PATCH 18/37] Introduce VCPU self-signaling service Date: Mon, 14 Feb 2011 13:22:47 -0200 Message-ID: <46d62fac8a6a43453322b3305ab2fcb8ee594443.1297696986.git.mtosatti@redhat.com> References: Cc: qemu-devel@nongnu.org, kvm@vger.kernel.org, Jan Kiszka , Marcelo Tosatti To: Anthony Liguori Return-path: Received: from mx1.redhat.com ([209.132.183.28]:55374 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755748Ab1BNPZK (ORCPT ); Mon, 14 Feb 2011 10:25:10 -0500 In-Reply-To: Sender: kvm-owner@vger.kernel.org List-ID: From: Jan Kiszka Introduce qemu_cpu_kick_self to send SIG_IPI to the calling VCPU context. First user will be kvm. Signed-off-by: Jan Kiszka Signed-off-by: Marcelo Tosatti --- cpus.c | 21 +++++++++++++++++++++ qemu-common.h | 1 + 2 files changed, 22 insertions(+), 0 deletions(-) diff --git a/cpus.c b/cpus.c index 9a3fc31..6a85dc8 100644 --- a/cpus.c +++ b/cpus.c @@ -529,6 +529,17 @@ void qemu_cpu_kick(void *env) return; } +void qemu_cpu_kick_self(void) +{ +#ifndef _WIN32 + assert(cpu_single_env); + + raise(SIG_IPI); +#else + abort(); +#endif +} + void qemu_notify_event(void) { CPUState *env = cpu_single_env; @@ -831,6 +842,16 @@ void qemu_cpu_kick(void *_env) } } +void qemu_cpu_kick_self(void) +{ + assert(cpu_single_env); + + if (!cpu_single_env->thread_kicked) { + qemu_thread_signal(cpu_single_env->thread, SIG_IPI); + cpu_single_env->thread_kicked = true; + } +} + int qemu_cpu_self(void *_env) { CPUState *env = _env; diff --git a/qemu-common.h b/qemu-common.h index c7ff280..a4d9c21 100644 --- a/qemu-common.h +++ b/qemu-common.h @@ -288,6 +288,7 @@ void qemu_notify_event(void); /* Unblock cpu */ void qemu_cpu_kick(void *env); +void qemu_cpu_kick_self(void); int qemu_cpu_self(void *env); /* work queue */ -- 1.7.4 From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=57921 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1Pp0IQ-0000Dp-NO for qemu-devel@nongnu.org; Mon, 14 Feb 2011 10:25:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Pp0IM-00042H-JZ for qemu-devel@nongnu.org; Mon, 14 Feb 2011 10:25:02 -0500 Received: from mx1.redhat.com ([209.132.183.28]:58955) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Pp0IL-00040y-OG for qemu-devel@nongnu.org; Mon, 14 Feb 2011 10:24:58 -0500 From: Marcelo Tosatti Date: Mon, 14 Feb 2011 13:22:47 -0200 Message-Id: <46d62fac8a6a43453322b3305ab2fcb8ee594443.1297696986.git.mtosatti@redhat.com> In-Reply-To: References: Subject: [Qemu-devel] [PATCH 18/37] Introduce VCPU self-signaling service List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Anthony Liguori Cc: Jan Kiszka , Marcelo Tosatti , qemu-devel@nongnu.org, kvm@vger.kernel.org From: Jan Kiszka Introduce qemu_cpu_kick_self to send SIG_IPI to the calling VCPU context. First user will be kvm. Signed-off-by: Jan Kiszka Signed-off-by: Marcelo Tosatti --- cpus.c | 21 +++++++++++++++++++++ qemu-common.h | 1 + 2 files changed, 22 insertions(+), 0 deletions(-) diff --git a/cpus.c b/cpus.c index 9a3fc31..6a85dc8 100644 --- a/cpus.c +++ b/cpus.c @@ -529,6 +529,17 @@ void qemu_cpu_kick(void *env) return; } +void qemu_cpu_kick_self(void) +{ +#ifndef _WIN32 + assert(cpu_single_env); + + raise(SIG_IPI); +#else + abort(); +#endif +} + void qemu_notify_event(void) { CPUState *env = cpu_single_env; @@ -831,6 +842,16 @@ void qemu_cpu_kick(void *_env) } } +void qemu_cpu_kick_self(void) +{ + assert(cpu_single_env); + + if (!cpu_single_env->thread_kicked) { + qemu_thread_signal(cpu_single_env->thread, SIG_IPI); + cpu_single_env->thread_kicked = true; + } +} + int qemu_cpu_self(void *_env) { CPUState *env = _env; diff --git a/qemu-common.h b/qemu-common.h index c7ff280..a4d9c21 100644 --- a/qemu-common.h +++ b/qemu-common.h @@ -288,6 +288,7 @@ void qemu_notify_event(void); /* Unblock cpu */ void qemu_cpu_kick(void *env); +void qemu_cpu_kick_self(void); int qemu_cpu_self(void *env); /* work queue */ -- 1.7.4