From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:53402) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1dxfYx-0003rX-4Q for qemu-devel@nongnu.org; Thu, 28 Sep 2017 16:37:40 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1dxfYw-00039S-DU for qemu-devel@nongnu.org; Thu, 28 Sep 2017 16:37:39 -0400 Received: from mx1.redhat.com ([209.132.183.28]:58676) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1dxfYw-00039A-7L for qemu-devel@nongnu.org; Thu, 28 Sep 2017 16:37:38 -0400 From: David Hildenbrand Date: Thu, 28 Sep 2017 22:36:48 +0200 Message-Id: <20170928203708.9376-11-david@redhat.com> In-Reply-To: <20170928203708.9376-1-david@redhat.com> References: <20170928203708.9376-1-david@redhat.com> Subject: [Qemu-devel] [PATCH v2 10/30] target/s390x: interpret PSW_MASK_WAIT only for TCG List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: thuth@redhat.com, cohuck@redhat.com, Christian Borntraeger , Alexander Graf , Richard Henderson , David Hildenbrand List-ID: KVM handles the wait PSW itself and triggers a WAIT ICPT in case it really want to sleep (disabled wait). This will later allow us to change the order of loading a restart interrupt and setting a CPU to OPERATING on SIGP RESTART without changing KVM behavior. Signed-off-by: David Hildenbrand --- target/s390x/helper.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/target/s390x/helper.c b/target/s390x/helper.c index 2d7df83c59..baa18777f1 100644 --- a/target/s390x/helper.c +++ b/target/s390x/helper.c @@ -147,7 +147,8 @@ void load_psw(CPUS390XState *env, uint64_t mask, uint64_t addr) s390_cpu_recompute_watchpoints(CPU(s390_env_get_cpu(env))); } - if (mask & PSW_MASK_WAIT) { + /* KVM will handle all WAITs and trigger a WAIT exit on disabled_wait */ + if (tcg_enabled() && (mask & PSW_MASK_WAIT)) { s390_handle_wait(s390_env_get_cpu(env)); } } -- 2.13.5