From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:51778) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ROSyH-0001L5-FU for qemu-devel@nongnu.org; Thu, 10 Nov 2011 06:39:06 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ROSyD-0004gP-N4 for qemu-devel@nongnu.org; Thu, 10 Nov 2011 06:39:05 -0500 Received: from [195.131.132.186] (port=45509 helo=shelob.oktetlabs.ru) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ROSyD-0004g5-Bx for qemu-devel@nongnu.org; Thu, 10 Nov 2011 06:39:01 -0500 From: Max Filippov Date: Thu, 10 Nov 2011 15:38:42 +0400 Message-Id: <1320925122-4422-1-git-send-email-jcmvbkbc@gmail.com> Subject: [Qemu-devel] [PATCH v2] vl.c: prohibit simultaneous use of -icount with kvm or xen List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Paolo Bonzini , Max Filippov With -icount, The vm_clock is updated with help from TCG (it counts instructions at 2^ICOUNT ns/instructions). With KVM, the instruction count is not available so KVM cannot provide this help. Signed-off-by: Max Filippov Acked-by: Paolo Bonzini --- v1 -> v2 changes: - cover both kvm and xen; - add explanation text. --- vl.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/vl.c b/vl.c index f169aac..bb601e2 100644 --- a/vl.c +++ b/vl.c @@ -3226,6 +3226,11 @@ int main(int argc, char **argv, char **envp) fprintf(stderr, "could not initialize alarm timer\n"); exit(1); } + + if (icount_option && (kvm_enabled() || xen_enabled())) { + fprintf(stderr, "-icount is not allowed with kvm or xen\n"); + exit(1); + } configure_icount(icount_option); if (net_init_clients() < 0) { -- 1.7.2.5