From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:37830) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZyYhU-0001k5-Bs for qemu-devel@nongnu.org; Tue, 17 Nov 2015 00:21:05 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1ZyYhR-0006a1-7k for qemu-devel@nongnu.org; Tue, 17 Nov 2015 00:21:04 -0500 Received: from mga14.intel.com ([192.55.52.115]:38344) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1ZyYhR-0006Zw-0Z for qemu-devel@nongnu.org; Tue, 17 Nov 2015 00:21:01 -0500 From: Haozhong Zhang Date: Tue, 17 Nov 2015 13:20:37 +0800 Message-Id: <1447737639-6139-2-git-send-email-haozhong.zhang@intel.com> In-Reply-To: <1447737639-6139-1-git-send-email-haozhong.zhang@intel.com> References: <1447737639-6139-1-git-send-email-haozhong.zhang@intel.com> Subject: [Qemu-devel] [PATCH v5 1/3] target-i386: fallback vcpu's TSC rate to value returned by KVM List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org, Eduardo Habkost , "Dr. David Alan Gilbert" Cc: Haozhong Zhang , kvm@vger.kernel.org, "Michael S. Tsirkin" , Marcelo Tosatti , Paolo Bonzini , afaerber@suse.de, Richard Henderson If no user-specified TSC rate is present, we will try to set env->tsc_khz to the value returned by KVM_GET_TSC_KHZ. Signed-off-by: Haozhong Zhang --- target-i386/kvm.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/target-i386/kvm.c b/target-i386/kvm.c index 2a9953b..9e4d27f 100644 --- a/target-i386/kvm.c +++ b/target-i386/kvm.c @@ -832,6 +832,18 @@ int kvm_arch_init_vcpu(CPUState *cs) } } + /* + * If no user-specified TSC frequency is present, we will try to + * set env->tsc_khz to the value used by KVM. + */ + if (!env->tsc_khz) { + r = kvm_check_extension(cs->kvm_state, KVM_CAP_GET_TSC_KHZ) ? + kvm_vcpu_ioctl(cs, KVM_GET_TSC_KHZ) : -ENOTSUP; + if (r > 0) { + env->tsc_khz = r; + } + } + if (has_xsave) { env->kvm_xsave_buf = qemu_memalign(4096, sizeof(struct kvm_xsave)); } -- 2.4.8