From patchwork Fri Nov 22 22:39:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 11258537 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DDE6B14C0 for ; Fri, 22 Nov 2019 22:40:20 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BDE5D20726 for ; Fri, 22 Nov 2019 22:40:20 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726990AbfKVWkG (ORCPT ); Fri, 22 Nov 2019 17:40:06 -0500 Received: from mga01.intel.com ([192.55.52.88]:61230 "EHLO mga01.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726729AbfKVWkG (ORCPT ); Fri, 22 Nov 2019 17:40:06 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga006.fm.intel.com ([10.253.24.20]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 22 Nov 2019 14:40:05 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,231,1571727600"; d="scan'208";a="409029712" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.41]) by fmsmga006.fm.intel.com with ESMTP; 22 Nov 2019 14:40:05 -0800 From: Sean Christopherson To: Paolo Bonzini , =?utf-8?b?UmFkaW0gS3LEjW3DocWZ?= Cc: Sean Christopherson , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH 13/13] KVM: x86: Allow userspace to disable the kernel's emulator Date: Fri, 22 Nov 2019 14:39:59 -0800 Message-Id: <20191122223959.13545-14-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.24.0 In-Reply-To: <20191122223959.13545-1-sean.j.christopherson@intel.com> References: <20191122223959.13545-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Expose the emulator control to userspace via a module param. Signed-off-by: Sean Christopherson --- arch/x86/kvm/x86.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 312dd5f8172c..4e5a27874656 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -155,7 +155,8 @@ EXPORT_SYMBOL_GPL(enable_vmware_backdoor); static bool __read_mostly force_emulation_prefix = false; module_param(force_emulation_prefix, bool, S_IRUGO); -static const bool enable_emulator = true; +static bool __read_mostly enable_emulator = true; +module_param_named(emulator, enable_emulator, bool, 0440); int __read_mostly pi_inject_timer = -1; module_param(pi_inject_timer, bint, S_IRUGO | S_IWUSR);