From patchwork Thu Jan 30 00:10:23 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sean Christopherson X-Patchwork-Id: 11357267 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 DB379921 for ; Thu, 30 Jan 2020 00:11:48 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id B9BB42070E for ; Thu, 30 Jan 2020 00:11:48 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="Q5yRezHZ" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B9BB42070E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=NhhaK38FMuSf44ZcIhxrQLyxl8Wwncuz5YSGw54SRSg=; b=Q5yRezHZ4m2zCq 6gBn1+YU6JohMKyY5UusdUM8H2c8Wj+QfPBAHqHoiPhmeOf+d3mhdzRmRRVfLza958p7Q0iWJEpo3 53M0Fa0k/GJr53+Th6UjpKFJOqMwmk+9x3XbMXhTIgXb19uZ1tGGsOUCzoCUQ9CQb4/2U7r+1IiaZ W7PW+kNYTNDx8AMSBW9R+3Q0VvTXxagswTh1czSsqthnQfO/RaAfXGt/SjATnXiedWzyHZvBvA9YJ HnvvXB8Ta7VnaPEhUAxO7LZGwfDMFJugzNk9smA8vFjFSag5M3JQecQ91nZwDOaBAvuunBR93q/ch Bby5WL0FLRIOL17cW6Og==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1iwxQw-0003ms-SA; Thu, 30 Jan 2020 00:11:46 +0000 Received: from mga18.intel.com ([134.134.136.126]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1iwxPj-0002ZZ-79 for linux-arm-kernel@lists.infradead.org; Thu, 30 Jan 2020 00:10:32 +0000 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by orsmga106.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 29 Jan 2020 16:10:30 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,379,1574150400"; d="scan'208";a="261990367" Received: from sjchrist-coffee.jf.intel.com ([10.54.74.202]) by fmsmga002.fm.intel.com with ESMTP; 29 Jan 2020 16:10:30 -0800 From: Sean Christopherson To: Paolo Bonzini Subject: [PATCH 5/5] KVM: x86: Set kvm_x86_ops only after ->hardware_setup() completes Date: Wed, 29 Jan 2020 16:10:23 -0800 Message-Id: <20200130001023.24339-6-sean.j.christopherson@intel.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20200130001023.24339-1-sean.j.christopherson@intel.com> References: <20200130001023.24339-1-sean.j.christopherson@intel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200129_161031_345179_F7552B0E X-CRM114-Status: GOOD ( 11.44 ) X-Spam-Score: -2.3 (--) X-Spam-Report: SpamAssassin version 3.4.3 on bombadil.infradead.org summary: Content analysis details: (-2.3 points) pts rule name description ---- ---------------------- -------------------------------------------------- -2.3 RCVD_IN_DNSWL_MED RBL: Sender listed at https://www.dnswl.org/, medium trust [134.134.136.126 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: linux-arm-kernel@lists.infradead.org, Wanpeng Li , Janosch Frank , kvm@vger.kernel.org, David Hildenbrand , Marc Zyngier , Joerg Roedel , Cornelia Huck , linux-mips@vger.kernel.org, Sean Christopherson , linux-kernel@vger.kernel.org, Paul Mackerras , Christian Borntraeger , James Morse , kvm-ppc@vger.kernel.org, Vitaly Kuznetsov , Suzuki K Poulose , kvmarm@lists.cs.columbia.edu, Julien Thierry , Jim Mattson Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Set kvm_x86_ops with the vendor's ops only after ->hardware_setup() completes to "prevent" using kvm_x86_ops before they are ready, i.e. to generate a null pointer fault instead of silently consuming unconfigured state. An alternative implementation would be to have ->hardware_setup() return the vendor's ops, but that would require non-trivial refactoring, and would arguably result in less readable code, e.g. ->hardware_setup() would need to use ERR_PTR() in multiple locations, and each vendor's declaration of the runtime ops would be less obvious. No functional change intended. Signed-off-by: Sean Christopherson --- arch/x86/kvm/x86.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index eb36762aa2ce..a9f733c4ca28 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -7326,8 +7326,6 @@ int kvm_arch_init(void *opaque) if (r) goto out_free_percpu; - kvm_x86_ops = ops->runtime_ops; - kvm_mmu_set_mask_ptes(PT_USER_MASK, PT_ACCESSED_MASK, PT_DIRTY_MASK, PT64_NX_MASK, 0, PT_PRESENT_MASK, 0, sme_me_mask); @@ -9588,6 +9586,8 @@ int kvm_arch_hardware_setup(void *opaque) if (r != 0) return r; + kvm_x86_ops = ops->runtime_ops; + cr4_reserved_bits = kvm_host_cr4_reserved_bits(&boot_cpu_data); if (kvm_has_tsc_control) {