From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id DCB5CC25B0D for ; Sun, 7 Aug 2022 22:13:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242296AbiHGWKx (ORCPT ); Sun, 7 Aug 2022 18:10:53 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50008 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237003AbiHGWHK (ORCPT ); Sun, 7 Aug 2022 18:07:10 -0400 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B89B7BC05; Sun, 7 Aug 2022 15:03:15 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1659909795; x=1691445795; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=oFXIR5guBM3IH/WRfBvZZDq02VrN8ETcFKxC55g5V10=; b=K/SqWjbtV0ehqfT7W3n3xc1dOaGPItuaTWB4GQ4vnSvUE1IZjpfVY6o/ JnsVsrnaKZAsFmVZ7sbdHzJH+R3+esz8d7Ob3dcRPx4y0I4+hDLnHKWZB L+U8oGYZPOVm5wURQmZPi+Ex2jLNDgeA03/8nRA5aBrGRY6HTTYKvnCWV VSpLjKFtNy+0wAKo2M8fi6NbZEBS8g6HGz+UVevXYTFkw4khdDn2+7jqG H1zqr6iylCUX0rIATmg3Y8nyRxsTCU35Of2YQsyf2pescoBFB5jOCxc5N RJg3M8qA333XylWBGEqm4hcmR409+99hIOrNeENqd0PBeHAGjpOju09x0 A==; X-IronPort-AV: E=McAfee;i="6400,9594,10432"; a="270240396" X-IronPort-AV: E=Sophos;i="5.93,220,1654585200"; d="scan'208";a="270240396" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Aug 2022 15:02:42 -0700 X-IronPort-AV: E=Sophos;i="5.93,220,1654585200"; d="scan'208";a="663682731" Received: from ls.sc.intel.com (HELO localhost) ([143.183.96.54]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Aug 2022 15:02:42 -0700 From: isaku.yamahata@intel.com To: kvm@vger.kernel.org, linux-kernel@vger.kernel.org Cc: isaku.yamahata@intel.com, isaku.yamahata@gmail.com, Paolo Bonzini , erdemaktas@google.com, Sean Christopherson , Sagi Shahar Subject: [PATCH v8 087/103] KVM: TDX: handle EXCEPTION_NMI and EXTERNAL_INTERRUPT Date: Sun, 7 Aug 2022 15:02:12 -0700 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Isaku Yamahata Because guest TD state is protected, exceptions in guest TDs can't be intercepted. TDX VMM doesn't need to handle exceptions. tdx_handle_exit_irqoff() handles NMI and machine check. Ignore NMI and machine check and continue guest TD execution. For external interrupt, increment stats same to the VMX case. Signed-off-by: Isaku Yamahata Reviewed-by: Paolo Bonzini --- arch/x86/kvm/vmx/tdx.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index de618935fe01..7524bd8374be 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -839,6 +839,25 @@ void tdx_handle_exit_irqoff(struct kvm_vcpu *vcpu) tdexit_intr_info(vcpu)); } +static int tdx_handle_exception(struct kvm_vcpu *vcpu) +{ + u32 intr_info = tdexit_intr_info(vcpu); + + if (is_nmi(intr_info) || is_machine_check(intr_info)) + return 1; + + kvm_pr_unimpl("unexpected exception 0x%x(exit_reason 0x%llx qual 0x%lx)\n", + intr_info, + to_tdx(vcpu)->exit_reason.full, tdexit_exit_qual(vcpu)); + return -EFAULT; +} + +static int tdx_handle_external_interrupt(struct kvm_vcpu *vcpu) +{ + ++vcpu->stat.irq_exits; + return 1; +} + static int tdx_handle_triple_fault(struct kvm_vcpu *vcpu) { vcpu->run->exit_reason = KVM_EXIT_SHUTDOWN; @@ -1248,6 +1267,10 @@ int tdx_handle_exit(struct kvm_vcpu *vcpu, fastpath_t fastpath) WARN_ON_ONCE(fastpath != EXIT_FASTPATH_NONE); switch (exit_reason.basic) { + case EXIT_REASON_EXCEPTION_NMI: + return tdx_handle_exception(vcpu); + case EXIT_REASON_EXTERNAL_INTERRUPT: + return tdx_handle_external_interrupt(vcpu); case EXIT_REASON_EPT_VIOLATION: return tdx_handle_ept_violation(vcpu); case EXIT_REASON_EPT_MISCONFIG: -- 2.25.1