From nobody Tue Feb 10 06:05:01 2026 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 1EC52C77B7C for ; Fri, 12 May 2023 23:52:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S241094AbjELXwf (ORCPT ); Fri, 12 May 2023 19:52:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52474 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241522AbjELXv7 (ORCPT ); Fri, 12 May 2023 19:51:59 -0400 Received: from mail-pf1-x449.google.com (mail-pf1-x449.google.com [IPv6:2607:f8b0:4864:20::449]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7DE67E70A for ; Fri, 12 May 2023 16:51:17 -0700 (PDT) Received: by mail-pf1-x449.google.com with SMTP id d2e1a72fcca58-643842c87dbso10938665b3a.1 for ; Fri, 12 May 2023 16:51:17 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1683935460; x=1686527460; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=uTLS7GH4gIRN1PlS1PI+vIgLYG0J1IjMSATijGXdups=; b=kvQYtK4ceeq9iZaPajPCSno8Cvvhd5VB84yKUQcF9KyPXp6xW2qCq2himmqvfIWrmV XS2/4cPWvCWx/B488GJX566n8/8ilhQq/DY0YloUmQOSqBWvkuqSLRuicMKHkFbgLEH0 iHFrz2cCM4pBbAQSxkSIWK4a+ER/P+Ab7G8ulD0CZ8Be/7qNvOUkGhNRwc9i2tYYZbcQ eTTg+rc77wJkODC5XlDluglqiaCVRYPVyeUR5BrjeZ43h6NiSQA9IRt/shLAf1iU00GD zEjzDDopsLWUlIfMaEmjPlTIPse3nCvqcU0oOiHfmZ1BfK6pgwYjT5Ym/Ub1p/6CA2Sc PTQA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683935461; x=1686527461; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=uTLS7GH4gIRN1PlS1PI+vIgLYG0J1IjMSATijGXdups=; b=gn8mRqqsTRSefif+95wsIesL+nIxxey2BrxyvkZ21rQKoZhksiuNbLIqNB8tHoaBI5 Pv6kcApUipR1Z90G+HAJNaiPEKQJJVDSXH0sUYhesexmuVr8htOY3IyZoIrOVE+N7ZRY MnzrukBW+SX3Q4zya7GAeruqctWtAJ+EAh0/Tc66lBVa6MXrve52jFQmBmyn761QQAfC h/hPh3bcSNybxFrLHJ2Uk55UtG3MHu9F+ca7vcVJnGKwbyLIPrLFEDsV57W40fBsiIXu 4zfDe/BeeGUrOwXp5P03LQVkIjNgpMGeE4hrZCPYFXxlecHGAN7TMOHBvFY8Uzy/qHP0 fFhA== X-Gm-Message-State: AC+VfDzTabDsbcUk+Pysm2o7/Khi+YO/sKTt196QFNo+VuYPDn0X67OL 2i0TtY3Q/qIrh6o91AXIvBgmzFO8AP0= X-Google-Smtp-Source: ACHHUZ4FwMhCcIgCPfM5PBRpMD0yIf/X+GpptsjLvWUKlWl6UEbBBfCviS/y32hPpZQMovy3+EuAUfAPf9o= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:6a00:80dc:b0:643:85a7:b49c with SMTP id ei28-20020a056a0080dc00b0064385a7b49cmr7155796pfb.5.1683935460717; Fri, 12 May 2023 16:51:00 -0700 (PDT) Reply-To: Sean Christopherson Date: Fri, 12 May 2023 16:50:25 -0700 In-Reply-To: <20230512235026.808058-1-seanjc@google.com> Mime-Version: 1.0 References: <20230512235026.808058-1-seanjc@google.com> X-Mailer: git-send-email 2.40.1.606.ga4b1b128d6-goog Message-ID: <20230512235026.808058-18-seanjc@google.com> Subject: [PATCH v3 17/18] KVM: x86: Force kvm_rebooting=true during emergency reboot/crash From: Sean Christopherson To: Sean Christopherson , Paolo Bonzini Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Cooper , Kai Huang , Chao Gao Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" Set kvm_rebooting when virtualization is disabled in an emergency so that KVM eats faults on virtualization instructions even if kvm_reboot() isn't reached. Signed-off-by: Sean Christopherson Reviewed-by: Kai Huang --- arch/x86/kvm/svm/svm.c | 2 ++ arch/x86/kvm/vmx/vmx.c | 2 ++ 2 files changed, 4 insertions(+) diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c index 2cc195d95d32..d00da133b14f 100644 --- a/arch/x86/kvm/svm/svm.c +++ b/arch/x86/kvm/svm/svm.c @@ -611,6 +611,8 @@ static inline void kvm_cpu_svm_disable(void) =20 static void svm_emergency_disable(void) { + kvm_rebooting =3D true; + kvm_cpu_svm_disable(); } =20 diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index 008914396180..1dec932aff21 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -771,6 +771,8 @@ static void vmx_emergency_disable(void) int cpu =3D raw_smp_processor_id(); struct loaded_vmcs *v; =20 + kvm_rebooting =3D true; + list_for_each_entry(v, &per_cpu(loaded_vmcss_on_cpu, cpu), loaded_vmcss_on_cpu_link) vmcs_clear(v->vmcs); --=20 2.40.1.606.ga4b1b128d6-goog