From patchwork Thu Nov 21 18:52:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mingwei Zhang X-Patchwork-Id: 844834 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 7255B1DF731 for ; Thu, 21 Nov 2024 18:53:30 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.128.202 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732215212; cv=none; b=VugVkMIZesad2Zr/arCU6Nxu5UhsUuxTgN7qCH2fCs6Y5KTLIspnhwhpTywcZ0A0djbBBBPrXRj9y4M14+nlmJfZIBUhrCphWzkKiy8BbM1iZ/Js+TuLTBhUU424WTM53RD2YJFNU/INrQJ2BHQASjFic4Fkps1tyZwIhi20by0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732215212; c=relaxed/simple; bh=HIwgyq0n9Pc6IQ1JW0mNNbc4Q1w8gUiM8GLpxz3MNio=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=uqauNA4MCwbNdLmVqrtCgaKxeeeR7MykYsrIUoitJe+1Ke79IvlkZhjl79S6tEQ1mWlV3DTkP3GCj8IVE/k86dLTNRZLCdWCbI+B90poRI8mVzewmvOw/obvA5/ysQKDoP2SCEzkAIhKLJW8X9blT2vihZYiUwVItWMXLJhXnBo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--mizhang.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=ZmRG4+Du; arc=none smtp.client-ip=209.85.128.202 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=flex--mizhang.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="ZmRG4+Du" Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-6eeab4be015so21612567b3.0 for ; Thu, 21 Nov 2024 10:53:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1732215209; x=1732820009; darn=vger.kernel.org; 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=179m8kOvQfRqP37wmtAhsMQnswgm0gukoWaPbObarIY=; b=ZmRG4+DuMWNCDnDdrGbuILOaPLCIfuysnoc2coDwQ9tvZBu971oWt8QGQk/v0ZG8SB lh5yW9bVqyx41EYwpRhDt36BkHYVPtwoBFU9mOdt9BI4okKYZTl0Y60nUhZiUkXKkGnc 93ejV7dIWXIb3QafDV6dDwcIWoxGsGmwlBmk9vUh3e2EZ6aRHGpO823QSDtTPjf1VWTp 4K7z+Gd2pl7/RRaZ/yK1kZVyAxuPbfBXYG55UrptpxAvdQNMc1mU7XR3ZDQL1lPPiRtY hYJwGYmF0PTApfT5w1xPuVXyEkO1p2x06sKtUegp7cX4vLjMdy0J7luuiyXrV9yV8mXw aBtw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1732215209; x=1732820009; 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=179m8kOvQfRqP37wmtAhsMQnswgm0gukoWaPbObarIY=; b=MTaP6YpJUksp7PJ5KKfTsVOuLqGuMWN0GD70hFuAppYBFMZ3YDmesWimJV6MBFFFll xVuTgfgIXeqGjPDk16mC3zzGs3x5YCcpxnsnmQmHBJQidTW+N/C1rCP38MVO7XG4uBE4 4N2rhh38BohbrDs1tZLuvV/8iaTQYMrk8i3Fz+9glw11GQDVJHJ/2LmTQuKOkgD9UJns XbsudI3jMpw5H9sNpb/AcHKpW+XeEyQlrnKwRjl77uXbQVy6HY7KcGuylpYg51eTVHUY lLy55+mr8sQbdsHOrw9u/+qYA3YCMKS0q1lktXDEpOD8J2NOJubo7BD6t30HM2S71vLG 4hqg== X-Forwarded-Encrypted: i=1; AJvYcCWBAZYKTQ7XTleDgk81APPjz7goQ3lVIsdiNYLre5xfswVKGBQ0ESHIHaLRgLnEC1sTBHmdriQ6+g==@vger.kernel.org X-Gm-Message-State: AOJu0YzfpJ8T7GMQLtUQX0QbJw4+Uv+q1SkzACBIOTWBCCru1mCQToZ9 zMyO7ntd79lypXUecwAWOOzHHhG2VlNdFERGLrqDLehgiGlqDjr1EUDS505rY2MH4sObkdspR5t zM2DyhA== X-Google-Smtp-Source: AGHT+IHDdAZrVVVtQkbNY+ODhRentmxWbP6Rfzn5FkbIRQBeRGy86k9mMoUCty77jPdE55ldMhNkDkbK1cVV X-Received: from mizhang-super.c.googlers.com ([35.247.89.60]) (user=mizhang job=sendgmr) by 2002:a05:690c:4b07:b0:663:ddc1:eab8 with SMTP id 00721157ae682-6eee0a26d5emr29857b3.4.1732215209587; Thu, 21 Nov 2024 10:53:29 -0800 (PST) Reply-To: Mingwei Zhang Date: Thu, 21 Nov 2024 18:52:59 +0000 In-Reply-To: <20241121185315.3416855-1-mizhang@google.com> Precedence: bulk X-Mailing-List: linux-pm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20241121185315.3416855-1-mizhang@google.com> X-Mailer: git-send-email 2.47.0.371.ga323438b13-goog Message-ID: <20241121185315.3416855-8-mizhang@google.com> Subject: [RFC PATCH 07/22] KVM: nSVM: Nested #VMEXIT may transition from HALTED to RUNNABLE From: Mingwei Zhang To: Sean Christopherson , Paolo Bonzini , Huang Rui , "Gautham R. Shenoy" , Mario Limonciello , "Rafael J. Wysocki" , Viresh Kumar , Srinivas Pandruvada , Len Brown Cc: "H. Peter Anvin" , Perry Yuan , kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Jim Mattson , Mingwei Zhang From: Jim Mattson When a halted vCPU is awakened by a nested event, it might have been the target of a previous KVM_HC_KICK_CPU hypercall, in which case pv_unhalted would be set. This flag should be cleared before the next HLT instruction, as kvm_vcpu_has_events() would otherwise return true and prevent the vCPU from entering the halt state. Use kvm_vcpu_make_runnable() to ensure consistent handling of the HALTED to RUNNABLE state transition. Fixes: 38c0b192bd6d ("KVM: SVM: leave halted state on vmexit") Signed-off-by: Jim Mattson --- arch/x86/kvm/svm/nested.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/svm/nested.c b/arch/x86/kvm/svm/nested.c index cf84103ce38b9..49e6cdfeac4da 100644 --- a/arch/x86/kvm/svm/nested.c +++ b/arch/x86/kvm/svm/nested.c @@ -994,7 +994,7 @@ int nested_svm_vmexit(struct vcpu_svm *svm) kvm_clear_request(KVM_REQ_GET_NESTED_STATE_PAGES, vcpu); /* in case we halted in L2 */ - svm->vcpu.arch.mp_state = KVM_MP_STATE_RUNNABLE; + kvm_vcpu_make_runnable(vcpu); /* Give the current vmcb to the guest */