From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pj1-f74.google.com (mail-pj1-f74.google.com [209.85.216.74]) (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 29EDE271468 for ; Thu, 14 Aug 2025 16:18:04 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.216.74 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755188286; cv=none; b=PQKp6j8TR5Tvb7EKdm5w4vc8Ym7zfb+eAU28gv802t6cbyDczE+05a99+OA68dTK7QVOglNKoMPEtTvJjZSPDHSj6be8zNEIF8quUaYCL5W6B0UFlSX+EmNmUWskvSV2lBni1UqXiHO6+8Vl83+IGFJiWp4DnMwoiFkCD96Wa+M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755188286; c=relaxed/simple; bh=3M6olNCkfBgg79SBlkoN6YaHd1iwdF64SMcb1OiDJSA=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=PLscWnwMn4/JS1PmPl4VZ3m82wCQYGZOm++xgMy+xRG4hGBFZG+sDwc5Cj7msziOU/+v7F/56cG30fhF9fOUd9ehCKiQTVtZDr+jpGwrA1eJNf/1BOQR9ry+3bDsvxFgVATw5bhH9h7d9zqNL9q7ZmapclOQIlgaK1hx1aA7j4A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=google.com; spf=pass smtp.mailfrom=flex--seanjc.bounces.google.com; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b=B3Vw1QNz; arc=none smtp.client-ip=209.85.216.74 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--seanjc.bounces.google.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="B3Vw1QNz" Received: by mail-pj1-f74.google.com with SMTP id 98e67ed59e1d1-32326e6d8a9so1192378a91.3 for ; Thu, 14 Aug 2025 09:18:04 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1755188284; x=1755793084; darn=vger.kernel.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=dZln5AlMLNKwBYNNEImRxFo070vZbrB9DRk7vU6UURM=; b=B3Vw1QNzIFORnAWNAzUkSPI/2tCwiNI6OqlVX6iIBnfTnXIqxqVBZhIxbrUYrsbkWn oN/b9K7lwxQMCnDySIA4yDQoEmHBAVhKxOzX6iEE6/MsjR+vxVo6hWTZwTifq8TN6H00 FAFT2B38MsZunHwlymSZjJVsBsiHVaQRo2YTfotbKnnhGwvlFyNTE7tBM6eeXdSUdK8Y jj2oDcxQrYvtK4f56YIql7y7x9UtI2YmvBXjqhGRl+h1Mru44Yy3Oa8qdZ98MRRsz1of 4AcSHvnvgOGv0sfIAXPtNXf3DnE7/RD2HGKvyOoGPKN+HbSGP7DDaWEQV6wblsXQrxR3 yQkg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1755188284; x=1755793084; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=dZln5AlMLNKwBYNNEImRxFo070vZbrB9DRk7vU6UURM=; b=mrbh7yd8tVQOnOUu8AGJJnj5UW9t4pPCOz/GgUec5p14XMf3jori0rajUa6FP/aOPP zJL0gXKS36Hz062YQ8JLsT1AbkVD3/D2BenYk7fSvhWnwkiHmsAY8KXAaA6ul1xjb6Ke prxbYbWv0Q+wvcf3WSBuRsPMbZBbrgl9tbnWT4zVcyGxxHetSMdt9LGBYOSiMebw8+wL wZvrflI9r/iOthsc9iUVBruvRIEtpIhQL25w4oTxg+8O2XJi//t5lb3ZrOZuM5M4BSR4 nvk3aByo8PmKNNv5Ft1AcXrll3KlSK3QCXaTK03BDXTaA6aDtUqAnHUjsTgV+TvDyDLe ObNw== X-Gm-Message-State: AOJu0YwgkoHIVLEEuqsFstHbM4thnBayXuJcQnqk4PQA+a4QnRtPZ6EB FwEmdSQQTMm5nO/BY58mKroV2wWVqa1oEALgP7U9vLWkZgyXI3lN2yBToC1InuezCc+71LNEyJs Usl9+gg== X-Google-Smtp-Source: AGHT+IFekJ5qSX8LD4mkTWDV4B8o06VKznGtFZ9FKJ3pol7rohFjrbQSC4kfyxJki1cma0d2iDS+u7gyZ70= X-Received: from pjbqc5.prod.google.com ([2002:a17:90b:2885:b0:31c:4a51:8b75]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90b:3d46:b0:321:265a:e0c2 with SMTP id 98e67ed59e1d1-32327ad25femr4484249a91.32.1755188284252; Thu, 14 Aug 2025 09:18:04 -0700 (PDT) Date: Thu, 14 Aug 2025 09:18:02 -0700 In-Reply-To: <20250814125614.2090890-3-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <2025081209-sworn-unholy-36ad@gregkh> <20250814125614.2090890-1-sashal@kernel.org> <20250814125614.2090890-3-sashal@kernel.org> Message-ID: Subject: Re: [PATCH 6.12.y 3/3] KVM: VMX: Wrap all accesses to IA32_DEBUGCTL with getter/setter APIs From: Sean Christopherson To: Sasha Levin Cc: stable@vger.kernel.org, Maxim Levitsky , Dapeng Mi Content-Type: text/plain; charset="us-ascii" On Thu, Aug 14, 2025, Sasha Levin wrote: > From: Maxim Levitsky > > [ Upstream commit 7d0cce6cbe71af6e9c1831bff101a2b9c249c4a2 ] > > Introduce vmx_guest_debugctl_{read,write}() to handle all accesses to > vmcs.GUEST_IA32_DEBUGCTL. This will allow stuffing FREEZE_IN_SMM into > GUEST_IA32_DEBUGCTL based on the host setting without bleeding the state > into the guest, and without needing to copy+paste the FREEZE_IN_SMM > logic into every patch that accesses GUEST_IA32_DEBUGCTL. > > No functional change intended. > > Cc: stable@vger.kernel.org > Signed-off-by: Maxim Levitsky > [sean: massage changelog, make inline, use in all prepare_vmcs02() cases] > Reviewed-by: Dapeng Mi > Link: https://lore.kernel.org/r/20250610232010.162191-8-seanjc@google.com > Signed-off-by: Sean Christopherson > Signed-off-by: Sasha Levin > --- Acked-by: Sean Christopherson