From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f202.google.com (mail-pl1-f202.google.com [209.85.214.202]) (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 CCA9A26738C for ; Thu, 5 Feb 2026 02:10:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.202 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770257439; cv=none; b=pyjw2XEKdpwr78Fo6VOtQShQj9nehXAl4K024Qi4HQWXNS/zH7YES4iTPvv6e4xhbHq8vRHaYWsU1ydpQKxKvl3y4Qc/BsgmsStk/AGfZTqbj+gpImdPEg8So8ATM49TIVWV2z9v10p5sSbFVrbJFn0DinAfoo0caqXNRUI0L98= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770257439; c=relaxed/simple; bh=9ZdTXtzrOhvRo5simKSEwsH1biecBibpWIc2Pdvnc2I=; h=Date:In-Reply-To:Mime-Version:References:Message-ID:Subject:From: To:Cc:Content-Type; b=m7oyRJlkXG5fiE91BRF1r058UKc1H/L/QlT3cCVbjn7NxR0aKBDGw4AWkBzbhPKOaC3wHe+VUFEb2p95RACOoOxZC9oQrTGWwdkSwF+HJQJ9VCs84lsC0KpJRzuTPel/aMdEwpjDF0O4XtnLrii/YyAqwlS2dxyqP3giW8zs9gY= 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=uPBTs/+P; arc=none smtp.client-ip=209.85.214.202 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--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="uPBTs/+P" Received: by mail-pl1-f202.google.com with SMTP id d9443c01a7336-2a7b7f04a11so16415835ad.3 for ; Wed, 04 Feb 2026 18:10:38 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1770257438; x=1770862238; 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=JdutA3MpqUZBPI7cPMYXXhV0WOf5Qqlo7ixT7ubohgE=; b=uPBTs/+PnR0FNiABhXSP0W0MP0CSpRI4n2NluLC3I7gLq0p+IeFJRje4RU72JfQNJb fNgwmQoQZn26yAhz0HkeV/JdLdxu8KipQkxNwlfto5uihKu1EIgXGoEhEG+2E2gVN6rG mJAjkRN1wCnq/nGPqDAKXnse/t/KKDNemI1SWfst/HBNIi4X9KJ0s8Hpi+8EoYGEHQRd 34eNCMEqDOzjzXewRSIOSFrHpApRiRHJJaPrgiS6eDLuMs8rceMTcp3arnYX7JbhfJnO oJ7iUT5W5RZAAWRIi1GQgetb0qAH7Tvc1YaXzydVDKtqAWCyRKKTRtm1rWpRytir4Y26 tzVg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770257438; x=1770862238; 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=JdutA3MpqUZBPI7cPMYXXhV0WOf5Qqlo7ixT7ubohgE=; b=rlRwZtrgD9u33l/7PxQRvpk4OnJpdl4cxIgZ3+gnHevA22uMbhjItRnOb+NbLlAHJK 72yo9Z6OZEQvYbNA+HQGiYufsvBFIlhPkQcOvKThvwZ9RyqQL76j2iDx6j2FFBRC2WJR ox8tUxTx2FcrqIHDgGpk2mhHnr2eTBTDOx0lSMc+NeVRZWWDgmseEFResDsagOj3zeTY hy+3XUzzVZ14qgwgvz6bIehY6rOL8uZghS4aKAG+Sft9TkYH4P/+B+fZ61Z/hfpnAhME NKv2CYURC/1PqhswwCh2Rp+xOlwsO72EYqJ+gAFqf1X1d16gm3eMUyAkzhQcNCF8Xac6 jKoQ== X-Forwarded-Encrypted: i=1; AJvYcCVD9IUubX7BkaTswyiMFJzer2ujXfjXUeFw8TDzo2ylN1uWGlPtZ4COP0cSllM5hnBPRSk=@vger.kernel.org X-Gm-Message-State: AOJu0YzKvUv32yXLnthbEVTC3IZhpzZvRR7C0hlGZMFVMw+e9PEJDTd1 A7aSRx9bgJxqqGL6pmnuAPdfdIwdpAGbb7X1TpHUO9XgWTtpKqt0yvlMqKzhAGISCfUO9EzWlpr dMi5ebA== X-Received: from plrs9.prod.google.com ([2002:a17:902:b189:b0:29e:fff2:e965]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:903:196d:b0:2a0:c933:beed with SMTP id d9443c01a7336-2a933bc9ba0mr48939935ad.4.1770257438241; Wed, 04 Feb 2026 18:10:38 -0800 (PST) Date: Wed, 4 Feb 2026 18:10:36 -0800 In-Reply-To: Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20260130020735.2517101-1-yosry.ahmed@linux.dev> <20260130020735.2517101-3-yosry.ahmed@linux.dev> Message-ID: Subject: Re: [PATCH 2/3] KVM: nSVM: Do not track EFER.SVME toggling in guest mode From: Sean Christopherson To: Yosry Ahmed Cc: Paolo Bonzini , kvm@vger.kernel.org, linux-kernel@vger.kernel.org Content-Type: text/plain; charset="us-ascii" On Wed, Feb 04, 2026, Yosry Ahmed wrote: > On Wed, Feb 04, 2026 at 01:15:45PM -0800, Sean Christopherson wrote: > > All that said, I agree that pulling the rug out from under the VM is a terrible > > experience. What if we throw a triple fault at the vCPU so that L1 gets an > > immediate SHUTDOWN (not a VM-Exit, a SHUTDOWN of the L1 vCPU), instead of running > > random garbage from L2? > > I am fine with this too, anything is better than pulling the rug. I will > send a v2 and probably drop patch 1 (unless you prefer that we keep it). Drop it, otherwise we'll probably end up wasting several days bikeshedding the name.