From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="pabpV9GQ" Received: from mail-yb1-xb4a.google.com (mail-yb1-xb4a.google.com [IPv6:2607:f8b0:4864:20::b4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AED569C for ; Wed, 13 Dec 2023 09:00:23 -0800 (PST) Received: by mail-yb1-xb4a.google.com with SMTP id 3f1490d57ef6-daee86e2d70so7864776276.0 for ; Wed, 13 Dec 2023 09:00:23 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1702486823; x=1703091623; 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=YEIp+Z98yah8auU1WQuG3cH/nZbC2Dnq/ftG5xnWKuA=; b=pabpV9GQ33XaJUu0cFxJYTthfk/k12oXgngcGxkd2E2o4vQmo+PVJVu98CSUO6uTzY JZI+H2fK25uy47Y3ySDm3HWseXcs9Qw+rPGj1L7xiE9pL+nhlsNVEv2jo1FyAnihI3PA hX0AtvGQ//+/TGyQSobqW8Wuu7ZAaW7gnEb5Q6uq0jTV4usn4pbNqf0ef26C6b6wecsb hu3XDXtYRJ46hXalik1Frc8Mulmx1CcE5QFa7C/GFbUQq5QkUGszp1WRBRpknZgcxA8F 57mbDVNNI284CUUWq/9qFfYPSWfaeU2DB3Kswq/It6naFLNs2VFxAkTgDmYhCbwBKN6m U7bQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1702486823; x=1703091623; 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=YEIp+Z98yah8auU1WQuG3cH/nZbC2Dnq/ftG5xnWKuA=; b=dpuGC/Lq7DJzX153xTmb/B5TXbxmieHNgL5UGGOXIrca9yhtc8mr2NRvPClmuRtnkl oS7IQMveicjCDnRDsSJgv1roEhiPYHlkShUZBxQ8TvMikDUMoqFEBfqju/ufM98rQezo B4latR4gug3/VOLEK/YQS9Prglp5JNBny24GqA0/3IOyPFGXCalmShRyX5Vi5O8YefQs H1pz0GkkZQ5CTzHI54Sc5WiWCfq31UAbNosuTaP095EIyiUTyepuAqteoVY4BFvK3DXb N24tfYkcFxCJRez/+fGD+8323LbWy600X64o5kiF5h+3fC8flp76sjlHty9g/hD9c8dG 7cxA== X-Gm-Message-State: AOJu0YxN2ixTYYlHS0LopiskqcoXSHe+Wckz9CzL5VQHAzUCVa+5Gm3r ykygYLZ6o9siXuUEziEfaMRx5twfp2c= X-Google-Smtp-Source: AGHT+IF9nGp44wo1fB5QlYX1jS8q2Y2b6Z+/0mKZHg5AzynSBFs1zE+w6qIuRVPL6VJg68r1XGw+2t6LnJg= X-Received: from zagreus.c.googlers.com ([fda3:e722:ac3:cc00:7f:e700:c0a8:5c37]) (user=seanjc job=sendgmr) by 2002:a05:6902:1782:b0:dbc:cfcd:9ad0 with SMTP id ca2-20020a056902178200b00dbccfcd9ad0mr19392ybb.4.1702486822942; Wed, 13 Dec 2023 09:00:22 -0800 (PST) Date: Wed, 13 Dec 2023 09:00:21 -0800 In-Reply-To: Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: Message-ID: Subject: Re: [Bug 218257] New: [Nested VM] Failed to boot L2 Windows guest on L1 Windows guest From: Sean Christopherson To: bugzilla-daemon@kernel.org Cc: kvm@vger.kernel.org Content-Type: text/plain; charset="us-ascii" On Tue, Dec 12, 2023, bugzilla-daemon@kernel.org wrote: > Environment: > ------------ > CPU Architecture: x86_64 > Host OS: CentOS Stream 9 > Guest OS L1: Windows 10 Pro (10.0.18362 N/A Build 18362), x64-based PC > Guest OS L2: Windows 10 Enterprises (10.0.10240 N/A Build 10240), x64-based PC > kvm.git next branch commit id: e9e60c82fe391d04db55a91c733df4a017c28b2f > qemu-kvm commit id: > Host Kernel Version: 6.7.0-rc1 > Hardware: Sapphire Rapids > > Bug detailed description: > -------------------------- > To verify two nested Windows guests scenarios, we used Windows image to create > L1 guest, then failed to boot L2 Windows guest on L1 guest. The error screen is > captured in attachment. > > Note: this is suspected to be a KVM Kernel bug by bisect the different commits: > kvm next + qemu-kvm = result > a1c288f87de7aff94e87724127eabb6cdb38b120 + d451e32c = bad > e1a6d5cf10dd93fc27d8c85cd7b3e41f08a816e6 + d451e32c = good Assuming `git bisect` didn't point at exactly the merge commit, can you please bisect to the exact commit, instead of the merge commit? I.e. git bisect start git bisect bad a1c288f87de7aff94e87724127eabb6cdb38b120 git bisect good e1a6d5cf10dd93fc27d8c85cd7b3e41f08a816e6 and go from there. Hopefully it isn't the merge commit that's being blamed, as that will be far more painful to figure out.