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Date:   Wed, 15 Apr 2020 17:54:28 +0200
From:   Joerg Roedel <jroedel@suse.de>
To:     Tom Lendacky <thomas.lendacky@amd.com>
Cc:     Mike Stunes <mstunes@vmware.com>, Joerg Roedel <joro@8bytes.org>,
        "x86@kernel.org" <x86@kernel.org>, "hpa@zytor.com" <hpa@zytor.com>,
        Andy Lutomirski <luto@kernel.org>,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Thomas Hellstrom <thellstrom@vmware.com>,
        Jiri Slaby <jslaby@suse.cz>,
        Dan Williams <dan.j.williams@intel.com>,
        Juergen Gross <jgross@suse.com>,
        Kees Cook <keescook@chromium.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        "kvm@vger.kernel.org" <kvm@vger.kernel.org>,
        "virtualization@lists.linux-foundation.org" 
        <virtualization@lists.linux-foundation.org>
Subject: Re: [PATCH 40/70] x86/sev-es: Setup per-cpu GHCBs for the runtime
 handler
Message-ID: <20200415155428.GE21899@suse.de>
References: <20200319091407.1481-1-joro@8bytes.org>
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 <A7DF63B4-6589-4386-9302-6B7F8BE0D9BA@vmware.com>
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On Tue, Apr 14, 2020 at 03:04:42PM -0500, Tom Lendacky wrote:
> At that point the guest won't be able to communicate with the hypervisor,
> too. Maybe we should BUG() here to terminate further processing?

We could talk to the hypervisor, there is still the boot-GHCB in the
bss-decrypted section. But there is nothing that could be done here
anyway besides terminating the guest.


Regards,

	Joerg