From: Borislav Petkov <bp@alien8.de>
To: "Nikunj A. Dadhania" <nikunj@amd.com>
Cc: David Rientjes <rientjes@google.com>,
linux-kernel@vger.kernel.org, x86@kernel.org,
kvm@vger.kernel.org, mingo@redhat.com, tglx@linutronix.de,
dave.hansen@linux.intel.com, seanjc@google.com,
pbonzini@redhat.com, thomas.lendacky@amd.com,
michael.roth@amd.com, stable@kernel.org
Subject: Re: [PATCH v3] x86/sev: Add SEV-SNP guest feature negotiation support
Date: Tue, 3 Jan 2023 12:29:23 +0100 [thread overview]
Message-ID: <Y7QRkzxg1HW9wMCp@zn.tnic> (raw)
In-Reply-To: <02a2e641-6b6d-e1c5-2c43-8815306d92a0@amd.com>
On Tue, Jan 03, 2023 at 09:07:14AM +0530, Nikunj A. Dadhania wrote:
> Currently, GHCBData[24:63] is unused. If we intend to use the bit range(40bits), GHCB spec
> will need to be updated. And probably would not be enough.
My fear too...
> As the termination request is done using GHCB MSR protocol, exit codes cannot be used.
We need to figure out some other way of communicating to the guest owner because
of which feature the guest refused booting.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2023-01-03 11:29 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-02 8:38 Nikunj A Dadhania
2023-01-02 11:23 ` David Rientjes
2023-01-02 15:20 ` Nikunj A. Dadhania
2023-01-02 19:42 ` Borislav Petkov
2023-01-03 3:25 ` Nikunj A. Dadhania
2023-01-02 20:02 ` Borislav Petkov
2023-01-03 3:37 ` Nikunj A. Dadhania
2023-01-03 11:29 ` Borislav Petkov [this message]
2023-01-03 23:25 ` David Rientjes
2023-01-03 13:40 ` Borislav Petkov
2023-01-04 4:26 ` Nikunj A. Dadhania
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