From: Hendrik Brueckner <brueckner@linux.ibm.com>
To: Eric Farman <farman@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>,
Hendrik Brueckner <brueckner@linux.ibm.com>,
Janosch Frank <frankja@linux.ibm.com>,
Claudio Imbrenda <imbrenda@linux.ibm.com>,
David Hildenbrand <david@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Jonathan Corbet <corbet@lwn.net>,
Shuah Khan <skhan@linuxfoundation.org>,
kvm@vger.kernel.org, linux-s390@vger.kernel.org
Subject: Re: [PATCH v2 1/4] KVM: s390: vsie: Allow non-zarch guests
Date: Wed, 1 Apr 2026 19:45:30 +0200 [thread overview]
Message-ID: <ac1ZuhOhDuC_BDRo@linux.ibm.com> (raw)
In-Reply-To: <20260401151221.2272408-2-farman@linux.ibm.com>
On Wed, Apr 01, 2026 at 05:12:18PM +0200, Eric Farman wrote:
> Linux/KVM runs in z/Architecture-only mode. Although z/Architecture
> is built upon a long history of hardware refinements, any other
> CPU mode is not permitted.
>
> Allow a userspace to explicitly enable the use of ESA mode for
> nested guests, otherwise usage will be rejected.
>
> Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
> Signed-off-by: Eric Farman <farman@linux.ibm.com>
Reviewed-by: Hendrik Brueckner <brueckner@linux.ibm.com>
next prev parent reply other threads:[~2026-04-01 17:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-04-01 15:12 [PATCH v2 0/4] KVM: s390: Permit ESA mode guests in VSIE Eric Farman
2026-04-01 15:12 ` [PATCH v2 1/4] KVM: s390: vsie: Allow non-zarch guests Eric Farman
2026-04-01 15:17 ` Christian Borntraeger
2026-04-01 17:45 ` Hendrik Brueckner [this message]
2026-04-01 15:12 ` [PATCH v2 2/4] KVM: s390: vsie: Disable some bits when in ESA mode Eric Farman
2026-04-01 17:48 ` Hendrik Brueckner
2026-04-01 15:12 ` [PATCH v2 3/4] KVM: s390: vsie: Accommodate ESA prefix pages Eric Farman
2026-04-01 17:51 ` Hendrik Brueckner
2026-04-01 15:12 ` [PATCH v2 4/4] KVM: s390: Add KVM capability for ESA mode guests Eric Farman
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