linux-kernel - [PATCH v1 0/4] s390/kvm: fix MVPG when in VSIE

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Message-Id: <20201218141811.310267-1-imbrenda@linux.ibm.com>
Date:   Fri, 18 Dec 2020 15:18:07 +0100
From:   Claudio Imbrenda <imbrenda@...ux.ibm.com>
To:     linux-kernel@...r.kernel.org
Cc:     borntraeger@...ibm.com, frankja@...ux.ibm.com, david@...hat.com,
        kvm@...r.kernel.org, linux-s390@...r.kernel.org
Subject: [PATCH v1 0/4] s390/kvm: fix MVPG when in VSIE

The current handling of the MVPG instruction when executed in a nested
guest is wrong, and can lead to the nested guest hanging.

This patchset fixes the behaviour to be more architecturally correct,
and fixes the hangs observed.

Claudio Imbrenda (4):
  s390/kvm: VSIE: stop leaking host addresses
  s390/kvm: extend guest_translate for MVPG interpretation
  s390/kvm: add kvm_s390_vsie_mvpg_check needed for VSIE MVPG
  s390/kvm: VSIE: correctly handle MVPG when in VSIE

 arch/s390/kvm/gaccess.c | 88 ++++++++++++++++++++++++++++++++++++++---
 arch/s390/kvm/gaccess.h |  3 ++
 arch/s390/kvm/vsie.c    | 78 +++++++++++++++++++++++++++++++++---
 3 files changed, 159 insertions(+), 10 deletions(-)

-- 
2.26.2