linux-kernel - [PATCH v2 0/1] KVM: s390: fix a newly introduced bug

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Message-ID: <20250226123725.247578-1-imbrenda@linux.ibm.com>
Date: Wed, 26 Feb 2025 13:37:24 +0100
From: Claudio Imbrenda <imbrenda@...ux.ibm.com>
To: kvm@...r.kernel.org
Cc: linux-kernel@...r.kernel.org, linux-s390@...r.kernel.org,
        frankja@...ux.ibm.com, borntraeger@...ibm.com, david@...hat.com,
        nrb@...ux.ibm.com, seiden@...ux.ibm.com, nsg@...ux.ibm.com,
        schlameuss@...ux.ibm.com, hca@...ux.ibm.com
Subject: [PATCH v2 0/1] KVM: s390: fix a newly introduced bug

Fix race when making a page secure (hold pte lock again)

This should fix the issues I have seen, which I think/hope are also the same
issues that David found.


v1->v2:
* major refactoring
* walk the page tables only once
* when importing, manually fault in pages if needed

Claudio Imbrenda (1):
  KVM: s390: pv: fix race when making a page secure

 arch/s390/include/asm/uv.h |   2 +-
 arch/s390/kernel/uv.c      | 105 ++++++++++++++++++++++++++++++++++---
 arch/s390/kvm/gmap.c       |  99 +++-------------------------------
 arch/s390/kvm/kvm-s390.c   |  25 +++++----
 4 files changed, 121 insertions(+), 110 deletions(-)

-- 
2.48.1