From: Janosch Frank <frankja@linux.ibm.com>
To: Claudio Imbrenda <imbrenda@linux.ibm.com>, kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org,
borntraeger@de.ibm.com, nrb@linux.ibm.com, seiden@linux.ibm.com,
gra@linux.ibm.com, schlameuss@linux.ibm.com, hca@linux.ibm.com,
david@kernel.org
Subject: Re: [PATCH v2 1/8] KVM: s390: vsie: Fix dat_split_ste()
Date: Tue, 24 Mar 2026 13:57:35 +0100 [thread overview]
Message-ID: <0c776347-5829-4c9a-98cb-7ed5cf070267@linux.ibm.com> (raw)
In-Reply-To: <20260320161542.202913-2-imbrenda@linux.ibm.com>
On 3/20/26 17:15, Claudio Imbrenda wrote:
> If the guest misbehaves and puts the page tables for its nested guest
> inside the memory of the nested guest itself, the shadow mapping will
> lose synchronization with the actual mapping.
>
Maybe add this (or similar) instead of the sentence below:
This is due to the fact that we don't propagate the vsie bit from large
STEs to all PTEs when splitting.
Let's copy that bit over just like the prefix bit.
> Propagate the vsie_notif bit from shadowed large pages to smaller pages
> when splitting a large page.
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
next prev parent reply other threads:[~2026-03-24 12:57 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-20 16:15 [PATCH v2 0/8] KVM: s390: More memory management fixes Claudio Imbrenda
2026-03-20 16:15 ` [PATCH v2 1/8] KVM: s390: vsie: Fix dat_split_ste() Claudio Imbrenda
2026-03-23 10:46 ` Steffen Eiden
2026-03-23 13:43 ` Christoph Schlameuss
2026-03-24 12:57 ` Janosch Frank [this message]
2026-03-20 16:15 ` [PATCH v2 2/8] KVM: s390: Remove non-atomic dat_crstep_xchg() Claudio Imbrenda
2026-03-23 10:46 ` Steffen Eiden
2026-03-20 16:15 ` [PATCH v2 3/8] KVM: s390: vsie: Fix check for pre-existing shadow mapping Claudio Imbrenda
2026-03-23 10:47 ` Steffen Eiden
2026-03-24 13:14 ` Janosch Frank
2026-03-20 16:15 ` [PATCH v2 4/8] KVM: s390: Fix gmap_link() Claudio Imbrenda
2026-03-23 10:47 ` Steffen Eiden
2026-03-24 14:01 ` Janosch Frank
2026-03-20 16:15 ` [PATCH v2 5/8] KVM: s390: vsie: Fix refcount overflow for shadow gmaps Claudio Imbrenda
2026-03-23 10:49 ` Steffen Eiden
2026-03-24 14:35 ` Janosch Frank
2026-03-20 16:15 ` [PATCH v2 6/8] KVM: s390: vsie: Fix unshadowing while shadowing Claudio Imbrenda
2026-03-24 14:52 ` Janosch Frank
2026-03-24 15:28 ` Claudio Imbrenda
2026-03-20 16:15 ` [PATCH v2 7/8] KVM: s390: vsie: Fix guest page tables protection Claudio Imbrenda
2026-03-24 15:20 ` Janosch Frank
2026-03-20 16:15 ` [PATCH v2 8/8] KVM: s390: Fix KVM_S390_VCPU_FAULT ioctl Claudio Imbrenda
2026-03-23 11:10 ` Steffen Eiden
2026-03-24 8:47 ` Janosch Frank
2026-03-23 11:27 ` Christian Borntraeger
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