linux-kernel - [PATCH v2 0/2] A couple of EL2 refcounts fixes

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Date:   Tue,  5 Oct 2021 10:01:40 +0100
From:   Quentin Perret <qperret@...gle.com>
To:     Marc Zyngier <maz@...nel.org>, James Morse <james.morse@....com>,
        Alexandru Elisei <alexandru.elisei@....com>,
        Suzuki K Poulose <suzuki.poulose@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Quentin Perret <qperret@...gle.com>,
        Fuad Tabba <tabba@...gle.com>,
        David Brazdil <dbrazdil@...gle.com>,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.cs.columbia.edu,
        linux-kernel@...r.kernel.org
Cc:     kernel-team@...roid.com
Subject: [PATCH v2 0/2] A couple of EL2 refcounts fixes

Hi all,

This is v2 of the series previously posted here:

https://lore.kernel.org/kvmarm/20211004090328.540941-1-qperret@google.com/

This addresses a couple of issues Will has found with the refcounting of
page-tables at EL2. Patch 01 fixes a nasty bug, and probably wants to go
in -stable. Patch 02 fixes a small inconsistency which made it harder to
find refcount-related bugs at EL2.

Changes since v1:
 - applied Acked-by from Will;
 - better comment + commit message for patch 01 (Marc).

Thanks!
Quentin

Quentin Perret (2):
  KVM: arm64: Fix host stage-2 PGD refcount
  KVM: arm64: Report corrupted refcount at EL2

 arch/arm64/kvm/hyp/include/nvhe/gfp.h |  1 +
 arch/arm64/kvm/hyp/nvhe/mem_protect.c | 13 ++++++++++++-
 arch/arm64/kvm/hyp/nvhe/page_alloc.c  | 15 +++++++++++++++
 3 files changed, 28 insertions(+), 1 deletion(-)

-- 
2.33.0.800.g4c38ced690-goog