KVM: arm64: vgic-its: Clear ITE when DISCARD frees an ITE

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commit 7602ffd1d5 upstream.

When DISCARD frees an ITE, it does not invalidate the
corresponding ITE. In the scenario of continuous saves and
restores, there may be a situation where an ITE is not saved
but is restored. This is unreasonable and may cause restore
to fail. This patch clears the corresponding ITE when DISCARD
frees an ITE.

Cc: stable@vger.kernel.org
Fixes: eff484e029 ("KVM: arm64: vgic-its: ITT save and restore")
Signed-off-by: Kunkun Jiang <jiangkunkun@huawei.com>
[Jing: Update with entry write helper]
Signed-off-by: Jing Zhang <jingzhangos@google.com>
Link: https://lore.kernel.org/r/20241107214137.428439-6-jingzhangos@google.com
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

This commit is contained in:

Kunkun Jiang 2024-12-04 12:23:57 -08:00 • committed by Greg Kroah-Hartman

parent fe695bc157

commit 21bc72eef0

1 changed files with 5 additions and 1 deletions

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arch/arm64/kvm/vgic/vgic-its.c

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