From: James Morse <james.morse@arm.com>
To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu
Cc: Marc Zyngier <marc.zyngier@arm.com>,
Suzuki K Pouloze <suzuki.poulose@arm.com>,
James Morse <james.morse@arm.com>,
Julien Thierry <julien.thierry@arm.com>
Subject: [PATCH v3 0/2] KVM: arm64: Skip more of the SError vaxorcism
Date: Tue, 18 Jun 2019 16:18:07 +0100 [thread overview]
Message-ID: <20190618151809.259038-1-james.morse@arm.com> (raw)
In guest_enter we used ISR_EL1 to know if an SError is pending as we
really don't want to take it as an exception. We can do the same
in guest_exit, which saves toggling bits in pstate.
This lets us leave SError masked for the remainder of world-switch
without having to toggle pstate twice.
Changes since v2:
* Added patch 1 of this series to make the 'SError remains masked'
behaviour explicit
* Added missing isb before the isr_el1 read.
James Morse (2):
KVM: arm64: Re-mask SError after the one instruction window
KVM: arm64: Skip more of the SError vaxorcism
arch/arm64/kvm/hyp/entry.S | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
--
2.20.1
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next reply other threads:[~2019-06-18 15:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-18 15:18 James Morse [this message]
2019-06-18 15:18 ` [PATCH v3 1/2] KVM: arm64: Re-mask SError after the one instruction window James Morse
2019-06-18 15:18 ` [PATCH v3 2/2] KVM: arm64: Skip more of the SError vaxorcism James Morse
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