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From: Oliver Upton <oupton@google.com>
To: kvmarm@lists.cs.columbia.edu
Cc: kvm@vger.kernel.org, linux-kernel@vger.kernel.org,
	Paolo Bonzini <pbonzini@redhat.com>,
	Marc Zyngier <maz@kernel.org>, James Morse <james.morse@arm.com>,
	Alexandru Elisei <alexandru.elisei@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	Peter Zijlstra <peterz@infradead.org>,
	Andy Lutomirski <luto@kernel.org>,
	linux-arm-kernel@lists.infradead.org,
	Peter Shier <pshier@google.com>,
	Shakeel Butt <shakeelb@google.com>,
	Guangyu Shi <guangyus@google.com>,
	Oliver Upton <oupton@google.com>
Subject: [PATCH 0/3] KVM: arm64: Use generic guest entry infrastructure
Date: Thu, 29 Jul 2021 19:56:29 +0000	[thread overview]
Message-ID: <20210729195632.489978-1-oupton@google.com> (raw)

The arm64 kernel doesn't yet support the full generic entry
infrastructure. That being said, KVM/arm64 doesn't properly handle
TIF_NOTIFY_RESUME and could pick this up by switching to the generic
guest entry infrasturture.

Patch 1 adds a missing vCPU stat to ARM64 to record the number of signal
exits to userspace.

Patch 2 unhitches entry-kvm from entry-generic, as ARM64 doesn't
currently support the generic infrastructure.

Patch 3 replaces the open-coded entry handling with the generic xfer
function.

This series was tested on an Ampere Mt. Jade reference system. The
series cleanly applies to kvm/queue (note that this is deliberate as the
generic kvm stats patches have not yet propagated to kvm-arm/queue) at
the following commit:

8ad5e63649ff ("KVM: Don't take mmu_lock for range invalidation unless necessary")

Oliver Upton (3):
  KVM: arm64: Record number of signal exits as a vCPU stat
  entry: KVM: Allow use of generic KVM entry w/o full generic support
  KVM: arm64: Use generic KVM xfer to guest work function

 arch/arm64/include/asm/kvm_host.h |  1 +
 arch/arm64/kvm/Kconfig            |  1 +
 arch/arm64/kvm/arm.c              | 26 ++++++++++++++------------
 arch/arm64/kvm/guest.c            |  3 ++-
 include/linux/entry-kvm.h         |  6 +++++-
 5 files changed, 23 insertions(+), 14 deletions(-)

-- 
2.32.0.554.ge1b32706d8-goog


             reply	other threads:[~2021-07-29 19:56 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-29 19:56 Oliver Upton [this message]
2021-07-29 19:56 ` [PATCH 1/3] KVM: arm64: Record number of signal exits as a vCPU stat Oliver Upton
2021-07-29 20:07   ` Jing Zhang
2021-07-29 20:23     ` Oliver Upton
2021-07-29 19:56 ` [PATCH 2/3] entry: KVM: Allow use of generic KVM entry w/o full generic support Oliver Upton
2021-07-29 19:56 ` [PATCH 3/3] KVM: arm64: Use generic KVM xfer to guest work function Oliver Upton

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