[PATCH 0/8] KVM: arm64: Host EL2 entry improvements

From: Marc Zyngier <maz@kernel.org>
To: linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: James Morse <james.morse@arm.com>,
	Julien Thierry <julien.thierry.kdev@gmail.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Andrew Scull <ascull@google.com>, Will Deacon <will@kernel.org>,
	Quentin Perret <qperret@google.com>,
	kernel-team@android.com
Subject: [PATCH 0/8] KVM: arm64: Host EL2 entry improvements
Date: Mon, 26 Oct 2020 09:51:08 +0000	[thread overview]
Message-ID: <20201026095116.72051-1-maz@kernel.org> (raw)

This small series reworks various bits of the host EL2 entry after
Andrew's extensive rework to move from direct function calls to a
SMCCC implementation.

The first 3 patches are plain bug fixes, and candidates for immediate
merge into 5.10.

The following 2 patches allow the use of direct function pointers at
EL2, something that we can't do at the moment (other than PC-relative
addressing). This requires a helper to translate pointers at runtime,
but the result is neat enough. This allows the rewrite of the host HVC
handling in a more maintainable way.

A similar patch removes the direct use of kimage_voffset, which we
won't be able to trust for much longer.

The last two patches are just cleanups and optimisations.

Patches on top of 5.10-rc1.

Marc Zyngier (8):
  KVM: arm64: Don't corrupt tpidr_el2 on failed HVC call
  KVM: arm64: Remove leftover kern_hyp_va() in nVHE TLB invalidation
  KVM: arm64: Drop useless PAN setting on host EL1 to EL2 transition
  KVM: arm64: Add kimg_hyp_va() helper
  KVM: arm64: Turn host HVC handling into a dispatch table
  KVM: arm64: Patch kimage_voffset instead of loading the EL1 value
  KVM: arm64: Simplify __kvm_enable_ssbs()
  KVM: arm64: Avoid repetitive stack access on host EL1 to EL2 exception

 arch/arm64/include/asm/kvm_asm.h    |   2 -
 arch/arm64/include/asm/kvm_mmu.h    |  16 ++
 arch/arm64/include/asm/sysreg.h     |   1 +
 arch/arm64/kernel/image-vars.h      |   5 +-
 arch/arm64/kvm/hyp/nvhe/host.S      |  14 +-
 arch/arm64/kvm/hyp/nvhe/hyp-init.S  |  23 ++-
 arch/arm64/kvm/hyp/nvhe/hyp-main.c  | 231 +++++++++++++++++-----------
 arch/arm64/kvm/hyp/nvhe/sysreg-sr.c |  11 --
 arch/arm64/kvm/hyp/nvhe/tlb.c       |   1 -
 arch/arm64/kvm/va_layout.c          |  56 +++++++
 10 files changed, 236 insertions(+), 124 deletions(-)

-- 
2.28.0