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* [PATCH v3 00/25] KVM: arm64: Introduce pKVM hyp VM and vCPU state at EL2
@ 2022-09-14  8:34 Will Deacon
  2022-09-14  8:34 ` [PATCH v3 01/25] KVM: arm64: Move hyp refcount manipulation helpers to common header file Will Deacon
                   ` (25 more replies)
  0 siblings, 26 replies; 29+ messages in thread
From: Will Deacon @ 2022-09-14  8:34 UTC (permalink / raw)
  To: kvmarm
  Cc: Marc Zyngier, kernel-team, kvm, Catalin Marinas, Chao Peng,
	Will Deacon, linux-arm-kernel

Hi folks,

This is v3 of the series previously posted here:

  Mega-series: https://lore.kernel.org/kvmarm/20220519134204.5379-1-will@kernel.org/
  v2: https://lore.kernel.org/all/20220630135747.26983-1-will@kernel.org/

There have been some significant changes since v2, including:

- Removal of unnecessary backpointer linking a hyp vCPU to its hyp VM in
  favour of container_of()

- Removing confusing use of 'shadow' at EL2 in favour of 'pkvm_hyp'
  (although this was much more work than a simple sed expression!)

- Simplified vm table lookup and removal of redundant table traversal

- Rework of the hypervisor fixmap to avoid redundant page-table walks

- Splitting of memory donations required to create a guest so that the
  requirement for physically-contiguous pages is reduced

- Fixed a memory leak when the stage-2 pgd is configured with an
  unsupported size

- Dropped rework of 'struct hyp_page' as it is not required by this
  series

- Improved commit messages

- Rebased onto v6.0-rc1

Oliver -- as discussed in person, I've left the owner ID enumeration
where it is for now since we will need to track the guest *instance* in
future and so consolidating this into the pgtable code is unlikely to be
beneficial.

As with the previous posting, the last patch is marked as RFC because,
although it plumbs in the shadow state, it is woefully inefficient and
copies to/from the host state on every vCPU run. Without the last patch,
the new structures are unused but we move considerably closer to
isolating guests from the host.

Cheers,

Will, Quentin, Fuad and Marc

Cc: Sean Christopherson <seanjc@google.com>
Cc: Will Deacon <will@kernel.org>
Cc: Vincent Donnefort <vdonnefort@google.com>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
Cc: Chao Peng <chao.p.peng@linux.intel.com>
Cc: Quentin Perret <qperret@google.com>
Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Fuad Tabba <tabba@google.com>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Marc Zyngier <maz@kernel.org>

Cc: kernel-team@android.com
Cc: kvm@vger.kernel.org
Cc: kvmarm@lists.cs.columbia.edu
Cc: linux-arm-kernel@lists.infradead.org

--->8

Fuad Tabba (3):
  KVM: arm64: Add hyp_spinlock_t static initializer
  KVM: arm64: Add infrastructure to create and track pKVM instances at
    EL2
  KVM: arm64: Instantiate pKVM hypervisor VM and vCPU structures from
    EL1

Quentin Perret (15):
  KVM: arm64: Move hyp refcount manipulation helpers to common header
    file
  KVM: arm64: Allow attaching of non-coalescable pages to a hyp pool
  KVM: arm64: Back the hypervisor 'struct hyp_page' array for all memory
  KVM: arm64: Fix-up hyp stage-1 refcounts for all pages mapped at EL2
  KVM: arm64: Implement do_donate() helper for donating memory
  KVM: arm64: Prevent the donation of no-map pages
  KVM: arm64: Add helpers to pin memory shared with the hypervisor at
    EL2
  KVM: arm64: Add per-cpu fixmap infrastructure at EL2
  KVM: arm64: Add generic hyp_memcache helpers
  KVM: arm64: Consolidate stage-2 initialisation into a single function
  KVM: arm64: Instantiate guest stage-2 page-tables at EL2
  KVM: arm64: Return guest memory from EL2 via dedicated teardown
    memcache
  KVM: arm64: Unmap 'kvm_arm_hyp_percpu_base' from the host
  KVM: arm64: Explicitly map 'kvm_vgic_global_state' at EL2
  KVM: arm64: Don't unnecessarily map host kernel sections at EL2

Will Deacon (7):
  KVM: arm64: Unify identifiers used to distinguish host and hypervisor
  KVM: arm64: Include asm/kvm_mmu.h in nvhe/mem_protect.h
  KVM: arm64: Rename 'host_kvm' to 'host_mmu'
  KVM: arm64: Initialise hypervisor copies of host symbols
    unconditionally
  KVM: arm64: Provide I-cache invalidation by virtual address at EL2
  KVM: arm64: Maintain a copy of 'kvm_arm_vmid_bits' at EL2
  KVM: arm64: Use the pKVM hyp vCPU structure in handle___kvm_vcpu_run()

 arch/arm64/include/asm/kvm_arm.h              |   2 +-
 arch/arm64/include/asm/kvm_asm.h              |   7 +-
 arch/arm64/include/asm/kvm_host.h             |  73 ++-
 arch/arm64/include/asm/kvm_hyp.h              |   3 +
 arch/arm64/include/asm/kvm_mmu.h              |   2 +-
 arch/arm64/include/asm/kvm_pgtable.h          |  20 +
 arch/arm64/include/asm/kvm_pkvm.h             |  38 ++
 arch/arm64/kernel/image-vars.h                |  15 -
 arch/arm64/kvm/arm.c                          |  61 ++-
 arch/arm64/kvm/hyp/hyp-constants.c            |   3 +
 arch/arm64/kvm/hyp/include/nvhe/mem_protect.h |  25 +-
 arch/arm64/kvm/hyp/include/nvhe/memory.h      |  23 +
 arch/arm64/kvm/hyp/include/nvhe/mm.h          |  18 +-
 arch/arm64/kvm/hyp/include/nvhe/pkvm.h        |  74 +++
 arch/arm64/kvm/hyp/include/nvhe/spinlock.h    |  10 +-
 arch/arm64/kvm/hyp/nvhe/cache.S               |  11 +
 arch/arm64/kvm/hyp/nvhe/hyp-main.c            | 110 +++-
 arch/arm64/kvm/hyp/nvhe/hyp-smp.c             |   2 +
 arch/arm64/kvm/hyp/nvhe/mem_protect.c         | 502 ++++++++++++++++--
 arch/arm64/kvm/hyp/nvhe/mm.c                  | 158 +++++-
 arch/arm64/kvm/hyp/nvhe/page_alloc.c          |  28 +-
 arch/arm64/kvm/hyp/nvhe/pkvm.c                | 444 ++++++++++++++++
 arch/arm64/kvm/hyp/nvhe/setup.c               |  96 ++--
 arch/arm64/kvm/hyp/pgtable.c                  |  21 +-
 arch/arm64/kvm/mmu.c                          |  55 +-
 arch/arm64/kvm/pkvm.c                         | 138 ++++-
 arch/arm64/kvm/reset.c                        |  29 -
 27 files changed, 1752 insertions(+), 216 deletions(-)
 create mode 100644 arch/arm64/kvm/hyp/include/nvhe/pkvm.h

-- 
2.37.2.789.g6183377224-goog

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^ permalink raw reply	[flat|nested] 29+ messages in thread

end of thread, other threads:[~2022-09-29 12:47 UTC | newest]

Thread overview: 29+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-09-14  8:34 [PATCH v3 00/25] KVM: arm64: Introduce pKVM hyp VM and vCPU state at EL2 Will Deacon
2022-09-14  8:34 ` [PATCH v3 01/25] KVM: arm64: Move hyp refcount manipulation helpers to common header file Will Deacon
2022-09-15  8:35   ` Oliver Upton
2022-09-14  8:34 ` [PATCH v3 02/25] KVM: arm64: Allow attaching of non-coalescable pages to a hyp pool Will Deacon
2022-09-14  8:34 ` [PATCH v3 03/25] KVM: arm64: Back the hypervisor 'struct hyp_page' array for all memory Will Deacon
2022-09-14  8:34 ` [PATCH v3 04/25] KVM: arm64: Fix-up hyp stage-1 refcounts for all pages mapped at EL2 Will Deacon
2022-09-14  8:34 ` [PATCH v3 05/25] KVM: arm64: Unify identifiers used to distinguish host and hypervisor Will Deacon
2022-09-14  8:34 ` [PATCH v3 06/25] KVM: arm64: Implement do_donate() helper for donating memory Will Deacon
2022-09-14  8:34 ` [PATCH v3 07/25] KVM: arm64: Prevent the donation of no-map pages Will Deacon
2022-09-14  8:34 ` [PATCH v3 08/25] KVM: arm64: Add helpers to pin memory shared with the hypervisor at EL2 Will Deacon
2022-09-14  8:34 ` [PATCH v3 09/25] KVM: arm64: Include asm/kvm_mmu.h in nvhe/mem_protect.h Will Deacon
2022-09-14  8:34 ` [PATCH v3 10/25] KVM: arm64: Add hyp_spinlock_t static initializer Will Deacon
2022-09-14  8:34 ` [PATCH v3 11/25] KVM: arm64: Rename 'host_kvm' to 'host_mmu' Will Deacon
2022-09-14  8:34 ` [PATCH v3 12/25] KVM: arm64: Add infrastructure to create and track pKVM instances at EL2 Will Deacon
2022-09-14  8:34 ` [PATCH v3 13/25] KVM: arm64: Instantiate pKVM hypervisor VM and vCPU structures from EL1 Will Deacon
2022-09-14  8:34 ` [PATCH v3 14/25] KVM: arm64: Add per-cpu fixmap infrastructure at EL2 Will Deacon
2022-09-24 19:10   ` kernel test robot
2022-09-14  8:34 ` [PATCH v3 15/25] KVM: arm64: Initialise hypervisor copies of host symbols unconditionally Will Deacon
2022-09-14  8:34 ` [PATCH v3 16/25] KVM: arm64: Provide I-cache invalidation by virtual address at EL2 Will Deacon
2022-09-14  8:34 ` [PATCH v3 17/25] KVM: arm64: Add generic hyp_memcache helpers Will Deacon
2022-09-14  8:34 ` [PATCH v3 18/25] KVM: arm64: Consolidate stage-2 initialisation into a single function Will Deacon
2022-09-14  8:34 ` [PATCH v3 19/25] KVM: arm64: Instantiate guest stage-2 page-tables at EL2 Will Deacon
2022-09-14  8:34 ` [PATCH v3 20/25] KVM: arm64: Return guest memory from EL2 via dedicated teardown memcache Will Deacon
2022-09-14  8:34 ` [PATCH v3 21/25] KVM: arm64: Unmap 'kvm_arm_hyp_percpu_base' from the host Will Deacon
2022-09-14  8:34 ` [PATCH v3 22/25] KVM: arm64: Maintain a copy of 'kvm_arm_vmid_bits' at EL2 Will Deacon
2022-09-14  8:34 ` [PATCH v3 23/25] KVM: arm64: Explicitly map 'kvm_vgic_global_state' " Will Deacon
2022-09-14  8:34 ` [PATCH v3 24/25] KVM: arm64: Don't unnecessarily map host kernel sections " Will Deacon
2022-09-14  8:35 ` [RFC PATCH v3 25/25] KVM: arm64: Use the pKVM hyp vCPU structure in handle___kvm_vcpu_run() Will Deacon
2022-09-29 12:47 ` [PATCH v3 00/25] KVM: arm64: Introduce pKVM hyp VM and vCPU state at EL2 Vincent Donnefort

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