linux-kernel - [PATCH 6.1 00/12] KVM: arm64: Backport of SVE fixes to v6.1

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Message-Id: <20250325-stable-sve-6-1-v1-0-83259d427d84@kernel.org>
Date: Tue, 25 Mar 2025 18:48:14 +0000
From: Mark Brown <broonie@...nel.org>
To: Catalin Marinas <catalin.marinas@....com>, 
 Will Deacon <will@...nel.org>, Marc Zyngier <maz@...nel.org>, 
 James Morse <james.morse@....com>, 
 Suzuki K Poulose <suzuki.poulose@....com>, 
 Oliver Upton <oliver.upton@...ux.dev>, Oleg Nesterov <oleg@...hat.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 kvmarm@...ts.linux.dev, kvmarm@...ts.cs.columbia.edu, 
 Mark Brown <broonie@...nel.org>, Mark Rutland <mark.rutland@....com>, 
 Eric Auger <eauger@...hat.com>, Wilco Dijkstra <wilco.dijkstra@....com>, 
 Eric Auger <eric.auger@...hat.com>, Florian Weimer <fweimer@...hat.com>, 
 Fuad Tabba <tabba@...gle.com>, Jeremy Linton <jeremy.linton@....com>, 
 Paolo Bonzini <pbonzini@...hat.com>, James Clark <james.clark@...aro.org>
Subject: [PATCH 6.1 00/12] KVM: arm64: Backport of SVE fixes to v6.1

This series backports some recent fixes for SVE/KVM interactions from
Mark Rutland to v6.1.

Signed-off-by: Mark Brown <broonie@...nel.org>
---
Fuad Tabba (1):
      KVM: arm64: Calculate cptr_el2 traps on activating traps

Mark Brown (4):
      KVM: arm64: Discard any SVE state when entering KVM guests
      arm64/fpsimd: Track the saved FPSIMD state type separately to TIF_SVE
      arm64/fpsimd: Have KVM explicitly say which FP registers to save
      arm64/fpsimd: Stop using TIF_SVE to manage register saving in KVM

Mark Rutland (7):
      KVM: arm64: Unconditionally save+flush host FPSIMD/SVE/SME state
      KVM: arm64: Remove host FPSIMD saving for non-protected KVM
      KVM: arm64: Remove VHE host restore of CPACR_EL1.ZEN
      KVM: arm64: Remove VHE host restore of CPACR_EL1.SMEN
      KVM: arm64: Refactor exit handlers
      KVM: arm64: Mark some header functions as inline
      KVM: arm64: Eagerly switch ZCR_EL{1,2}

 arch/arm64/include/asm/fpsimd.h         |   4 +-
 arch/arm64/include/asm/kvm_host.h       |  19 +++---
 arch/arm64/include/asm/kvm_hyp.h        |   1 +
 arch/arm64/include/asm/processor.h      |   7 +++
 arch/arm64/kernel/fpsimd.c              |  69 +++++++++++++++------
 arch/arm64/kernel/process.c             |   2 +
 arch/arm64/kernel/ptrace.c              |   3 +
 arch/arm64/kernel/signal.c              |   7 ++-
 arch/arm64/kvm/arm.c                    |   1 -
 arch/arm64/kvm/fpsimd.c                 |  92 ++++++++-------------------
 arch/arm64/kvm/hyp/entry.S              |   5 ++
 arch/arm64/kvm/hyp/include/hyp/switch.h | 106 +++++++++++++++++++++-----------
 arch/arm64/kvm/hyp/nvhe/hyp-main.c      |   8 +--
 arch/arm64/kvm/hyp/nvhe/pkvm.c          |  17 +----
 arch/arm64/kvm/hyp/nvhe/switch.c        |  91 +++++++++++++++++----------
 arch/arm64/kvm/hyp/vhe/switch.c         |  12 ++--
 arch/arm64/kvm/reset.c                  |   3 +
 17 files changed, 259 insertions(+), 188 deletions(-)
---
base-commit: 344a09659766c83c42cdd4943318deabde89a9c3
change-id: 20250227-stable-sve-6-1-075c1295b363

Best regards,
-- 
Mark Brown <broonie@...nel.org>