Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
From:   Akihiko Odaki <akihiko.odaki@daynix.com>
Cc:     Marc Zyngier <maz@kernel.org>, linux-kernel@vger.kernel.org,
        kvmarm@lists.linux.dev, kvmarm@lists.cs.columbia.edu,
        linux-arm-kernel@lists.infradead.org,
        Mathieu Poirier <mathieu.poirier@linaro.org>,
        Oliver Upton <oliver.upton@linux.dev>,
        Suzuki K Poulose <suzuki.poulose@arm.com>,
        Alexandru Elisei <alexandru.elisei@arm.com>,
        James Morse <james.morse@arm.com>,
        Will Deacon <will@kernel.org>,
        Catalin Marinas <catalin.marinas@arm.com>,
        asahi@lists.linux.dev, Alyssa Rosenzweig <alyssa@rosenzweig.io>,
        Sven Peter <sven@svenpeter.dev>,
        Hector Martin <marcan@marcan.st>,
        Akihiko Odaki <akihiko.odaki@daynix.com>
Subject: [PATCH v3 0/7] KVM: arm64: Normalize cache configuration
Date:   Sun, 18 Dec 2022 14:14:05 +0900
Message-Id: <20221218051412.384657-1-akihiko.odaki@daynix.com>
MIME-Version: 1.0
Content-Transfer-Encoding: 8bit
To:     unlisted-recipients:; (no To-header on input)
Precedence: bulk

Before this change, the cache configuration of the physical CPU was
exposed to vcpus. This is problematic because the cache configuration a
vcpu sees varies when it migrates between vcpus with different cache
configurations.

Fabricate cache configuration from the sanitized value, which holds the
CTR_EL0 value the userspace sees regardless of which physical CPU it
resides on.

V2 -> V3:
- Corrected message for patch "Normalize cache configuration"
- Split patch "Normalize cache configuration"
- Added handling for CSSELR_EL1.TnD
- Added code to ignore RES0 in CSSELR_EL1
- Replaced arm64_ftr_reg_ctrel0.sys_val with
  read_sanitised_ftr_reg(SYS_CTR_EL0)
- Fixed vcpu->arch.ccsidr initialziation
- Added CCSIDR_EL1 sanitization
- Added FWB check
- Added a comment for CACHE_TYPE_SEPARATE
- Added MTE tag cache creation code for CLIDR_EL1 fabrication
- Removed CLIDR_EL1 reset code for reset caused by guest
- Added a comment for CCSIDR2

V2: https://lore.kernel.org/lkml/20221211051700.275761-2-akihiko.odaki@daynix.com/
V1: https://lore.kernel.org/lkml/525ff263-90b3-5b12-da31-171b09f9ad1b@daynix.com/

Akihiko Odaki (7):
  arm64/sysreg: Convert CCSIDR_EL1 to automatic generation
  arm64/sysreg: Add CCSIDR2_EL1
  arm64/cache: Move CLIDR macro definitions
  KVM: arm64: Always set HCR_TID2
  KVM: arm64: Allow user to set CCSIDR_EL1
  KVM: arm64: Mask FEAT_CCIDX
  KVM: arm64: Normalize cache configuration

 arch/arm64/include/asm/cache.h             |   9 +
 arch/arm64/include/asm/kvm_arm.h           |   3 +-
 arch/arm64/include/asm/kvm_emulate.h       |   4 -
 arch/arm64/include/asm/kvm_host.h          |   6 +-
 arch/arm64/include/asm/sysreg.h            |   1 -
 arch/arm64/kernel/cacheinfo.c              |   5 -
 arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h |   2 -
 arch/arm64/kvm/reset.c                     |   1 +
 arch/arm64/kvm/sys_regs.c                  | 246 +++++++++++++--------
 arch/arm64/tools/sysreg                    |  16 ++
 10 files changed, 182 insertions(+), 111 deletions(-)

-- 
2.38.1