From: vladimir.murzin@arm.com (Vladimir Murzin)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 0/3] Support Common Not Private translations
Date: Fri, 18 May 2018 10:59:27 +0100 [thread overview]
Message-ID: <981db1e7-687a-93a9-bea2-1fadcf5a4bd8@arm.com> (raw)
In-Reply-To: <1526636765-11289-1-git-send-email-vladimir.murzin@arm.com>
On 18/05/18 10:46, Vladimir Murzin wrote:
> Common Not Private (CNP) translations is a feature of ARMv8.2
> extension which allows translation table entries to be shared between
> different PEs in the same inner shareable domain, so the hardware can
> use this fact to optimise the caching of such entries in the TLB.
>
> This patch set is an attempt to bring CNP support into Linux. It was
> tested on a v8.2 Fast Model with exploring traces and checking that
> TTBRx_ELy and VTTBR_EL2 have CnP bit set where appropriate.
>
> Changelog:
>
> v2 -> v3
> - do not enable CNP if we are crush kernel (per James)
> - default to "no"
> - rebased on 4.17-rc4
Please, ignore it - it was generated from outdated branch. I'll resend
shortly.
Thanks
Vladimir
>
> v1 -> v2
> - handle cpuilde case (per James)
> - use lm_allias with swapper_pg_dir (per James)
> - rule out ARM64_SW_TTBR0_PAN case (per Catalin)
> - s/BUG_ON/WARN_ON/ (per Catalin)
> - comment and commit message updates (per Catalin)
> - TTBR_CNP_BIT moved to asm/pgtable-hwdef.h (per Catalin)
> - has_useable_cnp() simplified (per Julien)
>
> RFC -> v1
> - dropped RFC tag
> - rebased on 4.14-rc4
>
> Thanks!
>
> Vladimir Murzin (3):
> arm64: mm: Support Common Not Private translations
> arm64: KVM: Enable Common Not Private translations
> arm64: Introduce command line parameter to disable CNP
>
> Documentation/admin-guide/kernel-parameters.txt | 4 +++
> arch/arm/include/asm/kvm_mmu.h | 5 ++++
> arch/arm64/Kconfig | 13 ++++++++
> arch/arm64/include/asm/cpucaps.h | 3 +-
> arch/arm64/include/asm/cpufeature.h | 6 ++++
> arch/arm64/include/asm/kvm_mmu.h | 5 ++++
> arch/arm64/include/asm/mmu_context.h | 12 ++++++++
> arch/arm64/include/asm/pgtable-hwdef.h | 2 ++
> arch/arm64/kernel/cpufeature.c | 40 +++++++++++++++++++++++++
> arch/arm64/kernel/hibernate.c | 2 +-
> arch/arm64/kernel/suspend.c | 4 +++
> arch/arm64/kvm/hyp-init.S | 3 ++
> arch/arm64/mm/context.c | 3 ++
> arch/arm64/mm/proc.S | 6 ++++
> virt/kvm/arm/arm.c | 4 +--
> 15 files changed, 108 insertions(+), 4 deletions(-)
>
prev parent reply other threads:[~2018-05-18 9:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-05-18 9:46 [PATCH v3 0/3] Support Common Not Private translations Vladimir Murzin
2018-05-18 9:46 ` [PATCH v3 1/3] arm64: mm: " Vladimir Murzin
2018-05-18 9:46 ` [PATCH v3 2/3] arm64: KVM: Enable " Vladimir Murzin
2018-05-18 9:46 ` [PATCH v3 3/3] arm64: Introduce command line parameter to disable CNP Vladimir Murzin
2018-05-18 9:59 ` Vladimir Murzin [this message]
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