linux-kernel - [RFC PATCH v4 0/6] arm64: tlb: add support for TTL feature

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Message-ID: <20200324134534.1570-1-yezhenyu2@huawei.com>
Date:   Tue, 24 Mar 2020 21:45:28 +0800
From:   Zhenyu Ye <yezhenyu2@...wei.com>
To:     <will@...nel.org>, <mark.rutland@....com>,
        <catalin.marinas@....com>, <aneesh.kumar@...ux.ibm.com>,
        <akpm@...ux-foundation.org>, <npiggin@...il.com>,
        <peterz@...radead.org>, <arnd@...db.de>, <rostedt@...dmis.org>,
        <maz@...nel.org>, <suzuki.poulose@....com>, <tglx@...utronix.de>,
        <yuzhao@...gle.com>, <Dave.Martin@....com>, <steven.price@....com>,
        <broonie@...nel.org>, <guohanjun@...wei.com>
CC:     <yezhenyu2@...wei.com>, <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <linux-arch@...r.kernel.org>,
        <linux-mm@...ck.org>, <arm@...nel.org>, <xiexiangyou@...wei.com>,
        <prime.zeng@...ilicon.com>, <zhangshaokun@...ilicon.com>
Subject: [RFC PATCH v4 0/6] arm64: tlb: add support for TTL feature

In order to reduce the cost of TLB invalidation, the ARMv8.4 TTL
feature allows TLBs to be issued with a level allowing for quicker
invalidation.  This series provide support for this feature. 

Patch 1 and Patch 2 was provided by Marc on his NV series[1] patches,
which detect the TTL feature and add __tlbi_level interface.

See patches for details, Thanks.

[1] https://lore.kernel.org/linux-arm-kernel/20200211174938.27809-1-maz@kernel.org/


ChangeList:
v1:
add support for TTL feature in arm64.

v2:
build the patch on Marc's NV series[1].

v3:
use vma->vm_flags to replace mm->context.flags.

v4:
add Marc's patches into my series.


Marc Zyngier (2):
  arm64: Detect the ARMv8.4 TTL feature
  arm64: Add level-hinted TLB invalidation helper

Zhenyu Ye (4):
  arm64: Add level-hinted TLB invalidation helper to tlbi_user
  mm: Add page table level flags to vm_flags
  arm64: tlb: Use translation level hint in vm_flags
  mm: Set VM_LEVEL flags in some tlb_flush functions

 arch/arm64/include/asm/cpucaps.h  |  3 +-
 arch/arm64/include/asm/mmu.h      |  2 +
 arch/arm64/include/asm/sysreg.h   |  1 +
 arch/arm64/include/asm/tlb.h      | 12 +++++
 arch/arm64/include/asm/tlbflush.h | 74 ++++++++++++++++++++++++++++---
 arch/arm64/kernel/cpufeature.c    | 11 +++++
 arch/arm64/mm/hugetlbpage.c       |  4 +-
 arch/arm64/mm/mmu.c               | 14 ++++++
 include/asm-generic/pgtable.h     | 16 ++++++-
 include/linux/mm.h                | 10 +++++
 include/trace/events/mmflags.h    | 15 ++++++-
 mm/huge_memory.c                  |  8 +++-
 12 files changed, 157 insertions(+), 13 deletions(-)

-- 
2.19.1