[PATCH v2 2/4] mm: Support tlbbatch flush for a range of PTEs

[Will Deacon]

On Mon, Jan 13, 2025 at 04:38:59PM +1300, Barry Song wrote:
> From: Barry Song <v-songbaohua at oppo.com>
> 
> This is a preparatory patch to support batch PTE unmapping in
> `try_to_unmap_one`. It first introduces range handling for
> `tlbbatch` flush. Currently, the range is always set to the size of
> PAGE_SIZE.
> 
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Will Deacon <will at kernel.org>
> Cc: Thomas Gleixner <tglx at linutronix.de>
> Cc: Ingo Molnar <mingo at redhat.com>
> Cc: Borislav Petkov <bp at alien8.de>
> Cc: Dave Hansen <dave.hansen at linux.intel.com>
> Cc: "H. Peter Anvin" <hpa at zytor.com>
> Cc: Anshuman Khandual <anshuman.khandual at arm.com>
> Cc: Ryan Roberts <ryan.roberts at arm.com>
> Cc: Shaoqin Huang <shahuang at redhat.com>
> Cc: Gavin Shan <gshan at redhat.com>
> Cc: Kefeng Wang <wangkefeng.wang at huawei.com>
> Cc: Mark Rutland <mark.rutland at arm.com>
> Cc: David Hildenbrand <david at redhat.com>
> Cc: Lance Yang <ioworker0 at gmail.com>
> Cc: "Kirill A. Shutemov" <kirill.shutemov at linux.intel.com>
> Cc: Yosry Ahmed <yosryahmed at google.com>
> Cc: Paul Walmsley <paul.walmsley at sifive.com>
> Cc: Palmer Dabbelt <palmer at dabbelt.com>
> Cc: Albert Ou <aou at eecs.berkeley.edu>
> Cc: Yicong Yang <yangyicong at hisilicon.com>
> Signed-off-by: Barry Song <v-songbaohua at oppo.com>
> ---
>  arch/arm64/include/asm/tlbflush.h | 26 ++++++++++++++------------
>  arch/arm64/mm/contpte.c           |  2 +-
>  arch/riscv/include/asm/tlbflush.h |  3 ++-
>  arch/riscv/mm/tlbflush.c          |  3 ++-
>  arch/x86/include/asm/tlbflush.h   |  3 ++-
>  mm/rmap.c                         | 12 +++++++-----
>  6 files changed, 28 insertions(+), 21 deletions(-)

The arm64 bits look correct to me:

Acked-by: Will Deacon <will at kernel.org>

Will