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Re: [PATCH v2 02/17] linux-user: Introduce PAGE_ANON
From: |
Peter Maydell |
Subject: |
Re: [PATCH v2 02/17] linux-user: Introduce PAGE_ANON |
Date: |
Thu, 25 Jun 2020 17:23:01 +0100 |
On Fri, 5 Jun 2020 at 05:17, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> Record whether the backing page is anonymous, or if it has file
> backing. This will allow us to get close to the Linux AArch64
> ABI for MTE, which allows tag memory only on ram-backed VMAs.
>
> The real ABI allows tag memory on files, when those files are
> on ram-backed filesystems, such as tmpfs. We will not be able
> to implement that in QEMU linux-user.
>
> Thankfully, anonymous memory for malloc arenas is the primary
> consumer of this feature, so this restricted version should
> still be of use.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
- [PATCH v2 00/17] target-arm: Implement ARMv8.5-MemTag, user mode, Richard Henderson, 2020/06/05
- [PATCH v2 01/17] tcg: Introduce target-specific page data for user-only, Richard Henderson, 2020/06/05
- [PATCH v2 03/17] linux-user: Check for overflow in access_ok, Richard Henderson, 2020/06/05
- [PATCH v2 02/17] linux-user: Introduce PAGE_ANON, Richard Henderson, 2020/06/05
- Re: [PATCH v2 02/17] linux-user: Introduce PAGE_ANON,
Peter Maydell <=
- [PATCH v2 04/17] linux-user: Tidy VERIFY_READ/VERIFY_WRITE, Richard Henderson, 2020/06/05
- [PATCH v2 05/17] bsd-user: Tidy VERIFY_READ/VERIFY_WRITE, Richard Henderson, 2020/06/05
- [PATCH v2 06/17] linux-user: Do not use guest_addr_valid for h2g_valid, Richard Henderson, 2020/06/05
- [PATCH v2 07/17] linux-user: Fix guest_addr_valid vs reserved_va, Richard Henderson, 2020/06/05
- [PATCH v2 08/17] exec: Add support for TARGET_TAGGED_ADDRESSES, Richard Henderson, 2020/06/05