From: Peter Maydell <peter.maydell@linaro.org>
To: Richard Henderson <richard.henderson@linaro.org>
Cc: qemu-arm <qemu-arm@nongnu.org>, QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [PATCH v2 1/2] accel/tcg: Add tlb_flush_page_bits_by_mmuidx*
Date: Fri, 16 Oct 2020 22:40:32 +0100 [thread overview]
Message-ID: <CAFEAcA9AWL3oC000ws8gikr=teGNs=kz6x382K8kS68JWkdATw@mail.gmail.com> (raw)
In-Reply-To: <20201016210754.818257-2-richard.henderson@linaro.org>
On Fri, 16 Oct 2020 at 22:07, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> On ARM, the Top Byte Ignore feature means that only 56 bits of
> the address are significant in the virtual address. We are
> required to give the entire 64-bit address to FAR_ELx on fault,
> which means that we do not "clean" the top byte early in TCG.
>
> This new interface allows us to flush all 256 possible aliases
> for a given page, currently missed by tlb_flush_page*.
>
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
thanks
-- PMM
next prev parent reply other threads:[~2020-10-16 21:43 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-10-16 21:07 [PATCH v2 0/2] target/arm: Fix tlb flush page vs tbi Richard Henderson
2020-10-16 21:07 ` [PATCH v2 1/2] accel/tcg: Add tlb_flush_page_bits_by_mmuidx* Richard Henderson
2020-10-16 21:40 ` Peter Maydell [this message]
2020-10-16 21:07 ` [PATCH v2 2/2] target/arm: Use tlb_flush_page_bits_by_mmuidx* Richard Henderson
2020-10-17 9:01 ` [PATCH v2 0/2] target/arm: Fix tlb flush page vs tbi Philippe Mathieu-Daudé
2020-10-19 15:47 ` Peter Maydell
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='CAFEAcA9AWL3oC000ws8gikr=teGNs=kz6x382K8kS68JWkdATw@mail.gmail.com' \
--to=peter.maydell@linaro.org \
--cc=qemu-arm@nongnu.org \
--cc=qemu-devel@nongnu.org \
--cc=richard.henderson@linaro.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).