From: Peter Maydell <peter.maydell@linaro.org>
To: Bug 1679358 <1679358@bugs.launchpad.net>
Cc: QEMU Developers <qemu-devel@nongnu.org>
Subject: Re: [Qemu-devel] [Bug 1679358] [NEW] ARM: SCTLR fields not being preserved
Date: Tue, 4 Apr 2017 09:32:56 +0100 [thread overview]
Message-ID: <CAFEAcA_R4MWGRtEzNdDfyaPQKE8iKKp6-yc0bJ7fy6EnN3ELZg@mail.gmail.com> (raw)
In-Reply-To: <20170403221712.26304.98856.malonedeb@chaenomeles.canonical.com>
On 3 April 2017 at 23:17, Yifan <yifanlu94@gmail.com> wrote:
> There are fields in SCTLR that are RAO/SBOP or WI or in the case of the
> RR field, accessible only in secure mode. Currently it seems that qemu
> just propagates any write to SCTLR to the register and this screwed up
> in a bootloader that I am debugging.
Yes, we're a bit loose in QEMU on the handling of reserved bits.
Note that most of the SCTLR bits like this are RAO/SBOP or RAZ/SBZP,
so the guest should not be writing wrong values to them.
thanks
-- PMM
next prev parent reply other threads:[~2017-04-04 8:33 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-03 22:17 [Qemu-devel] [Bug 1679358] [NEW] ARM: SCTLR fields not being preserved Yifan
2017-04-04 8:32 ` Peter Maydell [this message]
2017-04-04 14:59 ` [Qemu-devel] [Bug 1679358] " Yifan
2017-04-04 15:14 ` Peter Maydell
2017-11-06 19:18 ` Peter Maydell
2021-05-08 5:29 ` [Bug 1679358] Re: ARM: RES0/RES1 SCTLR fields not read-only Thomas Huth
2021-07-08 4:17 ` Launchpad Bug Tracker
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