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Re: [Qemu-devel] [Bug 1679358] [NEW] ARM: SCTLR fields not being preserv
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From: |
Peter Maydell |
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Subject: |
Re: [Qemu-devel] [Bug 1679358] [NEW] ARM: SCTLR fields not being preserved |
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Date: |
Tue, 4 Apr 2017 09:32:56 +0100 |
On 3 April 2017 at 23:17, Yifan <address@hidden> 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