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Re: [Qemu-devel] [PATCH] target/arm: Implement v8M VLLDM and VLSTM
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From: |
Richard Henderson |
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Subject: |
Re: [Qemu-devel] [PATCH] target/arm: Implement v8M VLLDM and VLSTM |
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Date: |
Thu, 3 May 2018 10:57:26 -0700 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:52.0) Gecko/20100101 Thunderbird/52.7.0 |
On 05/03/2018 03:57 AM, Peter Maydell wrote:
> For v8M the instructions VLLDM and VLSTM support lazy saving
> and restoring of the secure floating-point registers. Even
> if the floating point extension is not implemented, these
> instructions must act as NOPs in Secure state, so they can
> be used as part of the secure-to-nonsecure call sequence.
>
> Fixes: https://bugs.launchpad.net/qemu/+bug/1768295
> Cc: address@hidden
> Signed-off-by: Peter Maydell <address@hidden>
> ---
> Worth cc'ing stable on this one because gcc and clang will
> emit this insn when calling functions with the cmse_nonsecure_call
> attribute.
Reviewed-by: Richard Henderson <address@hidden>
r~