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Re: [PATCH v2 3/5] target/arm: Handle trapping to EL2 of AArch32 VMRS in
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From: |
Richard Henderson |
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Subject: |
Re: [PATCH v2 3/5] target/arm: Handle trapping to EL2 of AArch32 VMRS instructions |
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Date: |
Mon, 2 Dec 2019 08:56:57 -0800 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.2.1 |
On 12/2/19 4:45 PM, Marc Zyngier wrote:
>> Annoying that there's a bug in the manual -- FPSID is listed as group 0 in
>> plenty of places, except in the pseudo-code for Accessing the FPSID
>> which uses TID3.
>
> Are you sure? I'm looking at DDI0487E_a,
...
> Or have you spotted a discrepancy
> somewhere else (which would be oh-so-surprising...)?
In DDI0487E_a, page G8-6028:
> elsif EL2Enabled() && !ELUsingAArch32(EL2) && HCR_EL2.TID3 == '1' then
> AArch64.AArch32SystemAccessTrap(EL2, 0x08);
> elsif EL2Enabled() && ELUsingAArch32(EL2) && HCR.TID3 == '1' then
> AArch32.TakeHypTrapException(0x08);
> else
> return FPSID;
within the summary documentation for FPSID.
r~
[PATCH v2 2/5] target/arm: Honor HCR_EL2.TID1 trapping requirements, Marc Zyngier, 2019/12/01
[PATCH v2 4/5] target/arm: Handle AArch32 CP15 trapping via HSTR_EL2, Marc Zyngier, 2019/12/01
Re: [PATCH v2 0/5] target/arm: More EL2 trapping fixes, Peter Maydell, 2019/12/06