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Re: [RFC PATCH v1 01/12] Arm: GICv3: Sysreg emulation is applicable for Aarch64 only

To: Ayan Kumar Halder <ayankuma@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
From: Julien Grall <julien@xxxxxxx>
Date: Sat, 22 Oct 2022 11:00:49 +0100
Cc: sstabellini@xxxxxxxxxx, stefanos@xxxxxxxxxx, Volodymyr_Babchuk@xxxxxxxx, bertrand.marquis@xxxxxxx
Delivery-date: Sat, 22 Oct 2022 10:01:01 +0000
List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

Hi Ayan,

On 21/10/2022 16:31, Ayan Kumar Halder wrote:

Refer ARM DDI 0487G.b ID072021, EC==0b011000 is supported for Aarch64 state
only. This is when MSR, MRS, System instruction execution in AArch64 state
is trapped, that is not reported using EC 0b000000, 0b000001 or 0b000111.

I don't understand the second sentence. However, what matter here is thefact the system registers are 64-bit only.


The change itself, looks ok to me.

Cheers,

--
Julien Grall

References:
- [RFC PATCH v1 00/12] Arm: Enable GICv3 for AArch32
  - From: Ayan Kumar Halder
- [RFC PATCH v1 01/12] Arm: GICv3: Sysreg emulation is applicable for Aarch64 only
  - From: Ayan Kumar Halder

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