Re: [PATCH v4 1/3] KVM: arm64: Disable fields that KVM doesn't know how to handle in ID_AA64PFR1_EL1

From: Shaoqin Huang
Date: Thu Jul 18 2024 - 02:58:39 EST


Hi Oliver,

On 7/18/24 14:09, Oliver Upton wrote:
Hi Shaoqin,

On Wed, Jul 17, 2024 at 11:50:14PM -0400, Shaoqin Huang wrote:
For some of the fields in the ID_AA64PFR1_EL1 register, KVM doesn't know
how to handle them right now. So explicitly disable them in the register
accessor, then those fields value will be masked to 0 even if on the
hardware the field value is 1.

It is probably important to note that the only reason this is safe to do
from a UAPI POV is that read_sanitised_ftr_reg() doesn't yet return a
nonzero value for any of these fields.

(Reply again by the plain text)

Yeah. That would be more clear if I tell the reader this information. Will add this when updating.

Thanks,
Shaoqin



--
Shaoqin