Re: [PATCH v3 08/10] arm/cpu: more customization for the kvm host cpu model

["Daniel P. Berrangé" <berrange@redhat.com>]

On Mon, Apr 14, 2025 at 06:38:47PM +0200, Cornelia Huck wrote:
> From: Eric Auger <eric.auger@redhat.com>
> 
> If the interface for writable ID registers is available, expose uint64
> SYSREG properties for writable ID reg fields exposed by the host
> kernel. Properties are named  SYSREG_<REG>_<FIELD> with REG and FIELD
> being those used  in linux arch/arm64/tools/sysreg. This done by
> matching the writable fields retrieved from the host kernel against the
> generated description of sysregs.
> 
> An example of invocation is:
> -cpu host,SYSREG_ID_AA64ISAR0_EL1_DP=0x0
> which sets DP field of ID_AA64ISAR0_EL1 to 0.

For the value you are illustrating 0x0 - is this implying that
all the flags take an arbitrary integer hex value ?

This would be different from x86, where CPU feature flags are
a boolean on/off state.

> [CH: add properties to the host model instead of introducing a new
> "custom" model]
> Signed-off-by: Eric Auger <eric.auger@redhat.com>

With regards,
Daniel
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