Re: [PATCH v3 5/6] KVM: arm64: rename functions for invariant sys regs

From: Eric Auger <eauger@redhat.com>
To: Sebastian Ott <sebott@redhat.com>
Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev,
	linux-kernel@vger.kernel.org, Marc Zyngier <maz@kernel.org>,
	Oliver Upton <oliver.upton@linux.dev>,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>
Subject: Re: [PATCH v3 5/6] KVM: arm64: rename functions for invariant sys regs
Date: Wed, 29 May 2024 19:17:45 +0200	[thread overview]
Message-ID: <1af3cb52-4311-4375-b384-71b0adeb8a32@redhat.com> (raw)
In-Reply-To: <5a00647d-7d33-81a6-c783-2212ff73ca8b@redhat.com>

Hi Sebastian,

On 5/29/24 17:29, Sebastian Ott wrote:
> Hej Eric,
> 
> On Wed, 29 May 2024, Eric Auger wrote:
>> On 5/14/24 09:22, Sebastian Ott wrote:
>>> Invariant system id registers are populated with host values
>>> at initialization time using their .reset function cb.
>> get_##reg call read_sysreg(). I don't really understand the above
>> sentence. Please could you elaborate?
>>
> 
> struct sys_reg_desc has 2 function pointers (among others):
> .reset and .get_user . The functions implementing these are
> usually named accordingly. For invariant registers only
> .reset is used but set to functions that are called get_*
> (which is usually used to implement .get_user).
> 
> E.g.: invariant_sys_regs[0].reset == get_midr_el1
> 
> When trying to figure out this code I was confused by this, hence
> this patch..

Ah OK, since ".reset=" was not used in the initilization I missed that.

feel free to add my
Reviewed-by: Eric Auger <eric.auger@redhat.com>

Eric
> 
> Sebastian
> 