linux-kernel - Re: [PATCH] KVM: arm64: Cleanup the __get_fault_info() to take out the code that validates HPFAR

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Date:   Tue, 27 Sep 2022 10:38:22 -0700
From:   Mingwei Zhang <mizhang@...gle.com>
To:     Reiji Watanabe <reijiw@...gle.com>
Cc:     Marc Zyngier <maz@...nel.org>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "moderated list:KERNEL VIRTUAL MACHINE FOR ARM64 (KVM/arm64)" 
        <kvmarm@...ts.cs.columbia.edu>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] KVM: arm64: Cleanup the __get_fault_info() to take out
 the code that validates HPFAR

> > +static inline bool __hpfar_is_valid(u64 esr)
>
> Unlike what the name implies, this function returns true for some
> cases that HPFAR is not valid (i.e. SEA).  I think the function
> returns true when KVM doesn't need HPFAR, or when HPFAR is valid.
> IMHO the name might be a bit misleading, although I don't have
> a good name for this.  It would be nice to state that in the
> comment at least.
>
> Thank you,
> Reiji
>

Yeah, I agree with you Reiji that the name does not reflect the
meaning of the function. So I was thinking about other names like
__translate_hpfar_to_far_needed().