Subject: Re: [PATCH 13/17] kvm-arm: Add stage2 page table modifiers
To: Christoffer Dall <christoffer.dall@linaro.org>
References: <1459787177-12767-1-git-send-email-suzuki.poulose@arm.com>
 <1459787177-12767-14-git-send-email-suzuki.poulose@arm.com>
 <20160408134257.GW8961@cbox>
Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org,
        marc.zyngier@arm.com, mark.rutland@arm.com, will.deacon@arm.com,
        catalin.marinas@arm.com
From: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Message-ID: <5707D01E.1050309@arm.com>
Date: Fri, 8 Apr 2016 16:37:02 +0100
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On 08/04/16 14:42, Christoffer Dall wrote:
> On Mon, Apr 04, 2016 at 05:26:13PM +0100, Suzuki K Poulose wrote:

>>
>> -static void clear_pud_entry(struct kvm *kvm, pud_t *pud, phys_addr_t addr)
>> +static void clear_stage2_pud_entry(struct kvm *kvm, pud_t *pud, phys_addr_t addr)
>>   {
>> -	pmd_t *pmd_table = pmd_offset(pud, 0);
>> -	VM_BUG_ON(pud_huge(*pud));
>> -	pud_clear(pud);
>> +	pmd_t *pmd_table __maybe_unused = stage2_pmd_offset(pud, 0);
>
> The __maybe_unused are slightly ugly, so it may be nicer to create the
> stage2_pmd_free() as static inline's if they're defined to do nothing
> instead.
>

Sure, we could do that for stage2. However, we will need to fix the host helpers
as well for making such a change in the _hyp version (for 16K + 36bit VA).

>>
>
> Acked-by: Christoffer Dall <christoffer.dall@linaro.org>
>


Thanks
Suzuki