Re: [Xen-devel] [PATCH v4] x86/arm/mm: use gfn instead of pfn in p2m_get_mem_access/p2m_set_mem_access

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

On 29/06/15 16:45, Vitaly Kuznetsov wrote:
> 'pfn' and 'start_pfn' are ambiguous, both these functions expect GFNs as 
> input.
>
> On x86 the interface of p2m_set_mem_access() in p2m.c doesn't match the
> declaration in p2m-common.h as 'pfn' is being used instead of 'start_pfn'.
>
> On ARM both p2m_set_mem_access and p2m_get_mem_access interfaces don't match
> declarations from p2m-common.h: p2m_set_mem_access uses 'pfn' instead of
> 'start_pfn' and p2m_get_mem_access uses 'gpfn' instead of 'pfn'.
>
> Convert p2m_get_mem_access/p2m_set_mem_access (and __p2m_get_mem_access on 
> ARM)
> interfaces to using gft_t instead of unsigned long and update all users of
> these functions.
>
> There is also an issue in p2m_get_mem_access on x86: 'gfn' parameter passed to
> gfn_lock/gfn_unlock is not defined. This code compiles only because of a
> coincidence: gfn_lock/gfn_unlock are currently macros which don't use their
> second argument.
>
> Signed-off-by: Vitaly Kuznetsov <vkuznets@xxxxxxxxxx>

Reviewed-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

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