linux-kernel - Re: [PATCH] arm64: add ioremap physical address information

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Date:	Tue, 6 Jan 2015 14:17:01 +0000
From:	Will Deacon <will.deacon@....com>
To:	Min-Hua Chen <orca.chen@...il.com>
Cc:	Catalin Marinas <Catalin.Marinas@....com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: add ioremap physical address information

On Fri, Dec 26, 2014 at 04:52:10PM +0000, Min-Hua Chen wrote:
> In /proc/vmallocinfo, it's good to show the physical address
> of each ioremap in vmallocinfo. Add physical address information
> in arm64 ioremap.
> 
> 0xffffc900047f2000-0xffffc900047f4000    8192 _nv013519rm+0x57/0xa0
> [nvidia] phys=f8100000 ioremap
> 0xffffc900047f4000-0xffffc900047f6000    8192 _nv013519rm+0x57/0xa0
> [nvidia] phys=f8008000 ioremap
> 0xffffc90004800000-0xffffc90004821000  135168 e1000_probe+0x22c/0xb95
> [e1000e] phys=f4300000 ioremap
> 0xffffc900049c0000-0xffffc900049e1000  135168 _nv013521rm+0x4d/0xd0
> [nvidia] phys=e0140000 ioremap
> 
> Signed-off-by: Min-Hua Chen <orca.chen@...il.com>
> ---

Thanks, this looks useful for debugging.

  Acked-by: Will Deacon <will.deacon@....com>

I assume this can wait for 3.20?

Will


>  arch/arm64/mm/ioremap.c |    1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/mm/ioremap.c b/arch/arm64/mm/ioremap.c
> index cbb99c8..01e88c8 100644
> --- a/arch/arm64/mm/ioremap.c
> +++ b/arch/arm64/mm/ioremap.c
> @@ -62,6 +62,7 @@ static void __iomem *__ioremap_caller(phys_addr_t
> phys_addr, size_t size,
>      if (!area)
>          return NULL;
>      addr = (unsigned long)area->addr;
> +    area->phys_addr = phys_addr;
> 
>      err = ioremap_page_range(addr, addr + size, phys_addr, prot);
>      if (err) {
> --
> 1.7.10.4
> 
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